Increases intracellular lipid accumulation. Stimulates expression of cytokines including IL6, MIF and VEGFA. Enhances cell growth and proliferation. {ECO:0000269|PubMed:15930302, ECO:0000269|PubMed:20624928}. This is the function of ENSG00000135245 (HILPDA, hypoxia inducible lipid droplet associated).