Analysis of trophic responses in lesioned brain: focus on basic fibroblast growth factor mechanisms
Braz. j. med. biol. res
; 31(2): 231-41, feb. 1998. ilus, graf
Article
em En
| LILACS
| ID: lil-212573
Biblioteca responsável:
BR1.1
RESUMO
The actions of fibroblast growth factors (FGFs), particularly the basic from (bFGF), have been described in a large number of cells and include mitogenicity, angiogenicity and wound repair. The present review discusses the presence of the bFGF protein and messenger RNA as well as the presence of the FGF receptor messenger RNA in the rodent brain by means of semiquantitative radioactive in situ hybridization in combination with immunohistochemistry. Chemical and mechanical injuries to the brain trigger a reduction in neurotransmitter synthesis and neuronal death which are accompanied by astroglial reaction. The altered synthesis of bFGF following brain lesions or stimulation was analyzed. Lesions of the central nervous system trigger bFGF gene expression by neurons and/or activated astrocytes, depending on the type of lesion and time post-manipulation. The changes in bFGF messenger RNA are frequently accompanied by a subsequente increase of bFGF immunoreactivity in astrocytes in the lesioned pathway. The reactive astrocytes and injured neurons synthesize increased amount of bFGF, which may act as a paracrine/autocrine factor, protecting neurons from death and also stimulating neuronal plasticity and tissue repair.
Texto completo:
1
Índice:
LILACS
Assunto principal:
Lesões Encefálicas
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RNA Mensageiro
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Astrócitos
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Fator 2 de Crescimento de Fibroblastos
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Receptores de Fatores de Crescimento de Fibroblastos
Limite:
Animals
Idioma:
En
Revista:
Braz. j. med. biol. res
Assunto da revista:
BIOLOGIA
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MEDICINA
Ano de publicação:
1998
Tipo de documento:
Article
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Congress and conference
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Project document