ADD1 encodes alpha-adducin, a membrane-cytoskeleton-associated protein that promotes assembly of the spectrin-actin network and binds to calmodulin. The protein functions in actin cytoskeleton organization and actin filament capping. ADD1 has significant clinical relevance in cardiovascular disease, particularly hypertension. The Gly460Trp polymorphism (rs4961) shows population-specific associations with essential hypertension risk, with meta-analyses demonstrating increased hypertension susceptibility in Asian populations 1. This polymorphism also influences blood pressure response to hydrochlorothiazide therapy, with carriers showing different therapeutic responses 2. In Caucasian populations from Madeira Island, the Gly460Trp variant independently increases essential hypertension risk 3. ADD1 polymorphisms are associated with ischemic stroke susceptibility and correlate with magnetic resonance angiographic abnormalities in stroke patients 45. Additionally, variant T allele carriers may have increased risk of new-onset diabetes when treated with diuretic antihypertensive therapy 6. Recent genome-wide association studies have also identified ADD1 as a potentially novel risk loci for Parkinson's disease across multiple ancestries 7. The protein also participates in transcriptional regulation, with ADD1/SREBP1c competing with TWIST2 for DNA binding sites 8.