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J Am Soc Nephrol. 2017 Mar;28(3):823-836. doi: 10.1681/ASN.2015080898. Epub 2016 Sep 12.

Mitogen-Activated Protein Kinase 14 Promotes AKI.

Author information

1
Instituto Investigacion Sanitaria-Fundacion Jimenez Diaz-Universidad Autonoma de Madrid and Fundacion Renal Iñigo Alvarez de Toledo-Instituto Reina Sofia de Investigacion Nefrologica, Madrid, Spain; mdsanchez@fjd.es aortiz@fjd.es.
2
Red de Investigacion Rena, Madrid, Spain.
3
Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom.
4
Instituto Investigacion Sanitaria-Fundacion Jimenez Diaz-Universidad Autonoma de Madrid and Fundacion Renal Iñigo Alvarez de Toledo-Instituto Reina Sofia de Investigacion Nefrologica, Madrid, Spain.
5
Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas de la Universidad Autonoma de Madrid, Madrid, Spain.
6
Mosaiques diagnostics GmbH, Hannover, Germany.
7
Unidad de Nefrología, Instituto de Medicina, Universidad Austral de Chile, Valdivia, Chile; and.
8
Biomedical Research Foundation Academy of Athens, Athens, Greece.

Abstract

An improved understanding of pathogenic pathways in AKI may identify novel therapeutic approaches. Previously, we conducted unbiased liquid chromatography-tandem mass spectrometry-based protein expression profiling of the renal proteome in mice with acute folate nephropathy. Here, analysis of the dataset identified enrichment of pathways involving NFκB in the kidney cortex, and a targeted data mining approach identified components of the noncanonical NFκB pathway, including the upstream kinase mitogen-activated protein kinase kinase kinase 14 (MAP3K14), the NFκB DNA binding heterodimer RelB/NFκB2, and proteins involved in NFκB2 p100 ubiquitination and proteasomal processing to p52, as upregulated. Immunohistochemistry localized MAP3K14 expression to tubular cells in acute folate nephropathy and human AKI. In vivo, kidney expression levels of NFκB2 p100 and p52 increased rapidly after folic acid injection, as did DNA binding of RelB and NFκB2, detected in nuclei isolated from the kidneys. Compared with wild-type mice, MAP3K14 activity-deficient aly/aly (MAP3K14aly/aly) mice had less kidney dysfunction, inflammation, and apoptosis in acute folate nephropathy and less kidney dysfunction and a lower mortality rate in cisplatin-induced AKI. The exchange of bone marrow between wild-type and MAP3K14aly/aly mice did not affect the survival rate of either group after folic acid injection. In cultured tubular cells, MAP3K14 small interfering RNA targeting decreased inflammation and cell death. Additionally, cell culture and in vivo studies identified the chemokines MCP-1, RANTES, and CXCL10 as MAP3K14 targets in tubular cells. In conclusion, MAP3K14 promotes kidney injury through promotion of inflammation and cell death and is a promising novel therapeutic target.

KEYWORDS:

acute kidney injury; chemokine; kidney tubule; renal failure; renal injury

PMID:
27620989
PMCID:
PMC5328147
DOI:
10.1681/ASN.2015080898
[Indexed for MEDLINE]
Free PMC Article

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