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https://www.readbyqxmd.com/read/28490696/-diagnostic-value-of-renal-phospholipase-a2-receptor-and-serum-anti-phospholipase-a2-receptor-antibody-in-membranous-nephropathy
#1
Xiaoxiang Wu, Si Wen, Xuejing Zhu, Shuguang Yuan, Xiangqing Xu, Danyi Yang, Lin Sun, Hong Liu, Fuyou Liu
To examine the expression of phospholipase A2 receptor (PLA2R) in renal tissues and the level of anti-PLA2R antibody in serum in patients with idiopathic membranous nephropathy (IMN) and secondary membranous nephropathy (SMN), and to evaluate their diagnostic value in IMN.
 Methods: A total of 73 patients, who were diagnosed between May, 2014 and February, 2015 in the Department of Nephrology of the Second Xiangya Hospital, Central South University, were divided into three groups: an IMN group (n=48), an SMN group (n=17) and a minimal change disease group (n=8) according to the renal biopsy...
April 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28488220/pla2r-positive-primary-membranous-nephropathy-in-a-child-with-ipex-syndrome
#2
Teresa Chuva, Frederick Pfister, Ortraud Beringer, Kerstin Felgentreff, Maike Büttner-Herold, Kerstin Amann
BACKGROUND: Immunodysregulation, polyendocrinopathy, enteropathy, X-linked (IPEX) syndrome is a rare primary immunodeficiency syndrome characterized by the development of multiple autoimmune disorders in affected individuals. Different forms of renal injury have been reported in IPEX syndrome, and membranous nephropathy (MN) is among the most common glomerulopathies found. However, the exact pathogenesis of MN in this setting has not been elucidated, and it is not clear whether it is part of the clinical spectrum of the disease or secondary to medications, infections or other concomitant insults...
May 9, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28413416/immunohistochemical-glomerular-expression-of-phospholipase-a2-receptor-in-primary-and-secondary-membranous-nephropathy-a-retrospective-study-in-an-indian-cohort-with-clinicopathological-correlations
#3
Sanjeet Roy, Anila Korula, Gopal Basu, Shibu Jacob, Santosh Varughese, Veeraswamy Tamilarasi
BACKGROUND: Limited published literature exists on the utility and standardization of anti-phospholipase A2 receptor (anti-PLA2R) immunohistochemistry (IHC) for the diagnosis of primary membranous nephropathy (MN). The study aimed to validate anti-PLA2R IHC for the diagnosis of primary MN and clinicopathological correlations in an Indian cohort. METHODS: Subjects included patients with primary and secondary MN diagnosed between January 2012 and August 2014 with an adequate renal biopsy and at least 1 year of clinical follow-up...
January 2017: Nephron Extra
https://www.readbyqxmd.com/read/28397878/a-novel-time-resolved-fluoroimmunoassay-for-the-quantitative-detection-of-antibodies-against-the-phospholipase-a2-receptor
#4
Biao Huang, Liang Wang, Yi Zhang, Jue Zhang, Qiuhua Zhang, Hualong Xiao, Bin Zhou, Zhuxing Sun, Ya-Nan Cao, Yu Chen, Zhigang Hu, Huiming Sheng
A highly sensitive time-resolved fluoroimmunoassay (TRFIA) was developed to quantify serum antibodies against the phospholipase A2 receptor (anti-PLA2R-IgG) for differential diagnosis of membranous nephropathy. Recombinant PLA2R (rPLA2R) was coated onto 96-well plates as a capture. A goat-anti-human IgG tracer was prepared with europium-chelate for detection. After bound/free separation by washing, the fluorescence counts of bound tracer were measured for quantifying serum anti-PLA2R-IgG concentration. A purified anti-PLA2R-IgG calibrator was first prepared for ensuring that consistent quantitative results could be obtained...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28397717/renal-phospholipase-a2-receptor-and-the-clinical-features-of-idiopathic-membranous-nephropathy
#5
Ning-Xin Xu, Qiong-Hong Xie, Zhu-Xing Sun, Jia Wang, Yan Li, Liang Wang, Shao-Jun Liu, Jun Xue, Chuan-Ming Hao
BACKGROUND: According to the renal phospholipase A2 receptor (PLA2R) immunohistochemistry, idiopathic membranous nephropathy (iMN) could be categorized into PLA2R-associated and non-PLA2R-associated iMN. This study aimed to examine whether the non-PLA2R-associated iMN had any difference in clinical features compared with PLA2R-associated iMN. METHODS: A total of 231 adult patients diagnosed as iMN were recruited to this retrospective study. Renal PLA2R expression was examined by immunofluorescence...
April 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28396737/anti-phospholipase-a2-receptor-antibody-levels-at-diagnosis-predicts-spontaneous-remission-of-idiopathic-membranous-nephropathy
#6
Perrine Jullien, Barbara Seitz Polski, Nicolas Maillard, Damien Thibaudin, Blandine Laurent, Edouard Ollier, Eric Alamartine, Gérard Lambeau, Christophe Mariat
Background: The diagnostic role of circulating anti-phospholipase A2 receptor antibodies (anti-PLA2R Abs) is now well recognized in idiopathic membranous nephropathy (iMN). These Abs could also be interesting as predictors of clinical outcome. In this study, we explored the prognostic value of anti-PLA2R Abs measured in a cohort of iMN patients, with a special focus on their ability to detect patients achieving spontaneous remission. Methods: All adult patients with biopsy-proven iMN diagnosed between 1978 and 2007 were retrospectively screened in our centre...
April 2017: Clinical Kidney Journal
https://www.readbyqxmd.com/read/28362702/the-usefulness-of-phospholipase-a2-receptor-and-igg4-detection-in-differentiation-primary-membranous-nephropathy-from-secondary-membranous-nephropathy-in-renal-biopsy
#7
Min-Kyung Yeo, Yoo Hyung Kim, Dae Eun Choi, Song-Yi Choi, Kyung-Hee Kim, Kwang-Sun Suh
Membranous nephropathy (MGN) is the most common cause of the nephrotic syndrome in adults. Most cases of MGN are primary, but secondary MGN are frequently encountered. Determination of secondary MGN is crucial for initiation of appropriate treatment. The diagnostic performance of the phospholipase A2 receptor (PLA2R) and immunoglobulin G4 (IgG4) detection based on immunohistochemistry were evaluated using biopsy tissues of 59 primary and 56 secondary MGN cases for discrimination between primary MGN and secondary MGN...
March 30, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28340077/idiopathic-non-lupus-full-house-nephropathy-is-associated-with-poor-renal-outcome
#8
Emilie C Rijnink, Y K Onno Teng, Tineke Kraaij, Ron Wolterbeek, Jan A Bruijn, Ingeborg M Bajema
Background.: Full-house immunofluorescence in combination with various histopathologic lesions in the renal biopsies of patients without overt systemic lupus erythematosus (SLE) poses a diagnostic challenge. In this setting, the biopsy findings are sometimes termed non-lupus 'full-house nephropathy' (FHN). It is presently unknown whether idiopathic non-lupus FHN is clinicopathologically and prognostically distinct from lupus FHN. Methods.: We included non-lupus FHN patients and lupus FHN controls (four or more American College of Rheumatology or Systemic Lupus International Collaborating Clinics criteria) who were biopsied between 1968 and 2014 at the Leiden University Medical Centre...
April 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28257452/prognostic-value-of-pla2r-autoimmunity-detected-by-measurement-of-anti-pla2r-antibodies-combined-with-detection-of-pla2r-antigen-in-membranous-nephropathy-a-single-centre-study-over-14-years
#9
Franck Pourcine, Karine Dahan, Fabrice Mihout, Marine Cachanado, Isabelle Brocheriou, Hanna Debiec, Pierre Ronco
INTRODUCTION: Clinical course of membranous nephropathy (MN) is difficult to predict. Measurement of circulating anti-PLA2R autoantibodies (PLA2R-Ab) and detection in immune deposits of PLA2R antigen (PLA2R-Ag) are major advances in disease understanding. We evaluated the clinical significance of these biomarkers. METHODS: In this 14-year retrospective study, we collected data from 108 MN patients and assessed the relationship between clinical course, PLA2R-Ab and PLA2R-Ag...
2017: PloS One
https://www.readbyqxmd.com/read/28167276/detection-and-monitoring-pla2r-autoantibodies-by-lips-in-membranous-nephropathy
#10
Peter D Burbelo, Laurence H Beck, Meryl Waldman
Autoantibodies against the M-type phospholipase A2 receptor (PLA2R) are specific markers for primary membranous nephropathy (MN). Quantification of PLA2R autoantibodies is an important, noninvasive tool that facilitates the diagnosis and monitoring of primary MN. In this report we describe a highly quantitative luciferase immunoprecipitation systems (LIPS) assay for detecting PLA2R autoantibodies. For these studies, a cDNA fragment encoding the first 858 amino acids of PLA2R protein was cloned to generate N-terminal antigen fusion constructs with Gaussia luciferase (Gluc) and Nano luciferase (NanoLuc) reporters...
May 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28065518/membranous-nephropathy-integrating-basic-science-into-improved-clinical-management
#11
REVIEW
Daniel C Cattran, Paul E Brenchley
Idiopathic membranous nephropathy (INM) remains a common cause of the nephrotic syndrome in adults. The autoimmune nature of IMN was clearly delineated in 2009 with the identification of the glomerular-deposited IgG to be a podocyte receptor, phospholipase A2 receptor (PLA2R) in 70% to 75% of cases. This anti-PLA2R autoantibody, predominantly the IgG4 subclass, has been quantitated in serum using an enzyme-linked immunosorbent assay and has been used to aid diagnosis and monitor response to immunosuppressive therapy...
March 2017: Kidney International
https://www.readbyqxmd.com/read/28028136/hla-drb1-15-01-and-hla-drb3-02-02-in-pla2r-related-membranous-nephropathy
#12
Wei-Bo Le, Jing-Song Shi, Tao Zhang, Lei Liu, Hua-Zhang Qin, ShaoShan Liang, Yuan-Wei Zhang, Cun-Xia Zheng, Song Jiang, Wei-Song Qin, Hai-Tao Zhang, Zhi-Hong Liu
Idiopathic membranous nephropathy (MN) is associated with HLA; however, the HLA allele involved remains unknown. To identify the HLA risk alleles associated with phospholipase A2 receptor (PLA2R)-related MN in the Chinese population, we sequenced the entire MHC region in DNA samples from 99 patients with PLA2R-related MN, 50 patients with PLA2R-unrelated MN, and 100 healthy subjects. Two HLA risk alleles, HLA-DRB1*15:01 and HLA-DRB3*02:02, independently and strongly associated with an increased risk of PLA2R-related MN...
May 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/27942609/membranous-nephropathy-pilot-study-of-a-novel-regimen-combining-cyclosporine-and-rituximab
#13
Meryl Waldman, Laurence H Beck, Michelle Braun, Kenneth Wilkins, James E Balow, Howard A Austin
INTRODUCTION: There is broad consensus that high grade basal proteinuria and failure to achieve remission of proteinuria are key determinants of adverse renal prognosis in patients with primary membranous nephropathy. Based on the fact that current regimens are not ideal due to short and long-term toxicity and propensity to relapse after treatment withdrawal, we developed a treatment protocol based on a novel combination of rituximab and cyclosporine which targets both the B and T cell limbs of the immune system...
July 2016: KI Reports
https://www.readbyqxmd.com/read/27934873/high-density-association-mapping-and-interaction-analysis-of-pla2r1-and-hla-regions-with-idiopathic-membranous-nephropathy-in-japanese
#14
Myo Thiri, Kenjiro Honda, Koichi Kashiwase, Akihiko Mabuchi, Hodaka Suzuki, Kimio Watanabe, Masaaki Nakayama, Tsuyoshi Watanabe, Kent Doi, Katsushi Tokunaga, Eisei Noiri
Although recent studies showed anti-PLA2R antibody plays a crucial role in idiopathic membranous nephropathy (IMN), detailed HLA mapping and interaction between the HLA genes and PLA2R1 have not been investigated in IMN. We genotyped across the PLA2R1 gene and the HLA region, using 183 IMN patients and 811 healthy controls. Five SNPs around the PLA2R1 gene were significantly associated with IMN. In addition to the two SNPs previously reported to be strongly associated with IMN, rs3749119 and rs35771982 (OR 3...
December 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27921164/m-type-phospholipase-a2-receptor-pla2r-glomerular-staining-in-pediatric-idiopathic-membranous-nephropathy
#15
Shoichiro Kanda, Shigeru Horita, Takeshi Yanagihara, Akira Shimizu, Motoshi Hattori
BACKGROUND: Identifying M-type phospholipase A2 receptor (PLA2R) is a landmark breakthrough for understanding adult idiopathic membranous nephropathy (iMN). However, potential roles for PLA2R in pediatric iMN have not been well investigated. METHODS: A total of 34 pediatric iMN patients who underwent kidney biopsy between 1972 and 2015 were enrolled in this study. The study cohort consisted of 15 children aged from 3 to 9 years and 19 aged from 10 to 15 years...
April 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27890680/the-putative-role-of-maldi-msi-in-the-study-of-membranous-nephropathy
#16
Andrew Smith, Vincenzo L'Imperio, Elena Ajello, Franco Ferrario, Niccolò Mosele, Martina Stella, Manuel Galli, Clizia Chinello, Federico Pieruzzi, Goce Spasovski, Fabio Pagni, Fulvio Magni
Membranous Nephropathy (MN) is an immunocomplex mediated renal disease that represents one of the most frequent glomerulopathies worldwide. This glomerular disease can manifest as primary (idiopathic) or secondary and this distinction is crucial when choosing the most appropriate course of treatment. In secondary cases, the best strategy involves treating the underlying disease, whereas in primary forms, the identification of confirmatory markers of the idiopathic etiology underlining the process is requested by clinicians...
November 24, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27876629/improvement-of-idiopathic-membranous-nephropathy-diagnosis-with-ultrasensitive-quantitative-detection-of-anti-phospholipase-a2-receptor
#17
Biao Huang, Liang Wang, Ya-Nan Cao, Yi Zhang, Jue Zhang, Hualong Xiao, Qiuhua Zhang, Weidong Wang, Zhuxing Sun, Yu Chen, Huiming Sheng, Zhigang Hu
No abstract text is available yet for this article.
November 19, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27876003/pla2r-antibodies-and-pla2r-glomerular-deposits-in-psoriasis-patients-with-membranous-nephropathy
#18
Yong-Chun Ge, Bo Jin, Cai-Hong Zeng, Ming-Chao Zhang, Da-Cheng Chen, Ru Yin, Wei-Bo Le
BACKGROUND: The association between psoriasis and membranous nephropathy (MN) remains largely unclear. We examined the prevalence of serum PLA2R antibody and characterized the expression of PLA2R and THSD7A in glomeruli in patients with MN and psoriasis. METHODS: A total of 24 patients with MN without evidence of a secondary cause except psoriasis were enrolled. The clinical and pathological features were retrospectively analyzed. Serum anti-PLA2R antibody was measured using IFA Mosaic...
November 22, 2016: BMC Nephrology
https://www.readbyqxmd.com/read/27852637/mhc-class-ii-risk-alleles-and-amino-acid-residues-in-idiopathic-membranous-nephropathy
#19
Zhao Cui, Li-Jun Xie, Fang-Jin Chen, Zhi-Yong Pei, Li-Jie Zhang, Zhen Qu, Jing Huang, Qiu-Hua Gu, Yi-Miao Zhang, Xin Wang, Fang Wang, Li-Qiang Meng, Gang Liu, Xu-Jie Zhou, Li Zhu, Ji-Cheng Lv, Fan Liu, Hong Zhang, Yun-Hua Liao, Lu-Hua Lai, Pierre Ronco, Ming-Hui Zhao
Epitopes of phospholipase A2 receptor (PLA2R), the target antigen in idiopathic membranous nephropathy (iMN), must be presented by the HLA-encoded MHC class II molecules to stimulate autoantibody production. A genome-wide association study identified risk alleles at HLA and PLA2R loci, with the top variant rs2187668 within HLA-DQA1 showing a risk effect greater than that of the top variant rs4664308 within PLA2R1. How the HLA risk alleles affect epitope presentation by MHC class II molecules in iMN is unknown...
May 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/27807329/-role-of-m-type-phospholipase-a2-receptor-and-its-antibody-in-hepatitis-b-virus-associated-membranous-nephropathy
#20
Xiangqing Xu, Xuejing Zhu, Shuguang Yuan, Wenling Jiang, Yuncheng Xia, Hong Liu, Jun Li, Lin Sun, Youming Peng, Fuyou Liu
To examine levels of M-type phospholipase A2 receptor (PLA2R) and its antibody in the patients with hepatitis B virus-associated membranous nephropathy (HBV-MN), and to explore the correlation of PLA2R with laboratory parameters and pathological characteristics.
 Methods: A total of 49 adult patients with biopsy-proved HBV-MN were enrolled in this study. Levels of anti-PLA2R antibody in serum and PLA2R in renal tissue were detected. Patients were assigned into two groups: a positive PLA2R group and a negative PLA2R group...
October 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
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