Scientists Turn Skin Cells into Healthy Heart Cells
By raymumme
Dr. John D. Cunningham / Getty Images
In a medical first, scientists in Haifa, Israel, took skin cells from two heart failure patients and reprogrammed them into stem cells that generated healthy, beating heart muscle cells in the lab. Though human testing is likely a decade off, the hope is that such cells can be used to help people with heart failure repair their damaged hearts with their own skin cells.
In the current study, scientists first mixed the newly developed heart cells with pre-existing heart tissue within days, the cells were beating together. The heart tissue was then transplanted into rats, where it integrated with the rats healthy heart cells.
What is new and exciting about our research is that we have shown that its possible to take skin cells from an elderly patient with advanced heart failure and end up with his own beating cells in a laboratory dish that are healthy and young the equivalent to the stage of his heart cells when he was just born, says lead researcherDr. Lior Gepstein, a senior clinical electrophysiologist at Rambam Medical Center in Israel, said in a statement.
The researchers were pleased to find that the cells made from the two heart failure patients, ages 51 and 61, generated heart muscle cells that were just as effective as those developed from healthy, young controls.
(MORE: Study During Beijing Olympics Shows How Pollution Harms the Heart)
If the technology works in human hearts, it could potentially prevent problems of immune rejection, since the cells would be the patients own. It would also avoid the moral issues surrounding the use of embryonic stem cells, since such reprogrammed stem cells or human induced pluripotent stem (iPS) cells do not use embryos.
But its still too early to predict whether the procedure could be successful humans. The new study involved cells from only two patients and were transplanted only into healthy animals. The authors note that human clinical trials are likely at least five or 10 years away. Further, creating iPS cells is not an easy or efficient process; its not clear whether enough cells could be made quickly enough to repair the broad-scale damage that occurs after a heart attack.
Reprogramming skin cells to become stem cells also introduces the potential for the cells to grow out of control and become cancerous. The Israeli researchers took additional steps removing certain transcription factors and viral factors to reduce the risk of cancer. But these hurdles would have to be revisited if the technique is tested in human patients.
This is an interesting paper, but very early and its really important for patients that the promise of such a technique is not oversold, John Martin, a professor of cardiovascular medicine at University College London, told Reuters.The chances of translation are slim and if it does work it would take around 15 years to come to clinic.
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Scientists Turn Skin Cells into Healthy Heart Cells
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