RRC ID 32391
著者 Ohhara Y, Shimada-Niwa Y, Niwa R, Kayashima Y, Hayashi Y, Akagi K, Ueda H, Yamakawa-Kobayashi K, Kobayashi S.
タイトル Autocrine regulation of ecdysone synthesis by β3-octopamine receptor in the prothoracic gland is essential for Drosophila metamorphosis.
ジャーナル Proc Natl Acad Sci U S A
Abstract In Drosophila, pulsed production of the steroid hormone ecdysone plays a pivotal role in developmental transitions such as metamorphosis. Ecdysone production is regulated in the prothoracic gland (PG) by prothoracicotropic hormone (PTTH) and insulin-like peptides (Ilps). Here, we show that monoaminergic autocrine regulation of ecdysone biosynthesis in the PG is essential for metamorphosis. PG-specific knockdown of a monoamine G protein-coupled receptor, β3-octopamine receptor (Octβ3R), resulted in arrested metamorphosis due to lack of ecdysone. Knockdown of tyramine biosynthesis genes expressed in the PG caused similar defects in ecdysone production and metamorphosis. Moreover, PTTH and Ilps signaling were impaired by Octβ3R knockdown in the PG, and activation of these signaling pathways rescued the defect in metamorphosis. Thus, monoaminergic autocrine signaling in the PG regulates ecdysone biogenesis in a coordinated fashion on activation by PTTH and Ilps. We propose that monoaminergic autocrine signaling acts downstream of a body size checkpoint that allows metamorphosis to occur when nutrients are sufficiently abundant.
巻・号 112(5)
ページ 1452-7
公開日 2015-2-3
DOI 10.1073/pnas.1414966112
PII 1414966112
PMID 25605909
PMC PMC4321272
MeSH Animals Drosophila / growth & development* Ecdysone / biosynthesis* Insect Hormones / metabolism Larva / growth & development Metamorphosis, Biological* Receptors, Biogenic Amine / metabolism Receptors, Biogenic Amine / physiology* Signal Transduction Thorax / physiology* Tyramine / biosynthesis
IF 9.412
引用数 25
WOS 分野 CELL BIOLOGY
リソース情報
ショウジョウバエ 31348R-1 10687R-1