Cited by 53Adipokines, Inflammation, and Metabolic DiseasesAdipose Tissue and MetabolismPeroxisome Proliferator-Activated Receptors

LECT2 promotes inflammation and insulin resistance in adipocytes via P38 pathways

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Jung, Tae Woo, Chung, Yoon Hee, Kim, Hyoung-Chun, Abd El-Aty, A M, Jeong, Ji Hoon·2018·Journal of Molecular Endocrinology

Abstract

Leukocyte cell-derived chemotaxin 2 (LECT2) is a recently identified novel hepatokine that causes insulin resistance in skeletal muscle by activating c-Jun N-terminal kinase (JNK), thereby driving atherosclerotic inflammation. However, the role of LECT2 in inflammation and insulin resistance in adipocytes has not been investigated. In this study, we report that LECT2 treatment of differentiated 3T3-L1 cells stimulates P38 phosphorylation in a dose-dependent manner. LECT2 also enhanced inflammation markers such as IκB phosphorylation, nuclear factor kappa beta (NF-κB) phosphorylation and IL-6 expression. Moreover, LECT2 treatment impaired insulin signaling in differentiated 3T3-L1 cells, as evidenced by the decreased levels of insulin receptor substrate (IRS-1) and Akt phosphorylation and reduced insulin-stimulated glucose uptake. Furthermore, LECT2 augmented lipid accumulation during 3T3-L1 cell differentiation by activating SREBP1c-mediated signaling. All these effects were significantly abrogated by siRNA-mediated silencing of P38, CD209 expression or a JNK inhibitor. Our findings suggest that LECT2 stimulates inflammation and insulin resistance in adipocytes via activation of a CD209/P38-dependent pathway. Thus, these results suggest effective therapeutic targets for treating inflammation-mediated insulin resistance.

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  • LECT2 treatment impairs insulin signaling in differentiated 3T3-L1 cells by decreasing levels of insulin receptor and AKT phosphorylation, reducing insulin-stimulated glucose uptake.

    “Moreover, LECT2 treatment impaired insulin signaling in differentiated 3T3-L1 cells by decreasing levels of the insulin receptor and AKT phosphorylation, reducing insulin-stimulated glucose uptake [250].”

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Authors
Jung, T. W., Chung, Y. H., Kim, H.-C., Abd El-Aty, A. M., & Jeong, J. H.
Affiliations
  • Seoul National University Bundang Hospital (KR)
  • Chung-Ang University (KR)
  • Kangwon National University (KR)
  • 4Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
Venue
Journal of Molecular Endocrinology
Published
2018-07
Volume
61
Issue
1
Pages
37-45
ISSN
  • 0952-5041 (ISSN-L)
  • 1479-6813
OpenAlex
W2796814186
Cited by
53
References
36
Citations by year
2026: 5 · 2025: 2 · 2024: 10 · 2023: 8 · 2022: 10 · 2021: 10 · 2020: 4 · 2019: 4
FWCI
3.51
Type
journal article
Language
en
Open access
Locations
  • Journal of Molecular Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Research Foundation
  • Ministry of Science, ICT and Future Planning (2016R1C1B2012674)
Topics
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
LECT2, hepatokines, insulin resistance, adipocytes, adipose tissue inflammation, p38 MAPK, DC-SIGN, JNK, NF-κB, IκB phosphorylation, interleukin-6, IRS-1, Akt signaling, insulin-stimulated glucose uptake, lipid accumulation, SREBP-1c, 3T3-L1 adipocytes
MeSH terms
Adipose Tissue, Animals, Inflammation, Insulin, Insulin Resistance, Adipocytes, MAP Kinase Signaling System, Intercellular Signaling Peptides and Proteins, 3T3-L1 Cells, Mice

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