Myosuppressin is involved in the regulation of pupal diapause in the cabbage army moth Mamestra brassicae.

Abstract:

:Diapause, a programmed developmental arrest, is common in insects, enabling them to survive adverse seasons. It is well established that pupal diapause is regulated by ecdysteroids secreted by the prothoracic glands (PGs), with cessation of ecdysteroid secretion after pupal ecdysis leading to pupal diapause. A major factor regulating the gland activity is prothoracicotropic hormone (PTTH) secreted from the brain. In our previous study, we demonstrated that the cessation of PTTH release after pupal ecdysis resulted in the inactivation of the PGs, leading to pupal diapause in the cabbage army moth Mamestra brassicae. Here we show that a neuropeptide myosuppressin also contributes to the inactivation of PGs at the initiation of diapause. Myosuppressin suppresses PTTH-stimulated activation of the PGs in vitro. Concentrations of myosuppressin in the hemolymph after pupal ecdysis are higher in diapause pupae than in nondiapause pupae.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Yamada N,Kataoka H,Mizoguchi A

doi

10.1038/srep41651

subject

Has Abstract

pub_date

2017-01-31 00:00:00

pages

41651

issn

2045-2322

pii

srep41651

journal_volume

7

pub_type

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