Stem cells: the first human trial

People suffering from a form of incurable blindness could soon become the first patients in the world to benefit from a new and controversial transplant operation using stem cells derived from spare human embryos left over from IVF treatment.

Scientists working for an American biotechnology company yesterday applied for a licence to carry out a clinical trial on patients in the US suffering from a type of macular degeneration, which causes gradual loss of vision. They expect the transplant operations to begin early in the new year.

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