Identification of regeneration-associated genes after central and peripheral nerve injury in the adult ratReportar como inadecuado




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BMC Neuroscience

, 4:8

First Online: 19 May 2003Received: 29 November 2002Accepted: 19 May 2003

Abstract

BackgroundIt is well known that neurons of the peripheral nervous system have the capacity to regenerate a severed axon leading to functional recovery, whereas neurons of the central nervous system do not regenerate successfully after injury. The underlying molecular programs initiated by axotomized peripheral and central nervous system neurons are not yet fully understood.

ResultsTo gain insight into the molecular mechanisms underlying the process of regeneration in the nervous system, differential display polymerase chain reaction has been used to identify differentially expressed genes following axotomy of peripheral and central nerve fibers. For this purpose, axotomy induced changes of regenerating facial nucleus neurons, and non-regenerating red nucleus and Clarke-s nucleus neurons have been analyzed in an intra-animal side-to-side comparison. One hundred and thirty five gene fragments have been isolated, of which 69 correspond to known genes encoding for a number of different functional classes of proteins such as transcription factors, signaling molecules, homeobox-genes, receptors and proteins involved in metabolism. Sixty gene fragments correspond to genomic mouse sequences without known function. In situ-hybridization has been used to confirm differential expression and to analyze the cellular localization of these gene fragments. Twenty one genes ~15% have been demonstrated to be differentially expressed.

ConclusionsThe detailed analysis of differentially expressed genes in different lesion paradigms provides new insights into the molecular mechanisms underlying the process of regeneration and may lead to the identification of genes which play key roles in functional repair of central nervous tissues.

Electronic supplementary materialThe online version of this article doi:10.1186-1471-2202-4-8 contains supplementary material, which is available to authorized users.

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Autor: Andreas B Schmitt - Sebastian Breuer - Jan Liman - Armin Buss - Christiane Schlangen - Katrin Pech - Elly M Hol - Gary A

Fuente: https://link.springer.com/







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