Article Title: p75 Neurotrophin Receptor Regulates the Timing of the Maturation of Cortical Parvalbumin Cell Connectivity and Promotes Ocular Dominance Plasticity in Adult Visual Cortex
Figure Lengend Snippet: proBNDF-mediated p75NTR activation in cortical PV cells reduces their perisomatic boutons and restores ocular dominance plasticity in adult visual cortex in vivo . (a) Experimental approach. (b) The number of immunolabeled PV-positive puncta (green) surrounding NeuN-positive neuronal somata (red) is reduced in the binocular visual cortex ipsilateral to the minipump releasing mut-proBDNF (Ipsi) compared to the contralateral cortex (Contra) in the same animal. On the other hand, the number of PV-positive puncta per NeuN-positive profile in the ipsilateral cortex of PV-CRE; p75 flx/flx mice is similar to that observed in the contralateral, untreated cortex. (c) Low (c1) and high (c2) magnification of PNN (red, WFA staining) enwrapping PV cells (green) show a dramatic reduction in both PNN density and intensity in the visual cortex infused with mut-proBFNF. This effects is abolished in PV-CRE; p75 flx/flx mice. Scale bar, c1: 100µm; b, c2: 10µm. (d) Quantification of the mean number of PV-positive puncta per NeuN-positive profile in ipsilateral compared to contralateral cortex. Ipsi/Contra ratio is obtained for each animal, and then averaged between different animals. Mean Ipsi/Contra ratio is significantly reduced in Mut-proBDNF infused p75 Ctrl but not in PV-CRE; p75 flx/flx mice (t-test, p
Article Snippet: In addition, we tested the following anti-proBDNF antibodies: chicken anti-proBDNF (Millipore, AB9042), rabbit-anti-proBDNF (Alomone Labs, ANT-006) and guinea-pig-anti-proBDNF (Alomone Lab, AGP-032).
Techniques: Activation Assay, In Vivo, Immunolabeling, Mouse Assay, Staining, T-Test