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[Effect of Qingdu Suppository-containing serum on cervical carcinoma SiHa cell MDM2 gene expression]
1Department of Gynecology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing.
Objective:
To investigate the effect and mechanism of Qingdu Suppository (QDS) in suppressing the growth of SiHa cell of cervical carcinoma on the cytobiologic and molecular biologic level.
Methods:
SiHa cells were cultured in media with serum containing different concentrations of QDS and blank serum, as well as serum containing various Chinese herbal or Western drugs as positive control. SiHa cell growth and proliferation was determined by MTT assay, the cell cycle and apoptosis were analyzed by flow cytometry technique, and the expression of proto-oncogene MDM2 detected semi-quantitatively by RT-PCR.
Results:
The amount of cells decreased after cultured with drug-containing serum 8% in concentration, with the highest inhibitory effect shown by drug-containing serum after acting for 72 h, which was significantly different to that in the control group (P < 0.01). Among the various time phases of cell cycle, the percentage of cells in S phase was significantly decreased. Drug-containing serum showed somewhat effect on cell apoptosis, but no obvious regularity could be found. RT-PCR showed significant decrease of MDM2 expression.
Conclusion:
QDS containing serum could not only directly suppress the growth of cervical carcinoma cells, but also inhibit the tumor by the molecular mechanism of down-regulating MDM2 gene expression.
Insights
Qingdu Suppository (QDS) effectively suppresses cervical cancer cell growth by inhibiting MDM2 gene expression. This study reveals QDS
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Cervical carcinoma is a significant global health concern.
- Understanding the molecular mechanisms of anti-cancer agents is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the anti-cancer effects of Qingdu Suppository (QDS) on SiHa cervical carcinoma cells.
- To elucidate the cytobiologic and molecular mechanisms underlying QDS's action.
Main Methods:
- SiHa cells were treated with varying concentrations of QDS.
- Cell viability and proliferation were assessed using MTT assay.
- Cell cycle, apoptosis, and MDM2 gene expression were analyzed via flow cytometry and RT-PCR.
Main Results:
- QDS significantly inhibited SiHa cell growth and proliferation in a dose- and time-dependent manner.
- A notable decrease in cells within the S phase of the cell cycle was observed.
- RT-PCR analysis demonstrated a significant downregulation of MDM2 gene expression.
Conclusions:
- QDS exhibits direct suppressive effects on cervical carcinoma cell growth.
- The anti-cancer mechanism of QDS involves the downregulation of MDM2 gene expression.