HIF1A and hepatocellular carcinoma: Secondly, although we focused mainly on assays of EIF3C-exosomes mediated angiogenesis, how these EIF3C-exosomes increased EIF3C expression in Huh7 subcutaneous tumors in nude mice to mimic the observation of EIF3C upregulation in human HCC tissues and how EIF3C exosome mediated angiogenesis without affecting expression of HIF1A and VEGF in HCC cells require additional mechanistic studies.