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Isolierte menschliche Magenschleimhautzellen — Untersuchungen physiologischer und pharmakologischer Regulationsmechanismen

Isolated cells from human gastric mucosa — studies on physiological and pharmacological regulation

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Summary

Cells were isolated by use of collagenase, EDTA and pronase form human gastric mucosa obtained at peptic ulcer surgery (n=61) or at Whipple's operations (n=6). Enriched parietal cell fractions were prepared by isopycnic centrifugation with Percoll. H+ production, intracellular instrinsic factor and histamine content were maximal in the low density fraction containing 75% parietal cells and — among other nonparietal cell types — mast cells. H+ production, intrinsic factor secretion and adenylate cyclase-activity responded to histamine stimulation in a concentration dependent manner. Response was blocked by histamine H2 receptor antagonists (rantidine, famotidine). Dibutyryl cAMP and the phosphodiesterase inhibitor IMX were the most powerful stimuli whereas carbachol, hexoprenaline and pentagastrin were less effective. Prostaglandin E2 and 6-keto-PGF occurred in the highest concentrations in the low density cell fraction. PG production increased linearly for 15 min and seemed to be influenced by the intracellular calcium level.

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Abbreviations

cAMP:

Adenosin-3',5'-cyclisches Monophosphat

EDTA:

Ethylen Diamin Tetraacetat

IMX:

3-Isobutyl-1-Methylxanthin

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Für diese Studie hat der Bundesminister für Jugend, Familie und Gesundheit den Forschungspreis zur Einschränkung und zum Ersatz von Tierversuchen zuerkannt. Die experimentellen Arbeiten wurden an der Medizinischen Poliklinik der Universität Bonn durchgeführt. Diese Studie wurde durch die Deutsche Forschungsgemeinschaft unterstützt. Wir danken B. Schiermeyer, R. Maier und W. Beer für ihre hervorragende Hilfe als Technische Assistenten

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Schepp, W., Miederer, S.E., Ruoff, H.J. et al. Isolierte menschliche Magenschleimhautzellen — Untersuchungen physiologischer und pharmakologischer Regulationsmechanismen. Klin Wochenschr 64, 15–22 (1986). https://doi.org/10.1007/BF01721576

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  • DOI: https://doi.org/10.1007/BF01721576

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