A Case of Lipoprotein Glomerulopathy with apoE Chicago and apoE (Glu3Lys) Treated with Fenofibrate

Hitoshi Kodera, Yasuhide Mizutani, Satoshi Sugiyama, Toshio Miyata, Takashi Ehara, Akira Matsunaga, Takao Saito

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Lipoprotein glomerulopathy (LPG) is characterized by the accumulation of lipoprotein thrombi within glomerular capillaries. This rare disorder is associated with various types of mutations in the apolipoprotein E gene (apoE). Herein, we present a case of LPG with a combination of apoE Chicago (Arg147Pro) and apoE (Glu3Lys) mutations. A 51-year-old Japanese woman presented with severe (3+) proteinuria. The initial renal biopsy showed glomerular capillary dilation and occlusion with lipid granules, a specific characteristic of LPG. Phenotype, genotype, and apoE DNA sequence analyses detected 2 mutations as described above within the same allele. Although both mutations had already been reported in 1 case of LPG each, this is the first time that the combination of the 2 mutations was identified in the same case. Familial analysis detected the same mutations in the patient's mother. However, she has not suffered LPG thus far. In addition, a re-analysis of the previous LPG case with apoE (Glu3Lys) also identified the apoE Chicago mutation, as was observed in our case. Treatment with fenofibrate and irbesartan was initiated, and urinary protein excretion ceased within 1 year; recurrence was not observed after an additional 2 years of follow-up. A second biopsy after 2 years showed great improvement, with lipoprotein thrombi identified only in 2 of 18 glomeruli.

Original languageEnglish
Pages (from-to)112-120
Number of pages9
JournalCase Reports in Nephrology and Dialysis
Volume7
Issue number2
DOIs
Publication statusPublished - 2017 May 2

Keywords

  • Fenofibrate
  • Lipoprotein glomerulopathy
  • Proteinuria
  • Renal biopsy
  • apoE (Glu3Lys)
  • apoE Chicago

ASJC Scopus subject areas

  • Nephrology

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