RF Safe

The effect of 2450-MHz microwave radiation during microtubular polymerization in vitro.

Radiation research · 1983 · No effect · Low evidence

← Research stream
No effectLow evidencePaper 5953

In vitro exposure to 2450 MHz continuous-wave microwaves during stages of the microtubule polymerization cycle showed no change in baseline turbidity or light-scattering properties at 20 or 200 mW/g SAR. EGTA-induced polymerization and cold-induced depolymeri…

Study snapshot

PublicationRadiation research · 1983
Study typein_vitro
Reported directionNo effect
Evidence ratingLow

Abstract

Exposure to 2450-MHz (cw) microwave radiation causes inhibition of cell division in intact cells and varied in vivo biological effects in both avian and mammalian species. Because these reported effects may result from alterations in the dynamics of microtubule formation, we studied the effects of simultaneous microwave exposure (2450 MHz, cw) during each of the three critical stages of the intracellar polymerization cycle. In addition, using circular dichroism spectroscopy, we studied the effect of microwave irradiation on the secondary structure of purified tubulin polypeptides. These studies were accomplished using specially constructed exposure systems that permit the continuous recording of turbidometric or circular dichroism measurements during simultaneous exposure to microwaves. The baseline turbidity of microtubular protein did not change under the influence of microwave radiation (20 or 200 mW/g SAR) and irradiation had no effect on the light-scattering properties of the depolymerized protein. EGTA-induced polymerization and cold-induced depolymerization patterns were also similar for both control and microwave-irradiated samples. The circular dichroism spectrum of purified tubulin also did not appear to be influenced by microwave irradiation, indicating a lack of effect on the protein secondary structure. The data suggest that the cellular effects of microwaves are not due to changes in microtubular proteins or their rate of polymerization.

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 typein_vitro
Effect directionno_effect
PopulationNot supplied
Sample sizeNot supplied
Exposuremicrowave · 2450 MHz
Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

In vitro exposure to 2450 MHz continuous-wave microwaves during stages of the microtubule polymerization cycle showed no change in baseline turbidity or light-scattering properties at 20 or 200 mW/g SAR. EGTA-induced polymerization and cold-induced depolymerization patterns were similar between control and exposed samples, and circular dichroism spectra of purified tubulin were not influenced, suggesting no effect on tubulin secondary structure.

Outcomes measured

  • microtubule/tubulin polymerization (turbidity/light-scattering)
  • EGTA-induced polymerization pattern
  • cold-induced depolymerization pattern
  • tubulin secondary structure (circular dichroism)

Limitations

  • In vitro study; findings may not generalize to intact cells or in vivo effects
  • Sample size not reported in abstract
  • Exposure duration and other dosimetry details beyond SAR not reported in abstract
View raw extracted JSON
{
  "study_type": "in_vitro",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": 2450,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "microtubule/tubulin polymerization (turbidity/light-scattering)",
    "EGTA-induced polymerization pattern",
    "cold-induced depolymerization pattern",
    "tubulin secondary structure (circular dichroism)"
  ],
  "main_findings": "In vitro exposure to 2450 MHz continuous-wave microwaves during stages of the microtubule polymerization cycle showed no change in baseline turbidity or light-scattering properties at 20 or 200 mW/g SAR. EGTA-induced polymerization and cold-induced depolymerization patterns were similar between control and exposed samples, and circular dichroism spectra of purified tubulin were not influenced, suggesting no effect on tubulin secondary structure.",
  "effect_direction": "no_effect",
  "limitations": [
    "In vitro study; findings may not generalize to intact cells or in vivo effects",
    "Sample size not reported in abstract",
    "Exposure duration and other dosimetry details beyond SAR not reported in abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "2450 MHz",
    "microwave radiation",
    "continuous wave",
    "SAR",
    "microtubules",
    "tubulin",
    "polymerization",
    "depolymerization",
    "circular dichroism",
    "in vitro"
  ],
  "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: Not supplied
PubMed: 6823518

Read the original paper →

Related papers

← Back to the Research Library