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Locomotion induces changes in Trk B receptors in small diameter cells of the spinal cord

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EN
Trk B immunoreactivity (IR) was detected in number of spinal cells at the lumbar level in non-trained animals (Fig. 1A). The strongest IR appeared in the perikarya and processes of small diameter cells rarely scattered in the grey and white matter. The average area of these cells was 50 mm2 (? 10). Exercise increased by over 50% the number of TrkB immunostained small cells (Fig.1B). An enhancement of perikaryonal immunostaining of these cells was also observed (Fig.1B, inset). Testing the identity of Trk B IR small diameter cells did not prove their astroglial (GFAP IR) and gabaergic (GAD IR) phenotype in the grey matter. Some of TrkB IR cells in the white matter were astrocytes. Our data point to physical exercise as a potent method to make spinal cells more receptive to neurotrophic stimuli.
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communication
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M. Skup, Department of Neurophysiology, Nencki Institute of Experimental Biology, 3 Pasteur St., 02-093 Warsaw, Poland, Email: mskup@nencki.gov.pl
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bwmeta1.element.element-from-psjc-54cf1586-b45b-3f24-8180-f71b56455b0e
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