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Glomerular epithelial CD44 expression and segmental sclerosis in IgA nephropathy

Authors
 Sewha Kim  ;  Yon Hee Kim  ;  Kyu Hun Choi  ;  Hyeon Joo Jeong 
Citation
 CLINICAL AND EXPERIMENTAL NEPHROLOGY, Vol.20(6) : 871-877, 2016 
Journal Title
 CLINICAL AND EXPERIMENTAL NEPHROLOGY 
ISSN
 1342-1751 
Issue Date
2016
Abstract
BACKGROUND: CD44 is a marker of activated parietal epithelial cells (PECs), and is expressed in glomerular visceral epithelial cells (VECs) during development of segmental sclerosis. We explored the significance of glomerular epithelial CD44 expression in relation to segmental sclerosis in patients with mild IgA nephropathy (IgAN). METHODS: A total of 126 cases of IgAN were divided into three groups based on glomerular morphology: normal (group A, n = 30), mild mesangial proliferation without segmental sclerosis or synechia (SS) (group B, n = 31), or mild mesangial proliferation with SS (group C, n = 65). The number of CD44-expressing PECs and VECs was counted in each glomerulus and expressed as the mean number per case. RESULTS: CD44 staining was positive in VECs in 59.5 %, in PECs in 79.4 % and in both cell types in 56.3 % of cases. The number of CD44+ PECs or VECs was significantly higher in group C than in groups A or B. Cases with >1 CD44+ cell (PECs and VECs) per glomerulus were associated with increased urine protein/creatinine ratio (UPCr) at last follow-up. The presence of >1 CD44+ VEC/glomerulus was associated with increased UPCr and serum creatinine levels, and decreased estimated glomerular filtration rate (eGFR) even in the absence of SS at the time of biopsy. CONCLUSION: CD44 was expressed in PECs and VECs in association with SS in IgAN. Increased CD44 expression in VECs is a sign of active glomerular injury and dysfunction in these patients.
Full Text
https://link.springer.com/article/10.1007%2Fs10157-015-1222-z
DOI
10.1007/s10157-015-1222-z
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Jeong, Hyeon Joo(정현주) ORCID logo https://orcid.org/0000-0002-9695-1227
Choi, Kyu Hun(최규헌) ORCID logo https://orcid.org/0000-0003-0095-9011
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/152742
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