ITGA5 and cancer: Given the evidence that adipocytes are related to the progression of various cancers, this study explored the internal connection and mechanism between HNSCC and adipocytes.<h4>Methods</h4>Quantitative real-time PCR (qRT-PCR) was used to examine the transfection efficiency of integrin subunit α5 (ITGA5) overexpression plasmid and small interfering RNA of ITGA5 (si-ITGA5).