ZFIN ID: ZDB-PUB-140108-19
ADCK4 mutations promote steroid-resistant nephrotic syndrome through CoQ10 biosynthesis disruption
Ashraf, S., Gee, H.Y., Woerner, S., Xie, L.X., Vega-Warner, V., Lovric, S., Fang, H., Song, X., Cattran, D.C., Avila-Casado, C., Paterson, A.D., Nitschké, P., Bole-Feysot, C., Cochat, P., Esteve-Rudd, J., Haberberger, B., Allen, S.J., Zhou, W., Airik, R., Otto, E.A., Barua, M., Al-Hamed, M.H., Kari, J.A., Evans, J., Bierzynska, A., Saleem, M.A., Böckenhauer, D., Kleta, R., El Desoky, S., Hacihamdioglu, D.O., Gok, F., Washburn, J., Wiggins, R.C., Choi, M., Lifton, R.P., Levy, S., Han, Z., Salviati, L., Prokisch, H., Williams, D.S., Pollak, M., Clarke, C.F., Pei, Y., Antignac, C., and Hildebrandt, F.
Date: 2013
Source: J. Clin. Invest.   123(12): 5179-5189 (Journal)
Registered Authors: Zhou, Weibin
Keywords: none
MeSH Terms:
  • Adolescent
  • Adrenal Cortex Hormones/pharmacology
  • Adrenal Cortex Hormones/therapeutic use
  • Amino Acid Sequence
  • Animals
  • Cells, Cultured
  • Child
  • Consanguinity
  • Conserved Sequence
  • DNA Mutational Analysis
  • Disease Models, Animal
  • Drosophila Proteins/antagonists & inhibitors
  • Drosophila Proteins/genetics
  • Drug Resistance
  • Exome/genetics
  • Fibroblasts/metabolism
  • Gene Knockdown Techniques
  • Humans
  • Mitochondria/physiology
  • Molecular Sequence Data
  • Mutation
  • Nephrotic Syndrome/drug therapy
  • Nephrotic Syndrome/genetics*
  • Nephrotic Syndrome/metabolism
  • Nephrotic Syndrome/pathology
  • Podocytes/metabolism
  • Podocytes/ultrastructure
  • Protein Kinases/deficiency
  • Protein Kinases/genetics
  • Protein Kinases/physiology*
  • Rats
  • Sequence Alignment
  • Sequence Homology, Amino Acid
  • Ubiquinone/analogs & derivatives*
  • Ubiquinone/antagonists & inhibitors
  • Ubiquinone/biosynthesis
  • Ubiquinone/metabolism
  • Ubiquinone/therapeutic use
  • Young Adult
  • Zebrafish/embryology
  • Zebrafish/genetics
  • Zebrafish Proteins/antagonists & inhibitors
  • Zebrafish Proteins/genetics
PubMed: 24270420 Full text @ J. Clin. Invest.
FIGURES
ABSTRACT

Identification of single-gene causes of steroid-resistant nephrotic syndrome (SRNS) has furthered the understanding of the pathogenesis of this disease. Here, using a combination of homozygosity mapping and whole human exome resequencing, we identified mutations in the aarF domain containing kinase 4 (ADCK4) gene in 15 individuals with SRNS from 8 unrelated families. ADCK4 was highly similar to ADCK3, which has been shown to participate in coenzyme Q10 (CoQ10) biosynthesis. Mutations in ADCK4 resulted in reduced CoQ10 levels and reduced mitochondrial respiratory enzyme activity in cells isolated from individuals with SRNS and transformed lymphoblasts. Knockdown of adck4 in zebrafish and Drosophila recapitulated nephrotic syndrome-associated phenotypes. Furthermore, ADCK4 was expressed in glomerular podocytes and partially localized to podocyte mitochondria and foot processes in rat kidneys and cultured human podocytes. In human podocytes, ADCK4 interacted with members of the CoQ10 biosynthesis pathway, including COQ6, which has been linked with SRNS and COQ7. Knockdown of ADCK4 in podocytes resulted in decreased migration, which was reversed by CoQ10 addition. Interestingly, a patient with SRNS with a homozygous ADCK4 frameshift mutation had partial remission following CoQ10 treatment. These data indicate that individuals with SRNS with mutations in ADCK4 or other genes that participate in CoQ10 biosynthesis may be treatable with CoQ10.

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