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Insect molting
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20-hydroxyecdysone (20E) plays important roles in insect molting and metamorphosis. 20E-induced autophagy has been detected during the larval–pupal transition in different insects. In Bombyx mori, autophagy is induced by 20E in the larval fat body. Long non-coding RNAs (lncRNAs) function in various biological processes in many organisms, including insects.
16p
vilichoo2711
23-06-2021
7
1
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Molting is an essential biological process occurring characteristic times throughout the life cycle of holometabolous insects. However, it is not clear how insects determine the direction of molting to remain status quo or to initiate metamorphosis.
12p
viwyoming2711
16-12-2020
9
1
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Ecdysteroids are hormones with an important role in the molting, reproduction and immunological defense of arthropods. Ecdysone Receptor (EcR) is a protein that belongs to the superfamily of nuclear receptors, widely studied for pesticide discovery. Currently, several non-steroidal molecules, belonging to the chemical group of diacilhydrazines (DAH), are commercially available for pest control. Such molecules are specific for lepidopteran or coleopteran pests. Hemipterans are important pests in most crops and many cases of pesticide resistance are reported.
10p
chauchaungayxua1
04-12-2019
14
1
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N-tert-Butyl-N,N¢-dibenzoylhydrazine and its analogs are nonsteroidal ecdysone agonists that exhibit insect molting hormonal and larvicidal activities. The interaction mode of those ecdysone agonists with the heterodimer of the ecdy-sone receptor andultraspiracle has not been fully elucidated. We expressed the ecdysone receptor B1 and the ultraspiracle of the lepidopteran,Chilo suppressalis,using anin vitro transcription/translation system and confirmed, using gel-shift assays, that the proteins functionas ecdysone receptors. We also analyzed their ligand-binding affinity. ...
10p
tumor12
20-04-2013
44
2
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Prothoracicotropic hormone (PTTH) plays a central role in controlling molting, metamorphosis, and diapause termination in insects by stimulating the prothoracic glands to synthesize and release the molting hormone, ecdysone. Using Autographa californicanucleopolyhedrovirus (AcNPV)-mediated transient gene transfer into the central nervous sytem (CNS) of the silkworm, Bombyx mori, we identified two cis-regulatory elements that participate in the decision and the enhancement ofPTTHgene expression in PTTH-producing neurosecretory cells (PTPCs). ...
10p
fptmusic
11-04-2013
36
2
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The steroid hormone 20-hydroxyecdysone (20E) initiates insect molting and metamorphosis through binding with a heterodimer of two nuclear recep-tors, the ecdysone receptor (EcR) and ultraspiracle (USP). Expression of the specific isoforms EcR-A and EcR-B1 governs steroid-induced responses in the developing cells of the silkworm Bombyx mori.
8p
inspiron33
25-03-2013
44
3
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The cuticles of most insect larvae have a variety of melanin patterns that function in the insects’ interactions with their biotic and abiotic environ-ments. Larvae of the armywormPseudaletia separatahave black and white stripes running longitudinally along the body axis. This pattern is empha-sized after the last larval molt by an increase in the contrast between the lines.
10p
galaxyss3
21-03-2013
45
2
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21 Postembryonic Development 1. Introduction During their postembryonic growth period insects pass through a series of stages until they become adult, the time interval occupied by each instar being terminated by a molt. Apterygotes continue to grow and molt as adults, periods of growth alternating with periods of reproductive activity.
30p
lqhoang
30-11-2010
58
6
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