Differential proteoglycan expression in two spinal cord regions after dorsal root injury.
Dorsal root injury leads to reactive gliosis in the spinal cord dorsal root entry zone and dorsal column, two regions that undergo Wallerian degeneration, but have distinct growth-inhibitory properties. This disparity could in part be due to differences in the number of degenerating sensory fibers, differences in glial cell activation, and/or to differential expression of growth-inhibitory molecules such as chondroitin sulfate proteoglycans. Laser capture microdissection of these two spinal cord white matter regions, followed by quantitative analysis of mRNA expression by real-time PCR, revealed that glial marker transcripts were differentially expressed post-injury and that the chondroitin sulfate proteoglycans Brevican and Versican V1 and V2 were preferentially up-regulated in the dorsal root entry zone, but not the dorsal column. These results indicate that reactive gliosis differs between these two regions and that Brevican and Versican are potential key molecules participating in the highly inhibitory properties of the dorsal root entry zone.
Waselle
Laurent
L
Department of Experimental Surgery, CHUV, Faculty of Biology and Medicine, University of Lausanne, Switzerland.
Quaglia
Xavier
X
Zurn
Anne D
AD
D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D058581:Brevican; D002455:Cell Division; D049109:Cell Proliferation; D011508:Chondroitin Sulfate Proteoglycans / Q000235:genetics / Q000378:metabolism*; D005911:Gliosis / Q000378:metabolism / Q000473:pathology; D006801:Humans; D037181:Lectins, C-Type / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D009416:Nerve Regeneration / Q000502:physiology; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism*; D058580:Neurocan; D009457:Neuroglia / Q000166:cytology / Q000378:metabolism; D011509:Proteoglycans / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013116:Spinal Cord / Q000166:cytology / Q000378:metabolism / Q000473:pathology; D013126:Spinal Nerve Roots / Q000293:injuries / Q000378:metabolism / Q000473:pathology; D053675:Versicans / Q000235:genetics / Q000378:metabolism*; D014855:Wallerian Degeneration / Q000378:metabolism / Q000473:pathology
C546938:BCAN protein, human; C553057:Bcan protein, mouse; D015415:Biomarkers; D058581:Brevican; D011508:Chondroitin Sulfate Proteoglycans; D037181:Lectins, C-Type; C507576:Ncan protein, mouse; D009419:Nerve Tissue Proteins; D058580:Neurocan; D011509:Proteoglycans; D012333:RNA, Messenger; D053675:Versicans