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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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Related Experiment Video

Updated: Aug 24, 2025

Prospective, Randomized, and Controlled Study of a Human Umbilical Cord Mesenchymal Stem Cell Injection for Treating Diabetic Foot Ulcers
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Prospective, Randomized, and Controlled Study of a Human Umbilical Cord Mesenchymal Stem Cell Injection for Treating Diabetic Foot Ulcers

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Deviations in MicroRNA-21 Expression Patterns Identify a Therapeutic Target for Diabetic Wound Healing.

Shaquia Idlett-Ali1, Kenneth W Liechty1, Junwang Xu1

  • 1Department of Surgery Laboratory for Fetal and Regenerative Biology, University of Colorado, Denver-Anschutz Medical Campus and Children's Hospital of Colorado, Aurora, Colorado 80045, USA.

Journal of Immunobiology
|October 25, 2022
PubMed
Summary
This summary is machine-generated.

MicroRNA-21 (miR-21) drives M1 macrophage polarization in early diabetic wound healing, potentially impairing recovery. Therapeutic timing of miR-21 interventions is crucial for improving diabetic wound healing outcomes.

Keywords:
DiabetesHyperglycemiaInflammationWound healingmiR-21

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Area of Science:

  • Biomedical Science
  • Molecular Biology
  • Wound Healing Research

Background:

  • Chronic inflammation impairs diabetic wound healing.
  • Macrophage polarization is critical for distinct wound healing stages.
  • MicroRNAs regulate biological processes, including wound healing.

Purpose of the Study:

  • To investigate the role of microRNA-21 (miR-21) in diabetic wound healing.
  • To elucidate the specific mechanisms by which miR-21 influences macrophage polarization in diabetic wounds.
  • To determine the impact of miR-21 expression patterns on wound healing progression.

Main Methods:

  • Analysis of miR-21 expression in diabetic murine and human skin models.
  • Assessment of macrophage polarization in response to miR-21.
  • Correlation of miR-21 levels with wound healing stages.

Main Results:

  • miR-21 preferentially induces M1-like (pro-inflammatory) macrophage polarization in early diabetic wound healing.
  • Persistent elevation of miR-21 is associated with sustained inflammation and impaired healing.
  • Distinct miR-21 expression patterns were observed in diabetic wound healing.

Conclusions:

  • miR-21 plays a significant role in shaping the diabetic wound healing cascade.
  • Sustained miR-21 activity may contribute to chronic inflammation and delayed healing.
  • Therapeutic strategies targeting miR-21 require precise timing for efficacy in diabetic wound treatment.