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Apoptotic activity of genistein on human lung adenocarcinoma SPC-A-1 cells and preliminary exploration of its
Huafei Zou1, Shuxuan Zhan, Kaiming Cao
1State Key Laboratory of Genetic Engineering, Department of Biochemistry, School of Life Sciences, Fudan University, 220 Handan Road, Shanghai 200433, PR China.
Abstract:
Soy isoflavone genistein is active against certain solid malignancies, but its direct effect on lung adenocarcinoma and its mechanisms of action remain to be elucidated. In the present study, using the human lung adenocarcinoma cell line SPC-A-1, we found that genistein decreased SPC-A-1 cell viability in both a dose and time dependent manner. Flow cytometry analysis revealed that genistein significantly induced arrest of SPC-A-1 cells at the G2/M phase of the cell cycle. Furthermore, through DNA fragmentation and TUNEL assays, we demonstrated that the addition of genistein led to SPC-A-1 apoptosis in both a dose and time dependent manner. Finally, the apoptosis pathway-related gene expression profile affected by genistein was investigated using the oligonucleotide microarray method. The result showed that the expression profile of 20 genes (ratio of genistein group/control group >2 or <0.5) related to the apoptotic pathways changed. These genes, mainly consisting of the Bcl-2 family and TNF ligand and receptor family, are involved in regulation of the apoptosis process.
Insights
Soy isoflavone genistein effectively reduced lung adenocarcinoma cell viability and induced apoptosis. Genistein also altered gene expression in apoptosis pathways, offering potential therapeutic insights.
Area of Science:
- Molecular Biology
- Cancer Research
- Pharmacology
Background:
- Soy isoflavone genistein exhibits activity against solid tumors.
- The specific effects and mechanisms of genistein on lung adenocarcinoma are not fully understood.
Purpose of the Study:
- To investigate the direct effects of genistein on human lung adenocarcinoma SPC-A-1 cells.
- To elucidate the mechanisms underlying genistein's action, including cell cycle arrest and apoptosis.
Main Methods:
- Utilized human lung adenocarcinoma SPC-A-1 cell line.
- Assessed cell viability, cell cycle progression via flow cytometry, and apoptosis using DNA fragmentation and TUNEL assays.
- Analyzed gene expression profiles related to apoptosis using oligonucleotide microarrays.
Main Results:
- Genistein significantly decreased SPC-A-1 cell viability in a dose- and time-dependent manner.
- Genistein induced G2/M phase cell cycle arrest and promoted apoptosis.
- Microarray analysis revealed altered expression of 20 apoptosis-related genes, including Bcl-2 and TNF family members.
Conclusions:
- Genistein exhibits anti-cancer properties against lung adenocarcinoma by inducing cell cycle arrest and apoptosis.
- Genistein modulates key genes in apoptosis pathways, suggesting a potential therapeutic role in lung adenocarcinoma treatment.
