22 July 2021
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Original Citation:
NRG-1/ERBB PATHWAY IS MODULATED IN SCHWANN CELL-SPECIFIC GABA-B1 RECEPTOR NULL MICE
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22/1/2015
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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