Scientists have used stem cells to create structures that resemble human embryos in the lab, in a first that has prompted calls for stricter regulation in the rapidly advancing field.
Several different labs around the world have released pre-print studies in the past seven days describing their research, which experts said should be treated with caution as the research has not yet been peer-reviewed., which can become any type of cell, to self-assemble into a structure that resembles an embryo—without needing sperm, an egg or fertilization.
The first announcement was last Wednesday, when Magdalena Zernicka-Goetz of Cambridge University and the California Institute of Technology described her team's work at the International Society for Stem Cell Research'sOn Thursday, the team of Jacob Hanna at the Weizmann Institute of Science in Israel published a pre-print study detailing their own work on stem cell-based human embryo models.of their own, giving more information.
Within a few weeks of each other in August last year, both the Zernicka-Goetz and Hanna teams published papers about their work creating the first embryo-like structures usingBoth teams told AFP that their new studies had been accepted by prestigious peer-reviewed journals—and that they had presented their work at conferences months before the recent media attention.Dr Jacob Hanna working at Israel's Weizmann Institute of Science last year.
Other researchers seemed to agree that Hanna's models were more advanced, also praising his team for using only chemical and not genetic modifications to coax the cells into embryo-like structures.
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