Results 161 to 170 of about 4,548 (205)
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Prediction of the amount and rate of histamine degradation by diamine oxidase (DAO)
Food Chemistry, 2012Histamine is a biogenic amine that forms in a variety of foods and can cause food poisoning at high concentrations (>500 ppm). In situations where the formation of histamine in food cannot be prevented through refrigeration, diamine oxidase (DAO) enzyme may be used to degrade histamine to safe levels.
A, Naila +5 more
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Effect of Intestinal Diamine Oxidase (DAO) Depletion by Heparin on Mucosal Polyamine Metabolism
Digestion, 1990The aim of this study was to examine the relative importance of the enzymes ornithine decarboxylase (ODC) and diamine oxidase (DAO) in intestinal polyamine metabolism in normal rats. To study this we measured jejunal and ileal DAO and ODC activities and polyamine levels 2 h after injecting, in non-fasting male Wistar rats, either normal saline ...
T, Rokkas +4 more
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On the Elimination of Transfused Heparin‐Induced Diamine Oxidase (DAO) Activity in Rabbits
Acta Physiologica Scandinavica, 1973AbstractLymph or blood plasma, rich in diamine oxidase (DAO; EC 1.4.3.6.) activity was obtained from donor rabbits, after i.v. injection of heparin. The lymph or, after heparin neutralization, the blood serum was injected into recipient rabbits, and the elimination of the transfused DAO activity was studied.
R, Hansson, H, Thysell
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An improved spectrophotometric assay for histamine and diamine oxidase (DAO) activity
Agents and Actions, 1985Diamine oxidase or its substrates can be measured using a coupled reaction with peroxidase and the chromogen 3-methyl-2-benzothiazolone hydrazone (MBTH) with an appropriate acceptor such as 3-(dimethylamino)benzoic acid (DMAB). This method provides a more rapid and sensitive method of measuring histamine than current colorimetric assays; using this ...
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A FURTHER INVESTIGATION OF THE RELATIONSHIP BETWEEN SERUM DIAMINE OXIDASE (DAO) AND GESTATIONAL AGE
BJOG: An International Journal of Obstetrics & Gynaecology, 1976SummaryA standard error of one to two weeks must be accepted if the duration of pregnancy is calculated from serum diamine oxidase (DAO) concentrations. After the 16th week of pregnancy, the enzyme concentration is too variable to be used for calculations of gestational age.
J B, Jones, M, Kelly
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[Studies on diamine oxidase (DAO) activity in seminal plasma].
Hinyokika kiyo. Acta urologica Japonica, 1989Diamine oxidase (DAO: EC 1.4.3.6) activity was measured for seminal plasma of patients complaining of infertility to investigate whether measurement of DAO activity in seminal plasma is a significant laboratory examination or not for evaluation of male infertility.
Y, Uchijima +3 more
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Changes in serum and intestinal diamine oxidase (DAO) activity after proximal enterectomy in rats
Digestive Diseases and Sciences, 1989To determine whether serum and mucosal DAO activity reflects quantitative changes in the small bowel mucosal mass, we have chosen an experimental model of mucosal hyperplasia which is known to occur in the rat after enterectomy. A 50% proximal enterectomy or a single transection was performed in 20 growing rats weighing 145-160 g.
J P, Buts +3 more
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Biochemical Pharmacology, 1976
Abstract High diamine oxidase (DAO) and histamine activity are present in rat intestine, thymus and adrenals, and a close correlation exists between the two activities in these tissues ( Biochem. Pharmac. 24 , 979 (1975)). The distribution of histaminase in normal and germ-free rat tissues and the release of this enzyme from intestine, thymus and ...
R E, Shaff, M A, Beaven
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Abstract High diamine oxidase (DAO) and histamine activity are present in rat intestine, thymus and adrenals, and a close correlation exists between the two activities in these tissues ( Biochem. Pharmac. 24 , 979 (1975)). The distribution of histaminase in normal and germ-free rat tissues and the release of this enzyme from intestine, thymus and ...
R E, Shaff, M A, Beaven
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How reliable are DAO supplements? — A comparison of over-the-counter Diamine oxidase products
2023AbstractDiamine oxidase (DAO) supplements have gained increasing attention in recent years due to their potential to support DAO deficiency, histamine intolerance and related symptoms. However, choosing a reliable and trustworthy DAO supplement can be a challenging task for patients and Healthcare practitioners.
Marc Alemany-Fornes +4 more
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Some problems with the diamine oxidase (DAO) assay using putrescine as substrate in rat liver
Agents and Actions, 1993Determination of diamine oxidase (DAO) activity in rat liver preparations by measuring the formation of radioactive delta 1-pyrroline from 14C-putrescine is complicated by the complexity of competing metabolic pathways. This can lead to complete masking of the DAO activity present when rat liver homogenates are used as the enzyme source.
G, Ignesti +4 more
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