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Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
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Reprogramming Wound Healing: GAG-Based Bioactive Scaffold Drives Pro-Regenerative Cellular Cross-Talk.

Shrikant Sitaram Kirwale1, Ritika Jaiswal1, Aniruddha Roy1

  • 1Department of Pharmacy, Birla Institute of Technology & Science, Pilani, Rajasthan, India.

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
|March 16, 2026
PubMed
Summary
This summary is machine-generated.

A novel glycosaminoglycan scaffold (CH-(CS-HA)) effectively promotes wound healing by modulating fibroblast-macrophage cross-talk, enhancing regenerative repair and tissue remodeling.

Keywords:
cell‐graftingchitosanchondroitin sulfatecross‐talkhyaluronic acidtissue regeneration

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Wound Healing Research

Background:

  • Effective wound healing relies on intricate fibroblast-macrophage communication to transition from inflammation to regeneration.
  • Dysregulated cross-talk can impede healing, leading to chronic wounds or excessive scarring.
  • Developing biomaterials that modulate this cellular communication is crucial for promoting regenerative repair.

Purpose of the Study:

  • To evaluate a glycosaminoglycan (GAG)-based scaffold (CH-(CS-HA)) for its ability to modulate fibroblast-macrophage cross-talk.
  • To assess the scaffold's impact on extracellular matrix (ECM) remodeling and immune cell polarization.
  • To determine the efficacy of the CH-(CS-HA) scaffold in promoting functional wound closure and tissue regeneration in vivo.

Main Methods:

  • In vitro coculture of fibroblasts and macrophages with CH-(CS-HA) conditioned media.
  • Analysis of gene expression for markers of fibroblast activation (α-SMA, fibronectin), ECM composition (Col-I/Col-III), and macrophage polarization (CD86, CD206).
  • In vivo assessment using a full-thickness rat wound model, evaluating wound closure rates, gene expression in healed tissue, and histological analysis.

Main Results:

  • In vitro studies showed CH-(CS-HA) promoted fibroblast activation and antifibrotic ECM remodeling (decreased Col-I/Col-III and TGF-β1/TGF-β3 ratios).
  • Macrophages exhibited M2 polarization (increased CD206, decreased CD86) and an anti-inflammatory phenotype (reduced TGF-β1/TGF-β3 ratio).
  • In vivo, CH-(CS-HA) treatment resulted in ~91% wound closure by day 17, with enhanced regenerative markers and complete re-epithelialization.

Conclusions:

  • The CH-(CS-HA) scaffold effectively orchestrates immune-stromal cross-talk, resolving inflammation and promoting balanced ECM remodeling.
  • This GAG-based biomaterial facilitates functional tissue regeneration, including re-epithelialization and hair follicle development.
  • CH-(CS-HA) represents a promising therapeutic strategy for enhancing wound healing and regenerative repair.