Microtubular structure impairment after GSM-modulated RF radiation exposure.

Abstract

The objective of the study was to investigate whether low-level 915 MHz GSM-modulated radiofrequency (RF) radiation impairs microtubular structure and affects normal cell growth. V79 cells were exposed to a GSM-modulated field in a Gigahertz Transversal Electromagnetic Mode cell (GTEM cell) for 1, 2, and 3 h. Signal generator combined with power and chip modulator generated the electromagnetic field (EMF). The electric field strength was adjusted to 10, 20, and 30 V/m, and the average specific absorption rate (SAR) was calculated to be 0.23, 0.8, and 1.6 W/kg. The structure of microtubule proteins was assessed by indirect immunocytochemistry, and cell growth was determined based on cell counts taken every day over six post-exposure days. Three-hour radiation exposure significantly altered microtubule structure regardless of the electric field strength. Moreover, on the third post-exposure day, three-hour radiation significantly reduced cell growth, regardless of field strength. The same was observed with two-hour exposure at 20 and 30 V/m. In conclusion, 915 MHz GSM-modulated RF radiation affects microtubular proteins in a time-dependent manner, which, in turn, affects cell proliferation. Our future research will focus on microtubule structure throughout the cell cycle and RF radiation effects on mitotic spindle.

AI evidence extraction

Main findings

V79 cells exposed to 915 MHz GSM-modulated RF in a GTEM cell showed significantly altered microtubule structure after 3-hour exposure at all tested electric field strengths (10, 20, 30 V/m). Cell growth was significantly reduced on the third post-exposure day after 3-hour exposure at all field strengths, and also after 2-hour exposure at 20 and 30 V/m.

Outcomes measured

• Microtubule structure (indirect immunocytochemistry)
• Cell growth/proliferation (cell counts over six post-exposure days)

Limitations

• Sample size not reported in abstract
• In vitro cell model (V79 cells), limiting direct inference to human health outcomes
• Exposure details reported primarily as electric field strength and calculated average SAR; other dosimetry/temperature control details not provided in abstract

{
    "study_type": "in_vitro",
    "exposure": {
        "band": "RF",
        "source": null,
        "frequency_mhz": 915,
        "sar_wkg": null,
        "duration": "1, 2, and 3 h"
    },
    "population": "V79 cells",
    "sample_size": null,
    "outcomes": [
        "Microtubule structure (indirect immunocytochemistry)",
        "Cell growth/proliferation (cell counts over six post-exposure days)"
    ],
    "main_findings": "V79 cells exposed to 915 MHz GSM-modulated RF in a GTEM cell showed significantly altered microtubule structure after 3-hour exposure at all tested electric field strengths (10, 20, 30 V/m). Cell growth was significantly reduced on the third post-exposure day after 3-hour exposure at all field strengths, and also after 2-hour exposure at 20 and 30 V/m.",
    "effect_direction": "harm",
    "limitations": [
        "Sample size not reported in abstract",
        "In vitro cell model (V79 cells), limiting direct inference to human health outcomes",
        "Exposure details reported primarily as electric field strength and calculated average SAR; other dosimetry/temperature control details not provided in abstract"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "915 MHz",
        "GSM-modulated",
        "radiofrequency",
        "RF radiation",
        "GTEM cell",
        "V79 cells",
        "microtubules",
        "immunocytochemistry",
        "cell proliferation",
        "SAR"
    ],
    "suggested_hubs": []
}

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