Not to be outdone by Geron Corp., the company he helped found, Advanced Cell Technology Inc. President and CEO Michael West last week announced that Advanced Cell had generated cells resembling embryonic stem cells from a human cell fused with an enucleated cow egg cell.

The cloning process is similar to nuclear transfer, and like GERN's isolation of human ES cells is likely to raise more ethical questions than near-term opportunities for commercialization (see BioCentury, Nov. 9).