Chinese scientists have reported developing stem cells from pigs that could be used in human ailments.

From the article in the New York Daily News:

This is the first time scientists were able to successfully transform adult cells from animals into stem cells, said Dr. Lei Xiao, who led the research team. Cells taken from a pig's ear and bone marrow "changed and developed in the laboratory into colonies of embryonic-like stem cells," the researchers reported in the Journal of Molecular Cell Biology. Embryonic stem cells can then develop into any type of cell in the human body.