EMF acts on rat bone marrow mesenchymal stem cells to promote differentiation to osteoblasts and to inhibit differentiation to adipocytes.

Bioelectromagnetics · 2010 · Benefit · Low evidence

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BenefitLow evidencePaper 4403

Sinusoidal EMF at 15 Hz and 1 mT promoted osteogenic differentiation and inhibited adipogenic differentiation of rat bone marrow mesenchymal stem cells. EMF increased markers of osteoblast differentiation and decreased markers of adipocyte differentiation.

Study snapshot

PublicationBioelectromagnetics · 2010

Study typein_vitro

Reported directionBenefit

Evidence ratingLow

Abstract

The use of electromagnetic fields (EMFs) to treat nonunion fractures developed from observations in the mid-1900s. Whether EMF directly regulates the bone marrow mesenchymal stem cells (MSCs), differentiating into osteoblasts or adipocytes, remains unknown. In the present study, we investigated the roles of sinusoidal EMF of 15 Hz, 1 mT in differentiation along these separate lineages using rat bone marrow MSCs. Our results showed that EMF promoted osteogenic differentiation of the stem cells and concurrently inhibited adipocyte formation. EMF increased alkaline phosphatase (ALP) activity and mineralized nodule formation, and stimulated osteoblast-specific mRNA expression of RUNX2, ALP, BMP2, DLX5, and BSP. In contrast, EMF decreased adipogenesis and inhibited adipocyte-specific mRNA expression of adipsin, AP-2, and PPARgamma2, and also inhibited protein expression of PPARgamma2. These observations suggest that commitment of MSCs into osteogenic or adipogenic lineages is influenced by EMF.

Machine Enhanced Logic

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 typein_vitro

Effect directionbenefit

Populationrat bone marrow mesenchymal stem cells

Sample sizeNot supplied

Exposure0.015 MHz

Evidence strengthLowConfidence: 60% · Peer reviewed: yes

Main findings

Outcomes measured

osteogenic differentiation
adipogenic differentiation
alkaline phosphatase activity
mineralized nodule formation
osteoblast-specific mRNA expression
adipocyte-specific mRNA expression
PPARgamma2 protein expression

Limitations

in vitro study, results may not directly translate to in vivo or human effects
no information on long-term effects or functional outcomes

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": null,
    "source": null,
    "frequency_mhz": 0.015,
    "sar_wkg": null,
    "duration": null
  },
  "population": "rat bone marrow mesenchymal stem cells",
  "sample_size": null,
  "outcomes": [
    "osteogenic differentiation",
    "adipogenic differentiation",
    "alkaline phosphatase activity",
    "mineralized nodule formation",
    "osteoblast-specific mRNA expression",
    "adipocyte-specific mRNA expression",
    "PPARgamma2 protein expression"
  ],
  "main_findings": "Sinusoidal EMF at 15 Hz and 1 mT promoted osteogenic differentiation and inhibited adipogenic differentiation of rat bone marrow mesenchymal stem cells. EMF increased markers of osteoblast differentiation and decreased markers of adipocyte differentiation.",
  "effect_direction": "benefit",
  "limitations": [
    "in vitro study, results may not directly translate to in vivo or human effects",
    "no information on long-term effects or functional outcomes"
  ],
  "evidence_strength": "low",
  "confidence": 0.6,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic fields",
    "mesenchymal stem cells",
    "osteoblast differentiation",
    "adipocyte differentiation",
    "bone marrow",
    "in vitro"
  ],
  "suggested_hubs": []
}

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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: 10.1002/bem.20560
PubMed: 20041434

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