AIM:To explore the protective effect and the relevant mechanisms of Fufang Biejia Ruangan Pills(FFBJRGP)on hepatic fibrosis in vivo and in vitro.METHODS:Hepatic fibrosis was induced by carbon tetrachloride composite f...AIM:To explore the protective effect and the relevant mechanisms of Fufang Biejia Ruangan Pills(FFBJRGP)on hepatic fibrosis in vivo and in vitro.METHODS:Hepatic fibrosis was induced by carbon tetrachloride composite factors.Adult Wistar rats were randomly divided into four groups:normal control group;hepatic fibrosis model group;FFBJRGP-treated group at a daily dose of 0.55 g/kg;and colchicinetreated group at a daily dose of 0.1 g/kg.The effects of FFBJRGP on liver function,serum levels of hyaluronic acid(HA),typeⅣcollagen(CⅣ),typeⅢprocollagen(PCⅢ),laminin(LN),histopathology,and expression of transforming growth factor(TGF-β1)and Smad3 in hepatic fibrosis were evaluated in vivo.The effects of FFBJRGP on survival rate,hydroxyproline content and cell cycle distribution were further detected in vitro.RESULTS:Compared with the hepatic fibrosis model group,rats treated with FFBJRGP showed a reduction in hepatic collagen deposition and improvement in hepatic lesions.Compared with those of the model group,the activities of alanine aminotransferase(62.0±23.7 U/L)and aspartate aminotransferase(98.8±40.0 U/L)in the FFBJRGP-treated group were decreased(50.02±3.7 U/L and 57.2±30.0 U/L,respectively,P<0.01).Compared with those in the model group,the levels of PCⅢ(35.73±17.90 g/mL),HA(563.82±335.54 ng/mL),LN(89.57±7.59 ng/mL)and CⅣ(29.20±6.17ng/mL)were decreased to 30.18±9.41,456.18±410.83,85.46±7.51 and 28.02±9.45 ng/mL,respectively.Reverse-transcriptase polymerase chain reaction and Western blotting also revealed that expression of TGF-β1 and Smad3 were down-regulated in vivo.Cell proliferation was inhibited,the level of hydroxyproline was decreased compared with the control group(P<0.01),and the cell cycle was redistributed when exposed to FFBJRGP in vitro.CONCLUSION:FFBJRGP inhibits hepatic fibrosis in vivo and in vitro,which is probably associated with downregulation of fibrogenic signal transduction of the TGF-β-Smad pathway.展开更多
Pancreatitis is inflammation of pancreas and caused by a number of factors including pancreatic duct obstruction, alcoholism, and mutation in the cationic trypsinogen gene. Pancreatitis is represented as acute pancrea...Pancreatitis is inflammation of pancreas and caused by a number of factors including pancreatic duct obstruction, alcoholism, and mutation in the cationic trypsinogen gene. Pancreatitis is represented as acute pancreatitis with acute inflammatory responses and; chronic pan-creatitis characterized by marked stroma formation with a high number of infiltrating granulocytes(such as neutrophils, eosinophils), monocytes, macrophages and pancreatic stellate cells(PSCs). These inflammatory cells are known to play a central role in initiating and promoting inflammation including pancreatic fibrosis, i.e., a major risk factor for pancreatic cancer. A number of inflammatory cytokines are known to involve in pro-moting pancreatic pathogenesis that lead pancreatic fibrosis. Pancreatic fibrosis is a dynamic phenomenon that requires an intricate network of several autocrine and paracrine signaling pathways. In this review, we have provided the details of various cytokines and molecular mechanistic pathways(i.e., Transforming growth factor-β/SMAD, mitogen--activated protein kinases, Rho kinase, Janus kinase/signal transducers and activators, and phosphatidylinositol 3 kinase) that have a critical role in the activation of PSCs to promote chronic pancreatitis and trigger the phenomenon of pancreatic fibrogenesis. In this review of literature, we discuss the involvement of several pro-inflammatory and anti-inflammatory cytokines, such as in interleukin(IL)-1, IL-1β, IL-6, IL--8 IL-10, IL-18, IL--33 and tumor necrosis factor-α, in the pathogenesis of disease. Our review also highlights the significance of several experimental animal models that have an important role in dissecting the mechanistic pathways operating in the development of chronic pancreatitis, including pancreatic fibrosis. Additionally, we provided several intermediary molecules that are involved in major signaling pathways that might provide target molecules for future therapeutic treatment strategies for pancreatic pathogenesis.展开更多
Background Hepatic fibrosis is the key stage of the pathological progress from hepatic injury to cirrhosis. Ursodeoxycholic acid （UDCA） has been known as having significant clinical therapeutic effects on chronic li...Background Hepatic fibrosis is the key stage of the pathological progress from hepatic injury to cirrhosis. Ursodeoxycholic acid （UDCA） has been known as having significant clinical therapeutic effects on chronic liver diseases. Our research aimed to study the effect of UDCA on the signaling pathway of transforming growth factor beta1 （TGFβ1）/Smad and discuss its possible molecular mechanisms of inhibiting hepatic fibrosis. Methods Rat hepatic stellate cells were cultured in vitro and randomly assigned to 4 groups. Group A was control group with only DMEM culture medium applied, and groups B, C, D were experimental groups, with different doses of UDCA （1.0 mmol/L, 0.5 mmol/L and 0.25 mmol/L respectively） added into their DMEM culture medium for further culture of 24 hours and 48 hours. The protein expressions of TGFβ1, TGF type 1 receptor, Smad3, Smad4 and Smad7 were measured by Western blotting, as well as the expressions of TGFβ1, Smad3, Smad7 and cAMP response element （CREB） binding protein （CBP） mRNA by real-time PCR. SPSS 11.5 statistical package was adopted for data analyses. Results Compared with control group, the mRNA expressions of TGFβ1 in the high and middle UDCA dose groups for 24 hours and 48 hours significantly decreased （P 〈0.05）, the protein expressions of TGFβ1 in the two above groups for 48 hours and in the high dose group for 24 hours significantly decreased （P 〈0.05）. The protein and mRNA expressions of Smad3 in each UDCA dose group for 24 hours and 48 hours significantly decreased, with significant difference among different UDCA dose groups and between that of 24 hours and 48 hours observed （P 〈0.05）. The protein and mRNA expressions of Smad7 in the high and middle UDCA dose groups for 24 hours and 48 hours significantly increased. The CBP mRNA expression in each UDCA dose group for 24 hours and 48 hours significantly decreased （P 〈0.05）, with significant difference among different UDCA dose groups observed （P 〈0.05）. Conclusion UDCA co展开更多
To investigate whether microRNA (miR)-34a mediates oxaliplatin (OXA) resistance of colorectal cancer (CRC) cells by inhibiting macroautophagy via the transforming growth factor (TGF)-β/Smad4 pathway.METHODSmiR-34a ex...To investigate whether microRNA (miR)-34a mediates oxaliplatin (OXA) resistance of colorectal cancer (CRC) cells by inhibiting macroautophagy via the transforming growth factor (TGF)-β/Smad4 pathway.METHODSmiR-34a expression levels were detected in CRC tissues and CRC cell lines by quantitative real-time polymerase chain reaction. Computational search, functional luciferase assay and western blotting were used to demonstrate the downstream target of miR-34a in CRC cells. Cell viability was measured with Cell Counting Kit-8. Apoptosis and macroautophagy of CRC cells were analyzed by flow cytometry and transmission electron microscopy, and expression of beclin I and LC3-II was detected by western blotting.RESULTSExpression of miR-34a was significantly reduced while expression of TGF-β and Smad4 was increased in CRC patients treated with OXA-based chemotherapy. OXA treatment also resulted in decreased miR-34a levels and increased TGF-β and Smad4 levels in both parental cells and the OXA-resistant CRC cells. Activation of macroautophagy contributed to OXA resistance in CRC cells. Expression levels of Smad4 and miR-34a in CRC patients had a significant inverse correlation and overexpressing miR-34a inhibited macroautophagy activation by directly targeting Smad4 through the TGF-β/Smad4 pathway. OXA-induced downregulation of miR-34a and increased drug resistance by activating macroautophagy in CRC cells.CONCLUSIONmiR-34a mediates OXA resistance of CRC by inhibiting macroautophagy via the TGF-β/Smad4 pathway.展开更多
AIM:To explore the anti-fibrotic effect of Haobie Yangyin Ruanjian Decoction(HYRD)on CCl4-induced hepatic fibrosis in rats and its modulation on the transforming growth factor(TGF)β-Smad signaling pathway.METHODS:Fif...AIM:To explore the anti-fibrotic effect of Haobie Yangyin Ruanjian Decoction(HYRD)on CCl4-induced hepatic fibrosis in rats and its modulation on the transforming growth factor(TGF)β-Smad signaling pathway.METHODS:Fifty-six healthy Wistar rats were randomly divided into five groups:normal control group(n=6),CCl4-induced hepatic fibrosis group(n=14) and three treatment groups(the treated rats received HYRD via oral administration at daily dosages of 8.2,2.5 and 0.82 g/kg,respectively)of HYRD(n=12,respectively).Experimental hepatic fibrosis was induced by subcutaneous injection of carbon tetrachloride solution(CCl4 dissolved in peanut oil,4:6,V/V)with 0.5 mL/100 g body weight for the first time,and then 0.3 mL/100 g body weight twice a week for 8 wk.In the former 2 wk,rats were raised by feedstuffⅠ(80% corn meal,20%lard,0.5%cholesterol).After 2 wk,they were raised by feedstuffⅡ(corn meal and 0.5% cholesterol).Except for the control group,30%alcohol solution was given orally to each rat every other day from the beginning,1 mL for each rat.Liver function parameters and hepatic hydroxyproline content were detected by chromatometry.Serum levels of hyaluronic acid(HA),typeⅣcollagen(CIV),typeⅢprecollagen(PCⅢ)and laminin(LN)were assayed with radioimmunoassay.Deposition of collagen was observed with hematoxylin-eosin staining and collagen staining.Gene expression of TGFβ1 and Smad3 were detected with real-time reverse transcriptase-polymerase chain reaction and Western blotting,respectively.RESULTS:The serum levels of alanine transaminase and aspartate transaminase were increased in the model group compared with the control group(P<0.01),and they were decreased in the three treatment groups compared with the model group.The serum levels of total protein and albumin were decreased in the model group and increased in the three treatment groups.The hepatic hydroxyproline content and serum levels of PCⅢ,HA,LN and CIV were markedly increased in the model group compared with the control group,and decreased in the tr展开更多
基金Supported by The Major Project of Applied Basic Research Plan of the Scientific and Technological Department of TianjinChinaNo.06YFJZJC 02900
文摘AIM:To explore the protective effect and the relevant mechanisms of Fufang Biejia Ruangan Pills(FFBJRGP)on hepatic fibrosis in vivo and in vitro.METHODS:Hepatic fibrosis was induced by carbon tetrachloride composite factors.Adult Wistar rats were randomly divided into four groups:normal control group;hepatic fibrosis model group;FFBJRGP-treated group at a daily dose of 0.55 g/kg;and colchicinetreated group at a daily dose of 0.1 g/kg.The effects of FFBJRGP on liver function,serum levels of hyaluronic acid(HA),typeⅣcollagen(CⅣ),typeⅢprocollagen(PCⅢ),laminin(LN),histopathology,and expression of transforming growth factor(TGF-β1)and Smad3 in hepatic fibrosis were evaluated in vivo.The effects of FFBJRGP on survival rate,hydroxyproline content and cell cycle distribution were further detected in vitro.RESULTS:Compared with the hepatic fibrosis model group,rats treated with FFBJRGP showed a reduction in hepatic collagen deposition and improvement in hepatic lesions.Compared with those of the model group,the activities of alanine aminotransferase(62.0±23.7 U/L)and aspartate aminotransferase(98.8±40.0 U/L)in the FFBJRGP-treated group were decreased(50.02±3.7 U/L and 57.2±30.0 U/L,respectively,P<0.01).Compared with those in the model group,the levels of PCⅢ(35.73±17.90 g/mL),HA(563.82±335.54 ng/mL),LN(89.57±7.59 ng/mL)and CⅣ(29.20±6.17ng/mL)were decreased to 30.18±9.41,456.18±410.83,85.46±7.51 and 28.02±9.45 ng/mL,respectively.Reverse-transcriptase polymerase chain reaction and Western blotting also revealed that expression of TGF-β1 and Smad3 were down-regulated in vivo.Cell proliferation was inhibited,the level of hydroxyproline was decreased compared with the control group(P<0.01),and the cell cycle was redistributed when exposed to FFBJRGP in vitro.CONCLUSION:FFBJRGP inhibits hepatic fibrosis in vivo and in vitro,which is probably associated with downregulation of fibrogenic signal transduction of the TGF-β-Smad pathway.
基金Supported by National Institutes of Health,Nos.R01 DK067255 and R01 AI080581
文摘Pancreatitis is inflammation of pancreas and caused by a number of factors including pancreatic duct obstruction, alcoholism, and mutation in the cationic trypsinogen gene. Pancreatitis is represented as acute pancreatitis with acute inflammatory responses and; chronic pan-creatitis characterized by marked stroma formation with a high number of infiltrating granulocytes(such as neutrophils, eosinophils), monocytes, macrophages and pancreatic stellate cells(PSCs). These inflammatory cells are known to play a central role in initiating and promoting inflammation including pancreatic fibrosis, i.e., a major risk factor for pancreatic cancer. A number of inflammatory cytokines are known to involve in pro-moting pancreatic pathogenesis that lead pancreatic fibrosis. Pancreatic fibrosis is a dynamic phenomenon that requires an intricate network of several autocrine and paracrine signaling pathways. In this review, we have provided the details of various cytokines and molecular mechanistic pathways(i.e., Transforming growth factor-β/SMAD, mitogen--activated protein kinases, Rho kinase, Janus kinase/signal transducers and activators, and phosphatidylinositol 3 kinase) that have a critical role in the activation of PSCs to promote chronic pancreatitis and trigger the phenomenon of pancreatic fibrogenesis. In this review of literature, we discuss the involvement of several pro-inflammatory and anti-inflammatory cytokines, such as in interleukin(IL)-1, IL-1β, IL-6, IL--8 IL-10, IL-18, IL--33 and tumor necrosis factor-α, in the pathogenesis of disease. Our review also highlights the significance of several experimental animal models that have an important role in dissecting the mechanistic pathways operating in the development of chronic pancreatitis, including pancreatic fibrosis. Additionally, we provided several intermediary molecules that are involved in major signaling pathways that might provide target molecules for future therapeutic treatment strategies for pancreatic pathogenesis.
文摘Background Hepatic fibrosis is the key stage of the pathological progress from hepatic injury to cirrhosis. Ursodeoxycholic acid （UDCA） has been known as having significant clinical therapeutic effects on chronic liver diseases. Our research aimed to study the effect of UDCA on the signaling pathway of transforming growth factor beta1 （TGFβ1）/Smad and discuss its possible molecular mechanisms of inhibiting hepatic fibrosis. Methods Rat hepatic stellate cells were cultured in vitro and randomly assigned to 4 groups. Group A was control group with only DMEM culture medium applied, and groups B, C, D were experimental groups, with different doses of UDCA （1.0 mmol/L, 0.5 mmol/L and 0.25 mmol/L respectively） added into their DMEM culture medium for further culture of 24 hours and 48 hours. The protein expressions of TGFβ1, TGF type 1 receptor, Smad3, Smad4 and Smad7 were measured by Western blotting, as well as the expressions of TGFβ1, Smad3, Smad7 and cAMP response element （CREB） binding protein （CBP） mRNA by real-time PCR. SPSS 11.5 statistical package was adopted for data analyses. Results Compared with control group, the mRNA expressions of TGFβ1 in the high and middle UDCA dose groups for 24 hours and 48 hours significantly decreased （P 〈0.05）, the protein expressions of TGFβ1 in the two above groups for 48 hours and in the high dose group for 24 hours significantly decreased （P 〈0.05）. The protein and mRNA expressions of Smad3 in each UDCA dose group for 24 hours and 48 hours significantly decreased, with significant difference among different UDCA dose groups and between that of 24 hours and 48 hours observed （P 〈0.05）. The protein and mRNA expressions of Smad7 in the high and middle UDCA dose groups for 24 hours and 48 hours significantly increased. The CBP mRNA expression in each UDCA dose group for 24 hours and 48 hours significantly decreased （P 〈0.05）, with significant difference among different UDCA dose groups observed （P 〈0.05）. Conclusion UDCA co
基金Supported by Science Foundation of Education Department of Heilongjiang Province,China,no.12541430
文摘To investigate whether microRNA (miR)-34a mediates oxaliplatin (OXA) resistance of colorectal cancer (CRC) cells by inhibiting macroautophagy via the transforming growth factor (TGF)-β/Smad4 pathway.METHODSmiR-34a expression levels were detected in CRC tissues and CRC cell lines by quantitative real-time polymerase chain reaction. Computational search, functional luciferase assay and western blotting were used to demonstrate the downstream target of miR-34a in CRC cells. Cell viability was measured with Cell Counting Kit-8. Apoptosis and macroautophagy of CRC cells were analyzed by flow cytometry and transmission electron microscopy, and expression of beclin I and LC3-II was detected by western blotting.RESULTSExpression of miR-34a was significantly reduced while expression of TGF-β and Smad4 was increased in CRC patients treated with OXA-based chemotherapy. OXA treatment also resulted in decreased miR-34a levels and increased TGF-β and Smad4 levels in both parental cells and the OXA-resistant CRC cells. Activation of macroautophagy contributed to OXA resistance in CRC cells. Expression levels of Smad4 and miR-34a in CRC patients had a significant inverse correlation and overexpressing miR-34a inhibited macroautophagy activation by directly targeting Smad4 through the TGF-β/Smad4 pathway. OXA-induced downregulation of miR-34a and increased drug resistance by activating macroautophagy in CRC cells.CONCLUSIONmiR-34a mediates OXA resistance of CRC by inhibiting macroautophagy via the TGF-β/Smad4 pathway.
基金Supported by The Major Project of Applied Basic Research Plan of the Scientific and Technological Department of Tianjin,No.06YFJZJC02900
文摘AIM:To explore the anti-fibrotic effect of Haobie Yangyin Ruanjian Decoction(HYRD)on CCl4-induced hepatic fibrosis in rats and its modulation on the transforming growth factor(TGF)β-Smad signaling pathway.METHODS:Fifty-six healthy Wistar rats were randomly divided into five groups:normal control group(n=6),CCl4-induced hepatic fibrosis group(n=14) and three treatment groups(the treated rats received HYRD via oral administration at daily dosages of 8.2,2.5 and 0.82 g/kg,respectively)of HYRD(n=12,respectively).Experimental hepatic fibrosis was induced by subcutaneous injection of carbon tetrachloride solution(CCl4 dissolved in peanut oil,4:6,V/V)with 0.5 mL/100 g body weight for the first time,and then 0.3 mL/100 g body weight twice a week for 8 wk.In the former 2 wk,rats were raised by feedstuffⅠ(80% corn meal,20%lard,0.5%cholesterol).After 2 wk,they were raised by feedstuffⅡ(corn meal and 0.5% cholesterol).Except for the control group,30%alcohol solution was given orally to each rat every other day from the beginning,1 mL for each rat.Liver function parameters and hepatic hydroxyproline content were detected by chromatometry.Serum levels of hyaluronic acid(HA),typeⅣcollagen(CIV),typeⅢprecollagen(PCⅢ)and laminin(LN)were assayed with radioimmunoassay.Deposition of collagen was observed with hematoxylin-eosin staining and collagen staining.Gene expression of TGFβ1 and Smad3 were detected with real-time reverse transcriptase-polymerase chain reaction and Western blotting,respectively.RESULTS:The serum levels of alanine transaminase and aspartate transaminase were increased in the model group compared with the control group(P<0.01),and they were decreased in the three treatment groups compared with the model group.The serum levels of total protein and albumin were decreased in the model group and increased in the three treatment groups.The hepatic hydroxyproline content and serum levels of PCⅢ,HA,LN and CIV were markedly increased in the model group compared with the control group,and decreased in the tr
