Accelerated wound healing by smad3 antisense oligonucleotides-impregnated chitosan/alginate polyelectrolyte complex

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing Research

Background:

• Smad3 is crucial for TGF-beta1 signaling in wound healing.
• Accelerating cutaneous wound repair remains a significant clinical challenge.

Purpose of the Study:

• To develop and evaluate a Smad3 antisense oligonucleotide-polyelectrolyte complex (ASOs-PEC) for enhanced wound healing.
• To investigate the efficacy of chitosan-sodium alginate PEC loaded with Smad3 ASOs.

Main Methods:

• Polyelectrolyte complexes (PECs) of chitosan and sodium alginate were prepared and characterized.
• Smad3 ASOs were impregnated into the PECs.
• Full-thickness excisional wounds in mice were treated with Smad3 ASOs-PEC, PEC alone, Smad3 ASOs, or gauze.

Main Results:

• ASOs-PEC exhibited increased zeta potential and bioadhesive strength with higher chitosan content.
• Smad3 ASOs-PEC significantly accelerated wound closure and tissue regeneration compared to controls.
• Histological analysis showed increased collagen content and decreased TGF-beta1 levels in the Smad3 ASOs-PEC group.

Conclusions:

• Chitosan-sodium alginate PECs loaded with Smad3 ASOs demonstrate potential for accelerated wound healing.
• The Smad3 ASOs-PEC formulation effectively modulates key molecular pathways involved in tissue repair.