Caprylic Acid Improves Lipid Metabolism, Suppresses the Inflammatory Response and Activates the ABCA1/p-JAK2/pSTAT3 Signaling Pathway in C57BL/6J Mice and RAW264.7 Cells  

作　　者：ZHANG Xin Sheng ZHANG Peng LIU Ying Hua XU Qing ZHANG Yong LI Hui Zi LIU Lu LIU Yu Meng YANG Xue Yan XUE Chang Yong 

机构地区：[1]Department of Nutrition,the First Medical Center of PLA General Hospital,Beijing 100853,China [2]Guizhou Crops of Chinese Armed Police Force,Guiyang 550001,Guizhou,China [3]Department of Nutrition,PLA Rocket Force Characteristic Medical Center,Beijing 100088,China

出　　处：《Biomedical and Environmental Sciences》2022年第2期95-106,共12页生物医学与环境科学（英文版）

基　　金：supported by the National Natural Science Fund of China[no.81703204].

摘　　要：Objective This study aimed to investigate the effects of caprylic acid(C8:0)on lipid metabolism and inflammation,and examine the mechanisms underlying these effects in mice and cells.Methods Fifty-six 6-week-old male C57BL/6J mice were randomly allocated to four groups fed a highfat diet(HFD)without or with 2%C8:0,palmitic acid(C16:0)or eicosapentaenoic acid(EPA).RAW246.7 cells were randomly divided into five groups:normal,lipopolysaccharide(LPS),LPS+C8:0,LPS+EPA and LPS+cAMP.The serum lipid profiles,inflammatory biomolecules,and ABCA1 and JAK2/STAT3 mRNA and protein expression were measured.Results C8:0 decreased TC and LDL-C,and increased the HDL-C/LDL-C ratio after injection of LPS.Without LPS,it decreased TC in mice(P<0.05).Moreover,C8:0 decreased the inflammatory response after LPS treatment in both mice and cells(P<0.05).Mechanistic investigations in C57BL/6J mouse aortas after injection of LPS indicated that C8:0 resulted in higher ABCA1 and JAK2/STAT3 expression than that with HFD,C16:0 and EPA,and resulted in lower TNF-α,NF-κB mRNA expression than that with HFD(P<0.05).In RAW 264.7 cells,C8:0 resulted in lower expression of pNF-κBP65 than that in the LPS group,and higher protein expression of ABCA1,p-JAK2 and p-STAT3 than that in the LPS and LPS+cAMP groups(P<0.05).Conclusion Our studies demonstrated that C8:0 may play an important role in lipid metabolism and the inflammatory response,and the mechanism may be associated with ABCA1 and the p-JAK2/p-STAT3 signaling pathway.

关 键 词：Caprylic acid Inflammatory cytokine ATP binding cassette transporter A1 Janus kinase 2 Signal transducer and activator of transcription 3 

分 类 号：R363[医药卫生—病理学]