K. Ryoke et al., A conditioning lesion promotes in vivo nerve regeneration in the contralateral sciatic nerve of rats, BIOC BIOP R, 267(3), 2000, pp. 715-718
Citations number
24
Categorie Soggetti
Biochemistry & Biophysics
Journal title
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
A conditioning lesion in the sciatic nerve increases in vivo axonal regener
ation in the nerve after a second transection. We studied whether this incr
eased regeneration also occurs in the contralateral nerve. The left sciatic
nerve was transected and sutured in Wistar rats; the nerve was exposed but
not transected in controls. After 5 days, the right sciatic nerves of all
rats were transected and sutured, Neuronal regeneration was measured at 0,
1, 3, 5, and 7 days with the pinch test and histological staining. IL-1 bet
a and TGF-beta 1 expression was also measured. The initial delay in the exp
erimental group was significantly shorter, but the regeneration rates were
the same. The expression of IL-1 beta and TGF-beta 1 in the right dorsal ro
ot ganglia was significantly higher in the experimental group. Nerve injury
enhances cytokine expression in the contralateral dorsal root ganglion and
promotes contralateral nerve regeneration in vivo by shortening the initia
l delay. (C) 2000 Academic Press.