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      Plasmapheresis Is Associated With Better Renal Outcomes in Lupus Nephritis Patients With Thrombotic Microangiopathy : A Case Series Study

      research-article
      , MD, , MD, , MD, , MD, PhD
      Medicine
      Wolters Kluwer Health

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          Abstract

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          Abstract

          The aim of this study was to evaluate the efficacy of plasmapheresis in patients with lupus nephritis-combined thrombotic microangiopathy (TMA) in a Chinese cohort.

          Clinical and therapeutic data of patients with lupus nephritis–combined TMA were collected retrospectively. A comparison between those with and without plasmapheresis was performed.

          Seventy patients with renal biopsy-proven TMA in lupus nephritis were treated with conventional combined corticosteroid and immunosuppressive agents as induction therapy, 9 of the 70 patients received additional plasmapheresis. The plasmapheresis group presented with more severe SLE and renal activity indices, including a significant higher ratio of neurologic disorder ( P = 0.025), lower level of platelet count ( P = 0.009), higher value of serum creatinine ( P = 0.038), higher percentage of anti-cardiolipin antibodies positive ( P = 0.001), and higher Systemic Lupus Erythematosus Disease Activity Index scores ( P = 0.012), than that of the nonplasmapheresis group. However, the plasmapheresis group had a significant higher rate of remission and a lower ratio of treatment failure than that of the nonplasmapheresis group ( P = 0.03). As the baseline data were significantly different between the 2 groups, the propensity score match was further designed to avoid retrospective bias. After re-analysis, the plasmapheresis group still had a significant higher rate of remission and a lower ratio of treatment failure than that of the nonplasmapheresis group ( P = 0.018). More importantly, the plasmapheresis group had significant less composite endpoints than that of the nonplasmapheresis group ( P = 0.005).

          Our study suggested that additional plasmapheresis on conventional induction therapy may benefit patients with lupus nephritis-combined TMA, which warrants further explorations.

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          Most cited references39

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          Thrombotic microangiopathies.

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            Diffuse proliferative lupus nephritis: identification of specific pathologic features affecting renal outcome.

            Prerandomization renal biopsy specimens were examined in 102 patients upon entry into prospective therapeutic trials of lupus nephritis in an attempt to identify early predictors of renal failure outcome. All 11 renal failures occurred among the 72 individuals with diffuse proliferative or membranoproliferative glomerulonephritis (DPGN/MPGN); thus, these patients were at modestly, but significantly, increased risk of endstage renal disease compared to those with focal proliferative, membranous, or mesangial glomerulonephritis. Considering the low incidence of endstage renal disease among patients with DPGN/MPGN, we sought to refine the prognostic information obtained from renal morphology by semiquantitative scoring of individual histologic features and by derivation of composite histologic scores specified by Activity (AI) and Chronicity (CI) Indices. Among the 72 patients with DPGN/MPGN, the composite AI was more strongly predictive of renal failure than were the individual active histologic features; cellular crescents and extensive fibrinoid necrosis yielded positive associations, while endocapillary proliferation, leucocytic exudation, and hyaline thrombi in glomeruli and interstitial inflammation by themselves did not emerge as useful prognostic indicators. However, chronicity items (glomerular sclerosis, fibrous crescents, tubular atrophy, and interstitial fibrosis) considered individually, as well as in the composite CI, were highly predictive of renal failure outcome. Particularly striking was the prognostic value of tubular atrophy; all 11 renal failures were among the 43 patients with tubular atrophy on prerandomization renal biopsy. While no single pathologic variable improved outcome predictions among those with tubular atrophy, examination for interactions among variables revealed that glomerular sclerosis and cellular crescents had a synergistic effect which augmented the prognostic information derived from analysis of tubular atrophy alone.(ABSTRACT TRUNCATED AT 250 WORDS)
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              Predicting renal outcomes in severe lupus nephritis: contributions of clinical and histologic data.

              Despite several years of intense investigation, there continues to be controversy about the value of clinical, demographic and histologic features in prediction of outcomes of lupus nephritis. In addition, contemporary treatments have reduced the risk of progressive renal injury and thus may have altered the prognostic significance of some of these factors. We have therefore re-examined the predictive value of variables previously associated with an increased risk of renal insufficiency by studying 65 patients with severe lupus nephritis treated with intensive regimens of intravenous pulse cyclophosphamide or methylprednisolone. Five clinical features at study entry were each associated with an increased probability of doubling the serum creatinine: age greater than 30 years, Black race, hematocrit less than 26%, serum creatinine greater than 2.4 mg/dl, and C3 complement less than 76 mg/dl. By multivariate survival analysis, serum creatinine, hematocrit and race emerged as the strongest set of independent clinical predictors; the other clinical and demographic factors, including age and C3 complement did not contribute significantly to outcome predictions in the context of these three variables. Renal biopsy evaluation offered additional prognostic information and showed that patients with severe active and chronic histologic changes were at increased risk for developing renal insufficiency. The combination of cellular crescents and interstitial fibrosis was particularly ominous. Outcome predictions based on the strongest clinical model (serum creatinine, hematocrit and race) were significantly enhanced by the addition of renal pathology data. Consideration of these prognostic factors may contribute to decisions regarding the type and intensity of immunosuppressive therapy for patients with lupus nephritis.
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                Author and article information

                Journal
                Medicine (Baltimore)
                Medicine (Baltimore)
                MEDI
                Medicine
                Wolters Kluwer Health
                0025-7974
                1536-5964
                May 2016
                06 May 2016
                : 95
                : 18
                : e3595
                Affiliations
                From the Department of Medicine, Renal Division, Peking University First Hospital; Institute of Nephrology, Peking University; Key laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China (Q-YL, FY, F-DZ, M-HZ); Department of Nephrology, Peking University International Hospital (FY); and Peking-Tsinghua Center for Life Sciences, Beijing, PR China (M-HZ).
                Author notes
                Correspondence: Feng Yu, Department of Medicine, Renal Division, Peking University First Hospital; Institute of Nephrology, Peking University; Key laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China; Department of Nephrology, Peking University International Hospital, Beijing 100034, PR China (e-mail: yufengevert1@ 123456sina.com ).
                Article
                03595
                10.1097/MD.0000000000003595
                4863807
                27149490
                74f9b9ca-ce2a-4c18-902d-4bedcd41b540
                Copyright © 2016 Wolters Kluwer Health, Inc. All rights reserved.

                This is an open access article distributed under the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0

                History
                : 13 November 2015
                : 26 March 2016
                : 12 April 2016
                Categories
                5200
                Research Article
                Observational Study
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