title: Functional recovery from sciatic nerve crush injury is delayed because of increased distal atrophy in mice lacking the p75 receptor.
abstract: Peripheral nerve injuries are becoming more common, but without effective treatment, the outcome is often very poor. Recent research shows that p75 plays an important role in nerve regeneration, but its mechanisms of action during behavioral recovery and axon regrowth remain unclear. To investigate these mechanisms, we examined recovery from sciatic nerve crush injury in wild-type and p75 knockout mice. We found that sciatic nerve crush injury upregulates mRNA and protein expressions of p75 and p75 deficiency alters gene and protein expression of molecules associated with distal portion atrophy. However, p75 deletion did not alter gene and protein expression in the spinal cord of molecules related to neuronal intrinsic growth capacity. Behavioral testing showed that functional recovery was delayed in mice lacking p75. These results suggest that p75 regulates gene and protein expression that limits the distal atrophy after sciatic nerve injury, thereby regulating axonal growth and functional recovery.
authors.affiliation: Departments of aNeurology bCritical Care Medicine, Linyi People's Hospital Affiliated to Shandong University, Linyi cDepartment of Neurology, the Second Hospital Affiliated to Shandong University, Jinan, China.
authors.forename: Xiaojuan
authors.initials: X
authors.lastname: Chen
authors.forename: Jianguo
authors.initials: J
authors.lastname: Zhang
authors.forename: Xianjun
authors.initials: X
authors.lastname: Wang
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Bi
mesh_terms: D000818:Animals; D001284:Atrophy; D001522:Behavior, Animal; D008297:Male; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D009416:Nerve Regeneration; D059348:Peripheral Nerve Injuries / Q000378:metabolism* / Q000473:pathology; D012333:RNA, Messenger; D020800:Receptor, Nerve Growth Factor / Q000235:genetics / Q000378:metabolism*; D020127:Recovery of Function; D012584:Sciatic Nerve / Q000378:metabolism* / Q000473:pathology; D015854:Up-Regulation
chemical_list: D012333:RNA, Messenger; D020800:Receptor, Nerve Growth Factor