IGF-1 LR3

Comprehensive Abstract

IGF-1 LR3: Extended-Activity Growth Factor Analog IGF-1 LR3—also known as Long R3 IGF-1—is an engineered, 83-amino-acid analog of insulin-like growth factor 1 (IGF-1). It contains an arginine substitution at position three and a 13-amino-acid extension at its N-terminus. These structural modifications substantially reduce its binding to IGF-binding proteins, allowing more of the molecule to remain available for interaction with the IGF-1 receptor in laboratory settings. This makes IGF-1 LR3 more biologically active in vitro than naturally occurring IGF-1. Researchers use IGF-1 LR3 to investigate: • IGF-1 receptor signaling • Cellular growth and proliferation • Cell survival and viability • Protein-synthesis pathways • Muscle-cell and tissue-development models • Serum-free mammalian cell culture • Recombinant-protein production By activating the IGF-1 receptor, IGF-1 LR3 can influence signaling pathways associated with cellular growth, survival, metabolism, and protein synthesis. Its reduced affinity for IGF-binding proteins makes it especially useful for studying sustained IGF-1 receptor activity under controlled laboratory conditions. Important Notice IGF-1 LR3 is intended strictly for laboratory research and analytical use. It is not approved for human consumption, medical treatment, bodybuilding, veterinary use, or diagnostic purposes. The biological effects observed in laboratory models should not be interpreted as established benefits in humans.