The neurogenic response of cardiac resident nestin cells was associated with GAP43 upregulation and abrogated in a setting of type I diabetesReportar como inadecuado




The neurogenic response of cardiac resident nestin cells was associated with GAP43 upregulation and abrogated in a setting of type I diabetes - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Cardiovascular Diabetology

, 12:114

First Online: 12 August 2013Received: 22 July 2013Accepted: 23 July 2013

Abstract

BackgroundCardiac nestin cells exhibit properties of a neural progenitor-stem cell population characterized by the de novo synthesis of neurofilament-M in response to ischemic injury and 6-hydroxydopamine administration. The induction of growth associated protein 43 GAP43 was identified as an early event of neurogenesis. The present study tested the hypothesis that the de novo synthesis of neurofilament-M by nestin cells was preceded by the transient upregulation of GAP43 during the acute phase of reparative fibrosis in the infarcted male rat heart. Secondly, a seminal feature of diabetes is impaired wound healing secondary to an inadequate neurogenic response. In this regard, an additional series of experiments tested the hypothesis that the neurogenic response of cardiac nestin cells was attenuated in a setting of type I diabetes.

MethodsThe neurogenic response of cardiac nestin cells was examined during the early phase of reparative fibrosis following permanent ligation of the left anterior descending coronary artery in the adult male rat heart. The experimental model of type I diabetes was created following a single injection of streptozotocin in adult male rats. The impact of a type I diabetic environment on the neurogenic response of cardiac nestin cells was examined during myocardial infarction and following the administration of 6-hydroxydopamine.

ResultsDuring the early phase of scar formation-healing, the density of GAP43-nestin fibres innervating the peri-infarct-infarct region was significantly increased, whereas neurofilament-M-nestin fibres were absent. With ongoing scar formation-healing, a temporal decrease of GAP43-nestin fibre density and a concomitant increase in the density of innervating neurofilament-M-nestin fibres were observed. The neurogenic response of cardiac nestin cells during scar formation-healing was inhibited following the superimposition of type I diabetes. The de novo synthesis of neurofilament-M by nestin cells after 6-hydroxydopamine administration was likewise attenuated in the heart of type I diabetic rats whereas the density of GAP43-nestin fibres remained elevated.

ConclusionThe transient upregulation of GAP43 apparently represents a transition event during the acquisition of a neuronal-like phenotype and a type I diabetic environment attenuated the neurogenic response of cardiac nestin cells to ischemia and 6-hydroxydopamine.

KeywordsMyocardial infarction Diabetes Nestin cells GAP43 Neurogenesis Electronic supplementary materialThe online version of this article doi:10.1186-1475-2840-12-114 contains supplementary material, which is available to authorized users.

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Autor: Andreanne Chabot - Marc-Andre Meus - Vanessa Hertig - Natacha Duquette - Angelino Calderone

Fuente: https://link.springer.com/article/10.1186/1475-2840-12-114







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