ABSTRACT
Purpose:To study the growth suppressing effect of sodium butyrate(NaB) on human ovarian carcinoma KK cells and endometrial carcinoma HHUA cells and its mechanism, as well as its potential as a new antitumor agent. Methods:Human endometrial carcinoma cell line HHUA and ovarian carcinoma cell line KK were cultured in vitro and exposed to sodium butyrate. The changes of morphology and chromatin induced by NaB were investigated by means of HE staining and DNA fluorescent staining, respectively. Cell cycle distribution and apoptosis were quantified by using flow cytometric analysis. Apoptotic degradation of DNA was analyzed by extracting DNA and separated by electrophoresis through a 2% agarose gel. Western blotting analysis was carried out to determine the expression of PARP, Fas, Bax and Bcl 2 proteins.Results:NaB arrested HHUA and KK cells at G 1 phase at the low concentration (≤2 mol/L), after 24 hours treatment. The percentage of G 1 phase was up to 70%. While at the medium concentration (4 mol/L and 10 mol/L), both HHUA and KK cells manifested typical apoptotic morphological and chromatic features. High concentration (≥10 mol/L) caused cell necrosis. NaB could upregulate Fas protein expression in HHUA, whereas the levels of Bcl 2 and Bax proteins remained unchanged. Conclusions:NaB may suppress the growth of HHUA and KK cells through arrest of cell cycle and induction of apoptosis. The responses of cells to NaB vary at the different concentrations. NaB induces cell cycle arrest at low concentration and induces apoptosis at medium concentration. The inhibition of NaB on cell growth is in a time and dose dependent manner. Upregulation of Fas protein may be the mechanism of apoptosis induction in HHUA cells. The effects of NaB on HHUA and KK cell growth suggest that NaB may be a new therapeutic agent in cancer treatment.
ABSTRACT
The study of the relationship between trace elements and drug resistance of tumor has been going on for a long time.It is clear that some trace elements are related to the tumor occurrence and its progress, such as selenium,zinc,copper.So they can be used as an sub index to diagnosis and to evaluate prognosis. Further study in recent years has shown that trace elements are related to the tumor drug risistance. Improveing nourishment of tumor cells may change its drug resistance and influence the curative effect of tumor. The significance of this study is to search for a simple and approach in reducing drug resistance in order to improve the chemotherapeutic effect and the patient′s prognosis.
ABSTRACT
Purpose:To evaluate the effect of continuous intraperitoneal washing chemotherapy in treating the abdominal cavity tumor of nude mice with human ovarian epithelial cancer.Methods:The abdominal cavity tumor of nude mice models was established with human ovarian serous epithelial cancer cell line SKOV 3. 20 experimental nude mice were divided into 3 groups: the common treatment group(7 mice),the continuous washing intraperitoneal chemotherapy group(7 mice) and the control group(6 mice).All the mice were killed after two courses of treatment and the weight and volume of the cavity tumor were examined. The cell cycle expresstion rate of C erbB2 and Fas of abdominal neoplasms tissues in washing liquid were detected with FCM. Results:In the intraperitoneal washing group,the nude mice's FBW/IBW was 0.886. The volume of the cavity tumor is obviously smaller than the routine group. Significant difference in tumor growth inhibition rate was found between the routine group and the washing group.In the washing liquid, G 1 and S phase ratios were markedly lower ( P 0.05); C erbB2 rates were 66%、59% and 42% in control、common and washing group respectively, which was significant different between all groups ( P