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Two cGMP-dependent protein kinases have opposing effects on molt-inhibiting hormone regulation of Y-organ ecdysteroidogenesis.
J Exp Biol
January 2025
Department of Biology, Colorado State University, Fort Collins, CO, USA.
Decapod crustaceans regulate molting through steroid molting hormones, ecdysteroids, synthesized by the molting gland (Y-organ, YO). Molt-inhibiting hormone (MIH), a neuropeptide synthesized and secreted by the eyestalk ganglia, negatively regulates YO ecdysteroidogenesis. MIH signaling is mediated by cyclic nucleotide second messengers.
View Article and Find Full Text PDFThe effect of thermal stress on the X-organ/sinus gland proteome of the estuarine blue crab Callinectes sapidus during the intermolt and premolt stages.
J Proteomics
January 2025
Department of Physiology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil; Department of Biology, University of Virginia, Charlottesville, USA.
Survival of brachyuran crabs is temperature-dependent and thermal stress promotes changes during molting. We aimed to decipher the impact of thermal stresses on the X-organ/sinus gland (XO/SG) complex, a temperature-sensitive neuroendocrine tissue involved in the molting regulation of Callinectes sapidus during the intermolt and premolt phases. We employed a proteogenomic approach using specimens subjected to control (24 °C), cold (19 °C), and heat (29 °C) temperatures.
View Article and Find Full Text PDFThe ecdysone-induced bZIP transcription factor MafB establishes a positive feedback loop to enhance vitellogenesis and reproduction in the mosquito.
Proc Natl Acad Sci U S A
January 2025
Department of Entomology, University of California, Riverside, CA 92521.
Female mosquitoes require a vertebrate blood meal to activate reproduction, transmitting numerous devastating human diseases. Vitellogenesis is a central event of female reproduction that involves the massive production of vitellogenin (Vg) in the fat body and the maturation of ovaries. This process is controlled by the steroid hormone 20-hydroxyecdysone (20E); however, its molecular regulatory basis remains not completely understood.
View Article and Find Full Text PDFSteroid hormone-induced wingless ligands tune female intestinal size in Drosophila.
Nat Commun
January 2025
Department of Biology, Institute of Genetics, The Faculty of Mathematics and Natural Sciences, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.
Female reproduction comes at great expense to energy metabolism compensated by extensive organ adaptations including intestinal size. Upon mating, endocrine signals orchestrate a 30% net increase of absorptive epithelium. Mating increases production of the steroid hormone Ecdysone released by the Drosophila ovaries that stimulates intestinal stem cell (ISC) divisions.
View Article and Find Full Text PDFAn overview of recent progress in the molecular mechanisms and key biological macromolecules involved in limb regeneration of decapods.
Int J Biol Macromol
December 2024
College of Marine Science, Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf Ocean Development Research Center, Beibu Gulf University, Qinzhou, Guangxi, China. Electronic address:
Article Synopsis
- Understanding the molecular mechanisms behind limb regeneration in decapods could boost aquaculture by enhancing survival rates, growth, and supporting lab-grown crustacean meat production as a sustainable protein source.
- The review delves into the specific signaling pathways, genes, and proteins involved in various regeneration stages, starting with immune response and hemolymph coagulation, then moving to blastema formation and limb growth.
- It also emphasizes the influence of environmental factors, nutrition, and hormonal signals on the regeneration process and points out gaps in current research, suggesting future studies to improve aquaculture practices.
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