PMID- 25069821 OWN - NLM STAT- MEDLINE DCOM- 20151013 LR - 20141202 IS - 1096-7206 (Electronic) IS - 1096-7192 (Linking) VI - 113 IP - 3 DP - 2014 Nov TI - Paraoxonase 1 deficiency and hyperhomocysteinemia alter the expression of mouse kidney proteins involved in renal disease. PG - 200-6 LID - S1096-7192(14)00215-7 [pii] LID - 10.1016/j.ymgme.2014.07.011 [doi] AB - SCOPE: Hyperhomocysteinemia (HHcy) is associated with kidney disease and leads to atherosclerosis and thrombosis. Paraoxonase 1 (Pon1), a hydrolase that participates in homocysteine (Hcy) metabolism and is carried in the circulation on high-density lipoprotein, has also been linked to kidney disease and atherothrombosis. Pon1-knockout mice are susceptible to atherosclerosis and exhibit a kidney-associated phenotype, polyuria or urine dilution. We hypothesize that HHcy and Pon1 deficiency are toxic to kidney function because they impair metabolic pathways important for normal kidney homeostasis. METHODS AND RESULTS: We examined changes in the mouse kidney proteome induced by Pon1 gene deletion and dietary HHcy, using 2D IEF/SDS-PAGE gel electrophoresis and MALDI-TOF mass spectrometry. We found that the expression of ten mouse kidney proteins was altered by the Pon1(-/-) genotype or HHcy. Proteins involved in metabolism of lipid (ApoA-I), protein (Hspd1), carbohydrate (Pdhb, Fbp1-isoform2, Eno1), and energy (Ndufs8, Ldhd) were down-regulated. Proteins involved in lipid transport (Pebp1), oxidative stress response (Prdx2), and cellular detoxification (Glo1) were up-regulated. The kidney proteins altered by HHcy or Pon1 are also altered in renal disease. CONCLUSION: Our findings suggest that excess Hcy is toxic because it deregulates the expression of proteins involved in diverse cellular processes-from lipid, protein, carbohydrate, and energy metabolisms to detoxification and antioxidant defenses-that are essential for normal kidney homeostasis. Dysregulation of these processes can account for the involvement of HHcy and reduced Pon1 in kidney disease. Our findings also show that Pon1 plays an important role in maintaining normal kidney homeostasis. CI - Copyright (c) 2014 Elsevier Inc. All rights reserved. FAU - Suszynska-Zajczyk, Joanna AU - Suszynska-Zajczyk J AD - Institute of Bioorganic Chemistry, Poznan, Poland. FAU - Sikora, Marta AU - Sikora M AD - Institute of Bioorganic Chemistry, Poznan, Poland. FAU - Jakubowski, Hieronim AU - Jakubowski H AD - Institute of Bioorganic Chemistry, Poznan, Poland; Department of Biochemistry and Biotechnology, University of Life Sciences, Poznan, Poland; Department of Microbiology & Molecular Genetics, Rutgers-New Jersey Medical School, International Center for Public Health, Newark, NJ, USA. Electronic address: jakubows@njms.rutgers.edu. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140717 PL - United States TA - Mol Genet Metab JT - Molecular genetics and metabolism JID - 9805456 RN - 0 (Proteome) RN - EC 3.1.8.1 (Aryldialkylphosphatase) RN - EC 3.1.8.1 (PON1 protein, mouse) SB - IM MH - Animals MH - Aryldialkylphosphatase/*deficiency/genetics MH - Gene Expression MH - Hyperhomocysteinemia/*metabolism MH - Kidney/*metabolism MH - Mice, Inbred C57BL MH - Proteome/metabolism OTO - NOTNLM OT - High-methionine diet OT - Hyperhomocysteinemia OT - Kidney disease OT - Mouse kidney proteome OT - Paraoxonase 1 OT - Polyuria EDAT- 2014/07/30 06:00 MHDA- 2015/10/16 06:00 CRDT- 2014/07/30 06:00 PHST- 2014/06/04 00:00 [received] PHST- 2014/07/09 00:00 [revised] PHST- 2014/07/10 00:00 [accepted] PHST- 2014/07/30 06:00 [entrez] PHST- 2014/07/30 06:00 [pubmed] PHST- 2015/10/16 06:00 [medline] AID - S1096-7192(14)00215-7 [pii] AID - 10.1016/j.ymgme.2014.07.011 [doi] PST - ppublish SO - Mol Genet Metab. 2014 Nov;113(3):200-6. doi: 10.1016/j.ymgme.2014.07.011. Epub 2014 Jul 17.