Peroxiredoxin 1(PRDX1)participates in tumor cell proliferation,apoptosis,migration,invasion,and the epithelial-to-mesenchymal transition(EMT).This study aimed to investigate the effect of PRDX1 on the EMT of airway ep...Peroxiredoxin 1(PRDX1)participates in tumor cell proliferation,apoptosis,migration,invasion,and the epithelial-to-mesenchymal transition(EMT).This study aimed to investigate the effect of PRDX1 on the EMT of airway epithelial cells stimulated with lipopolysaccharide(LPS)and transforming growth factor-beta 1(TGF-β1).PRDX1 overexpression significantly increased the proliferation and migration of human bronchial epithelial(BEAS-2B)cells,reduced cell apoptosis(p<0.01),and induced EMT and collagen deposition by upregulating the expression of the matrix metallopeptidase(MMP)2,MMP9,α-smooth muscle actin(α-SMA),N-cadherin,vimentin and twist proteins and inhibiting E-cadherin expression(p<0.05).PRDX1 overexpression promoted TGF-β1-mediated inhibition of cell proliferation and migration and significantly enhanced the TGF-β1-induced EMT and collagen synthesis(p<0.05).Knockdown of PRDX1 inhibited cell proliferation,migration,EMT,and collagen synthesis(p<0.01),reversed LPS-mediated inhibition of cell proliferation and migration,and significantly suppressed LPS-induced EMT and collagen synthesis(p<0.01).The result indicating that PRDX1 may be involved in LPS/TGF-1-induced EMT and collagen synthesis in human bronchial epithelial cells.展开更多
AIM: To investigate the expression characteristics of peroxiredoxin 1(PRDX1) m RNA and protein in liver cancer cell lines and tissues.METHODS: The RNA sequencing data from 374 patients with liver cancer were obtained ...AIM: To investigate the expression characteristics of peroxiredoxin 1(PRDX1) m RNA and protein in liver cancer cell lines and tissues.METHODS: The RNA sequencing data from 374 patients with liver cancer were obtained from The Cancer Genome Atlas. The expression and clinical characteristics of PRDX1 m RNA were analyzed in this dataset. The Kaplan-Meier and Cox regression survival analysis was performed to determine the relationship between PRDX1 levels and patient survival. Subcellular fractionation and Western blotting were used to demonstrate the expression of PRDX1 protein in six liver cancer cell lines and 29 paired fresh tissue specimens. After bioinformatics prediction,a putative posttranslational modification form of PRDX1 was observed using immunofluorescence under confocal microscopy and immunoprecipitation analysis in liver cancer cells.RESULTS: The m RNA of PRDX1 gene was upregulated about 1.3-fold in tumor tissue compared with the adjacent non-tumor control(P = 0.005). Its abundance was significantly higher in men than women(P < 0.001). High levels of PRDX1 m RNA were associated with a shorter overall survival time(P =0.04) but not with recurrence-free survival. The Cox regression analysis demonstrated that patients with high PRDX1 m RNA showed about 1.9-fold increase of risk for death(P = 0.03). In liver cancer cells,PRDX1 protein was strongly expressed with multiple different bands. PRDX1 in the cytosol fraction existed near the theoretical molecular weight,whereas two higher molecular weight bands were present in the membrane/organelle and nuclear fractions. Importantly,the theoretical PRDX1 band was increased,whereas the high molecular weight form was decreased in tumor tissues. Subsequent experiments revealed that the high molecular weight bands of PRDX1 might result from the post-translational modification by small ubiquitin-like modifier-1(SUMO1).CONCLUSION: PRDX1 was overexpressed in the tumor tissues of liver cancer and served as an independent poor prognostic factor for overall survival. PRDX1 can be modified by SUMO to play specific roles in hepatocarcinogenesis.展开更多
目的探讨细胞外信号调节激酶1/2(ERK1/2)在转化生长因子-β1(TGF-β1)诱导的肺成纤维细胞合成Ⅰ、Ⅲ型胶原蛋白中的作用,及新型过氧化物酶Peroxiredoxin-1(Prx-1)对该作用的影响。方法体外培养肺成纤维细胞随机分为4组:对照组(0.4%血清)...目的探讨细胞外信号调节激酶1/2(ERK1/2)在转化生长因子-β1(TGF-β1)诱导的肺成纤维细胞合成Ⅰ、Ⅲ型胶原蛋白中的作用,及新型过氧化物酶Peroxiredoxin-1(Prx-1)对该作用的影响。方法体外培养肺成纤维细胞随机分为4组:对照组(0.4%血清)、TGF-β1组(5μg/L)、阴性转染组(TGF-β1+阴性对照si RNA)和Prx-1 si RNA转染组(TGF-β1+Prx-1 si RNA)。采用脂质体转染法转染si RNA,实时定量逆转录-聚合酶链反应(RT-PCR)检测转染后Prx-1 m RNA表达;Western blot检测Ⅰ和Ⅲ型胶原蛋白、ERK1/2及Prx-1表达;2,7-二氯荧光素二乙酸(DCFH-DA)检测活性氧(ROS)水平。结果 Prx-1 si RNA转染肺成纤维细胞后,Prx-1 m RNA表达明显降低,最大抑制率为92%。与对照组比较,TGF-β1组的Ⅰ和Ⅲ型胶原蛋白、ROS、磷酸化ERK1/2(p-ERK1/2)及Prx-1蛋白的表达水平均明显提高。与TGF-β1组比较,阴性转染组中的上述观察指标无明显变化,但Prx-1转染组的Ⅰ和Ⅲ型胶原蛋白、ROS、p-ERK1/2水平进一步提高,而Prx-1蛋白的表达被抑制。结论 TGF-β1能够诱导肺成纤维细胞生成ROS,并促进ERK1/2通路的激活,导致Ⅰ、Ⅲ型胶原蛋白合成增加,而Prx-1 si RNA可通过提高ROS水平进一步促进TGF-β1该作用。展开更多
目的:探究阿魏酸钠(SF)通过miR-216b-3p/Nrf2通路对缺氧缺血性脑病(HIE)胚胎大鼠大脑的干预作用以及减轻氧化应激损伤的作用机制。方法:将成年雌性SD大鼠和雄鼠,按照3∶1比例合笼获得怀孕的雌鼠。然后将孕鼠分为假手术组(sham)、缺氧缺...目的:探究阿魏酸钠(SF)通过miR-216b-3p/Nrf2通路对缺氧缺血性脑病(HIE)胚胎大鼠大脑的干预作用以及减轻氧化应激损伤的作用机制。方法:将成年雌性SD大鼠和雄鼠,按照3∶1比例合笼获得怀孕的雌鼠。然后将孕鼠分为假手术组(sham)、缺氧缺血性脑病模型组(HIE)、SF低剂量组(HIE+SF-L)和SF高剂量组(HIE+SF-H)。通过无创止血钳夹闭子宫两侧动脉和卵巢血管法制备胚胎大鼠HIE模型。SF治疗组腹膜腔注射SF。采用HE染色观察胚胎大鼠大脑皮质的病理变化;免疫荧光观察核因子红细胞系2相关因子2(Nrf2)、过氧化还原酶1(PRDX1)的表达情况;Western Blot检测胚胎大鼠脑组织中Nrf2和PRDX1蛋白的表达;real time RT-PCR检测miR-216b-3p的表达以及Nrf2和PRDX1的mRNA表达;WST-8法和TBA法检测脑组织中的超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量。结果:与sham组对比,HIE组胚胎大鼠的大脑损伤加重,病理改变明显;HIE组中Nrf2蛋白表达和mRNA水平降低(P<0.05),PRDX1的蛋白水平和mRNA水平显著上调(P<0.05),miR-216b-3p表达水平显著升高(P<0.05);并且Nrf2的平均荧光强度显著降低(P<0.05),PRDX1的平均荧光强度显著增加(P<0.05);SOD活性显著下调,MDA含量显著增加(P<0.05)。与HIE组对比,各剂量SF组的大脑皮质病理结构明显改善,脑损伤减轻;Nrf2和PRDX1的蛋白表达、mRNA水平以及平均荧光强度均显著上升(P<0.05);miR-216b-3p表达水平均显著下调,以SF高剂量组下调最为显著(P<0.05);并且SOD活性显著上调,MDA含量显著下调(P<0.05)。结论:SF通过miR-216b-3p/Nrf2信号通路在HIE的发生发展过程中发挥重要作用,并减轻胚胎大鼠受到的氧化应激损伤。展开更多
基金The study was supported by the Fujian Provincial Science and Technology Department of the Project Fund under Grant(Grant No.2015J01573)the Medical Innovation Projects of Fujian Province’s Health and Scientific Research Talent Training Project under Grant(Grant No.2019-CXB-25).
文摘Peroxiredoxin 1(PRDX1)participates in tumor cell proliferation,apoptosis,migration,invasion,and the epithelial-to-mesenchymal transition(EMT).This study aimed to investigate the effect of PRDX1 on the EMT of airway epithelial cells stimulated with lipopolysaccharide(LPS)and transforming growth factor-beta 1(TGF-β1).PRDX1 overexpression significantly increased the proliferation and migration of human bronchial epithelial(BEAS-2B)cells,reduced cell apoptosis(p<0.01),and induced EMT and collagen deposition by upregulating the expression of the matrix metallopeptidase(MMP)2,MMP9,α-smooth muscle actin(α-SMA),N-cadherin,vimentin and twist proteins and inhibiting E-cadherin expression(p<0.05).PRDX1 overexpression promoted TGF-β1-mediated inhibition of cell proliferation and migration and significantly enhanced the TGF-β1-induced EMT and collagen synthesis(p<0.05).Knockdown of PRDX1 inhibited cell proliferation,migration,EMT,and collagen synthesis(p<0.01),reversed LPS-mediated inhibition of cell proliferation and migration,and significantly suppressed LPS-induced EMT and collagen synthesis(p<0.01).The result indicating that PRDX1 may be involved in LPS/TGF-1-induced EMT and collagen synthesis in human bronchial epithelial cells.
基金Supported by State Key Project for Infectious Diseases,No.2013ZX10002009 and No.2012ZX10002-017State Key Project for Basic Research,No.2014CBA02001 and No.2014CBA02002+1 种基金National High-tech R and D Program,No.2012AA020206Natural Science Foundation of China,No.81071789 and No.81321091
文摘AIM: To investigate the expression characteristics of peroxiredoxin 1(PRDX1) m RNA and protein in liver cancer cell lines and tissues.METHODS: The RNA sequencing data from 374 patients with liver cancer were obtained from The Cancer Genome Atlas. The expression and clinical characteristics of PRDX1 m RNA were analyzed in this dataset. The Kaplan-Meier and Cox regression survival analysis was performed to determine the relationship between PRDX1 levels and patient survival. Subcellular fractionation and Western blotting were used to demonstrate the expression of PRDX1 protein in six liver cancer cell lines and 29 paired fresh tissue specimens. After bioinformatics prediction,a putative posttranslational modification form of PRDX1 was observed using immunofluorescence under confocal microscopy and immunoprecipitation analysis in liver cancer cells.RESULTS: The m RNA of PRDX1 gene was upregulated about 1.3-fold in tumor tissue compared with the adjacent non-tumor control(P = 0.005). Its abundance was significantly higher in men than women(P < 0.001). High levels of PRDX1 m RNA were associated with a shorter overall survival time(P =0.04) but not with recurrence-free survival. The Cox regression analysis demonstrated that patients with high PRDX1 m RNA showed about 1.9-fold increase of risk for death(P = 0.03). In liver cancer cells,PRDX1 protein was strongly expressed with multiple different bands. PRDX1 in the cytosol fraction existed near the theoretical molecular weight,whereas two higher molecular weight bands were present in the membrane/organelle and nuclear fractions. Importantly,the theoretical PRDX1 band was increased,whereas the high molecular weight form was decreased in tumor tissues. Subsequent experiments revealed that the high molecular weight bands of PRDX1 might result from the post-translational modification by small ubiquitin-like modifier-1(SUMO1).CONCLUSION: PRDX1 was overexpressed in the tumor tissues of liver cancer and served as an independent poor prognostic factor for overall survival. PRDX1 can be modified by SUMO to play specific roles in hepatocarcinogenesis.
文摘目的探讨细胞外信号调节激酶1/2(ERK1/2)在转化生长因子-β1(TGF-β1)诱导的肺成纤维细胞合成Ⅰ、Ⅲ型胶原蛋白中的作用,及新型过氧化物酶Peroxiredoxin-1(Prx-1)对该作用的影响。方法体外培养肺成纤维细胞随机分为4组:对照组(0.4%血清)、TGF-β1组(5μg/L)、阴性转染组(TGF-β1+阴性对照si RNA)和Prx-1 si RNA转染组(TGF-β1+Prx-1 si RNA)。采用脂质体转染法转染si RNA,实时定量逆转录-聚合酶链反应(RT-PCR)检测转染后Prx-1 m RNA表达;Western blot检测Ⅰ和Ⅲ型胶原蛋白、ERK1/2及Prx-1表达;2,7-二氯荧光素二乙酸(DCFH-DA)检测活性氧(ROS)水平。结果 Prx-1 si RNA转染肺成纤维细胞后,Prx-1 m RNA表达明显降低,最大抑制率为92%。与对照组比较,TGF-β1组的Ⅰ和Ⅲ型胶原蛋白、ROS、磷酸化ERK1/2(p-ERK1/2)及Prx-1蛋白的表达水平均明显提高。与TGF-β1组比较,阴性转染组中的上述观察指标无明显变化,但Prx-1转染组的Ⅰ和Ⅲ型胶原蛋白、ROS、p-ERK1/2水平进一步提高,而Prx-1蛋白的表达被抑制。结论 TGF-β1能够诱导肺成纤维细胞生成ROS,并促进ERK1/2通路的激活,导致Ⅰ、Ⅲ型胶原蛋白合成增加,而Prx-1 si RNA可通过提高ROS水平进一步促进TGF-β1该作用。
文摘目的:探究阿魏酸钠(SF)通过miR-216b-3p/Nrf2通路对缺氧缺血性脑病(HIE)胚胎大鼠大脑的干预作用以及减轻氧化应激损伤的作用机制。方法:将成年雌性SD大鼠和雄鼠,按照3∶1比例合笼获得怀孕的雌鼠。然后将孕鼠分为假手术组(sham)、缺氧缺血性脑病模型组(HIE)、SF低剂量组(HIE+SF-L)和SF高剂量组(HIE+SF-H)。通过无创止血钳夹闭子宫两侧动脉和卵巢血管法制备胚胎大鼠HIE模型。SF治疗组腹膜腔注射SF。采用HE染色观察胚胎大鼠大脑皮质的病理变化;免疫荧光观察核因子红细胞系2相关因子2(Nrf2)、过氧化还原酶1(PRDX1)的表达情况;Western Blot检测胚胎大鼠脑组织中Nrf2和PRDX1蛋白的表达;real time RT-PCR检测miR-216b-3p的表达以及Nrf2和PRDX1的mRNA表达;WST-8法和TBA法检测脑组织中的超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量。结果:与sham组对比,HIE组胚胎大鼠的大脑损伤加重,病理改变明显;HIE组中Nrf2蛋白表达和mRNA水平降低(P<0.05),PRDX1的蛋白水平和mRNA水平显著上调(P<0.05),miR-216b-3p表达水平显著升高(P<0.05);并且Nrf2的平均荧光强度显著降低(P<0.05),PRDX1的平均荧光强度显著增加(P<0.05);SOD活性显著下调,MDA含量显著增加(P<0.05)。与HIE组对比,各剂量SF组的大脑皮质病理结构明显改善,脑损伤减轻;Nrf2和PRDX1的蛋白表达、mRNA水平以及平均荧光强度均显著上升(P<0.05);miR-216b-3p表达水平均显著下调,以SF高剂量组下调最为显著(P<0.05);并且SOD活性显著上调,MDA含量显著下调(P<0.05)。结论:SF通过miR-216b-3p/Nrf2信号通路在HIE的发生发展过程中发挥重要作用,并减轻胚胎大鼠受到的氧化应激损伤。
