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NRG-1/ERBB PATHWAY IS MODULATED IN SCHWANN CELL-SPECIFIC GABA-B1 RECEPTOR NULL MICE

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22 July 2021

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NRG-1/ERBB PATHWAY IS MODULATED IN SCHWANN CELL-SPECIFIC GABA-B1 RECEPTOR NULL MICE

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Title NRG­1/ERBB PATHWAY IS MODULATED IN SCHWANN CELL­SPECIFIC GABA­B1 RECEPTOR NULL MICERoom: Poster Area ­ Session: B08 ­ Abstract Number: FENS­1939 ­ Poster Board Number: B083

Poster No: B083 Presenter: L. Castelnovo Author(s): L. Castelnovo(1), G. Gambarotta(2), L. Caffino(1), S. Melfi(1), A. Faroni(3), P. Procacci(4), B. Bettler(5), F. Fumagalli(1), L. Wrabetz(6), V. Magnaghi(1) Affiliation(s): (1)Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy ; (2)Department of Clinical and Biological Sciences­Ospedale San Luigi, University of Turin, Turin, Italy ; (3)Blond McIndoe Laboratories, The University of Manchester, Manchester, United Kingdom ; (4)Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milan, Italy ; (5)Department of Biomedicine, University of Basel, Basel, Switzerland ; (6)Hunter James Kelly Research Institute­School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, USA

Session: B08: Poster Session ­ Glia­neuron interactions ­ Cell biology and signallingPoster boards: B077­098

Date: Sunday ­ July 06, 2014 11:15 ­ 12:15 Location: Poster Area Subtopic: B.10.b Cell biology and signalling Topic: B.10 Glia­neuron interactions Theme: B. Excitability, synaptic transmission, network functions In the last years great interest has been addressed to the investigation of the molecular mechanisms underlying the regulation of Schwann cells (SC) differentiation. Our recent data suggest that the metabotropic ?­aminobutyric acid type B (GABA­B) receptor is involved in SC differentiation mainly towards the state of non­myelinating SC. In order to investigate the mechanism regulating this process we used a model of conditional knockout mice, in which GABA­B1 receptor was selectively deleted in SC. By means of qRT­PCR and western blot analysis we studied the NRG/ErbB receptor complex in 3­ and 6­months old male mice, assessing the expression of NRG­1 type I and type III, their ErbB2/ErbB3 receptors and the intracellular kinase Erk2 (involved in ErbB signal transduction). In 3­months old mice GABA­B1 receptor deletion correlates with a down­regulation of NRG­1 type III, concomitantly with an up­regulation of ErbB2/ErbB3 and phosphorylated­Erk2 (pErk2), the latter being a key regulator of SC differentiation. These changes are accompanied with alterations of myelin protein expression, morphology and behavioural measurements. Overall, several morphometric parameters are altered in these mice. Indeed, increased number of irregular fibres and rise in myelin thickness, associated to a greater number of Remak bundles, unmyelinated axons and small DRG neurons, are observed. The GABA­B1 conditional mice also show hyperalgesia and allodynia, with walking alterations. Altogether, our findings suggest an involvement of GABA­B receptor and NRG/ErbB signalling in SC maturation towards the non­myelinating phenotype. (Granted by Ass. Française Contre les Myopathies n°16342­2012) For all queries, please write directly to support@meetingxpert.net. Support is available from Monday–Friday 08:00­16:00 (GMT).  We currently support Chrome, Firefox, Internet Explorer 9 or newer. Home   Forum Information   Programme   Industry   My FENS   Help   Advanced Search

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