HSPA1A (Heat Shock Protein Family A Member 1A) is a molecular chaperone primarily functioning in cellular stress response and protein quality control. As an ATP-dependent protein disaggregase, HSPA1A binds denatured proteins and facilitates their refolding or degradation, playing critical roles in cellular heat acclimation and unfolded protein responses 1. The protein protects cells from thermal cytotoxicity by regulating autophagy through ESCRT-0 and STAM2 binding, thereby impeding autophagic flux and promoting cell survival under heat stress 1. Genetically predicted HSPA1A levels associate causally with type 2 diabetes and multiple microvascular complications, including diabetic nephropathy and retinopathy 2. HSPA1A emerges as a hub gene in neurodegenerative diseases, with elevated expression identified in Alzheimer's disease, Parkinson's disease, and multiple sclerosis brain tissue, suggesting therapeutic potential in these conditions 3. Additionally, HSPA1A mediates associations between social disadvantage and age-related disease susceptibility, with upregulation contributing to accelerated aging through pro-inflammatory NF-κB signaling 4. In cancer immunology, HSPA1A expression defines a distinct stress-response T-cell subset in colorectal cancer liver metastases, influencing immune checkpoint therapy responses 5. In hepatocellular carcinoma, HSPA1A upregulation in immune cells correlates with poor prognosis and represents an immunotherapeutic target 6. Genetic polymorphisms in HSPA1A associate with schizophrenia symptomatology severity 7.