ROP(Rho-related GTPases from plants)是一类信号小G蛋白,为高等植物所特有,且分布广泛。近年来已引起社会的广泛关注,从各种植物中分离出的Rop数量也在逐渐增加。本研究分析了多年以来拟南芥、水稻、大麦、番茄、烟草、辣椒、马铃薯...ROP(Rho-related GTPases from plants)是一类信号小G蛋白,为高等植物所特有,且分布广泛。近年来已引起社会的广泛关注,从各种植物中分离出的Rop数量也在逐渐增加。本研究分析了多年以来拟南芥、水稻、大麦、番茄、烟草、辣椒、马铃薯等植物中小G蛋白ROPs生物学功能研究进展,并对小G蛋白ROPs在生物学功能上的最新研究进行综述,为研究其他植物小G蛋白ROPs奠定基础,进而为其他植物ROP蛋白功能研究提供借鉴。展开更多
All of the Rho GTPase seems to form a special sub-family,because such a sub-family has so far only found in plants,and then named Rop GTPase,which directly involved in and regulated of muscle actin cytoskeletal reorga...All of the Rho GTPase seems to form a special sub-family,because such a sub-family has so far only found in plants,and then named Rop GTPase,which directly involved in and regulated of muscle actin cytoskeletal reorganization,such as a series of signal transductions.The efficient purification technology and the means of ROP GTPase in wheat are the key basis of the studies on its functions and prosperities.And it has a very important theoretical and practical significance in the signal transduction and F-act...展开更多
2023年4月,山东农业大学生命科学学院张彦和李厦教授团队在《Plant Physiology》在线发表题为“RHO of plant proteins are essential for pollen germination in Arabidopsis”的研究论文,阐明了拟南芥BDR8及BDR9作为ROP的下游效应因子...2023年4月,山东农业大学生命科学学院张彦和李厦教授团队在《Plant Physiology》在线发表题为“RHO of plant proteins are essential for pollen germination in Arabidopsis”的研究论文,阐明了拟南芥BDR8及BDR9作为ROP的下游效应因子,在ROP调控花粉萌发过程中发挥关键作用。展开更多
BACKGROUND Inflammatory bowel disease（IBD） is characterized by chronic and non-specific inflammation of the intestinal mucosa and mainly includes ulcerative colitis and Crohn’s disease.AIM To explore the beneficial...BACKGROUND Inflammatory bowel disease（IBD） is characterized by chronic and non-specific inflammation of the intestinal mucosa and mainly includes ulcerative colitis and Crohn’s disease.AIM To explore the beneficial effect of Toxo ROP16Ⅰ/Ⅲ-induced M2 phynotype macrophages in homeostasis of IBDs through downregulation of M1 inflammatory cells.METHODS RAW264.7 macrophages stimulated by lipopolysaccharide（LPS）（M1 cells） were co-cultured with Caco-2 cells as an inflammatory model of IBD in vitro.The expression of Toxo ROP16Ⅰ/Ⅲ was observed in RAW264.7 macrophages that were transfected with p EGFP-rop16Ⅰ/Ⅲ.The phenotypes of M2 and M1 macrophage cells were assessed by quantitative real-time reverse transcriptase polymerase chain reaction and the expression of tumor necrosis factor（TNF）-α,interleukin（IL）-1β,IL-6,transforming growth factor（TGF）-β1,IL-10,inducible nitric oxide synthase（i NOS）,and arginase-1（Arg-1） was detected.The expression of i NOS,Arg-1,signal transducer and activator of transcription 3（Stat3）,p-Stat3,Stat6,pStat6,programmed death ligand-2（PD-L2）,caspase-3,-8,and-9 was analyzed by Western blotting,and Griess assays were performed to detect nitric oxide（NO）.TNF-α,IL-1β,IL-6,TGF-β1,and IL-10 expression in the supernatants was detected by enzyme-linked immunosorbent assay,and Caco-2 cell apoptosis was determined by flow cytometry after mixing M1 cells with M2 cells in a Caco-2 cell co-culture system.RESULTS M1 cells exhibited significantly increased production of i NOS,NO,TNF-α,IL-1β,and IL-6,while Toxo ROP16Ⅰ/Ⅲ induced macrophage bias to M2 cells in vitro,showing increased expression of Arg-1,IL-10 and TGF-β1 and elevated production of p-Stat3 and p-Stat6.The mixed M1 and M2 cell culture induced by Toxo ROP16 Ⅰ/Ⅲ exhibited decreased production of NO and i NOS and upregulated expression of Arg-1 and PD-L2.Accordingly,Caco-2 cells became apoptotic,and apoptosis-associated proteins such as caspase-3,-8 and-9 were dampened during co-culture of M1 and M2 cells.Flow cytometry analysis showed that co-culture of M1 cells with Caco-2 cells facilitated the apoptosis of Caco-2 cells,but co-culture of M1 and M2 cells alleviated Caco-2 cell apoptosis.CONCLUSION Toxo ROP16 Ⅰ/Ⅲ-induced M2 macrophages inhibited apoptosis of Caco-2 cells caused by M1 macrophages.This finding may help gain a better understanding of the underlying mechanism and represent a promising therapeutic strategy for IBDs.展开更多
文摘ROP(Rho-related GTPases from plants)是一类信号小G蛋白,为高等植物所特有,且分布广泛。近年来已引起社会的广泛关注,从各种植物中分离出的Rop数量也在逐渐增加。本研究分析了多年以来拟南芥、水稻、大麦、番茄、烟草、辣椒、马铃薯等植物中小G蛋白ROPs生物学功能研究进展,并对小G蛋白ROPs在生物学功能上的最新研究进行综述,为研究其他植物小G蛋白ROPs奠定基础,进而为其他植物ROP蛋白功能研究提供借鉴。
基金Supported by National Natural Science Foundation(30671061)Shanxi Province Natural Science Foundation(2008011059-1)~~
文摘All of the Rho GTPase seems to form a special sub-family,because such a sub-family has so far only found in plants,and then named Rop GTPase,which directly involved in and regulated of muscle actin cytoskeletal reorganization,such as a series of signal transductions.The efficient purification technology and the means of ROP GTPase in wheat are the key basis of the studies on its functions and prosperities.And it has a very important theoretical and practical significance in the signal transduction and F-act...
文摘2023年4月,山东农业大学生命科学学院张彦和李厦教授团队在《Plant Physiology》在线发表题为“RHO of plant proteins are essential for pollen germination in Arabidopsis”的研究论文,阐明了拟南芥BDR8及BDR9作为ROP的下游效应因子,在ROP调控花粉萌发过程中发挥关键作用。
基金Supported by the National Natural Science Foundation of China,No.81471983the Key Research and Development Plan Project of Anhui Province,Department of Science and Technology 2019,No.201904a07020043+1 种基金the Key Project of Natural Science Research in the Universities of Anhui Provence,No.KJ2017A202the Research Fund Project of Anhui Institute of Transforming Medicine,No.2017zhyx04
文摘BACKGROUND Inflammatory bowel disease（IBD） is characterized by chronic and non-specific inflammation of the intestinal mucosa and mainly includes ulcerative colitis and Crohn’s disease.AIM To explore the beneficial effect of Toxo ROP16Ⅰ/Ⅲ-induced M2 phynotype macrophages in homeostasis of IBDs through downregulation of M1 inflammatory cells.METHODS RAW264.7 macrophages stimulated by lipopolysaccharide（LPS）（M1 cells） were co-cultured with Caco-2 cells as an inflammatory model of IBD in vitro.The expression of Toxo ROP16Ⅰ/Ⅲ was observed in RAW264.7 macrophages that were transfected with p EGFP-rop16Ⅰ/Ⅲ.The phenotypes of M2 and M1 macrophage cells were assessed by quantitative real-time reverse transcriptase polymerase chain reaction and the expression of tumor necrosis factor（TNF）-α,interleukin（IL）-1β,IL-6,transforming growth factor（TGF）-β1,IL-10,inducible nitric oxide synthase（i NOS）,and arginase-1（Arg-1） was detected.The expression of i NOS,Arg-1,signal transducer and activator of transcription 3（Stat3）,p-Stat3,Stat6,pStat6,programmed death ligand-2（PD-L2）,caspase-3,-8,and-9 was analyzed by Western blotting,and Griess assays were performed to detect nitric oxide（NO）.TNF-α,IL-1β,IL-6,TGF-β1,and IL-10 expression in the supernatants was detected by enzyme-linked immunosorbent assay,and Caco-2 cell apoptosis was determined by flow cytometry after mixing M1 cells with M2 cells in a Caco-2 cell co-culture system.RESULTS M1 cells exhibited significantly increased production of i NOS,NO,TNF-α,IL-1β,and IL-6,while Toxo ROP16Ⅰ/Ⅲ induced macrophage bias to M2 cells in vitro,showing increased expression of Arg-1,IL-10 and TGF-β1 and elevated production of p-Stat3 and p-Stat6.The mixed M1 and M2 cell culture induced by Toxo ROP16 Ⅰ/Ⅲ exhibited decreased production of NO and i NOS and upregulated expression of Arg-1 and PD-L2.Accordingly,Caco-2 cells became apoptotic,and apoptosis-associated proteins such as caspase-3,-8 and-9 were dampened during co-culture of M1 and M2 cells.Flow cytometry analysis showed that co-culture of M1 cells with Caco-2 cells facilitated the apoptosis of Caco-2 cells,but co-culture of M1 and M2 cells alleviated Caco-2 cell apoptosis.CONCLUSION Toxo ROP16 Ⅰ/Ⅲ-induced M2 macrophages inhibited apoptosis of Caco-2 cells caused by M1 macrophages.This finding may help gain a better understanding of the underlying mechanism and represent a promising therapeutic strategy for IBDs.
