Format

Send to

Choose Destination
See comment in PubMed Commons below
Toxicol Lett. 2014 Aug 4;228(3):216-24. doi: 10.1016/j.toxlet.2014.05.004. Epub 2014 May 9.

The protective effect of autophagy on mouse spermatocyte derived cells exposure to 1800MHz radiofrequency electromagnetic radiation.

Author information

  • 1Institute of Computing Medicine, Third Military Medical University, Chongqing, 400038, China; Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: liu.kaijun@yahoo.com.
  • 2Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: zhangguowei.2009@163.com.
  • 3Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: 987137630@qq.com.
  • 4Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: ancyliu521@126.com.
  • 5Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: jianyun564@163.com.
  • 6Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: momomei198@sina.com.
  • 7Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: jinyiliutmmu@163.com.
  • 8Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: caojia1962@126.com.
  • 9Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: aolin117@163.com.
  • 10Institute of Computing Medicine, Third Military Medical University, Chongqing, 400038, China. Electronic address: zhangsx1021@yahoo.com.

Abstract

The increasing exposure to radiofrequency (RF) radiation emitted from mobile phone use has raised public concern regarding the biological effects of RF exposure on the male reproductive system. Autophagy contributes to maintaining intracellular homeostasis under environmental stress. To clarify whether RF exposure could induce autophagy in the spermatocyte, mouse spermatocyte-derived cells (GC-2) were exposed to 1800MHz Global System for Mobile Communication (GSM) signals in GSM-Talk mode at specific absorption rate (SAR) values of 1w/kg, 2w/kg or 4w/kg for 24h, respectively. The results indicated that the expression of LC3-II increased in a dose- and time-dependent manner with RF exposure, and showed a significant change at the SAR value of 4w/kg. The autophagosome formation and the occurrence of autophagy were further confirmed by GFP-LC3 transient transfection assay and transmission electron microscopy (TEM) analysis. Furthermore, the conversion of LC3-I to LC3-II was enhanced by co-treatment with Chloroquine (CQ), indicating autophagic flux could be enhanced by RF exposure. Intracellular ROS levels significantly increased in a dose- and time-dependent manner after cells were exposed to RF. Pretreatment with anti-oxidative NAC obviously decreased the conversion of LC3-I to LC3-II and attenuated the degradation of p62 induced by RF exposure. Meanwhile, phosphorylated extracellular-signal-regulated kinase (ERK) significantly increased after RF exposure at the SAR value of 2w/kg and 4w/kg. Moreover, we observed that RF exposure did not increase the percentage of apoptotic cells, but inhibition of autophagy could increase the percentage of apoptotic cells. These findings suggested that autophagy flux could be enhanced by 1800MHz GSM exposure (4w/kg), which is mediated by ROS generation. Autophagy may play an important role in preventing cells from apoptotic cell death under RF exposure stress.

KEYWORDS:

Autophagy; ROS; Radiofrequency electromagnetic field

PMID:
24813634
DOI:
10.1016/j.toxlet.2014.05.004
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center