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Methionine‐ and Choline‐Deficient Diet Enhances Adipose Lipolysis and Leptin Release in aP2 ‐Cre Fatp4‐Knockout Mice
Author(s) -
Cheng Yuting,
GanSchreier Hongying,
Seeßle Jessica,
Staffer Simone,
TumaKellner Sabine,
Khnykin Denis,
Stremmel Wolfgang,
Merle Uta,
Herrmann Thomas,
Chamulitrat Walee
Publication year - 2020
Publication title -
molecular nutrition and food research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.495
H-Index - 131
eISSN - 1613-4133
pISSN - 1613-4125
DOI - 10.1002/mnfr.202000361
Subject(s) - lipolysis , endocrinology , medicine , choline , leptin , adipose tissue , white adipose tissue , chemistry , methionine , fatty liver , adipose triglyceride lipase , biology , biochemistry , obesity , disease , amino acid
Scope Inadequate intake of choline commonly leads to liver diseases. Methionine‐ and choline‐deficient diets (MCDD) induce fatty liver in mice which is partly mediated by triglyceride (TG) lipolysis in white adipose tissues (WATs). Because Fatp4 knockdown has been shown to increase adipocyte lipolysis in vitro, here, the effects of MCDD on WAT lipolysis in aP2 ‐Cre Fatp4‐knockout (Fatp4 A−/− ) mice are determined. Methods and Results Isolated WATs of Fatp4 A−/− mice exposed to MCD medium show an increase in lipolysis, and the strongest effect is noted on glycerol release from subcutaneous fat. Fatp4 A−/− mice fed with MCDD for 4 weeks show an increase in serum glycerol, TG, and leptin levels associated with the activation of hormone‐sensitive lipase in subcutaneous fat. Chow‐fed Fatp4 A−/− mice also show an increase in serum leptin and very‐low‐density lipoproteins as well as liver phosphatidylcholine and sphingomyelin levels. Both chow‐ and MCDD‐fed Fatp4 A−/− mice show a decrease in serum ketone and WAT sphingomyelin levels which supports a metabolic shift to TG for subsequent WAT lipolysis Conclusions Adipose Fatp4 deficiency leads to TG lipolysis and leptin release, which are exaggerated by MCDD. The data imply hyperlipidemia risk by a low dietary choline intake and gene mutations that increase adipose TG levels.