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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Prevention of natural motoneurone cell death by dibutyryl cyclic GMP.

Natural neuronal cell death is a well-described developmental phenomenon common to many nerve centres in a variety of animal species. Neuronal survival has been shown to depend on the presence and size of the available target tissue and it has been suggested that neuronal survival is dependent on successful competition for either a limited number of synaptic sites or a limited amount of trophic factor(s). In the lateral motor column of the lumbar spinal cord in the chick embryo, the period of axon elongation and innervation of the periphery has been shown to precede that of natural motoneurone cell death. While muscle contractile activity appears to regulate the extent of motoneurone death, to date the intracellular molecular events that initiate and regulate the developmental process of natural neuronal cell death or, more importantly, neuronal survival are unknown. Our earlier studies suggested that either contact or association between spinal cord processes and muscle cells during neuromuscular junction formation in vivo leads to an increase in cyclic GMP in whole spinal cord. We now show that treatment of chick embryos with the membrane-permeable cyclic GMP analogue, dibutyryl cyclic GMP during the period of natural motoneurone cell death prevents greater than 58% of natural motoneurone cell death in the lumbar lateral motor column.[1]

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