CD8A and renal cell adenocarcinoma: The gene CPT1B, which is related to fatty acid metabolism, was positively correlated with T cells, CD8+T cells, cytotoxic lymphocytes and NK cells in the RCC tumor microenvironment, and negatively correlated with myeloid dendritic cells, fibroblasts and endothelial cells, and knockdown of CPT1B significantly inhibited the proliferation of RCC cells [118].