ABC transporter expression profiling after ischemic reperfusion injury in mouse kidney

Kidney Int. 2006 Jun;69(12):2186-93. doi: 10.1038/sj.ki.5000407. Epub 2006 Apr 12.

Abstract

Renal ATP binding cassette (ABC) transporters have an important role in the elimination of metabolic waste products and compounds foreign to the body. The kidney has the ability to tightly control the expression of these efflux transporters to maintain homeostasis, and as a major mechanism of adaptation to environmental stress. In the present study, we investigated the expression of 45 ABC transporter genes in the mouse kidney under basal conditions, after induction of ischemia and after regeneration. Two days after clamping, mice showed a 76% decrease in renal creatinine clearance, which improved clearly within 7 days. This was confirmed by histological examinations. Seven days after ischemia, real-time quantitative Polymerase chain reaction data showed that transcript abundance of abcb1, abcb11, and abcc4 was increased, and that of abca3, abcc2, and abcg2 decreased. Expression of all transporters returned to baseline after 14 days, except for abcb11, which was reduced. Abcb11 is the major liver canalicular bile salt export pump. Here we show for the first time expression in the kidney and localization of the transporter to the apical membrane of proximal tubules. The presence of another novel renal transporter, abca3, was confirmed by Western blotting. Immunohistochemistry showed that abca3 is localized to the peritubular capillaries and apical membrane of proximal tubules. In conclusion, after inducing ischemic reperfusion injury in the kidney, ABC transporters appear to be differentially regulated, which might be associated with the renal regeneration process. Furthermore, we showed for the first time expression and subcellular localization of abcb11 and abca3 in mouse kidney.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • ATP Binding Cassette Transporter, Subfamily B
  • ATP Binding Cassette Transporter, Subfamily B, Member 1
  • ATP Binding Cassette Transporter, Subfamily B, Member 11
  • ATP Binding Cassette Transporter, Subfamily G, Member 2
  • ATP-Binding Cassette Transporters / analysis
  • ATP-Binding Cassette Transporters / biosynthesis
  • ATP-Binding Cassette Transporters / genetics*
  • Animals
  • Blotting, Western
  • Gene Expression Profiling*
  • Gene Expression Regulation
  • Immunohistochemistry
  • Kidney / chemistry
  • Kidney / pathology*
  • Kidney Tubules, Proximal / chemistry
  • Kidney Tubules, Proximal / pathology
  • Male
  • Membrane Transport Proteins / analysis
  • Membrane Transport Proteins / genetics
  • Mice
  • Mice, Inbred Strains
  • Multidrug Resistance-Associated Proteins / analysis
  • Multidrug Resistance-Associated Proteins / genetics
  • Reperfusion Injury / genetics*
  • Reperfusion Injury / pathology*
  • Reverse Transcriptase Polymerase Chain Reaction

Substances

  • ATP Binding Cassette Transporter, Subfamily B
  • ATP Binding Cassette Transporter, Subfamily B, Member 1
  • ATP Binding Cassette Transporter, Subfamily B, Member 11
  • ATP Binding Cassette Transporter, Subfamily G, Member 2
  • ATP-Binding Cassette Transporters
  • Abca3 protein, mouse
  • Abcb11 protein, mouse
  • Abcc4 protein, mouse
  • Abcg2 protein, mouse
  • Membrane Transport Proteins
  • Multidrug Resistance-Associated Proteins
  • multidrug resistance-associated protein 2
  • Abcb1b protein, mouse