Effect of ELF-EMF on cognitive functions, analgesia, and oxidative stress in rats with PTZ-induced epilepsy.

Abstract

This study aimed to examine the impacts of extremely low-frequency (ELF)-electromagnetic field (EMF) on cognitive functions and analgesia in terms of total oxidant status (TOS) and total antioxidant status (TAS) in the experimental pentylenetetrazole (PTZ)-induced epilepsy model. Twenty-four Wistar albino male rats were categorized into four groups: sham, EMF, PTZ, and EMF+PTZ. The rats were repeatedly exposed to alternating 50-Hz and 5-mT EMF for 165 min a day for 7 days. Epileptic seizures were induced with PTZ. The levels of oxidative stress markers were measured. Univariate multifactorial one-way analysis of variance and post hoc Tukey's test were used for pairwise comparisons between groups. A statistically significant difference was observed in the learning and short-term memory levels in the EMF + PTZ group compared with the PTZ group ( < 0.001). Analgesia latency statistically significantly increased in the ELF-EMF and ELF-EMF+PTZ groups compared with both the control and epilepsy groups ( < 0.001). A statistically significant increase in TOS was found in the prefrontal cortex in the PTZ group compared with the sham group ( < 0.001). Also, TOS statistically significantly increased in the hippocampus in both PTZ and ELF-EMF+ PTZ groups compared with the sham group ( < 0.001). ELF-EMF decreased the increased TOS in the hippocampus of rats in the PTZ group.

AI evidence extraction

Main findings

In PTZ-induced epileptic rats, the EMF+PTZ group differed significantly from the PTZ group in learning and short-term memory (p<0.001). Analgesia latency increased in the ELF-EMF and ELF-EMF+PTZ groups compared with both control and epilepsy groups (p<0.001). TOS increased in prefrontal cortex in the PTZ group vs sham (p<0.001) and in hippocampus in PTZ and EMF+PTZ vs sham (p<0.001); ELF-EMF decreased the increased hippocampal TOS in PTZ rats.

Outcomes measured

• Cognitive functions (learning and short-term memory)
• Analgesia latency
• Oxidative stress markers: total oxidant status (TOS) and total antioxidant status (TAS) in brain regions (prefrontal cortex, hippocampus)

Limitations

• Animal model; findings may not generalize to humans
• Small sample size (n=24)
• Exposure conditions limited to 50 Hz, 5 mT, 165 min/day for 7 days
• Abstract does not report TAS results or full quantitative effect sizes for all outcomes

Suggested hubs

• occupational-exposure (0.25)
  Study uses 50 Hz ELF magnetic field exposure (relevant to power-frequency exposure contexts), though not explicitly occupational.

{
    "study_type": "animal",
    "exposure": {
        "band": "ELF",
        "source": null,
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": "165 min/day for 7 days; alternating 50 Hz, 5 mT"
    },
    "population": "Wistar albino male rats with PTZ-induced epilepsy model",
    "sample_size": 24,
    "outcomes": [
        "Cognitive functions (learning and short-term memory)",
        "Analgesia latency",
        "Oxidative stress markers: total oxidant status (TOS) and total antioxidant status (TAS) in brain regions (prefrontal cortex, hippocampus)"
    ],
    "main_findings": "In PTZ-induced epileptic rats, the EMF+PTZ group differed significantly from the PTZ group in learning and short-term memory (p<0.001). Analgesia latency increased in the ELF-EMF and ELF-EMF+PTZ groups compared with both control and epilepsy groups (p<0.001). TOS increased in prefrontal cortex in the PTZ group vs sham (p<0.001) and in hippocampus in PTZ and EMF+PTZ vs sham (p<0.001); ELF-EMF decreased the increased hippocampal TOS in PTZ rats.",
    "effect_direction": "mixed",
    "limitations": [
        "Animal model; findings may not generalize to humans",
        "Small sample size (n=24)",
        "Exposure conditions limited to 50 Hz, 5 mT, 165 min/day for 7 days",
        "Abstract does not report TAS results or full quantitative effect sizes for all outcomes"
    ],
    "evidence_strength": "low",
    "confidence": 0.7800000000000000266453525910037569701671600341796875,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "ELF-EMF",
        "50 Hz",
        "5 mT",
        "pentylenetetrazole",
        "PTZ-induced epilepsy",
        "rats",
        "cognition",
        "learning",
        "short-term memory",
        "analgesia",
        "oxidative stress",
        "TOS",
        "TAS",
        "hippocampus",
        "prefrontal cortex"
    ],
    "suggested_hubs": [
        {
            "slug": "occupational-exposure",
            "weight": 0.25,
            "reason": "Study uses 50 Hz ELF magnetic field exposure (relevant to power-frequency exposure contexts), though not explicitly occupational."
        }
    ]
}

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