BACKGROUND AND OBJECTIVES: An early histopathologic predictor of the renal prognosis, before the occurrence of advanced glomerular sclerosis/interstitial fibrosis and/or apparent renal dysfunction, remains to be established in IgA nephropathy (IgAN). This study aimed to determine whether the glomerular density (GD; nonsclerotic glomerular number per renal cortical area) of biopsy specimens obtained at an early stage of IgAN could predict the long-term renal outcome. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: The predictive value of the factors at biopsy, including the GD, on the renal outcome was retrospectively analyzed for 98 patients who had IgAN with an estimated GFR of > or =60 ml/min per 1.73 m(2) at biopsy (87 ml/min per 1.73 m(2) on average). RESULTS: The individual value of GD in biopsy ranged from 1.2 to 8.1/mm(2) (i.e., approximately a seven-fold variation), and the GD showed a close inverse correlation with mean glomerular volume. Among the various clinicopathologic factors involved, both a cellular/fibrocellular crescent and the GD were found to be significant predictors of progression in multivariate analyses. A low GD in the biopsy specimens was frequently associated with a steeper slope of the renal function and a synergistically enhanced risk for progression with the presence of cellular/fibrocellular crescent. The renal function, proteinuria, degrees of glomerulosclerosis, and interstitial fibrosis at biopsy were not independent predictors of the prognosis in these patients. CONCLUSIONS: A strong predictive relationship of low GD with progression observed in this study suggests that GD may serve as an early histopathologic marker of long-term renal prognosis in IgAN.
BACKGROUND AND OBJECTIVES: An early histopathologic predictor of the renal prognosis, before the occurrence of advanced glomerular sclerosis/interstitial fibrosis and/or apparent renal dysfunction, remains to be established in IgA nephropathy (IgAN). This study aimed to determine whether the glomerular density (GD; nonsclerotic glomerular number per renal cortical area) of biopsy specimens obtained at an early stage of IgAN could predict the long-term renal outcome. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: The predictive value of the factors at biopsy, including the GD, on the renal outcome was retrospectively analyzed for 98 patients who had IgAN with an estimated GFR of > or =60 ml/min per 1.73 m(2) at biopsy (87 ml/min per 1.73 m(2) on average). RESULTS: The individual value of GD in biopsy ranged from 1.2 to 8.1/mm(2) (i.e., approximately a seven-fold variation), and the GD showed a close inverse correlation with mean glomerular volume. Among the various clinicopathologic factors involved, both a cellular/fibrocellular crescent and the GD were found to be significant predictors of progression in multivariate analyses. A low GD in the biopsy specimens was frequently associated with a steeper slope of the renal function and a synergistically enhanced risk for progression with the presence of cellular/fibrocellular crescent. The renal function, proteinuria, degrees of glomerulosclerosis, and interstitial fibrosis at biopsy were not independent predictors of the prognosis in these patients. CONCLUSIONS: A strong predictive relationship of low GD with progression observed in this study suggests that GD may serve as an early histopathologic marker of long-term renal prognosis in IgAN.
Authors: Hyun Soon Lee; Myung Suk Lee; Sa Min Lee; Sang Yun Lee; Eun Sun Lee; Eun Young Lee; So Yeon Park; Jin Suk Han; Sungkwon Kim; Jung Sang Lee Journal: Nephrol Dial Transplant Date: 2004-12-23 Impact factor: 5.992
Authors: Hisham E Elsherbiny; Mariam P Alexander; Walter K Kremers; Walter D Park; Emilio D Poggio; Mikel Prieto; John C Lieske; Andrew D Rule Journal: Clin J Am Soc Nephrol Date: 2014-10-15 Impact factor: 8.237
Authors: Aleksandar Denic; Hisham Elsherbiny; Aidan F Mullan; Bradley C Leibovich; R Houston Thompson; Luisa Ricaurte Archila; Ramya Narasimhan; Walter K Kremers; Mariam P Alexander; John C Lieske; Lilach O Lerman; Andrew D Rule Journal: J Am Soc Nephrol Date: 2020-09-16 Impact factor: 10.121