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Related Experiment Video

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Deciphering the Dysregulating IGF-1-SP1-CD248 Pathway in Fibroblast Functionality during Diabetic Wound Healing.

Ya-Chu Ku1, Yao-Chou Lee2, Yi-Kai Hong3

  • 1Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Department of Biochemistry and Molecular Biology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.

The Journal of Investigative Dermatology
|September 18, 2024
PubMed
Summary
This summary is machine-generated.

Diabetic ulcers show reduced CD248 expression in fibroblasts. The IGF-1/SP1 pathway regulates CD248, and targeting this axis may treat diabetic wounds.

Keywords:
CD248Diabetic wound healingFibroblastIGF-1SP1

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Area of Science:

  • Cell Biology
  • Dermatology
  • Molecular Biology

Background:

  • Diabetic ulcer progression is linked to reduced fibroblast activity.
  • CD248, a glycoprotein in activated fibroblasts, is crucial for wound healing.
  • The specific role and regulation of CD248 in diabetic wound healing are unclear.

Purpose of the Study:

  • To investigate the role of CD248 in diabetic wound healing.
  • To identify the regulatory pathway controlling CD248 expression in fibroblasts.

Main Methods:

  • Analysis of CD248 expression in human and mouse diabetic wound samples.
  • Single-cell transcriptome analysis to identify fibroblast subtypes.
  • Investigated the role of Insulin-like Growth Factor 1 (IGF-1) and SP1 transcription factor.
  • Utilized immunohistochemical staining and explored the impact of Tumor Necrosis Factor alpha (TNFα).

Main Results:

  • CD248 expression is significantly decreased in diabetic wounds.
  • A reduction in CD248-enriched secretory-reticular fibroblasts was observed.
  • IGF-1, via the Akt/mTOR pathway and SP1, regulates CD248 expression.
  • Elevated TNFα in diabetes leads to IGF-1 resistance, inhibiting CD248 induction.

Conclusions:

  • The IGF-1-SP1-CD248 signaling axis is critical for activating fibroblasts in wound healing.
  • Reduced CD248 expression in diabetic wounds is linked to fibroblast dysfunction.
  • Targeting the IGF-1-SP1-CD248 axis presents a potential therapeutic strategy for diabetic ulcers.