Ontology highlight
ABSTRACT:
PROVIDER: PRJNA759121 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Guar gum consists mainly of galactomannan, and constitutes the endosperm of guar seeds that acts as a reserve polysaccharide for germination. Due to its molecular structure and physical properties, this biopolymer has been considered as one of the most important and widely used gums in industry. However, for many of these applications this (hemi-)cellulosic structure needs to be modified or (partially) depolymerized in order to customize and improve its physicochemical properties. In this study, transcriptome was employed to decipher the complete enzymatic arsenal for guar gum depolymerization by Aspergillus niger.
2020-08-11 | GSE119310 | GEO
Project description:Non-alcoholic fatty liver disease (NAFLD) is rapidly becoming the most common liver disease worldwide, yet the pathogenesis of NAFLD is only partially understood. Here, we investigated the role of the gut bacteria in NAFLD by stimulating the gut bacteria via feeding mice the fermentable dietary fiber guar gum and suppressing the gut bacteria via chronic oral administration of antibiotics. Guar gum feeding profoundly altered the gut microbiota composition, in parallel with reduced diet-induced obesity and improved glucose tolerance. Strikingly, despite reducing adipose tissue mass and inflammation, guar gum enhanced hepatic inflammation and fibrosis, concurrent with markedly elevated plasma and hepatic bile acid levels. Consistent with a role of elevated bile acids in the liver phenotype, treatment of mice with taurocholic acid stimulated hepatic inflammation and fibrosis. In contrast to guar gum, chronic oral administration of antibiotics effectively suppressed the gut bacteria, decreased portal secondary bile acid levels, and attenuated hepatic inflammation and fibrosis. Neither guar gum or antibiotics influenced plasma lipopolysaccharide levels. In conclusion, our data indicate a causal link between changes in gut microbiota and hepatic inflammation and fibrosis in a mouse model of NAFLD, possibly via alterations in bile acids.
2017-06-06 | GSE76087 | GEO
Project description:Effect of partially hydrolyzed guar gum on gut microbiota in a rat model of short bowel syndrome.
| PRJDB8061 | ENA
Project description:Cancer cachexia and the associated skeletal muscle wasting are considered poor prognostic factors, although effective treatment has not yet been established. Recent studies have indicated that the pathogenesis of skeletal muscle loss may involve dysbiosis of the gut microbiota and the accompanying chronic inflammation or altered metabolism. In this study, we evaluated the possible effects of modifying the gut microenvironment with partially hydrolyzed guar gum (PHGG), a soluble dietary fiber, on cancer-related muscle wasting and its mechanism using a colon-26 murine cachexia model. Compared to a fiber-free (FF) diet, PHGG contained fiber-rich (FR) diet attenuated skeletal muscle loss in cachectic mice by suppressing the elevation of the major muscle-specific ubiquitin ligases Atrogin-1 and MuRF1, as well as the autophagy markers LC3 and Bnip3. Although tight junction markers were partially reduced in both FR and FF diet-fed cachectic mice, the abundance of Bifidobacterium, Akkermansia, and unclassified S24-7 family increased by FR diet, contributing to the retention of the colonic mucus layer. The reinforcement of the gut barrier function resulted in the controlled entry of pathogens into the host system and reduced circulating levels of lipopolysaccharide-binding protein (LBP) and IL-6, which in turn led to the suppression of proteolysis by downregulating the ubiquitin-proteasome system and autophagy pathway. These results suggest that dietary fiber may have the potential to alleviate skeletal muscle loss in cancer cachexia, providing new insights for developing effective strategies in the future.
2021-11-23 | E-MTAB-11094 | biostudies-arrayexpress
Project description:Early-weaning-induced stress causes diarrhea, thereby reduces growth performance of piglets. Gut bacterial dysbiosis emerges as a leading cause of post-weaning diarrhea. The present study was aimed to investigate the effect of capsulized fecal microbiota transportation (FMT) on gut bacterial community, immune response and gut barrier function of weaned piglets. Thirty-two were randomly divided into two groups fed with basal diet for 21 days. Recipient group was inoculated orally with capsulized fecal microbiota of health Tibetan pig daily morning during whole period of trial, while control group was given orally empty capsule. The results showed that the F/G ratio, diarrhea ratio, diarrhea index, and histological damage score of recipient piglets were significantly decreased. FMT treatment also significantly increased the colon length of piglets. Furthermore, the relative abundances of Firmicutes, Euryarchaeota, Tenericutes, Lactobacillus, Methanobrevibacter and Sarcina in colon of recipient piglets were increased, and the relative abundances of Campylobacter, Proteobacteria, and Melainabacteria were significantly decreased compared with control group.
2019-09-17 | GSE137470 | GEO
Project description:The molecular response of Aspergillus niger to guar gum
| PRJNA488725 | ENA
Project description:The brown seaweed Laminaria digitata is a novel feedstuff for weaned piglets. It can help prevent dysbiosis in addition to improve overall health and performance. However, it has a recalcitrant cell wall that is not easily digested by the piglet digestive system. Alginate lyase has promising effects for the supplementation of in vivo diets in order to address this issue. The objective of this study is to evaluate the effect of 10% dietary Laminaria digitata inclusion and alginate lyase supplementation on the hepatic proteome and metabolome of weaned piglets in a physiological study. The diets caused incipient differences on the metabolome of piglets, with the proteome having the most significant changes. Feeding seaweed provided a source of n-3 PUFA that accumulated in the liver, signalling for increased fatty acid oxidation (FABP, ACADSB, ALDH1B1). This contributed at least in part to reduce oxidative stability of the tissue, demanding the higher abundance of GST to maintain it. Reactive oxygen species possibly damaged proteins, which caused hepatocytes to increase proteasome activity (LAPTM4B, PSMD4), recycling their amino acids. Providing alginate lyase to the diet increased the number of differentially abundant proteins, including GBE1 and LDHC that contributed to the maintenance of circulating glucose through mobilization of glycogen stores and branched chain amino acids. Enzymatic supplementation enhanced the baseline effects of feeding seaweed alone.
2024-01-05 | PXD043520 | Pride
Project description:Sixty crossbred piglets (Duroc*Landrace*Yorkshire) weaned at the age of 21 days were maintained for one week and had free access to feed and water. During this week, all the piglets were scored for the severity of diarrhea. Diarrhea index was scored as follows: 1= hard feces; 2= no scours, feces of normal consistency; 3= mild scours, soft, partially formed feces; 4= moderate scours, loose, semi-liquid feces; 5= watery feces; as previously did Those piglets with a score of 4 or 5 for three continuous days were designated as diarrhea piglets, while those piglets with a score of 1 or 2 for three continuous days were designated as normal piglets..
2022-01-03 | GSE192690 | GEO
Project description:Seaweeds, including the green Ulva lactuca, can potentially reduce competition between feed, food, and fuel. They can also contribute to the improved development of weaned piglets. However, their indigestible polysaccharides of the cell wall pose a challenge. This can be addressed through carbohydrase supplementation, such as the recombinant ulvan lyase. The objective of our study was to assess the muscle metabolism of weaned piglets fed with 7% U. lactuca and 0.01% ulvan lyase supplementation, using an integrated transcriptomics and proteomics approach. Feeding piglets with seaweed and enzyme supplementation resulted in reduced macronutrient availability, leading to protein degradation through the proteasome (PSMD2), with resulting amino acids being utilized as an energy source (GOT2, IDH3B). Moreover, mineral element accumulation (iodine and bromine) contributed to increased oxidative stress, evident from elevated levels of antioxidant proteins like catalase, as a response to maintain tissue homeostasis. The upregulation of the gene AQP7, associated with the osmotic stress response, further supports these findings. Consequently, an increase in chaperone activity, including HSP90, was required to repair damaged proteins. Our results suggest that enzymatic supplementation may exacerbate the effects observed from feeding U. lactuca alone, potentially due to side effects arising from cell wall degradation during digestion.
2024-02-27 | PXD043394 | Pride
Project description:Background and study aims
Colorectal cancer is the third most common cancer worldwide. Surgery is the mainstay for treatment but adjuvant chemotherapy with 5-fluorouracil in combination with leucovorin has improved survival significantly. Adjuvant treatment is linked to considerable toxicity and thus means for alleviation need to be explored. The mode of chemotherapy administration may improve tolerability, as may nutritional factors such as lactose intolerance and the gut bacterial flora.
Who can participate?
Patients aged between 18-75 years with colorectal cancer, fit for chemotherapy with no significant morbidity.
What does the study involve?
Participants will be randomly allocated to receive 5-fluorouracil and leucovorin either as a single large dose (bolus injection) or by continuous infusion. Participants will also be randomly allocated to receive nutritional counselling with or without supplementation with lactobacillus GG or guar gum fiber. Blood and fecal sampling will be taken before, during and after adjuvant chemotherapy. Patients will be followed up for 10 years.
| 2426970 | ecrin-mdr-crc