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[Pharmacological PI 3-kinase inhibitors induce radioprotective effect in Drosophila melanogaster imago]
Abstract:
Phosphatidylinositol 3-kinase (PI3K) signaling cascade is involved in many cell processes that are required for radioresistance, including proliferation, survival, growth, metabolism, and death. At the whole organism level PI3K signaling cascade is involved in lifespan control. In this study the contribution of PI3-signaling cascade to radioresistance of Drosophila melanogaster imago was investigated. It is shown that pretreatment with Pl3-kinase specific inhibitor LY294002 (5, 100 micromol/l) and wortmannin (5 micromol/1) leads to increase of male and female survival after acute irradiation in dose of 30 Gy. The obtained results demonstrate that PI3K specific inhibition induces radioprotective effect on Drosophila melanogaster imago.
Insights
Inhibiting the Phosphatidylinositol 3-kinase (PI3K) signaling pathway enhances survival in fruit flies after radiation exposure. This suggests PI3K inhibition offers a radioprotective effect in adult Drosophila melanogaster.
Area of Science:
- Cellular signaling pathways
- Radiation biology
- Model organism research
Background:
- Phosphatidylinositol 3-kinase (PI3K) signaling is crucial for cellular processes like survival, proliferation, and metabolism.
- This pathway also plays a role in lifespan regulation at the organismal level.
- Understanding PI3K's role in radioresistance is important for developing protective strategies.
Purpose of the Study:
- To investigate the role of the PI3K signaling cascade in the radioresistance of adult fruit flies (Drosophila melanogaster).
- To determine if inhibiting PI3K can confer a radioprotective effect.
Main Methods:
- Adult male and female Drosophila melanogaster were pretreated with PI3K-specific inhibitors LY294002 and wortmannin.
- Flies were subsequently exposed to acute irradiation at a dose of 30 Gray (Gy).
- Survival rates of irradiated flies were monitored and compared to control groups.
Main Results:
- Pretreatment with LY294002 (5 and 100 micromol/l) significantly increased survival rates in both male and female flies post-irradiation.
- Pretreatment with wortmannin (5 micromol/l) also led to enhanced survival.
- These findings indicate a direct link between PI3K inhibition and increased radioresistance.
Conclusions:
- Specific inhibition of the PI3K signaling cascade confers a radioprotective effect in Drosophila melanogaster imago.
- Targeting PI3K may represent a viable strategy for mitigating radiation damage.
- Further research into PI3K's role in radioresistance could have implications for radiation protection.
