Document Detail

Elliptically polarized magnetic fields do not alter immediate early response genes expression levels in human glioblastoma cells.
MedLine Citation:
PMID:  11835255     Owner:  NLM     Status:  MEDLINE    
Expression of immediate early response genes such as c-fos, c-jun, and c-myc in response to 1-500 microT resultant (r) 60 Hz elliptically polarized (EP) magnetic fields (MFs), typical of environmental MFs polarization under overhead power lines, was analyzed in both at transcriptional and translational levels using human glioblastoma (T98G) cells. Pseudo synchronized T98G cells at G1 phase were exposed to EP-MFs (1, 20, 100, and 500 microTr) for up to 3 h, but produced no statistical difference (P>0.05) in the levels of expression ratio at both the transcriptional and translational levels at 30 min for c-fos and c-jun and at 180 min for c-myc after serum stimulation. In addition, exposure of T98G cells to linearly (vertical and horizontal) and/or circularly polarized MFs (500 microTr) produced no significant change (P>0.05) in the expression ratio at both transcriptional and post-transcriptional levels. Thus, there was no evidence that linearly or rotating polarized MFs enhanced early response gene expression in these studies. These results suggest that environmental MFs at 1-500 microT flux density are unlikely to induce carcinogenesis through a mechanism involving altered expression of the immediate early response genes.
Hiroyuki Yomori; Katsuaki Yasunaga; Chie Takahashi; Ayako Tanaka; Shinji Takashima; Masaru Sekijima
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Bioelectromagnetics     Volume:  23     ISSN:  0197-8462     ISO Abbreviation:  Bioelectromagnetics     Publication Date:  2002 Feb 
Date Detail:
Created Date:  2002-02-08     Completed Date:  2002-04-19     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8008281     Medline TA:  Bioelectromagnetics     Country:  United States    
Other Details:
Languages:  eng     Pagination:  89-96     Citation Subset:  IM    
Copyright Information:
Copyright 2002 Wiley‐Liss, Inc.
Technical Research Center, The Kansai Electric Power Company, Inc., Hyogo, Japan.
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MeSH Terms
Blotting, Northern
Brain Neoplasms / genetics*
Electromagnetic Fields*
Gene Expression Regulation / radiation effects*
Genes, fos / genetics,  radiation effects
Genes, jun / genetics,  radiation effects
Genes, myc / genetics,  radiation effects
Glioblastoma / genetics*
RNA Processing, Post-Transcriptional / radiation effects
RNA, Ribosomal / genetics,  metabolism*
Transcription, Genetic / radiation effects*
Tumor Cells, Cultured
Reg. No./Substance:
0/RNA, Ribosomal

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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