Scientists identify “nave-like” human stem cell
Posted: October 16, 2014 at 7:55 pm
9 hours ago by Vicky Just Naive-like stem cells could potentially be used to treat dementia or reduce organ transplants
Scientists from our university and Berlin have identified a type of human stem cell that appears to be "nave-like" able to develop into any type of cell. The discovery of this cell type could potentially have a large impact on our understanding of how humans develop and on the field of regenerative medicine.
The human embryonic stem cells (ESCs) that scientists currently study in the lab are able to develop into several different types of cell but are already pre-determined to some extent.
Published in the top scientific journal Nature, researchers from the Max Delbrck Centre for Molecular Medicine (MDC), Berlin, Germany and our university have for the first time discovered human ESCs that appear to behave like "nave" cells able to develop into any type of cell.
These nave-like cells, only previously found in mice, are easy to grow in the lab and could have huge potential for regenerating damaged tissues in the body, potentially leading to treatments for diseases such as dementia or reducing the need for organ transplantation.
Professor Laurence Hurst from our Department of Biology & Biochemistry and a co-author of the study explained: "Most stem cells are primed to some extent to become a certain type of cell. If you use the analogy of a train network, these cells are like one of the main London stations. Trains from Paddington can go to Cardiff or Exeter, but not to Norwich. In the same way, these cells can develop into a fixed number of different cell types.
"However the nave-like cells we've identified are like a central terminus; they are present earlier in the embryo's development and so we think their fates can go in any direction and become any type of cell."
Co-investigator Dr Zsuzsanna Izsvk, (MDC, corresponding author) said: "We were very excited by this discovery it was one of those Eureka moments that rarely happens in science."
The Bath and Berlin team found the nave-like cells by looking at which genes were expressed in very early human embryos. They pinpointed a virus called human endogenous retrovirus H (HERVH) that has become integrated into human DNA and was very highly expressed at just the right time and place in human embryos, where they would expect to see nave-like cells if they existed.
They identified a protein called LBP9, which is essential for the activity of HERVH in early embryos. Using a reporter system that made cells expressing HERVH via LBP9 glow green, the Berlin and our team found that they had purified cells that showed all of the hallmarks of a mouse nave cell.
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Scientists identify "nave-like" human stem cell
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