Stimulation of virginal oviposition by male factor and its effect on spontaneous nervous activity in Bombyx mori

Yamaoka, Kunihiro; Hirao, Tuneo

doi:10.1016/0022-1910(77)90109-3

Cited by 36 publications

(9 citation statements)

References 12 publications

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“…Moreover, the hemolymph of mated (but not virgin) females contains MF bioactivity (2,17). This finding suggests one of the following: (i) EF and MF may be transported to the hemolymph from the female genital tract, as occurs with some insect sex peptides (18)(19)(20), or (ii) EF and MF may stimulate release into the hemocoel of a substance from the wall of the seminal receptacle. We should be better able to determine which of the latter mechanisms applies to EF once an ELISA is developed.…”

Section: Discussionmentioning

confidence: 93%

Two feeding-induced proteins from the male gonad trigger engorgement of the female tickAmblyomma hebraeum

Weiss

Kaufman

2004

Proc. Natl. Acad. Sci. U.S.A.

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Most female ixodid ticks, once mated, feed to repletion within 6 -10 days. Previous studies indicate that an engorgement factor (EF), passed to the female during copulation, may be the stimulus for engorgement. Here, we show that extracts of the testis͞vas deferens of fed (but not unfed) male Amblyomma hebraeum contain EF bioactivity when injected into the hemocoel of feeding virgins. We have produced recombinant proteins (recproteins) from 28 feeding-induced genes in the male gonad and have identified a recombinant A. hebraeum engorgement factor (recAhEF) among these recproteins. recAhEF is a combination of two peptides, recAhEF␣ (16.1 kDa) and recAhEF␤ (11.6 kDa), neither of which has bioactivity on its own. recAhEF also stimulates salivary gland degeneration and partial development of the ovary, suggesting that it may be the same material as another male gonadal protein from this tick, male factor. We propose the name ''voraxin'' for the natural EF of ticks. When normal mated females were put on a rabbit immunized against recAhEF, 74% failed to feed beyond one-tenth the normal engorged weight within 14 days whereas all mated ticks put on a control rabbit engorged normally (mean duration of 8.8 ؎ 0.8 days). This result constitutes preliminary evidence that an anti-tick vaccine might be developed from voraxin.

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Section: Discussionmentioning

confidence: 93%

Two feeding-induced proteins from the male gonad trigger engorgement of the female tickAmblyomma hebraeum

Weiss

Kaufman

2004

Proc. Natl. Acad. Sci. U.S.A.

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“…However, there may be evolutionary constraints determined by other, probably ancestral, functions of male accessory gland products. Lepidopteran spermatophores have important effects that are chemical in nature (Leopold 1976; D r u m m o n d 1984), including sperm activation (Sheperd 1975;Herman and Peng 1976) and stimulation of oviposition (MacFarlane and Tsao 1974;Yamaoka and Hirao 1977). Of the studies cited above, only Sheperd (1975) determined the chemical nature of the substance, and it was a polypeptide.…”

Section: Discussionmentioning

confidence: 99%

Rate of ejaculate breakdown and intermating intervals in monarch butterflies

Oberhauser¹

1992

Behav Ecol Sociobiol

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“…They were maintained on a diet of vinegar flies (Drosophila virilis) both before and after their molt to adulthood. Although the spiders were fed Gromko et al 1984Riemann et al 1967Clark 1988Richards 1960Dickinson 1986Parker & Stuart 1976McLain 1980McLain 1981Wilcox 1984Yamaoka & Hirao 1977Friedel & Gillot 1976Thornhill 1976Friedel & Gillott 1977 regularly, both our delivery of flies and the spiders' acceptance of prey were variable, and that variability resulted in a wide range of actual feeding rates among the spiders.…”

Section: Methodsmentioning

confidence: 99%