ArticleCase reports in nephrology and dialysis
Membranous Nephropathy-Like Apolipoprotein E Deposition Disease with Apolipoprotein E Toyonaka and Homozygous Apolipoprotein E2/2 without Dyslipidemia, with Characteristic Electron-Dense Deposits.
Article in Case reports in nephrology and dialysis. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed, 2 citations in OpenAlex.
- Impact of Apolipoprotein E Variants: A Review of Naturally Occurring Variants and Clinical Features.Journal of atherosclerosis and thrombosis · 2025Review
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Authors and funding
11 authors at 6 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Recently, several cases of novel apolipoprotein E (apoE)-related glomerular disease known as membranous nephropathy (MN)-like apoE deposition disease with apoE Toyonaka (Ser197Cys) and homozygous apoE2/2 have been reported. However, the clinical and pathological characteristics are uncertain due to the small number of reports. Here, we report an additional case with various clinical and pathological characteristics. A 28-year-old Japanese man with mild proteinuria and hematuria underwent a kidney biopsy. Examination under a light microscope revealed mesangial proliferation, mesangial matrix expansion, and segmental spike lesion. An immunofluorescence study showed no immunoglobulin or complement depositions. In the electron microscopic (EM) examination, massive deposits with various electron densities in the subepithelial, subendothelial, and paramesangial areas were more prominent than those reported in previous cases, which resembled microbubbles or microcysts on higher magnification. The glomerular basement membrane (GBM) structure was partly degenerated by these deposits. Serum triglyceride and cholesterol levels were within the normal range. However, the serum apoE concentration was significantly high, and glomerular apoE accumulation was detected in immunohistochemistry. The DNA sequence revealed apoE Toyonaka and homozygous apoE2/2 similar to that of the previous cases with MN-like apoE deposition disease. MN-like apoE deposition disease can manifest as only mild hematuria and proteinuria without dyslipidemia. Various characteristic deposits associated with GBM degeneration can be observed in the EM study.
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