Abstract
Background
Several recent studies have shown improved short-term outcome of steroid-resistant nephrotic syndrome (SRNS) in children; however, only a few studies have evaluated the long-term outcome. The aims of our study were to obtain detailed data and analyze the long-term outcome of children with SRNS.
Methods
Sixty-nine children with idiopathic SRNS were enrolled and divided into two groups based on initial histopathological patterns: focal segmental glomerulosclerosis (FSGS) and minimal change (MC)/diffuse mesangial proliferation (DMP). The effects of initial treatment with the immunosuppressant of choice (cyclosporine or cyclophosphamide) on renal survival, remission, and incidence of complications were analyzed in both groups (4 subgroups).
Results
The renal survival rate was significantly different among the four different subgroups based on different combinations of initial histopathological pattern (FSGS vs. MC/DMP) and initial immunosuppressant used for treating SRNS (cyclosporine vs. cyclophosphamide) (P = 0.013), with renal survival in the FSGS (cyclophosphamide) subgroup being especially low (54.6 %). Disease- and/or treatment-associated complications were relatively low; however, hypertension at last examination was observed in a considerable number of patients (31.9 %).
Conclusions
Our results suggest that a recently developed therapeutic regimen with cyclosporine considerably improves both the initial remission rate and the long-term renal survival rate of children with idiopathic SRNS.
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Acknowledgments
The results presented in this paper have not been published previously in whole or part. The authors would like to thank Drs. Kentaro Ogata (Tokyo), Ryugo Hiramoto (Chiba), Takeshi Matsuyama (Tokyo), Hitoshi Wakaki (Tokyo), and Kaori Kikunaga (Tokyo) for their contributions to this study.
Financial declaration
Kenji Ishikura has received lecture fees from Novartis Pharma and Asahi Kasei Pharma. Yuko Hamasaki has received research grants from Novartis Pharma and lecture fees from Novartis Pharma, Astellas Pharma, and Pfizer Japan. Hiroshi Hataya has received lecture fees from Asahi Kasei Pharma, Astellas Pharma, Baxter, JMS, and Meiji Seika Pharma Co. Ltd. Masataka Honda has received lecture fees from Novartis Pharma, Takeda Pharmaceutical Co. Ltd., Chugai Pharmaceutical Co. Ltd., Japan Blood Products Organization, JCR Pharmaceuticals Co. Ltd., and Asahi Kasei Pharma. Masaaki Mori has received lecture fees from Astellas Pharma, Pfizer Japan, Asahi Kasei Pharma, Meiji Seika Pharma Co. Ltd., and Chugai Pharmaceutical Co. Ltd.
Ethical approval
The study was conducted in accordance with the ethical principles set out in the Declaration of Hesinki, and with the ethical guideline for epidemiological studies issued by the Minstry of Health, Labor and Welfare in Japan. The study was approved by the ethics committee of Tokyo Metropolitan Children's medical Center (H25-2).
Informed Consent
Because data were reported retrospectively based on patient charts, informed consent was not obtained, in accordance with the above guidelines.
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Supplementary figure
The detailed clinical course of 9 patients who reached ESKD. Figure shows detailed clinical course of 9 patients who reached ESKD from the date when they were diagnosed as SRNS to the date when they reached ESKD. Cases 3 and 5 showed diffuse mesangial proliferation in the initial renal biopsy, and the other 7 cases showed focal segmental glomerulosclerosis. Alb Serum albumin (g/dl), Cr serum creatinine (mg/dl) (GIF 262 kb)
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Inaba, A., Hamasaki, Y., Ishikura, K. et al. Long-term outcome of idiopathic steroid-resistant nephrotic syndrome in children. Pediatr Nephrol 31, 425–434 (2016). https://doi.org/10.1007/s00467-015-3174-7
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DOI: https://doi.org/10.1007/s00467-015-3174-7