Abstract

Despite advances in wound care, many wounds never heal and become chronic problems that result in significant morbidity and mortality to the patient. Cellular therapy for cutaneous wounds has recently come under investigation as a potential treatment modality for impaired wound healing. Bone marrow-derived mesenchymal stem cells (MSCs) are a promising source of adult progenitor cells for cytotherapy as they are easy to isolate and expand and have been shown to differentiate into various cell lineages. Early studies have demonstrated that MSCs may enhance epithelialization, granulation tissue formation, and neovascularization resulting in accelerated wound closure. It is currently unclear if these effects are mediated through cellular differentiation or by secretion of cytokines and growth factors. This review discusses the proposed biological contributions of MSCs to cutaneous repair and their clinical potential in cell-based therapies.

Highlights

  • Chronic wounds are a cause of significant morbidity and mortality and pose a large financial burden on the healthcare system

  • WORK The possible benefits of mesenchymal stem cells (MSCs)-based therapy in the clinically important area of chronic wounds have been demonstrated in numerous studies

  • The International Society for Cellular Therapy has published minimum criteria to define human MSCs, significant heterogeneity certainly exists within this population (Dominici et al, 2006)

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Summary

INTRODUCTION

Chronic wounds are a cause of significant morbidity and mortality and pose a large financial burden on the healthcare system. Local delivery of MSCs significantly increased granulation tissue formation and decreased wound healing time in leptin receptor-deficient db/db diabetic mice compared to those treated with either PBS or non-cell typespecific bone marrow aspirate (Javazon et al, 2007). Injection of primary bone marrow cells into the wound edge followed by topical application of cultured MSCs resulted in the complete closure of three chronic wounds which had failed traditional therapy including autologous skin grafting (Badiavas and Falanga, 2003). MSCs ENHANCE WOUND HEALING BY DIFFERENTIATION INTO EPIDERMAL CELLS There is data to suggest that MSCs mobilize from the bone marrow niche and traffic to ischemic tissue via the peripheral circulation in response to cytokine signaling (Hamou et al, 2009).

Autologous bone marrow aspirate and cultured MSCs
Dermal fibroblasts
Topical application of MSC seeded collagen sponge
CONCLUSIONS AND FUTURE WORK
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