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  • Title: Co-localization of basic fibroblast growth factor-like immunoreactivity and its receptor mRNA in the rat spinal cord and the dorsal root ganglion.
    Author: Kato H, Wanaka A, Tohyama M.
    Journal: Brain Res; 1992 Apr 03; 576(2):351-4. PubMed ID: 1325241.
    Abstract:
    In the present study, we examined the localizations of basic fibroblast growth factor-like immunoreactivity (bFGF-LI) and its receptor mRNA in the spinal cord and the dorsal root ganglion of the rat. Anti-bFGF peptide antibody and cRNA probe were employed to visualize the localizations of bFGF-LI and FGF receptor (FGF-R) mRNA, respectively. In the spinal cord, we observed that a number of neurons including the motor neurons and interneurons were positive for both substances. In the dorsal root ganglion (DRG), the large neurons preferentially showed co-localization of bFGF-LI and FGF-R mRNA, while the small neurons were not always positive for both. Given the fact that FGF-R is a membrane-spanning protein, these findings suggest the following two possibilities: (1) bFGF acts on the neurons of the spinal cord and the DRG in an autocrine and/or paracrine manner; (2) FGF-R mRNA-positive neurons take up bFGF from innervating neurons and/or surrounding glias in a receptor-mediated fashion.
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