Abstract
Changes in the metabolic profile within the intestine of lenok (Brachymystax lenok) when challenged to acute and lethal heat stress (HS) are studied using no-target HPLC–MS/MS metabonomic analysis. A total of 51 differentially expressed metabolites (VIP > 1, P < 0.05) were identified in response to HS, and 34 occurred in the positive ion mode and 17 in negative ion mode, respectively. After heat stress, changes in metabolites related to glycolysis (i.e., alpha-D-glucose, stachyose, and L-lactate) were identified. The metabolites (acetyl carnitine, palmitoylcarnitine, carnitine, and erucic acid) related to fatty acid β-oxidation accumulated significantly, and many amino acids (L-tryptophan, D-proline, L-leucine, L-phenylalanine, L-aspartate, L-tyrosine, L-methionine, L-histidine, and L-glutamine) were significantly decreased in HS-treated lenok. The mitochondrial β-oxidation pathway might be inhibited, while severe heat stress might activate the anaerobic glycolysis and catabolism of amino acid for energy expenditure. Oxidative damage in HS-treated lenok was indicated by the decreased glycerophospholipid metabolites (i.e., glycerophosphocholine, 1-palmitoyl-2-hydroxy-sn-glycero-3-phosphoethanolamine, 1-palmitoyl-sn-glycero-3-phosphocholine, 1-stearoyl-2-oleoyl-sn-glycero-3-phosphocholine, and 1, 2-dioleoyl-sn-glycero-3-phosphatidylcholine) and the increased oxylipin production (12-HETE and 9R, 10S-EpOME). The minor oxidative pathways (omega-oxidation and peroxisomal beta-oxidation) were likely to be induced in HS-treated lenok.
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Data availability
The data used to support the findings of this study are available from the corresponding author upon request.
Change history
04 November 2022
A Correction to this paper has been published: https://doi.org/10.1007/s10695-022-01135-8
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The work was fund support by Beijing technical industry system project (pxm2021 179303 000022), Qinghai Science and Technology Department Project (No. 2018-ZJ-703), and National Natural Science Foundation of China (No. 31760763).
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Yan Chen was responsible for experimental design and manuscript writing. Yang Liu took part in sampling and funding acquisition. Yucen Bai supervised the research project and supervised the writing of the manuscript. Shaogang Xu was responsible for preliminary investigation and funding acquisition. Xiaofei Yang took part in experimental procedures. Bo Cheng was responsible for supervising the research project.
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Chen, Y., Liu, Y., Bai, Y. et al. Intestinal metabolomics of juvenile lenok (Brachymystax lenok) in response to heat stress. Fish Physiol Biochem 48, 1389–1400 (2022). https://doi.org/10.1007/s10695-022-01128-7
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DOI: https://doi.org/10.1007/s10695-022-01128-7