Bombyx mori prothoracicostatic peptide inhibits ecdysteroidogenesis in vivo
2004
Liu, X. | Tanaka, Y. | Song, Q. | Xu, B. | Hua, Y.
Bombyx prothoracicostatic peptide (Bom-PTSP) is a brain neuropeptide that has recently been reported to have in vitro inhibitory activity to prothoracicotropic hormone (PTTH)-stimulated ecdysteroid biosynthesis in the prothoracic gland of the silkworm, Bombyx mori. In the present report, Bom-PTSP has been shown to significantly decrease hemolymph ecdysteroid titer in the fifth instar larvae when Bom-PTSP was injected into the fifth instar day 8 silkworm larvae, resulting in significant delay in spinning behavior. This is the first evidence that Bom-PTSP inhibits in vivo ecdysteroidogenesis in the silkworm.
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