OvaScience™, a fertility company focused on the discovery, development and commercialization of novel treatments for infertility, today announced the publication of results demonstrating that ovaries of reproductive-age women possess egg precursor cells that can mature into eggs. These studies were published today in the Advanced Online Publication of the journal Nature Medicine and confirm the identity of these egg precursor cells, which were initially reported in the journal Nature in 2004 by Jonathan Tilly, Ph.D., co-founder of OvaScience, director of the Vincent Center for Reproductive Biology, chief of research for Massachusetts General Hospital (MGH) Vincent Department of Obstetrics and Gynecology and professor, Department of Obstetrics, Gynecology and Reproductive Biology at Harvard Medical School (HMS).
“This research conducted by Dr. Tilly and his team at MGH, and exclusively licensed by OvaScience, has the potential to enable the development of new treatment options for infertility”
In this newly published study, Dr. Tilly and his colleagues developed a strategy to purify egg precursor cells from ovaries of adult female mice and ovaries from reproductive-age women. Reintroduction of mouse egg precursor cells back into adult mouse ovaries led to the maturation of new eggs that could be ovulated and fertilized to yield healthy embryos. Parallel studies conducted with human egg precursor cells confirmed that these cells, like their mouse counterparts, could mature into eggs. The maturation took place by reintroducing the human egg precursor cells into human ovarian tissue that was grafted into female mouse hosts. These mice were lacking a functional immune system in order to prevent rejection of the tissue.