HTRA2 and neoplasm: Western‐blot analysis of tumor tissues showed that the expression levels of AIF, HtrA2, Smac/Diablo, and Cyto‐C in the Ad‐Vp3 + BAPTA‐AM and Ad‐Vp3 groups were significantly higher than the BAPTA‐AM, Ad‐Mock, and PBS groups (p < 0.05).