Cited by 78Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismLipid metabolism and disorders

Myonectin deletion promotes adipose fat storage and reduces liver steatosis

Open access
Little, Hannah C., Rodriguez, Susana, Lei, Xia, Tan, Stefanie Y., Stewart, Ashley N., Sahagun, Ageline, Sarver, Dylan C., William Wong, G.·2019·The FASEB Journal

Abstract

We recently described myonectin (also known as erythroferrone) as a novel skeletal muscle‐derived myokine with metabolic functions. Here, we use a genetic mouse model to determine myonectin's requirement for metabolic homeostasis. Female myonectin‐deficient mice had larger gonadal fat pads and developed mild insulin resistance when fed a high‐fat diet (HFD) and had reduced food intake during refeeding after an unfed period but were otherwise indistinguishable from wild‐type littermates. Male mice lacking myonectin, however, had reduced physical activity when fed ad libitum and in the postprandial state but not during the unfed period. When stressed with an HFD, myonectin‐knockout male mice had significantly elevated VLDL‐triglyceride (TG) and strikingly impaired lipid clearance from circulation following an oral lipid load. Fat distribution between adipose and liver was also altered in myonectin‐deficient male mice fed an HFD. Greater fat storage resulted in significantly enlarged adipocytes and was associated with increased postprandial lipoprotein lipase activity in adipose tissue. Parallel to this was a striking reduction in liver steatosis due to significantly reduced TG accumulation. Liver metabolite profiling revealed additional significant changes in bile acids and 1‐carbon metabolism pathways. Combined, our data affirm the physiologic importance of myonectin in regulating local and systemic lipid metabolism.—Little, H. C., Rodriguez, S., Lei, X., Tan, S. Y., Stewart, A. N., Sahagun, A., Sarver, D. C., Wong, G. W. Myonectindeletion promotes adipose fat storage and reduces liver steatosis. FASEB J. 33, 8666–8687 (2019). www.fasebj.org

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Crossref · 10.1096/fj.201900520r

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  • In myonectin knockout mice, WAT lipolysis is unaffected, but dietary lipid clearance is impaired versus wild-type, leading to increased WAT mass and decreased liver steatosis.

    “in myonectin knockout mice, WAT lipolysis is unaffected; however, dietary lipid clearance is impaired compared with lipid clearance in wild-type mice, resulting in increased WAT mass and decreased liver steatosis82.”

    From Exerkines in health, resilience and disease (2022) · cites this paper as [82]

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Authors
Little, H. C., Rodriguez, S., Lei, X., Tan, S. Y., Stewart, A. N., Sahagun, A., Sarver, D. C., & William Wong, G.
Affiliations
  • Johns Hopkins University (US)
  • Department of Physiology Johns Hopkins University School of Medicine Baltimore Maryland USA
Venue
The FASEB Journal
Publisher
Wiley
Published
2019-04-19
Volume
33
Issue
7
Pages
8666-8687
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2940313036
Cited by
78
References
78
Citations by year
2026: 8 · 2025: 12 · 2024: 6 · 2023: 13 · 2022: 11 · 2021: 13 · 2020: 14 · 2019: 1
FWCI
7.42
Type
journal article
Language
en
Open access
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK084171)
  • National Institute of General Medical Sciences (T32 GM007445)
  • American Diabetes Association (1-18-PMF-022)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Lipid metabolism and disorders
Keywords
myonectin, erythroferrone, myokines, skeletal muscle, hepatic steatosis, insulin resistance, high-fat diet, lipid metabolism, VLDL triglycerides, lipoprotein lipase, bile acids, one-carbon metabolism, sex differences, adipocyte size, lipid clearance
MeSH terms
Adipose Tissue, Animals, Fatty Liver, Female, Homeostasis, Insulin, Insulin Resistance, Lipoproteins, VLDL, Liver, Male, Mice, Inbred C57BL, Muscle Proteins, Obesity, Triglycerides, Cytokines, Adipocytes, Mice, Knockout, Muscle, Skeletal, Adiposity, Lipid Metabolism, Mice, Diet, High-Fat

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