In insects, ecdysteroids are synthesized by genes of the Halloween family and play important roles in several key developmental events, including molting and metamorphosis. (chinaagrisci.com)
Insect hormones such as ecdysteroids and juvenoids play a key role in accessory gland development and protein synthesis but little is known about underlying molecular players and their mechanism of action. (sdbonline.org)
Structural features in these heterodimeric complexes shed lights on how ecdysteroids initiate molting and metamorphosis in insects. (biomedcentral.com)
Metamorphosis2
Butterflies have a four-stage life cycle , as like other holometabolan insects they undergo complete metamorphosis . (wiki2.org)
When metamorphosis is complete, the pupal skin splits, the adult insect climbs out, expands its wings to dry, and flies off. (wiki2.org)
Ecdysone2
In Drosophila, the hormone ecdysone governs transitions between key developmental stages. (sdbonline.org)
Sequence comparison and phylogenetic analysis showed striking conservations among insect ecdysone receptors, especially between P. xylostella and other lepidopterans. (biomedcentral.com)
Receptors3
According to the bimodal switch model, steroid hormone receptors recruit corepressors in the absence of hormone and coactivators in its presence. (sdbonline.org)
This study examined the roles of hormone-dependent transcription factors (Nuclear Receptors), in accessory gland development, function and male fertility of a genetically tractable insect model, Drosophila melanogaster. (sdbonline.org)
First, an RNAi screen was carried out involving 19 hormone receptors, individually and specifically, in a male reproductive tissue (accessory gland) for their requirement in Drosophila male fertility. (sdbonline.org)
Given the central role PGRP-LC plays in sensing systemic bacterial infections, steroid hormone regulation provides a significant degree of modulation on the ability of cells or animals to respond to bacterial infection. (biomedcentral.com)
Gene regulation by steroid hormones plays important roles in health and disease. (sdbonline.org)
Juvenile hormone2
Juvenile hormone (JH) biosynthesis is inhibited under short-day conditions in the brown-winged green bug Plautia stali. (bvsalud.org)
Various plant species contain terpene secondary metabolites, which disrupt insect growth and development by affecting the activity of juvenile hormone-degrading enzymes, and the juvenile hormone (JH) titers maintained in insects. (mdpi.com)
Adult2
In earlier work, we established that 20E, signaling through a canonical nuclear hormone receptor pathway, is required for PGRP-LC expression both in cultured cells and in adult flies. (biomedcentral.com)
The adult, sexually mature, stage of the insect is known as the imago. (allrefer.com)
Regulation1
This study identifies a non-canonical EcR-corepressor complex with the potential for a direct regulation of ATP-dependent nucleosome remodelling by a nuclear hormone receptor. (sdbonline.org)
Butterflies2
Butterflies ( Rhopalocera ) are insects that have large, often brightly coloured wings, and a conspicuous, fluttering flight. (wiki2.org)
Larvae of a few butterflies (e.g., harvesters ) eat harmful insects, and a few are predators of ants , while others live as mutualists in association with ants. (wiki2.org)
Brain5
It was originally described simply as "brain hormone" by early workers such as Stefan Kopeć (1922) and Vincent Wigglesworth (1934), who realized that ligation of the head of immature insects could prevent molting or pupation of the body region excluded from the head if the ligation was performed before a critical age in the lifestage was reached. (wikipedia.org)
Thus, the brain was originally thought to be the source of the hormone that induces molting in insects. (wikipedia.org)
Later it was established that the insect brain produces a number of hormones, but the hormone which was the cause of the observations made by Kopeć and Wigglesworth was prothoracicotropic hormone. (wikipedia.org)
PTTH is secreted by a neurohemal organ, the corpus cardiacum (in some insects the corpus allatum secretes PTTH) which is actually a discrete structure posterior to the brain. (wikipedia.org)
Expression of the Plast-MIP mRNA precursor was detected in the brain of insects reared under short- and long-day conditions. (bvsalud.org)
Function1
The Insects: Structure and Function. (wikipedia.org)
Body1
Butterflies and moths are insects in the order Lepidoptera, meaning "scale winged" in Greek for the tiny scales covering their wings and body. (eol.org)