Photo-reactive poly(vinyl alcohol)(PRPVA)was synthesized by introduction of phenyl azido groups into poly(vinyl alcohol)(PVA)and applied for surface modification.PRPVA was grafted onto cell culture plate surface homog...Photo-reactive poly(vinyl alcohol)(PRPVA)was synthesized by introduction of phenyl azido groups into poly(vinyl alcohol)(PVA)and applied for surface modification.PRPVA was grafted onto cell culture plate surface homogeneously or in a micropattern.Human mesenchymal stem cells(hMSCs)cultured on cell culture plate surface and PVA-modified surface showed different behaviors.Cells adhered and spread well on cell culture plate surface,while they did not adhere on PVA-grafted surface at all.When hMSCs were cultured on PVA-micropatterned surface,they formed a cell micropattern.Cells formed pellets after cultured on PVA homogeneously modified surface in chondrogenic induction medium for 2 weeks.The pellets were positively stained by hematoxylin/eosin,safranin-O/fast green and toluidin blue,and they were also stained brown by Type II collagen and proteoglycan immunohistological staining.Real-time PCR analysis was conducted to investigate the expression of colI,colII,colX,aggrecan and sox9 mRNA.Results of gene expression were in agreement with those of histological and immunohistological observations.These results indicated that hMSCs cultured on PVA-modified surface performed chondrogenic differentiation,and it was possible to construct scaffold-free cartilage like pellets with PVA-modified surface in vitro.展开更多
Aphotoactive metal-organic complex[Zn2(BCbpe)2(p-DBC)2]∙5H2O(1) has been synthesized based on an olefin-containing pyridinium compound, 1-(4-carboxybenzyl)-4-[2-(4-pyridyl)-vinyl]pyridinium chloride(HBCbpeCl), and cha...Aphotoactive metal-organic complex[Zn2(BCbpe)2(p-DBC)2]∙5H2O(1) has been synthesized based on an olefin-containing pyridinium compound, 1-(4-carboxybenzyl)-4-[2-(4-pyridyl)-vinyl]pyridinium chloride(HBCbpeCl), and characterized by single-crystal X-ray diffraction, IR spectroscopy, powder X-ray diffraction and thermogravimetric analysis, respectively. In the solid state, the BCbpe ligands are packed in a head-to-tail manner through weak cation-π interaction, undergoing a photo-induced cycloaddition quantitatively upon UV-light irradiation.展开更多
基金This work was supported by Science and Technology Support Program of Sichuan Province[grant number 2016SZ0008]Guangxi Scientific Research and Technological Development Foundation[grant number Guikehe 14125008-2-14]Guangxi key research and development plan[grant number GuikeAB16450003],and the 111 Project[grant number B16033].
文摘Photo-reactive poly(vinyl alcohol)(PRPVA)was synthesized by introduction of phenyl azido groups into poly(vinyl alcohol)(PVA)and applied for surface modification.PRPVA was grafted onto cell culture plate surface homogeneously or in a micropattern.Human mesenchymal stem cells(hMSCs)cultured on cell culture plate surface and PVA-modified surface showed different behaviors.Cells adhered and spread well on cell culture plate surface,while they did not adhere on PVA-grafted surface at all.When hMSCs were cultured on PVA-micropatterned surface,they formed a cell micropattern.Cells formed pellets after cultured on PVA homogeneously modified surface in chondrogenic induction medium for 2 weeks.The pellets were positively stained by hematoxylin/eosin,safranin-O/fast green and toluidin blue,and they were also stained brown by Type II collagen and proteoglycan immunohistological staining.Real-time PCR analysis was conducted to investigate the expression of colI,colII,colX,aggrecan and sox9 mRNA.Results of gene expression were in agreement with those of histological and immunohistological observations.These results indicated that hMSCs cultured on PVA-modified surface performed chondrogenic differentiation,and it was possible to construct scaffold-free cartilage like pellets with PVA-modified surface in vitro.
基金This work was supported by the National Natural Science Foundation of China(Nos.21871027 and 21573016).
文摘Aphotoactive metal-organic complex[Zn2(BCbpe)2(p-DBC)2]∙5H2O(1) has been synthesized based on an olefin-containing pyridinium compound, 1-(4-carboxybenzyl)-4-[2-(4-pyridyl)-vinyl]pyridinium chloride(HBCbpeCl), and characterized by single-crystal X-ray diffraction, IR spectroscopy, powder X-ray diffraction and thermogravimetric analysis, respectively. In the solid state, the BCbpe ligands are packed in a head-to-tail manner through weak cation-π interaction, undergoing a photo-induced cycloaddition quantitatively upon UV-light irradiation.
