BACKGROUND NLRP3-mediated pyroptosis is recognized as an essential modulator of renal disease pathology.Long noncoding RNAs(lncRNAs)are active participators of diabetic nephropathy(DN).X inactive specific transcript(X...BACKGROUND NLRP3-mediated pyroptosis is recognized as an essential modulator of renal disease pathology.Long noncoding RNAs(lncRNAs)are active participators of diabetic nephropathy(DN).X inactive specific transcript(XIST)expression has been reported to be elevated in the serum of DN patients.AIM To evaluate the mechanism of lncRNA XIST in renal tubular epithelial cell(RTEC)pyroptosis in DN.METHODS A DN rat model was established through streptozotocin injection,and XIST was knocked down by tail vein injection of the lentivirus LV sh-XIST.Renal metabolic and biochemical indices were detected,and pathological changes in the renal tissue were assessed.The expression of indicators related to inflammation and pyroptosis was also detected.High glucose(HG)was used to treat HK2 cells,and cell viability and lactate dehydrogenase(LDH)activity were detected after silencing XIST.The subcellular localization and downstream mechanism of XIST were investigated.Finally,a rescue experiment was carried out to verify that XIST regulates NLR family pyrin domain containing 3(NLRP3)/caspase-1-mediated RTEC pyroptosis through the microRNA-15-5p(miR-15b-5p)/Toll-like receptor 4(TLR4)axis.RESULTS XIST was highly expressed in the DN models.XIST silencing improved renal metabolism and biochemical indices and mitigated renal injury.The expression of inflammation and pyroptosis indicators was significantly increased in DN rats and HG-treated HK2 cells;cell viability was decreased and LDH activity was increased after HGtreatment. Silencing XIST inhibited RTEC pyroptosis by inhibiting NLRP3/caspase-1. Mechanistically,XIST sponged miR-15b-5p to regulate TLR4. Silencing XIST inhibited TLR4 by promotingmiR-15b-5p. miR-15b-5p inhibition or TLR4 overexpression averted the inhibitory effect ofsilencing XIST on HG-induced RTEC pyroptosis.CONCLUSIONSilencing XIST inhibits TLR4 by upregulating miR-15b-5p and ultimately inhibits renal injury inDN by inhibiting NLRP3/caspase-1-mediated RTEC pyroptosis.展开更多
BACKGROUND Long noncoding RNAs(lncRNAs)and mRNAs are widely involved in various physiological and pathological processes.The use of glucagon-like peptide-1 receptor agonists(GLP-1RAs)is a novel therapeutic strategy th...BACKGROUND Long noncoding RNAs(lncRNAs)and mRNAs are widely involved in various physiological and pathological processes.The use of glucagon-like peptide-1 receptor agonists(GLP-1RAs)is a novel therapeutic strategy that could promote insulin secretion and decrease the rate ofβ-cell apoptosis in type 2 diabetes mellitus(T2DM)patients.However,the specific lncRNAs and mRNAs and their functions in these processes have not been fully identified and elucidated.AIM To identify the lncRNAs and mRNAs that are involved in the protective effect of GLP-1RA inβcells,and their roles.METHODS Rat gene microarray was used to screen differentially expressed(DE)lncRNAs and mRNAs inβcells treated with geniposide,a GLP-1RA.Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analyses were performed to assess the underlying functions of DE mRNAs.Hub mRNAs were filtered using the STRING database and the Cytoscape plugin,CytoHubba.In order to reveal the regulatory relationship between lncRNAs and hub mRNAs,their co-expression network was constructed based on the Pearson coefficient of DE lncRNAs and mRNAs,and competing endogenous RNA(ceRNA)mechanism was explored through miRanda and TargetScan databases.RESULTS We identified 308 DE lncRNAs and 128 DE mRNAs with a fold change filter of≥1.5 and P value<0.05.GO and KEGG pathway enrichment analyses indicated that the most enriched terms were G-protein coupled receptor signaling pathway,inflammatory response,calcium signaling pathway,positive regulation of cell proliferation,and ERK1 and ERK2 cascade.Pomc,Htr2a,and Agtr1a were screened as hub mRNAs using the STRING database and the Cytoscape plugin,CytoHubba.This result was further verified using SwissTargetPrediction tool.Through the co-expression network and competing endogenous(ceRNA)mechanism,we identified seven lncRNAs(NONRATT027738,NONRATT027888,NONRATT030038,etc.)co-expressed with the three hub mRNAs(Pomc,Htr2a,and Agtr1a)based on the Pearson coefficient of the expression levels.These lncRNAs regulated hub mRNA functions by competing with six miRNAs(rno-miR-5132-3p,rno-miR-344g,rno-miR-3075,etc.)via the ceRNA mechanism.Further analysis indicated that lncRNA NONRATT027738 interacts with all the three hub mRNAs,suggesting that it is at a core position within the ceRNA network.CONCLUSION We have identified key lncRNAs and mRNAs,and highlighted here how they interact through the ceRNA mechanism to mediate the protective effect of GLP-1RA inβcells.展开更多
BACKGROUND Long noncoding RNAs(lncRNAs)have been identified to play important roles in the development and progression of various tumors,including gastric cancer(GC).However,the molecular role of lncRNAs in GC progres...BACKGROUND Long noncoding RNAs(lncRNAs)have been identified to play important roles in the development and progression of various tumors,including gastric cancer(GC).However,the molecular role of lncRNAs in GC progression remains unclear.AIM To investigate the differential expression of lncRNAs in human GC and elucidate the function and regulatory mechanism of LINC02407.METHODS The Cancer Genome Atlas database was used to investigate the involvement of lncRNAs in GC.Quantitative real-time polymerase chain reaction was used to estimate the relative expression level of LINC02407 in GC tissues and cells.Functional experiments including CCK8 assay,apoptosis assay,wound healing assay,and transwell assay were used to investigate the effect of LINC02407 on GC cells.Some microRNAs were predicted and verified via bioinformatics analysis and the luciferase reporter system.Predictive analysis and Western blot assay were used to analyze the expression of related proteins.RESULTS Many differentially expressed lncRNAs were identified in GC,and some of them including LINC02407 can affect the survival.LINC02407 was upregulated in tumor tissues compared with adjacent tissues.HGC-27 cells showed the highest LINC02407 expression and HaCaT cells exhibited the lowest expression.Different experiment groups were constructed using LINC02407 overexpressing plasmids and related siRNAs.The results of functional experiments showed that LINC02407 can promote the proliferation,migration,and invasion of GC cells but inhibit apoptosis.Luciferase reporter assay showed that hsa-miR-6845-5p and hsa-miR-4455 was downstream regulated by LINC02407.Western blot analysis showed that adhesion G protein-coupled receptor D1(ADGRD1)was regulated by the LINC02407-miR-6845-5p/miR-4455-ADGRD1 pathways.CONCLUSION LINC02407 plays a role in GC through the LINC02407-miR-6845-5p/miR-4455-ADGRD1 pathways,and thus,it may be an important oncogene and has potential value in GC diagnosis and treatment.展开更多
目的探讨长链非编码RNA(lncRNA)TCONS_00016478通过调控过氧化物酶增殖物激活受体γ辅助激活因子1α(PGC-1α)/过氧化物酶增殖物激活受体γ(PPARγ)信号通路影响实验性房颤兔心房肌能量代谢重构的机制。方法采用高通量二代测序技术检测...目的探讨长链非编码RNA(lncRNA)TCONS_00016478通过调控过氧化物酶增殖物激活受体γ辅助激活因子1α(PGC-1α)/过氧化物酶增殖物激活受体γ(PPARγ)信号通路影响实验性房颤兔心房肌能量代谢重构的机制。方法采用高通量二代测序技术检测房颤兔/非房颤兔右心房组织差异性表达lncRNAs,成年新西兰白兔18只,体质量2.0～2.5 kg,雌雄不拘,随机分为假手术组(行开胸术但不注射病毒)、阴性对照慢病毒组(右心房注射阴性对照慢病毒)和TCONS_00016478沉默慢病毒组(右心房注射TCONS_00016478沉默慢病毒),每组6只。感染病毒前及感染1周后分别使用心脏电生理仪行程序电刺激,检测心房有效不应期(AERP)与房颤诱发性。感染病毒1周后处死动物,取心房肌组织,采用qRT-PCR法检测RNA的表达,采用Western blotting法检测蛋白质的表达,采用PAS染色法和油红O染色法分别检测糖原和脂滴沉积。结果与感染病毒前相比,感染病毒1周后,TCONS_00016478沉默慢病毒组AERP缩短(80.667±1.453 vs 71.750±2.411,t=3.168,P=0.034);假手术组(80.083±1.044 vs 79.333±0.333,t=0.684,P=0.531)与阴性对照慢病毒组(81.083±2.599 vs 80.000±2.646,t=0.022,P=0.983)手术前后AERP差异无统计学意义。TCONS_00016478沉默慢病毒组病毒感染1周后,3只诱发房颤,假手术组和阴性对照慢病毒组均未诱发房颤。假手术组、阴性对照慢病毒组及TCONS_00016478沉默慢病毒组心房肌TCONS_00016478(F=126.042,P<0.001)、PGC-1α(F=43.998,P<0.001)、PPARγ(F=417.863,P<0.001)、葡萄糖转运蛋白-4(GLUT4)(F=98.043,P<0.001)及碱棕榈酰转移酶-1(CPT1)(F=105.096,P<0.001)基因表达量均差异有统计学意义。与假手术组相比,TCONS_00016478沉默慢病毒组心房肌TCONS_00016478在基因水平表达量降低(P<0.001),与能量代谢相关的蛋白质PGC-1α、PPARγ、GLUT4、CPT1在基因水平表达量降低(P<0.001),蛋白质水平表达量亦下降,差异有统计学意义(P<0.001);生物信息学分析表明,lncRNA TCONS_00016478及其靶基因PGC-1α与心肌能量代谢密切相关。心房肌细胞糖原和脂滴异常沉积。结论 TCONS_00016478通过调控PGC-1α/PPARγ信号通路影响心房肌能量代谢重构,进而调控房颤发生。展开更多
基金Supported by Natural Science Foundation of Shenzhen University General Hospital (SUGH2020QD011)
文摘BACKGROUND NLRP3-mediated pyroptosis is recognized as an essential modulator of renal disease pathology.Long noncoding RNAs(lncRNAs)are active participators of diabetic nephropathy(DN).X inactive specific transcript(XIST)expression has been reported to be elevated in the serum of DN patients.AIM To evaluate the mechanism of lncRNA XIST in renal tubular epithelial cell(RTEC)pyroptosis in DN.METHODS A DN rat model was established through streptozotocin injection,and XIST was knocked down by tail vein injection of the lentivirus LV sh-XIST.Renal metabolic and biochemical indices were detected,and pathological changes in the renal tissue were assessed.The expression of indicators related to inflammation and pyroptosis was also detected.High glucose(HG)was used to treat HK2 cells,and cell viability and lactate dehydrogenase(LDH)activity were detected after silencing XIST.The subcellular localization and downstream mechanism of XIST were investigated.Finally,a rescue experiment was carried out to verify that XIST regulates NLR family pyrin domain containing 3(NLRP3)/caspase-1-mediated RTEC pyroptosis through the microRNA-15-5p(miR-15b-5p)/Toll-like receptor 4(TLR4)axis.RESULTS XIST was highly expressed in the DN models.XIST silencing improved renal metabolism and biochemical indices and mitigated renal injury.The expression of inflammation and pyroptosis indicators was significantly increased in DN rats and HG-treated HK2 cells;cell viability was decreased and LDH activity was increased after HGtreatment. Silencing XIST inhibited RTEC pyroptosis by inhibiting NLRP3/caspase-1. Mechanistically,XIST sponged miR-15b-5p to regulate TLR4. Silencing XIST inhibited TLR4 by promotingmiR-15b-5p. miR-15b-5p inhibition or TLR4 overexpression averted the inhibitory effect ofsilencing XIST on HG-induced RTEC pyroptosis.CONCLUSIONSilencing XIST inhibits TLR4 by upregulating miR-15b-5p and ultimately inhibits renal injury inDN by inhibiting NLRP3/caspase-1-mediated RTEC pyroptosis.
基金the National Natural Science Foundation of China,No.81670710,No.81770776,and No.81973378Cultivation of Scientific Research Excellence Programs of Higher Education Institutions in Shanxi,No.2019KJ022+6 种基金Advanced Programs of Shanxi for the Returned Overseas Chinese Scholars,No.2016-97Research Project Supported by the Shanxi Scholarship Council of China,No.2017-053FSKSC and 1331KSC,Department of Education Innovation Project in Shanxi Province,No.2019BY078Shanxi Youth Science and Technology Research Fund,No.201901D211323the Innovation and Entrepreneurship Training Program for College Students in Shanxi Province,No.2019165and 136 Project in Shanxi Bethune Hospital,No.2019XY015The authors would like to acknowledge Tao Bai for skillful technical assistance。
文摘BACKGROUND Long noncoding RNAs(lncRNAs)and mRNAs are widely involved in various physiological and pathological processes.The use of glucagon-like peptide-1 receptor agonists(GLP-1RAs)is a novel therapeutic strategy that could promote insulin secretion and decrease the rate ofβ-cell apoptosis in type 2 diabetes mellitus(T2DM)patients.However,the specific lncRNAs and mRNAs and their functions in these processes have not been fully identified and elucidated.AIM To identify the lncRNAs and mRNAs that are involved in the protective effect of GLP-1RA inβcells,and their roles.METHODS Rat gene microarray was used to screen differentially expressed(DE)lncRNAs and mRNAs inβcells treated with geniposide,a GLP-1RA.Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analyses were performed to assess the underlying functions of DE mRNAs.Hub mRNAs were filtered using the STRING database and the Cytoscape plugin,CytoHubba.In order to reveal the regulatory relationship between lncRNAs and hub mRNAs,their co-expression network was constructed based on the Pearson coefficient of DE lncRNAs and mRNAs,and competing endogenous RNA(ceRNA)mechanism was explored through miRanda and TargetScan databases.RESULTS We identified 308 DE lncRNAs and 128 DE mRNAs with a fold change filter of≥1.5 and P value<0.05.GO and KEGG pathway enrichment analyses indicated that the most enriched terms were G-protein coupled receptor signaling pathway,inflammatory response,calcium signaling pathway,positive regulation of cell proliferation,and ERK1 and ERK2 cascade.Pomc,Htr2a,and Agtr1a were screened as hub mRNAs using the STRING database and the Cytoscape plugin,CytoHubba.This result was further verified using SwissTargetPrediction tool.Through the co-expression network and competing endogenous(ceRNA)mechanism,we identified seven lncRNAs(NONRATT027738,NONRATT027888,NONRATT030038,etc.)co-expressed with the three hub mRNAs(Pomc,Htr2a,and Agtr1a)based on the Pearson coefficient of the expression levels.These lncRNAs regulated hub mRNA functions by competing with six miRNAs(rno-miR-5132-3p,rno-miR-344g,rno-miR-3075,etc.)via the ceRNA mechanism.Further analysis indicated that lncRNA NONRATT027738 interacts with all the three hub mRNAs,suggesting that it is at a core position within the ceRNA network.CONCLUSION We have identified key lncRNAs and mRNAs,and highlighted here how they interact through the ceRNA mechanism to mediate the protective effect of GLP-1RA inβcells.
基金Supported by the Science and Technology Department of Jilin Province,No.20160101028JCthe Special Funds of Provincial Strategic Adjustment of Economic Structure to Guide in Jilin Province,No.2014G074
文摘BACKGROUND Long noncoding RNAs(lncRNAs)have been identified to play important roles in the development and progression of various tumors,including gastric cancer(GC).However,the molecular role of lncRNAs in GC progression remains unclear.AIM To investigate the differential expression of lncRNAs in human GC and elucidate the function and regulatory mechanism of LINC02407.METHODS The Cancer Genome Atlas database was used to investigate the involvement of lncRNAs in GC.Quantitative real-time polymerase chain reaction was used to estimate the relative expression level of LINC02407 in GC tissues and cells.Functional experiments including CCK8 assay,apoptosis assay,wound healing assay,and transwell assay were used to investigate the effect of LINC02407 on GC cells.Some microRNAs were predicted and verified via bioinformatics analysis and the luciferase reporter system.Predictive analysis and Western blot assay were used to analyze the expression of related proteins.RESULTS Many differentially expressed lncRNAs were identified in GC,and some of them including LINC02407 can affect the survival.LINC02407 was upregulated in tumor tissues compared with adjacent tissues.HGC-27 cells showed the highest LINC02407 expression and HaCaT cells exhibited the lowest expression.Different experiment groups were constructed using LINC02407 overexpressing plasmids and related siRNAs.The results of functional experiments showed that LINC02407 can promote the proliferation,migration,and invasion of GC cells but inhibit apoptosis.Luciferase reporter assay showed that hsa-miR-6845-5p and hsa-miR-4455 was downstream regulated by LINC02407.Western blot analysis showed that adhesion G protein-coupled receptor D1(ADGRD1)was regulated by the LINC02407-miR-6845-5p/miR-4455-ADGRD1 pathways.CONCLUSION LINC02407 plays a role in GC through the LINC02407-miR-6845-5p/miR-4455-ADGRD1 pathways,and thus,it may be an important oncogene and has potential value in GC diagnosis and treatment.
文摘目的探讨长链非编码RNA(lncRNA)TCONS_00016478通过调控过氧化物酶增殖物激活受体γ辅助激活因子1α(PGC-1α)/过氧化物酶增殖物激活受体γ(PPARγ)信号通路影响实验性房颤兔心房肌能量代谢重构的机制。方法采用高通量二代测序技术检测房颤兔/非房颤兔右心房组织差异性表达lncRNAs,成年新西兰白兔18只,体质量2.0～2.5 kg,雌雄不拘,随机分为假手术组(行开胸术但不注射病毒)、阴性对照慢病毒组(右心房注射阴性对照慢病毒)和TCONS_00016478沉默慢病毒组(右心房注射TCONS_00016478沉默慢病毒),每组6只。感染病毒前及感染1周后分别使用心脏电生理仪行程序电刺激,检测心房有效不应期(AERP)与房颤诱发性。感染病毒1周后处死动物,取心房肌组织,采用qRT-PCR法检测RNA的表达,采用Western blotting法检测蛋白质的表达,采用PAS染色法和油红O染色法分别检测糖原和脂滴沉积。结果与感染病毒前相比,感染病毒1周后,TCONS_00016478沉默慢病毒组AERP缩短(80.667±1.453 vs 71.750±2.411,t=3.168,P=0.034);假手术组(80.083±1.044 vs 79.333±0.333,t=0.684,P=0.531)与阴性对照慢病毒组(81.083±2.599 vs 80.000±2.646,t=0.022,P=0.983)手术前后AERP差异无统计学意义。TCONS_00016478沉默慢病毒组病毒感染1周后,3只诱发房颤,假手术组和阴性对照慢病毒组均未诱发房颤。假手术组、阴性对照慢病毒组及TCONS_00016478沉默慢病毒组心房肌TCONS_00016478(F=126.042,P<0.001)、PGC-1α(F=43.998,P<0.001)、PPARγ(F=417.863,P<0.001)、葡萄糖转运蛋白-4(GLUT4)(F=98.043,P<0.001)及碱棕榈酰转移酶-1(CPT1)(F=105.096,P<0.001)基因表达量均差异有统计学意义。与假手术组相比,TCONS_00016478沉默慢病毒组心房肌TCONS_00016478在基因水平表达量降低(P<0.001),与能量代谢相关的蛋白质PGC-1α、PPARγ、GLUT4、CPT1在基因水平表达量降低(P<0.001),蛋白质水平表达量亦下降,差异有统计学意义(P<0.001);生物信息学分析表明,lncRNA TCONS_00016478及其靶基因PGC-1α与心肌能量代谢密切相关。心房肌细胞糖原和脂滴异常沉积。结论 TCONS_00016478通过调控PGC-1α/PPARγ信号通路影响心房肌能量代谢重构,进而调控房颤发生。
