Page 32«..1020..31323334..40..»

Researchers discover new blood vessel-generating cell with therapeutic potential

By raymumme

Public release date: 16-Oct-2012 [ | E-mail | Share ]

Contact: Bryan Ghosh bghosh@plos.org 44-122-344-2837 Public Library of Science

Researchers at the University of Helsinki believe they have discovered stem cells that play a decisive role in the growth of new blood vessels. If researchers learn to isolate and efficiently produce these stem cells found in blood vessel walls, the cells could offer new opportunities for developing therapeutics to treat diseases, such as cardiovascular disease and cancer. The study reporting the discovery of these stem cells is published in the open access journal PLOS Biology on October 16.

The growth of new blood vessels, known as neoangiogenesis, occurs during the repair of damaged tissue and organs in adults. However, malignant tumours also grow new blood vessels in order to receive oxygen and nutrients. As such, neoangiogenesis is both beneficial and detrimental to health, depending on the context, requiring therapeutic approaches that can either help to stimulate or prevent it. Therapeutics that aim to prevent the growth of new blood vessels are already in use, but the results are often more modest than predicted.

Adjunct Professor Petri Salvn and his team, from the University of Helsinki, now report that these stem cells can be found among the cellsso-called endothelial cellsthat line the inside of blood vessel walls. He explains, "we succeeded in isolating endothelial cells with a high rate of division in the blood vessel walls of mice. We found these same cells in human blood vessels and blood vessels growing in malignant tumours in humans. These cells are known as vascular endothelial stem cells, abbreviated as VESC. In a cell culture, one such cell is capable of producing tens of millions of new blood vessel wall cells".

From their studies in mice, the team are able to show that the growth of new blood vessels weakens, and the growth of malignant tumours slows, if the amount of these cells is below normal. Conversely, new blood vessels form where these stem cells are implanted.

"The identification and isolation of an entirely new adult stem cell type is a significant discovery in stem cell biology." explains Salvn. "Endothelial stem cells in blood vessels are particularly interesting, because they offer great potential for applications in practical medicine and the treatment of patients."

If an efficient method of vascular endothelial stem cell production could be developed, it could offer new treatment opportunities in situations where damaged tissue or diseases call for new blood vessel growth, or where the constriction or dysfunction of blood vessels deprives tissues of oxygen, for example in cardiac disease. These cells also offer new opportunities for developing therapeutics that seek to prevent new blood vessel growth in malignant tumours.

###

Funding: The work was supported by the Finnish Academy of Sciences. The funders had no role in study design, data collection and analysis, decision to publish,or preparation of the manuscript.

See the rest here:
Researchers discover new blood vessel-generating cell with therapeutic potential

To Read More: Researchers discover new blood vessel-generating cell with therapeutic potential
categoriaCardiac Stem Cells commentoComments Off on Researchers discover new blood vessel-generating cell with therapeutic potential | dataOctober 20th, 2012
Read All

Leading bone marrow transplant expert recommends significant change to current practice

By raymumme

Public release date: 17-Oct-2012 [ | E-mail | Share ]

Contact: Dean Forbes dforbes@fhcrc.org 206-667-2896 Fred Hutchinson Cancer Research Center

SEATTLE One of the world's leading bone marrow transplant experts is recommending a significant change to current transplant practice for patients who need marrow or adult stem cells from an unrelated donor to treat hematologic malignancies. Fred Appelbaum, M.D., director of the Clinical Research Division at Fred Hutchinson Cancer Research Center, asserts that bone marrow not circulating, peripheral blood, which is the current norm should be the source for unrelated donor adult stem cells for most patients who require a transplant. The reason: because there is less incidence of chronic graft-versus-host disease (GVHD), which can be a debilitating side effect of transplantation.

Appelbaum called for the change in an Oct. 18 editorial in The New England Journal of Medicine in response to a new study, published in the same issue, which compared survival rates and side effects of treating patients with hematopoietic adult stem cells derived from bone marrow versus circulating peripheral blood. The study found a higher incidence of chronic GVHD 53 percent when peripheral blood was the source of stem cells for transplant versus 41 percent when bone marrow is the source.

"For the majority of unrelated transplants following a standard high-dose preparative regimen, bone marrow should be used since survival is equivalent with the two sources but the incidence of chronic graft-versus-host disease, which can be a debilitating complication, is significantly less with marrow," Appelbaum wrote.

GVHD is a common side effect in people who receive cells from an unrelated donor. It occurs when the transplanted cells recognize the recipient's tissues as foreign and attack the tissues. This can cause a variety of problems, including skin rashes, liver problems and diarrhea. Chronic GVHD can develop any time between three months and three years after the transplant and can range from mild to serious in intensity.

Appelbaum said that stem cells derived from peripheral blood should only be used for the minority of patients in whom the benefits outweigh the risks. These include patients in need of rapid engraftment, such as those with life-threatening infections, or patients at high risk for graft rejection, such as those who receive reduced-intensity conditioning that does not include intensive chemotherapy.

For the past 10 years peripheral blood has been the norm as a source of matched related and matched unrelated adult stem cells for transplant because, despite the higher risk of GVHD, they are easier to harvest from the donor, they can be stimulated to grow in large numbers prior to harvesting, and they engraft, or set up shop, quickly inside the recipient's body.

The potential impact if such a practice change were widely implemented is large. Currently, about 75 percent of unrelated donor transplants are done using stem cells that are collected from the peripheral blood of donors. About 70 percent of all patients who undergo a life-saving transplant to treat blood cancers such as leukemia require an unrelated donor. Collecting adult stem cells from bone marrow is a more invasive process than collecting them from the bloodstream.

According to Appelbaum, about 5,500 unrelated donor transplants were performed in the United States last year. More than 20 million potential unrelated donors are typed and listed in registries in the Americas, Europe and Asia.

More here:
Leading bone marrow transplant expert recommends significant change to current practice

To Read More: Leading bone marrow transplant expert recommends significant change to current practice
categoriaBone Marrow Stem Cells commentoComments Off on Leading bone marrow transplant expert recommends significant change to current practice | dataOctober 20th, 2012
Read All

Key player in Parkinson's disease triggered neuron loss pinpointed

By raymumme

London, October 20 (ANI): By reprogramming skin cells from Parkinson's patients with a known genetic mutation, researchers have identified the damage to neural stem cells as a powerful player in the disease.

The scientists from the Salk Institute for Biological Studies found that a common mutation to a gene that produce the enzyme LRRK2, which is responsible for both familial and sporadic cases of Parkinson's disease, deforms the membrane surrounding the nucleus of a neural stem cell.

Damaging the nuclear architecture leads to destruction of these powerful cells, as well as their decreased ability to spawn functional neurons, such as the ones that respond to dopamine.

The researchers checked their laboratory findings with brain samples from Parkinson's disease patients and found the same nuclear envelope impairment.

"This discovery helps explain how Parkinson's disease, which has been traditionally associated with loss of neurons that produce dopamine and subsequent motor impairment, could lead to locomotor dysfunction and other common non-motor manifestations, such as depression and anxiety," Juan Carlos Izpisua Belmonte, lead researcher of the study, said.

"Similarly, current clinical trials explore the possibility of neural stem cell transplantation to compensate for dopamine deficits. Our work provides the platform for similar trials by using patient-specific corrected cells. It identifies degeneration of the nucleus as a previously unknown player in Parkinson's," Belmonte said.

Although the researchers say that they don't yet know whether these nuclear aberrations cause Parkinson's disease or are a consequence of it, they say the discovery could offer clues about potential new therapeutic approaches.

For example, they were able to use targeted gene-editing technologies to correct the mutation in patient's nuclear stem cells. This genetic correction repaired the disorganization of the nuclear envelope, and improved overall survival and functioning of the neural stem cells.

They were also able to chemically inhibit damage to the nucleus, producing the same results seen with genetic correction.

"This opens the door for drug treatment of Parkinson's disease patients who have this genetic mutation," Belmonte said.

See the original post:
Key player in Parkinson's disease triggered neuron loss pinpointed

To Read More: Key player in Parkinson's disease triggered neuron loss pinpointed
categoriaSkin Stem Cells commentoComments Off on Key player in Parkinson's disease triggered neuron loss pinpointed | dataOctober 20th, 2012
Read All

NeoStem, Inc. Announces the Redemption of the Outstanding 7% Series E Preferred Stock

By raymumme

NEW YORK, Oct. 17, 2012 (GLOBE NEWSWIRE) -- NeoStem, Inc. (NYSE MKT:NBS) ("NeoStem" or the "Company"), an emerging leader in the fast growing cell therapy market, today announced that it will redeem all outstanding shares of its Series E 7% Senior Convertible Preferred Stock ("Series E Preferred Stock").

On October 10, 2012, the Company gave notice to its Series E Preferred Stockholders that it is redeeming all of the outstanding shares of Series E Preferred Stock for an aggregate redemption price of $3.4 million, $2.5 million of which was funded by money placed into escrow when the Series E Preferred stock was issued in November 2010.

"We are pleased that we have been able to redeem this $10 million investment in full over a two year period. Equal to our focus on cell therapy product development and expanding our PCT contract development and manufacturing operations, we are committed to improving our balance sheet. Through the redemption of the Series E Preferred Stock, we will remove a significant overhang and simplify NeoStem's capital structure. The redemption of the Series E Preferred Stock is another example of a step taken by us to improve Common Stockholder value," said Dr. Robin Smith, Chairman and CEO of NeoStem. "We look forward to continued execution on our near term business strategy, including the forthcoming closing of the divestiture of our Erye China pharmaceutical subsidiary."

About NeoStem, Inc.

NeoStem, Inc. continues to develop and build on its core capabilities in cell therapy, capitalizing on the paradigm shift that we see occurring in medicine. In particular, we anticipate that cell therapy will have a significant role in the fight against chronic disease and in lessening the economic burden that these diseases pose to modern society. We are emerging as a technology and market leading company in this fast developing cell therapy market. Our multi-faceted business strategy combines a state-of-the-art contract development and manufacturing subsidiary, Progenitor Cell Therapy, LLC ("PCT"), with a medically important cell therapy product development program, enabling near and long-term revenue growth opportunities. We believe this expertise and existing research capabilities and collaborations will enable us to achieve our mission of becoming a premier cell therapy company.

Our contract development and manufacturing service business supports the development of proprietary cell therapy products. NeoStem's most clinically advanced therapeutic, AMR-001, is being developed at Amorcyte, LLC ("Amorcyte"), which we acquired in October 2011. Amorcyte is developing a cell therapy for the treatment of cardiovascular disease and is enrolling patients in a Phase 2 trial to investigate AMR-001's efficacy in preserving heart function after a heart attack. Athelos Corporation ("Athelos"), which is approximately 80%-owned by our subsidiary, PCT, is collaborating with Becton-Dickinson in the early clinical exploration of a T-cell therapy for autoimmune conditions. In addition, pre-clinical assets include our VSELTM Technology platform as well as our mesenchymal stem cell product candidate for regenerative medicine. Our service business and pipeline of proprietary cell therapy products work in concert, giving us a competitive advantage that we believe is unique to the biotechnology and pharmaceutical industries. Supported by an experienced scientific and business management team and a substantial intellectual property estate, we believe we are well positioned to succeed.

For more information on NeoStem, please visit http://www.neostem.com.

Forward-Looking Statements for NeoStem, Inc.

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect management's current expectations, as of the date of this press release, and involve certain risks and uncertainties. Forward-looking statements include statements herein with respect to the successful execution of the Company's business strategy, including with respect to the Company's or its partners' successful development of AMR-001 and other cell therapeutics, the size of the market for such products, its competitive position in such markets, the Company's ability to successfully penetrate such markets and the market for its contract development and manufacturing ("CDMO") business, and the efficacy of protection from its patent portfolio, as well as the future of the cell therapeutics industry in general, including the rate at which such industry may grow. Forward looking statements also include statements with respect to satisfying all conditions to closing the disposition of Erye, including receipt of all necessary regulatory approvals in the PRC. The Company's actual results could differ materially from those anticipated in these forward- looking statements as a result of various factors, including but not limited to matters described under the "Risk Factors" in the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 20, 2012 and in the Company's other periodic filings with the Securities and Exchange Commission, all of which are available on its website. The Company does not undertake to update its forward-looking statements. The Company's further development is highly dependent on future medical and research developments and market acceptance, which is outside its control.

More here:
NeoStem, Inc. Announces the Redemption of the Outstanding 7% Series E Preferred Stock

To Read More: NeoStem, Inc. Announces the Redemption of the Outstanding 7% Series E Preferred Stock
categoriaUncategorized commentoComments Off on NeoStem, Inc. Announces the Redemption of the Outstanding 7% Series E Preferred Stock | dataOctober 17th, 2012
Read All

New life for the dead: Stem cells from corpse scalp

By raymumme

By Charles Choi, LiveScience contributor

Death will come for us all one day, but life will not fade from our bodies all at once. After our lungs stop breathing, our hearts stop beating, our minds stop racing, our bodies cool, and long after our vital signs cease, little pockets of cells can live for days, even weeks. Now scientists have harvested such cells from the scalps and brain linings of human corpses and reprogrammed them into stem cells.

In other words, dead people can yield living cells that can be converted into any cell or tissue in the body.

As such, this work could help lead to novel stem cell therapies and shed light on a variety of mental disorders, such as schizophrenia, autism and bipolar disorder, which may stem from problems with development, researchers say.

Making stem cells Mature cells can be made or induced to become immature cells, known as pluripotent stem cells, which have the ability to become any tissue in the body and potentially can replace cells destroyed by disease or injury. This discovery was honored last week with the Nobel Prize.

Past research showed this same process could be carried out with so-called fibroblasts taken from the skin of human cadavers. Fibroblasts are the most common cells of connective tissue in animals, and they synthesize the extracellular matrix, the complex scaffolding between cells. [ Science of Death: 10 Tales from the Crypt ]

Cadaver-collected fibroblasts can be reprogrammed into induced pluripotent stem cells using chemicals known as growth factors that are linked with stem cell activity. Reprogrammed cells could then develop into a multitude of cell types, including the neurons found in the brain and spinal cord. However, bacteria and fungi on the skin can wreak havoc on the culturing processes used to grow cells in labs, making the process tricky to successfully carry out.

Now scientists have taken fibroblasts from the scalps and the brain linings of 146 human brain donors and grown induced pluripotent stem cells from them as well.

"We were able to culture living cells from deceased individuals on a larger scale than ever done before," researcher Thomas Hyde, a neuroscientist, neurologist and chief operating officer at the Lieber Institute for Brain Development in Baltimore, told LiveScience. Previous studies had only grown fibroblasts from a total of about a half-dozen cadavers.

The bodies had been dead up to nearly two days before scientists collected tissues from them. The corpses had been kept cool in the morgue, but not frozen.

See original here:
New life for the dead: Stem cells from corpse scalp

To Read More: New life for the dead: Stem cells from corpse scalp
categoriaSkin Stem Cells commentoComments Off on New life for the dead: Stem cells from corpse scalp | dataOctober 16th, 2012
Read All

State licensing hearing for Bonita Springs stem cell doctor to begin Tuesday

By raymumme

The Grekos hearing is scheduled to begin at 9 a.m. Tuesday. The location has changed to the Collier County Courthouse in room 4-D, according to a case filing Monday.

The hearing before J. Lawrence Johnson, an administrative law judge from Tallahassee, will begin at 9 a.m. The hearing is scheduled to last four days. The Collier County Courthouse is located at 3315 U.S. 41 E.

Photo by Allie Garza

Zannos Grekos

BONITA SPRINGS Bonita Springs physician Zannos Grekos, whose license is in jeopardy for controversial stem cell therapy, is getting his day before a judge.

Barring a last-minute delay or settlement, an administrative hearing is scheduled to begin Tuesday in Naples for the 47-year-old. He is fighting to get his license back in good standing from a suspension order, while the state Department of Health is pursuing more discipline and potentially revocation of his license.

Trained as a cardiologist, he's been licensed in Florida since 1996.

The trial-like proceeding, without a jury, is scheduled for four days before an administrative law judge. The proceeding is open to the public. The case against Grekos has garnered considerable media attention, including CNN and inquiries from European media.

A Texas father, Jimmy Bell, will be tracking what happens. Last year, he paid $57,000 upfront for his 5-year-old son, Jason, to undergo stem cell therapy to fight pulmonary hypertension. Despite pleas that his boy was weakening by the day, the treatment was never scheduled and Jason died. Bell received a $10,000 refund.

"He's taking advantage of people and it's more for personal gain," Bell said. "I'd like to see that stopped."

Read more here:
State licensing hearing for Bonita Springs stem cell doctor to begin Tuesday

To Read More: State licensing hearing for Bonita Springs stem cell doctor to begin Tuesday
categoriaUncategorized commentoComments Off on State licensing hearing for Bonita Springs stem cell doctor to begin Tuesday | dataOctober 16th, 2012
Read All

Could Stem Cells Treat Autism? Newly Approved Study May Tell

By raymumme

By Mary Brophy Marcus HealthDay Reporter

FRIDAY, Oct. 12 (HealthDay News) -- Autism researchers have been given the go-ahead by the U.S. Food and Drug Administration to launch a small study in children with autism that evaluates whether a child's own umbilical cord blood may be an effective treatment.

Thirty children with the disorder, aged 2 to 7, will receive injections of their own stem cells from umbilical cord blood banked by their parents after their births. All of the cord blood comes from the Cord Blood Registry, the world's largest stem cell bank.

Scientists at Sutter Neuroscience Institute, in Sacramento, Calif., said the placebo-controlled study will evaluate whether the stem cell therapy helps improve language and behavior in the youngsters.

There is anecdotal evidence that stem cell infusions may have a benefit in other conditions such as cerebral palsy, said lead study investigator Dr. Michael Chez, director of pediatric neurology at the institute.

"We're hoping we'll see in the autism population a group of patients that also responds," Chez said. Other autism and stem cell research is going on abroad, but this study is the first to use a child's own cord blood stem cells.

Chez said the study will involve only patients whose autism is not linked to a genetic syndrome or brain injury, and all of the children will eventually receive the stem cells.

Two infusions will take place during the 13-month study. At the start of the research, the children will be split into two groups, half receiving an infusion of cord blood stem cells and half receiving a placebo. At six months, the groups will swap therapies. The infusions will be conducted on an outpatient basis with close monitoring, Chez said.

"We're working with Sutter Children's Hospital, who does our oncology infusions with the same-age children," he said. "They are very experienced nurses who work with preschool and school-age kids to help them get through medical experiences."

Each child and his or her parents will be given a private room with a television and videos, beverages, and perhaps a visit from the hospital's canine therapy dog, and then a topical anesthetic will be applied to the arm to numb the skin before intravenous needle placement. A hematology expert will be giving the infusions and monitoring for safety, said Chez, who noted that each child will be watched closely for an hour and a half before heading home. They will be seen the next day as well for a safety check.

Link:
Could Stem Cells Treat Autism? Newly Approved Study May Tell

To Read More: Could Stem Cells Treat Autism? Newly Approved Study May Tell
categoriaSkin Stem Cells commentoComments Off on Could Stem Cells Treat Autism? Newly Approved Study May Tell | dataOctober 14th, 2012
Read All

Scientists discuss stem cell discoveries at New York Stem Cell Foundation Conference

By raymumme

Public release date: 11-Oct-2012 [ | E-mail | Share ]

Contact: David McKeon dmckeon@nyscf.org 212-365-7440 New York Stem Cell Foundation

NEW YORK, NY (October 11, 2012) For the second day, The New York Stem Cell Foundation (NYSCF) Seventh Annual Translational Stem Cell Research Conference hosts the world's most preeminent stem cell scientists to present their findings on how advances in stem cell science lead to better treatments and cures for disease and injury. The conference is held at The Rockefeller University in Manhattan on October 10-11.

Today, in disease-specific sessions, scientists will share their latest finds in moving stem cell research to treatments in the following areas: cancer and blood disease; diabetes and autoimmunity; heart and muscles; neurodegeneration and spinal cord injury.

In Cancer and Blood Disease, Elaine Fuchs, PhD, The Rockefeller University, will share findings on identification of skin cancer stem cells, which have implications in understanding other cancers as well as stem cells. Joanne Kurtzberg, MD, Duke University, will discuss her work developing therapies for disease with autologous cord blood transplants. Ravi Majeti, PhD, Stanford University, will describe his recent insights into acute myeloid leukemia and how stem cell technologies can lead to new cancer treatments.

Dieter Egli, PhD, The New York Stem Cell Foundation (NYSCF), will open the session on Diabetes and Autoimmunity by detailing his group's development of stem cell-derived models of pancreatic beta cells for the study of diabetes. Yuval Dor, PhD, Hebrew University, Israel, will discuss experiments with pancreatic beta cells with the goal to understand the regenerative potential of these cells. Matthias von Herrath, MD, Novo Nordisk, will delve into another aspect of Type 1 diabetes, the problem of autoimmunity. He will close the session by sharing insights into the need for an immune modulated therapy to diabetes.

Before the afternoon sessions, Shahin Rafii, MD, Weill Medical College of Cornell University will deliver the first of two keynote addresses of the conference. He will describe his recent successes in deriving vascular cells from amniotic cells.

In the afternoon session on Heart and Muscle Diseases, Amy Wagers, PhD, Harvard University, will focus on advances in treatments and explain how studies into the mechanisms of tissue stem cell renewal may have relevant therapeutic implications. Gordon Keller, PhD, McEwen Centre for Regenerative Medicine, Canada, will describe modeling cardiac cell development from human pluripotent cells for use in toxicology and electrophysiology studies. Helen Blau, PhD, Stanford University, will describe her research to improve stem cell culture in the direction of stem cell fate and for drug screens.

In Neurodegeneration and Spinal Cord Injury, Paola Arlotta, PhD, Harvard University and a NYSCF-Robertson Stem Cell Investigator, will address the application of stem cells to understanding and possibly treating these debilitating diseases and conditions, and will describe investigations to direct reprogramming of neurons into different neuronal lineages. Lorenz Studer, MD, Memorial Sloan-Kettering Cancer Center, will discuss the potential stem cell technology holds in the treatment of Parkinson's disease. Despite past failures in the replacement of lost dopamine neurons, Dr. Studer will describe his novel protocols for the generation of these neurons for eventual use in clinical trials.

Rudolf Jaenisch, MD, The Whitehead Institute, will deliver the second keynote address of the day. Building on Shinya Yamanaka's paradigm-changing work in induced pluripotent stem (iPS) cell reprogramming, Dr. Jaenisch will discuss new methods to counter the generally low successful output of these cells. He will also summarize how targeted genome editing may help unleash the potential of iPS cells and embryonic stem cells for both the study of and therapy for disease.

Go here to read the rest:
Scientists discuss stem cell discoveries at New York Stem Cell Foundation Conference

To Read More: Scientists discuss stem cell discoveries at New York Stem Cell Foundation Conference
categoriaSpinal Cord Stem Cells commentoComments Off on Scientists discuss stem cell discoveries at New York Stem Cell Foundation Conference | dataOctober 12th, 2012
Read All

Robin Roberts returns home from hospital following bone marrow transplant

By raymumme

Robin Roberts has returned home from the hospital, following a bone marrow transplant she received with stem cells from her sister last month.

"There's no place like home. After 30 days in the hospital I'm home," Roberts Tweeted on October 11. "Praise God from whom all blessings flow. Thank YOU and bless YOU."

The 51-year-old "Good Morning America" anchor was being treated for myelodysplastic syndrome (MDS), a rare blood and bone marrow disorder. Roberts revealed her ailment in June, saying it was caused in part by treatments she had undergone for breast cancer five years ago. Her older sister, Sally-Ann, was her bone marrow donor.

Check out 9 facts about Robin Roberts, her MDS and bone marrow transplant.

Roberts went on medical leave a day early than she had initially planned in late August in order to visit her ailing mother, Lucimarian Tolliver Roberts. Lucimarian died on August 30 at the age of 88 and Robin Roberts made it back just in time to see her mother.

In the recent blog post, Roberts detailed her difficulties with chemotherapy and how her co-workers' visit helped lift her spirits.

"Today is what I like to call 'Thankful Thursday, aka Friday Eve,'" Roberts wrote in a post on October 4. "I have been in the hospital 25 days now. My bone marrow transplant took place exactly two weeks ago. The only numbers that matter are my blood counts and they are... GREAT! My sister Sally-Ann's stem cells apparently feel right at home in my body -- an answer to so many prayers."

"My doctors and rock star nurses are very pleased with my progress and I could not be more thankful for the excellent care I am receiving," she added. "I have had some extremely painful days and it's still difficult for me to eat because of all the chemo."

Roberts also mentioned a visit she had with fellow "Good Morning America" co-workers Josh Elliott and Sam Champion, which can be seen in the photo above, as well as an upcoming visit from a childhood pastor.

"I continue to learn so much on this journey, especially when it comes to true friendship and love. My friends near and far -- like Sam and Josh who came to visit yesterday -- have been lifting my spirits," Roberts wrote. "My childhood pastor (who delivered Momma's eulogy) is coming from down South to see me tomorrow. I am hopeful that I MAY be well enough to continue my recovery at home next week and my sisters plan to come back to NYC for that milestone in my journey."

Excerpt from:
Robin Roberts returns home from hospital following bone marrow transplant

To Read More: Robin Roberts returns home from hospital following bone marrow transplant
categoriaBone Marrow Stem Cells commentoComments Off on Robin Roberts returns home from hospital following bone marrow transplant | dataOctober 12th, 2012
Read All

Generation of functional thyroid tissue from stem cells

By raymumme

ScienceDaily (Oct. 11, 2012) The generation of functional thyroid tissue from stem cells could allow the treatment of patients, which suffer from thyroid hormone deficiency due to defective function, or abnormal development of the thyroid gland. The team of Sabine Costagliola at the IRIBHM (Universit Libre de Bruxelles) recently developed a protocol that allowed for the first time the efficient generation of functional thyroid tissue from stem cells in mice and published the results of their studies in the scientific journal Nature.

Thyroid hormones are a class of iodide-containing molecules that play a critical role in the regulation of various body function including growth, metabolism and heart function and that are crucial for normal brain development. The thyroid gland, an endocrine organ that has been specialized in trapping iodide, is the only organ where these hormones are produced. It is, however, of note that one out of 3000 human newborns is born with congenital hypothyroidism, a condition characterized by insufficient production of thyroid hormones. In the absence of a medical treatment with thyroid hormones -- initiated during the first days after birth -- the child will be affected by an irreversible mental retardation. Moreover, a life-long hormonal treatment is necessary in order to maintain proper regulation of growth and general metabolism.

By employing a protocol in which two important genes can be transiently induced in undifferentiated stem cells, the researchers at IRIBHM were able to efficiently push the differentiation of stem cells into thyrocytes, the primary cell type responsible for thyroid hormone production in the thyroid gland.

A first exciting finding of these studies was the development of functional thyroid tissue already within the culture dishes. As a next step, the team of Sabine Costagliola transplanted the stem-cell-derived thyrocytes into mice lacking a functional thyroid gland. Four weeks after transplantation, the researchers observed that transplanted mice had re-established normal levels of thyroid hormones in their blood and were rescued from the symptoms associated with thyroid hormone deficiency. These findings have several important implications. First, the cell system employed by the IRIBHM group provides a vital tool to better characterize the molecular processes associated with embryonic thyroid development. Second, the results of the transplantation studies open new avenues for the treatment of thyroid hormone deficiency but also for the replacement of thyroid tissue in patients suffering from thyroid cancer.

The researchers are currently developing a similar protocol based on human stem cells and explore ways to generate functional human thyroid tissue by reprogramming pluripotent stem cells (iPS) derived from skin cells.

Share this story on Facebook, Twitter, and Google:

Other social bookmarking and sharing tools:

Story Source:

The above story is reprinted from materials provided by Universit Libre de Bruxelles, via AlphaGalileo.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.

Continue reading here:
Generation of functional thyroid tissue from stem cells

To Read More: Generation of functional thyroid tissue from stem cells
categoriaSkin Stem Cells commentoComments Off on Generation of functional thyroid tissue from stem cells | dataOctober 12th, 2012
Read All

NeoStem Announces New Publication That Supports Positive Results of AMR-001 for Treatment of AMI

By raymumme

NEW YORK, Oct. 10, 2012 (GLOBE NEWSWIRE) -- NeoStem, Inc. (NBS), an emerging leader in the fast growing cell therapy market, announced today that a new article published by the International Scholarly Research Network provides further evidence that AMR-001, NeoStem's lead product candidate through its Amorcyte subsidiary, appears capable of preserving heart muscle function following a large myocardial infarction. Amorcyte demonstrated in its Phase 1 trial that AMR-001 preserved heart muscle function when a therapeutic dose of cells was administered. No patient experienced a deterioration in heart muscle function who received 10 million cells or more whereas 30 to 40 percent of patients not receiving a therapeutic dose did. The new study shows that cardiac muscle function sparing effects are evident even earlier after treatment than previously shown.

The article titled "Assessment of myocardial contractile function using global and segmental circumferential strain following intracoronary stem cell infusion after myocardial infarction: MRI Feature Tracking Feasibility Study" by Sabha Bhatti, MD, et al. appears in ISRN Radiology Volume 2013, Article ID 371028 and is published online at http://www.isrn.com/journals/radiology/2013/371028. The publication by Dr. Bhatti and colleagues, including Dr. Andrew Pecora, Chief Medical Officer of NeoStem, supports the finding that AMR-001 preserves heart function. Previously, Amorcyte, a NeoStem subsidiary, showed that six months after STEMI AMR-001 improved blood flow to the heart and preserved heart muscle. By using cardiac magnetic resonance imaging, specifically measuring circumferential strain of the left ventricle, the authors show that AMR-001's effects are evident by three months after STEMI.

AMR-001's angiogenic and anti-apoptotic mechanisms of action indicate that preservation of heart muscle function should start within weeks and be evident in fewer than 6 months. This publication, based on blinded analysis of Amorcyte's Phase 1 data, confirms the expected time course for AMR-001's mechanism of action. In the context of previously published results, these effects are durable.

Amorcyte is developing AMR-001, a cell therapy for the treatment of cardiovascular disease, and is enrolling patients in a Phase 2 trial to investigate AMR-001's efficacy in preserving cardiac function and preventing adverse clinical events after a large myocardial infarction.

About NeoStem, Inc.

NeoStem, Inc. continues to develop and build on its core capabilities in cell therapy, capitalizing on the paradigm shift that we see occurring in medicine. In particular, we anticipate that cell therapy will have a significant role in the fight against chronic disease and in lessening the economic burden that these diseases pose to modern society. We are emerging as a technology and market leading company in this fast developing cell therapy market. Our multi-faceted business strategy combines a state-of-the-art contract development and manufacturing subsidiary, Progenitor Cell Therapy, LLC ("PCT"), with a medically important cell therapy product development program, enabling near and long-term revenue growth opportunities. We believe this expertise and existing research capabilities and collaborations will enable us to achieve our mission of becoming a premier cell therapy company.

Our contract development and manufacturing service business supports the development of proprietary cell therapy products. NeoStem's most clinically advanced therapeutic, AMR-001, as mentioned above, is being developed at Amorcyte, LLC ("Amorcyte"), which we acquired in October 2011. Amorcyte is developing a cell therapy for the treatment of cardiovascular disease and is enrolling patients in a Phase 2 trial to investigate AMR-001's efficacy in preserving heart function after a heart attack. Athelos Corporation ("Athelos"), which is approximately 80%-owned by our subsidiary, PCT, is collaborating with Becton-Dickinson in the early clinical exploration of a T-cell therapy for autoimmune conditions. In addition, pre-clinical assets include our VSELTM Technology platform as well as our mesenchymal stem cell product candidate for regenerative medicine. Our service business and pipeline of proprietary cell therapy products work in concert, giving us a competitive advantage that we believe is unique to the biotechnology and pharmaceutical industries. Supported by an experienced scientific and business management team and a substantial intellectual property estate, we believe we are well positioned to succeed.

Forward-Looking Statements for NeoStem, Inc.

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect management's current expectations, as of the date of this press release, and involve certain risks and uncertainties. Forward-looking statements include statements herein with respect to the successful execution of the Company's business strategy, including with respect to the Company's or its partners' successful development of AMR-001 and other cell therapeutics, the size of the market for such products, its competitive position in such markets, the Company's ability to successfully penetrate such markets and the market for its CDMO business, and the efficacy of protection from its patent portfolio, as well as the future of the cell therapeutics industry in general, including the rate at which such industry may grow. Forward looking statements also include statements with respect to satisfying all conditions to closing the disposition of Erye, including receipt of all necessary regulatory approvals in the PRC. The Company's actual results could differ materially from those anticipated in these forward- looking statements as a result of various factors, including but not limited to (i) the Company's ability to manage its business despite operating losses and cash outflows, (ii) its ability to obtain sufficient capital or strategic business arrangement to fund its operations, including the clinical trials for AMR-001, (iii) successful results of the Company's clinical trials of AMR-001 and other cellular therapeutic products that may be pursued, (iv) demand for and market acceptance of AMR-001 or other cell therapies if clinical trials are successful and the Company is permitted to market such products, (v) establishment of a large global market for cellular-based products, (vi) the impact of competitive products and pricing, (vii) the impact of future scientific and medical developments, (viii) the Company's ability to obtain appropriate governmental licenses and approvals and, in general, future actions of regulatory bodies, including the FDA and foreign counterparts, (ix) reimbursement and rebate policies of government agencies and private payers, (x) the Company's ability to protect its intellectual property, (xi) the company's ability to successfully divest its interest in Erye, and (xii) matters described under the "Risk Factors" in the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 20, 2012 and in the Company's other periodic filings with the Securities and Exchange Commission, all of which are available on its website. The Company does not undertake to update its forward-looking statements. The Company's further development is highly dependent on future medical and research developments and market acceptance, which is outside its control.

See the rest here:
NeoStem Announces New Publication That Supports Positive Results of AMR-001 for Treatment of AMI

To Read More: NeoStem Announces New Publication That Supports Positive Results of AMR-001 for Treatment of AMI
categoriaUncategorized commentoComments Off on NeoStem Announces New Publication That Supports Positive Results of AMR-001 for Treatment of AMI | dataOctober 11th, 2012
Read All

Stem cell therapy a miracle cure? Not quite yet

By raymumme

The techniques pioneered by the winners of this years Nobel Prize in medicine, John B. Gurdon and Shinya Yamanaka, have already allowed scientists to generate stem cells and clone animals.

But it is the potential these discoveries hold that truly boggles the mind. If stem cells the primitive cells that develop into tissue like skin, blood, nerves, muscle and bone can be harnessed, the belief is they can be used as a repair kit for the body.

In theory, a few skin cells could be harvested to rebuild a spinal cord damaged by trauma, to replace brain cells destroyed by dementia, to rebuild heart muscle damaged by a heart attack or to grow a new limb ravaged by diabetes. It is the stuff of science fiction, so close we can taste it.

But these dreams of miracle cures must be tempered with a strong dose of realism.

Despite billions of dollars in investment in research, from government agencies and biotech companies, there is little evidence that stem cell therapies work.

Yes, some hearing has been restored in gerbils and there have been modest improvements in paralyzed lab rats using stem cell treatments, but these are baby steps. In humans, the gains have been far more modest.

We can treat some forms of cancer, like leukemia and multiple myeloma, with stem cell transplants. But this is simply a refinement of an earlier technique, bone marrow transplant. And to perform such a transplant, the immune system must, for all intents and purposes, be destroyed a punishing regime with a significant mortality rate.

It is a far cry from the notion of an injection of magic stem cells that allow people to walk again or restore their memories.

The International Society for Stem Cell Research says that while there are hundreds of conditions that can purportedly be treated with stem cells, the treatments that have actually been shown to be beneficial are extremely limited. Aside from the cancer treatments mentioned above, some bone, skin and corneal conditions have been treated by grafting stem cells, growing them in the lab and transplanting them.

But in all these cases, the stem cells are tissue-specific, meaning the cells are carrying out a function they were designed to do. This is very different from the notion that undifferentiated stem cells can be used to treat a broad range of conditions.(And we wont delve into potential problems, such as rejection and the concern that stem cells could grow out of control and cause cancerous tumours.)

More:
Stem cell therapy a miracle cure? Not quite yet

To Read More: Stem cell therapy a miracle cure? Not quite yet
categoriaSpinal Cord Stem Cells commentoComments Off on Stem cell therapy a miracle cure? Not quite yet | dataOctober 9th, 2012
Read All

Japan, UK scientists win Nobel for stem cell breakthroughs

By raymumme

STOCKHOLM: Scientists from Britain and Japan shared the Nobel Prize in Medicine on Monday for the discovery that adult cells can be reprogrammer back into stem cells which can turn into any kind of tissue and may one day repair damaged organs. John Gurdon, 79, of the Gurdon Institute in Cambridge, Britain and Shinya Yamanaka, 50, of Kyoto University in Japan, discovered ways to create tissue that would act like embryonic cells, without the need to harvest embryos. They share the $1.2 million prize equally. These groundbreaking discoveries have completely changed our view of the development and specialization of cells, the Nobel Assembly at Stockholms Karolinska Institute said in a statement. The big hope for stem cells is that they can be used to replace damaged tissues in everything from spinal cord injuries to Parkinsons disease. All of the tissue in the body starts as stem cells, before developing into mature skin, blood, nerves, muscle and bone. Scientists once thought it was impossible to turn adult tissue back into stem cells, which meant that new stem cells could only be created by harvesting embryos. But Yamanaka and Gurdon showed that development can be reversed, turning adult cells back into cells that behave like embryos. With induced pluripotency stem cells, or iPS cells, ordinary skin or blood cells from adults are transformed back into stem cells which doctors hope will be able to repair damaged organs without being rejected by the immune system. There are concerns, however, that iPS cells could grow out of control and develop into tumors. The eventual aim is to provide replacement cells of all kinds, Gurdons Institute explains on its website. We would like to be able to find a way of obtaining spare heart or brain cells from skin or blood cells. The important point is that the replacement cells need to be from the same individual, to avoid problems of rejection and hence of the need for immunosuppression. Gurdon discovered in 1962 that the specialization of cells could be reversed. In what the prize committee called a classic experiment, he replaced the immature cell nucleus in an egg cell of a frog with the nucleus from a mature intestinal cell. This modified egg cell developed into a normal tadpole, proving that the mature cell still had all the information needed to develop all cells in the frog. More than 40 years later, in 2006, Yamanaka discovered how intact mature cells in mice could be reprogrammer to become stem cells by adding just a few genes. Thanks to these two scientists, we know now that development is not strictly a one-way street, said Thomas Perlmann, Nobel Committee member and professor of Molecular Development Biology at the Karolinska Institute. There is lot of promise and excitement, and difficult disorders such as neurodegenerative disorders, like perhaps Alzheimers and, more likely, Parkinsons disease, are very interesting targets.

Read the original here:
Japan, UK scientists win Nobel for stem cell breakthroughs

To Read More: Japan, UK scientists win Nobel for stem cell breakthroughs
categoriaSpinal Cord Stem Cells commentoComments Off on Japan, UK scientists win Nobel for stem cell breakthroughs | dataOctober 9th, 2012
Read All

Stem-Cell Pioneers Gurdon, Yamanaka Win Nobel Prize

By raymumme

John B. Gurdon transferred DNA between a tadpole and a frog to clone the first animal. Shinya Yamanaka used Gurdons concept to turn ordinary skin into potent stem cells. Both won the Nobel Prize for medicine today.

Gurdon, 79, a researcher at the University of Cambridge in the U.K., and Yamanaka, 50, a professor at Kyoto University in Japan, will share the 8 million-kronor ($1.2 million) prize, the Nobel Assembly said today in Stockholm. The pairs findings have created new opportunities to study diseases and develop methods for diagnosis and therapy, the assembly said in a statement.

Gurdons feat, in 1962, paved the way in 1996 for the cloning of Dolly the sheep and, 10 years later, for Yamanaka, who turned mouse skin cells into stem cells with the potential to become any cell in the body. That achievement was lauded by some politicians and religious figures as a more ethical way to make stem cells because it doesnt destroy human life.

This field has had a long history, starting with John Gurdon, Yamanaka, who was born the same year Gurdon published his achievement, said in an interview on the Nobel Assemblys website. I was able to initiate my project because of his experiments 50 years ago.

Stem cells are found in human embryos and in some tissues and organs of adults, and have the potential to develop into different types of cells. Thats spurred scientists to look at ways of harnessing their power to treat diseases such as Alzheimers, stroke, diabetes and rheumatoid arthritis, according to the U.S. National Institutes of Health.

Gurdon showed that mature cells from specific parts of an animals body retain all the genetic information they had as immature stem cells. He took a cell from a tadpoles gut, extracted the nucleus, and inserted it into the egg cell of an adult frog whose own nucleus had been removed. That reprogrammed egg cell developed into a tadpole with the genetic characteristics of the original tadpole, and subsequent trials yielded adult frogs.

Gurdon overturned the prevailing view that as cells differentiate, they lose genes and their ability to generate other cells of any kind, said Alan Colman, the executive director of the Singapore Stem Cell Consortium, who gained his doctorate under Gurdon at Cambridge.

Hes amazingly passionate, Colman said in an interview before the award was announced. He was the sort of supervisor who you found it difficult to get appointments with, not because he was flying around the world, but because he was doing experiments all the time.

Gurdon was answering e-mails in his laboratory when he received the call from Sweden today about the prize, he said in an interview on the Nobel Assemblys website. His first reaction was, Its amazing if its really true, he said. Could it be that someones pulling your leg? That has happened before.

Gurdon will celebrate at a reception that his institute is hosting today, and then hell be back to work early tomorrow, he said at a London news conference today.

Visit link:
Stem-Cell Pioneers Gurdon, Yamanaka Win Nobel Prize

To Read More: Stem-Cell Pioneers Gurdon, Yamanaka Win Nobel Prize
categoriaSkin Stem Cells commentoComments Off on Stem-Cell Pioneers Gurdon, Yamanaka Win Nobel Prize | dataOctober 9th, 2012
Read All

Blue Spa and Lifeline® Stem Cell Skin Care Pair up to Promote a Beauty Breakthrough and Scientific Approach to Anti …

By raymumme

Skin care meets science for stem cell education and product introduction to the only human and non-embryonic stem cell skin care line of its kind on October 25th, 2012.

Los Angeles, CA (PRWEB) October 08, 2012

Lifeline Skin Care products feature a unique combination of stem cell extracts, vitamins A, B, E, and antioxidants that work synergistically to create new healthy cells. To date, Lifeline is the only skin care line based on human non-embryonic stem cells, which give skin cells the ability to continually proliferate. The result is firmer, smoother, younger and healthier looking skin. Lifeline Skin Care is based on a patented method for ethically extracting growth factors and peptides from young, human stem cells through the use of non-fertilized eggs and never embryos. Stem cell extracts help to increase skins overall thickness, making skin less vulnerable to premature aging.

Independent clinical studies have proven 73% firmer, tighter skin, 93% improved skin hydration, 63% improved skin tone and brightness, and 67% improved appearance of lines and wrinkles with topical use. With benefits boasting similar to those of collagen injections, Lifeline Skin Care offers a collection of formulas for day and night use. Both the Defensive Day Moisturizer Serum SPF 15 and Recovery Night Moisture Serum feature unique combinations of stem cell extract, vitamins A, B, E, and antioxidants.

Stimulating the skins ability to repair itself, these products along with Blue Spa professional procedures and treatments, make a win-win combination for beauty enthusiasts wanting to achieve optimal skincare results. Owner of Blue Spa, Ronda Nofal, recently stated, We are very pleased to be the first Medi Spa in Los Angeles to offer Lifeline@ Skin Care technology to clients. The science and technology behind this product line is far beyond anything else on the market and the results speak for themselves. Our staff has been using these products for the last two months and they have noticed theyre the perfect compliment to any of our facial laser services: IPL (FotoFacial), Laser Genesis, and Titan Skin Tightening. The skin reacts beautifully when paired with dermal fillers, Vitalize Peels, and Micro-dermabrasion as well.

Members of the press and media are invited for early entry on Thursday, October 25th, 2012 between 1-4 pm for Q& A with Lifeline Skin Care expert, Linda Nelson. Additional hours have been arranged for Friday, October 26th, 2012 from 10 am-12 pm. Please directly contact Blue Spa and Lifeline Skin Cares publicity team at Jade Umbrella, to schedule interviews.

About Blue Spa: Opened in October 1999 and former home to the infamous La Reina Theater, Blue Medi Spa is modern luxury spa combining beauty, science, service, and style. Staying ahead of beauty trends and the most effective treatments, highly trained specialists have the knowledge and a decade of experience in lasers (IPL/ Titan/ Laser Genesis/ Zerona), anti-aging skin cocktails, weight loss, non-invasive body contouring, and one-step-ahead aesthetic options. Where feeling blue, never felt better

Website: http://www.bluespa.com.

About Lifeline Skin Care: Developed in 2010 by the International Stem Cell Corporation (http://www.internationalstemcell.com/), while researching cures for diabetes and Parkinsons Disease, a team of biotech scientists discovered a powerful compound for regenerating skin cells. Lifeline Skin Cares goal is to help improve the look and feel of you skin by combining the latest discoveries in the fields of stem cell biology, nanotechnology and skin cream formulation technology to create the highest quality, scientifically tested, and most effective anti-aging products. Revenue helps to fund further research into finding cures and treatments for Diabetes, Parkinsons, Liver, Eye, and other neurological diseases.

Website: http://www.lifelineskincare.com

See the article here:
Blue Spa and Lifeline® Stem Cell Skin Care Pair up to Promote a Beauty Breakthrough and Scientific Approach to Anti ...

To Read More: Blue Spa and Lifeline® Stem Cell Skin Care Pair up to Promote a Beauty Breakthrough and Scientific Approach to Anti …
categoriaSkin Stem Cells commentoComments Off on Blue Spa and Lifeline® Stem Cell Skin Care Pair up to Promote a Beauty Breakthrough and Scientific Approach to Anti … | dataOctober 9th, 2012
Read All

Healthy Mice Created From Skin Stem Cells In Lab

By raymumme

October 5, 2012

Lee Rannals for redOrbit.com Your Universe Online

Japanese scientists reported in the journal Science that they have created life using stem cells made from skin.

The skin cells were used to create eggs which were then fertilized to produce baby mice, who later had their own babies.

The technique has implications that may possibly help infertile couples have children, and maybe could even allow women to overcome menopause.

About one in 10 women of childbearing age face trouble becoming a parent, according to the Centers for Disease Control and Prevention (CDC).

Last year, the scientists at Kyoto University were able to make viable sperm from stem cells. In the more recent study, the team was able to perform a similar accomplishment with eggs.

The researchers used two sources, including those collected from an embryo and skin-like cells, that were reprogrammed into becoming stem cells.

After turning the stem cells into early versions of eggs, they rebuilt an ovary by surrounding the early eggs with other types of supporting cells normally found in an ovary.

They used IVF techniques to collect the eggs, fertilize them with sperm from a male mouse and implant the fertilized egg into a surrogate mother.

Read the original here:
Healthy Mice Created From Skin Stem Cells In Lab

To Read More: Healthy Mice Created From Skin Stem Cells In Lab
categoriaSkin Stem Cells commentoComments Off on Healthy Mice Created From Skin Stem Cells In Lab | dataOctober 6th, 2012
Read All

Japan team offers fertility hope with stem cell eggs

By raymumme

Japanese stem cell scientists raised hopes of a cure for infertility in humans Friday when they announced they had created viable eggs using normal cells from adult mice.

The breakthrough raises the possibility that women who are unable to produce eggs naturally could have them created in a test tube from their own cells and then implanted in their body.

A team at Kyoto University harvested stem cells from mice and altered a number of genes to create cells very similar to the primordial germ cells that generate sperm in men and oocytes -- or eggs -- in women.

They then nurtured these with cells that would become ovaries and transplanted the mixture into living mice, where the cells matured into fully-grown oocytes.

They extracted the matured oocytes, fertilised them in vitro -- in a test tube -- and implanted them into surrogate mother mice.

The resulting mice pups were born healthy and were even able to reproduce once they matured.

Researchers said the findings, published in the US journal Science, provided a promising basis for hope in reproductive medicine.

"This achievement is expected to help us understand further the egg-producing mechanism and contribute to clarifying the causes of infertility," professor Michinori Saito told reporters ahead of publication.

"We intend to continue this research with monkeys and humans," he said.

But Saito cautioned that this was not a ready-made cure for people with fertility problems, adding that a lot of work remained.

Read the original:
Japan team offers fertility hope with stem cell eggs

To Read More: Japan team offers fertility hope with stem cell eggs
categoriaUncategorized commentoComments Off on Japan team offers fertility hope with stem cell eggs | dataOctober 5th, 2012
Read All

Eggs can be created from skin cells

By raymumme

Eggs capable of being fertilised and making babies can be created in the laboratory from skin cells, a study has shown.

Scientists successfully produced three fertile baby mice using the technique, which involves transforming ordinary skin cells into personalised stem cells.

The same Japanese team created viable mouse sperm from embryonic stem cells earlier this year.

Together, both advances greatly increase the likelihood of radical and controversial future treatments for restoring fertility. It could mean creating sperm for men whose fertility has been wiped out by cancer therapy or reversing the menopause in women long after they have used up their natural supply of eggs.

In August, scientists from Kyoto University in Japan announced that they had created sperm cells from mouse embryo stem cells. Injected into mouse eggs, the sperm produced embryos which developed into healthy baby mice.

The same team, led by Dr Katsuhiko Hayashi, carried out the latest research which focused on eggs rather than sperm. The scientists mirrored their earlier achievement by transforming stem cells from mouse embryos into eggs which could be fertilised to produce offspring. But they also took a further step by obtaining mouse pups from eggs derived from ordinary skin cells.

The researchers wrote in the latest online issue of the journal Science: "Our system serves as a robust foundation to investigate and further reconstitute female germline development in vitro (in the laboratory), not only in mice but also in other mammals, including humans."

The "germline" consists of genetic material carried in reproductive cells that can be passed onto future generations.

Dr Allan Pacey, senior lecturer in reproduction and developmental medicine at the University of Sheffield, said: "This is a very technical piece of work which pushes much further the science of how eggs are generated and how we might one day be able to routinely stimulate the new production of eggs for women who are infertile.

"What is remarkable about this work is the fact that, although the process is still quite inefficient, the offspring appeared healthy and were themselves fertile as adults. This is a great step forward but I would urge caution as this is a laboratory study and we are still quite a long way from clinical trials taking place in humans."

Original post:
Eggs can be created from skin cells

To Read More: Eggs can be created from skin cells
categoriaSkin Stem Cells commentoComments Off on Eggs can be created from skin cells | dataOctober 5th, 2012
Read All

Baby Mice Born from Eggs Made from Stem Cells

By raymumme

Mouse pups from induced pluripotent stem cell-derived eggs; image courtesy of Katsuhiko Hayashi

Stem cells have been coaxed into creating everything from liver cells to beating heart tissue. Recently, these versatile cells were even used to make fertile mouse sperm, suggesting that stem cell technology might eventually be able to play a role in the treatment of human infertility.

Now two types of stem cells have been turned into viable mouse egg cells that were fertilized and eventually yielded healthy baby mice. Details of this achievement were published online October 4 in Science.

Mouse oocytes; image courtesy of Katsuhiko Hayashi

Katsuhiko Hayashi, of Kyoto Universitys School of Medicine, were able to create the eggs with embryonic stem cells as well as with induced pluripotent stem cells (formed from adult cells).

The team started with female embryonic stem cells and then coaxed them genetically to revert to an earlier developmental stage (primordial germ cell-like cells). These cells were blended with gonadal somatic cells, important in the development of sexual differentiation, to create reconstituted ovaries. The researchers then transplanted these cultured assemblages into female mice (in either the actual ovary or the kidney) for safekeeping and to allow the stem cells to mature into oocytes in a natural environment.

Healthy adult mice from litter produced from induced pluripotent stem cell-based oocytes; image courtesy of Katsuhiko Hayashi

To test the eggs fertility, the new oocytes were removed from the mice for an in vitro fertilization with mouse spermand then re-implanted into the female mice. The experimental females went on to bear normally developing and fertile offspring. The procedure was then also performed successfully with induced pluripotent stem cells from adult skin cells with similar results.

Our system serves as a robust foundation to investigate and further reconstitute female germline development in vitro, the researchers noted in their paper, not only in mice, but also in other mammals, including humans.

Read the original:
Baby Mice Born from Eggs Made from Stem Cells

To Read More: Baby Mice Born from Eggs Made from Stem Cells
categoriaSkin Stem Cells commentoComments Off on Baby Mice Born from Eggs Made from Stem Cells | dataOctober 5th, 2012
Read All

College student answers growing need for bone marrow transplants

By raymumme

To view our videos, you need to enable JavaScript. Learn how. install Adobe Flash 9 or above. Install now. Then come back here and refresh the page.

DURHAM -- With lives on the line, the need for bone marrow donations across the country is greater than ever.

The National Marrow Donor Program said just five out of 10 patients will receive the transplant they need survive.

Elon University student Donovan Rainey recently passed the exam of a lifetime. He's a donor match for a patient in need of a bone marrow transplant.

"To be able to give life and to be able to try to sustain someone else's is just the ultimate gift," said Rainey.

Giving that gift is easier than before.

Duke University Medical Center said many are under the false impression that the only way to donate is by surgericaly removing bone marrow from the hip.

Instead, donors can get blood removed through a machine. The stem cells found in donors blood will be used to create a new immune system for recipients.

"They don't need general anesthesia, they don't have to go to the operating room and I think there is less discomfort," said Susan Dago, a nurse at Duke's Blood and Marrow Transplant Clinic and Treatment Facility.

Rainey said the temporary discomfort is worth it because the life on the line was his dad's.

More:
College student answers growing need for bone marrow transplants

To Read More: College student answers growing need for bone marrow transplants
categoriaBone Marrow Stem Cells commentoComments Off on College student answers growing need for bone marrow transplants | dataOctober 4th, 2012
Read All

Page 32«..1020..31323334..40..»


Copyright :: 2024