Embryonic stem cells (ESCs), derived from the blastocyst stage of early mammalian embryos, are distinguished by their … 展开

According to a 2002 article in PNAS, "Human embryonic stem cells have the potential to differentiate into various cell types, and, thus, may be useful as a source of cells for transplantation or tissue engineering." … 展开

The major concern with the possible transplantation of ESCs into patients as therapies is their ability to form tumors including teratomas. Safety issues prompted the FDA to place a hold on the first ESC clinical … 展开

• 1964: Lewis Kleinsmith and G. Barry Pierce Jr. isolated a single type of cell from a teratocarcinoma, a tumor now known from a germ cell. These cells were isolated from the teratocarcinoma replicated and grew in cell culture as a … 展开

In vitro fertilization generates multiple embryos. The surplus of embryos is not clinically used or is unsuitable for implantation into the patient, and therefore may be donated by the donor with consent. Human embryon… 展开