Cited by 77Renal Diseases and GlomerulopathiesChronic Kidney Disease and DiabetesLipoproteins and Cardiovascular Health

Apolipoprotein E–related glomerular disorders

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Saito, Takao, Matsunaga, Akira, Fukunaga, Megumu, Nagahama, Kiyotaka, Hara, Shigeo, Muso, Eri·2020·Kidney International

Abstract

Of the glomerular disorders that occur due to apolipoprotein E (apoE) mutations, apoE2 homozygote glomerulopathy and lipoprotein glomerulopathy (LPG) have been characterized. ApoE2 homozygote glomerulopathy has been found in individuals expressing homozygous apoE2/2. This was characterized histologically by glomerulosclerosis with marked infiltration of foam cells derived from macrophages, and occasionally with non-lamellated lipoprotein thrombi. Recently, several cases of apoE Toyonaka (Ser197Cys) combined with homozygous apoE2/2 have been reported, in which non-immune membranous nephropathy-like features were observed in glomeruli. Interestingly, in these cases, apoE accumulation was identified by tandem mass spectrometry. Therefore, it is speculated that these findings may arise from apoE molecules without lipids, which result from hinge damage by apoE Toyonaka and may cross the glomerular basement membrane as small molecules. LPG is primarily associated with heterozygous apoE mutations surrounding the low-density lipoprotein-receptor binding site, and it is histologically characterized by lamellated lipoprotein thrombi that lack foam cells. Recent studies have suggested that LPG can be induced by thermodynamic destabilization, hydrophobic surface exposure, and the aggregation of apoE resulting from the incompatibility of apoE mutated residues within helical regions. Additionally, apoE5 may play a supporting role in the development of LPG and in lipid-induced kidney diseases via hyperlipoproteinemia. Thus, it is interesting that many apoE mutations contribute to characteristic glomerular disorders through various mechanisms. In particular, macrophages may uptake lipoproteins into the cytoplasm and contribute to the development of apoE2 homozygote glomerulopathy as foam cells, and their dysfunction may contribute to the accumulation of lipoproteins in the glomerulus, causing lipoprotein thrombi in LPG.

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Crossref · 10.1016/j.kint.2019.10.031

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Authors
Saito, T., Matsunaga, A., Fukunaga, M., Nagahama, K., Hara, S., & Muso, E.
Affiliations
  • Fukuoka University (JP)
  • Okinawa Miyako Hospital (JP)
  • Kyorin University (JP)
  • Kobe City Medical Center General Hospital (JP)
  • Kyoto Kacho University (JP)
Corresponding author
Saito, Takao
Venue
Kidney International
Publisher
Elsevier BV
Published
2020-02
Volume
97
Issue
2
Pages
279-288
ISSN
0085-2538 (ISSN-L)
OpenAlex
W2990680675
Cited by
77
References
109
Citations by year
2026: 10 · 2025: 14 · 2024: 13 · 2023: 13 · 2022: 13 · 2021: 11 · 2020: 3
FWCI
1.06
Type
journal article
Language
en
Open access
Locations
  • Kidney International (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Ministry of Education, Science, Technology, Sport and Culture (10670982, 14571043, 16590806, 18590917, 21591049)
  • Ministry of Health, Labour and Welfare
Topics
  • Health Sciences › Medicine › Nephrology › Renal Diseases and Glomerulopathies
  • Health Sciences › Medicine › Nephrology › Chronic Kidney Disease and Diabetes
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
Keywords
apolipoprotein E, lipoprotein glomerulopathy, glomerulosclerosis, foam cells, macrophages, membranous nephropathy, hyperlipoproteinemia, glomerular basement membrane
MeSH terms
Apolipoproteins E, Homozygote, Humans, Kidney Diseases, Kidney Glomerulus, Apolipoprotein E2

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