Scientists Report Advance in Therapeutic Cloning
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Contributed by William Angelos| 14 December, 2004 03:04 GMT
Scientists have taken a significant step toward successful therapeutic cloning of nonhuman primate embryos. Researchers at the University of Pittsburgh used new cloning techniques -- including a method developed earlier this year in South Korea known as the "gentle squeeze" -- to clone primate embryos to the blastocyst stage.
The blastocyst stage is a developmental step in which the embryo resembles a hollow, fluid-filled cavity surrounded by a single layer of cells. Called the inner cell mass, this layer contains embryonic stem cells. Growth of a cloned nonhuman primate egg to the blastocyst stage is farther along the developmental spectrum than ever achieved before, Gerald Schatten, Ph.D., director of the Pittsburgh Development Center at Magee-Womens Research Institute, and his colleagues report.
Therapeutic Cloning and Embryonic Stem Cells
Calvin Simerly, Ph.D., associate professor of obstetrics, gynecology and reproductive sciences at the University of Pittsburgh School of Medicine and the study |
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