Endogenous rescue factor abolishing neuronal cell death by a wide spectrum of familial Alzheimerμs disease genes and Aβ', '[Gly14]-humanin (HNG) stimulates cell growth, proliferation, and cell cycle progression. It enhances proteins such as kinases, transporters, transmembrane receptors, and transcription and translational regulators. HNG exhibits intense in vitro neuroprotective effects compared to natural HN. Studies show th at it is an effective cytoprotectant both in vitro and in vivo. HNG is found to prevent high glucose (HG)-induced apoptosis of endothelial cells (ECs). It is proven to inhibit AngII-induced phenotypic switch in vascular smooth muscle cells (VSMCs).