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Avulsion of ventral roots in the adult lumbar cord transects motor axons at the root exit and leads to retrograde cell death of 80% of motor neurons 2 weeks later; this result follows a series of retrograde changes, including chromatolysis, loss of transmitter phenotype, and accumulation of phosphorylated neurofilaments in perikarya. Glial cells recruited at the site of retrograde injury express both microglia\u2010specific epitopes (as exemplified by OX\u201042 immunoreactivity) and macrophage\u2010specific markers (e.g., ED\u20101 immunoreactivity). Macrophage\u2010specific markers become particularly intense 7 days postaxotomy and provide additional evidence of active phagocytosis of injured neurons. Ventral root avulsion is a very useful model for assessing mechanisms of motor neuron death and testing the ability of trophic factors and other agents to preserve the phenotype and promote the survival of adult motor neurons in vivo. \u00a9 1994 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/cne.903420105","type":"journal-article","created":{"date-parts":[[2005,1,1]],"date-time":"2005-01-01T09:19:57Z","timestamp":1104571197000},"page":"35-44","source":"Crossref","is-referenced-by-count":234,"title":["Ventral root avulsion: An experimental model of death of adult motor neurons"],"prefix":"10.1002","volume":"342","author":[{"given":"Vassilis E.","family":"Koliatsos","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William L.","family":"Price","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carlos A.","family":"Pardo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Donald L.","family":"Price","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2004,10,9]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0896-6273(91)90265-2"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/cne.901930111"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/cne.902290305"},{"key":"e_1_2_1_5_1","first-page":"79","volume-title":"Neural Regeneration and Transplantation. 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