Fish Found to Regenerate Heart Tissue

Zebrafish have a very valuable ability they can repair up to 20 percent of their heart muscle within weeks of sustaining damage. One researcher believes the heart-mending ability is due to the presence of a protein called thymosine beta-4, which stimulates the growth of new blood vessels and heart tissue. When zebrafish heart tissue is damaged, a blood clot is generated to stop bleeding around it. Then the clot is engulfed by the covering to the heart, which stimulates the regeneration of the area with the damaged tissue. Eventually, the new tissue is integrated back into the entire heart. They dont only regrow heart tissue, however. It has been observed they also can regenerate fins, skin and eye cells.Many, if not most, Care2 members are adamantly opposed to using animals in medical research, so some may not be happy to learn that a medical research foundation is studying zebrafish in hopes of finding a way of repairing human hearts as well. They are investing millions in the study of regenerative medicine, including investigating the heart function of zebrafish. The small translucent fish have two-chambered hearts, instead of four like humans, but they also have a backbone like we do, which means they are more closely related than some other research subjects like worms, so studying them may yield knowledge relevant to our own health.The British Heart Foundation envisions a time when new medications might be able to regrow damaged heart tissue, instead of having to resort to transplants or implants. The zebrafish does not use stem cells, what it uses are its own adult heart cells, which are able to divide and then re-accumulate together to form a new beating heart. And there is some interest in British Heart Foundation funded researchers that looking at cells that human hearts have that sit outside of the heart, that they might have the ability to become adult heart cells, said Peter Weissberg, medical director, British Heart Foundation. (Source: Ibnlive.com)Zebrafish are found natively in the f! reshwate r bodies of India, Pakistan, Bangladesh, Nepal, and Myanmar. Related:
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