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background: radioprotective capability of histamine h2 receptor antagonists have been shown in several in vivo studies mainly using animal models. however, to verify the effectiveness of these agents in clinical applications, studies should be performed on human cells. in the present study radioprotective properties of these agents was examined in vitro on human lymphocytes using metaphase anal...

BACKGROUND It is unknown whether proton pump inhibitors are superior to H2-receptor antagonists in Helicobacter pylori eradication regimens. AIM To perform a meta-analysis comparing the efficacy of both antisecretors when co-prescribed with antibiotics. METHODS Randomized clinical trials comparing proton pump inhibitors vs. H2-receptor antagonists with the same antibiotics were selected. Da...

objective: the nucleus accumbens (nac) receive histaminergic neurons from tuberomammillary nuclei. there are reports indicating that central histamine systems are involved in many physiological behavioral processes, including anxiety. the aim of the present study was to assess whether the histaminergic system of the nac is involved in anxiety-related behaviors. methods:   rats   were   anesthet...

A study was conducted to see whether patients with duodenal ulcers that failed to heal in response to H2 receptor antagonists had a higher incidence of recurrent ulceration after highly selective vagotomy than patients whose ulcers healed with these drugs. Between 1977 and 1983, 157 patients had a highly selective vagotomy for uncomplicated duodenal ulcer; in 57 patients the ulcer had failed to...

Histamine H2 receptors transfected in Chinese hamster ovary (CHO) cells are time- and dose-dependently upregulated upon exposure to the H2 antagonists cimetidine and ranitidine. This effect appears to be H2 receptor-mediated as no change in receptor density was observed after H1 or H3 antagonist treatment or after incubation with the structural analogue of cimetidine, VUF 8299, which has no H2 ...

Using specific histamine H1 and H2 receptor antagonists, evidence is presented for the existence of both H1 and H2 receptors on human articular chondrocytes in vitro. Stimulation of the H1 receptor by histamine (range 0.18 to 17.8 mumol/l) significantly increased prostaglandin E (PGE) production, while activation of the histamine H2 receptor increased intracellular cyclic adenosine-5'-monophosp...