Previous studies on the fate of histamine in the mammalian organism have shown that the substance can be rapidly inactivated (l), although some free histamine may be excreted in the urine, the amount depending on the species (2). The disruption in v&o of the imidazole ring of histamine has not been established nor has an accounting been made of all administered histamine in terms of known metab...

The membrane-permeabilizing activities of mastoparans and related histamine-releasing agents were compared through measurements of K(+) efflux from bacteria, erythrocytes, and mast cells. Changes in bacterial cell viability, hemolysis, and histamine release, as well as in the shape of erythrocytes were also investigated. The compounds tested were mastoparans (HR1, a mastoparan from Polistes jad...

Zaman M.Z., Bakar F.A., Selamat J., Bakar J.. (2010): Occurrence of biogenic amines and amines degrading bacteria in fish sauce. Czech J. Food Sci., 28: 440–449. The contents of biogenic amines histamine, putrescine, and cadaverine in fish sauce were determined and the bacteria isolated from the samples were evaluated for their amines degradation activity. Five fish sauce samples contained 62.5...

Recent findings suggest that bacteria might contribute to histamine concentrations in the sputum of patients with infective lung disease. Ten isolates of Haemophilus influenzae from patients with acute exacerbation of chronic bronchitis and emphysema, together with two reference strains, were incubated at 37 degrees C for 72 hours. Serial estimations of histamine concentrations by high pressure...

The imaging of neurotransmitter receptors by positron emission tomography (PET) scanning is useful for assessing drug potency. We obtained two time series of PET images forming a time history of brain activity. In one time series, the subject was given a histamine blocker; no blocker was administered in the other. In both cases a radioligand was used for imaging. The images were input to an ada...

The recently stated hypothesis that histamine liberation by cotton dust extracts is caused by endotoxins from gram-negative bacteria contained in cotton was studied experimentally in various animals. It was shown clearly that such amounts of endotoxin as were found in cotton dust did not give rise to histamine liberation which was provoked by extracts from cotton card-room dusts. Further argume...