Abstract：
:Tumour necrosis factor alpha (TNF-α) is one kind of cytokines which is related to inflammation and lipid metabolism. TNF-α cDNA was cloned from the liver of blunt snout bream (Megalobrama amblycephala) through real-time polymerase chain reaction (PCR) and rapid amplification of cDNA ends (RACE) methods. The full-length cDNA of TNF-α covered 1467 bp, with an open reading frame (ORF) of 723 bp, which encodes 240 amino acids. It possessed the TNF family signature IIIPDDGIYFVYSQ. After the lipopolysaccharide (LPS) challenge test, a graded tissue-specific expression pattern of TNF-α was observed and there was high expression abundance in the kidney, brain and liver. After 8 weeks feeding trial, liver samples, two groups fed with 6% and 11% lipid levels, were collected. The results showed that, for fish fed with high-fat diet, the triglyceride of serum and lipid content of liver were elevated. Furthermore, TNF-α and peroxisome proliferator-activated receptors (PPARα, β) mRNA expression of fish fed 11% lipid diet were significantly up-regulated (p < 0.05). Lipoprotein lipase (LPL) and PPARγ mRNA expression of fish fed 11% lipid lever diet were significantly decreased compared to those of fish fed 6% (p < 0.05). The differences between the various expression of related genes in the high and low fat groups demonstrated that TNF-α played a key role in lipid metabolism, which may have an influence on fat metabolism through reducing fat synthesis and strengthening the β-oxidation of fatty acid. These discrepancies warrant further research.
journal_name
J Appl Genetjournal_title
Journal of applied geneticsauthors
Zhou M,Mi HF,Liu WB,Wu YY,Wang KZ,Jiang GZdoi
10.1007/s13353-017-0390-9subject
Has Abstractpub_date
2017-08-01 00:00:00pages
381-391issue
3eissn
1234-1983issn
2190-3883pii
10.1007/s13353-017-0390-9journal_volume
58pub_type
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