Expression of Slit2 and Robo1 after traumatic lesions of the rat spinal cord.
We have used semi-quantitative RT-PCR, Western blot, and immunofluorescence imaging approaches to detect the expression levels of Slit2 and its receptor Robo1 in the rat spinal cord after traumatic lesions. Our results revealed that both the mRNA and protein levels of Slit2 were up-regulated in the injured spinal cord. The Slit2 expression level was increased at day 7 until day 14, and then returned to normal level at day 21 after injury. A double-immunolabelling study showed that Slit2 and neurofilament (NF) proteins were both localized in neurons of spinal corda cinerea. Slit2 immunopositivity was detected in neuronal plasma membranes but not in the axonal fibers. In contrast, the immunolabelling of Robo1 in the normal spinal cord was at a low level, mostly in the neurons of spinal corda cinerea, and remained unchanged at all time points following spinal cord injury (SCI). The regulation levels of Slit2 and Robo1 after traumatic lesions in the rat spinal cord are different. Our results indicate that Slit2-Robo1 might not be involved in the inhibitory environment after SCI.
Liu
Jin-Bo
JB
Department of Orthopedics, The Third Affiliated Hospital, Suzhou University, Changzhou, China. jsczljb@yahoo.com.cn
Jiang
Yu-Qin
YQ
Gong
Ai-Hua
AH
Zhang
Zhi-Jian
ZJ
Jiang
Qian
Q
Chu
Xiang-Ping
XP
D000818:Animals; D001369:Axons / Q000378:metabolism* / Q000473:pathology; D015153:Blotting, Western; D015870:Gene Expression; D007150:Immunohistochemistry; D036341:Intercellular Signaling Peptides and Proteins / Q000235:genetics / Q000378:metabolism; D009416:Nerve Regeneration / Q000502:physiology; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism; D009474:Neurons / Q000378:metabolism* / Q000473:pathology; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D011971:Receptors, Immunologic / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013116:Spinal Cord / Q000378:metabolism* / Q000473:pathology; D013119:Spinal Cord Injuries / Q000235:genetics* / Q000378:metabolism* / Q000473:pathology; D000097905:Roundabout Proteins; D000098552:Slit Homolog 2 Protein
D036341:Intercellular Signaling Peptides and Proteins; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; D011971:Receptors, Immunologic; D000097905:Roundabout Proteins; D000098552:Slit Homolog 2 Protein