PMID: 7541717May 1, 1995Paper

Insulin-like growth factor II is an experimental stress inducible gene in a porcine model of brief coronary occlusions

Cardiovascular Research
A KlugeW Schaper

Abstract

Previous observations have shown that myocardium activates many adaptive processes after brief ischaemia. The aim of this study was to determine whether insulin-like growth factors (IGF) as well as their receptors and binding proteins (IGFBP), which control the activity of the IGF, may play an important role during these processes. Ischaemia was induced in anaesthetised open chest pigs by two 10 min occlusions of the left anterior descending coronary artery, separated by 30 min of reperfusion, and followed by reperfusion up to 210 min. Tissue from the ischaemic area and from a non-ischaemic control region of the same heart was examined by means of northern blot, slot blot, and in situ hybridisation. IGF-I, IGF-II, the type I receptor, the insulin receptor, and IGFBP-2-6 are constitutively expressed in porcine myocardium. In situ hybridisation showed that IGF-I and IGF-II are mainly transcribed by myocytes. Ischaemia/reperfusion led to an early and significant increase in IGF-II mRNA compared to non-sham controls but not in comparison with sham operated animals, which already showed a (not significantly) enhanced IGF-II expression. In each case the IGF-II mRNA levels are equal in the control and the experimental region of the sa...Continue Reading

Citations

Jan 29, 2003·Growth Hormone & IGF Research : Official Journal of the Growth Hormone Research Society and the International IGF Research Society·M ScheinowitzM Eldar

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