The Evolving Science of Cancer Stem Cells by Carmen Phillips, NCI Cancer Bulletin 2010(Jul 27); 7(15). Excerpt:

Researchers from Stanford University earlier this month reported in Nature that they had found a marker, CD271, that identified a somewhat unique population of cells that could produce melanoma in highly immunocompromised mice; anywhere from 2.5 percent to 41 percent of cells in their human tumor samples expressed the marker. In additional experiments using similar mice on which human skin was engrafted, only tumor cells with the marker could produce tumors and metastases in the mice. (In his lab, Dr. Morrison noted, the same marker did not differentiate tumor-forming from nontumor-forming cells.)

The publication about CD271 is: Human melanoma-initiating cells express neural crest nerve growth factor receptor CD271 by Alexander D Boiko and 11 colleagues, Nature 2010(Jul 1); 466(7302): 133-7. [PubMed citation].

Comments: The sentence: "In his lab, Dr. Morrison noted, the same marker did not differentiate tumor-forming from nontumor-forming cells" is noteworthy. Why the difference in results for CD271?

The publication by Boiko and co-authors was cited in a previous post to this blog, "Melanoma-initiating cells identified", dated July 1, 2010.

See also an earlier post to this blog, "Tumorigenic cells not rare in human melanoma", dated December 3, 2008.

International Stem Cell Corporation (OTCBB:ISCO), http://www.internationalstemcell.com, via its wholly-owned subsidiary, Lifeline Cell Technology® (Lifeline) http://www.lifelinecelltech.com, and Sristi Biosciences, http://www.sristibio.com, have entered into a distribution agreement for the Lifeline® brand of human cell culture products in India.

Lifeline specializes in development, manufacture and distribution of primary human cells and media and growth factors for optimized culturing of cells, including stem cells. These products are being requested by customers internationally, including in India, which represents one of the fastest growing markets for products of this kind.

According to Lifeline's CEO and SVP of Operations at ISCO, Jeffrey Janus, 'Sristi Biosciences is part of one of the most experienced biotechnology companies in India and the first to advance cell therapy into human trials in that country. Their network among academic and corporate researchers and experience and capacity to import and handle primary cell cultures, media and growth factors in India will be highly valuable for Lifeline to continue the international commercial expansion of its brand.'

Lifeline's scientists have over 20 years of experience developing products for the culture of human cells. The company has made significant contributions to the creation and standardization of human cell systems used today for clinical applications and in academic, government and pharmaceutical research laboratories. The group sells over 75 standardized products directly and via its distributors in the US and abroad. It also engages in customized product development for its largest customers.

Dr. Sudhir Reddy, Sristi Biosciences' CEO adds, 'We are pleased to be the first company to introduce the Lifeline products to the growing Indian research market. Our cell culture experience and broad market reach in India will benefit the brand and help Sristi Biosciences further accelerate its commercialization and corporate growth in the biomedical field.'

ISCO recently announced the beginning of a collaboration on its human corneal tissue, CytoCor™, with leading Indian eye hospital and research center, Sankara Nethralaya, and Letter of Intent with Insight Bioventures India (IBVI) to seek funding and establishment of development and manufacturing operations for ISCO's research and pharmaceutical products in India (ISCO India), including the Lifeline products and CytoCor.

'The Lifeline distribution agreement with Sristi Biosciences is central to ISCO's international expansion. Besides facilitating commercialization of the Lifeline products in India, Sristi Biosciences' cell therapy development, regulatory and manufacturing expertise will be important as ISCO and IBVI seek to establish ISCO India with cost-efficient development and manufacturing of research and pharmaceutical products for the Indian and broader Asian markets,' says Brian Lundstrom, ISCO's President.

ABOUT INTERNATIONAL STEM CELL CORPORATION (ISCO.OB)

International Stem Cell Corporation is a California-based biotechnology company focused on therapeutic and research products. ISCO's core technology, parthenogenesis, results in creation of pluripotent human stem cells from unfertilized oocytes (eggs). These proprietary cells avoid ethical issues associated with use or destruction of viable human embryos and, unlike most other major stem cell types, can be immune matched and be a source of therapeutic cells with minimal rejection after transplantation into hundreds of millions of individuals of differing racial groups. ISCO also produces and markets specialized cells and growth media for therapeutic research worldwide through its subsidiary, Lifeline Cell Technology, and is developing a line of cosmeceutical products via its subsidiary, Lifeline Skin Care. ISCO is advancing novel human stem cell-based therapies where cells have been proven to be efficacious but traditional small molecule and protein therapeutics have not. More information is available on ISCO's website.

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ABOUT SRISTI BIOSCIENCES

Sristi Biosciences Private Limited is a result of twelve years of research and corporate development in the therapeutic space and is the healthcare component of leading biotechnology group, SRI Biotech, in India. Sristi Biosciences' two main divisions include Tissue Engineering and Cell Therapy that has pioneered chondrocytes-based cell therapy in India and Drug Discoverythat covers the Indian research product market with natural compound libraries, molecular diagnostics and markers, informatics and cell-based products. Sristi's integrated research and development facility in Hyderabad is state-of-the-art and the company has wide collaborative and commercial presence across the research market in India, including 23 leading biotech institutes and major corporate bodies.

FORWARD-LOOKING STATEMENTS

Statements pertaining to anticipated developments and therapeutic applications, the potential benefits of collaborations, affiliations, and other opportunities for the company and its subsidiaries, along with other statements about the future expectations, beliefs, goals, plans, or prospects expressed by management constitute forward-looking statements. Any statements that are not historical fact (including, but not limited to statements that contain words such as "will," "believes," "plans," "anticipates," "expects," "estimates,") should also be considered to be forward-looking statements. Forward-looking statements involve risks and uncertainties, including, without limitation, risks inherent in the development and/or commercialization of potential products and the management of collaborations, uncertainty in the results of clinical trials or regulatory approvals, need and ability to obtain future capital, application of capital resources among competing uses, and maintenance of intellectual property rights. Actual results may differ materially from the results anticipated in these forward-looking statements and as such should be evaluated together with the many uncertainties that affect the company's business, particularly those mentioned in the cautionary statements found in the company's Securities and Exchange Commission filings. The company disclaims any intent or obligation to update forward-looking statements.

Key Words: Stem Cells, Biotechnology, Parthenogenesis

International Stem Cell Corporation
Kenneth C. Aldrich, Chairman
760-940-6383
kaldrich@intlstemcell.com
Or
Brian Lundstrom, President
760-640-6383
bl@intlstemcell.com

Here are the secrets your dentist may not want you to know -- but you need to know to get the best care possible:
Secret #1: Your dentist may not be as educated as you think.

Dentistry has changed a lot since your dentist graduated from dental school. There have been major advances in most materials used in fillings, bonding and root canals. If your dentist is not actively engaged in continuing education, it is unlikely that he or she is keeping up with these developments.

Secret #2: Your dentist may not have the latest technology.

Digital x-ray: Dentists who do not have digital x-ray equipment are practicing in the dark ages. Digital x-rays use less radiation than film. They are easier to read and the ability to manipulate contrast makes diagnosis more accurate.

Ultrasonic Cleaning: Ultrasonic instruments vibrate plaque and calculus off your teeth, even in areas below your gums. It is much more comfortable than old-fashioned hand scraping. Read more...

Detox cleansing

Researchers Study Cancer Stem Cells as Therapeutic Targets for Mesothelioma, Asbestos.com, July 26, 2010. Excerpt:

In a study published in the International Journal of Oncology, Cortes-Dericks and colleagues tested whether cancer stem cells in malignant pleural mesothelioma express resistance to cisplatin and pemetrexed, two chemotherapy drugs commonly used to treat mesothelioma cancer.

This news item is based on the OA publication entitled: Putative cancer stem cells in malignant pleural mesothelioma show resistance to cisplatin and pemetrexed by Lourdes Cortes-Dericks, Giovanni L Carboni, Ralph A Schmid and Golnaz Karoubi, Int J Oncol 2010(Aug); 37(2): 437-44. [PubMed citation].

Gamma-Tocotrienol Kills Prostate Cancer Stem Cells, PRNewswire, July 25, 2010. Excerpt:

The scientists found that low doses of gamma-tocotrienol cause apoptosis in the prostate cancer stem cells and suppress their colony formation capability. This results in a lower prostate cancer stem cell population (as defined by the protein markers CD133 and CD44). Further tests in mice models were conducted, where mice implanted with hormonal refractory prostate cancer cells were given gamma-tocotrienol orally. The results showed that gamma- tocotrienol not only reduced tumour size formed, but also decreased the incidence rate of tumour formation by 75%, as compared to the control group of mice, which had 100% tumour formation. These results strongly suggest that gamma-tocotrienol could be developed for prostate cancer prevention and treatment.

The news release by Davos Life Science is based on the publication:

Gamma-tocotrienol as an effective agent in targeting prostate cancer stem cell-like population by Sze Ue Luk and 11 co-authors, including Ming-Tat Ling, Int J Cancer 2010(Jul 8) [Epub ahead of print][PubMed citation].

Comment:

See also a relevant patent application: (WO/2010/047663) Use of Tocotrienol Composition for the Prevention of Cancer.
Publication Date: 29.04.2010
Applicants: DAVOS LIFE SCIENCE PTE. LTD. [SG/SG]; 16 Tuas South Street 5 Singapore 637795 (SG) (All Except US).
LING, Ming Tat [CN/AU]; (AU) (US Only).
YAP, Wei Ney [MY/SG]; (SG) (US Only).
WONG, Yong Chuan [MY/CN]; (CN) (US Only).
YAP, Yee Leng, Daniel [MY/SG]; (SG) (US Only).

Irradiating brain's stem cell niche doubles survival time for patients with brain cancers by Kim Irwin, News Release, UCLA Newsroom, July 23, 2010. Excerpt:

Patients with deadly glioblastomas who received high doses of radiation that hit a portion of the brain which harbors neural stem cells had double the progression-free survival time as patients who had lower doses or no radiation targeting the area, a study from the radiation oncology department at UCLA's Jonsson Comprehensive Cancer Center has found.

The news release is based on this OA publication: Irradiation of the Potential Cancer Stem Cell Niches in the Adult Brain Improves Progression-free Survival of Patients with Malignant Glioma by Patrick Evers and 6 co-authors, including Frank Pajonk, BMC Cancer 2010(Jul 21); 10(1):384. [Epub ahead of print][FriendFeed entry].

Comment: On the brain as a model system to study the impact of radiation dose given to stem cell niches. Provides clinical evidence, based on an improvement in progression-free survival, to support the hypothesis that higher radiation doses to neural stem cell (NSC) niches improves patient survival by eradicating CSCs.