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Autophagy plays an important role in the cellular response to a variety ofmetabolic stress conditions thus contributing to the maintenance of intracellular homeostasis.Caveolins are a family of membrane-bound scaffolding proteins that compartmentalize and negatively regulate signal transduction.Recent studies have implicated that autophagy of tumor cells associated with stromal Cav-1.In this system, we first developed a stable low expression of Cav-1 gene knockdown cell model in human hepatoma cells (SMMC-7721) employing siRNA technology, observing the marker protein of autophagy, microtubule-associated protein 1 light chain-3(MAP1-LC3, LC3), expression changed induced by serum deprivation.