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Adipose Tissue-Derived CCL5 Enhances Local Pro-Inflammatory Monocytic MDSCs Accumulation and Inflammation via CCR5 Receptor in High-Fat Diet-Fed Mice.
Chan, Pei-Chi; Lu, Chieh-Hua; Chien, Hung-Che; Tian, Yu-Feng; Hsieh, Po-Shiuan.
Afiliação
  • Chan PC; Department of Physiology & Biophysics, National Defense Medical Center (NDMC), Taipei 114, Taiwan.
  • Lu CH; Division of Endocrinology and Metabolism, Department of Internal Medicine, Tri-Service General Hospital, NDMC, Taipei 114, Taiwan.
  • Chien HC; Department of Physiology & Biophysics, National Defense Medical Center (NDMC), Taipei 114, Taiwan.
  • Tian YF; Department of Surgery, Chi Mei Medical Center, Tainan 717, Taiwan.
  • Hsieh PS; Department of Physiology & Biophysics, National Defense Medical Center (NDMC), Taipei 114, Taiwan.
Int J Mol Sci ; 23(22)2022 Nov 17.
Article em En | MEDLINE | ID: mdl-36430701
The C-C chemokine motif ligand 5 (CCL5) and its receptors have recently been thought to be substantially involved in the development of obesity-associated adipose tissue inflammation and insulin resistance. However, the respective contributions of tissue-derived and myeloid-derived CCL5 to the etiology of obesity-induced adipose tissue inflammation and insulin resistance, and the involvement of monocytic myeloid-derived suppressor cells (MDSCs), remain unclear. This study used CCL5-knockout mice combined with bone marrow transplantation (BMT) and mice with local injections of shCCL5/shCCR5 or CCL5/CCR5 lentivirus into bilateral epididymal white adipose tissue (eWAT). CCL5 gene deletion significantly ameliorated HFD-induced inflammatory reactions in eWAT and protected against the development of obesity and insulin resistance. In addition, tissue (non-hematopoietic) deletion of CCL5 using the BMT method not only ameliorated adipose tissue inflammation by suppressing pro-inflammatory M-MDSC (CD11b+Ly6G-Ly6Chi) accumulation and skewing local M1 macrophage polarization, but also recruited reparative M-MDSCs (CD11b+Ly6G-Ly6Clow) and M2 macrophages to the eWAT of HFD-induced obese mice, as shown by flow cytometry. Furthermore, modulation of tissue-derived CCL5/CCR5 expression by local injection of shCCL5/shCCR5 or CCL5/CCR5 lentivirus substantially impacted the distribution of pro-inflammatory and reparative M-MDSCs as well as macrophage polarization in bilateral eWAT. These findings suggest that an obesity-induced increase in adipose tissue CCL5-mediated signaling is crucial in the recruitment of tissue M-MDSCs and their trans-differentiation to tissue pro-inflammatory macrophages, resulting in adipose tissue inflammation and insulin resistance.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Tecido Adiposo / Quimiocina CCL5 / Receptores CCR5 / Células Supressoras Mieloides / Inflamação Idioma: En Ano de publicação: 2022 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Tecido Adiposo / Quimiocina CCL5 / Receptores CCR5 / Células Supressoras Mieloides / Inflamação Idioma: En Ano de publicação: 2022 Tipo de documento: Article