Extracellular Application of CRMP2 Increases Cytoplasmic Calcium through NMDA Receptors

被引：15

作者：

Castillo, Cecilia ^{[1
]}

Carlos Martinez, Juan ^{[1
]}

Longart, Marines ^{[1
]}

Garcia, Lisbeth ^{[1
]}

Hernandez, Marianela ^{[1
]}

Carballo, Jeismar ^{[1
]}

Rojas, Hector ^{[2
]}

Matteo, Lorena ^{[1
]}

Casique, Liliana ^{[3
]}

Leonardo Escalona, Jose ^{[3
]}

Rodriguez, Yuryanni ^{[1
]}

Rodriguez, Jessica ^{[1
]}

Hernandez, Deyanell ^{[1
]}

Balbi, Domingo ^{[1
]}

Villegas, Raimundo ^{[1
]}

机构：

[1] Inst Estudios Avanzados IDEA, Unidad Neurociencias, Carretera Nacl Hoyo de la Puerta Baruta, Baruta 1080, Estado Miranda, Venezuela

[2] Univ Cent Venezuela, Fac Med, Inst Inmunol, Caracas 1051, Venezuela

[3] Univ Simon Bolivar, Dept Biol Celular, Caracas 1080, Venezuela

来源：

NEUROSCIENCE | 2018年 / 376卷

关键词：

excitotoxicity; CBD3; peptide; calcium imaging; calcium dysregulation confocal; hippocampal neurons; RESPONSE MEDIATOR PROTEIN-2; NERVE CONDITIONED MEDIUM; PC12; CELLS; NEURONAL DIFFERENTIATION; FUNCTIONAL ANNOTATION; THERAPEUTIC TARGET; PROTEOMIC ANALYSIS; NEURITE OUTGROWTH; COMPREHENSIVE MAP; SUBSTANTIA-NIGRA;

D O I：

10.1016/j.neuroscience.2018.02.002

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Collapsin Response Mediator Protein 2 (CRMP2) is an intracellular protein involved in axon and dendrite growth and specification. In this study, CRMP2 was identified in a conditioned media derived from degenerated sciatic nerves (CM). On cultured rat hippocampal neurons, acute extracellular application of CM or partially purified recombinant CRMP2 produced an increase in cytoplasmic calcium. The increase in cytoplasmic calcium was mostly mediated through NMDA receptors, with a minor contribution of N-type VDCC, and it was maintained as long as CM was present. By using live-labeling of CRMP2, Ca2+ channel binding domain 3 (CBD3) peptide derived from CRMP2, and recombinant CRMP2, we demonstrated that that this effect was mediated by an action on the extracellular side of the NMDA receptor. This is the first report of an extracellular action of CRMP2. Prolonged exposure to extracellular CRMP2, may contribute to neuronal calcium dysregulation and neuronal damage. (C) 2018 IBRO. Published by Elsevier Ltd. All rights reserved.

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收藏

页码：204 / 223

页数：20

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