[Apoptosis induces by exogenous nitric oxide in Tca8113 cells].
To observe the apoptosis induced by exogenous NO in Tca8113 cells and to investigate the possible mechanism.



SNP as NO donor was used to treat the tongue squamous cell carcinoma Tca8113 cells. Cytotoxic and apoptotic effects of NO on Tca8113 cells were examined by using MTT assay, acridine orange (AO) staining, Wright-Giemsa staining, agarose gel electrophoresis and flow cytometry. Western blot was performed for investigating the apoptotic mechanism.



NO had a remarkable proliferation inhibiting effect on Tca8113 cells. After being exposed to exogenous NO, Tca8113 cells showed series of apoptotic morphological changes such as cell shrinkage, nuclear condensation; and also showed DNA fragmentation, G2/M phase arrest as well as upregulation of the tumor suppressor P53 protein.



Exogenous NO has a proliferation inhibition and apoptosis induction effect on Tca8113 cells in a concentration and time-dependent manner, P53 protein may be involved in the apoptosis induced by NO.
The Affiliated of Stomatological Hospital, College of Medicine, Zhejiang University, Hangzhou 310006, China. tongxy112@sina.com
Xiao-yan
XY
Dong
Shi-fang
SF
Zhao
Fu-dong
FD
Zhu
Yan-ming
YM
Liu
D000970:Antineoplastic Agents / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects*; D002294:Carcinoma, Squamous Cell / Q000378:metabolism / Q000473:pathology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D006801:Humans; D009569:Nitric Oxide / Q000494:pharmacology*; D014062:Tongue Neoplasms / Q000378:metabolism / Q000473:pathology*; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis* / Q000235:genetics
D000970:Antineoplastic Agents; D016159:Tumor Suppressor Protein p53; D009569:Nitric Oxide