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Protocol to Create Chronic Wounds in Diabetic Mice
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Silk-CNT Mediated Fibroblast Stimulation toward Chronic Wound Repair.

Naiwei Chi1, Shuyao Zheng1, Elwin Clutter1

  • 1Department of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616, USA.

Recent Progress in Materials
|June 19, 2020
PubMed
Summary

Diabetic fibroblast dysfunction slows wound healing by altering collagen production. Electrically conductive silk-CNT fibers restored normal collagen balance, promoting tissue repair and offering a new cell therapy approach.

Keywords:
Fibroblastcarbon nanotubechronic woundcollagen Icollagen IIIelectrical stimulationsilk

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Cell Biology

Background:

  • Diabetic patients exhibit chronic wounds due to fibroblast dysfunction.
  • Diabetic fibroblasts overproduce collagen I (COLI) relative to collagen III (COLIII), impairing wound healing.
  • This imbalance leads to delayed tissue granulation and prolonged healing times.

Purpose of the Study:

  • To restore matrix protein productivity in diabetic fibroblasts.
  • To utilize aligned, electrically conductive spider silk-CNT fibers for fibroblast stimulation.
  • To investigate the potential for electrical stimulation to induce cell polarization and activation.

Main Methods:

  • Culturing diabetic fibroblasts on aligned spider silk-CNT fibers.
  • Applying electrical stimulation to fibroblasts via the conductive matrix.
  • Analyzing collagen I and III production, matrix metalloproteinases expression, and overall cell function.

Main Results:

  • Induced a 5.2-fold increase in COLI and a 42.7-fold increase in COLIII production in diabetic fibroblasts.
  • Normalized the COLI/COLIII ratio, suppressed matrix metalloproteinases, and promoted a wound-healing profile.
  • Demonstrated similar positive effects using silkworm silk-CNT fibers and in normal fibroblasts, indicating broad applicability.

Conclusions:

  • Engineered biopolymer matrices can correct fibroblast dysfunction.
  • This approach offers potential for personalized cell therapy in noninvasive treatments.
  • The findings inspire the design of multi-functional biometrics for effective tissue regeneration.