Electromagnetic fields counteract IL-1β activity during chondrogenesis of bovine mesenchymal stem cells.

Journal of tissue engineering and regenerative medicine · 2015 · Benefit · Low evidence

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BenefitLow evidencePaper 4484

Study snapshot

PublicationJournal of tissue engineering and regenerative medicine · 2015

Study typein_vitro

Reported directionBenefit

Evidence ratingLow

Abstract

Osteoarthritis (OA) is a common joint disease associated with articular cartilage degeneration. To improve the therapeutic options of OA, tissue engineering based on the use of mesenchymal stem cells (MSCs) has emerged. However, the presence of inflammatory cytokines, such as interleukin-1β (IL-1β), during chondrogenesis reduces the efficacy of cartilage engineering repair procedures by preventing chondrogenic differentiation. Previous studies have shown that electromagnetic fields (EMFs) stimulate anabolic processes in OA cartilage and limit IL-1β catabolic effects. We investigated the role of EMFs during chondrogenic differentiation of MSCs, isolated from bovine synovial fluid, in the absence and presence of IL-1β. Pellets of MSCs were differentiated for 3 and 5 weeks with transforming growth factor-β3 (TGFβ3), in the absence and presence of IL-1β and exposed or unexposed to EMFs. Biochemical, quantitative real-time RT-PCR and histological results showed that EMFs alone or in the presence of TGFβ3 play a limited role in promoting chondrogenic differentiation. Notably, in the presence of IL-1β and TGFβ3 a recovery of proteoglycan (PG) synthesis, PG content and aggrecan and type II collagen mRNA expression in the EMF-exposed compared to unexposed pellets was observed. Also, histological and immunohistochemical results showed an increase in staining for alcian blue, type II collagen and aggrecan in EMF-exposed pellets. In conclusion, this study shows a significant role of EMFs in counteracting the IL-1β-induced inhibition of chondrogenesis, suggesting EMFs as a therapeutic strategy for improving the clinical outcome of cartilage engineering repair procedures, based on the use of MSCs.

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

PopulationBovine mesenchymal stem cells (MSCs) isolated from synovial fluid; pellet culture during chondrogenic differentiation

Sample sizeNot supplied

Exposure3 and 5 weeks

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

EMF exposure alone or with TGFβ3 had a limited role in promoting chondrogenic differentiation. In the presence of IL-1β and TGFβ3, EMF-exposed pellets showed recovery of proteoglycan synthesis/content and increased aggrecan and type II collagen mRNA expression compared with unexposed pellets, with increased histological/immunohistochemical staining for alcian blue, type II collagen, and aggrecan.

Outcomes measured

Chondrogenic differentiation during pellet culture
Proteoglycan (PG) synthesis
PG content
Aggrecan mRNA expression
Type II collagen mRNA expression
Histological staining (alcian blue)
Immunohistochemical staining (type II collagen, aggrecan)

Limitations

EMF exposure parameters (e.g., frequency, intensity) not reported in the abstract
In vitro bovine cell/pellet model; clinical relevance not established in the abstract
Sample size and replication details not provided in the abstract

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": null,
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": "3 and 5 weeks"
  },
  "population": "Bovine mesenchymal stem cells (MSCs) isolated from synovial fluid; pellet culture during chondrogenic differentiation",
  "sample_size": null,
  "outcomes": [
    "Chondrogenic differentiation during pellet culture",
    "Proteoglycan (PG) synthesis",
    "PG content",
    "Aggrecan mRNA expression",
    "Type II collagen mRNA expression",
    "Histological staining (alcian blue)",
    "Immunohistochemical staining (type II collagen, aggrecan)"
  ],
  "main_findings": "EMF exposure alone or with TGFβ3 had a limited role in promoting chondrogenic differentiation. In the presence of IL-1β and TGFβ3, EMF-exposed pellets showed recovery of proteoglycan synthesis/content and increased aggrecan and type II collagen mRNA expression compared with unexposed pellets, with increased histological/immunohistochemical staining for alcian blue, type II collagen, and aggrecan.",
  "effect_direction": "benefit",
  "limitations": [
    "EMF exposure parameters (e.g., frequency, intensity) not reported in the abstract",
    "In vitro bovine cell/pellet model; clinical relevance not established in the abstract",
    "Sample size and replication details not provided in the abstract"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "electromagnetic fields",
    "EMF",
    "osteoarthritis",
    "chondrogenesis",
    "mesenchymal stem cells",
    "bovine",
    "synovial fluid",
    "IL-1β",
    "TGFβ3",
    "proteoglycans",
    "aggrecan",
    "type II collagen",
    "cartilage tissue engineering"
  ],
  "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/term.1671
PubMed: 23255506

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