The hair follicle(HF)is a highly conserved sensory organ associated with the immune response against pathogens,thermoregulation,sebum production,angiogenesis,neurogenesis and wound healing.Although recent advances in ...The hair follicle(HF)is a highly conserved sensory organ associated with the immune response against pathogens,thermoregulation,sebum production,angiogenesis,neurogenesis and wound healing.Although recent advances in lineage-tracing techniques and the ability to profile gene expression in small populations of cells have increased the understanding of how stem cells operate during hair growth and regeneration,the construction of functional follicles with cycling activity is still a great challenge for the hair research field and for translational and clinical applications.Given that hair formation and cycling rely on tightly coordinated epithelial-mesenchymal interactions,we thus review potential cell sources with HF-inducive capacities and summarize current bioengineering strategies for HF regeneration with functional restoration.展开更多
Small molecules loaded into biological materials present a promising strategy for stimulating endogenous repair mechanisms for in situ skin regeneration.Lithium can modulate various biologic processes,promoting prolif...Small molecules loaded into biological materials present a promising strategy for stimulating endogenous repair mechanisms for in situ skin regeneration.Lithium can modulate various biologic processes,promoting proliferation,angiogenesis,and decreasing inflammation.However,its role in skin repair is rarely reported.In this study,we loaded lithium chloride(LiCl)into the chitosan(CHI)hydrogel and develop a sterile and biocompatible sponge scaffold through freeze-drying.In-vitro assessment demonstrated that the CHI-LiCl composite scaffolds(CLiS)possessed favorable cytocompatibility,swelling and biodegradation.We created full-thickness skin wounds in male C57BL/c mice to evaluate the healing capacity of CLiS.Compared with the wounds of control and CHI scaffold(CS)groups,the wounds in the CLiS-treated group showed reduced inflammation,improved angiogenesis,accelerated re-epithelialization,sustained high expression ofβ-catenin with a small amount of regenerated hair follicles.Therefore,CLiS may be a promising therapeutic dressing for skin wound repair and regeneration.展开更多
基金supported,in part,by National Key Research and Development Plan(2018YFC1105704,2017YFC1103304,2016YFA0101000,2016YFA0101002)the National Nature Science Foundation of China(81871569,81830064,81721092)+1 种基金the CAMS Innovation Fund for Medical Sciences(CIFMS,2019-I2M-5-059)the Military Medical Research and Development Projects(AWS17J005,2019-126).
文摘The hair follicle(HF)is a highly conserved sensory organ associated with the immune response against pathogens,thermoregulation,sebum production,angiogenesis,neurogenesis and wound healing.Although recent advances in lineage-tracing techniques and the ability to profile gene expression in small populations of cells have increased the understanding of how stem cells operate during hair growth and regeneration,the construction of functional follicles with cycling activity is still a great challenge for the hair research field and for translational and clinical applications.Given that hair formation and cycling rely on tightly coordinated epithelial-mesenchymal interactions,we thus review potential cell sources with HF-inducive capacities and summarize current bioengineering strategies for HF regeneration with functional restoration.
基金This work was supported by the National Key Research&Development Program of China(2017YFC1104701 and 2017YFC1103300)the National Natural Science Foundation of China(81721092 and 81501669)the Key Research and Development Project of Hainan(ZDYF2016135 and ZDYF2017095).
文摘Small molecules loaded into biological materials present a promising strategy for stimulating endogenous repair mechanisms for in situ skin regeneration.Lithium can modulate various biologic processes,promoting proliferation,angiogenesis,and decreasing inflammation.However,its role in skin repair is rarely reported.In this study,we loaded lithium chloride(LiCl)into the chitosan(CHI)hydrogel and develop a sterile and biocompatible sponge scaffold through freeze-drying.In-vitro assessment demonstrated that the CHI-LiCl composite scaffolds(CLiS)possessed favorable cytocompatibility,swelling and biodegradation.We created full-thickness skin wounds in male C57BL/c mice to evaluate the healing capacity of CLiS.Compared with the wounds of control and CHI scaffold(CS)groups,the wounds in the CLiS-treated group showed reduced inflammation,improved angiogenesis,accelerated re-epithelialization,sustained high expression ofβ-catenin with a small amount of regenerated hair follicles.Therefore,CLiS may be a promising therapeutic dressing for skin wound repair and regeneration.
