Skip to Main content Skip to Navigation
Journal articles

Chemokine Expression in Inflamed Adipose Tissue Is Mainly Mediated by NF-κB

Abstract : Immune cell infiltration of expanding adipose tissue during obesity and its role in insulin resistance has been described and involves chemokines. However, studies so far have focused on a single chemokine or its receptor (especially CCL2 and CCL5) whereas redundant functions of chemokines have been described. The objective of this work was to explore the expression of chemokines in inflamed adipose tissue in obesity. Human and mouse adipocytes were analyzed for expression of chemokines in response to inflammatory signal (TNF-a) using microarrays and gene set enrichment analysis. Gene expression was verified by qRT-PCR. Chemokine protein was determined in culture medium with ELISA. Chemokine expression was investigated in human subcutaneous adipose tissue biopsies and mechanism of chemokine expression was investigated using chemical inhibitors and cellular and animal transgenic models. Chemokine encoding genes were the most responsive genes in TNF-a treated human and mouse adipocytes. mRNA and protein of 34 chemokine genes were induced in a dose-dependent manner in the culture system. Furthermore, expression of those chemokines was elevated in human obese adipose tissue. Finally, chemokine expression was reduced by NF-kB inactivation and elevated by NF-kB activation. Our data indicate that besides CCL2 and CCL5, numerous other chemokines such as CCL19 are expressed by adipocytes under obesity-associated chronic inflammation. Their expression is regulated predominantly by NF-kB. Those chemokines could be involved in the initiation of infiltration of leukocytes into obese adipose tissue.
Complete list of metadatas

Cited literature [44 references]  Display  Hide  Download

https://hal-amu.archives-ouvertes.fr/hal-01771770
Contributor : Administrateur Hal Amu <>
Submitted on : Thursday, April 19, 2018 - 6:06:31 PM
Last modification on : Wednesday, September 2, 2020 - 4:02:45 PM
Long-term archiving on: : Tuesday, September 18, 2018 - 4:40:23 PM

File

journal.pone.0066515.PDF
Publication funded by an institution

Licence


Distributed under a Creative Commons Attribution 4.0 International License

Identifiers

Collections

Citation

Franck Tourniaire, Beatrice Romier-Crouzet, Jong Han Lee, Julie Marcotorchino, Erwan Gouranton, et al.. Chemokine Expression in Inflamed Adipose Tissue Is Mainly Mediated by NF-κB. PLoS ONE, Public Library of Science, 2013, 8 (6), pp.e66515. ⟨10.1371/journal.pone.0066515⟩. ⟨hal-01771770⟩

Share

Metrics

Record views

695

Files downloads

424