A new study from Swedish researchers challenges the idea that stem cells can be used to treat female infertility by producing new egg cells.
Scientists have long hoped that stem cells could help women struggling with infertility. Since 2004, some studies have claimed that egg stem cells exist in both mice and humans. One U.S. company, OvaScience, even launched a treatment based on this idea.
However, a new study published in Nature Medicine raises serious doubts. The research was led by Professor Kui Liu from the University of Gothenburg and Professor Outi Hovatta from the Karolinska Institute.
Professor Liu explained that the method used to isolate the so-called egg stem cells is not specific enough. He also stated that these cells have not successfully developed into real eggs.
“As a result, it’s not realistic to expect a new infertility treatment from stem cells,” Liu said. “Many investors have been excited by this idea, but our research and that of others show that these are not true stem cells. We believe such treatments are unreliable.”
Professor Hovatta, an expert in stem cell research, agrees. She believes the reported egg stem cells in both mice and humans are not functional.
“This is about responsible science,” Liu added. “We must avoid giving patients and society false hope. The hype needs to slow down. We are warning against making promises before we have solid evidence.”
The researchers urge caution in promoting unproven treatments, especially those that could raise unrealistic expectations among patients and investors.
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