BACKGROUND Osteoporosis is a common metabolic bone disorder induced by an imbalance between osteoclastic activity and osteogenic activity.During osteoporosis,bone mesenchymal stem cells(BMSCs)exhibit an increased abil...BACKGROUND Osteoporosis is a common metabolic bone disorder induced by an imbalance between osteoclastic activity and osteogenic activity.During osteoporosis,bone mesenchymal stem cells(BMSCs)exhibit an increased ability to differentiate into adipocytes and a decreased ability to differentiate into osteoblasts,resulting in bone loss.Jumonji domain-containing 1C(JMJD1C)has been demonstrated to suppress osteoclastogenesis.AIM To examine the effect of JMJD1C on the osteogenesis of BMSCs and the potential underlying mechanism.METHODS BMSCs were isolated from mouse bone marrow tissues.Oil Red O staining,Alizarin red staining,alkaline phosphatase staining and the expression of adipo-genic and osteogenic-associated genes were assessed to determine the differen-tiation of BMSCs.Bone marrow-derived macrophages(BMMs)were incubated with receptor activator of nuclear factor-kappaΒligand to induce osteoclast differentiation,and osteoclast differen-tiation was confirmed by tartrate-resistant acid phosphatase staining.Other related genes were measured via reverse transcription coupled to the quantitative polymerase chain reaction and western blotting.Enzyme-linked immunosorbent assays were used to measure the levels of inflammatory cytokines,including tumor necrosis factor alpha,interleukin-6 and interleukin-1 beta.RESULTS The osteogenic and adipogenic differentiation potential of BMSCs isolated from mouse bone marrow samples was evaluated.JMJD1C mRNA and protein expression was upregulated in BMSCs after osteoblast induction,while p-nuclear factor-κB(NF-κB)and inflammatory cytokines were not significantly altered.Knockdown of JMJD1C repressed osteogenic differentiation and enhanced NF-κB activation and inflammatory cytokine release in BMSCs.Moreover,JMJD1C expression decreased during BMM osteoclast differentiation.CONCLUSION The JMJD1C/NF-κB signaling pathway is potentially involved in BMSC osteogenic differentiation and may play vital roles in the pathogenesis of osteoporosis.展开更多
BACKGROUND The expression of jumonji domain-containing 3(Jmjd3)and trimethylated H3 lysine 27(H3K27me3)in active ulcerative colitis(UC)and the correlation between vitamin D receptor(VDR)and the Jmjd3 pathway are unkno...BACKGROUND The expression of jumonji domain-containing 3(Jmjd3)and trimethylated H3 lysine 27(H3K27me3)in active ulcerative colitis(UC)and the correlation between vitamin D receptor(VDR)and the Jmjd3 pathway are unknown.AIM To study the relationship between VDR,Jmjd3 and H3K27me3 in patients with active UC.METHODS One hundred patients with active UC and 56 healthy controls were enrolled in this study.The patients with active UC were divided into groups according to mild(n=29),moderate(n=32)and severe(n=29)disease activity based on the modified Mayo score.Vitamin D levels were measured by radioimmunoassay.Colonic mucosal tissues from UC patients and controls were collected by colonoscopy.The expression of VDR,Jmjd3 and H3K27me3 in the intestinal mucosa was determined by immunohistochemistry staining.RESULTS Patients with active UC had lower levels of serum vitamin D(13.7±2.8 ng/mL,P<0.001)than the controls(16.2±2.5 ng/mL).In the UC cohort,serum vitamin D level was negatively correlated with disease activity(r=-0.323,P=0.001).VDR expression in the mucosa of UC patients was reduced compared to that in normal tissues(P<0.001)and negatively correlated with disease activity(r=-0.868,P<0.001).Similar results for VDR expression were noted in the most serious lesion(defined as UC diseased)and 20 cm proximal to the anus(defined as UC normal)(P<0.05).Simultaneously,Jmjd3 expression significantly increased in UC patients(P<0.001),but no difference was found between the different sites in UC patients.H3K27me3 expression in UC patients was significantly down-regulated when compared with normal tissues(P<0.001),but up-regulated in the mild disease activity group in comparison with the moderate disease activity group of UC patients(P<0.05).Jmjd3 Level was negatively correlated with the level of VDR(r=-0.342,P=0.002)and H3K27me3(r=-0.341,P=0.002),while VDR level was positively correlated with H3K27me3(r=0.473,P<0.001).CONCLUSION Serum vitamin D and VDR were inversely correlated with disease activity in active UC.Jmjd3 expression increased in the colonic mucosa of active UC patients and was negatively associated with VDR and H3K27me3 level.展开更多
目的探讨GSK-J4通过抑制组蛋白去甲基化酶含Jumonji结构域蛋白3(Jumonji domain-containing protein 3,Jmjd3)并上调H3K27me3的表达影响HepG2肝癌细胞凋亡和侵袭的分子机制。方法体外培养人正常肝细胞L02及人肝细胞肝癌(hepatocellular ...目的探讨GSK-J4通过抑制组蛋白去甲基化酶含Jumonji结构域蛋白3(Jumonji domain-containing protein 3,Jmjd3)并上调H3K27me3的表达影响HepG2肝癌细胞凋亡和侵袭的分子机制。方法体外培养人正常肝细胞L02及人肝细胞肝癌(hepatocellular carcinoma,HCC)细胞株HepG2、SMMC7721,RT-PCR检测Jmjd3 m RNA表达,Western blot检测Jmjd3、H3K27me3蛋白表达;CCK-8法检测不同浓度GSK-J4(0、10、30、50μmol/mL)处理HepG2后增殖能力;流式细胞仪检测凋亡率;Transwell检测细胞侵袭力;Western blot检测Jmjd3、H3K27me3和凋亡相关蛋白Bcl2、Bax、Caspase3、上皮细胞间质转化(epithelial-mesenchymal transition,EMT)相关标记物E-钙黏蛋白(E-cadherin)、波形蛋白(Vimentin)以及p-STAT3、STAT3蛋白表达。结果与L02比,Jmjd3高表达,H3K27me3低表达于HepG2、SMMC7721肝癌细胞株(P<0.05);GSK-J4抑制HepG2增殖(P<0.05);GSK-J4处理组细胞凋亡率明显提高,细胞侵袭能力减弱(P<0.05);GSK-J4处理HepG2后Jmjd3水平降低,H3K27me3水平增高,Bcl2水平降低,Bax、Caspase3水平增高,E-cadherin表达增高,Vimentin水平降低(P<0.05);p-STAT3表达下调(P<0.01)。结论 GSK-J4通过抑制Jmjd3并上调H3K27me3表达而诱导HepG2发生凋亡并减弱侵袭,其可能与抑制EMT形成和STAT3的磷酸化有关。展开更多
目的研究小干扰RNA(siRNA)抑制含Jumonji结构域蛋白3(JMJD3)基因对肝癌细胞QGY-7703和HepG2的生长、增殖和侵袭能力的影响。方法利用RNA干扰技术沉默JMJD3(siR-JMJD3),以非特异性序列(pSilencer 2.1)转染肝癌细胞QGY-7703细胞和HepG2细...目的研究小干扰RNA(siRNA)抑制含Jumonji结构域蛋白3(JMJD3)基因对肝癌细胞QGY-7703和HepG2的生长、增殖和侵袭能力的影响。方法利用RNA干扰技术沉默JMJD3(siR-JMJD3),以非特异性序列(pSilencer 2.1)转染肝癌细胞QGY-7703细胞和HepG2细胞作为阴性对照,采用四甲基噻唑蓝(MTT)法、集落形成、Transwell侵袭实验来检测肝癌细胞生长、增殖和侵袭能力的变化。结果 Western Blot检测结果显示,转染siR-JMJD3质粒的试验组成功抑制肝癌细胞中JMJD3的蛋白表达水平。MTT结果显示转入siR-JMJD3后,QGY-7703和HepG2细胞的生长活性与对照组相比分别降低了约25%和17%。集落形成结果显示2种细胞系的集落形成数分别降低了约31%和25%。Transwell侵袭实验结果显示穿膜细胞数分别下降了约44%和47%。结论应用siRNA技术能有效抑制JMJD3基因的表达,同时有效抑制肝癌细胞QGY-7703和HepG2体外生长、增殖和侵袭,为肝癌的生物学治疗提供了新思路。展开更多
基金2018 Henan Medical Science and Technology Research Plan Project,China,No.SBGJ2018019.
文摘BACKGROUND Osteoporosis is a common metabolic bone disorder induced by an imbalance between osteoclastic activity and osteogenic activity.During osteoporosis,bone mesenchymal stem cells(BMSCs)exhibit an increased ability to differentiate into adipocytes and a decreased ability to differentiate into osteoblasts,resulting in bone loss.Jumonji domain-containing 1C(JMJD1C)has been demonstrated to suppress osteoclastogenesis.AIM To examine the effect of JMJD1C on the osteogenesis of BMSCs and the potential underlying mechanism.METHODS BMSCs were isolated from mouse bone marrow tissues.Oil Red O staining,Alizarin red staining,alkaline phosphatase staining and the expression of adipo-genic and osteogenic-associated genes were assessed to determine the differen-tiation of BMSCs.Bone marrow-derived macrophages(BMMs)were incubated with receptor activator of nuclear factor-kappaΒligand to induce osteoclast differentiation,and osteoclast differen-tiation was confirmed by tartrate-resistant acid phosphatase staining.Other related genes were measured via reverse transcription coupled to the quantitative polymerase chain reaction and western blotting.Enzyme-linked immunosorbent assays were used to measure the levels of inflammatory cytokines,including tumor necrosis factor alpha,interleukin-6 and interleukin-1 beta.RESULTS The osteogenic and adipogenic differentiation potential of BMSCs isolated from mouse bone marrow samples was evaluated.JMJD1C mRNA and protein expression was upregulated in BMSCs after osteoblast induction,while p-nuclear factor-κB(NF-κB)and inflammatory cytokines were not significantly altered.Knockdown of JMJD1C repressed osteogenic differentiation and enhanced NF-κB activation and inflammatory cytokine release in BMSCs.Moreover,JMJD1C expression decreased during BMM osteoclast differentiation.CONCLUSION The JMJD1C/NF-κB signaling pathway is potentially involved in BMSC osteogenic differentiation and may play vital roles in the pathogenesis of osteoporosis.
基金Supported by The Key Projects of Natural Science Research of Anhui Province in China,No.201904a07020043.
文摘BACKGROUND The expression of jumonji domain-containing 3(Jmjd3)and trimethylated H3 lysine 27(H3K27me3)in active ulcerative colitis(UC)and the correlation between vitamin D receptor(VDR)and the Jmjd3 pathway are unknown.AIM To study the relationship between VDR,Jmjd3 and H3K27me3 in patients with active UC.METHODS One hundred patients with active UC and 56 healthy controls were enrolled in this study.The patients with active UC were divided into groups according to mild(n=29),moderate(n=32)and severe(n=29)disease activity based on the modified Mayo score.Vitamin D levels were measured by radioimmunoassay.Colonic mucosal tissues from UC patients and controls were collected by colonoscopy.The expression of VDR,Jmjd3 and H3K27me3 in the intestinal mucosa was determined by immunohistochemistry staining.RESULTS Patients with active UC had lower levels of serum vitamin D(13.7±2.8 ng/mL,P<0.001)than the controls(16.2±2.5 ng/mL).In the UC cohort,serum vitamin D level was negatively correlated with disease activity(r=-0.323,P=0.001).VDR expression in the mucosa of UC patients was reduced compared to that in normal tissues(P<0.001)and negatively correlated with disease activity(r=-0.868,P<0.001).Similar results for VDR expression were noted in the most serious lesion(defined as UC diseased)and 20 cm proximal to the anus(defined as UC normal)(P<0.05).Simultaneously,Jmjd3 expression significantly increased in UC patients(P<0.001),but no difference was found between the different sites in UC patients.H3K27me3 expression in UC patients was significantly down-regulated when compared with normal tissues(P<0.001),but up-regulated in the mild disease activity group in comparison with the moderate disease activity group of UC patients(P<0.05).Jmjd3 Level was negatively correlated with the level of VDR(r=-0.342,P=0.002)and H3K27me3(r=-0.341,P=0.002),while VDR level was positively correlated with H3K27me3(r=0.473,P<0.001).CONCLUSION Serum vitamin D and VDR were inversely correlated with disease activity in active UC.Jmjd3 expression increased in the colonic mucosa of active UC patients and was negatively associated with VDR and H3K27me3 level.
文摘目的研究小干扰RNA(siRNA)抑制含Jumonji结构域蛋白3(JMJD3)基因对肝癌细胞QGY-7703和HepG2的生长、增殖和侵袭能力的影响。方法利用RNA干扰技术沉默JMJD3(siR-JMJD3),以非特异性序列(pSilencer 2.1)转染肝癌细胞QGY-7703细胞和HepG2细胞作为阴性对照,采用四甲基噻唑蓝(MTT)法、集落形成、Transwell侵袭实验来检测肝癌细胞生长、增殖和侵袭能力的变化。结果 Western Blot检测结果显示,转染siR-JMJD3质粒的试验组成功抑制肝癌细胞中JMJD3的蛋白表达水平。MTT结果显示转入siR-JMJD3后,QGY-7703和HepG2细胞的生长活性与对照组相比分别降低了约25%和17%。集落形成结果显示2种细胞系的集落形成数分别降低了约31%和25%。Transwell侵袭实验结果显示穿膜细胞数分别下降了约44%和47%。结论应用siRNA技术能有效抑制JMJD3基因的表达,同时有效抑制肝癌细胞QGY-7703和HepG2体外生长、增殖和侵袭,为肝癌的生物学治疗提供了新思路。
