Sökning: (L773:0044 0086)
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Histamine metabolis...
Histamine metabolism of gastric carcinoids in Mastomys natalensis.
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- Kölby, Lars, 1963 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för kirurgi,Institute of Surgical Sciences, Department of Surgery
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- Wängberg, Bo, 1953 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för kirurgi,Institute of Surgical Sciences, Department of Surgery
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- Ahlman, Håkan, 1947 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för kirurgi,Institute of Surgical Sciences, Department of Surgery
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visa fler...
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Modlin, I M (författare)
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- Nilsson, Ola, 1957 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för kirurgi,Institute of Surgical Sciences, Department of Surgery
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visa färre...
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(creator_code:org_t)
- 1998
- 1998
- Engelska.
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Ingår i: The Yale journal of biology and medicine. - 0044-0086. ; 71:3-4, s. 207-15
- Relaterad länk:
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https://gup.ub.gu.se...
Abstract
Ämnesord
Stäng
- Pharmacological inhibition of gastric acid secretion and subsequent hypergastrinemia in Mastomys natalensis is an experimental model well suited for the study of gastric carcinoid formation. The genetic susceptibility of Mastomys to develop such tumors is a feature reminiscent of the situation in patients with the MEN-1 Zollinger Ellison syndrome, in whom tumor-induced hypergastrinemia, promotes the development of gastric carcinoids. Chronic hypergastrinemia, induced by the irreversible H2-receptor antagonist loxtidine will cause carcinoid formation in Mastomys already after four to six months. As in humans, gastric carcinoids in Mastomys are mainly composed of enterochromaffinlike (ECL) cells and have low malignant potential. Administration of exogenous gastrin to normal young animals increases the expression of histidine decarboxylase (HDC) mRNA in the oxyntic mucosa within 30 minutes. Endogenous hypergastrinemia, induced by short-time loxtidine treatment (three to 29 days) enhances the expression of HDC mRNA, histamine contents and ECL cell numbers in the oxyntic mucosa. Long-term loxtidine treatment (seven to 21 months) results in sustained hypergastrinemia and tumor formation. Tumor-bearing animals exhibited an increase in HDC mRNA and histamine content in the oxyntic mucosa as well as increased urinary excretion of the main histamine metabolite, tele-methylimidazole acetic acid (MeImAA). Subsequent to cessation of loxtidine treatment for two weeks, all parameters of histamine metabolism were normalized in tumor-bearing animals. These results indicate that gastric carcinoids developing during hypergastrinemia are well-differentiated neoplasms whose histamine synthesis and metabolism is regulated by plasma gastrin.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Endokrinologi och diabetes (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Endocrinology and Diabetes (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cancer and Oncology (hsv//eng)
Nyckelord
- Animals
- Carcinoid Tumor
- chemically induced
- metabolism
- Disease Models
- Animal
- Enterochromaffin-like Cells
- metabolism
- pathology
- Gastric Mucosa
- drug effects
- enzymology
- Gastrins
- adverse effects
- blood
- Histamine
- metabolism
- Histamine H2 Antagonists
- pharmacology
- Histidine Decarboxylase
- drug effects
- genetics
- Muridae
- Stomach Neoplasms
- chemically induced
- metabolism
- Triazoles
- pharmacology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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