Metamorphosis

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 41 3   Download

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 47 5   Download

Juvenile hormone controls the timing of insect metamorphosis. As a final step of juvenile hormone biosynthesis, juvenile hormone acid O-methyl-transferase (JHAMT) transfers the methyl group from S-adenosyl-l-methi-onine to the carboxyl group of farnesoic acid and juvenile hormone acid.

13p galaxyss3 07-03-2013 30 4   Download

Jumonji (Jmj) is a transcriptional repressor that plays important roles in the suppression of cell proliferation and development of various tissues in the mouse. To further clarify the roles of Jmj during development and gain insight into mechanisms of Jmj-mediated transcriptional regulation, we have taken advantage ofDrosophilaas a model organism.

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Changes in the mitochondrial membrane potential play a key role in deter-mining cell fate. Mitochondria membrane hyperpolarization has been found to occur after cell activation, e.g. in lymphocytes, whereas depolar-ization is associated with apoptosis.

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Mitochondria regulate platelet metamorphosis induced by opsonized zymosan A – activation and long-term commitment to cell death Paola Matarrese1, Elisabetta Straface1, Giuseppe Palumbo2, Maurizio Anselmi2, Lucrezia Gambardella1, Barbara Ascione1, Domenico Del Principe2 and Walter Malorni1 1 Department of Therapeutic Research and Medicines Evaluation, Istituto Superiore di Sanita’, Rome, Italy 2 Department of Pediatrics, University of Rome Tor Vergata, Italy Keywords aggregation; apoptosis; mitochondrial membrane potential; platelets; zymosan Correspondence P.

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Polcalcins such as Bet v 4 and Phl p 7 are pollen allergens that are con-structed from EF-hand motifs, which are very common and well character-ized helix–loop–helix motifs with calcium-binding functions, as elementary building blocks. Being members of an exceptionally well-characterized protein superfamily, these allergens highlight the fundamental challenge in explaining what features distinguish allergens from nonallergenic proteins.

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Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: The genomic response to 20-hydroxyecdysone at the onset of Drosophila metamorphosis...

13p thulanh19 09-11-2011 58 3   Download

Sơ đồ cấu tạo cơ thể động vật đã được quy định nghiêm ngặt trong quá trình phát triển cơ thể (ontogeny) từ giai đoạn phôi đến các giai đoạn phát sinh hình thái (metamorphosis) sau đó.

16p thitkhotieu 28-06-2011 51 4   Download