We previously showed that hydrogen sulfide(H2S)has a neuroprotective effect in the context of hypoxic ischemic brain injury in neonatal mice.However,the precise mechanism underlying the role of H2S in this situation r...We previously showed that hydrogen sulfide(H2S)has a neuroprotective effect in the context of hypoxic ischemic brain injury in neonatal mice.However,the precise mechanism underlying the role of H2S in this situation remains unclear.In this study,we used a neonatal mouse model of hypoxic ischemic brain injury and a lipopolysaccharide-stimulated BV2 cell model and found that treatment with L-cysteine,a H2S precursor,attenuated the cerebral infarction and cerebral atrophy induced by hypoxia and ischemia and increased the expression of miR-9-5p and cystathionineβsynthase(a major H2S synthetase in the brain)in the prefrontal cortex.We also found that an miR-9-5p inhibitor blocked the expression of cystathionineβsynthase in the prefrontal cortex in mice with brain injury caused by hypoxia and ischemia.Furthermore,miR-9-5p overexpression increased cystathionine-β-synthase and H2S expression in the injured prefrontal cortex of mice with hypoxic ischemic brain injury.L-cysteine decreased the expression of CXCL11,an miR-9-5p target gene,in the prefrontal cortex of the mouse model and in lipopolysaccharide-stimulated BV-2 cells and increased the levels of proinflammatory cytokines BNIP3,FSTL1,SOCS2 and SOCS5,while treatment with an miR-9-5p inhibitor reversed these changes.These findings suggest that H2S can reduce neuroinflammation in a neonatal mouse model of hypoxic ischemic brain injury through regulating the miR-9-5p/CXCL11 axis and restoringβ-synthase expression,thereby playing a role in reducing neuroinflammation in hypoxic ischemic brain injury.展开更多
目的:探讨长链非编码RNA TFAP2A-AS1对子宫内膜癌细胞增殖、侵袭和迁移的影响及机制。方法:选择50例子宫内膜癌组织和对应的癌旁组织。选取子宫内膜癌细胞株(RL95-2、HEC-1A、HHUA、HEC-1B及Ishikawa),子宫内膜上皮细胞hEEC。子宫内膜...目的:探讨长链非编码RNA TFAP2A-AS1对子宫内膜癌细胞增殖、侵袭和迁移的影响及机制。方法:选择50例子宫内膜癌组织和对应的癌旁组织。选取子宫内膜癌细胞株(RL95-2、HEC-1A、HHUA、HEC-1B及Ishikawa),子宫内膜上皮细胞hEEC。子宫内膜癌细胞株Ishikawa转染si-TFAP2A-AS1(si-TFAP2A-AS1组)、si-NC(si-NC组)、miR-9-5p mimics(miR-9-5p组)及miR-NC(miR-NC组);RL95-2细胞转染OE-TFAP2A-AS1(TFAP2A-AS1组)、Vector(Vector组)、sh-miR-9-5p(sh-miR-9-5p组)及sh-NC(sh-NC组)。CCK-8检测细胞增殖能力,Transwell检测细胞侵袭、迁移能力,双荧光素酶实验、pull down实验分析TFAP2A-AS1与miR-9-5p的靶向关系;miR-9-5p与ERK的靶向关系,实时荧光定量PCR(RT-qPCR)检测子宫内膜癌组织、癌旁组织、子宫内膜癌细胞及hEEC细胞TFAP2AAS1、miR-9-5p表达水平,Western blot检测细胞外调节蛋白激酶(ERK)、磷酸化ERK(p-ERK)水平。结果:子宫内膜癌组织中TFAP2A-AS1表达水平低于癌旁组织,miR-9-5p表达水平高于癌旁组织(P<0.05)。子宫内膜癌组织TFAP2A-AS1、miR-9-5p表达水平与分化程度、肿瘤直径、TNM分期及淋巴结转移有关。子宫内膜癌组织中TFAP2A-AS1、miR-9-5p表达水平呈负相关(r=-0.782,P=0.002)。与hEEC细胞比较,RL95-2、HEC-1A、HHUA、HEC-1B及Ishikawa细胞TFAP2A-AS1表达水平降低,miR-9-5p表达水平升高(P<0.05)。与si-NC组比较,si-TFAP2A-AS1组细胞48 h、72 h OD值,侵袭、迁移细胞数均升高(P<0.05);与Vector组比较,TFAP2A-AS1组细胞48 h、72 h OD值,侵袭、迁移细胞数均降低(P<0.05)。与miR-NC组比较,miR-9-5p组细胞48 h、72 h OD值,侵袭、迁移细胞数均升高(P<0.05);与sh-NC组比较,sh-miR-9-5p组细胞48 h、72 h OD值,侵袭、迁移细胞数均降低(P<0.05)。TFAP2A-AS1负性调控miR-9-5p、p-ERK表达水平,miR-9-5p可靶向调控ERK蛋白。结论:过表达TFAP2A-AS1通过靶向下调miR-9-5p,抑制ERK通路,最终抑制子宫内膜癌细胞恶性生物学行为。展开更多
Background:Our previous study found that mouse embryonic neural stem cell(NSC)-derived exosomes(EXOs)regulated NSC differentiation via the miR-9/Hes1 axis.However,the effects of EXOs on brain microvascular endothelial...Background:Our previous study found that mouse embryonic neural stem cell(NSC)-derived exosomes(EXOs)regulated NSC differentiation via the miR-9/Hes1 axis.However,the effects of EXOs on brain microvascular endothelial cell(BMEC)dysfunction via the miR-9/Hes1 axis remain unknown.Therefore,the current study aimed to determine the effects of EXOs on BMEC proliferation,migration,and death via the miR-9/Hes1 axis.Methods:Immunofluorescence,quantitative real-time polymerase chain reaction,cell counting kit-8 assay,wound healing assay,calcein-acetoxymethyl/propidium iodide staining,and hematoxylin and eosin staining were used to determine the role and mechanism of EXOs on BMECs.Results:EXOs promoted BMEC proliferation and migration and reduced cell death under hypoxic conditions.The overexpression of miR-9 promoted BMEC prolifera-tion and migration and reduced cell death under hypoxic conditions.Moreover,miR-9 downregulation inhibited BMEC proliferation and migration and also promoted cell death.Hes1 silencing ameliorated the effect of amtagomiR-9 on BMEC proliferation and migration and cell death.Hyperemic structures were observed in the regions of the hippocampus and cortex in hypoxia-induced mice.Meanwhile,EXO treatment improved cerebrovascular alterations.Conclusion:NSC-derived EXOs can promote BMEC proliferation and migra-tion and reduce cell death via the miR-9/Hes1 axis under hypoxic conditions.Therefore,EXO therapeutic strategies could be considered for hypoxia-induced vascular injury.展开更多
Objective:To investigate the possible mechanism of microRNA-9-5p(miR-9-5p)and Ras homologous gene family A(RHOA)in aluminum-induced cognitive dysfunction in rats.Methods:According to the principle of randomization,48 ...Objective:To investigate the possible mechanism of microRNA-9-5p(miR-9-5p)and Ras homologous gene family A(RHOA)in aluminum-induced cognitive dysfunction in rats.Methods:According to the principle of randomization,48 Wistar rats were randomly divided into four groups(n=12)of blank control,low dose,medium dose and high dose.The blank control group was gavaged daily saline,and the other three dose groups were given daily gavage AlCl3 aqueous solution at three doses of 25 mg/kg,50 mg/kg,and 100 mg/kg to create a rat model of cognitive impairment for three months.The water maze(MWM)positioning navigation experiment was used to record the time t(s),namely,the incubation period,on the platform of rats,and the incubation period of each group was used to determine whether the rats in the infected group had learning and memory impairment.Hematoxylin-eosin(HE)and Nissl stains observed the pathological changes of nerve cells in the hippocampus of the four groups.Western blot detected the protein expression levels of RHOA and cranial neurotrophic factor(BDNF)in fresh rat hippocampal tissues.RT-qPCR detected the mRNA expression of miR-9-5p,RHOA,and BDNF in rat hippocampal tissues.Results:The results of Morris water maze positioning navigation test showed that the incubation period of each group was calculated on the 1st,3rd and 5th days of the experiment,and the motor incubation period of the infected group was higher than that of the control group.The results of HE staining showed that the rat nerve cells in the control group were morphologically intact,the staining was clear,the nucleus was clearly visible,and the edge of the cell membrane was sharp.The rat neurons in the infected group were damaged to varying degrees,the nucleus gradually dissolved,the cytoplasmic staining became deeper,the edges of the cell membrane were blurred and disordered,and the cells were deformed and arranged disordered.The results of Nissl staining showed that the well-stained Nissl body particles were visible in the nerve cells of rats in the control group,and the dissipation of Nissl bodies in the nerve cells of the infected group was reduced,and the staining was shallow.The results of RT-qPCR showed that compared with the control group,the mRNA expression of miR-9-5p and BDNF was decreased in the infected group,and the mRNA expression of RHOA was increased(P<0.05 or P<0.001).The Western blot results showed that compared with the control group,the relative expression of BDNF in the three infected groups was decreased,and the relative expression of RHOA increased(P<0.05).Conclusion:In aluminum-induced cognitive impairment,miR-9-5p is downregulated and RHOA is upregulatd.展开更多
基金supported by the National Natural Science Foundation of China,Nos.82271327(to ZW),82072535(to ZW),81873768(to ZW),and 82001253(to TL).
文摘We previously showed that hydrogen sulfide(H2S)has a neuroprotective effect in the context of hypoxic ischemic brain injury in neonatal mice.However,the precise mechanism underlying the role of H2S in this situation remains unclear.In this study,we used a neonatal mouse model of hypoxic ischemic brain injury and a lipopolysaccharide-stimulated BV2 cell model and found that treatment with L-cysteine,a H2S precursor,attenuated the cerebral infarction and cerebral atrophy induced by hypoxia and ischemia and increased the expression of miR-9-5p and cystathionineβsynthase(a major H2S synthetase in the brain)in the prefrontal cortex.We also found that an miR-9-5p inhibitor blocked the expression of cystathionineβsynthase in the prefrontal cortex in mice with brain injury caused by hypoxia and ischemia.Furthermore,miR-9-5p overexpression increased cystathionine-β-synthase and H2S expression in the injured prefrontal cortex of mice with hypoxic ischemic brain injury.L-cysteine decreased the expression of CXCL11,an miR-9-5p target gene,in the prefrontal cortex of the mouse model and in lipopolysaccharide-stimulated BV-2 cells and increased the levels of proinflammatory cytokines BNIP3,FSTL1,SOCS2 and SOCS5,while treatment with an miR-9-5p inhibitor reversed these changes.These findings suggest that H2S can reduce neuroinflammation in a neonatal mouse model of hypoxic ischemic brain injury through regulating the miR-9-5p/CXCL11 axis and restoringβ-synthase expression,thereby playing a role in reducing neuroinflammation in hypoxic ischemic brain injury.
文摘目的:探讨长链非编码RNA TFAP2A-AS1对子宫内膜癌细胞增殖、侵袭和迁移的影响及机制。方法:选择50例子宫内膜癌组织和对应的癌旁组织。选取子宫内膜癌细胞株(RL95-2、HEC-1A、HHUA、HEC-1B及Ishikawa),子宫内膜上皮细胞hEEC。子宫内膜癌细胞株Ishikawa转染si-TFAP2A-AS1(si-TFAP2A-AS1组)、si-NC(si-NC组)、miR-9-5p mimics(miR-9-5p组)及miR-NC(miR-NC组);RL95-2细胞转染OE-TFAP2A-AS1(TFAP2A-AS1组)、Vector(Vector组)、sh-miR-9-5p(sh-miR-9-5p组)及sh-NC(sh-NC组)。CCK-8检测细胞增殖能力,Transwell检测细胞侵袭、迁移能力,双荧光素酶实验、pull down实验分析TFAP2A-AS1与miR-9-5p的靶向关系;miR-9-5p与ERK的靶向关系,实时荧光定量PCR(RT-qPCR)检测子宫内膜癌组织、癌旁组织、子宫内膜癌细胞及hEEC细胞TFAP2AAS1、miR-9-5p表达水平,Western blot检测细胞外调节蛋白激酶(ERK)、磷酸化ERK(p-ERK)水平。结果:子宫内膜癌组织中TFAP2A-AS1表达水平低于癌旁组织,miR-9-5p表达水平高于癌旁组织(P<0.05)。子宫内膜癌组织TFAP2A-AS1、miR-9-5p表达水平与分化程度、肿瘤直径、TNM分期及淋巴结转移有关。子宫内膜癌组织中TFAP2A-AS1、miR-9-5p表达水平呈负相关(r=-0.782,P=0.002)。与hEEC细胞比较,RL95-2、HEC-1A、HHUA、HEC-1B及Ishikawa细胞TFAP2A-AS1表达水平降低,miR-9-5p表达水平升高(P<0.05)。与si-NC组比较,si-TFAP2A-AS1组细胞48 h、72 h OD值,侵袭、迁移细胞数均升高(P<0.05);与Vector组比较,TFAP2A-AS1组细胞48 h、72 h OD值,侵袭、迁移细胞数均降低(P<0.05)。与miR-NC组比较,miR-9-5p组细胞48 h、72 h OD值,侵袭、迁移细胞数均升高(P<0.05);与sh-NC组比较,sh-miR-9-5p组细胞48 h、72 h OD值,侵袭、迁移细胞数均降低(P<0.05)。TFAP2A-AS1负性调控miR-9-5p、p-ERK表达水平,miR-9-5p可靶向调控ERK蛋白。结论:过表达TFAP2A-AS1通过靶向下调miR-9-5p,抑制ERK通路,最终抑制子宫内膜癌细胞恶性生物学行为。
基金Program of Natural Science Foundation of Shanghai,Grant/Award Number:21ZR1453800 and 22ZR1452400Program of National Natural Science Foundation of China,Grant/Award Number:82370057+3 种基金Fundamental Research Funds for the Central Universities,Grant/Award Number:22120220562Program of Shanghai Municipal Health Commission,Grant/Award Number:20204Y0384Program of National Key Research and Development Project of China,Grant/Award Number:2023YFC2509500。
文摘Background:Our previous study found that mouse embryonic neural stem cell(NSC)-derived exosomes(EXOs)regulated NSC differentiation via the miR-9/Hes1 axis.However,the effects of EXOs on brain microvascular endothelial cell(BMEC)dysfunction via the miR-9/Hes1 axis remain unknown.Therefore,the current study aimed to determine the effects of EXOs on BMEC proliferation,migration,and death via the miR-9/Hes1 axis.Methods:Immunofluorescence,quantitative real-time polymerase chain reaction,cell counting kit-8 assay,wound healing assay,calcein-acetoxymethyl/propidium iodide staining,and hematoxylin and eosin staining were used to determine the role and mechanism of EXOs on BMECs.Results:EXOs promoted BMEC proliferation and migration and reduced cell death under hypoxic conditions.The overexpression of miR-9 promoted BMEC prolifera-tion and migration and reduced cell death under hypoxic conditions.Moreover,miR-9 downregulation inhibited BMEC proliferation and migration and also promoted cell death.Hes1 silencing ameliorated the effect of amtagomiR-9 on BMEC proliferation and migration and cell death.Hyperemic structures were observed in the regions of the hippocampus and cortex in hypoxia-induced mice.Meanwhile,EXO treatment improved cerebrovascular alterations.Conclusion:NSC-derived EXOs can promote BMEC proliferation and migra-tion and reduce cell death via the miR-9/Hes1 axis under hypoxic conditions.Therefore,EXO therapeutic strategies could be considered for hypoxia-induced vascular injury.
基金National Natural Science Foundation Project of China(No.31560294)Guangxi Degree and Postgraduate Education Reform Project in 2021(No.JGY2021208)。
文摘Objective:To investigate the possible mechanism of microRNA-9-5p(miR-9-5p)and Ras homologous gene family A(RHOA)in aluminum-induced cognitive dysfunction in rats.Methods:According to the principle of randomization,48 Wistar rats were randomly divided into four groups(n=12)of blank control,low dose,medium dose and high dose.The blank control group was gavaged daily saline,and the other three dose groups were given daily gavage AlCl3 aqueous solution at three doses of 25 mg/kg,50 mg/kg,and 100 mg/kg to create a rat model of cognitive impairment for three months.The water maze(MWM)positioning navigation experiment was used to record the time t(s),namely,the incubation period,on the platform of rats,and the incubation period of each group was used to determine whether the rats in the infected group had learning and memory impairment.Hematoxylin-eosin(HE)and Nissl stains observed the pathological changes of nerve cells in the hippocampus of the four groups.Western blot detected the protein expression levels of RHOA and cranial neurotrophic factor(BDNF)in fresh rat hippocampal tissues.RT-qPCR detected the mRNA expression of miR-9-5p,RHOA,and BDNF in rat hippocampal tissues.Results:The results of Morris water maze positioning navigation test showed that the incubation period of each group was calculated on the 1st,3rd and 5th days of the experiment,and the motor incubation period of the infected group was higher than that of the control group.The results of HE staining showed that the rat nerve cells in the control group were morphologically intact,the staining was clear,the nucleus was clearly visible,and the edge of the cell membrane was sharp.The rat neurons in the infected group were damaged to varying degrees,the nucleus gradually dissolved,the cytoplasmic staining became deeper,the edges of the cell membrane were blurred and disordered,and the cells were deformed and arranged disordered.The results of Nissl staining showed that the well-stained Nissl body particles were visible in the nerve cells of rats in the control group,and the dissipation of Nissl bodies in the nerve cells of the infected group was reduced,and the staining was shallow.The results of RT-qPCR showed that compared with the control group,the mRNA expression of miR-9-5p and BDNF was decreased in the infected group,and the mRNA expression of RHOA was increased(P<0.05 or P<0.001).The Western blot results showed that compared with the control group,the relative expression of BDNF in the three infected groups was decreased,and the relative expression of RHOA increased(P<0.05).Conclusion:In aluminum-induced cognitive impairment,miR-9-5p is downregulated and RHOA is upregulatd.
