An clinical analysis on the dental emergency patients visiting the emergency room of Dental hospital of Won-kwang university

A case of clear cell carcinoma that is unrelated to diethystilbestrol of the uterine cervix / 대한산부인과학회지

Clear cell carcinoma of the uterine cervix is rare type of the uterine cervical adenocarcinoma. Although uterine cervical adenocarcinomas presently represent 20% to 30% of cervical cancers in the industrialized countries, the clear cell carcinoma of uterine cervix is very rare malignancy that accounts for 4% to 9% of the adenocarcinoma of uterine cervix. This malignancy occurs in two distinct age groups; those younger than 24 years and those older than 45 years. In younger patients, most of these malignancies are mainly related to prenatal diethylstilbestrol (DES) exposure, but older patients are unrelated to in utero DES-exposure. We experienced a case of clear cell carcinoma of the uterine cervix of 34 years old housewife who was not related to prenatal DES-exposure. We presented a case with a brief review of related literatures.

The Study of the Cytotoxic Mechanism of Cisplatin in HeLa Cells / 대한산부인과학회잡지

Cis-diamminedichloroplatinum II (cisplatin) has been reported to induce cell death. However, the mechanism by which cisplatin is induced the apoptosis of cancer cells is still unclear. To evaluate the mechanistic insights of apoptosis by cisplatin, we tested the activities of apoptotic signaling pathway in HeLa cells. Apoptotic death of HeLa cells by cisplatin was confirmed by ladder-pattern fragmentation of genomic DNA. Cisplatin induced the activation of caspase-3 and 9 proteases in a time dependent manner. The caspase-3 protease activation and the cleavage of poly (ADP-ribose) polymerase (PARP) and procaspase-3 was demonstrated. We also showed that the expression of Bcl-2 and Bcl-xL was markedly decreased by the addition of cisplatin in HeLa cells. Moreover, expression of Fas and FasL proteins was increased by cisplatin. These data suggest that cisplatin triggers the activation of apoptotic signaling pathway in human cervical cancer, HeLa cells, via affects the expression of Fas, FasL and Bcl-2 families as well as triggers the activation of caspase-3 and -9 proteases.

Involvement of Oxidative Stress in Cisplatin-Induced Apoptosis in HeLa Cells / 대한산부인과학회잡지

OBJECTIVE: To determine whether oxidants are formed as part of the cisplatin-induced apoptotic process, intracellular markers of oxidative stress were examined. METHODS: Apoptotic death of HeLa cells by cisplatin was confirmed by flow cytometry. RESULTS: The pre-treatment with glutathione (GSH) significantly attenuated cisplatin-induced apoptosis through the reduction of reactive oxygen species (ROS) accumulation and diminished caspases-3 and 9 protease activity. Furthermore, z-VAD-fmk, an inhibitor of pan-caspase, effectively inhibited the activation of caspases and prevented apoptosis by cisplatin, although cisplatin-induced ROS generation was not attenuated. CONCLUSION: These data indicate that ROS may play a role as an upstream mediator of caspases. Taken together, our results suggest that oxidative stress mediates cisplatin-induced apoptosis in HeLa cells.