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The potential utility of cultured neuroblastoma cells as donor tissue for neural implants into the mammalian brain has been examined. Cells from a human neuroblastoma cell line, IMR-32, were labeled with [3H]thymidine and chemically rendered amitotic. These differentiated IMR-32 cells were grafted into the hippocampi of five adult African Green monkeys, and graft survival was evaluated for up to 270 days after transplantation. Autoradiographically labeled grafted cells were identified in four animals. Processes from grafted cells could be followed for distances of up to 150 micrometers into the host brain. No evidence for neoplastic growth of the transplant was found. Thus, grafted neuroblastoma cells can survive for prolonged periods in the primate brain and may serve as a practical source of donor tissue for neural implants. [ABSTRACT FROM AUTHOR]

The article presents an abstract of the medical research paper "Participation of Par-4 in Degeneration of Dopaminergic Neurons in Models of Parkinson's Disease," which will be presented in the 30th meeting of the American Society for Neurochemistry, to be held in New Orleans, Louisiana. The research examines the role of Par-4, a 38 kDa protein, in oxidative stress and mitochondrial dysfunction.