Exposure to cell phone radiation up-regulates apoptosis genes in primary cultures of neurons and astrocytes

PAPER manual Neurosci Lett 2007 In vitro study Effect: harm Evidence: Low

Read original paper → DOI: 10.1016/j.neulet.2006.09.092 PMID: 17187929 Evidence Lab

Abstract

The health effects of cell phone radiation exposure are a growing public concern. This study investigated whether expression of genes related to cell death pathways are dysregulated in primary cultured neurons and astrocytes by exposure to a working Global System for Mobile Communication (GSM) cell phone rated at a frequency of 1900MHz. Primary cultures were exposed to cell phone emissions for 2h. We used array analysis and real-time RT-PCR to show up-regulation of caspase-2, caspase-6 and Asc (apoptosis associated speck-like protein containing a card) gene expression in neurons and astrocytes. Up-regulation occurred in both "on" and "stand-by" modes in neurons, but only in "on" mode in astrocytes. Additionally, astrocytes showed up-regulation of the Bax gene. The effects are specific since up-regulation was not seen for other genes associated with apoptosis, such as caspase-9 in either neurons or astrocytes, or Bax in neurons. The results show that even relatively short-term exposure to cell phone radiofrequency emissions can up-regulate elements of apoptotic pathways in cells derived from the brain, and that neurons appear to be more sensitive to this effect than astrocytes.

AI evidence extraction

At a glance

Study type

In vitro study

Effect direction

harm

Population

Primary cultured neurons and astrocytes

Sample size

—

Exposure

RF mobile phone · 1900 MHz · 2 h

Evidence strength

Low

Confidence: 95% · Peer-reviewed: yes

Main findings

Primary cultured neurons and astrocytes exposed for 2 hours to emissions from a working GSM cell phone at 1900 MHz showed increased expression of several apoptosis-related genes. Caspase-2, caspase-6, and Asc were up-regulated in neurons and astrocytes, with effects in both on and stand-by modes in neurons but only on mode in astrocytes; Bax was additionally up-regulated in astrocytes.

Outcomes measured

Gene expression related to apoptosis pathways
Up-regulation of caspase-2
Up-regulation of caspase-6
Up-regulation of Asc
Up-regulation of Bax in astrocytes

Limitations

In vitro study
Sample size not stated in the abstract
Short-term exposure only
Outcome limited to gene expression rather than clinical or organism-level effects

View raw extracted JSON

{
    "study_type": "in_vitro",
    "exposure": {
        "band": "RF",
        "source": "mobile phone",
        "frequency_mhz": 1900,
        "sar_wkg": null,
        "duration": "2 h"
    },
    "population": "Primary cultured neurons and astrocytes",
    "sample_size": null,
    "outcomes": [
        "Gene expression related to apoptosis pathways",
        "Up-regulation of caspase-2",
        "Up-regulation of caspase-6",
        "Up-regulation of Asc",
        "Up-regulation of Bax in astrocytes"
    ],
    "main_findings": "Primary cultured neurons and astrocytes exposed for 2 hours to emissions from a working GSM cell phone at 1900 MHz showed increased expression of several apoptosis-related genes. Caspase-2, caspase-6, and Asc were up-regulated in neurons and astrocytes, with effects in both on and stand-by modes in neurons but only on mode in astrocytes; Bax was additionally up-regulated in astrocytes.",
    "effect_direction": "harm",
    "limitations": [
        "In vitro study",
        "Sample size not stated in the abstract",
        "Short-term exposure only",
        "Outcome limited to gene expression rather than clinical or organism-level effects"
    ],
    "evidence_strength": "low",
    "confidence": 0.9499999999999999555910790149937383830547332763671875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "cell phone radiation",
        "GSM",
        "1900 MHz",
        "radiofrequency",
        "neurons",
        "astrocytes",
        "apoptosis",
        "gene expression",
        "caspase-2",
        "caspase-6",
        "Asc",
        "Bax",
        "in vitro"
    ],
    "suggested_hubs": []
}

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

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