The Frequency of a Magnetic Field Determines the Behavior of Tumor and Non-Tumor Nerve Cell Models

Abstract

Category: Cellular Neuroscience Institution: Not specified in the provided text Tags: magnetic fields, frequency, tumor cell models, non-tumor nerve cells, glioblastoma, neuroblastoma, cell proliferation DOI: 10.3390/ijms26052032 URL: mdpi.com Overview Researchers have explored the influence of magnetic fields on basic cellular processes for years. Historically, studies have focused on the intensity of these fields, often overlooking the significant role that frequency may play. This study's main goal was to determine specific frequencies capable of reducing the viability and proliferation of glioblastoma (CT2A) and neuroblastoma (N2A) cell models, with comparisons to a non-tumor astrocyte cell model (C8D1A). Methodology - CT2A, C8D1A, and N2A cell lines exposed to a 100 μT magnetic field. - Variable frequency range between 20 and 100 Hz. - Exposure times of 24, 48, and 72 hours. Findings - Tumor cell viability and proliferation (N2A and CT2A) decreased significantly within a frequency "window" centered at 50 Hz. - Non-tumor astrocyte cells showed different patterns—viability increased at 20 and 40 Hz. - The results support a "biological window" model of frequency-specific cellular response. Conclusion ⚠️ Exposure to certain magnetic field frequencies can reduce the proliferation and viability of tumor cell models derived from nervous tissue. These frequencies induce a cell-type specific response within a defined range (centered at 50 Hz), demonstrating that frequency plays a fundamental role in cellular behavior. The non-tumor astrocyte cell model exhibited increased viability at lower frequencies, indicating the potential for using "bioactive" frequencies therapeutically. This could have implications for both tumor suppression and the treatment of neurodegenerative diseases via modulation of the astrocytic network. Health Link Advisory: This study underscores a connection between electromagnetic field parameters (especially frequency) and health, as specific exposure levels can notably affect the behavior of nerve and tumor cells.

AI evidence extraction

Main findings

CT2A and N2A tumor cell models showed significantly decreased viability and proliferation within a frequency window centered at 50 Hz when exposed to a 100 μT magnetic field (20–100 Hz) for 24–72 h. The non-tumor astrocyte model (C8D1A) showed increased viability at 20 and 40 Hz, indicating a cell-type-specific, frequency-dependent response.

Outcomes measured

• cell viability
• cell proliferation

Limitations

• Sample size not reported in provided text
• In vitro cell-line study; findings may not generalize to in vivo or human health outcomes
• Exposure details beyond field strength, frequency range, and duration (e.g., waveform, exposure setup) not provided in the provided text

Suggested hubs

• occupational-exposure (0.2)
  Study uses ELF magnetic-field frequencies (20–100 Hz) relevant to power-frequency exposures, though no occupational context is stated.

{
    "study_type": "in_vitro",
    "exposure": {
        "band": "ELF",
        "source": "other",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "24, 48, and 72 hours"
    },
    "population": "Cell models: glioblastoma (CT2A), neuroblastoma (N2A), and non-tumor astrocyte (C8D1A) cell lines",
    "sample_size": null,
    "outcomes": [
        "cell viability",
        "cell proliferation"
    ],
    "main_findings": "CT2A and N2A tumor cell models showed significantly decreased viability and proliferation within a frequency window centered at 50 Hz when exposed to a 100 μT magnetic field (20–100 Hz) for 24–72 h. The non-tumor astrocyte model (C8D1A) showed increased viability at 20 and 40 Hz, indicating a cell-type-specific, frequency-dependent response.",
    "effect_direction": "mixed",
    "limitations": [
        "Sample size not reported in provided text",
        "In vitro cell-line study; findings may not generalize to in vivo or human health outcomes",
        "Exposure details beyond field strength, frequency range, and duration (e.g., waveform, exposure setup) not provided in the provided text"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "magnetic fields",
        "ELF",
        "frequency window",
        "100 μT",
        "20–100 Hz",
        "50 Hz",
        "glioblastoma",
        "CT2A",
        "neuroblastoma",
        "N2A",
        "astrocyte",
        "C8D1A",
        "cell viability",
        "cell proliferation"
    ],
    "suggested_hubs": [
        {
            "slug": "occupational-exposure",
            "weight": 0.200000000000000011102230246251565404236316680908203125,
            "reason": "Study uses ELF magnetic-field frequencies (20–100 Hz) relevant to power-frequency exposures, though no occupational context is stated."
        }
    ]
}

Comments

Log in to comment.

No comments yet.