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Updated: Jan 8, 2026
A Protocol for Constructing a Rat Wound Model of Type 1 Diabetes
Published on: February 17, 2023
A miRNA cocktail orchestrates coordinated cellular responses to promote diabetic wound healing
Yejing Huang1, Liping Zhu1, Jiating Wang1
1Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Jiangsu Provincial Key Laboratory of Dermatology, Hospital for Skin Diseases, Institute of Dermatology Chinese Academy of Medical Sciences & Peking Union Medical College, No. 12 Jiangwangmiao Street, Xuanwu District, Nanjing, 210042, China.
Background:
Chronic wounds, particularly diabetic ulcers, impose significant health and economic burdens globally because of their complex pathology and the limited availability of therapeutic approaches. Multiple microRNAs (miRNAs) play crucial roles in regulating biological processes in wound healing. However, single-miRNA therapies may not fully overcome the multifaceted barriers of impaired wound repair. Efforts to discover more effective wound therapies continue unabated. This study aims to evaluate the therapeutic potential of a multi-miRNA strategy for enhancing diabetic wound repair.
Methods:
In this study, we developed a microRNA cocktail that targets multiple critical phases of wound healing: inflammation, re-epithelialization, granulation tissue formation, and angiogenesis. This therapeutic cocktail includes locked nucleic acid-modified mimics of miR-19b-3p, miR-132-3p, and miR-31-5p, along with an inhibitor of miR-92a-3p, which are delivered via in vivo-jetPEI as the carrier, addressing the multifaceted nature of wound repair mechanisms. The wound healing efficacy of the cocktail was systematically evaluated in mouse models of acute and chronic wounds.
Results:
Local application of the miRNA cocktail to wounds markedly enhanced acute wound healing in wild-type mice, outperforming the effects of the individual miRNAs. Moreover, the miRNA cocktail accelerated diabetic wound healing by orchestrating coordinated cellular responses at the wound site and significantly decreasing inflammatory cytokine expression and CD68+ macrophage migration while promoting re-epithelialization, angiogenesis, and granulation tissue formation. Notably, the cocktail also facilitated nerve regeneration in the wound area at day 30 postinjury.
Conclusions:
Our findings suggest that this miRNA cocktail has a potential therapeutic value for revitalizing the healing process in chronic wounds. Therefore, further investigations in controlled clinical trials are warranted to confirm the efficacy and applicability of this miRNA cocktail in a clinical setting.
Insights
A novel microRNA cocktail effectively promotes diabetic wound healing by targeting multiple repair phases, outperforming single microRNA therapies. This approach shows potential for treating chronic wounds and warrants further clinical investigation.
Area of Science:
- Regenerative Medicine
- Molecular Biology
- Wound Healing Research
Background:
- Chronic wounds, especially diabetic ulcers, present significant global health and economic challenges due to complex pathology and limited treatment options.
- MicroRNAs (miRNAs) are key regulators of wound healing, but single-miRNA therapies have shown limited success in addressing complex wound repair barriers.
- Developing effective therapies for impaired wound repair remains a critical unmet need.
Purpose of the Study:
- To evaluate the therapeutic potential of a multi-miRNA strategy for enhancing diabetic wound repair.
- To develop and assess a microRNA cocktail targeting multiple critical phases of wound healing, including inflammation, re-epithelialization, granulation tissue formation, and angiogenesis.
- To investigate the efficacy of this multi-miRNA approach in preclinical models of acute and chronic wounds.
Main Methods:
- A microRNA cocktail was formulated using locked nucleic acid-modified mimics of miR-19b-3p, miR-132-3p, and miR-31-5p, along with an inhibitor of miR-92a-3p.
- The cocktail was delivered in vivo using jetPEI as a carrier system.
- Wound healing efficacy was systematically evaluated in mouse models of acute and chronic wounds, including diabetic models.
Main Results:
- The microRNA cocktail significantly enhanced acute wound healing in wild-type mice, surpassing the efficacy of individual miRNAs.
- In diabetic mice, the cocktail accelerated wound healing by coordinating cellular responses, reducing inflammatory cytokine expression and CD68+ macrophage migration.
- The treatment promoted re-epithelialization, angiogenesis, granulation tissue formation, and notably, facilitated nerve regeneration in the wound area.
Conclusions:
- The developed microRNA cocktail demonstrates significant therapeutic potential for improving the healing process in chronic wounds.
- This multi-miRNA strategy effectively addresses the multifaceted nature of impaired wound repair.
- Further clinical trials are essential to validate the efficacy and clinical applicability of this promising miRNA cocktail therapy.
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