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Whole organ 'grown' inside animal for the first time

Wednesday, Aug 27, 2014 - 01:56

Scientists in the UK have successfully grown a fully functional organ inside a living animal by transplanting cells grown in a laboratory. The researchs marks the first time a living organ has been created outside the body. Researchers from the MRC Centre for Regenerative Medicine at the University of Edinburgh hope their study will pave the way for similar techniques to be used in humans in future. Matthew Stock reports.

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STORY: Scientists in Scotland say they have grown a whole, fully functional organ inside a living animal for the first time. The team from the University of Edinburgh's Centre for Regenerative Medicine produced a working thymus - an organ found in front of the heart that produces T cells, crucial to the immune system. Professor Clare Blackburn who led the research said her team used a technique called 'reprogramming' to turn fibroblast cells taken from a mouse embryo into a type of cell found in the thymus. (SOUNDBITE) (English) PROFESSOR CLARE BLACKBURN, FROM THE MRC CENTRE FOR REGENERATIVE MEDICINE AT THE UNIVERSITY OF EDINBURGH, SAYING: "We tested what would happen if we forced them to express the single gene which is not normally turned on in these in fibroblast cells... they started to adopt a shape that is more typical of thymus cells. Moreover, when we tested them further, it turned out that they had started to express other genes which are normally only found in the thymus and have very key roles in allowing the thymus to support T cell development." These 'reprogrammed' cells were mixed with other key thymus cell types. When transplanted into a mouse, the cells - shown here on the right - formed a replacement thymus with the same structure and function as a healthy thymus. Professor Blackburn hopes the breakthrough will pave the way for similar techniques to eventually be used in humans. (SOUNDBITE) (English) PROFESSOR CLARE BLACKBURN, FROM THE MRC CENTRE FOR REGENERATIVE MEDICINE AT THE UNIVERSITY OF EDINBURGH, SAYING: "What we imagine is that these thymus cells that we've been able to make by reprogramming of a different cell type in the lab could be a very readily available source of cells which could form the basis of thymus transplantation approaches." It's the shrinking of the thymus that contributes to the immune system becoming less effective as we age. And people born with thymus disorders are often limited by a lack of donors for transplants and problems matching tissue to the recipient. Blackburn says that in the future -- her lab grown cells could form the basis of new thymus treatments for people with a weakened immune system.

Whole organ 'grown' inside animal for the first time

Wednesday, Aug 27, 2014 - 01:56

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