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ABSTRACT: Dietary fucoidan in weaned pigs

PROVIDER: PRJNA474838 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7269031.fastq.gz	Fastqsanger.gz
	SRR7269032.fastq.gz	Fastqsanger.gz
	SRR7269033.fastq.gz	Fastqsanger.gz
	SRR7269034.fastq.gz	Fastqsanger.gz
	SRR7269035.fastq.gz	Fastqsanger.gz

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Comparative trancriptome analysis of weaned pigs in response to different dietary starch sources

Project description:The starch, acting as the major energy-producing component of the daily diet, is the main carbohydrate in mammal nutrition. However, the nutritional value of starch can vary widely depending upon its source and site of digestion. The distinct physiological responses were previously observed both in human and other mammals, but still little is known about the underlying mechanisms regarding the metabolic shifts due to the intake of various dietary starches. Here, we assessed the overall metabolic changes in weaned pigs induced by different dietary starch sources at the transcriptome level. Sixteen weaned pigs (DurocÃLandraceÃYorkshire) were selected and randomly allotted to diets containing either wheat (WH) or cassava (CA) starch as the energy source (n=8). We measured serum metabolites and hormones and generated transcriptional profiles of liver. 648 genes in liver were differentially expressed in response to dietary starch sources. Pathway analysis indicated that dietary starch sources altered both carbohydrate and lipid metabolism in liver. In contrast, CA may be more healthful as dietary energy source than WH by down-regulating lipogenesis and steroidogenesis in liver. Sixteen weaned pigs (DurocÃLandraceÃYorkshire) with an average initial body weight of 7.37Â±0.25 kg were selected and randomly allotted to two dietary treatments (either wheat or cassava starch as the energy source) for 21 d. At the end of the trial, the liver tissue were collected for transcriptome analysis using Agilent porcine microarrays.

2010-09-09 | E-GEOD-20721 | biostudies-arrayexpress

Comparative transcriptome analysis of weaned pigs in response to different dietary starch sources displaying metabolic changes of lipids in liver

Project description:Diets rich in carbohydrates not only lead to obesity but also contribute to the liver metabolic diseases. Starch is the major energy source of the daily diet. However, little is known about the metabolic changes due to the intake of different dietary starches. Our aim was to assess the overall metabolic changes at the transcriptome level. Animal model was used, and a total of 16 weaned pigs were randomly allotted to two experimental diets containing either of cassava starch (CS) or maize starch (MS) during 21 days. At the end of the trial, liver tissues were sampled and used for analysis of digestive enzymes, metabolites and transcriptomes. The growth performance was not affected by dietary starch sources. However, CS-feeding significantly increased the serum insulin and cholesterol concentrations (P<0.05). The liver triglyceride and cholesterol content were both elevated by CS-feeding (P<0.05). Microarray analysis led to the identification of 648 genes differentially expressed in liver (P<0.05). The CS-feeding activated the transcription of lipogenic genes such as HMGR and FASN, but decreased the expression of lipolytic genes such as ACOX1, PPARA and FBP. The microarray results correlated well with the measurements of several key enzymes involved in hepatic lipid metabolisms. These results suggested that dietary starch source alters hepatic transcriptome in weaned pigs. The slowly digestible starch (i.e. MS) seemed to be more healthful for mammals as the dietary energy supplier by transcriptional down-regulation of lipogenesis and steroidogenesis.

2010-03-11 | GSE20721 | GEO

Intestinal proteomic response to oral challenge of enterotoxigenic Escherichia coli in weaned pigs

Project description:Enterotoxigenic Escherichia coli (ETEC) is a major cause of diarrhoea in children in resource-limited countries and of travellers diarrhoea. The ileal proteomics change after ETEC challenge is less characterised. Here in this study changes of ileal proteins post ETEC challenge in weaned pigs are studied. In total, 5151 ileal proteins were successfully annotated and 9 proteins had significantly different abundance between the ETEC and CON pigs.

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Anti-proliferation activity of fucoidan on MKN45 gastric cancer cells and downregulation of phosphorylated ASK1, a cell-cycle-regulated cyclin-dependent kinase

Project description:Fucoidan is a high-molecular polysaccharide whose main constituent is sulfated fucose. Extensive studies have demonstrated numerous interesting biological activities for fucoidan. We specifically focused on the anti-proliferation activity of fucoidan and examined the underlying mechanism in MKN45 gastric cancer cells. BrdU assay revealed that fucoidan impeded the MKN45 cell cycle by approximately 50%, and clonogenic assay also showed that fucoidan inhibited cell proliferation. Preliminary examinations of fucoidan using LDH assay showed no immediate cytotoxic effects at 24-h exposure. However, longer time courses revealed inhibition of cell growth at 4 days in a dose-dependent manner. Microarray analysis in MKN45 cells treated with fucoidan identified genes that were upregulated and downregulated in response to fucoidan, including MAP3K5, or ASK1 (apoptosis signal-regulating kinase), which was upregulated by 1.38-fold. Western blot confirmed that fucoidan increased ASK1 protein levels, while reducing the levels of phosphorylated ASK1. Reduction of ASK1 by siRNA decreased proliferation of MKN45 cells. Our findings show that fucoidan may suppress cellular proliferation and DNA synthesis in MKN45 cells by suppressing the ASK1-p38 signaling pathway through reduction of phosphorylated ASK1 levels.

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Expression data from adult zebrafish

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Project description:Gut transcriptome in weaned pigs

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Expression data from adult transgenic zebrafish

Project description:Hepatocellular carcinoma is the fourth leading cause of cancer-related deaths worldwide. Many carcinogens induce inflammation and cirrhosis, and eventually develop into liver cancer. Fucoidan is sulfated polysaccharide that is mainly found in brown seaweeds. In this study, we investigated the effects and mechanisms of low molecular weight fucoidan (i.e. oligo-fucoidan) preventing hepatocarcinogenesis using HBx,Src, and HBx,Src,p53-/+ transgenic zebrafish liver cancer model. Using an oligo-fucoidan oral gavage in adult transgenic zebrafish, we then used microarrays to detail the global programme of gene expression after fucoidan treatment and identified distinct classes of up- and down-regulated genes during this process.

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Expression data from adult wild-type and transgenic zebrafish revealed Oligo-Fucoidan Prevents Radiation induced fibrosis and secondary tumors in zebrafish

Project description:Radiotherapy (RT) often causes unwanted side effects such as radiation-induced fibrosis (RIF) and second malignancies (SM). Fucoidan, a sulfated polysaccharide extracted from brown seaweed, has many biological effects including anti-inflammation and anti-tumor. In the present study, we investigated the radioprotective effect of Oligo-Fucoidan (OF) using zebrafish animal model. Using an oligo-fucoidan oral gavage in wild-type and adult transgenic zebrafish, we then used microarrays to detail the global programme of gene expression after fucoidan treatment and identified distinct classes of up- and down-regulated genes during this process.

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