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  • 1985-1989  (11)
Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 13 (1986), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The effects of a synthesized phosphodiesterase inhibitor, ZSY-27, on the secretion of pancreatic juice were investigated in dog isolated and blood-perfused pancreas, and compared with those of secretin and dopamine.2. Intravenous administration of ZSY-27 (0.3-1 mg/kg) elicited increases in pancreatic secretion. Intra-arterial (i.a.) administration of ZSY-27 (0.1-1 mg) also elicited increased secretion. The secretory activity of ZSY-27 (1 mg) was approximately equal to that of 0.1 units of secretin and 2.5 μg of dopamine.3. The concentration of bicarbonate in the pancreatic juice induced by ZSY-27 i.a. was increased, but the protein concentration was not increased significantly. These effects are analogous to those of secretin and dopamine.4. ZSY-27-induced pancreatic secretion was not modified by pretreatment with phentolamine, propranolol, atropine, sulpiride and cimetidine.5. Secretin-induced secretion was significantly potentiated by infusion of ZSY-27 (25 μg/min) but dopamine-induced one was not.6. These results suggest that ZSY-27 increases pancreatic secretion acting directly on the ductular cells of the dog pancreas, at least in part, through the increase of intra-cellular cyclic AMP concentration by inhibiting phosphodiesterase activity.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 12 (1985), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The effects of secretin, cholecystokinin, dopamine, histamine and acetylcholine on the secretion of pancreatic juice were investigated in the monkey and the dog.2. In the resting state, bicarbonate concentration and the volume of pancreatic juice in the monkey were greater than those in the dog. However, the protein concentration of pancreatic juice in the monkey was less than that in the dog.3. Intravenous administration of secretin, cholecystokinin, histamine and acetylcholine caused a dose dependent increase in pancreatic secretion in both species. The responses in the monkey were greater than those in the dog. Dopamine caused pancreatic secretion only in the dog.4. The increase in bicarbonate concentrations of pancreatic juice induced by secretin and histamine in the monkey were greater than that in the dog. Increase in protein concentrations of the juice induced by cholecystokinin and acetylcholine in the monkey were less than that in the dog. However, pancreatic juice pH in both species was the same and was not affected by the secretagogues in the resting state or during the stimulation by secretogogues.5. From these results, it is concluded that there is a species difference in the secretory actions of the secretagogues in the monkey and the dog.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 13 (1986), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The effects of adenosine, adenosine 5′-triphosphate (ATP) and inosine on pancreatic exocrine secretion were investigated in the vascularly isolated and self-hacmoperfused dog pancreas. Drugs were injected close-arterially (i.a.) in a single bolus.2. These three purine-related compounds per se did not affect resting rate of pancreatic secretion and the concentrations of protein and bicarbonate in the resting juice.3. Graded doses of adenosine (0.1–1.0 mg, i.a.) and ATP (0.1–1.0 mg, i.a.) administered 1 min prior to secretin (0.025 clinical units, i.a.) increased a secretin-stimulated secretory volume dose-dependently, and the effects of adenosine and ATP were reversed by pretreatments with theophylline (0.3 mg, i.a.).4. Insoine (1.0 mg, i.a.) affected neither secretin- nor dopamine-stimulated (3 μg, i.a.) pancreatic secretion. Adenosine and ATP did not affect dopamine-stimulated pancreatic secretion.5. These results suggest that adenosine and ATP (or terminal phosphate hydrolyzed derivatives) enhance secretin-stimulated pancreatic exocrine secretion through ‘P1’ purine receptors in the exocrine cells, without conversion to inosine.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 16 (1989), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The effects of ouabain and acetazolamide on the secretion of pancreatic juice stimulated by secretin in anaesthetized dogs were investigated.2. Intra-arterial injection of ouabain (1–10 μg) and acetazolamide (1–10 mg) caused dose-dependent decreases in the volume of pancreatic juice. When both drugs were added together, the inhibitory effects were significantly higher than for each drug alone.3. The bicarbonate concentration in the pancreatic juice was decreased and the chloride concentration was increased by ouabain and acetazolamide, but sodium and protein concentrations were not modified.4. The results suggest that the Na+K+-ATPase and carbonic anhydrase activities play important roles in water and electrolyte secretion, and that ouabain and acetazolamide inhibit secretin-stimulated pancreatic secretion by acting on different systems in the exocrine cells in dogs.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 12 (1985), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The effects of metoclopramide on pancreatic exocrine secretion were investigated in the pentobarbitone-anaesthetized dog. All drugs were injected into the femoral vein.2. Metoclopramide (10–1000 μg/kg) did not change the resting rate of pancreatic secretion.3. Pancreatic secretion, induced by bethanechol (3 μg/kg), was dose-dependently enhanced by simultaneous injections of metoclopramide (10 and 30 μg/kg), but the protein and bicarbonate concentrations of the pancreatic juice were not affected. Secretions induced by secretin (0.1 units/kg) and dopamine (3 μg/kg) were not modified by metoclopramide at up to 30 μg/kg.4. A larger dose of metoclopramide (1000 μg/kg) suppressed dopamine-induced secretion to a lesser extent than the same dose of sulpiride.5. From these results, it is concluded that metoclopramide enhances secretory responses to cholinergic stimulations by peripherally sensitizing the muscarinic receptor-mediated exocrine process and this drug is a weaker antagonist of the dopamine D2 receptors than sulpiride.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 13 (1986), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. The effect of substance P (SP) on pancreatic exocrine responses to exogenous cholecystokinin, secretin, and dopamine, were studied in the isolated and blood-perfused pancreas of dogs.2. Intra-arterial injection of SP had a significant biphasic effect on pancreatic secretion: an initial transient inhibition, followed by an increase in the secretion stimulated by the infusion of cholecystokinin. However, SP caused only an inhibition of secretion stimulated by the infusion of secretin and dopamine.3. SP increased protein concentration but not bicarbonate concentration in juice stimulated by cholecystokinin, but SP did not affect significantly either protein or bicarbonate concentrations in juice stimulated by secretin and dopamine.4. These results suggest that SP has greater effects on the pancreatic secretion stimulated by cholecystokinin than that stimulated by secretin and dopamine.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental pharmacology and physiology 14 (1987), S. 0 
    ISSN: 1440-1681
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: 1. Effects of intravenous injections of ZSY-27, a synthesized phosphodiesterase inhibitor, on pancreatic exocrine secretion and on pancreatic cyclic AMP and cyclic GMP concentrations of dogs were investigated.2. ZSY-27 (0.3 and 1 mg/kg) increased cyclic AMP concentration dose-dependently, which preceded the increase in pancreatic secretion but did not affect cyclic GMP concentration.3. These results suggest that ZSY-27 causes exocrine secretion from the dog pancreas mediated through an increase in intracellular cyclic AMP concentration.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 119 (1988), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 115 (1986), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 112 (1985), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Alterations of binding capacity of surface IgG-Fc and complement receptors were demonstrated in polymorphonuclear neutrophils (PMNs) obtained from the pustular lesions of psoriasis. A marked decrease of C3 receptors, but not of IgG-Fc, was found in PMNs from the lesions of palmo-plantar pustulosis (PPP) and bacterial pustules. PMNs from pustular lesions of psoriasis exhibited only a slight decrease in the number of C3 receptors. No significant decrease in membrane receptors was noted in circulating PMNs from psoriatic patients. We suggest that mechanisms of formation of aseptic subcorneal pustules, mediated by PMN membrane receptors for C3 fragments, are different in pustular psoriasis and PPP.
    Type of Medium: Electronic Resource
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