The extracellular matrix provides directional cues for neuronal migration during cerebellar development

The extracellular matrix provides directional cues for neuronal migration during cerebellar development

Autor Porcionatto, Marimélia Aparecida Autor UNIFESP Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Resumo Normal central nervous system development relies on accurate intrinsic cellular programs as well as on extrinsic informative cues provided by extracellular molecules. Migration of neuronal progenitors from defined proliferative zones to their final location is a key event during embryonic and postnatal development. Extracellular matrix components play important roles in these processes, and interactions between neurons and extracellular matrix are fundamental for the normal development of the central nervous system. Guidance cues are provided by extracellular factors that orient neuronal migration. During cerebellar development, the extracellular matrix molecules laminin and fibronectin give support to neuronal precursor migration, while other molecules such as reelin, tenascin, and netrin orient their migration. Reelin and tenascin are extracellular matrix components that attract or repel neuronal precursors and axons during development through interaction with membrane receptors, and netrin associates with laminin and heparan sulfate proteoglycans, and binds to the extracellular matrix receptor integrins present on the neuronal surface. Altogether, the dynamic changes in the composition and distribution of extracellular matrix components provide external cues that direct neurons leaving their birthplaces to reach their correct final location. Understanding the molecular mechanisms that orient neurons to reach precisely their final location during development is fundamental to understand how neuronal misplacement leads to neurological diseases and eventually to find ways to treat them.
Palavra-chave Extracellular matrix
Central nervous system
Cerebellum
Neuron
Migration
Idioma Inglês
Data de publicação 2006-03-01
Publicado em Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 39, n. 3, p. 313-320, 2006.
ISSN 0100-879X (Sherpa/Romeo, fator de impacto)
Publicador Associação Brasileira de Divulgação Científica
Extensão 313-320
Fonte http://dx.doi.org/10.1590/S0100-879X2006000300001
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000236565000001
SciELO S0100-879X2006000300001 (estatísticas na SciELO)
Endereço permanente http://repositorio.unifesp.br/handle/11600/2963

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