1
|
Ikuma D, Hiromura K, Kajiyama H, Suwa J, Ikeuchi H, Sakairi T, Kaneko Y, Maeshima A, Kurosawa H, Hirayama Y, Yokota K, Araki Y, Sato K, Asanuma YF, Akiyama Y, Hara M, Nojima Y, Mimura T. The correlation of urinary podocytes and podocalyxin with histological features of lupus nephritis. Lupus 2017; 27:484-493. [PMID: 29050536 DOI: 10.1177/0961203317734918] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Objectives The objective of this study was to test the correlation of urinary podocyte number (U-Pod) and urinary podocalyxin levels (U-PCX) with histology of lupus nephritis. Methods This was an observational, cross-sectional study. Sixty-four patients were enrolled: 40 with lupus nephritis and 24 without lupus nephritis (12 lupus nephritis patients in complete remission and 12 systemic lupus erythematosus patients without lupus nephritis). Urine samples were collected before initiating treatment. U-Pod was determined by counting podocalyxin-positive cells, and U-PCX was measured by sandwich ELISA, normalized to urinary creatinine levels (U-Pod/Cr, U-PCX/Cr). Results Lupus nephritis patients showed significantly higher U-Pod/Cr and U-PCX/Cr compared with patients without lupus nephritis. U-Pod/Cr was high in proliferative lupus nephritis (class III±V/IV±V), especially in pure class IV (4.57 (2.02-16.75)), but low in pure class V (0.30 (0.00-0.71)). U-Pod/Cr showed a positive correlation with activity index ( r=0.50, P=0.0012) and was independently associated with cellular crescent formation. In contrast, U-PCX/Cr was high in both proliferative and membranous lupus nephritis. Receiver operating characteristic analysis revealed significant correlation of U-Pod/Cr with pure class IV, class IV±V and cellular crescent formation, and the combined values of U-Pod/Cr and U-PCX/Cr were shown to be associated with pure class V. Conclusions U-Pod/Cr and U-PCX/Cr correlate with histological features of lupus nephritis.
Collapse
Affiliation(s)
- D Ikuma
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan
| | - K Hiromura
- 2 Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - H Kajiyama
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan
| | - J Suwa
- 2 Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - H Ikeuchi
- 2 Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - T Sakairi
- 2 Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Y Kaneko
- 2 Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - A Maeshima
- 2 Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - H Kurosawa
- 3 Diagnostics Research Department, Denka Innovation Center, Tokyo, Japan
| | - Y Hirayama
- 3 Diagnostics Research Department, Denka Innovation Center, Tokyo, Japan
| | - K Yokota
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan
| | - Y Araki
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan
| | - K Sato
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan
| | - Y F Asanuma
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan
| | - Y Akiyama
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan.,4 Department of Rheumatology, Japanese Red Cross Ogawa Hospital, Saitama, Japan
| | - M Hara
- 5 Department of Pediatrics, Yoshida Hospital, Niigata, Japan
| | - Y Nojima
- 6 Department of Nephrology, Japanese Red Cross Maebashi Hospital, Gunma, Japan
| | - T Mimura
- 1 Department of Rheumatology and Applied Immunology, Saitama Medical University, Saitama, Japan
| |
Collapse
|