Inhibitory effect of azelastine on allergic itch-associated response in mice sensitized with mosquito salivary glands extract. 2003

Eiji Ohtsuka, and Sanae Kawai, and Hiroshi Nojima, and Tsugunobu Andoh, and Kiyoshi Kamimura, and Yasushi Kuraishi
Department of Applied Pharmacology, Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Toyama, Japan.

We examined whether azelastine would inhibit itch-associated responses of mice to mosquito allergy. Repeated injections of mosquito salivary gland extract increased scratching and sensory nerve activity. Azelastine inhibited the increased scratching and nerve activity, while terfenadine was without effects. Dexamethasone did not affect the increased scratching. Azelastine suppressed high K(+)-induced increase in intracellular free Ca(2+) in primary cultures of mouse sensory neurons. Direct inhibition by azelastine of sensory neurons may be at least involved in the anti-pruritic effect of azelastine. Histamine, substance P, and leukotriene B(4) may not play a key role in the itching of mosquito allergy.

UI MeSH Term Description Entries
D007271 Injections, Intradermal The forcing into the skin of liquid medication, nutrient, or other fluid through a hollow needle, piercing the top skin layer. Intradermal Injections,Injection, Intradermal,Intradermal Injection
D008297 Male Males
D008813 Mice, Inbred ICR An inbred strain of mouse that is used as a general purpose research strain, for therapeutic drug testing, and for the genetic analysis of CARCINOGEN-induced COLON CANCER. Mice, Inbred ICRC,Mice, ICR,Mouse, ICR,Mouse, Inbred ICR,Mouse, Inbred ICRC,ICR Mice,ICR Mice, Inbred,ICR Mouse,ICR Mouse, Inbred,ICRC Mice, Inbred,ICRC Mouse, Inbred,Inbred ICR Mice,Inbred ICR Mouse,Inbred ICRC Mice,Inbred ICRC Mouse
D009033 Culicidae A family of the order DIPTERA that comprises the mosquitoes. The larval stages are aquatic, and the adults can be recognized by the characteristic WINGS, ANIMAL venation, the scales along the wing veins, and the long proboscis. Many species are of particular medical importance. Mosquitoes,Mosquitos,Mosquito
D009475 Neurons, Afferent Neurons which conduct NERVE IMPULSES to the CENTRAL NERVOUS SYSTEM. Afferent Neurons,Afferent Neuron,Neuron, Afferent
D010793 Phthalazines Bicyclic heterocyclic compounds containing a BENZENE ring fused to PYRIDAZINE.
D011537 Pruritus An intense itching sensation that produces the urge to rub or scratch the skin to obtain relief. Itching,Pruritis
D002118 Calcium A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes. Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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