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ABSTRACT: Piglets performance, nutrient digestibility and gut health in response to feeding Ulva lactuca seaweed supplemented with a recombinant ulvan lyase or a commercial carbohydrase mixture

PROVIDER: PRJNA1177790 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR31114408_1.fastq.gz	Fastqsanger.gz
	SRR31114408_2.fastq.gz	Fastqsanger.gz
	SRR31114409_1.fastq.gz	Fastqsanger.gz
	SRR31114409_2.fastq.gz	Fastqsanger.gz
	SRR31114410_1.fastq.gz	Fastqsanger.gz

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Integrated transcriptomics and proteomics analysis reveals muscle metabolism effects of dietary Ulva lactuca and ulvan lyase supplementation in weaned piglets

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Integrated transcriptomics and proteomics analysis reveals muscle metabolism effects of dietary Ulva lactuca and ulvan lyase supplementation in weaned piglets

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.

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Project description:Integrated transcriptomics and proteomics analysis reveals muscle metabolism effects of dietary Ulva lactuca and ulvan lyase supplementation in weaned piglets

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Physiological implications of dietary inclusion of the algae Laminaria digitata on the weaned piglet: a combined proteomics and metabolomics approach

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.

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Dietary Laminaria digitata and enzymatic supplementation on the ileum function on weaned piglets: a combined proteomics and metabolomics analysis

Project description:Laminaria digitata is a brown seaweed with prebiotic properties that has the potential to improve the response of weaned piglets to nutritional stress. However, its cell wall polysaccharides are not digested by the endogenous enzymes of monogastric animals. Alginate lyase has shown promise in degrading them under in vitro conditions. The objective of this study is to evaluate the effect of a 10% incorporation of L. digitata, and alginate lyase supplementation on the ileum proteome and metabolome, in a hypothesis generating approach. Control piglets increased the use of glucose as an enteric source of energy, demonstrated by the higher abundance of PKLR and PCK2 proteins and the lower concentration of glucose found in the tissue. Furthermore, seaweed inclusion promoted an increased abundance of proteins related with improved enterocyte structural integrity (ACTBL2, CRMP1, FLII, EML2 and MYLK), peptidase activity (NAALADL1, CAPNS1) and anti-inflammatory activity (C3), demonstrating improved intestinal function. Coherently, they lowered the abundance of apoptosis (ERN2) and proteolytic (DPP4) proteins. Alginate lyase supplementation seems to magnify the baseline effects of feeding the seaweed alone, by increasing the number of differential proteins in the same pathways, possibly as a consequence of increased intracellular nutrient release.

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