AIM: Activated pancreatic stellate cells (PSCs) have been implicated in the pathogenesis of pancreatic fibrosis and inflammation. Primary PSCs can be subcultured only several times because of their limited growth pote...AIM: Activated pancreatic stellate cells (PSCs) have been implicated in the pathogenesis of pancreatic fibrosis and inflammation. Primary PSCs can be subcultured only several times because of their limited growth potential. A continuous cell line may therefore be valuable in studying molecular mechanisms of these pancreatic disorders. The aim of this study was to establish a cell line of rat PSCs by spontaneous immortalization.METHODS: PSCs were isolated from the pancreas of male Wistar rats, and conventional subcultivation was performed repeatedly. Telomerase activity was measured using the telomere repeat amplification protocol. Activation of transcription factors was assessed by electrophoretic mobility shift assay.Activation of mitogen-activated protein (MAP) kinases was examined by Western blotting using anti-phosphospecific antibodies. Expression of cytokine-induced neutrophil chemoattractant-1 was determined by enzyme immunoassay.RESULTS: Conventional subcultivation yielded actively growing cells. One clone was obtained after limiting dilution,and designated as SIPS. This cell line has been passaged repeatedly more than 2 years, and is thus likely immortalized.SIPS cells retained morphological characteristics of primary,culture-activated PSCs. SIPS expressed α-smooth muscle actin, glial acidic fibrillary protein, vimentin, desmin, type Ⅰ collagen, fibronectin, and prolyl hydroxylases. Telomerase activity and p53 expression were negative. Proliferation of SIPS cells was serum-dependent, and stimulated with platelet-derived growth factor-BB through the activation of extracellular signal-regulated kinase. Interleukin-1β activated nuclear factor-κB, activator protein-1, and MAP kinases.Interleukin-1β induced cytokine-induced neutrophil chemoattractant-1 expression through the activation of nuclear factor-κB and MAP kinases.CONCLUSION: SIPS cells can be useful for in vitro studies of cell biology and signal transduction of PSCs.展开更多
Interleukin (IL)-8 is a potent neutrophil chemotactic factor and a crucial mediator in neutrophil-dependent inflammation.Various cell types produce IL-8, either in response to external stimuli such as cytokines or bac...Interleukin (IL)-8 is a potent neutrophil chemotactic factor and a crucial mediator in neutrophil-dependent inflammation.Various cell types produce IL-8, either in response to external stimuli such as cytokines or bacterial infection, or aftermalignant transformation. Anti-IL-8 strategies have been considered for anti-inflammatory therapy. In this paper wedemonstrate that the RNA interference technique can be used to efficiently down-regulate IL-8 protein expression inairway epithelial cells. We used a helper-dependent adenoviral vector to express a small hairpin (sh)RNA targetinghuman IL-8 in cultured airway epithelial cells (IB3-1, Cftr-/-; C38, Cftr-corrected) stimulated with TNF-α, IL-1β orheat-inactivated Burkholderia cenocepacia. Stimulated IL-8 expression in IB3-1 and C38 cells was significantly reducedby shRNA expression. The shRNA targeting IL-8 had no effect on the activation of NF-κB, or on the protein levels ofIκB or IL-6, suggesting that this anti-IL-8 strategy was highly specific, and therefore may offer potential for thetreatment of inflammatory diseases.展开更多
Transgastric endoscopic necrosectomy has been recently introduced as the effective and alternative management of infected pancreatic necrosis and pancreatic abscess. However,up to 40% of patients who undergo endoscopi...Transgastric endoscopic necrosectomy has been recently introduced as the effective and alternative management of infected pancreatic necrosis and pancreatic abscess. However,up to 40% of patients who undergo endoscopic necrosectomy may need an additional percutaneous approach for subsequent peripancreatic fluid collection or non-resolution of pancreatic necrosis. This percutaneous approach may lead to persistent pancreatocutaneous fistula,which remains a serious problem and usually requires prolonged hospitalization,or even open-abdominal surgery. We describe the first case of pancreatocutaneous fistula and concomitant abdominal wall defect following transgastric endoscopic necrosectomy and percutaneous drainage,which were endoscopically closed with fibrin glue injection via the necrotic cavity.展开更多
It is discovered by the authors of this article thatchronic hepatitis and hepatocirrhosis (hereinafterchronic hepatopathy for short) are often accompaniedby some diseases of endocrine and mammary glands.The authors ha...It is discovered by the authors of this article thatchronic hepatitis and hepatocirrhosis (hereinafterchronic hepatopathy for short) are often accompaniedby some diseases of endocrine and mammary glands.The authors have studied the pathogenesis andtreatment of the complications as presented in thefollowing.展开更多
Objective： To observe the effect of acupuncture on hyperplasia of mammary glands. Methods： Sixty patients with hyperplasia of mammary glands were randomly divided into 2 groups, the treatment group and the control g...Objective： To observe the effect of acupuncture on hyperplasia of mammary glands. Methods： Sixty patients with hyperplasia of mammary glands were randomly divided into 2 groups, the treatment group and the control group, 30 cases in each group. The patients in the treatment group were treated by acupuncture combined with electromagnetic therapy, while the patients in the control group were treated by Tamoxifen. After treatment, the serum estradiol （E2） and progesterone （P） levels were detected during luteal phase. Results： The total effective rate of the treatment group was 90.3%, while it was 93.3% in the control group, there was no statistical difference （P〉0.05）. The E2 levels decreased, and the P levels increased in the two groups. After treatment, the E2 and P levels were significantly different from those before in the two groups （P 〈 0.05）. And there was no statistical difference of the E2 and P levels between the two groups both before and after the treatments. Conclusion： Acupuncture combined with electromagnetic therapy can regulate the hypothalamic- pituitary-ovarian axis＇ function, and can repair normal process from hyperplasia to involution of the mammary glands. According to our study, the effect of acupuncture combine with electromagnetic therapy was almost the same with the western medicine.展开更多
基金Grant-in-Aid for Encouragement of Young Scientists from Japan Society for the Promotion of Science(to A.M.)Pancreas Research Foundation of Japan(to A.M.)
文摘AIM: Activated pancreatic stellate cells (PSCs) have been implicated in the pathogenesis of pancreatic fibrosis and inflammation. Primary PSCs can be subcultured only several times because of their limited growth potential. A continuous cell line may therefore be valuable in studying molecular mechanisms of these pancreatic disorders. The aim of this study was to establish a cell line of rat PSCs by spontaneous immortalization.METHODS: PSCs were isolated from the pancreas of male Wistar rats, and conventional subcultivation was performed repeatedly. Telomerase activity was measured using the telomere repeat amplification protocol. Activation of transcription factors was assessed by electrophoretic mobility shift assay.Activation of mitogen-activated protein (MAP) kinases was examined by Western blotting using anti-phosphospecific antibodies. Expression of cytokine-induced neutrophil chemoattractant-1 was determined by enzyme immunoassay.RESULTS: Conventional subcultivation yielded actively growing cells. One clone was obtained after limiting dilution,and designated as SIPS. This cell line has been passaged repeatedly more than 2 years, and is thus likely immortalized.SIPS cells retained morphological characteristics of primary,culture-activated PSCs. SIPS expressed α-smooth muscle actin, glial acidic fibrillary protein, vimentin, desmin, type Ⅰ collagen, fibronectin, and prolyl hydroxylases. Telomerase activity and p53 expression were negative. Proliferation of SIPS cells was serum-dependent, and stimulated with platelet-derived growth factor-BB through the activation of extracellular signal-regulated kinase. Interleukin-1β activated nuclear factor-κB, activator protein-1, and MAP kinases.Interleukin-1β induced cytokine-induced neutrophil chemoattractant-1 expression through the activation of nuclear factor-κB and MAP kinases.CONCLUSION: SIPS cells can be useful for in vitro studies of cell biology and signal transduction of PSCs.
文摘Interleukin (IL)-8 is a potent neutrophil chemotactic factor and a crucial mediator in neutrophil-dependent inflammation.Various cell types produce IL-8, either in response to external stimuli such as cytokines or bacterial infection, or aftermalignant transformation. Anti-IL-8 strategies have been considered for anti-inflammatory therapy. In this paper wedemonstrate that the RNA interference technique can be used to efficiently down-regulate IL-8 protein expression inairway epithelial cells. We used a helper-dependent adenoviral vector to express a small hairpin (sh)RNA targetinghuman IL-8 in cultured airway epithelial cells (IB3-1, Cftr-/-; C38, Cftr-corrected) stimulated with TNF-α, IL-1β orheat-inactivated Burkholderia cenocepacia. Stimulated IL-8 expression in IB3-1 and C38 cells was significantly reducedby shRNA expression. The shRNA targeting IL-8 had no effect on the activation of NF-κB, or on the protein levels ofIκB or IL-6, suggesting that this anti-IL-8 strategy was highly specific, and therefore may offer potential for thetreatment of inflammatory diseases.
文摘Transgastric endoscopic necrosectomy has been recently introduced as the effective and alternative management of infected pancreatic necrosis and pancreatic abscess. However,up to 40% of patients who undergo endoscopic necrosectomy may need an additional percutaneous approach for subsequent peripancreatic fluid collection or non-resolution of pancreatic necrosis. This percutaneous approach may lead to persistent pancreatocutaneous fistula,which remains a serious problem and usually requires prolonged hospitalization,or even open-abdominal surgery. We describe the first case of pancreatocutaneous fistula and concomitant abdominal wall defect following transgastric endoscopic necrosectomy and percutaneous drainage,which were endoscopically closed with fibrin glue injection via the necrotic cavity.
文摘It is discovered by the authors of this article thatchronic hepatitis and hepatocirrhosis (hereinafterchronic hepatopathy for short) are often accompaniedby some diseases of endocrine and mammary glands.The authors have studied the pathogenesis andtreatment of the complications as presented in thefollowing.
文摘Objective： To observe the effect of acupuncture on hyperplasia of mammary glands. Methods： Sixty patients with hyperplasia of mammary glands were randomly divided into 2 groups, the treatment group and the control group, 30 cases in each group. The patients in the treatment group were treated by acupuncture combined with electromagnetic therapy, while the patients in the control group were treated by Tamoxifen. After treatment, the serum estradiol （E2） and progesterone （P） levels were detected during luteal phase. Results： The total effective rate of the treatment group was 90.3%, while it was 93.3% in the control group, there was no statistical difference （P〉0.05）. The E2 levels decreased, and the P levels increased in the two groups. After treatment, the E2 and P levels were significantly different from those before in the two groups （P 〈 0.05）. And there was no statistical difference of the E2 and P levels between the two groups both before and after the treatments. Conclusion： Acupuncture combined with electromagnetic therapy can regulate the hypothalamic- pituitary-ovarian axis＇ function, and can repair normal process from hyperplasia to involution of the mammary glands. According to our study, the effect of acupuncture combine with electromagnetic therapy was almost the same with the western medicine.
