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Misoprostol is used for the prevention of NSAID-induced gastric ulcers.It acts upon gastric parietal cells, inhibiting the secretion of gastric acid by G-protein coupled receptor-mediated inhibition of adenylate cyclase, which leads to decreased intracellular cyclic AMP levels and decreased proton pump activity at the apical surface of the parietal cell.
Hyperplasia of parietal cells causes an abnormal release of HCl into the duodenum, which causes the ulcers of the duodenum. Excessive HCl production also causes hyperperistalsis, [ 14 ] a condition marked by excessive rapidity of the passage of food through the stomach and intestine and inhibits the activity of lipase , causing severe fatty ...
Choriocarcinoma is a malignant, trophoblastic [1] cancer, usually of the placenta. It is characterized by early hematogenous spread to the lungs. It belongs to the malignant end of the spectrum in gestational trophoblastic disease (GTD). It is also classified as a germ cell tumor and may arise in the testis or ovary.
The syndrome is caused by the formation of a gastrinoma, a neuroendocrine tumor that secretes a hormone called gastrin. [2] High levels of gastrin in the blood (hypergastrinemia) trigger the parietal cells of the stomach to release excess gastric acid. The excess gastric acid causes peptic ulcer disease and distal ulcers.
These new agents can in a reversible and competitive fashion inhibit the final step in the gastric acid secretion with respect to K + binding to the parietal cell gastric H + /K + ATPase. That is, they block the action of the H + /K + ATPase by binding to or near the site of the K + channel. Since the binding is competitive and reversible these ...
When the polyps are biopsied, the pathology typically shows shortened gastric pits, and both superficial and deep cystic lesions in the fundic glands, lined by all three types of cells of acid-producing mucosa: mucous, parietal and chief cells. As sometimes parietal cell hyperplasia may develop deep dilations of gland, [5] one should be really ...
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The tumor is caused when the germ cells in the ovaries begin divide uncontrollably and become malignant which are characterized with their less organized nuclei and unclearly defined border. [1] Another potential etiology is the dysfunctioning of the tumor suppressor gene , TRC8/RNF139, or even karyotypic abnormalities after close molecular ...