Survivin shRNA induces caspase-3-dependent apoptosis and enhances cisplatin sensitivity in squamous cell carcinoma of the tongue.
Survivin is a member of the inhibitor of apoptosis protein (IAP) family; it is overexpressed in most cancer tissues and induces resistance to chemotherapy. In this study, we investigated whether a short hairpin RNA (shRNA) targeting survivin can induce apoptosis and enhance chemosensitivity to cisplatin in squamous cell carcinoma of the tongue. Results showed that chemosensitivity to cisplatin was surviving dependent in three cell lines (Tca8113, Bca885, and MCF7); higher survivin mRNA expression levels were associated with lower sensitivity to cisplatin. A plasmid-containing survivin shRNA was constructed and transfected into cell line Tca8113. Survivin shRNA inhibited expression of survivin mRNA and protein (63% and 65% inhibition, respectively), significantly inhibited cell proliferation, and enhanced chemosensitivity to cisplatin (p < 0.05). Apoptosis and caspase-3 activity were induced when cells were treated with survivin shRNA and/or cisplatin. Survivin shRNA induced caspase-3-dependent apoptosis and enhanced chemosensitivity to cisplatin in these tongue squamous cell carcinoma cell lines.
Xu
Jian-Hui
JH
Department of Oral & Maxillofacial Surgery, Guanghua School of Stomatology & Hospital of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong, China.
Wang
An-Xun
AX
Huang
Hong-Zhang
HZ
Wang
Jian-Guang
JG
Pan
Chao-Bin
CB
Zhang
Bin
B
D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis; D002294:Carcinoma, Squamous Cell / Q000188:drug therapy* / Q000473:pathology; D053148:Caspase 3 / Q000502:physiology*; D045744:Cell Line, Tumor; D002945:Cisplatin / Q000494:pharmacology*; D006801:Humans; D051034:Inhibitor of Apoptosis Proteins; D008869:Microtubule-Associated Proteins / Q000037:antagonists & inhibitors* / Q000235:genetics; D034741:RNA, Small Interfering / Q000235:genetics*; D000077022:Survivin; D014062:Tongue Neoplasms / Q000188:drug therapy* / Q000473:pathology
D000970:Antineoplastic Agents; C107489:BIRC5 protein, human; D051034:Inhibitor of Apoptosis Proteins; D008869:Microtubule-Associated Proteins; D034741:RNA, Small Interfering; D000077022:Survivin; D053148:Caspase 3; D002945:Cisplatin