Endotoxin preconditioning reprograms S1 tubules and macrophages to protect the kidney

Takashi Hato, Amy Zollman, Zoya Plotkin, Tarek Ashkar (El-Achkar), Bernhard Maier, S. Louise Pay, Shataakshi Dube, Pablo Cabral, Momoko Yoshimoto, Jeanette McClintick, Pierre Dagher

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Preconditioning with a low dose of endotoxin confers unparalleled protection against otherwise lethal models of sepsis. The mechanisms of preconditioning have been investigated extensively in isolated immune cells such as macrophages. However, the role of tissue in mediating the protective response generated by preconditioning remains unknown. Here, using the kidney as a model organ, we investigated cell type–specific responses to preconditioning. Compared with preadministration of vehicle, endotoxin preconditioning in the cecal ligation and puncture mouse model of sepsis led to significantly enhanced survival and reduced bacterial load in several organs. Furthermore, endotoxin preconditioning reduced serum levels of proinflammatory cytokines, upregulated molecular pathways involved in phagocytosis, and prevented the renal function decline and injury induced in mice by a toxic dose of endotoxin. The protective phenotype involved the clustering of macrophages around S1 segments of proximal tubules, and full renal protection required both macrophages and renal tubular cells. Using unbiased S1 transcrip-tomic and tissue metabolomic approaches, we identified multiple protective molecules that were operative in preconditioned animals, including molecules involved in antibacterial defense, redox balance, and tissue healing. We conclude that preconditioning reprograms macrophages and tubules to generate a protective environment, in which tissue health is preserved and immunity is controlled yet effective. Endotoxin preconditioning can thus be used as a discovery platform, and understanding the role and participation of both tissue and macrophages will help refine targeted therapies for sepsis.

Original languageEnglish (US)
Pages (from-to)104-117
Number of pages14
JournalJournal of the American Society of Nephrology
Volume29
Issue number1
DOIs
StatePublished - Jan 1 2018

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Endotoxins
Macrophages
Kidney
Sepsis
Proximal Kidney Tubule
Metabolomics
Bacterial Load
Poisons
Punctures
Phagocytosis
Oxidation-Reduction
Ligation
Cluster Analysis
Immunity
Cytokines
Phenotype
Health
Wounds and Injuries
Serum
Therapeutics

ASJC Scopus subject areas

  • Nephrology

Cite this

Endotoxin preconditioning reprograms S1 tubules and macrophages to protect the kidney. / Hato, Takashi; Zollman, Amy; Plotkin, Zoya; Ashkar (El-Achkar), Tarek; Maier, Bernhard; Louise Pay, S.; Dube, Shataakshi; Cabral, Pablo; Yoshimoto, Momoko; McClintick, Jeanette; Dagher, Pierre.

In: Journal of the American Society of Nephrology, Vol. 29, No. 1, 01.01.2018, p. 104-117.

Research output: Contribution to journalArticle

Hato, Takashi ; Zollman, Amy ; Plotkin, Zoya ; Ashkar (El-Achkar), Tarek ; Maier, Bernhard ; Louise Pay, S. ; Dube, Shataakshi ; Cabral, Pablo ; Yoshimoto, Momoko ; McClintick, Jeanette ; Dagher, Pierre. / Endotoxin preconditioning reprograms S1 tubules and macrophages to protect the kidney. In: Journal of the American Society of Nephrology. 2018 ; Vol. 29, No. 1. pp. 104-117.
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