CALM1 and cervical cancer: Here we show that carbonate apatite-mediated delivery of siRNA against PLC-gamma-2 (PLCG2) and calmodulin 1 (CALM1) genes sensitized a human cervical cancer cell line (HeLa cell) to doxorubicin- and paclitaxel-induced cell death depending on the doses of the drugs while no such synergistic effect was observed with cisplatin, another commonly used chemotherapy drugs.