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Gene expression changes in the pituitary gland of rats exposed to electromagnetic pulses
YuHong Qi1, Jun Liang, YanPing Hui
1Department of Radiotherapy, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, Shaanxi, China.
Objective:
We examined alterations in the expression of tumorigenesis-related genes in the pituitary gland of rats exposed to electromagnetic pulses (EMP).
Methods:
The global gene expression profiles of the pituitary gland in EMP-exposed and control groups were detected by cDNA microarray analysis. We then validated and further investigated the reduced expression of two tumorigenesis-related genes, Pten, and Jund, by assessing their mRNA and protein expression by quantitative real-time-PCR, western blotting, and immunohistochemistry in the pituitary gland of rats 6 months after exposure to EMP.
Results:
EMP exposure induced genome-wide gene expression changes in the rat pituitary gland. There was decreased expression of the Pten and Jund mRNAs and proteins in EMP-exposed rats compared with in unexposed control animals.
Conclusion:
EMP exposure alters the expression of tumorigenesis-related genes in the pituitary gland. These tumorigenesis-related genes are potentially involved in the development of pituitary gland tumors in rats.
Insights
Electromagnetic pulses (EMP) altered tumorigenesis-related gene expression in rat pituitary glands. This suggests EMP exposure may contribute to pituitary tumor development.
Area of Science:
- Molecular biology
- Toxicology
- Endocrinology
Background:
- Electromagnetic pulses (EMP) are a growing environmental concern.
- The effects of EMP on endocrine glands, specifically the pituitary, are not well understood.
- Tumorigenesis-related genes play a critical role in cancer development.
Purpose of the Study:
- To investigate the impact of EMP exposure on gene expression in the rat pituitary gland.
- To identify specific tumorigenesis-related genes affected by EMP.
- To assess the potential role of these altered genes in pituitary tumor development.
Main Methods:
- Global gene expression profiling using cDNA microarray analysis in EMP-exposed and control rats.
- Validation of altered gene expression for Pten and Jund using quantitative real-time-PCR (qRT-PCR) and Western blotting.
- Immunohistochemistry was employed to assess protein expression levels in the pituitary gland 6 months post-exposure.
Main Results:
- EMP exposure induced significant genome-wide gene expression changes in the rat pituitary gland.
- A notable decrease in both mRNA and protein expression of Pten and Jund was observed in EMP-exposed rats.
- These findings indicate a specific downregulation of key tumorigenesis-related genes following EMP exposure.
Conclusions:
- EMP exposure demonstrably alters the expression of tumorigenesis-related genes within the pituitary gland.
- The identified downregulated genes, Pten and Jund, are potentially implicated in the pathogenesis of pituitary gland tumors.
- Further research is warranted to elucidate the precise mechanisms linking EMP exposure to pituitary tumorigenesis.
