LONDON, August 23 (SPIS MedWire)Laboratory-grown neuronal cells have been transplanted into the brains of stroke victims in an attempt to reverse stroke damage. Researchers from the University of Pittsburgh Medical School gave transplants to 12 people who had suffered a stroke six months to six years previously (Neurology 2000, 55:565-569). They all had impaired mobility and in some cases a leg or arm was paralysed. Two million or six million neuron cells were transplanted into three sites within and around the stroke-damaged areas of the brain. The cells — LBS-Neurons — originated from human tumour tissue composed of embryonic-like cells that had undergone chemical treatment so that they divided rapidly into fully differentiated, non-dividing neurons. None of the patients experienced complications related to the transplant and six of the 12 showed substantially improved motor skills. Positron emission tomography scans also provided evidence that the transplanted cells...