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[Microwave radiation decreases the expressions of occludin and JAM-1 in rats]
Xiao-Fang Gao1, Shui-Ming Wang, Rui-Yun Peng
1Institute of Radiation Medicine, Academy of Military Medical Sciences, Beijing 100850, China.
Objective:
To explore the changes in the expressions of the tight junction related protein occludin and junctional adhesion molecule-1 (JAM-1) of the blood-testis barrier and their significance in rats after microwave radiation.
Methods:
Eighty male Wistar rats were exposed to microwave radiation with average power density of 0, 10, 30 and 100 mW/cm2 for five minutes, and dynamic changes in the expressions of testicular occludin and JAM-1 were observed by Western blot and image analysis at 6 h, 1 d, 3 d, 7 d and 14 d after the radiation.
Results:
There was a significant down-regulation in the expression of the occludin protein at 3 - 7 d, 6 h - 7 d and 6 h - 14 d (P < 0. 05), as well as in that of JAM-1 at 3 - 7 d, 1 - 7 d and 1-14 d (P < 0.05) after exposure to 10, 30 and 100 mW/cm2 microwave radiation.
Conclusion:
The decreased protein expressions of occludin and JAM-1 may play an important role in the microwave radiation induced-damage to the blood-testis barrier.
Insights
Microwave radiation exposure significantly reduced occludin and junctional adhesion molecule-1 (JAM-1) protein levels in rat testes. These changes indicate potential damage to the blood-testis barrier following microwave exposure.
Area of Science:
- Reproductive biology
- Toxicology
- Biochemistry
Background:
- The blood-testis barrier (BTB) is crucial for maintaining testicular function.
- Microwave radiation is a ubiquitous environmental exposure.
- Understanding the impact of microwave radiation on BTB integrity is important for male reproductive health.
Purpose of the Study:
- To investigate the effects of varying microwave radiation power densities on BTB protein expression in rats.
- To assess the dynamic changes in occludin and junctional adhesion molecule-1 (JAM-1) expression post-irradiation.
Main Methods:
- Eighty male Wistar rats were exposed to microwave radiation (0, 10, 30, 100 mW/cm2) for 5 minutes.
- Western blot and image analysis were used to quantify occludin and JAM-1 expression at multiple time points (6h, 1d, 3d, 7d, 14d).
Main Results:
- Significant down-regulation of occludin was observed at 3-7 days and 6h-14 days across radiation groups (P < 0.05).
- JAM-1 expression was significantly decreased at 3-7 days and 1-14 days post-exposure (P < 0.05).
- Dose-dependent effects were noted, with higher radiation levels causing more pronounced reductions.
Conclusions:
- Decreased expression of occludin and JAM-1 suggests compromised BTB integrity.
- Microwave radiation exposure may induce testicular damage by disrupting BTB-related proteins.
- Further research is warranted to elucidate the precise mechanisms of microwave-induced reproductive toxicity.
