Abstract
The experiment mainly focused on the liver of the hybrid grouper (Epinephelus fuscoguttatus ♀ × E. lanceolatus ♂) with low methionine levels by single-cell RNA-seq under high-lipid diets. Both weight gain rate (WGR) and specific growth rate (SGR) in the MR group were obviously lower than the C group, and the intraperitoneal fat (IPF) in the MR group was obviously enhanced than HL and C groups, which led to more visible growth inhibition and lipid deposition. By using the scRNA-seq analysis, nine cell types were classified as: liver parenchymal cells, erythrocytes, hepatic stellate cells, cholangiocytes, macrophages, T cells, epidermal cells, eosinophil and fibroblasts. Lipid and carbohydrate metabolisms were mainly enriched in liver parenchymal cells. The lipid degradation pathways were obviously inhibited in the MR group, such as cholesterol degradation pathway. The lipid degradation genes were obviously decreased in the MR group. In conclusion, methionine restriction might suppress the lipid degradation pathways in liver parenchymal cells, led to obvious lipid deposition.
Published Version
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