Inhibition of pyruvate dehydrogenase kinase improves carbohydrate utilization in Nile tilapia by regulating PDK2/4-PDHE1α axis and insulin sensitivity

Autor: Yuan Luo, Wenhao Zhou, Ruixin Li, Samwel M. Limbu, Fang Qiao, Liqiao Chen, Meiling Zhang, Zhen-Yu Du
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Animal Nutrition, Vol 11, Iss , Pp 25-37 (2022)
Druh dokumentu: article
ISSN: 2405-6545
DOI: 10.1016/j.aninu.2022.06.011
Popis: Pyruvate dehydrogenase kinases (PDKs)-pyruvate dehydrogenase E1α subunit (PDHE1α) axis plays an important role in regulating glucose metabolism in mammals. However, the regulatory function of PDKs-PDHE1α axis in the glucose metabolism of fish is not well known. This study determined whether PDKs inhibition could enhance PDHE1α activity, and improve glucose catabolism in fish. Nile tilapia fingerlings (1.90 ± 0.11 g) were randomly divided into 4 treatments in triplicate (30 fish each) and fed control diet without dichloroacetate (DCA) (38% protein, 7% lipid and 45% corn starch) and the control diet supplemented with DCA, which inhibits PDKs through binding the allosteric sites, at 3.75 (DCA3.75), 7.50 (DCA7.50) and 11.25 g/kg (DCA11.25), for 6 wk. The results showed that DCA3.75, DCA7.50 and DCA11.25 significantly increased weight gain, carcass ratio and protein efficiency ratio (P
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