Project description:Cerebral ischemia-reperfusion (I/R) injury triggers acute neuroinflammation, which exacerbates neuronal damage and functional deficits. Laminaria japonica polysaccharide (LJP) has been reported to exert anti-inflammatory and neuroprotective effects, but its molecular mechanisms in I/R injury remain unclear. In this study, we performed transcriptome sequencing on ischemic brain tissues from Sham, Vehicle, and LJP-treated mice to elucidate the molecular mechanisms underlying LJP’s anti-inflammatory actions. Our results show that LJP treatment significantly modulated the expression of key genes involved in inflammatory responses, particularly through the regulation of Csf3-mediated pathways. These findings provide novel insights into the therapeutic potential of LJP for ischemic stroke and identify potential targets for future interventions.
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.