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The inhibition of inducible nitric oxide synthase reverts arthritic-induced decrease in pituitary growth hormone mRNA but not in liver insulin-like growth factor I mRNA expression

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dc.contributor.author Ibáñez de Cáceres, Inmaculada
dc.contributor.author Priego, Teresa
dc.contributor.author Martín Velasco, Ana Isabel
dc.contributor.author López-Calderón, Asunción
dc.contributor.author Villanúa, María de los Ángeles
dc.date.accessioned 2016-08-24T12:26:37Z
dc.date.available 2016-08-24T12:26:37Z
dc.date.issued 2003
dc.identifier.citation Íbañez de Cáceres, I., Priego, T., Martín Velasco, A. I., López-Calderón, A., & Villanúa, M. A. (2003). The inhibition of inducible nitric oxide synthase reverts arthritic-induced decrease in pituitary growth hormone mRNA but not in liver insulin-like growth factor I mRNA expression. Journal of Neuroendocrinology, 15(12), 1178-1184. spa
dc.identifier.issn 09538194
dc.identifier.uri http://hdl.handle.net/11268/5663
dc.description.abstract Experimental arthritis induced by Freund-adjuvant administration is a model of chronic inflammation and rheumatoid arthritis associated with a decrease in pituitary growth hormone (GH) and hepatic insulin-like growth factor I (IGF-I) gene expression. Excessive nitric oxide (NO) synthesis by inducible NO synthase (iNOS) has been implicated in the pathogenesis of inflammatory illness. Moreover, NO participates in the regulation of GH secretion at both the hypothalamus and the pituitary. We have examined the role of iNOS activation in producing the changes in the GH-IGF-I axis in arthritic rats. Adult male Wistar rats received aminoguanidine or vehicle from day 20, after adjuvant or vehicle injection, until day 28. Two hours and 30 min after the last aminoguanidine injection, all rats were killed by decapitation. Arthritis increased hypothalamic expression of somatostatin mRNA while it decreased pituitary GH mRNA expression, and both effects were prevented by aminoguanidine administration. In arthritic rats, the parallel decrease in serum IGF-I, and in hepatic IGF-I content and mRNA expression, correlates with the decrease in circulating GH concentrations. Aminoguanidine administration to arthritic rats did not modify either serum GH or serum IGF-I concentrations, or hepatic IGF-I mRNA expression. However, aminoguanidine administration to control rats resulted in a decrease in serum GH concentrations and in a decrease in both hepatic IGF-I mRNA expression and serum IGF-I concentrations. These data suggest that NO mediates the arthritis-induced decrease in GH mRNA expression by acting at a hypothalamic level, but it is not involved in the decrease in hepatic IGF-I mRNA expression. spa
dc.description.sponsorship SIN FINANCIACIÓN spa
dc.language.iso eng spa
dc.title The inhibition of inducible nitric oxide synthase reverts arthritic-induced decrease in pituitary growth hormone mRNA but not in liver insulin-like growth factor I mRNA expression spa
dc.type article spa
dc.description.impact 3.418 JCR (2003) Q2, 24/88 Endocrinology & metabolism, 50/198 Neurosciences spa
dc.identifier.doi 10.1111/j.1365-2826.2003.01117.x
dc.rights.accessRights closedAccess spa
dc.subject.uem Neurociencias spa
dc.subject.uem Endocrinología spa
dc.subject.uem Artritis spa
dc.subject.unesco Neurología spa
dc.subject.unesco Sistema endocrino spa
dc.description.filiation UEM spa
dc.relation.publisherversion http://0-onlinelibrary.wiley.com.busca.uem.es/doi/10. 1111/j.1365-2826.2003.01117.x/full spa
dc.peerreviewed Si spa


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