Genetic polymorphism in paraoxonase is a risk factor for childhood focal segmental glomerulosclerosis

Yaacov Frishberg*, Helen Toledano, Rachel Becker-Cohen, Elad Feigin, David Halle

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Focal segmental glomerulosclerosis (FSGS) is an important cause of end-stage renal failure (ESRF) in children. Our previous studies have shown that Arab children in Israel have a worse prognosis compared with Jewish patients despite similar clinical presentation and management. Progression of proteinuric glomerular diseases has been associated with alterations in lipid metabolism, and similarities have been drawn between the mechanisms underlying atherosclerosis and glomerulosclerosis. Paraoxonase (PON) is a high-density lipoprotein (HDL)-associated enzyme involved in preventing the oxidation of low-density lipoprotein (LDL), and an association has been shown between two genetic polymorphisms in PON1 and the risk of coronary artery disease. The aim of this study was to determine the frequency of these genetic polymorphisms in PON1 in Arab and Jewish children with FSGS and to determine any association with severity of outcome. Forty-seven children (21 Arab and 26 Jewish) with biopsy-proven FSGS and 274 healthy controls of matching ethnic origin were studied. The glutamine (A)-192-arginine (B) and the methionine (M)-55-leucine (L) polymorphisms were analyzed. The frequency of the A allele was similar in patients and controls (0.68 versus 0.71), as was that of the L allele (0.63 versus 0.6). When subgroups were analyzed, the prevalence of the LL genotype in Arab patients was significantly greater than in Jewish patients (57.1% versus 26.9%, P < 0.05) and Arab controls (57.1% versus 28.9%, P < 0.03). A trend in association was found between homozygosity for the L allele and progression of renal disease in Arab children. Homozygosity for the L allele is a risk factor for developing FSGS in Arab children and may be associated with a worse prognosis. (C) 2000 by the National Kidney Foundation, Inc.

Original languageEnglish
Pages (from-to)1253-1261
Number of pages9
JournalAmerican Journal of Kidney Diseases
Volume36
Issue number6
DOIs
StatePublished - 2000
Externally publishedYes

Funding

FundersFunder number
Mirsky Foundation
Ministry of Health, State of Israel

    Keywords

    • Childhood
    • Focal segmental glomerulosclerosis (FSGS)
    • Paraoxonase
    • Polymorphism
    • Risk factor, ethnicity

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