CAMP and hepatocellular carcinoma: To identify the effect of 1,25(OH)2D3 on the expression of hCAP18/LL-37 in cultured HCC cells, 1,25(OH)2D3 at different concentrations (100 nM, 200 nM, and 500 nM) was added to cells and then CAMP expression levels were detected by qRT-PCR analysis.