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[Studies on apoptosis of human lung adenocarcinoma cells induced by oltipraz]
1Cancer Institute and Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021.
Objective:
To study whether oltipraz can induce apoptosis of human lung adenocarcinoma (GLC-82) cells and its possible mechanism.
Methods:
Light microscopy, DNA electrophoresis, flow cytometry and video time-lapse monitoring were used to observe apoptosis of GLC-82 induced by oltipraz.
Results:
GLC-82 cells treated with oltipraz underwent the arrest of cell mitosis at metaphase, higher percentage of G(2)/M and peak of apoptosis were found, and cell body shrunk, nuclear chromosome condensed or fragmented and nuclear DNA fragment displayed "laden" bands in apoptic cells. Apoptosis of GLC-82 induced by oltipraz was more obvious at a concentration of 120 microg/ml.
Conclusion:
Oltipraz could induce apoptosis of GLC-82 at certain concentrations, which associated closely with the arrest of mitotic cycle.
Insights
Oltipraz effectively induces apoptosis in human lung adenocarcinoma (GLC-82) cells by arresting the mitotic cycle. This finding offers potential therapeutic insights for lung cancer treatment.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Lung adenocarcinoma is a significant cause of cancer-related mortality.
- Understanding novel therapeutic agents for lung cancer is crucial.
Purpose of the Study:
- To investigate the apoptotic effects of oltipraz on human lung adenocarcinoma (GLC-82) cells.
- To elucidate the underlying mechanism of oltipraz-induced apoptosis.
Main Methods:
- Utilized light microscopy, DNA electrophoresis, and flow cytometry.
- Employed video time-lapse monitoring to observe cellular changes.
- Assessed apoptosis induction in GLC-82 cells treated with oltipraz.
Main Results:
- Oltipraz treatment led to mitotic arrest at metaphase and an increased percentage of cells in the G(2)/M phase.
- Observed characteristic apoptotic features including cell shrinkage and DNA fragmentation.
- The most pronounced apoptotic effect was noted at an oltipraz concentration of 120 µg/ml.
Conclusions:
- Oltipraz demonstrably induces apoptosis in GLC-82 cells at specific concentrations.
- The apoptotic process is closely linked to the observed arrest of the mitotic cycle.
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