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The influence of simulated microgravity on proliferation and apoptosis in U251 glioma cells
Jiao Zhao1, He Ma2, Leitao Wu1
1Department of Traditional Chinese Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.
Abstract:
Several studies have indicated that microgravity can influence cellular progression, proliferation, and apoptosis in tumor cell lines. In this study, we observed that simulated microgravity inhibited proliferation and induced apoptosis in U251 malignant glioma (U251MG) cells. Furthermore, expression of the apoptosis-associated proteins, p21 and insulin-like growth factor binding protein-2 (IGFBP-2), was upregulated and downregulated, respectively, following exposure to simulated microgravity. These findings indicate that simulated microgravity inhibits proliferation while inducing apoptosis of U251MG cells. The associated effects appear to be mediated by inhibition of IGFBP-2 expression and stimulation of p21 expression. This suggests that simulated microgravity might represent a promising method to discover new targets for glioma therapeutic strategy.
Insights
Simulated microgravity inhibits malignant glioma cell proliferation and triggers apoptosis. This effect is linked to altered expression of p21 and insulin-like growth factor binding protein-2 (IGFBP-2), suggesting new therapeutic targets.
Area of Science:
- Oncology
- Cell Biology
- Space Medicine
Background:
- Microgravity is known to affect cellular processes, including proliferation and apoptosis in cancer cells.
- Malignant gliomas are aggressive brain tumors with limited treatment options.
Purpose of the Study:
- To investigate the effects of simulated microgravity on U251 malignant glioma (U251MG) cells.
- To explore the molecular mechanisms underlying microgravity-induced changes in glioma cells.
Main Methods:
- Exposure of U251MG cells to simulated microgravity conditions.
- Analysis of cell proliferation and apoptosis rates.
- Assessment of apoptosis-associated protein expression (p21 and IGFBP-2).
Main Results:
- Simulated microgravity significantly inhibited proliferation in U251MG cells.
- Exposure to simulated microgravity induced apoptosis in U251MG cells.
- p21 expression was upregulated, while IGFBP-2 expression was downregulated.
Conclusions:
- Simulated microgravity inhibits proliferation and induces apoptosis in malignant glioma cells.
- The observed effects are mediated by the modulation of p21 and IGFBP-2 expression.
- Microgravity may offer novel therapeutic strategies for glioma treatment.
