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  • 1
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Conclusion No correlation between histamine content of corpus mucosa and maximum response to pentagastrin existed in normal human subjects and in patients suffering from gastric diseases. Normal histamine concentrations were found in duodenal ulcer patients who did not show any reduction in acid output despite complete vagotomy. A relatively low mucosal histamine content was determined in a patient with proven Zollinger-Ellison syndrome. However one year after complete selective-gastric vagotomy the corpus mucosal histamine concentrations were considerably increased. This is the first case in the literature that the histamine content of the human gastric mucosa was altered.
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  • 2
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In 9 dogs, whose maximum gastric acid response to pentagastrin was evoked by 6 μg/kg, the total gastric secretion as well as the peak gastric secretion was enhanced by amodiaquine. The optimum dose of this antimalarial drug was 2 mg/kg, whereas 0.25 mg/kg were without effect and 3 mg/kg reduced already the augmentation of gastric secretion by this substance. The increase in acid output by amodiaquine was greater than that in volume. The total secretion was more enhanced than the peak secretion, which means a longer duration of the amodiaquine potentiated gastric secretion elicited by pentagastrin, than that without application of amodiaquine contrary to that stimulated by exogenous histamine. Amodiaquine itself did not stimulate gastric acid secretion, in contrast to prostigmine and carbachol. Thus amodiaquine seemed not to enhance gastric secretion by a direct or indirect parasympathomimetic action. The question whether amodiaquine acted on gastric secretion in a specific way and not by parasympathomimetic effects, led to investigations in several exocrine glands. In salivary glands, amodiaquine did neither stimulate the secretion in all doses investigated nor did it enhance the pilocarpine and acetylcholine induced salivation with any significance and regularity. Also the pancreatic and biliary secretion was neither stimulated by amodiaquine nor was the secretin induced secretion of the pancreas and liver augmented by amodiaquine. Thus the enhancing effect of this drug on the histamine and pentagastrin stimulated gastric secretion was very likely specific for the gastric mucosa and not due to a parasympathomimetic action of the drug. In contrast to the findings in various exocrine glands of the gastrointestinal tract, the arterial hypotension following the i.v. injection of acetylcholine was increased specifically by a preceeding i.v. injection of amodiaquine, whereas the equi-effective actions of histamine, serotonin and bradykinin as well as the hypertension by epinephrine and norepinephrine were not influenced by amodiaquine. This specific effect of the antimalarial drug very probably was not caused by an inhibition of the unspecific choline esterase in the blood. Since in exocrine glands no evidence could be found for a parasympathomimetic action or other modes of action of amodiaquine, it seemed probable that amodiaquine potentiated the histamine and pentagastrin stimulated gastric secretion by an inhibition of histamine methyltransferase in vivo.
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  • 3
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Histamine methyltransferase (HMT) activity was determined by a modified isotope assay in biopsy specimens from gastric mucosa of control subjects, duodenal ulcer patients and after various gastric operations. Enzymic activity of male control subjects who were ‘healthy’ with respect to their upper gastrointestinal tract was 70.4±12.8 pmol/(min×mg protein). In male duodenal ulcer patients HMT-activity was significantly lowered by 15%; following selective vagotomy with pyloroplasty a significant increase of 14% was observed as compared to controls. The difference between values before (59.9±13.3) and after (80.4±11.7) this operation was highly significant (p〈0.001). Experiments in a small number of patients showed that after other modifications of vagotomy elevated HMT-activities were also found, whereas after resection procedures such changes of enzymic activity did not occur. According to these results the low gastric HMT-activity of duodenal ulcer patients could play a role in the pathogenesis of a chronic peptic ulcer by being responsible for reduced histamine inactivation and — as a consequence —enhanced acid secretion. Furthermore, vagotomy seemed to influence acid secretion in human subjects not only by direct effects on the parietal cells, but also by an activation of histamine catabolism. One patient, who despite complete vagotomy showed both no reduction in acid secretion and a low gastric HMT-activity, may be the representative of a new population of peptic ulcer patients.
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  • 4
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Histamine assays can be unreliable in individual subjects or samples even though the particular method is in general working very well. Therefore the specificity and accuracy of histamine determination in the gastric aspirate of individual duodenal ulcer patients was thoroughly examined and shown to be satisfactory. Pitfalls of the fluorometric assay were investigated. A native (non-histamine) fluorescence in gastric aspirate which occurs before the addition of OPT was not removed by the original Shore procedure. In the combined assay (Dowex 50+ butanol extraction) this fluorescence no longer interferes with the assay. For the identification of histamine in a single gastric aspirate of an individual duodenal ulcer patient, the reversed blank (3M HCl added to the reaction mixture before OPT instead after OPT), excitation and fluorescence spectra, the heating test with spectra recorded and the HMT test were found to be reliable. The formaldehyde test and the heating test without recording the spectra were useless since they gave false negative results. Since the HMT test was regarded as a reference method it was thoroughly investigated both by theoretical considerations (enzyme kinetics) and by a series of measurements in a single patient as well as in a group of nine subjects. Samples from the period of peak acid output in response to pentagastrin showed an average histamine concentration of about 8 ng/ml and a histamine output of 1.5 μg/30 min.
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  • 5
    ISSN: 1420-908X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract From a methodological point of view the relevance of clinical-biochemical trials depends on the answers to mainly four complexes of questions: (1) the reliability of the assays in the clinical situation to be tested, (2) the precision and accuracy of sample-taking, (3) the qualification of the design and the protocols in the clinical part of the trial and (4) the usefulness of the time concepts in the trial concerning biorhythms, seasonal influences, psychological trauma of diagnostic procedures and treatment. In this study mainly the second complex of questions was studied intensely. The precision of the fluorometric histamine assay in biopsy specimens from human gastric mucosa depended on several conditions: Biochemical technique, sample preparation and removal of biopsies from gastric mucosa via endoscopy. The CV% of the whole procedure was about 8-times higher than that of the biochemical technique. In clinical-biochemical studies on the significance of histamine or any other hormone (such as gastrin) in any disease (such as duodenal ulcer) it seems therefore useless to describe the precision of an assay only by the variance of the biochemical technique. Calculation of the histamine content as mean of 3 samples reduced the CV% from 27.2 to 14.9% and should therefore be recommended. The accuracy of the fluorometric histamine assay in biopsy specimens has been tested by several methods recommended by the IFCC and was found to be satisfactory. Conflicing results in the literature concerning the histamine content of human gastric mucosa could be explained on a methodological basis.
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  • 6
    ISSN: 1432-1440
    Keywords: Prospective study ; selective vagotomy ; pyloroplasty ; antrectomy (BI or BII) ; choice of surgical treatment ; secretory tests ; Prospektive Studie ; selektive Vagotomie ; Pyloroplastik ; Antrektomie (BI oder BII) ; Operationsauswahl ; Sekretionsteste
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Eine prospektive, kontrollierte Studie über eine standardisierte Operationsauswahl und Operationstechnik der selektiven Vagotomie wurde an 65 Patienten mit kompliziertem und unkompliziertem chronischem Duodenalulcus durchgeführt. Operationstechnik, Ziel, Vorbereitung und Durchführung der Studie, Operateure und Nachuntersucher, Patientenauswahl und die Methoden der Nachuntersuchung werden im Detail beschrieben. In einem Zeitraum von 6–12 Monaten postoperativ wurden 60 Patienten nachuntersucht, 4 Patienten waren verstorben, 1 Patient nicht auffindbar. Die operative Letalität betrug 0%, intra- und postoperative Komplikationen wurden bei 2 bzw. 15% der Patienten beobachtet, 2 Rezidive wurden festgestellt. Das klinische Allgemeinbefinden war bei 85% der Patienten gut, bei 93% befriedigend. Leichte Diarrhoen wurden bei 8%, schwere in keinem Fall beobachtet. Dumping trat dagegen in 30% der Fälle auf, war aber immer nur geringfügig. Positive Insulinteste nach verschärften Hollander-Kriterien wurden in 27% der Fälle gefunden. Die Basalsekretion wurde um 83–98% reduziert, die mit Pentagastrin maximal stimulierte Sekretion um 51% nach Vagotomie und Pyloroplastik, um 87% nach Vagotomie und distaler Antrektomie (BI) und um 95% nach Vagotomie und Antrektomie (BII). Die vorgelegte prospektive Studie stellt den ersten Teil einer Untersuchung dar, die zur Beurteilung verschiedener Vagotomieformen in der chirurgischen Therapie des chronischen Duodenalulcus herangezogen werden soll. Die Frühergebnisse dieser Studie rechtfertigen aber vorläufig die Empfehlung einer individuellen Anwendung der selektiven Vagotomie in Kombination mit Drainageoperation oder Antrektomie.
    Notes: Summary A prospective, controlled study on a standardized selection procedure of patients for the surgical treatment and on a standardized operation technique of selective vagotomy was carried out with 65 patients suffering from chronical uncomplicated or complicated duodenal ulcer. The operation technique, the aim, preparation and performance of the study, the designation of operators and investigators for the follow-up, the selection of patients for surgical treatment as well as the methods for measuring pre- and postoperatively various clinical and clinical chemical parameters are described in detail. The first follow-up was performed 6 to 12 months following surgical treatment in 60 patients. 4 patients died in the meantime, 1 patient could not be controlled because of an unknown new address. The operative mortality was 0%, intraoperative and postoperative complications were observed in 2 and 15% of the patients, whereas recurrent ulcers were found in 2 cases. The overall assessment of the clinical condition according to a modified classification of Visick was good in 85% and satisfactory in 93% of the patients. Mild diarrhoea was observed in 8%, severe diarrhoea in none and mild dumping in 30% of the patients. Positive insulin tests according to the criteria of Hollander were observed in 27% of the cases, but only in 7% were there early positive tests according to Ross and Kay. Depending on the drainage procedure, the basal secretion was reduced by 83–98%, the pentagastrin stimulated maximum secretion by 51–95%. This prospective controlled study was a preliminary investigation completed by another trial, in which two operative techniques for the treatment of chronical duodenal ulcer will be compared. The early results of our study, however, are in favour of the concept of an individually adapted treatment with selective vagotomy in duodenal ulcer.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 51 (1973), S. 475-476 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 55 (1977), S. 925-932 
    ISSN: 1432-1440
    Keywords: Systematische Kontrolluntersuchung ; Unregelmäßige Nachuntersuchung ; Ulcus duodeni ; Vagotomie ; theoretischer Chirurg ; Rundtischgespräch ; Systematic follow-up ; irregular medical check-up ; duodenal ulcer ; vagotomy ; theoretical surgeon ; panel discussion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary For patients with chronic duodenal ulcer a systematic follow-up concept has been developed in several medical centers. Defined attributes and parameters are assessed in each of the patients before, and at several intervals after, operation. The necessity of such a follow-up can be defended on several grounds and by its organisational structure it can be differentiated from a simple and irregular medical check-up after operation. It provides a more rational basis for treating a patient than the “experience” made up by impressions. The question of logistics in such a gastric follow-up contains many subquestions which may be answered differently in different locations but have still to be tested by controlled clinical trials. All these considerations however have the common aim to assess clinical data more reliably and with less personal bias than before. A concept for the evaluation of operative results in duodenal ulcer patients as has been started in Marburg is presented. Findings are obtained by a series of standardized interviews and examinations. Diagnoses, indications for operation and results of operation are established by a final decision made by a panel. A role for a theoretical surgeon in the follow-up is proposed. The possibility of performing a gastric follow-up is advocated both for University and district hospitals.
    Notes: Zusammenfassung In einigen gastroenterologischen Zentren wurde für Patienten mit chronischem Ulcus duodeni das Konzept einer systematischen Kontrolluntersuchung entwickelt, bei der definierte Merkmale und Parameter vor und in bestimmten zeitlichen Intervallen nach der Operation erhoben wurden. Ihre Notwendigkeit läßt sich mit zahlreichen Argumenten beweisen und ihre Organisationsstruktur muß sorgfältig von einer unregelmäßig nach der Operation stattfindenden Nachuntersuchung unterschieden werden. Die systematische Kontrolluntersuchung liefert eine logische Grundlage für die Behandlung von Patienten, die nicht auf Erfahrungen aus persönhchen Eindrücken beruht. Die Technik bei Erhebung von Befunden in einer solchen systematischen Kontrolluntersuchung wirft viele Teilfragen auf, die in verschiedenen Zentren unterschiedlich beantwortet werden können, auf jeden Fall aber durch kontrollierte klinische Studien getestet werden müssen. Alle diese Bemühungen haben aber das Ziel, klinische Daten mit größerer Zuverlässigkeit und mit weniger persönlichem Vorurteil zu ermitteln als bisher. Es wird ein Konzept für die Erhebung von Operationsresultaten bei Patienten mit chronischem Ulcus duodeni dargestellt, wie es in Marburg durchgeführt wird. Die Befunde werden durch eine Serie von standardisierten Interviews und Untersuchungen erhoben. Die Diagnose, Indikation für die Operation und das Operationsresultat werden abschließend durch ein Rundtischgespräch von Experten ermittelt. Welche Rolle der theoretische Chirurg bei der systematischen Kontrolluntersuchung übernehmen kann, wird dargestellt. Schließlich wird die Anwendung dieses Prinzips sowohl für die Universitätskliniken als auch für Stadt-und Kreiskrankenhäuser empfohlen.
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  • 9
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die dem APUD-Zellsystem (Pearse, 1968) zugehörigen endokrinen Zellen des Magens wurden nach Darstellung mit bestimmten cytochemischen Referenzreaktionen und nach numerischer Erfassung durch vergleichende Untersuchungen identifiziert (Operationsmaterial von 22 Patienten, Biopsiematerial von 14 Patienten). Dabei zeigten nicht alle zur Verfügung stehenden Referenzreaktionen aus methodischen Gründen eine für die numerische Erfassung ausreichende Verläßlichkeit. Jeder differenzierbare Zelltyp wurde auf seine mögliche Beziehung zur Funktion der Magenschleimhaut (H+-Sekretion, Parietalzellzahl) untersucht, außerdem das Verhalten dieser Zellen unter normalen und pathologischen Bedingungen (Hypersekretion und Hyposekretion) geprüft. Folgende Ergebnisse wurden gewonnen: 1. 2 endokrine Zelltypen sind am Magen statistisch sicherbar zu unterscheiden: die argentaffinen EC-Zellen und die argyrophilen G (= Gastrin)-Zellen. Darüberhinaus deuten die numerischen Befunde auf einen dritten endokrinen Zelltyp hin. Die Abgrenzung der cytochemisch durch die maskierte Metachromasie gekennzeichneten sog. D-Zellen als eigenständigen Zelltyp läßt sich wegen der Flüchtigkeit des Reaktionsausfalls mit statistischen Methoden nicht überprüfen. 2. Die G-Zellzahl ist bei Hyposekretion infolge chronisch atrophischer Gastritis vermindert, bei Hypersekretion ist sie vermehrt. 3. Zwischen Parietalzellorgan und H+-Sekretion einerseits und argyrophilen G-Zellen andererseits bestehen konstante gleichsinnige logarithmische Beziehungen. 4. Von diesen Befunden abweichend fanden sich bei 2 Patienten mit hochgradiger chronisch-atrophischer Gastritis und Schleimhautmetaplasie sowie mit einer Linitis plastica stark erhöhte G-Zellzahlen. Dieser Befund ist von Bedeutung im Hinblick auf die erhöhten Gastrinspiegel bei Perniciöser Anämie mit totaler Schleimhautatrophie und stimmt mit Befunden von Bussolati u. Pearse überein (1970), nach denen die G-Zellen unter den besonderen Bedingungen der Perniciosa trotz der Schleimhautatrophie vermehrt sind.
    Notes: Summary The endocrine cells of the stomach in man were studied cytochemically. Suitable marker-reactions were selected for numerical evaluation in order to differentiate the cells. The identity of the endocrine cells which were marked by the various reactions was checked by statistical evaluation. The different identified cells were then investigated for a possible numerical relationship with the number of parietal cells and with the H+ output (PAO). Three conditions were studied and compared: the hypersecretory state associated with duodenal ulcer, the stomach with a normal secretion and the hyposecretory state in chronic atrophic gastritis. The gastric tissue investigated was obtained from 30 patients at operation or by biopsy. Results: 1. Two endocrine cell types could be identified only using the methods described, the argentaffine EC-cells and the argyrophil G (= gastrin) cells. The identity of the so called D-cell as a separate “endocrine” cell which is characterized cytochemically by masked metachromasia could not be checked in this analysis due to rapid vanishing of the cytochemical reactions available. However, the numerical data point versus an additional third cell type. 2. The number of G-cells is increased in conditions with hypersecretion. It is decreased in hyposecretion due to chronic atrophic gastritis. 3. A constant positive logarithmic relationship exists between H+-secretion and number of parietal cells on the one hand und number of G-cells on the other hand. 4. In two patients with severe chronic atrophic gastritis and intestinalization of the atrophic mucosa and with a linitis plastica quite different observations were made: the number of G-cells was markedly increased. This finding correlates with the reports of an increased gastrin level in pernicious anemia in the literature, and also with the observation of Bussolati and Pearse (1970) according to which, in this disease, the G-cells may be increased despite mucosal atrophy.
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  • 10
    ISSN: 1432-1440
    Keywords: Histamingehalt ; Magenschleimhaut ; Ulkus duodeni ; Gastrointestinale Erkrankungen ; Histaminfreisetzung ; Histamine content ; Gastric mucosa ; Duodenal ulcer ; Gastrointestinal disease ; Histamine release
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In a prospective study the histamine content of the mucosa of the body of the stomach was measured in 100 patients consisting of control subjects, patients with duodenal ulcer and patients suffering from various gastrointestinal diseases. The histamine content was found to be 43 µg/g in male control subjects (median) while in duodenal ulcer patients levels attained were significantly lower by about 30 per cent. In all the other groups of patients histamine concentrations in gastric mucosa were found to be “normal”. Since in most species it is extremely difficult to alter the mucosal histamine concentration by any form of treatment, the diminished histamine content of the gastric mucosa in patients with duodenal ulcer seems remarkable. Among several possible explanations offered for this finding we think the most likely is that histamine release is increased in duodenal ulcer disease.
    Notes: Zusammenfassung In einer prospektiven Studie wurde der Histamingehalt der Korpusschleimhaut bei 100 Patienten gemessen. Diese Patienten schließen Kontrollpersonen, Ulkus-duodeni-Träger und solche mit verschiedenen gastrointestinalen Erkrankungen ein. Der Histamingehalt betrug 43 µg/g bei Kontrollpersonen und war bei Ulkus-duodeni-Kranken signifikant um 30% erniedrigt. Alle anderen Patientengruppen wiesen „normale“ Histamingehalte in der Magenschleimhaut auf. Da es bei allen Säugerarten mit Ausnahme der Ratte äußerst schwierig ist, den Histamingehalt der Magenschleimhaut durch irgendeine Maßnahme zu verändern, erscheint die Abnahme des Histamingehaltes der Korpusschleimhaut beim Ulkus duodeni besonders bemerkenswert. Unter verschiedenen Hypothesen gilt als wahrscheinlichste eine vermehrte Histaminfreisetzung beim chronischen Ulkus duodeni.
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