4.4 Article

Serum Fibroblast Growth Factor 21 Level After an Oral Fat Tolerance Test is Related to Postprandial Free Fatty Acid Level

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DIABETES METABOLIC SYNDROME AND OBESITY
卷 16, 期 -, 页码 1567-1576

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DOVE MEDICAL PRESS LTD
DOI: 10.2147/DMSO.S410457

关键词

fibroblast growth factor 21; free fatty acid; lipids; dyslipidemia; postprandial state; oral fat tolerance test

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This study aimed to investigate the relationship between blood lipids and fibroblast growth factor 21 (FGF21) in the postprandial period. Changes in blood lipid levels after an oral fat tolerance test (OFTT) and the short-term effects on FGF21 were observed. The fasting FGF21 levels showed a strong positive correlation with free fatty acid (FFA) levels. During OFTT, changes in FGF21 levels were closely associated with alterations in FFA. The importance of this study is rated 8 out of 10.
Purpose: The relationship between blood lipids and fibroblast growth factor (FGF) 21 in the postprandial period remains unclear. To investigate this, we observed the changes in blood lipid levels after an oral fat tolerance test (OFTT) and examined the short-term effects on FGF21.Patients and Methods: A total of 158 non-diabetic adult volunteers who underwent OFTT were randomly recruited from the Hebei General Hospital. Participants were stratified into three groups according to fasting and 4-h postprandial triglyceride levels: normal fat tolerance (NFT), impaired fat tolerance (IFT), and hypertriglyceridemia (HTG). Blood samples were collected at 2-h intervals for 6 h. Circulating total cholesterol levels, triglycerides, high-density lipoprotein-cholesterol, low-density lipoprotein-cholesterol, free fatty acids (FFA), and FGF21 were assessed.Results: Fasting FGF21 levels increased progressively in the NFT, IFT, and HTG groups and were strongly correlated with FFA levels (r=0.531, P < 0.001). During the OFTT, the FFA and FGF21 levels decreased and then increased after reaching a nadir at 2 and 4 h, respectively. After adjusting for potential risk factors, the FFA incremental area under the curve (iAUC) was an independent influencing factor of FGF21 iAUC (P=0.005).Conclusion: Fasting FGF21 levels showed a strong positive correlation with FFA. During OFTT, changes in FGF21 levels were closely associated with alterations in FFA exogenously changed by OFTT. Moreover, they were linearly related to each other. Therefore, the serum FGF21 level is positively correlated to the FFA level in the postprandial period.

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