HSPB7 (heat shock protein family B member 7) is a cardiac-specific small heat shock protein expressed exclusively in insulin-dependent tissues including heart, skeletal muscle, and adipose tissue 1. Structurally, HSPB7 possesses an N-terminal sequence, a conservative α-crystallin domain, and a short C-terminal domain, forming both small oligomers and large aggregates 12. Mechanistically, HSPB7 functions as a molecular chaperone regulating sarcomeric proteostasis by interacting with contractile and cytoskeletal proteins including filamin C and titin 34. HSPB7 specifically regulates filamin C dimerization through hetero-dimer formation that out-competes homo-dimer interfaces, enhancing protein diffusive mobility under biomechanical stress 4. Loss of HSPB7 stimulates autophagy and FilaminC aggregation in cardiomyocytes 3. Beyond cardiac function, HSPB7 oppositely regulates bone marrow mesenchymal stromal cell differentiation, promoting osteogenesis while suppressing adipogenesis via Activin A signaling 5. HSPB7 also exhibits tumor suppressor activity through interaction with 14-3-3 proteins and downregulation of Akt/ERK pathways 6. Clinically, HSPB7 genetic polymorphisms correlate with cardiovascular diseases, obesity, and anthropometric parameters 17, and its absence is embryonically lethal 4. HSPB7 dysfunction is associated with cardiomyopathy and metabolic disorders.