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Results of laboratory studies on RF fields Prof. Dr. Alexander Lerchl Jacobs University Bremen, Germany Head , Commission on Non-Ionizing Radiation, German Radiation Protection Board (SSK). Actions of EMF on Organisms – Theoretical Targets. Cancer. Brain ( e.g ., Growth Hormone,

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slide1

Results of laboratory studies on RF fields

Prof. Dr. Alexander Lerchl

Jacobs University Bremen, Germany

Head, Commission on Non-Ionizing Radiation,

German Radiation Protection Board (SSK)

actions of emf on organisms theoretical targets
Actions of EMF on Organisms– TheoreticalTargets

Cancer

Brain (e.g., Growth Hormone,

LH, TSH, TRH, Melatonin)

Thyroid Gland (Thyroxin)

Whole Body (e.g., Temperature,

Metabolism)

Reproductive Organs (e.g, Testosterone,

Estrogens)

actions of emf theoretical mechanisms
Actions of EMF – TheoreticalMechanisms

WHO Research

Agenda for

Radiofrequency

Electromagnetic

Fields, 2010

studies in akr j mice 900 mhz
Studies in AKR/J Mice (900 MHz)

N=160 / group; SAR = 0.4 W/kg (24/7)

Blindeddesign

Sommer et al., BMC Cancer 4 (2005): 77

studies in akr j mice 900 mhz1
Studies in AKR/J Mice (900 MHz)

N=160 / group; SAR = 0.4 W/kg (24/7)

Blindeddesign

Sommer et al., BMC Cancer 4 (2005): 77

studies in akr j mice 900 mhz2
Studies in AKR/J Mice (900 MHz)

P<0.01

N=160 / group; SAR = 0.4 W/kg (24/7)

Blindeddesign

Sommer et al., BMC Cancer 4 (2005): 77

studies in akr j mice 1966 mhz umts
Studies in AKR/J Mice (1966 MHz; UMTS)

N=160 / group; SAR = 0.4 W/kg (24/7)

Blindeddesign

Sommer et al., Radiat Res 168 (2007): 72 - 80

studies in akr j mice 1966 mhz umts1
Studies in AKR/J Mice (1966 MHz; UMTS)

n.s.

N=160 / group; SAR = 0.4 W/kg (24/7)

Blindeddesign

Sommer et al., Radiat Res 168 (2007): 72 - 80

mice multigeneration study 1966 mhz umts
Mice Multigeneration Study(1966 MHz; UMTS)

N=32 pairs (2 females, 1 male) per group; 4 exposuregroups (0, 0.08, 0.4, 1.3 W/kg);

4 generations; exposure 24/7; blindeddesign

mice multigeneration study 1966 mhz umts1
Mice Multigeneration Study(1966 MHz; UMTS)

Sommer et al., Radiat Res 171 (2009) 89-95

mice multigeneration study 1966 mhz umts2
Mice Multigeneration Study(1966 MHz; UMTS)

Sommer et al., Radiat Res 171 (2009) 89-95

mice multigeneration study 1966 mhz umts3
Mice Multigeneration Study(1966 MHz; UMTS)

Sommer et al., Radiat Res 171 (2009) 89-95

effects of head only exposure 900 mhz on development learning and memory in rats2
Effects of Head-OnlyExposure (900 MHz) on Development, Learning and Memory in Rats
  • N = 24 rats per group
  • SAR (brain) = 0, 0.4, 2 and 10 W/kg (blinded)
  • Exposure 2 h / day, 5 days / week
  • Exposurestarted at an age of 14 days (!)
  • Battery of behavioraltests:
    • 8-arm maze
    • Rotarodwheel
    • Open field
    • Water maze

3 timesduringexperiment:

- juvenile (completed)- adult- pre-senile

odds ratios
OddsRatios

OR=1: Control

Significantlyhigher

Significantlylower

A

B

C

Condition (e.g., exposure)

Oddsratio

95 % confidenceinterval (depends on groupsize!)

b rain tumor promotion in rodents
Brain Tumor Promotion in Rodents

Repacholi et al., 2012

pituitary tumors in rodents
Pituitary Tumors in Rodents

Repacholi et al., 2012

conclusions
Conclusions
  • Studieslooking at theeffects of electromagneticfields in rodents so far didnotindicate an increasedriskforvariouscancers, even at levels well abovetherecommendedexposure limits.
  • Chronicexposure of AKR/J or normal mice (in a multigeneration study) revealed no adverseeffects on healthordevelopment at rather high SAR values.
  • Althoughanimalstudiesarelimitedwithrespect to humans, theyaddweight on thegeneralconclusionthat cancerogenic effects of EMF arehighlyunlikely.
acknowledgements
Acknowledgements
  • Projects funded by the Bundesamt für Strahlenschutz (BfS), Germany
  • Dr. Melanie Klose, Dr. Angela Sommer, Dr. Kirsten Schwarzpaul, Karen Grote, Thomas Ströhlein (Jacobs University)
  • Nina Kloss (Jacobs University, 2nd yearundergraduate, project on temperatures)
  • Volkert Hansen, Joachim Streckert, Andreas Bitz (Universities Wuppertal and Essen)
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