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Vasodilatory activity in horsefly and deerfly salivary glands
Author(s) -
Rajská P.,
Pecháňová O.,
TAKÁC P.,
Kazimírová M.,
Roller L.,
Vidlicka L,
Ciampor F.,
Labuda M.,
Nuttall P. A.
Publication year - 2003
Publication title -
medical and veterinary entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.028
H-Index - 82
eISSN - 1365-2915
pISSN - 0269-283X
DOI - 10.1111/j.1365-2915.2003.00457.x
Subject(s) - vasodilation , biology , phenylephrine , saliva , femoral artery , medicine , anatomy , endocrinology , biochemistry , blood pressure
Abstract. Salivary gland extract (SGE) of four horsefly species ( Hybomitra bimaculata Macquart, Hybomitra ciureai Séguy, Tabanus bromius L., Tabanus glaucopis Meigen) and one deerfly species ( Chrysops relictus Meigen) (Diptera: Tabanidae) were shown to contain vasodilatory activity. Aliquots equivalent to 1, 5 and 10 pairs of salivary glands (SG) relaxed rat femoral artery (with intact endothelium) pre‐constricted with phenylephrine. Vasodilatory activity was dose‐dependent. SGE of one horsefly species ( Haematopota pluvialis L.) did not induce relaxation. The kinetics of vasodilation induced by SGE of four horsefly species differed from the deerfly. These results indicate that tabanid species may produce more than one type of vasodilator to aid blood feeding.