Tribolium castaneum
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA237452 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR1161690.fastq.gz | Fastqsanger.gz | |||
| SRR1161700.fastq.gz | Fastqsanger.gz | |||
| SRR1161710.fastq.gz | Fastqsanger.gz | |||
| SRR1161691.fastq.gz | Fastqsanger.gz | |||
| SRR1161701.fastq.gz | Fastqsanger.gz |
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Project description:Purpose: Combination of systemic RNAi with RNAseq to identify target genes of important pathways in early development Wnt/β-catenin and hedgehog (Hh) signaling are essential for transmitting signals across cell membranes in animal embryos. Early patterning of the principal insect model, Drosophila melanogaster, occurs in the syncytial blastoderm, where diffusion of transcription factors obviates the need for signaling pathways. However, in the cellularized growth zone of typical short germ insect embryos, signaling pathways are predicted to play a more fundamental role. Indeed, the Wnt/β-catenin pathway is required for posterior elongation in most arthropods, although which target genes are activated in this context remains elusive. Here, we use the short germ beetle Tribolium castaneum to investigate two Wnt and Hh signaling centers located in the head anlagen and in the growth zone of early embryos. We find that Wnt/β-catenin signaling acts upstream of Hh in the growth zone, whereas the opposite interaction occurs in the head. We determine the target gene sets of the Wnt/β-catenin and Hh pathways and find that the growth zone signaling center activates a much greater number of genes and that the Wnt and Hh target gene sets are essentially non-overlapping. The Wnt pathway activates key genes of all three germ layers, including pair-rule genes, and Tc-caudal and Tc-twist. Furthermore, the Wnt pathway is required for hindgut development and we identify Tc-senseless as a novel hindgut patterning gene required in the early growth zone. At the same time, Wnt acts on growth zone metabolism and cell division, thereby integrating growth with patterning. Posterior Hh signaling activates several genes potentially involved in a proteinase cascade of unknown function.
2014-02-06 | GSE54706 | GEO
Project description:Background: The AMP-activated protein kinase (AMPK) is an intracellular fuel sensor for lipid and glucose metabolism. In addition to the short-term regulation of metabolic enzymes by phosphorylation, AMPK may also exert long-term effects on the transcription of downstream genes through the regulation of transcription factors and coactivators. In this study, RNA interference (RNAi) was conducted to investigate the effects of knockdown of TcAMPKα on lipid and carbohydrate metabolism in the red flour beetle, Tribolium castaneum, and the transcriptome profiles of dsTcAMPKα-injected and dsEGFP-injected beetles under normal conditions were compared by RNA-sequencing. Results: RNAi-mediated suppression of TcAMPKα increased whole-body triglyceride (TG) level and the ratio between glucose and trehalose, as was confirmed by in vivo treatment with the AMPK-activating compound, 5-Aminoimidazole-4-carboxamide1-β-D-ribofuranoside (AICAR). A total of 1184 differentially expressed genes (DEGs) were identified between dsTcAMPKα-injected and dsEGFP-injected beetles. These include genes involved in lipid and carbohydrate metabolism as well as insulin/insulin-like growth factor signaling (IIS). Real-time quantitative polymerase chain reaction analysis confirmed the differential expression of selected genes. Interestingly, metabolism-related transcription factors such as sterol regulatory element-binding protein 1 (SREBP1) and carbohydrate response element-binding protein (ChREBP) were also significantly upregulated in dsTcAMPKα-injected beetles. Conclusions: AMPK plays a critical role in the regulation of beetle metabolism. The findings of DEGs involved in lipid and carbohydrate metabolism provide valuable insight into the role of AMPK signaling in the transcriptional regulation of insect metabolism.
2020-08-04 | GSE155634 | GEO
Project description:Juvenile hormone (JH) serves vital roles in insect reproduction, development, and many aspects of physiology. JH primarily acts at the gene-regulatory level through an intracellular receptor. The JH receptor (JHR) is a ligand-activated complex of transcription factors of the bHLH-PAS family, consisting of the JH-binding protein Methoprene-tolerant (MET) and its partner Taiman (TAI). Initial studies have indicated significance of post-transcriptional modification (phosphorylation), subunit assembly, and nucleocytoplasmic transport of JHR in JH signaling. However, our knowledge of JHR regulation at the protein level remains rudimentary, partly due to the difficulty of obtaining functional JHR proteins in a purified form. Here we present successful fermentation-level purification of JHR complexes of MET and TAI proteins from two insect species, the beetle Tribolium castaneum and the mosquito Aedes aegypti. The recombinant JHR subunits from each species were co-expressed using a baculovirus system in an insect cell line and purified through affinity steps, yielding soluble proteins, capable of binding both the hormonal ligand (JH III) and DNA bearing cognate JH-response elements. The present quantitative phosphoproteomcis analysis uncovered multiple phosphorylation sites in the TcMET protein, some of which were induced by methoprene. A functional bipartite nuclear localization signal, straddled by phosphorylated residues, was found within the disordered C-terminal region of TcMET. Our present characterization of the recombinant JHR is a primary step towards understanding JHR regulation.
2022-02-16 | PXD028599 | Pride
Project description:Wnt signaling plays a major role in early neural development. An aberrant activation in Wnt/β-catenin pathway leads to defective anteroposterior patterning, resulting in neural tube closure defects (NTDs). Changes in folate metabolism may participate in early embryo fate determination. We report here that in C57BL/6C mouse embryonic stem cells (mESC), folate deficiency activates Wnt/β-catenin pathway by upregulating a chorion-specific transcription factor Gcm1. Specifically, folate deficiency promotes the formation of the Gcm1/β-catenin/T-cell factor (TCF4) complex to regulate the Wnt target gene transactivation through the Wnt-responsive elements. Moreover, the enhanced transcriptional activity of Gcm1 is found to be dependent on CREB binding protein. Lastly, in NTDs mouse models and low folate NTDs human brain samples, Gcm1 and Wnt/β-catenin target genes related to neural tube closure are specifically overexpressed. These results indicate that low folate promotes Wnt/β-catenin signaling via activating Gcm1, leading to aberrant vertebrate neural development
2018-12-27 | GSE124339 | GEO
Project description:The red flour beetle is a common insect that feeds on stored grains
| PRJNA12539 | ENA
Project description:Purpose: Combination of systemic RNAi with RNAseq to identify target genes of important pathways in early development Drosophila early patterning occurs in the syncytial blastoderm where transcription factors diffuse between cells. However, in typical insect embryos, patterning occurs in a cellularized environment where signaling pathways are likely to play a more fundamental role. We use the short germ beetle Tribolium castaneum to investigate two putative Wnt and Hh signaling centers located in the anlagen of head and growth zone. These structures are known to develop in a different way in short germ insects. We find that Hh acts upstream of Wnt in the head, which is different from the Drosophila situation. In the growth zone Wnt signaling acts upstream. For the first time outside Drosophila, we comprehensively determine the Wnt and Hh target gene sets and distinguish the anterior from the posterior gene sets by genetically depleting head or growth zone. Surprisingly, there are significantly more targets in the growth zone than in the head for both pathways and we find that their growth zone gene sets are essentially non-overlapping. Furthermore, several pair rule genes, Tc-caudal, Tc-twist and hindgut patterning genes are regulated by Wnt signaling. In addition, Wnt controls growth zone metabolism and cell division. Posterior Hh signaling activates several genes potentially involved in a proteinase cascade of unknown function. Unexpectedly, we find the Wnt target Tc-senseless to be required for hindgut development. 10-11 h old whole embyro mRNA profiles of the following treatments: reference: wild type 100bp single read triplicates reference: wild type 50bp single read triplicates treatment: Tc-arrow RNAi knockdown 50 bp single read triplicates treatment: Tc-frizzled1/2 RNAi double knockdown 50 bp single read triplicates treatment: Tc-hedgehog RNAi knockdown 100bp single reads quadruplicates treatment: Tc-orthodenticle RNAi knockdown 100bp single reads triplicates treatment: Tc-torso RNAi knockdown 100bp single reads triplicates treatment: Tc-wntless RNAi knockdown 50bp single reads triplicates Total: 2 references, 6 treatments, 25 sequencing runs
2014-02-06 | E-GEOD-54706 | biostudies-arrayexpress
Project description:The extraembryonic serosa is a frontier epithelium providing the insect egg with a full-range innate immune response
| PRJNA234363 | ENA
Project description:The canonical Wnt/β-catenin signaling pathway plays multiple roles during Xenopus gastrulation, including posteriorization of the neural plate, patterning of the mesoderm, and induction of the neural crest. Wnt signaling stabilizes β-catenin, which then activates target genes. However, few targets of this signaling pathway that mediate early developmental processes are known. Here we sought to identify transcriptional targets of the Wnt/β-catenin signaling pathway using a genome-wide approach.
2016-04-25 | GSE77364 | GEO
Project description:The canonical Wnt/β-catenin signaling pathway plays multiple roles during Xenopus gastrulation, including posteriorization of the neural plate, patterning of the mesoderm, and induction of the neural crest. Wnt signaling stabilizes β-catenin, which then activates target genes. However, few targets of this signaling pathway that mediate early developmental processes are known. Here we sought to identify transcriptional targets of the Wnt/β-catenin signaling pathway using a genome-wide approach.
2016-04-25 | GSE77363 | GEO
Project description:During adult homeostasis and regeneration, the freshwater planarian must accomplish a constant balance between cell proliferation and cell death, while also maintaining proper tissue and organ size and patterning. Yet how these ordered processes are precisely modulated, remains relatively unknown. Here we show that planarians use the downstream effector of the Hippo signalling cascade, yorkie (yki; YAP in vertebrates) to control a diverse set of pleiotropic processes in organ homeostasis, stem cell regulation, regeneration, and axial patterning. We show that yki functions to maintain the homeostasis of the planarian excretory (protonephridial) system and to limit stem cell proliferation, while not affecting the differentiation process or cell death. Finally, we show that yki synergizes with WNT/β-catenin signalling to repress head determination by limiting the expression domains of posterior WNT genes and the WNT-inhibitor notum. Together, our data show that yki is a key factor in planarians that integrates stem cell proliferation control, organ homeostasis, and the spatial patterning of tissues.
2015-10-03 | GSE73700 | GEO