BIRC2 and cancer: HIAP-1 and HIAP-2 mRNA and protein expression levels of BcaCD885 cancer cells decreased when BcaCD885 cells were treated with Kuding tea polyphenol (Figure 6); the expression levels in the highest concentration of 100 μg/mL treated cancer cells were significantly (p < 0.05) lower than those with 25 and 50 μg/mL Kuding tea polyphenol treatment.