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논문 기본 정보

자료유형
학술저널
저자정보
Choi Yun Young (Departments of Pediatrics, Seoul National University Children’s Hospital, Seoul, Republic of Korea) Ahn Yo Han (Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Korea.) Park Eujin (Department of Pediatrics, Korea University Guro Hospital, Seoul, Republic of Korea) Kim Ji Hyun (Departments of Pediatrics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea) 강희경 (서울대학교) Lee Hyun Kyung (Department of Pediatrics, Chung-Ang University Hospital,)
저널정보
대한신장학회 Kidney Research and Clinical Practice Kidney Research and Clinical Practice Vol.43 No.5
발행연도
2024.9
수록면
663 - 670 (8page)
DOI
10.23876/j.krcp.23.258

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Background: Persistent proteinuria is an important indicator of kidney damage and requires active evaluation and intervention. However, tubular proteinuria of genetic origin typically does not improve with immunosuppression or antiproteinuric treatment. Recently, defects in CUBN were found to cause isolated proteinuria (mainly albuminuria) due to defective tubular albumin reuptake. Unlike most other genetically caused persistent albuminuria, CUBN C-terminal variants have a benign course without progression to chronic kidney disease according to the literature. Here, we present Korean cases with persistent proteinuria associated with C-terminal variants of CUBN. Methods: We identified Korean patients with CUBN variants among those with an identified genetic cause of proteinuria and evaluated their clinical features and clinical course. We also reviewed the literature on CUBN-associated isolated proteinuria published to date and compared it with Korean patients. Results: All patients presented with incidentally found, asymptomatic isolated proteinuria at a median age of 5 years. The proteinuria was in the subnephrotic range and did not significantly change over time, regardless of renin- angiotensin system inhibition. Initial physical examination, laboratory findings, and kidney biopsy results, when available, were unremarkable other than significant proteinuria. All patients maintained kidney function throughout the follow-up duration. All patients had at least one splicing mutation, and most of the variants were located C-terminal side of the gene. Conclusion: We report Korean experience of CUBN-related benign proteinuria, that aligns with previous reports, indicating that this condition should be considered in cases with incidentally found asymptomatic isolated proteinuria, especially in young children.

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