ArticleDiabetes & metabolism journal2024
Extracellular Vimentin Alters Energy Metabolism And Induces Adipocyte Hypertrophy.
Article in Diabetes & metabolism journal, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 9 citations in OpenAlex.
- The Mechanobiology of Adipocyte Hypertrophy: Cytoskeletal Remodelling as a Driver of Insulin Resistance in Obesity.Cell biochemistry and function · 2026Review
- Modulating Vimentin: A Systems-Level Therapeutic Strategy for Sepsis and Complex Diseases.Life (Basel, Switzerland) · 2026Article
- Novel secreted regulators of glucose and lipid metabolism in the development of metabolic diseases.Diabetologia · 2024Review
- The Functions of SARS-CoV-2 Receptors in Diabetes-Related Severe COVID-19.International journal of molecular sciences · 2024Review
- Mechanobiology in Metabolic Dysfunction-Associated Steatotic Liver Disease and Obesity.Current issues in molecular biology · 2024Review
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
backgruoundPrevious studies have reported that oxidative stress contributes to obesity characterized by adipocyte hypertrophy. However, mechanism has not been studied extensively. In the current study, we evaluated role of extracellular vimentin secreted by oxidized low-density lipoprotein (oxLDL) in energy metabolism in adipocytes.
methodsWe treated 3T3-L1-derived adipocytes with oxLDL and measured vimentin which was secreted in the media. We evaluated changes in uptake of glucose and free fatty acid, expression of molecules functioning in energy metabolism, synthesis of adenosine triphosphate (ATP) and lactate, markers for endoplasmic reticulum (ER) stress and autophagy in adipocytes treated with recombinant vimentin.
resultsAdipocytes secreted vimentin in response to oxLDL. Microscopic evaluation revealed that vimentin treatment induced increase in adipocyte size and increase in sizes of intracellular lipid droplets with increased intracellular triglyceride. Adipocytes treated with vimentin showed increased uptake of glucose and free fatty acid with increased expression of plasma membrane glucose transporter type 1 (GLUT1), GLUT4, and CD36. Vimentin treatment increased transcription of GLUT1 and hypoxia-inducible factor 1α (Hif-1α) but decreased GLUT4 transcription. Adipose triglyceride lipase (ATGL), peroxisome proliferator-activated receptor γ (PPARγ), sterol regulatory element-binding protein 1 (SREBP1), diacylglycerol O-acyltransferase 1 (DGAT1) and 2 were decreased by vimentin treatment. Markers for ER stress were increased and autophagy was impaired in vimentin-treated adipocytes. No change was observed in synthesis of ATP and lactate in the adipocytes treated with vimentin.
conclusionWe concluded that extracellular vimentin regulates expression of molecules in energy metabolism and promotes adipocyte hypertrophy. Our results show that vimentin functions in the interplay between oxidative stress and metabolism, suggesting a mechanism by which adipocyte hypertrophy is induced in oxidative stress.
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