IGF 1 inhibits inflammation and accelerates angiogenesis via Ras PI3K IKK NF B signaling pathways to promote wound healing ScienceDirect Insulin like growth factor 1 Wikipedia IGF1 LR3 Peptide Anderson Longevity Clinic Recombinant expression of IGF 1 and LR3 IGF 1 fused with xylanase in Pichia pastoris Applied Microbiology and Biotechnology Springer Nature Link IGF 1 LR3 Dosage Guide: Benefits, Timing, and Results i313 IGF 1 LR3 does not promote growth in late gestation growth restricted fetal sheep American Journal of Physiology Endocrinology and Metabolism American Physiological Society