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Podocyte foot process width is a prediction marker for complete renal response at 6 and 12 months after induction
Kunihiro Ichinose1, Mineaki Kitamura2, Shuntaro Sato3
1Department of Immunology and Rheumatology, Unit of Advanced Preventive Medical Sciences, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
Abstract:
Morphological change that includes diffuse effacement of podocyte foot processes is correlated with proteinuria in patients with lupus nephritis (LN). We collected the data of clinico-pathological parameters and assessed foot process width (FPW) as an index of podocyte effacement in 73 patients with LN who had undergone renal biopsy. The multivariate analysis revealed that female gender (OR: 5.288; 95%CI: 1.197-37.29; p = .0267) and FPW (OR = 0.999, 95%CI = 0.997-0.999, p = .0150) were significantly predictive of a complete renal response (CR) at 6 months, while lymphocyte counts (OR = 1.002; 95%CI = 1.001-1.003, p = .0028) and FPW (OR = 0.998, 95%CI = 0.996-0.999, p = .0027) were significantly predictive of CR at 12 months. The cut-off point determined by the Classification and Regression Trees algorithm showed that FPW <908.3 nm provides the best performance for predicting patients who achieve CR at 12 months. A smaller FPW appears to be a predictive factor for CR at 6 and 12 months after induction therapy.
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