16
Apr
2006

Effects of intensive and moderate cellular phone use on hearing function

Electromagn Biol Med. 2006;25(1):13-21. Related Articles, Links

Oktay MF, Dasdag S.

Department of Otolaryngology, Medical School of Dicle University, Diyarbakir, Turkey.

The purpose of this study is to investigate the effects of radiation emitted by mobile phones on the hearing of users. The study was carried out on three groups: 1) 20 men who have used a cellular phone frequently and spoken approximately 2 h per day for four years; 2) 20 men who have used a cellular phone for 10-20 min per day for four years; and 3) 20 healthy men who have never used a cellular phone (the control group). Brainstem evoked response audiometric (BERA) and pure tone audiometric (PTA) methods were used to measure the effects of exposure on hearing function of the subjects. In BERA measurements, I-III, III-V, and I-V interpeak latencies were evaluated. Interpeak latency of subjects in two experimental groups was compared to that of subjects in the control group. The BERA results showed no differences among the groups (p > 0.05). In PTA measurements, detection thresholds at 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz, and 8000 Hz frequencies were measured in all three groups. No differences were observed between moderate mobile phone users (10-20 min. per day) and control subjects. However, detection thresholds in those who talked approximately 2 h per day were found to be higher than those in either moderate users or control subjects. Differences at 4000 Hz for both bone and air conduction for right ears, and 500 Hz, and 4000 Hz bone and air conduction for left ears were significant for mean hearing threshold. This study shows that a higher degree of hearing loss is associated with long-term exposure to electromagnetic (EM) field generated by cellular phones.

PMID: 16595330 [PubMed - in process]

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=16595330&query_hl=1&itool=pubmed_docsum

Immunotropic influence of 900 MHz microwave GSM signal on human blood immune cells activated in vitro

Electromagn Biol Med. 2006;25(1):45-51. Related Articles, Links

Stankiewicz W, Dabrowski MP, Kubacki R, Sobiczewska E, Szmigielski S.

Department of Microwave Safety, Military Institute of Hygiene and Epidemiology, Warsaw, Poland.

In an earlier study we reported that G(o) phase peripheral blood mononulclear cells (PBMC) exposed to low-level (SAR = 0.18 W/kg) pulse-modulated 1300 MHz microwaves and subsequently cultured, demonstrate changed immune activity (Dabrowski et al., 2003). We investigated whether cultured immune cells induced into the active phases of cell cycle (G(1), S) and then exposed to microwaves will also be sensitive to electromagnetic field. An anechoic chamber of our design containing a microplate with cultured cells and an antenna emitting microwaves (900 MHz simulated GSM signal, 27 V/m, SAR 0.024 W/kg) was placed inside the ASSAB incubator. The microcultures of PBMC exposed to microwaves demonstrated significantly higher response to mitogens and higher immunogenic activity of monocytes (LM index) than control cultures. LM index, described in detail elsewhere (Dabrowski et al., 2001), represents the monokine influence on lymphocyte mitogenic response. The results suggest that immune activity of responding lymphocytes and monocytes can be additionally intensified by 900 MHz microwaves.

PMID: 16595333 [PubMed - in process]

http://eutils.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=16595333&itool=pubmed_DocSum

Cardiovascular risk in operators under radiofrequency electromagnetic radiation

Int J Hyg Environ Health. 2006 Mar;209(2):133-8. Epub 2005 Nov 10.

Vangelova K, Deyanov C, Israel M.

National Center of Public Health Protection, 15 Akademik Ivan Geshov Boul., 1431 Sofia, Bulgaria. KatiaVangelova@yahoo.com

The aim of the study was to assess the long-term effects of radiofrequency electromagnetic radiation (EMR) on the cardiovascular system. Two groups of exposed operators (49 broadcasting (BC) station and 61 TV station operators) and a control group of 110 radiorelay station operators, matched by sex and age, with similar job characteristics except for the radiofrequency EMR were studied. The EMR exposure was assessed and the time-weighted average (TWA) was calculated. The cardiovascular risk factors arterial pressure, lipid profile, body mass index, waist/hip ratio, smoking, and family history of cardiovascular disease were followed. The systolic and diastolic blood pressure (SBP and DBP), total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) were significantly higher in the two exposed groups. It was found that the radiofrequency EMR exposure was associated with greater chance of becoming hypertensive and dyslipidemic. The stepwise multiple regression equations showed that the SBP and TWA predicted the high TC and high LDL-C, while the TC, age and abdominal obesity were predictors for high SBP and DBP. In conclusion, our data show that the radiofrequency EMR contributes to adverse effects on the cardiovascular system.

PMID: 16503299 [PubMed - in process]

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?
cmd=Retrieve&db=PubMed&list_uids=16503299&dopt=Abstract

--------

I believe we may find that chronic EMR exposure changes gene expression, notably disrupting enzymes such as nitric oxide synthase. The cardiovascular system depends on nitric oxide for two reasons: vasodilation and heart-rate regulation. Around new masts we have seen heart palpitations, unexplained
(by reason of arterial condition, propensity etc.) heart attacks, and blood pressure problems.

Please ask if anyone wants the details of peer-reviewed research to back this view..

Andy


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