Melatonin attenuates radiofrequency radiation (900 MHz)-induced oxidative stress, DNA damage and cell cycle arrest in germ cells of male Swiss albino mice.

Abstract

Increasing male infertility of unknown aetiology can be associated with environmental factors. Extensive use of mobile phones has exposed the general population to unprecedented levels of radiofrequency radiations (RFRs) that may adversely affect male reproductive health. Therefore, the present study investigated the effect of RFR Global System for Mobile communication (GSM) type, 900 MHz and melatonin supplementation on germ cell development during spermatogenesis. Swiss albino mice were divided into four groups. One group received RFR exposure for 3 h twice/day for 35 days and the other group received the same exposure but with melatonin ( N-acetyl-5-methoxytryptamine) (MEL; 5 mg/kg bw/day). Two other groups received only MEL or remain unexposed. Sperm head abnormality, total sperm count, biochemical assay for lipid peroxides, reduced glutathione, superoxide dismutase activity and testis histology were evaluated. Additionally, flow cytometric evaluation of germ cell subtypes and comet assay were performed in testis. Extensive DNA damage in germ cells of RFR-exposed animals along with arrest in pre-meiotic stages of spermatogenesis eventually leading to low sperm count and sperm head abnormalities were observed. Furthermore, biochemical assays revealed excess free radical generation resulting in histological and morphological changes in testis and germ cells morphology, respectively. However, these effects were either diminished or absent in RFR-exposed animals supplemented with melatonin. Hence, it can be concluded that melatonin inhibits pre-meiotic spermatogenesis arrest in male germ cells through its anti-oxidative potential and ability to improve DNA reparative pathways, leading to normal sperm count and sperm morphology in RFR-exposed animals.

• Authors: Neelam Pandey, Sarbani Giri
• Journal: Toxicology and industrial health (Toxicol Ind Health) Vol. 34 Issue 5 Pg. 315-327 (May 2018) ISSN: 1477-0393 [Electronic] England
• PMID: 29562845 (Publication Type: Journal Article)

Chemical References

• Antioxidants
• Superoxide Dismutase
• Glutathione
• Melatonin

Topics

• Animals
• Antioxidants (pharmacology)
• Cell Cycle Checkpoints (drug effects, radiation effects)
• Cell Phone
• Comet Assay
• DNA Damage (drug effects, radiation effects)
• Disease Models, Animal
• Germ Cells (drug effects, radiation effects)
• Glutathione (metabolism)
• Infertility, Male (chemically induced, drug therapy)
• Male
• Melatonin (pharmacology)
• Mice
• Oxidative Stress (drug effects, radiation effects)
• Radio Waves (adverse effects)
• Spermatogenesis (drug effects)
• Superoxide Dismutase (metabolism)