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Mouse conditional knockout for Isl1 gene showed a loss of the nociceptive markers TrkA, TrkB and Runx1 and a near absence of cutaneous innervation, an excess of cell apoptosis, a ganglion size markedly diminished, a profound loss of cutaneous innervation. Mouse Isl1 CKO exhibits rofound deficits in the sensory innervation of the CNS and periphery, extensive changes in sensory gene expression, and markedly increased sensory apoptosis, with relative sparing of proprioceptor neuron (Sun et al, 2008) |