Preconditioning strategies for promoting mesenchymal stem cell homing / 中国组织工程研究

ABSTRACT

BACKGROUND:Homing is the initial and key procedure of stem cel s-based tissue restoration. Current studies have shown that the inability to recruit bone marrow mesenchymal stem cel s to target tissue with high efficiency remains a significant barrier to tissue restoration. Preconditioning strategy provides a new insight to promote stem cel homing. OBJECTIVE:To review preconditioning strategies for promoting the homing of stem cel s. METHODS:In PubMed database, different combinations of terms from“stem cel , mesenchymal stem cel s, preconditioning, homing, migration”served as search terms to retrieve articles referring preconditioning strategies for promoting mesenchymal stem cel homing published from January 2000 to September 2015. According to the inclusion criteria, 72 articles were selected for final review. RESULTS AND CONCLUSION:Pretreating target tissue or mesenchymal stem cel s ahead of cel transplantation, known as tissue preconditioning or cel preconditioning, prominently promotes the homing of mesenchymal stem cel s, therefore enhancing tissue restoration effect. Tissue preconditioning is designed to up-regulate expression of chemokines by varying the local microenvironment, thereby increasing homing ability of mesechymal stem cel s. Mesenchymal stem cel preconditioning strategies, for example, gene modification and cytokine induction, are mainly to up-regulate expression of chemokine receptors on the surface of mesenchymal stem cel s as effectors, and thus promote targeted cel homing. Overal , preconditioning strategy wil bring great hope to apply stem cel therapy into the clinic.