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Adiponectin inhibits the production of TNF-alpha, IL-6 and chemokines by human lung macrophages
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  • Helene Salvator,
  • Stanislas Grassin-Delyle,
  • Marion Brollo,
  • Louis-jean Couderc,
  • Charlotte Abrial,
  • Tatiana Victoni,
  • Emmanuel Naline,
  • Philippe Devillier
Helene Salvator
Viorologie Immunologie Moleculaire (VIM) Suresnes - V2I- UMR 0892
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Stanislas Grassin-Delyle
Virologie et Immunologie Moleculaire (VIM) Suresnes, V2I - UMR-0892
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Marion Brollo
Virologie et Immunologie Moleculaire (VIM) Suresnes, V2I - UMR-0892
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Louis-jean Couderc
Virologie et Immunologie Moleculaire (VIM) Suresnes, V2I - UMR-0892
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Charlotte Abrial
Virologie et Immunologie Moleculaire (VIM) Suresnes, V2I - UMR-0892
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Tatiana Victoni
Virologie et Immunologie Moleculaire (VIM) Suresnes, V2I - UMR-0892
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Emmanuel Naline
Virologie et Immunologie Moleculaire (VIM) Suresnes, V2I - UMR-0892
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Philippe Devillier
Virologie et Immunologie Moleculaire (VIM) Suresnes, V2I - UMR-0892
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Abstract

Background and purpose: Obesity is associated with an elevated risk of severe respiratory infections and inflammatory lung diseases. The objectives were to investigate (i) the production of adiponectin by human lung explants, (ii) the expression of the adiponectin receptors AdipoR1 and AdipoR2 by human lung macrophages (LMs), and (iii) the impact of recombinant human adiponectin and a small-molecule APN receptor agonist (AdipoRon) on LMs activation. Experimental approach: Human parenchyma explants and LMs were isolated from patients operated for carcinoma. The LMs were cultured with recombinant adiponectin or AdipoRon and stimulated with LPS (10 ng.mL-1), poly(I:C) (10 µg.mL-1) or interleukin(IL)-4 (10 ng.mL-1) for 24 h. Cytokines or adiponectin, released by explants or LMs, were measured using ELISAs. The mRNA levels of AdipoR1 and AdipoR2 were determined using real-time quantitative PCR. AdipoRs expression was also assessed with confocal microscopy. Key results: Adiponectin was released by lung explants at a level negatively correlated with the donor’s body mass index. AdipoR1 and AdipoR2 were both expressed in LMs. Adiponectin (3-30 µg.mL-1) and AdipoRon (25-50 μM) markedly inhibited the LPS- and poly(I:C)-induced release of Tumor Necrosis Factor-alpha, IL-6 and chemokines (CCL3, CCL4, CCL5, CXCL1, CXCL8, CXCL10) and the IL-4-induced release of chemokines (CCL13, CCL17, CCL22) in a concentration-dependent manner. Recombinant adiponectin produced in mammalian cells (lacking low molecular weight isoforms) had no effects on LMs. Conclusions and implications: The low-molecular-weight isoforms of adiponectin and AdipoRon have an anti-inflammatory activity in the lung environment. Targeting adiponectin receptors may constitute a new means of controlling airways inflammation.