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Apolipoprotein E-associated Lipoprotein Glomerulo-tubulopathy
Hikaru Tanimizu1, Risa Hara1, Akinari Sekine1
1Nephrology Center and Okinaka Memorial Institute for Medical Research, Toranomon Hospital Toranomon, Japan.
Abstract:
A 32-year-old man was admitted for the evaluation of proteinuria (5.69 g/day). A light microscopic examination showed markedly dilated glomerular capillary loops with vacuolated areas in many glomeruli, and vacuolated areas were seen on peritubular capillaries in the tubulointerstitium. When electron microscopy specimens prepared by pre-fixation with glutaraldehyde and post-fixation with osmium tetroxide were used for oil red staining, the deposition was confirmed on the affected areas. A genetic analysis of apoE showed that the lipoprotein glomerulopathy was due to apoE-Sendai (Arg145Pro, p.R163P) heterozygosity, which was found in not only the patient but also his mother and twin brother.
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