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Published on: February 16, 2015
Research on the A549 cell apoptosis mechanism of the nude mouse model using MenSC-sTRAIL
1Department of Respiratory Diseases, Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, China. wangjian160908@163.com.
Objective:
To investigate the inhibitory effect of MenSC-sTRAIL on the apoptosis of A549 cells of lung cancer in a nude mouse model and the relevant molecular mechanism.
Materials And Methods:
The tumorigenesis curve of A549 cells in the nude mouse model was assayed using the growth curve plotted by the growth rate of tumor of the A549 cell nude mouse model. Cellular apoptosis was assayed using flow cytometer and Annexin V-FITC, and the effect of MenSC-sTRAIL on the expression of Bax was measured using Western blot.
Results:
MenSC-sTRAIL promoted the apoptosis of A549 cells. Results of the quantitative assay using Annexin V-FITC further confirmed the effect of MenSC-sTRAIL on inducing the cellular apoptosis. Western-blot results showed that MenSC-sTRAIL increased the expression of Bax.
Conclusions:
MenSC-sTRAIL may vary the balance of regulation of heterodimer of Bcl-2 and Bax, which can induce the apoptosis of A549 cells.
Insights
MenSC-sTRAIL effectively induces apoptosis in lung cancer A549 cells within a nude mouse model. This therapy impacts the Bcl-2/Bax protein balance, promoting programmed cell death in cancer cells.
Area of Science:
- Oncology
- Cell Biology
- Molecular Medicine
Background:
- Lung cancer remains a leading cause of cancer-related mortality worldwide.
- Targeted therapies are crucial for improving treatment outcomes.
- Understanding apoptosis-inducing mechanisms is key for novel therapeutic development.
Purpose of the Study:
- To evaluate the anti-cancer effects of MenSC-sTRAIL on A549 lung cancer cells.
- To investigate the molecular mechanisms underlying MenSC-sTRAIL-induced apoptosis.
- To assess MenSC-sTRAIL efficacy in a preclinical nude mouse model.
Main Methods:
- Tumor growth kinetics were monitored in A549 cell xenografts in nude mice.
- Cellular apoptosis was quantified using flow cytometry with Annexin V-FITC staining.
- Western blot analysis was employed to measure Bax protein expression levels.
Main Results:
- MenSC-sTRAIL significantly promoted apoptosis in A549 lung cancer cells.
- Quantitative assays confirmed MenSC-sTRAIL's role in inducing cellular apoptosis.
- Western blot analysis revealed that MenSC-sTRAIL upregulates the expression of the pro-apoptotic protein Bax.
Conclusions:
- MenSC-sTRAIL demonstrates potential as an apoptosis-inducing agent for lung cancer.
- The mechanism involves modulating the Bcl-2/Bax heterodimer balance, favoring apoptosis.
- Further research into MenSC-sTRAIL could lead to new lung cancer treatment strategies.
