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Effect of Low-Intensity Microwave Radiation on Monoamine Neurotransmitters and Their Key Regulating Enzymes in Rat Brain.

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Megha K, Deshmukh PS, Ravi AK, Tripathi AK, Abegaonkar MP, Banerjee BD · 2015

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Microwave-exposed rats showed significant reductions in dopamine, norepinephrine, epinephrine, and serotonin in the hippocampus, along with downregulated gene expression of key regulating enzymes.

Plain English Summary

Summary written for general audiences

Researchers exposed Fischer rats to 900 MHz and 1800 MHz microwave radiation for 30 days at 2 hours per day, 5 days per week, with specific absorption rates of 5.953 × 10−4 and 5.835 × 10−4 W/kg respectively. Levels of dopamine, norepinephrine, epinephrine, and serotonin were measured in the hippocampus using LC–MS/MS. Exposed animals showed significant reductions in DA, NE, E and 5-HT, and significant downregulation in mRNA expression of TH, TPH1, and TPH2 compared with sham-exposed animals (p < 0.05).

Why This Matters

The study measured neurotransmitter levels at both the protein level and at the mRNA level of the enzymes that produce them. Tyrosine hydroxylase regulates dopamine, norepinephrine, and epinephrine, while tryptophan hydroxylase (TPH1 and TPH2) regulates serotonin. The results indicate that low-intensity microwave radiation may cause learning and memory disturbances by altering levels of brain monoamine neurotransmitters at mRNA and protein levels.

Exposure Details

SAR
0.0005953 & 0.0005835 W/kg
Source/Device
900 MHz and 1800 MHz
Exposure Duration
30 days (2 h/day, 5 days/week)

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.0005953 & 0.0005835 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects documented below the Building Biology "No Concern" threshold (0.001 W/kg)FCC limit is 2,742 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz - 1.80 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHz - 1.80 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

The aim of the study was to demonstrate the effect of low-intensity microwave radiation on levels of monoamine neurotransmitters and gene expression of their key regulating enzymes in brain of Fischer rats.

Animals were exposed to 900 MHz and 1800 MHz microwave radiation for 30 days (2 h/day, 5 days/week) ...

Results showed significant reduction in levels of DA, NE, E and 5-HT in hippocampus of microwave-exp...

In conclusion, the results indicate that low-intensity microwave radiation may cause learning and memory disturbances by altering levels of brain monoamine neurotransmitters at mRNA and protein levels.

Cite This Study
Megha K, Deshmukh PS, Ravi AK, Tripathi AK, Abegaonkar MP, Banerjee BD (2015). Effect of Low-Intensity Microwave Radiation on Monoamine Neurotransmitters and Their Key Regulating Enzymes in Rat Brain. Cell Biochem Biophys. 73(1):93-100,2015 .
Show BibTeX
@article{k_2015_effect_of_lowintensity_microwave_145,
  author = {Megha K and Deshmukh PS and Ravi AK and Tripathi AK and Abegaonkar MP and Banerjee BD},
  title = {Effect of Low-Intensity Microwave Radiation on Monoamine Neurotransmitters and Their Key Regulating Enzymes in Rat Brain.},
  year = {2015},
  doi = {10.1007/s12013-015-0576-x},
  url = {https://link.springer.com/article/10.1007/s12013-015-0576-x},
}

Quick Questions About This Study

Rats were exposed to 900 MHz and 1800 MHz microwave radiation.
Significant reductions were found in dopamine, norepinephrine, epinephrine, and serotonin in the hippocampus of exposed animals.
Significant downregulation in mRNA expression of TH, TPH1, and TPH2 was observed in microwave-exposed animals (p < 0.05).
The results indicate that low-intensity microwave radiation may cause learning and memory disturbances by altering levels of brain monoamine neurotransmitters.
Neurotransmitter levels were measured in the hippocampus of the experimental animals.