Effects of 2.45 GHz microwave radiation and heat on mouse spermatogenic epithelium.

International journal of radiation biology and related studies in physics, chemistry, and medicine · 1981 · Harm · Low evidence

← Research stream

HarmLow evidencePaper 6005

Study snapshot

PublicationInternational journal of radiation biology and related studies in physics, chemistry, and medicine · 1981

Study typeanimal

Reported directionHarm

Evidence ratingLow

Abstract

The rear halves of the bodies of anaesthetized male C3H mice were exposed for 30 min to 2.45 GHz microwave radiation and the effects on the testes were compared to those produced by direct heating. Effects were observed which are consistent with the hypothesis that heat damage is the primary effect of microwave exposure. Damage measured six days after exposure ranged in severity from depletion of the spermatocytes to extensive necrosis of the germinal epithelium. Temperature-sensitive probes implanted in the testes revealed a threshold effect for depletion of the spermatocytes of approximately 39 degrees C and an LD50 6 (50 per cent cell death after 6 days) of about 41 degrees C after microwave exposure or direct heating. The corresponding effective threshold effect and LD50 6 expressed in terms of absorbed microwave power were 20 W kg-1 and 30 W kg-1. However, it is probable that a conscious animal is better able to regulate testicular temperature and hence adjust to higher dose-rates.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal

Effect directionharm

PopulationAnaesthetized male C3H mice

Sample sizeNot supplied

Exposuremicrowave · 2450 MHz · 30 min

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Male C3H mice exposed for 30 min to 2.45 GHz microwave radiation showed testicular damage measured 6 days later, ranging from spermatocyte depletion to extensive necrosis of the germinal epithelium. Implanted probes indicated a threshold for spermatocyte depletion at ~39°C and an LD50 at ~41°C, similar for microwave exposure and direct heating, consistent with heat being the primary effect; corresponding absorbed microwave power thresholds were reported as 20 W/kg (threshold) and 30 W/kg (LD50).

Outcomes measured

Testicular/germinal epithelium damage
Depletion of spermatocytes
Necrosis of germinal epithelium
Testicular temperature thresholds
LD50 (cell death at 6 days)

Limitations

Sample size not reported in abstract
Exposure conditions beyond frequency and duration (e.g., field strength, dosimetry details) not fully described in abstract
Animals were anaesthetized; authors note conscious animals may regulate testicular temperature differently

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": 2450,
    "sar_wkg": null,
    "duration": "30 min"
  },
  "population": "Anaesthetized male C3H mice",
  "sample_size": null,
  "outcomes": [
    "Testicular/germinal epithelium damage",
    "Depletion of spermatocytes",
    "Necrosis of germinal epithelium",
    "Testicular temperature thresholds",
    "LD50 (cell death at 6 days)"
  ],
  "main_findings": "Male C3H mice exposed for 30 min to 2.45 GHz microwave radiation showed testicular damage measured 6 days later, ranging from spermatocyte depletion to extensive necrosis of the germinal epithelium. Implanted probes indicated a threshold for spermatocyte depletion at ~39°C and an LD50 at ~41°C, similar for microwave exposure and direct heating, consistent with heat being the primary effect; corresponding absorbed microwave power thresholds were reported as 20 W/kg (threshold) and 30 W/kg (LD50).",
  "effect_direction": "harm",
  "limitations": [
    "Sample size not reported in abstract",
    "Exposure conditions beyond frequency and duration (e.g., field strength, dosimetry details) not fully described in abstract",
    "Animals were anaesthetized; authors note conscious animals may regulate testicular temperature differently"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "2.45 GHz",
    "microwave radiation",
    "mouse",
    "testis",
    "spermatogenic epithelium",
    "heat",
    "thermal effects",
    "spermatocytes",
    "necrosis",
    "LD50"
  ],
  "suggested_hubs": []
}

AI can be wrong. Always verify against the paper.

AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1080/09553008114551611
PubMed: 6978299

Read the original paper →

Related papers

← Back to the Research Library