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Introduction The insulin receptor (IR) and the IGF1 receptor (IGF1R), both evolved from a common ancestor gene, represent fundamental regulators of glucose metabolism and growth, respectively, in response to nutrient availability. It is now well
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molecules) and finally into monomers. Monomers are the biologically active forms that bind to the insulin receptor (IR). Figure 1 Human insulin is a peptide hormone composed of 51 amino acids and has a molecular weight of 5808 Da. The primary structure of
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. 2009 ). Many tumor cells express insulin as well as insulin-like growth factor1 (IGF1) receptors (IGF1R). According to the current state of knowledge, insulin-binding to the IGF1R, known to trigger mitogenic intracellular pathways, is a substantial
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if we are to treat effectively or even prevent this adverse state. Of some interest is ER and also growth factor receptor signalling pathways, notably the epidermal growth factor receptor (EGFR)/HER2 and insulin-like growth factor receptor (IGF-1R
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peptide hormone insulin is a major regulator of glucose homeostasis and cell growth. The first step in insulin action is the binding of the hormone to the insulin receptor (IR), a phylogenetically ancient receptor protein embedded in the plasma membrane of
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, in the inhibition of the human epidermal growth factor (EGF) receptor-2 (HER2) in women with HER2-positive breast cancer and the blockade of EGF receptor kinase activity in non-small-cell lung cancer. In contrast, the insulin-like growth factor (IGF
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Clinical Research Institute at Rambam (CRIR) and the Faculty of Medicine, The Laboratory of Molecular Medicine, Division of Endocrinology, Technion, Diabetes and Metabolism Clinical Research Center of Excellence, Haifa, Israel
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receptor (IR), but at supraphysiological concentrations, insulin can also activate the insulin-like growth factor 1 receptor (IGF1R). Given the fact that both receptors belong to the same tyrosine kinase receptor subfamily, IR shares great structural
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Introduction Experimental evidence that certain cancers are mitogenically responsive to insulin has been available for decades ( Heuson et al . 1967 ) and is consistent with recent work demonstrating growth inhibitory effects of insulin receptor
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patients is associated with hyperinsulinemia which stimulates the proliferation of epithelial cells ( Gualberto & Pollak 2009 , Pollak 2012 ). The holo-insulin receptor (IR) formation and the signaling of IR pathway is activated by IGF1R depletion ( Zhang
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Introduction The insulin-like growth factor (IGF) system comprises two ligands (IGF-1 and IGF-2) as well as the closely related hormone insulin, six binding proteins (IGFBP1-6), three receptors (type I and type II IGF and the insulin receptors) and