Brain Activation by Histamine Prick Test-Induced Itch
نویسندگان
چکیده
منابع مشابه
A tale of two itches. Common features and notable differences in brain activation evoked by cowhage and histamine induced itch
Previous PET and fMRI brain imaging studies targeting neural networks processing itch sensation have used histamine as the sole itch inducer. In contrast with histamine, cowhage-induced itch is mediated via proteinase activated receptors PAR2 and is transmitted through a separate spinothalamic pathway, therefore imaging the brain activation evoked by cowhage could provide further insight into c...
متن کاملCowhage-Induced Itch as an Experimental Model for Pruritus. A Comparative Study with Histamine-Induced Itch
BACKGROUND Histamine is the prototypical pruritogen used in experimental itch induction. However, in most chronic pruritic diseases, itch is not predominantly mediated by histamine. Cowhage-induced itch, on the other hand, seems more characteristic of itch occurring in chronic pruritic diseases. OBJECTIVES We tested the validity of cowhage as an itch-inducing agent by contrasting it with the ...
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Background. Histamine intolerance results from an imbalance between histamine intake and degradation. In healthy persons, dietary histamine can be sufficiently metabolized by amine oxidases, whereas persons with low amine oxidase activity are at risk of histamine toxicity. Diamine oxidase (DAO) is the key enzyme in degradation. Histamine elicits a wide range of effects. Histamine intolerance di...
متن کاملAllergen skin prick test should be adjusted by the histamine reactivity.
BACKGROUND Skin prick test results are mostly reported as mean wheal diameter obtained with one concentration of allergen. Differences in technique between personnel causes variation in wheal size. The research question was whether the influence of differences in skin prick test technique among assistants and centers can be reduced by relating the allergen wheal response to that of histamine. ...
متن کاملElectrical ear acupuncture reduces histamine-induced itch (alloknesis).
In order to assess an objective measure for the outcome of ear acupuncture, we evaluated the effect of electrical ear acupuncture on areas of histamine-induced alloknesis in 32 healthy volunteers. In a first assessment 5 min after histamine application on both volar forearms, 16 subjects received right ear and 16 left ear acupuncture. Immediately before and 5 min after acupuncture, alloknesis a...
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ژورنال
عنوان ژورنال: Journal of Investigative Dermatology
سال: 2005
ISSN: 0022-202X
DOI: 10.1111/j.0022-202x.2005.23817.x