Beetle metagenome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA254755 | ENA |
REPOSITORIES: ENA
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Project description:Understanding how novel complex traits originate is a foundational challenge in evolutionary biology. Yet how descent with modification in developmental evolution may lead to morphological innovation remains poorly understood. We investigated the origin of thoracic horns in scarabaeine beetles, one of the most dramatic classes of secondary sexual traits in the animal kingdom. We show that thoracic horns derive from bilateral source tissues, that diverse wing genes are functionally required for instructing this process, and that in the absence of Hox-input thoracic horn primordia transform to contribute to ectopic wings. Once induced, however, the transcriptional profile of thoracic horns diverges markedly from that of wings and other wing serial homologs. Our results provide evidence for the serial homology between thoracic horns and insects wings, and suggest that other insect innovations may similarly derive from wing serial homologs and the concomitant recruitment of diverse genes from outside a wing formation context.
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Project description:Dietary intake of fruits and vegetables (FV) has been inversely associated with lower risk of ulcerative colitis. A pig model was used to evaluate the impact of feeding FV on the host response to dextran sulfate sodium (DSS)-induced colitis. Methods: Six-week-old pigs were fed a grower diet alone or supplemented with lyophilized FV equivalent to the half (half-FV) or full (full-FV) daily levels recommended for humans by the Dietary Guidelines for Americans (DGA). Pigs were fed a 1) grower diet alone (negative control), 2) grower diet and orally treated with 4% DSS for 10 days to induce colitis (positive control), 3) half-FV diet treated with 4% DSS or 4) full-FV diet treated with 4% DSS. Pigs were monitored for the development of clinical signs of colitis. Proximal colon (PC) contents and mucosa (PCM) were collected for gut metagenome, tissue transcriptome and histopathological analysis. Results: Pigs fed the full-FV diet did not exhibit diarrhea, showed less fecal occult blood (FOB), PCM crypt hyperplasia but with no differential expressed genes (DEG) or changes in PC microbiome diversity (p < 0.05). Pigs within the half-FV group exhibited increased group FOB and DEG associated with tissue remodeling, crypt and goblet cell hyperplasia in the PCM and no changes in PC microbiome diversity and two pigs exhibiting diarrhea (p < 0.05). Pigs within the DSS positive control group exhibited a reduced DEG involved with intestinal immune response and PC microbiome diversity with altered metagenome, increased group PCM erosion and FOB with persistent diarrhea in one pig (p < 0.05) Conclusions: Overall, our results showed that pigs fed a three-week full-FV supplemented diet, were resistant to DSS-induced colitis with a differential dose-dependent protective effect on host intestinal tissue and gut metagenome when exposed to an inflammatory challenge.
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