摘要:

ABSTRACTThe effects of cholecystokinin octapeptide (CCK‐OP) on the gall‐bladder (GB) and sphincter of Oddi (SO) of the Australian brush tailed possum were examined in 45 anaesthetized animals. CCK‐OP (20–640 ng/kg) consistently caused the GB to contract in a dose‐dependent manner (Kruskal WallisP<0.05). In 20 animals, the same dose range of CCK‐OP produced an excitatory response in the SO, increasing the SO motility index (MI = frequency of contractions x mean peak amplitude) dose‐dependently (Kruskal WallisP<0.05). In five animals, an inhibitory response, that is, a decrease in MI, was recorded, with 640 ng/kg of CCK‐OP producing a 50% decrease in MI. In the remaining 20 animals, variable responses of both excitation and inhibition were elicited within the same animal. The action of CCK‐OP on the SO and GB was not modified by atropine, phentolamine or propranolol. Tetrodotoxin (TTX) reversed the inhibitory responses of the SO to CCK‐OP such that responses were excitatory (sign testP<0.05). TTX did not alter the response of the GB to CCK‐OP. It is concluded that CCK‐OP acts directly on smooth muscle receptors of the GB. In the SO, its action is mediated via non‐cholinergic, non‐noradrenergic inhibitory neurons and also by a direct excitatory action on

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00853.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

ABSTRACTThe effect of increasing intravenous doses of synthetic salmon calcitonin (0.0044, 0.0088, 0.0175, and 0.0350 iu/kg per min) versus placebo on the fasted gall‐bladder volume was assessed in seven normal subjects according to a double‐blind study protocol. In addition, the action of calcitonin on meal‐induced gall‐bladder emptying was examined. Gall‐bladder volumes were measured by means of real‐time ultrasonography.Calcitonin evoked a dose‐dependent relaxation of the fasted gall‐bladder. A statistically significant increase of the fasted gall‐bladder volume was observed with 0.0175 (23.4 ± 5.5 cm3placebo versus 33.9 ± 7.7 cm3calcitonin,P<0.001) and 0.0350 (21.4 ± 4.6 cm3placebo versus 36.1 ± 8.4 cm3calcitonin,P<0.01) iu/kg per min calcitonin, whereas a mean increase of the gall‐bladder volume amounted to 32.1% and 46.5%, respectively. A significant delay of the gall‐bladder emptying after calcitonin was reflected by a decrease of the ejection fraction: 23.2 ± 8.3% calcitonin versus 57.8 ± 6.9% placebo (P<0.02) at 20 min, and 40.5 ± 8.8% calcitonin versus 67.2 ± 3.8% placebo (P<0.02) at 30 min after the test meal.Calcitonin is concluded to have a potent relaxing eff

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00854.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

ABSTRACTThe effects of infection of mice withLeishmania majoron liver microsomal protein and cytochrome P‐450 were examined. The levels of hepatic microsomal protein and cytochrome P‐450 were monitored at 6, 7, 9 and 12 weeks post‐infection. The results indicated that the amount of hepatic microsomal protein and cytochrome P‐450 were unchanged throughout the course of infection withL. major, despite the high degree of parasite proliferation in Kupffer cells and marked reduction in phagocytosis. The current results clearly indicate thatLeishmania‐induced macrophage suppression has no inhibitory effect on hepatic microsomal protein and cytochr

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00855.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

ABSTRACTOne hundred consecutive cases of hepatocellular carcinoma (HCC) in cirrhosis observed at autopsy were studied and their pathological aspects were compared with those reported in the literature. The results, which are representative of HCC epidemiology in a geographical area where cirrhosis is mostly due to alcohol abuse, show that similarities in the architectural pattern of HCC and weight of the liver exist between our material and samples with different aetiology and epidemiology. A relationship between the histological grade of HCC and its propensity to metastasize was demonstrated. The reported better prognosis of clear cellsper secould not be confirmed, although clear cell HCC occurred exclusively in grade 2. It was also demonstrated that the relationship between grading and staging was strongly influenced by the association of HCC with cirrhosis, which is a fact that is usually overlooked by the common staging (and grading) methods.

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00856.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

ABSTRACTThe present study aimed to assess relationships between plasma levels of atrial natriuretic peptide (ANP) and plasma volume, systemic vascular resistances, cardiac output and plasma renin activity in patients with cirrhosis. Thirty patients were included: eight with no history of liver disease were used as controls; 22 patients had biopsy‐proven alcoholic cirrhosis without ascites (n=11) and with ascites (n=11). Mean ANP plasma level was significantly higher in both groups of cirrhotic patients than in controls (P<0.05). In the control group, ANP and plasma renin activity were inversely correlated (P<0.05) but no correlation was found in cirrhotic patients. In the group of patients with ascites, ANP plasma levels were inversely correlated to plasma volume (P<0.05) and to cardiac output (P<0.01) and directly correlated to systemic vascular resistances (P<0.01). Using multiple regression analysis, ANP remained correlated only with systemic vascular resistances (P<0.05). These results suggest that cirrhotic patients have high plasma levels of ANP whether or not they have ascites. In the light of current knowledge of ANP actions, the relationships between ANP plasma levels and plasma volume, cardiac output, and systemic vascular resistances are paradoxical in cirrhotic patients with ascites. ANP does not seem to play a critical role in the pathogenesis of sodium and water retention observed in these patient

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00857.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

ABSTRACTHaem (FeII‐protoporphyrin‐IX) is presented to the gut lumen as haemoproteins derived from exogenous (dietary) and endogenous (mucosal cell desquamation and bleeding) sources. Haemoproteins such as haemoglobin, myoglobin and catalase undergo hydrolysis by luminal proteases to release the haem. Released haem is maintained in a soluble form in the gut lumen by the products of haemoprotein digestion. Chelators of elemental iron do not bind haem‐iron and so haem‐iron is better absorbed than elemental iron. Haem‐iron does not exchange with luminal elemental iron. Mucosal uptake of haem is limited. Less than 10% binds to the brush border of the villus cell. Although the mechanisms by which haem binds to the brush border and is transported to the intracellular environment are poorly understood, it is known that some haem is transferred to secondary lysosomes where the porphyrin ring is split to release iron and form bilirubin. Depending upon the composition of the diet, the iron released from haem within the villus cell can be the major physiological source of iron. In iron‐deficiency in humans, absorption of haem‐iron can increase threefold whereas absorption of elemental‐iron can increase tenfold. These observations indicate that haem‐iron and elemental‐iron are absorbed via different mechanisms which are subject to different regulation. For haem‐iron to be absorbed, the haem itself must be t

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00858.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00859.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00860.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

ABSTRACTA 15 year old Chinese girl presented with features of benign recurrent intrahepatic cholestasis, confirmed by liver biopsies performed during attack and remission. Her only younger brother also has features of this syndrome. Serial biochemistry monitoring during a recent attack demonstrated that a rise in the serum bile acids preceded the clinical onset of symptoms and the rise in serum bilirubin and ductal enzymes by 8 weeks. Whether this earlier rise in serum bile acids is related to the pathogenetic mechanism of this syndrome remains to be elucidated.

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00861.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

CORRECTION OF METABOLIC DEFECT BY GENE TRANSFER INTO ISOLATED HEPATOCYTESCorrection of the genetic defect in hepatocytes from the Watanabe heritable hyperlipidemic rabbit. Wilson J.M., Johnston D.E., Jefferson D.M.&Mulligan R.C.BIOCHEMICAL FEMINIZATION OF MALES WITH ALCOHOL‐INDUCED LIVER DISEASEEthanol‐induced increase in cytosolic estrogen receptors in human male liver: a possible explanation for biochemical feminization in chronic liver disease due to alcohol. Villa E., Baldini G.M., Rossini G.P.et al.PROPHYLACTIC SCLEROTHERAPYProphylactic sclerotherapy before the first episode of variceal hemorrhage in patients with cirrhosis. Sauerbruch T., Wotzka R., Kopcke W.et al.VARICEAL PRESSURE IN CIRRHOSISEndoscopic measurement of variceal pressure in cirrhosis: Correlation with portal pressure and variceal hemorrhage.Rigau J., Bosch J., Bordas J.M.et

ISSN:0815-9319    

DOI:10.1111/j.1440-1746.1989.tb00862.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY