Urine-derived stem cells(USCs)have shown potentials for the treatment of skeletal and urological disorders.Based on published literature and our own data,USCs consist of heterogeneous populations of cells.In this pape...Urine-derived stem cells(USCs)have shown potentials for the treatment of skeletal and urological disorders.Based on published literature and our own data,USCs consist of heterogeneous populations of cells.In this paper,we identify and characterize two morphologically distinct subpopulations of USCs from human urine samples,named as spindle-shaped USCs(SS-USCs)and rice-shaped USCs(RS-USCs)respectively.The two subpopulations showed similar clone-forming efficiency,while SS-USCs featured faster proliferation,higher motility,and greater potential for osteogenic and adipogenic differentiation,RS-USCs showed greater potential for chondrogenic differentiation.POU5F1 was strongly expressed in both subpopulations,but MYC was weakly expressed.Both subpopulations showed similar patterns of CD24,CD29,CD34,CD44,CD73,CD90 and CD105 expression,while a higher percentage of RS-USCs were positive for CD133.SS-USCs were positive for VIM,weakly positive for SLC12A1 and UMOD,and negative for KRT18,NPHS1,AQP1 and AQP2,indicating a renal mesenchyme origin;while RSUSCs are positive for VIM,partially positive for KRT18,NPHS1,AQP1,SLC12A1 and UMOD,and negative for AQP2,indicating a nephron tubule origin.The above results can facilitate understanding of the biological characteristics of subpopulations of USCs,and provide a basis for further research and applications of such cells.展开更多
Endoscopic submucosal dissection(ESD)is the standard treatment for early-stage gastric cancer,but the large post-operative ulcers caused by ESD often lead to serious side effects.Post-ESD mu-cosal repair materials pro...Endoscopic submucosal dissection(ESD)is the standard treatment for early-stage gastric cancer,but the large post-operative ulcers caused by ESD often lead to serious side effects.Post-ESD mu-cosal repair materials provide a new option for the treatment of post-ESD ulcers.In this study,we developed a polyurethane/small intestinal submucosa(PU/SIS)hydrogel and investigated its effi-cacy for accelerating ESD-induced ulcer healing in a canine model.PU/SIS hydrogel possessed great biocompatibility and distinctive pH-sensitive swelling properties and protected GES-1 cells from acid attack through forming a dense film in acidic conditions in vitro.Besides,PU/SIS gels present a strong bio-adhesion to gastric tissues under acidic conditions,thus ensuring the reten-tion time of PU/SIS gels in vivo.In a canine model,PU/SIS hydrogel was easily delivered via endoscopy and adhered to the ulcer sites.PU/SIS hydrogel accelerated gastric ulcer healing at an early stage with more epithelium regeneration and slight inflammation.Our findings reveal PU/SIS hydrogel is a promising and attractive candidate for ESD-induced ulcer repair.展开更多
基金supported by the National Key Research&Development Program of China(2017YFC1104702)the National Natural Science Foundation of China(31771065,31600792,81473446)+1 种基金the Sichuan Science and Technology Program(2019JDRC0020)the 1.3.5 project for disciplines of excellence,West China Hospital,Sichuan University(ZYJC18002)。
文摘Urine-derived stem cells(USCs)have shown potentials for the treatment of skeletal and urological disorders.Based on published literature and our own data,USCs consist of heterogeneous populations of cells.In this paper,we identify and characterize two morphologically distinct subpopulations of USCs from human urine samples,named as spindle-shaped USCs(SS-USCs)and rice-shaped USCs(RS-USCs)respectively.The two subpopulations showed similar clone-forming efficiency,while SS-USCs featured faster proliferation,higher motility,and greater potential for osteogenic and adipogenic differentiation,RS-USCs showed greater potential for chondrogenic differentiation.POU5F1 was strongly expressed in both subpopulations,but MYC was weakly expressed.Both subpopulations showed similar patterns of CD24,CD29,CD34,CD44,CD73,CD90 and CD105 expression,while a higher percentage of RS-USCs were positive for CD133.SS-USCs were positive for VIM,weakly positive for SLC12A1 and UMOD,and negative for KRT18,NPHS1,AQP1 and AQP2,indicating a renal mesenchyme origin;while RSUSCs are positive for VIM,partially positive for KRT18,NPHS1,AQP1,SLC12A1 and UMOD,and negative for AQP2,indicating a nephron tubule origin.The above results can facilitate understanding of the biological characteristics of subpopulations of USCs,and provide a basis for further research and applications of such cells.
基金This work was supported by The National Key R&D Program of China(2017YFC1104702)Sichuan Science and Technology Program(2019JDRC0020)the 1.3.5 Project for Disciplines of Excellence,West China Hospital,Sichuan University(ZYJC18002).
文摘Endoscopic submucosal dissection(ESD)is the standard treatment for early-stage gastric cancer,but the large post-operative ulcers caused by ESD often lead to serious side effects.Post-ESD mu-cosal repair materials provide a new option for the treatment of post-ESD ulcers.In this study,we developed a polyurethane/small intestinal submucosa(PU/SIS)hydrogel and investigated its effi-cacy for accelerating ESD-induced ulcer healing in a canine model.PU/SIS hydrogel possessed great biocompatibility and distinctive pH-sensitive swelling properties and protected GES-1 cells from acid attack through forming a dense film in acidic conditions in vitro.Besides,PU/SIS gels present a strong bio-adhesion to gastric tissues under acidic conditions,thus ensuring the reten-tion time of PU/SIS gels in vivo.In a canine model,PU/SIS hydrogel was easily delivered via endoscopy and adhered to the ulcer sites.PU/SIS hydrogel accelerated gastric ulcer healing at an early stage with more epithelium regeneration and slight inflammation.Our findings reveal PU/SIS hydrogel is a promising and attractive candidate for ESD-induced ulcer repair.
