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"Preserved incretin activity of glucagon-like peptide 1 [7-36 amide] but not of synthetic human gastric inhibitory polypeptide in patients with type-2 diabetes mellitus." Journal of Clinical Investigation , 91(1), 301-307
This combination produces synergistic GH release through complementary receptor pathways, drives IGF-1 production that stimulates muscle protein synthesis, and does so without the cortisol and ACTH elevation seen with older growth hormone secretagogues
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Together, it is clear that anti-IGF-IR agents may paradoxically stimulate tumor microenvironment remodeling to boost IGF signaling through alternative pathways, leading to cancer resistance to anti-IGF-IR agents