Microwave effects on acetylcholine-induced channels in cultured chick myotubes

Abstract

The behavior of cultured myotubes from chick embryos exposed to microwaves has been experimentally analyzed. Recordings of acetylcholine-induced currents have been obtained via patch-clamp techniques using both cell-attached (single-channel current recording) and whole-cell (total current recording) configurations. During the exposure to low-power microwaves the frequency of the ACh-activated single channel openings decreased, while the ACh-induced total current showed a faster falling phase. Channel open time and conductance were not affected by microwave irradiation. It is concluded that the exposure to microwaves increases the rate of desensitization and decreases the channel opening probability. The nonthermal origin and the molecular interaction mechanisms governing these electromagnetic-induced effects are discussed.

AI evidence extraction

Main findings

During exposure to low-power microwaves, the frequency of ACh-activated single-channel openings decreased and the ACh-induced total current showed a faster falling phase. Channel open time and conductance were reported as not affected; the authors conclude microwaves increased desensitization rate and decreased channel opening probability.

Outcomes measured

• Acetylcholine (ACh)-activated single-channel opening frequency
• ACh-induced total current falling phase (desensitization rate)
• Channel open time
• Channel conductance
• Channel opening probability

Limitations

• Exposure parameters (e.g., frequency, SAR, duration) not provided in the abstract
• In vitro model (cultured chick embryo myotubes), limiting direct generalization to humans or in vivo conditions
• Sample size and statistical details not reported in the abstract

{
    "study_type": "in_vitro",
    "exposure": {
        "band": "microwave",
        "source": null,
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": "Cultured myotubes from chick embryos (chick myotubes)",
    "sample_size": null,
    "outcomes": [
        "Acetylcholine (ACh)-activated single-channel opening frequency",
        "ACh-induced total current falling phase (desensitization rate)",
        "Channel open time",
        "Channel conductance",
        "Channel opening probability"
    ],
    "main_findings": "During exposure to low-power microwaves, the frequency of ACh-activated single-channel openings decreased and the ACh-induced total current showed a faster falling phase. Channel open time and conductance were reported as not affected; the authors conclude microwaves increased desensitization rate and decreased channel opening probability.",
    "effect_direction": "harm",
    "limitations": [
        "Exposure parameters (e.g., frequency, SAR, duration) not provided in the abstract",
        "In vitro model (cultured chick embryo myotubes), limiting direct generalization to humans or in vivo conditions",
        "Sample size and statistical details not reported in the abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "microwaves",
        "low-power",
        "acetylcholine-induced currents",
        "ACh receptor channels",
        "patch-clamp",
        "cell-attached",
        "whole-cell",
        "single-channel openings",
        "desensitization",
        "chick myotubes",
        "in vitro"
    ],
    "suggested_hubs": []
}

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