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J Am Soc Nephrol. 2016 Oct;27(10):2997-3004. Epub 2016 Apr 7.

Nephron-Specific Deletion of Circadian Clock Gene Bmal1 Alters the Plasma and Renal Metabolome and Impairs Drug Disposition.

Author information

1
Department of Pharmacology and Toxicology and Institute of Evolutionary Physiology and Biochemistry, St. Petersburg, Russia.
2
Department of Pharmacology and Toxicology and.
3
Genomic Technologies Facility, University of Lausanne, Lausanne, Switzerland.
4
Department of Pharmacology and Toxicology and Department of Nephrology, Hypertension and Clinical Pharmacology, Inselspital, Bern, Switzerland; Department of Clinical Research, University of Bern, Bern, Switzerland.
5
Service of Biomedicine and.
6
Department of Nephrology, Tenon Hospital, Université Pierre et Marie Curie, Paris, France; and.
7
Service of Nephrology, Department of Medicine, Lausanne University Hospital (CHUV), Lausanne, Switzerland.
8
Department of Pharmacology and Toxicology and Service of Nephrology, Department of Medicine, Lausanne University Hospital (CHUV), Lausanne, Switzerland.
9
Department of Pharmacology and Toxicology and Labeled Research Team (ERL) 8228-U1138 équipe 3, Centre de Recherche des Cordeliers, Paris, France natsuko.tokonami@crc.jussieu.fr dmitri.firsov@unil.ch.
10
Department of Pharmacology and Toxicology and natsuko.tokonami@crc.jussieu.fr dmitri.firsov@unil.ch.

Abstract

The circadian clock controls a wide variety of metabolic and homeostatic processes in a number of tissues, including the kidney. However, the role of the renal circadian clocks remains largely unknown. To address this question, we performed a combined functional, transcriptomic, and metabolomic analysis in mice with inducible conditional knockout (cKO) of BMAL1, which is critically involved in the circadian clock system, in renal tubular cells (Bmal1lox/lox/Pax8-rtTA/LC1 mice). Induction of cKO in adult mice did not produce obvious abnormalities in renal sodium, potassium, or water handling. Deep sequencing of the renal transcriptome revealed significant changes in the expression of genes related to metabolic pathways and organic anion transport in cKO mice compared with control littermates. Furthermore, kidneys from cKO mice exhibited a significant decrease in the NAD+-to-NADH ratio, which reflects the oxidative phosphorylation-to-glycolysis ratio and/or the status of mitochondrial function. Metabolome profiling showed significant changes in plasma levels of amino acids, biogenic amines, acylcarnitines, and lipids. In-depth analysis of two selected pathways revealed a significant increase in plasma urea level correlating with increased renal Arginase II activity, hyperargininemia, and increased kidney arginine content as well as a significant increase in plasma creatinine concentration and a reduced capacity of the kidney to secrete anionic drugs (furosemide) paralleled by an approximate 80% decrease in the expression level of organic anion transporter 3 (SLC22a8). Collectively, these results indicate that the renal circadian clocks control a variety of metabolic/homeostatic processes at the intrarenal and systemic levels and are involved in drug disposition.

KEYWORDS:

arginase; circadian clock; kidney excretory rhythms; metabolome; organic anion transporter

PMID:
27056296
PMCID:
PMC5042670
DOI:
10.1681/ASN.2015091055
[Indexed for MEDLINE]
Free PMC Article

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