AIM: To investigate whether the regulation of aquaporin 3 (AQP3) and AQP9 induced by Auphen and dibutyryl cAMP (dbcAMP) inhibits hepatic tumorigenesis.METHODS: Expression of AQP3 and AQP9 was detected by Western blot,...AIM: To investigate whether the regulation of aquaporin 3 (AQP3) and AQP9 induced by Auphen and dibutyryl cAMP (dbcAMP) inhibits hepatic tumorigenesis.METHODS: Expression of AQP3 and AQP9 was detected by Western blot, immunohistochemistry (IHC), and RT-PCR in HCC samples and paired non-cancerous liver tissue samples from 30 hepatocellular carcinoma (HCC) patients. A xenograft tumor model was used in vivo. Nine nude mice were divided into control, Auphen-treated, and dbcAMP-treated groups (n = 3 for each group). AQP3 and AQP9 protein expression after induction of xenograft tumors was detected by IHC and mRNA by RT-PCR analysis. The terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling assay and histological evaluation were used to detect apoptosis of tumor cells, and the concentration of serum α-fetoprotein (AFP) was measured using RT-PCR and an ELISA kit.RESULTS: The volumes and weights of tumors decreased significantly in the Auphen- and dbcAMP-treated mice compared with the control mice (P < 0.01). The levels of AQP3 were significantly lower in the Auphen treatment group, and levels of AQP9 were significantly higher in thedbcAMP treatment mice than in the control mice (P < 0.01). The reduction of AQP3 by Auphen and increase of AQP9 by dbcAMP in nude mice suppressed tumor growth of HCC, which resulted in reduced AFP levels in serum and tissues, and apoptosis of tumor cells in the Auphen- and dbcAMP-treated mice, when compared with control mice (P < 0.01). Compared with para-carcinoma tissues, AQP3 expression increased in tumor tissues whereas the expression of AQP9 decreased. By correlating clinicopathological and expression levels, we demonstrated that the expression of AQP3 and AQP9 was correlated with clinical progression of HCC and disease outcomes.CONCLUSION: AQP3 increases in HCC while AQP9 decreases. Regulation of AQP3 and AQP9 expression by Auphen and dbcAMP inhibits the development and growth of HCC.展开更多
Objective:To analyze the structure of aquaporins-3(AQP-3) from Schistosoma japonicum(SJAQP-3) using bioinformalical methods,and to provid of references for vaccine targets research.Methods:Protparam,BepiPred,TMHMM Ser...Objective:To analyze the structure of aquaporins-3(AQP-3) from Schistosoma japonicum(SJAQP-3) using bioinformalical methods,and to provid of references for vaccine targets research.Methods:Protparam,BepiPred,TMHMM Server,MLRC,Geno3d,DNA star software packages were used to predict the physical and chemical properties,hydrophilicity plot, flexibility regions,antigenic index,surface probability plot,secondary structure,and tertiary structure of amino acid sequence of SJAQP-3.Results:SJAQP-3 had six transmembrane regions and two half-spanning helices that form a central channel.The half-spanning helices fold into the centre of the channel.Either of the half-spanning helix had a conserved motif of NPA common to all aquaporins.Predicted linear B-Cell epitopes were most likely at the N-terminal amino acid residues of Saa-7aa,59aa- 62aa,225aa-230aa,282aa -288aa,294aa -29Saa and 305aa -307aa area.59aa- 62aa,22Saa-230aa located outside the membrane,the others located inside the cell.Conclusions:SJAQP-3 is a integral membrane protein in Schistosoma japonicum tegument.There are six potential epitopes in SJ AQP-3.It might be a potential molecular target for the development of vaccines.展开更多
目的:采用洛哌丁胺灌胃建立便秘大鼠模型,观察大黄对便秘模型大鼠AQP3表达的影响。方法:健康Wistar大鼠18只,随机分为3组,空白组、模型组、大黄组。模型组及大黄组采用配制好的含洛哌丁胺(1.5 mg·kg^(-1)·d^(-1))混悬液2 m L...目的:采用洛哌丁胺灌胃建立便秘大鼠模型,观察大黄对便秘模型大鼠AQP3表达的影响。方法:健康Wistar大鼠18只,随机分为3组,空白组、模型组、大黄组。模型组及大黄组采用配制好的含洛哌丁胺(1.5 mg·kg^(-1)·d^(-1))混悬液2 m L灌胃7 d。模型建立后,大黄组以大黄(5 mg·kg^(-1))混悬液2 m L灌胃。检测结肠传输,采用RT-PCR、免疫组织化学法检测AQP3表达情况。结果:(1)造模后大鼠的体重增加、结肠存留粪便增多、粪便含水量降低、肠道传输时间延长(P<0.05)。(2)大黄干预组大鼠大便量、粪便含水量增加(P<0.05)。(3)大黄干预便秘大鼠,其结肠传输时间缩短,AQP3 mRNA及蛋白表达水平低于模型组(P<0.05)。结论:大黄能抑制AQP3在大鼠结肠黏膜层的表达,其表达降低可能与下调结肠上皮细胞质膜上功能性AQP3数量相关,从而增加粪便含水量。展开更多
基金Supported by Science and Technology Commission of Shanghai,No.13ZR1406700 and No.13DZ1930908
文摘AIM: To investigate whether the regulation of aquaporin 3 (AQP3) and AQP9 induced by Auphen and dibutyryl cAMP (dbcAMP) inhibits hepatic tumorigenesis.METHODS: Expression of AQP3 and AQP9 was detected by Western blot, immunohistochemistry (IHC), and RT-PCR in HCC samples and paired non-cancerous liver tissue samples from 30 hepatocellular carcinoma (HCC) patients. A xenograft tumor model was used in vivo. Nine nude mice were divided into control, Auphen-treated, and dbcAMP-treated groups (n = 3 for each group). AQP3 and AQP9 protein expression after induction of xenograft tumors was detected by IHC and mRNA by RT-PCR analysis. The terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling assay and histological evaluation were used to detect apoptosis of tumor cells, and the concentration of serum α-fetoprotein (AFP) was measured using RT-PCR and an ELISA kit.RESULTS: The volumes and weights of tumors decreased significantly in the Auphen- and dbcAMP-treated mice compared with the control mice (P < 0.01). The levels of AQP3 were significantly lower in the Auphen treatment group, and levels of AQP9 were significantly higher in thedbcAMP treatment mice than in the control mice (P < 0.01). The reduction of AQP3 by Auphen and increase of AQP9 by dbcAMP in nude mice suppressed tumor growth of HCC, which resulted in reduced AFP levels in serum and tissues, and apoptosis of tumor cells in the Auphen- and dbcAMP-treated mice, when compared with control mice (P < 0.01). Compared with para-carcinoma tissues, AQP3 expression increased in tumor tissues whereas the expression of AQP9 decreased. By correlating clinicopathological and expression levels, we demonstrated that the expression of AQP3 and AQP9 was correlated with clinical progression of HCC and disease outcomes.CONCLUSION: AQP3 increases in HCC while AQP9 decreases. Regulation of AQP3 and AQP9 expression by Auphen and dbcAMP inhibits the development and growth of HCC.
文摘Objective:To analyze the structure of aquaporins-3(AQP-3) from Schistosoma japonicum(SJAQP-3) using bioinformalical methods,and to provid of references for vaccine targets research.Methods:Protparam,BepiPred,TMHMM Server,MLRC,Geno3d,DNA star software packages were used to predict the physical and chemical properties,hydrophilicity plot, flexibility regions,antigenic index,surface probability plot,secondary structure,and tertiary structure of amino acid sequence of SJAQP-3.Results:SJAQP-3 had six transmembrane regions and two half-spanning helices that form a central channel.The half-spanning helices fold into the centre of the channel.Either of the half-spanning helix had a conserved motif of NPA common to all aquaporins.Predicted linear B-Cell epitopes were most likely at the N-terminal amino acid residues of Saa-7aa,59aa- 62aa,225aa-230aa,282aa -288aa,294aa -29Saa and 305aa -307aa area.59aa- 62aa,22Saa-230aa located outside the membrane,the others located inside the cell.Conclusions:SJAQP-3 is a integral membrane protein in Schistosoma japonicum tegument.There are six potential epitopes in SJ AQP-3.It might be a potential molecular target for the development of vaccines.
文摘目的:采用洛哌丁胺灌胃建立便秘大鼠模型,观察大黄对便秘模型大鼠AQP3表达的影响。方法:健康Wistar大鼠18只,随机分为3组,空白组、模型组、大黄组。模型组及大黄组采用配制好的含洛哌丁胺(1.5 mg·kg^(-1)·d^(-1))混悬液2 m L灌胃7 d。模型建立后,大黄组以大黄(5 mg·kg^(-1))混悬液2 m L灌胃。检测结肠传输,采用RT-PCR、免疫组织化学法检测AQP3表达情况。结果:(1)造模后大鼠的体重增加、结肠存留粪便增多、粪便含水量降低、肠道传输时间延长(P<0.05)。(2)大黄干预组大鼠大便量、粪便含水量增加(P<0.05)。(3)大黄干预便秘大鼠,其结肠传输时间缩短,AQP3 mRNA及蛋白表达水平低于模型组(P<0.05)。结论:大黄能抑制AQP3在大鼠结肠黏膜层的表达,其表达降低可能与下调结肠上皮细胞质膜上功能性AQP3数量相关,从而增加粪便含水量。
