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1.
Beneficial effects of the synthetic trypsin inhibitor camostate in cerulein-induced acute pancreatitis in rats 总被引:1,自引:0,他引:1
Dr. Makoto Otsuki MD Satoshi Tani MD Yoshinori Okabayashi MD Masatoshi Fuji MD Takahiko Nakamura MD Takashi Fujisawa MD Hiroshi Itoh MD 《Digestive diseases and sciences》1990,35(2):242-250
The therapeutic effect and the mechanism of action of the synthetic trypsin inhibitor camostate were studied in a rat model of acute interstitial pancreatitis induced by four subcutaneous injections of 20 g/kg body weight of cerulein at hourly intervals. Rats with acute pancreatitis were given either 100 mg/kg body weight camostate or volume- and pH-adjusted water via an orogastric tube 30 min after the last cerulein injection. The elevation of serum amylase activity was significantly reduced by camostate treatment and the peak value was seen 1 hr earlier than that observed in the rats that did not receive camostate. Camostate also inhibited the reduction in pancreatic content of lipase and amylase seen during experimental pancreatitis. These effects were accompanied by alleviation of the histologic signs of acute pancreatitis such as cellular infiltration and acinar cell vacuolization. After oral administration, camostate and its metabolite were absorbed from the intestine and were detectable in plasma for more than 6 hr in concentrations high enough to have antiprotease activity. In addition, camostate in the duodenum was able to increase pancreatic juice flow and protein output and to stimulate endogenous secretin release. These results suggest that oral administration of camostate reduces the severity of cerulein-induced acute pancreatitis by releasing endogenous secretin and by its antiprotease activity.This work was supported in part by a grant from the Japanese Ministry of Health and Welfare (Intractable Disease of the Pancreas). 相似文献
2.
Katsusuke Satake M.D. Sin-Soo Ha Akihito Hiura Hideki Nishiwaki 《Journal of gastroenterology》1993,28(1):64-71
The therapeutic effect of a new synthetic protease inhibitor on hemodynamic changes was studied in experimental acute pancreatitis.
Pancreatitis was induced by the injection of autologous bile mixed with trypsin into the main pancreatic duct after ligating
the accessory duct. Plasma beta-endorphin concentrations and cardiovascular function were measured. Seventeen dogs (control
group) were given 10 ml/kg/hr of lactate Ringer’s solution intravenously 1 hr before the induction of pancreatitis and throughout
the experiment. Seven dogs (the low protease inhibitor group) were given an intravenous bolus injection of 0.4mg/kg of a new
synthetic protease inhibitor, E-3123 (4-(2-succiminido-ethylthio)4-geranidinobenzoate methanesulfate) 30 min after the induction
of pancreatitis and then a continuous intravenous infusion at 3 Μg/kg/min throughout the experiment. Seven dogs (the high
protease inhibitor group) received an intravenous bolus injection of 3 mg/kg and a continuous intravenous infusion at 50 Μg/kg/min
of E-3123 according to the same method as in the low protease inhibitor group. The mortality rate during the experiment was
41% (7/17) in the control group, 28.5% (2/7) in the high protease inhibitor group and 0% in the low protease inhibitor group.
The increase in the plasma beta-endorphin levels in the control group was statistically significant. When E-3123 was given
30 min after the induction of pancreatitis, the increase in the plasma beta-endorphin levels in the high protease inhibitor
group was also found to be increased statistically significant, compared with preinduction levels, but the increase was statistically
significantly lower than that in the control group. Plasma beta-endorphin levels in the low protease inhibitor group, however,
did not increase. The protease inhibitor infusion as used in this experiment can bring about improvement in hypotension and
myocardial depression to an extent by inhibiting the release of betaendorphin, suggesting that the inhibitory effect of the
protease inhibitor on beta-endorphin release contributes to the improvement in hemodynamic changes during pancreatitis. There
may also be an optimal therapeutic dose of this drug for the treatment of hypotension and myocardial depression secondary
to betaendorphin release.
This work was supported in part by a grant-in-aid from the Japanese Ministry of Health and Welfare (Pancreatic Disease) and
Grant 03670638 from the Japanese Ministry of Education, Science and Culture. 相似文献
3.
TETSUYA HIRANO TADAO MANABE KATSUHIRO IMANISHI TAKAYOSHI TOBE 《Journal of gastroenterology and hepatology》1993,8(1):52-59
Abstract The role of infectious factors in the pathogenesis of acute pancreatitis and the protective effect of combined therapy with a new potent synthetic protease inhibitor, E3123, and a new potent synthetic cephalosporin, Shiomarin were examined in rat acute pancreatitis. Sodium taurocholate injection into the pancreatico-biliary duct of rats caused severe pancreatitis with a high mortality rate, characterized by hyperamylasaemia, high amylase activity in ascitic fluid, hyperendotoxaemia and a high serum level of fibrin degradation products (FDP) and redistribution of cathepsin B from the lysosomal fraction to the zymogen fraction. Sodium taurocholate injection into the pancreatico-biliary duct also caused the bacterial growth in the pancreas. In rats with E3123 infusion almost all parameters were improved, including mortality rate, serum and ascitic fluid amylase levels, plasma endotoxin and serum FDP levels, and distribution of lysosomal enzyme. But combination therapy with E3123 and Shiomarin was significantly more protective than E3123 therapy alone.
These results indicate that infection plays an important role in the development of severe pancreatitis and that combination therapy with a new synthetic protease inhibitor and a new potent antibiotic may be useful in the treatment of severe pancreatitis. 相似文献
These results indicate that infection plays an important role in the development of severe pancreatitis and that combination therapy with a new synthetic protease inhibitor and a new potent antibiotic may be useful in the treatment of severe pancreatitis. 相似文献
4.
Claus Niederau Ralph Brinsa Niederau Reinhard Lüthen Georg Strohmeyer Linda D. Ferrell 《Journal of gastrointestinal cancer》1995,17(2):189-196
Summary The present studies were done to evaluate the therapeutic potential of C1-esterase inhibitor in three different models of
acute pancreatitis: (1) Edematous pancreatitis with acinar cell necrosis was induced by 7-h ip injections of 50 μg/kg cerulein
in mice; (2) Hemorrhagic pancreatitis was induced by feeding a cholinedeficient, ethionine-supplemented (CDE) diet in mice;
and (3) Hemorrhagic pancreatitis was induced by retrograde infusion of 0.6 mL 5% sodium-taurocholate into the pancreatic duct
in rats. C1-esterase inhibitor was given at 100 mg/kg iv before the onset of pancreatitis and at certain intervals thereafter.
The severity of pancreatitis was assessed at various times after its onset by determination of serum amylase, by grading of
histological alterations, and by determination of survival (survival determined only in models of hemorrhagic pancreatitis).
In some of the models, C1-esterase inhibitor slightly ameliorated the degree of histological alterations; the increase in
serum amylase was reduced by C1-esterase inhibitor only in CDE diet-induced pancreatitis. In all three models, C1-esterase
inhibitor, however, failed to cause major beneficial effects and also failed to improve survival in taurocholate- and diet-induced
pancreatitis. Additional studies in 12 patients with acute pancreatitis showed that C1-esterase inhibitor activity was markedly
increased in serum of all patients during the first 8 d of the disease, suggesting that C1-esterase inhibitor behaves like
an acute phase protein. Taken together the results from the animal and the human studies, C1-esterase inhibitor appears to
only have a limited potential for treatment of acute pancreatitis. 相似文献
5.
Effect of urinary trypsin inhibitor on pancreatic cellular and lysosomal fragility in cerulein-induced acute pancreatitis in rats 总被引:1,自引:0,他引:1
Tetsuya Hirano MD Dr. Tadao Manabe MD Takayoshi Tobe MD 《Digestive diseases and sciences》1993,38(4):660-664
We evaluated the protective effect and the mechanism of action of the trypsin inhibitor, urinastatin, extracted from human urine, in experimental acute pancreatitis induced by a supramaximal dose of cerulein (5 g/kg/hr for 3.5 hr). Urinastatin in a dose of 10,000 units/kg/hr was given by three different methods of continuous infusion: (1) 2 hr before and during cerulein infusion, (2) only during cerulein infusion, and (3) starting 1 hr after the beginning of cerulein infusion and continued for 3.5 hr. In protocol 1 and 2 urinastatin was significantly more protective than in 3. In protocol 1 urinastatin was very protective in all parameters tested (serum amylase level, pancreatic water and amylase content, distribution of lysosomal enzymes, cellular and lysosomal fragility). These results suggest that the administration of urinastatin before and during cerulein infusion may suppress the pathogenesis and evolution of pancreatitis by inhibiting the chain reaction of pancreatic enzyme activation closely related to redistribution of lysosomal enzyme and lysosomal fragility. 相似文献
6.
Hideki Nishiwaki M.D. Katsusuke Satake Akihito Hiura Kaoru Umeyama 《Journal of gastroenterology》1989,24(2):177-180
Pancreatic inschemia, especially due to pancreatic microcirculation disturbance, has been considered to trigger and aggravate
acute pancreatitis. In this work experimental acute pancreatitis was produced by autologous bile and trypsin in mongrel dogs
to study the time-course changes in systemic and local hemodynamics in association with disease progress. In addition, the
effects of a new synthetic pancreatic protease inhibitor (PATM, 3 mg/kg/hr, i.v.) on systemic and local circulation were examined.
In animals with untreated pancreatitis the mean baseline pancreatic microflow was 55.6 ± 17.0 ml/min/ 100g before the onset
of pancreatitis and this decreased by 22% and 52% at 1 hr and 5 hr, respectively. The femoral arterial pressure and cardiac
index also decreased during the 5 hr experiment at period in comparison with the respective preoperative levels. The portal
venous flow showed a sharp reduction immediately after the onset of pancreatitis, staying at a low level thereafter. The pancreatic
microflow was significantly improved by PATM treatment for the first 60 min and the portal venous flow for the first 120 min.
PATM treatment prevented the decrease in femoral arterial pressure, although it failed to exert any appreciable effect upon
the cardiac index. These findings suggest that intravenous administration of PATM might be of value for improving the pancreatic
microflow and portal venous flow, at least in the early stage of experimental acute pancreatitis in dogs. 相似文献
7.
François Paye MD Jacques Chariot PhD Georges Molas MD Joëlle Benessiano PhD Dr. Claude Rozé MD PhD 《Digestive diseases and sciences》1996,41(10):1959-1965
During acute pancreatitis, data obtainedin vitro suggest that pancreatic lipase, acting on circulating or tissular triglycerides, might generate nonesterified fatty acids (NEFA) that could promote pancreatic and fat tissue necrosis. This work determined whether NEFA were actually producedin vivo in pancreatic tissue and in blood during cerulein-induced pancreatitis in rats. Intraperitoneal injections of cerulein induced pancreatitis. To promote the possible NEFA release by pancreatic lipase, a venous infusion of human very low density lipoprotein (VLDL) was used to cause hypertriglyceridemia. NEFA were measured in portal and aortic blood and in tissue extracts prepared from pancreas homogenates. NEFA did not increase either in peripheral or in portal blood. In pancreatic tissue, NEFA levels did not differ from controls. The major hypertriglyceridemia produced by human VLDL intravenous infusion neither altered the course of the disease nor promoted plasma NEFA release. The role commonly attributed to NEFA in acute pancreatitis seems questionable.Dr. Paye was the recipient of a scholarship from the Fondation pour la Recherche Médicale (Paris). Partial financial support of the work was provided by the Conseil Scientifique of Faculté X. Bichat and by Association Charles Debray. 相似文献
8.
Summary
Background. Proteases and protease inhibitors have been indicated to play an important role in both human and experimental acute pancreatitis,
although little is known about them in rats.
Methods. Three percent sodium taurocholate was infused into the bilio-pancreatic duct to induce AP, and over 0–72 h we measured lipase,
amylase, albumin, prekallikrein, factor X, α-1-macroglobulin, α-2-antiplasmin, antithrombin III, α-1-protease inhibitor, and
C1-esterase inhibitor (all in plasma) and histologic and macroscopic findings.
Results. A severe necrotizing, nonlethal, AP was induced with an early increase in plasma lipase and α-amylase activity levels and
peritoneal exudate followed by a return to near control levels after 72 h. Histologic score and pancreatic wet weight ratio
increased initially and remained high during the observation period. The protease inhibitors C1-esterase inhibitor, α-2-antiplasmin,
and antithrombin III decreased early, within 0–6 h, whereafter levels normalized. The protease inhibitors α-1-macroglobulin
and α-1-protease inhibitor later gradually decreased over the 72 h.
Conclusion. Taurocholate-induced acute pancreatitis (AP) in the rat mimics early necrotizing human pancreatitis. Protease
activation and protease inhibitor consumption occur consistent with a two-stage development, and contact-phase activation
is a possible primary event in this model. 相似文献
9.
10.
Katsusuke Satake M.D. Sin-su Ha Akihito Hiura Hideki Nishiwaki Aizo Haku Kaoru Umeyama 《Journal of gastroenterology》1990,25(6):720-726
The coagulation disturbance observed during severe acute pancreatitis before and after the infusion of a new synthetic low
molecular weight protease inhibitor (Fut-175) was compared. The coagulofibrinolytic changes after acute pancreatitis was induced
by the intraductal injection of an autologous bile and trypsin mixture showed decreased platelet counts, decreased plasma
fibrinogen levels, prolonged partial prothrombin time and increased fibrinogen degradation products. In addition, markers
of hypercoagulation showed increased fibrin-opeptide A and decreased antithrombin III. The two markers of fibrinolysis showed
increased Bβ15–42 immunoreactive peptide and decreased α2 antiplasmin. After the infusisn of Fut-175, the coagulo-fibrinolytic abnormalities, which were bserved during severe acute
pancreatitis without infusion of Fut-175, were improved. Furthermore, Fut-175 could suppress the rise in fibrino-peptide A
and Bβ15–42 immunoreactive peptide and decrease in antithrombin III and α2 antiplasmin. Thus, Fut-175 seems to be an effective inhitor of protease-mediated hypercoagulation and fibrinolysis in severe
acute pancreatitis.
This work is supported by a part of grant-in aid of pancreatic disease of Japanese Ministry of Health and Welfare. 相似文献
11.
Background/Aims
Heat shock proteins (HSPs) protect rats from cerulein-induced acute pancreatitis (AP) by preventing the subcellular redistribution of cathepsin B and the activation of trypsinogen. Autophagy plays a critical role in the secretion of digestive enzymes and triggering of cerulein-induced AP via the colocalization of trypsinogen and lysosomes. Therefore, using a rat cerulein-induced AP model, we investigated whether HSPs prevent AP by regulating autophagy.Methods
Twelve hours after fed standard laboratory chow and water, the experimental groups (cerulein, water-immersion [WI]-cerulein and heat-shock [HS]-cerulein) and the control groups (control, WI, and HS) received one intraperitoneal injection of cerulein (50 µg/kg) or saline, respectively. All of the rats were sacrificed at 6 hours after injection. The severity of the AP was assessed based on the serum amylase level and the histological and electron microscopy findings. Western blotting was also performed for HSP60/70 and LC3B-II.Results
WI and HS induced HSP60 and HSP70, respectively. The induced HSP60/70 effectively prevented the development of cerulein-induced AP. Autophagy developed in the rats with cerulein-induced AP and was documented by the expression of LC3-II and electron microscopy findings. The WI-stressed rats and HS-treated rats did not develop cerulein-induced autophagy.Conclusions
HSPs exert protective effects against cerulein-induced AP in rats by inhibiting autophagy. 相似文献12.
Leptin treatment ameliorates acute lung injury in rats with cerulein-induced acute pancreatitis 总被引:2,自引:0,他引:2
Gultekin FA Kerem M Tatlicioglu E Aricioglu A Unsal C Bukan N 《World journal of gastroenterology : WJG》2007,13(21):2932-2938
AIM:To determine the effect of exogenous leptin on acute lung injury (ALI) in cerulein-induced acute pancreatitis (AP). METHODS:Forty-eight rats were randomly divided into 3 groups. AP was induced by intraperitoneal (i.p.) injection of cerulein (50 μg/kg) four times,at 1 h intervals. The rats received a single i.p. injection of 10 μg/kg leptin (leptin group) or 2 mL saline (AP group) after cerulein injections. In the sham group,animals were given a single i.p. injection of 2 mL saline. Experimental samples were collected for biochemical and histological evaluations at 24 h and 48 h after the induction of AP or saline administration. Blood samples were obtained for the determination of amylase,lipase,tumor necrosis factor (TNF)-a,interleukin (IL)-1β,macrophage inflammatory peptide (MIP)-2 and soluble intercellular adhesion molecule (sICAM)-1 levels,while pancreatic and lung tissues were removed for myeloperoxidase (MPO) activity,nitric oxide (NOx) level,CD40 expression and histological evaluation. RESULTS:Cerulein injection caused severe AP,confirmed by an increase in serum amylase and lipase levels,histopathological findings of severe AP,and pancreatic MPO activity,compared to the values obtained in the sham group. In the leptin group,serum levels of MIP-2,sICMA-1,TNF-a,and IL-1b,pancreatic MPO activity,CD40 expression in pancreas and lung tissues,and NOx level in the lung tissue were lower compared to those in the AP group. Histologically,pancreatic and lungdamage was less severe following leptin administration. CONCLUSION:Exogenous leptin attenuates inflammatory changes,and reduces pro-inflammatory cytokines,nitric oxide levels,and CD40 expression in ceruleininduced AP and may be protective in AP associated ALI. 相似文献
13.
Ibrahim Akyazi Evren Eraslan Ahmet Gülubuk Elif Ergül Ekiz Zeynep L rakli Damla Haktanir Deniz Aktaran Bala Mete zkurt Erdal Matur Mukaddes zcan 《World journal of gastroenterology : WJG》2013,19(19):2894-2903
AIM:To investigate the effects of long term pretreatment with low-,medium-and high-dose aspirin(acetylsalicylic acid,ASA) on a model of acute pancreatitis(AP) induced in rats.METHODS:Forty male Wistar rats were used.Three experimental groups,each consisting of eight animals,received low-(5 mg/kg per day),medium-(150 mg/kg per day) and high-dose(350 mg/kg per day) ASA in supplemented pellet chow for 100 d.Eight animals,serving as the AP-control group,and another eight,serving as reference value(RV) group,were fed with standard pellet chow for the same period.After pretreatment,AP was induced in the experimental animals by intraperitoneal administration of cerulein(2 × 50 μg/kg),while the RV group received saline in the same way.Twelve hours after the second injection,the animals were sacrificed.Pancreatic tissue and plasma samples were collected.One part of the collected pancreatic tissues was used for histopathological evaluation,and the remaining portion was homogenized.Cytokine levels [tumor necrosis factor,interleukin(IL)1β,IL-6],hemogram parameters,biochemical parameters(amylase and lipase),nuclear factor-κB,aspirin triggered lipoxins and parameters related to the antioxidant system(malondialdehyde,nitric oxide,hemeoxygenase-1,catalase and superoxide dismutase) were measured.RESULTS:Cerulein administration induced mild pancreatitis,characterized by interstitial edema(total histopathological score of 5.88 ± 0.44vs 0.25 ± 0.16,P < 0.001).Subsequent pancreatic tissue damage resulted in an increase in amylase(2829.71 ± 772.48 vs 984.57 ± 49.22 U/L,P = 0.001) and lipase(110.14 ± 75.84 U/L vs 4.71 ± 0.78 U/L,P < 0.001) in plasma,and leucocytes(6.89 ± 0.48 vs 4.36 ± 0.23,P = 0.001) in peripheral blood.Cytokines,IL-1β(18.81 ± 2.55 pg/μg vs 6.65 ± 0.24 pg/μg,P = 0.002) and IL-6(14.62 ± 1.98 pg/μg vs 9.09 ± 1.36 pg/μg,P = 0.04) in pancreatic tissue also increased.Aspirin pretreatment reduced the increase in the aforementioned parameters to a certain degree and partially improved the histopat 相似文献
14.
Andrzej Dabrowski Antoni Gabryelewicz Lech Chyczewski 《Journal of gastrointestinal cancer》1991,8(1):1-11
Acute edematous pancreatitis was induced in Wistar male rats by iv infusion of cerulein (CR) in the dose of 5.10-6g.kg-1.h-1 during 3 or 6 h. The effect of BN 52021—platelet activating factor (PAF) receptor antagonist, against this model of disease
was examined. BN 52021 was applied iv as a bolus injection in the dose of 5.10-3g.kg-1 at 0 time. Treatment with this agent significantly ameliorates cerulein-induced acute pancreatitis in rats. The effect of
BN 52021 was expressed by significant reduction of pancreas edema, diminution of hyperamylasemia, lack of superoxide dismutase
activity depletion, and inhibition of lipid peroxidation in pancreatic tissue. These changes were accompanied by significant
reduction of acinar cells vacuolization and remarkable inhibition of infiltration with inflammatory cells in the interacinar
space. We suppose that beneficial effect of BN 52021 against cerulein-induced acute pancreatitis in rats depends on the prevention
of inflammatory cells activation and subsequent generation of oxygen radicals within pancreatic tissue. 相似文献
15.
Hyperlipidemia intensifies cerulein-induced acute pancreatitis associated with activation of protein kinase C in rats 总被引:4,自引:0,他引:4
AIM: To investigate the effects of hyperlipidemia on acute pancreatitis (AP) and the possible mechanisms. METHODS: Rat models of hyperlipidemia and AP were established by Triton WR1339 and cerulein respectively. Human albumin was used to treat AP complicated by hyperlipidemia. In each group, we compared the histological score, volume of ascites, ratio of pancreatic wet/dry weight, serum amylase (AMY) and pancreatic acinar cell apoptosis. The level of protein kinase C (PKC) membrane translocation in pancreatic tissue was detected by Western blot. RESULTS: In the hyperlipidemia model established by Triton WR1339, triglyceride (TG) increased remarkably and reached its peak 6 h after injection, and most rats developed mild acute pancreatitis. Histological score, volume of ascites, ratio of wet/dry weight and serum AMY in AP animals with hyperlipidemia were obviously higher than those in AP animals (P < 0.05) and decreased after albumin therapy but not significantly (P > 0.05). Apoptotic cells detected by terminal deoxynucleotidyl transferase-mediated dUTPbiotin nick end labeling (TUNEL) increased in AP animals with hyperlipidemia and did not change distinctly after albumin therapy. PKC membrane translocation level increased in AP animals with hyperlipidemia and decreased remarkably after albumin therapy (P < 0.05). CONCLUSION: Hyperlipidemia may induce AP or intensify pancreatic injury. Albumin therapy can not alleviate pancreatic lesion effectively. PKC activation may be one mechanism by which AP is intensified by hyperlipidemia. 相似文献
16.
Artur Dembinski Zygmunt Warzecha Piotr J. Konturek Piotr Ceranowicz Stanislaw J. Konturek 《Journal of gastrointestinal cancer》1996,19(3):179-189
Summary
Conclusion
Stimulation of afferent neurons by capsaicin exerts protective activity against cerulein-induced pancreatitis. This action
is dependent on endogenous release of nitric oxide (NO). Deactivation of afferent neurons by high doses of capsaicin contributes
to the severity of pancreatitis. This action involves mainly decreased pancreatic blood flow (PBF). Afferent nerves and NO
cooperate in the maintenance of the integrity of pancreatic tissue.
Background Stimulation of capsaicin-sensitive afferent fibers protects gastric mucosa against damage and causes changes in mucosal blood
flow. The aim of the present study was to determine the role of stimulation or ablation of capsaicin-sensitive neurons and
NO in the course of cerulein-induced pancreatitis in the rat.
Methods Low and high doses of capsaicin were administered to animals with pancreatitis and to those without pancreatitis. The effect
on several parameters was assessed. NO activity was blocked byN
G-nitro-l-arginine.
Results We found that a low dose of capsaicin administered intragastrically caused an increase in PBF. A neurotoxic dose of capsaicin
caused a decrease in PBF, RNA content, and DNA synthesis. Pancreatitis led to a significant decrease in PBF and DNA synthesis,
but an increase in pancreatic weight, protein content, plasma amylase concentration, and neutrophil adherence. Stimulatory
doses of capsaicin attenuated the pancreatic tissue damage of pancreatitis, and alteration of PBF, DNA synthesis, and neutrophil
adherence. Capsaicin-induced ablation of afferent neurons caused an increase in all indicators of pancreatic damage. Blocking
NO enhanced pancreatic damage, and this was reversed by addition ofl-arginine. 相似文献
17.
Masanori Sugiyama Yutaka Atomi Nobuaki Wada Akira Kuroda Tetsuichiro Muto 《Journal of gastroenterology》1997,32(3):374-379
Oral administration of a protease inhibitor (camostat) induces pancreatic hypersecretion via hormonal and neural systems in
humans. Camostat may also affect gallbladder motility via these systems. The aim of this study was to evaluate the effect
of camostat on gallbladder function. Gallbladder emptying in response to caerulein administration and to egg yolk ingestion
was examined ultrasonographically in 15 patients with mild chronic pancreatitis before and after 6 months of camostat treatment,
and in 10 control subjects. The plasma cholecystokinin concentration after yolk ingestion was measured by radioimmunoassay.
Fasting gallbladder volume and contractile function, whether stimulated by caerulein or yolk, did not differ between pancreatitis
patients before camostat treatment and controls. Plasma cholecystokinin levels, basal and yolk-stimulated, did not differ
between nontreated pancreatitis patients and control subjects. Fasting volume had decreased significantly by 1, 3, and 6 months
of camostat treatment, while contractile function was not affected. Camostat did not influence plasma cholecystokinin levels.
Oral administration of a protease inhibitor appears to decrease fasting gallbladder volume via a mechanism other than cholecystokinin
release. 相似文献
18.
Ana Ferrero-Andr s Arnau Panisello-Rosell Joan Rosell -Catafau Emma Folch-Puy 《World journal of gastroenterology : WJG》2020,26(39):5970-5982
BACKGROUND Acute pancreatitis(AP) is a sudden inflammatory process of the pancreas that may also involve surrounding tissues and/or remote organs. Inflammation and parenchymal cell death are common pathological features of this condition and determinants of disease severity. Polyethylene glycols(PEGs) are nonimmunogenic, non-toxic water-soluble polymers widely used in biological, chemical, clinical and pharmaceutical settings.AIM To evaluate the protective effect of a 35-k Da molecular weight PEG(PEG35) on the pancreatic damage associated to cerulein-induced acute pancreatitis in vivo and in vitro.METHODS Wistar rats were assigned at random to a control group, a cerulein–induced AP group and a PEG35 treatment group. AP was induced by five hourly intraperitoneal injections of cerulein(50 μg/kg/bw), while the control animals received saline solution. PEG35 was administered intraperitoneally 10 minutes before each cerulein injection in a dose of 10 mg/kg. After AP induction, samples of pancreatic tissue and blood were collected for analysis. AR42 J pancreatic acinar cells were treated with increasing concentrations of PEG35 prior to exposure with tumor necrosis factor α(TNFα), staurosporine or cerulein. The severity of AP wasdetermined on the basis of plasma levels of lipase, lactate dehydrogenase activity, pancreatic edema and histological changes. To evaluate the extent of the inflammatory response, the gene expression of inflammation-associated markers was determined in the pancreas and in AR42 J-treated cells. Inflammation-induced cell death was also measured in models of in vivo and in vitro pancreatic damage.RESULTS Administration of PEG35 significantly improved pancreatic damage through reduction on lipase levels and tissue edema in cerulein-induced AP rats. The increased associated inflammatory response caused by cerulein administration was attenuated by a decrease in the gene expression of inflammation-related cytokines and inducible nitric oxide synthase enzyme in the pancreas. In contrast, pancreatic tissue m RNA expression of interleukin 10 was markedly increased. PEG35 treatment also protected against inflammation-induced cell death by attenuating lactate dehydrogenase activity and modulating the pancreatic levels of apoptosis regulator protein BCL-2 in cerulein hyperstimulated rats. Furthermore, the activation of pro-inflammatory markers and inflammationinduced cell death in pancreatic acinar cells treated with TNFα, cerulein or staurosporine was significantly reduced by PEG35 treatment, in a dose-dependent manner.CONCLUSION PEG35 ameliorates pancreatic damage in cerulein-induced AP and AR42 J-treated cells through the attenuation of the inflammatory response and associated cell death. PEG35 may be a valuable option in the management of AP. 相似文献
19.
Seo SW Jung WS Piao TG Hong SH Yun KJ Park RK Shin MK Song HJ Park SJ 《World journal of gastroenterology : WJG》2007,13(16):2298-2304
AIM: To investigate the effect of selective Cycloo- xygenase-2 (COX-2) inhibitor 4-[5-(4-Chloro-phenyl)-3- (trifluoromethyl)-1H-pyrazol-1-yl] benzenesulfonamide (SC-236), on the cholecystokinin (CCK)-octapeptide- induced acute pancreatitis (AP) in rats. METHODS: Wistar rat weighing 240 g to 260 g were divided into three groups. (1) Normal DMSO treated group, (2) SC-236 at 4 mg/kg treated group; SC-236 systemically administered via the intravenous (i.v.) catheter, followed by 75 μg/kg CCK octapeptide subcutaneously three times, after 1, 3 and 5 h. This whole procedure was repeated for 5 d. (3) Dimethyl sulfoxide (DMSO) treated group: an identical protocol was used in this group as in the SC-236 cohort (see 2. above). Repeated CCK octapeptide treatment resulted in a typical experimentally induced pancreatitis in the Wistar rats. RESULTS: SC-236 improved the severity of CCK- octapeptide-induced AP as measured by laboratory criteria [the pancreatic weight/body weight (p.w/ b.w) ratio, the level of serum amylase and lipase]. The SC-236 treated group showed minimal histologic evidence of pancreatitis and a significant reduction inmyeloperoxidase activity. SC-236 also increased heat shock protein (HSP)-60 and HSP72 compared with the DMSO-treated group in the CCK-octapeptide-induced AP and also reduced the pancreatic levels of COX-2. Furthermore, SC-236 reduced proinflammatory cytokine synthesis and inhibited NF-κB activation compared with the DMSO-treated group in the CCK-octapeptide-induced AP. CONCLUSION: Our results suggested that COX-2 plays pivotal role in the development of AP and COX-2 inhibitors may play a beneficial role in preventing AP. 相似文献
20.
Bae GS Kim MS Park KC Koo BS Jo IJ Choi SB Lee DS Kim YC Kim TH Seo SW Shin YK Song HJ Park SJ 《World journal of gastroenterology : WJG》2012,18(25):3223-3234
AIM: To determine if the fraction of Nardostachys jatamansi (NJ) has the potential to ameliorate the severity of acute pancreatitis (AP).METHODS: Mice were administered the biologically active fraction of NJ, i.e., the 4th fraction (NJ4), intraperitoneally, and then injected with the stable cholecystokinin analogue cerulein hourly for 6 h. Six hours after the last cerulein injection, the pancreas, lung, and blood were harvested for morphological examination, measurement of cytokine expression, and examination of neutrophil infiltration.RESULTS: NJ4 administration attenuated the severity of AP and lung injury associated with AP. It also reduced cytokine production and neutrophil infiltration and resulted in the in vivo up-regulation of heme oxygenase-1 (HO-1). Furthermore, NJ4 and its biologically active fraction, NJ4-2 inhibited the cerulein-induced death of acinar cells by inducing HO-1 in isolated pancreatic acinar cells.CONCLUSION: These results suggest that NJ4 may be a candidate fraction offering protection in AP and NJ4 might ameliorate the severity of pancreatitis by inducing HO-1 expression. 相似文献