Effects of pulsed EMF on learning and memory abilities of STZ-induced dementia rats

2019 · Benefit · Low evidence

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BenefitLow evidencePaper 1873

In STZ-induced dementia rats, pulsed EMF exposure (10 mT at 20 Hz) was associated with improved Morris water maze performance versus STZ alone, including a 66% reduction in mean escape latency and decreases in swimming distance (55%) and time to first crossin…

Study snapshot

Publicationmanual · 2019

Study typeanimal

Reported directionBenefit

Evidence ratingLow

Abstract

Effects of pulsed EMF on learning and memory abilities of STZ-induced dementia rats Li Y, Zhang Y, Wang W, Zhang Y, Yu Y, Cheing GL, Pan W. Effects of pulsed electromagnetic fields on learning and memory abilities of STZ-induced dementia rats. Electromagn Biol Med. 2019 Mar 17:1-8. doi: 10.1080/15368378.2019.1591437. Abstract INTRODUCTION: Recent studies have shown that pulsed electromagnetic field (EMF) has therapeutic potential for dementia, but the associated neurobiological effects are unclear. This study aimed to determine the effects of pulsed EMF on Streptozotocin (STZ)-induced dementia rats. METHODS: Forty Sprague-Dawley rats were randomly allocated to one of the four groups: (i) control, (ii) normal saline injection (sham group), (iii) STZ injection (STZ group) and (iv) STZ injection with pulsed EMF exposure (PEMF, 10 mT at 20 Hz) (STZ + MF group). Morris water maze was used to assess the learning and memory abilities. Insulin growth factors 1 and 2 (IGF-1 and IGF-2) gene expression were determined by quantitative PCR. RESULTS: The results showed that the mean escape latency in STZ-induced dementia rats was reduced by 66% under the exposure of pulsed EMF. Compared with the STZ group, the swimming distance and the time for first crossing the platform decreased by 55 and 41.6% in STZ + MF group, respectively. Furthermore, the IGF-2 gene expression significantly increased compared to that of the STZ group. CONCLUSIONS: Our findings indicate that the pulsed EMF exposure can improve the ability of learning and memory in STZ-induced dementia rats and this effect may be related to the process of IGF signal transduction, suggesting a potential role for the pulsed EMF for the amelioration of cognition impairment. ncbi.nlm.nih.gov

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeanimal

Effect directionbenefit

PopulationSTZ-induced dementia Sprague-Dawley rats

Sample size40

ExposureNot supplied

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

Outcomes measured

Learning and memory performance (Morris water maze: escape latency, swimming distance, time to first crossing platform)
IGF-1 gene expression
IGF-2 gene expression

Limitations

Exposure duration not reported in the abstract.
No SAR or dosimetry details beyond field strength (10 mT) and frequency (20 Hz) provided in the abstract.
Animal model (STZ-induced dementia rats) may limit direct generalizability to humans.

View raw extracted JSON

{
  "study_type": "animal",
  "exposure": {
    "band": null,
    "source": "pulsed electromagnetic field (PEMF) exposure",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": "STZ-induced dementia Sprague-Dawley rats",
  "sample_size": 40,
  "outcomes": [
    "Learning and memory performance (Morris water maze: escape latency, swimming distance, time to first crossing platform)",
    "IGF-1 gene expression",
    "IGF-2 gene expression"
  ],
  "main_findings": "In STZ-induced dementia rats, pulsed EMF exposure (10 mT at 20 Hz) was associated with improved Morris water maze performance versus STZ alone, including a 66% reduction in mean escape latency and decreases in swimming distance (55%) and time to first crossing the platform (41.6%). IGF-2 gene expression significantly increased compared with the STZ group.",
  "effect_direction": "benefit",
  "limitations": [
    "Exposure duration not reported in the abstract.",
    "No SAR or dosimetry details beyond field strength (10 mT) and frequency (20 Hz) provided in the abstract.",
    "Animal model (STZ-induced dementia rats) may limit direct generalizability to humans."
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "pulsed electromagnetic field",
    "PEMF",
    "20 Hz",
    "10 mT",
    "streptozotocin",
    "STZ-induced dementia",
    "rats",
    "Morris water maze",
    "learning",
    "memory",
    "IGF-2",
    "IGF signal transduction"
  ],
  "suggested_hubs": [
    {
      "slug": "animal-studies",
      "weight": 0.9,
      "reason": "Experimental study in rats assessing cognitive outcomes under pulsed EMF exposure."
    }
  ]
}

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

Identifiers and source

DOI: 10.1080/15368378.2019.1591437
PubMed: Not supplied

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