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Renal Sodium Gradient Orchestrates a Dynamic Antibacterial Defense Zone.

Cell | 2017

Lower urinary tract infections are among the most common human bacterial infections, but extension to the kidneys is rare. This has been attributed to mechanical forces, such as urine flow, that prevent the ascent of bladder microbes. Here, we show that the regional hypersalinity, required for the kidney's urine-concentrating function, instructs epithelial cells to produce chemokines that localize monocyte-derived mononuclear phagocytes (MNPs) to the medulla. This hypersaline environment also increases the intrinsic bactericidal and neutrophil chemotactic activities of MNPs to generate a zone of defense. Because MNP positioning and function are dynamically regulated by the renal salt gradient, we find that patients with urinary concentrating defects are susceptible to kidney infection. Our work reveals a critical accessory role for the homeostatic function of a vital organ in optimizing tissue defense.

Pubmed ID: 28803730 RIS Download

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Associated grants

  • Agency: Medical Research Council, United Kingdom
    Id: MR/K023934/1
  • Agency: Medical Research Council, United Kingdom
    Id: MR/N024907/1

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Anti-MCP1 antibody [EP1361] (antibody)

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Anti-rabbit IgG (H+L) (DyLight 680 Conjugate) (antibody)

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NFAT5 Polyclonal Antibody (antibody)

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APC anti-human CD191 (CCR1) (antibody)

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APC anti-mouse CD68 (antibody)

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CD1a Antibody, PE (antibody)

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APC anti-human CD192 (CCR2) (antibody)

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CD45 PerCP-Cy5.5 120 tests (antibody)

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C.Cg-Tg(Itgax-Venus)1Mnz/J (organism)

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Anti-MCP1 antibody [EP1361] (antibody)

RRID:AB_2687891

This monoclonal targets MCP1

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Anti-MCP1 antibody [EP1361] (antibody)

RRID:AB_2687891

This monoclonal targets MCP1

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