Effects of Low-Salinity Stress on Histology and Metabolomics in the Intestine of

Overview

Journal Animals (Basel)

Date 2024 Jul 13

PMID 38997992

Authors

Caijuan Tian

Qiong Wang

Tian Gao

Huarui Sun

Jitao Li

Yuying He

Affiliations

Soon will be listed here.

Abstract

Metabolomics has been used extensively to identify crucial molecules and biochemical effects induced by environmental factors. To understand the effects of acute low-salinity stress on , intestinal histological examination and untargeted metabonomic analysis of were performed after exposure to a salinity of 15 ppt for 3, 7, and 14 d. The histological examination revealed that acute stress resulted in most epithelial cells rupturing, leading to the dispersion of nuclei in the intestinal lumen after 14 days. Metabolomics analysis identified numerous differentially expressed metabolites (DEMs) at different time points after exposure to low-salinity stress, in which some DEMs were steadily downregulated at the early stage of stress and then gradually upregulated. We further screened 14 overlapping DEMs, in which other DEMs decreased significantly during low-salinity stress, apart from L-palmitoylcarnitine and vitamin A, with enrichments in phenylalanine, tyrosine and tryptophan biosynthesis, fatty acid and retinol metabolism, and ABC transporters. ABC transporters exhibit significant abnormalities and play a vital role in low-salinity stress. This study provides valuable insights into the molecular mechanisms underlying the responses of to acute salinity stress.

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