12 results on '"Elías, Jatem Escalante"'
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2. Value of urinary levels of interleukin-6, epidermal growth factor, monocyte chemoattractant protein type 1 and transforming growth factor β1 in predicting the extent of fibrosis lesions in kidney biopsies of patients with IgA nephropathy
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Alfons Segarra-Medrano, Clara Carnicer-Caceres, Naiara Valtierra-Carmeno, Irene Agraz-Pamplona, Natalia Ramos-Terrades, Elías Jatem Escalante, and Elena Ostos-Roldan
- Subjects
Biomarkers ,Interleukin-6 ,Epidermal growth factor ,Monocyte chemoattractant protein type1 ,Transforming growth factor β1 ,Interstitial fibrosis ,IgA nephropathy ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Objective: To analyse the associations between urinary levels of IL-6 EGF, MCP-1 and TGFβ1 and clinical, biochemical and histopathological characteristics in patients with primary IgA nephropathy and their ability to predict the extent of lesions of glomerular and/or interstitial sclerosis. Patients and methods: A total of 58 patients with IgA nephropathy were studied. We determined the urine levels of IL-6, EGF, MCP-1, and TGFβ1 at the time of diagnosis. The extent of glomerular and interstitial fibrosis was analysed by quantitative morphometry and kidney biopsies were classified according to the Oxford criteria. We analysed the ability of these molecules to predict the extent of glomerular and interstitial fibrosis lesions. Results: IL-6, TGFβ1 and MCP-1 were associated with focal glomerulosclerosis and interstitial fibrosis extension but not with the presence of mesangial, extracapillary or endocapillary proliferation. EGF showed a negative association with interstitial fibrosis. By categorising patients according to the Oxford classification, patients with T1 and T2 scores had significantly higher levels of IL-6, MCP-1, TGF-β1 and significantly lower levels of EGF than patients with T0 scores. By multiple regression and logistic regression analyses, the levels of MCP-1, IL-6 and EGF were independent predictors of the fibrosis surface, after adjusting for age and eGFR. Conclusion: The urinary concentration of IL-6, EGF and MCP-1 provides additional information that significantly improves the estimation of the surface of interstitial fibrosis in patients with IgA nephropathy.
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- 2017
- Full Text
- View/download PDF
3. Valor de los niveles urinarios de interleucina 6, factor de crecimiento epidérmico, proteína quimioatractante de monocitos de tipo 1 y factor de crecimiento transformante β1 para la predicción de la extensión de las lesiones de fibrosis en biopsias de enfermos con nefropatía IgA
- Author
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Alfons Segarra-Medrano, Clara Carnicer-Caceres, Naiara Valtierra-Carmeno, Irene Agraz-Pamplona, Natalia Ramos-Terrades, Elías Jatem Escalante, and Elena Ostos-Roldan
- Subjects
Biomarcadores ,Interleucina 6 ,Factor de crecimiento epidérmico ,Proteína quimioatractante de monocitos de tipo 1 ,Factor de crecimiento transformante β1 ,Fibrosis intersticial ,Nefropatía IgA ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Objetivo: Analizar las asociaciones entre el nivel urinario de IL-6, EGF, MCP-1 y TGFβ1 y las características clínicas, bioquímicas y anatomopatológicas en enfermos con nefropatía IgA primaria y determinar su capacidad para realizar una estimación de la extensión de las lesiones de esclerosis glomerular e intersticial. Pacientes y métodos: Se estudió a 58 enfermos con nefropatía IgA. Se determinaron los niveles urinarios de IL-6, EGF, MCP-1 y TGFβ1 en el momento del diagnóstico. Tras realizar un análisis de la extensión de las lesiones renales mediante morfometría cuantitativa y mediante los criterios de Oxford, se analizó la capacidad de dichas moléculas para estimar la extensión de las lesiones glomerulares e intersticiales de fibrosis. Resultados: La IL-6, MCP-1 y TGF-β1 se asociaron a glomeruloesclerosis focal y a la extensión de la fibrosis intersticial, pero no a la presencia de proliferación mesangial, intracapilar o extracapilar. EGF presentó una asociación negativa con la fibrosis intersticial. Al categorizar a los enfermos según la clasificación de Oxford, los enfermos con scores T1 y T2 presentaron niveles significativamente superiores de IL-6, MCP-1 y TGFβ1, y niveles de EGF significativamente inferiores que los enfermos con T0. Tanto mediante regresión múltiple como mediante regresión logística, los niveles de MCP-1, IL-6 y EGF fueron predictores independientes de la superficie de fibrosis, tras ajustar por edad y FGe. Conclusión: La determinación de la concentración urinaria de IL-6, EGF y MCP-1 proporciona una información adicional que mejora de forma significativa la estimación de la superficie de fibrosis intersticial.
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- 2017
- Full Text
- View/download PDF
4. Estudio de las variables asociadas a la activación local del complemento en la nefropatía IgA idiopática
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Alfons Segarra-Medrano, Clara Carnicer-Caceres, Naiara Valtierra-Carmeno, Irene Agraz-Pamplona, Natalia Ramos-Terrades, Elías Jatem Escalante, and Elena Ostos-Roldan
- Subjects
Activación del complemento ,C4d ,Lectina de unión a la manosa ,Properdina ,Nefropatía IgA ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Objetivos: 1) Identificar las variables que se asocian con los niveles urinarios de MBL, C4d y C5b-9 en enfermos con nefropatía IgA idiopática. 2) Analizar si los niveles urinarios de MBL o C4d son útiles para identificar la presencia de depósitos mesangiales de C4d/MBL. Pacientes y método: Se estudió a 96 enfermos con nefropatía IgA primaria. Se registraron las variables demográficas, clínicas y bioquímicas en el momento del diagnóstico. Las lesiones renales se cuantificaron mediante la clasificación de Oxford. En las biopsias, se realizaron tinciones inmunohistoquímicas para MBL, properdina, C4d, y C5b-9. En orina, se determinó el nivel de properdina, MBL, C4d y C5b-9. Resultados: Los predictores independientes de los niveles de C4d y MBL en orina fueron el depósito mesangial de cada una de ellas y, en menor grado, la proteinuria. Los predictores independientes de los niveles urinarios de C5b-9 fueron los niveles de MBL y properdina, y la proteinuria. La excreción urinaria de C4d tuvo una sensibilidad del 90% (IC 95%: 58,7-99) y una especificidad del 73% (IC 95%: 54-87) para la detección de depósitos mesangiales de C4d y el nivel de MBL tuvo una sensibilidad del 83,9% (IC 95%: 62-95) y una especificidad del 81,6% (IC 95%: 65-92) para identificar depósitos mesangiales de MBL. Conclusión: El principal predictor de la concentración urinaria de C4d y MBL es la presencia de depósitos mesangiales de ellas. La MBL podría contribuir a la activación del complemento en la luz tubular a través de la vía de las lectinas. Los niveles urinarios de MBL y C4d podrían ser biomarcadores sensibles y específicos para la identificación de los enfermos que presentan depósitos mesangiales de MBL o C4d.
- Published
- 2017
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5. Study of the variables associated with local complement activation in IgA nephropathy
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Alfons Segarra-Medrano, Clara Carnicer-Caceres, Naiara Valtierra-Carmeno, Irene Agraz-Pamplona, Natalia Ramos-Terrades, Elías Jatem Escalante, and Elena Ostos-Roldan
- Subjects
Complement activation ,C4d ,Mannose binding lectin ,Properdin ,IgA nephropathy ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
Objectives: 1. To identify the variables that are associated with urinary levels of properdin, MBL, C4d, and C5b-9 in patients with idiopathic IgA nephropathy. 2. To analyse whether urinary levels of MBL and/or C4d are useful for identifying the presence of mesangial deposits of C4d/MBL. Patients and method: A total of 96 patients with IgA nephropathy were studied. Demographic, clinical and biochemical variables were recorded at the time of diagnosis. Renal lesions were quantified using the Oxford classification. Immunohistochemical staining for MBL, MASP-2, properdin, C4d, and C5b-9 was performed in kidney biopsies, and in urine, the levels of properdin, MBL, C4d and C5b-9 were determined. Results: In multivariate analysis, the independent predictors of C4d and MBL levels in urine were the mesangial deposits of each protein and, to a lesser extent, the urinary protein excretion. The independent predictors of urinary levels of C5b-9 were MBL properdin and proteinuria. Urinary excretion of C4d had a sensitivity of 90% (95% CI: 58.7–99) and a specificity of 73% (95% CI: 54–87) for detecting mesangial C4d deposits, and the level of MBL had a sensitivity of 83.9% (95% CI: 62–95) and a specificity of 81.6% (95% CI: 65–92) for identifying mesangial deposits of MBL. Conclusion: The main predictor of urinary concentration of C4d and MBL was the presence of their respective mesangial deposits. Urine MBL may contribute to complement activation in the tubular luz through the lectin pathway. Urinary levels of MBL and C4d could be sensitive and specific biomarkers for the identification of patients with mesangial deposits of MBL and C4d.
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- 2017
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6. Características clínicas, evolución y pronóstico de la nefropatía membranosa idiopática en función de la presencia de anticuerpos contra el receptor tipo M de la fosfolipasa A2
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Elías Jatem Escalante, Alfons Segarra Medrano, Clara Carnicer Cáceres, M. Adoración Martín-Gómez, María Teresa Salcedo Allende, Helena Ostos Roldan, and Irene Agraz Pamplona
- Subjects
Nefropatía membranosa idiopática ,Anticuerpos anti-PLA2R ,Síndrome nefrótico ,Pronóstico ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
En la nefropatía membranosa (NM), la presencia de anticuerpos antirreceptor tipo M de fosfolipasa A2 se considera altamente específica para las formas idiopáticas, pero no se ha demostrado que la presencia de dichos anticuerpos se asocie a un determinado perfil clínico. Objetivo: Analizar si existe alguna diferencia en cuanto al perfil clínico inicial, evolución y pronóstico entre pacientes con NM idiopática en función de la presencia de anticuerpos anti-PLA2R. Métodos: Se estudió a 85 enfermos con NM idiopática, 55 eran anti-PLA2R positivos y 30 negativos. Se registraron las variables clínicas, bioquímicas y anatomopatológicas al momento del diagnóstico, la frecuencia de remisión espontánea, la incidencia de respuesta al tratamiento de primera línea, la frecuencia y número de recidivas, la supervivencia de la función renal libre de tratamiento sustitutivo renal, la supervivencia de la función renal libre de insuficiencia renal crónica y la frecuencia de aparición de enfermedades neoplásicas, infecciosas o autoinmunes durante el seguimiento. Resultados: Al momento del diagnóstico, los enfermos anti-PLA2R negativos presentaron significativamente mayor edad y frecuencia de remisión espontánea. No se apreciaron diferencias en la respuesta al tratamiento de primera línea, frecuencia ni número de recidivas, supervivencia de la función renal libre de tratamiento sustitutivo renal ni supervivencia de función renal libre de insuficiencia renal crónica. Conclusiones: Los enfermos con NM idiopática anti-PLA2R negativos presentaron mayor edad, menor filtrado glomerular inicial y mayor frecuencia de remisión espontánea que los enfermos anti-PLA2R positivos. Sin embargo, entre ambos grupos de enfermos, no se observaron diferencias en cuanto a la respuesta y al tratamiento, aparición de recidivas ni pronóstico final.
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- 2015
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7. Clinical features, course and prognosis of idiopathic membranous nephropathy depending on the presence of antibodies against M-type phospholipase A2 receptor
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Elías Jatem Escalante, Alfons Segarra Medrano, Clara Carnicer Cáceres, M. Adoración Martín-Gómez, María Teresa Salcedo Allende, Helena Ostos Roldan, and Irene Agraz Pamplona
- Subjects
Idiopathic membranous nephropathy ,Anti-PLA2R antibodies ,Nephrotic syndrome ,Prognosis ,Diseases of the genitourinary system. Urology ,RC870-923 - Abstract
In membranous nephropathy, the presence of antibodies against M-type phospholipase A2 receptor is considered highly specific for idiopathic forms. However, no specific association to a particular clinical profile has been found for such antibodies. Objective: To assess potential differences in initial clinical profile, course and prognosis of idiopathic membranous nephropathy depending on the presence of anti-PLA2R antibodies. Methods: Eighty-five patients with idiopathic membranous nephropathy were included (55 anti-PLA2R-positive and 30 anti-PLA2R-negative). Clinical, biochemical and pathological variables were recorded at the time of diagnosis. Frequency of spontaneous remission, incidence of response to first-line therapy, frequency and number of recurrences, survival of renal function free from renal replacement therapy, survival of renal function free from chronic renal insufficiency and frequency of occurrence of malignant, infectious or autoimmune diseases during follow-up were recorded. Results: At the time of diagnosis, anti-PLA2R-negative patients were significantly older and had a higher frequency of spontaneous remission. No differences were noted in the response to first-line treatment, frequency and number of recurrences, survival of renal function free from renal replacement therapy, or survival of renal function free from chronic renal insufficiency. Conclusions: Anti-PLA2R-negative patients with idiopathic membranous nephropathy were older and experienced spontaneous remission more often than anti-PLA2R-positive patients. No differences in terms of treatment response, recurrences, and final prognosis were observed between both groups of patients.
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- 2015
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8. Valor de los niveles urinarios de interleucina 6, factor de crecimiento epidérmico, proteína quimioatractante de monocitos de tipo 1 y factor de crecimiento transformante β1 para la predicción de la extensión de las lesiones de fibrosis en biopsias de enfermos con nefropatía IgA
- Author
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Naiara Valtierra-Carmeno, Clara Carnicer-Cáceres, Elena Ostos-Roldan, Alfons Segarra-Medrano, Natalia Ramos-Terrades, Irene Agraz-Pamplona, and Elías Jatem Escalante
- Subjects
0301 basic medicine ,Nefropatía IgA ,030232 urology & nephrology ,Proteína quimioatractante de monocitos de tipo 1 ,lcsh:Diseases of the genitourinary system. Urology ,lcsh:RC870-923 ,Factor de crecimiento epidérmico ,Fibrosis intersticial ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Biomarcadores ,Nephrology ,Factor de crecimiento transformante β1 ,Interleucina 6 - Abstract
Resumen Objetivo Analizar las asociaciones entre el nivel urinario de IL-6, EGF, MCP-1 y TGFβ1 y las caracteristicas clinicas, bioquimicas y anatomopatologicas en enfermos con nefropatia IgA primaria y determinar su capacidad para realizar una estimacion de la extension de las lesiones de esclerosis glomerular e intersticial. Pacientes y metodos Se estudio a 58 enfermos con nefropatia IgA. Se determinaron los niveles urinarios de IL-6, EGF, MCP-1 y TGFβ1 en el momento del diagnostico. Tras realizar un analisis de la extension de las lesiones renales mediante morfometria cuantitativa y mediante los criterios de Oxford, se analizo la capacidad de dichas moleculas para estimar la extension de las lesiones glomerulares e intersticiales de fibrosis. Resultados La IL-6, MCP-1 y TGF-β1 se asociaron a glomeruloesclerosis focal y a la extension de la fibrosis intersticial, pero no a la presencia de proliferacion mesangial, intracapilar o extracapilar. EGF presento una asociacion negativa con la fibrosis intersticial. Al categorizar a los enfermos segun la clasificacion de Oxford, los enfermos con scores T1 y T2 presentaron niveles significativamente superiores de IL-6, MCP-1 y TGFβ1, y niveles de EGF significativamente inferiores que los enfermos con T0. Tanto mediante regresion multiple como mediante regresion logistica, los niveles de MCP-1, IL-6 y EGF fueron predictores independientes de la superficie de fibrosis, tras ajustar por edad y FGe. Conclusion La determinacion de la concentracion urinaria de IL-6, EGF y MCP-1 proporciona una informacion adicional que mejora de forma significativa la estimacion de la superficie de fibrosis intersticial.
- Published
- 2017
9. Prognostic value of the dynamics of M-type phospholipase A2 receptor antibody titers in patients with idiopathic membranous nephropathy treated with two different immunosuppression regimens
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Alfonso Segarra Medrano, Elías Jatem Escalante, Elena Ostos Roldán, Natalia Ramos Terrades, Karla Viviana Arredondo Agudelo, Irene Agraz Pamplona, Naiara Valtierra Carmeno, Maria Teresa Salcedo Allende, Juliana Jaramillo Vasquez, and Clara Carnicer Cáceres
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Adult ,Male ,Health, Toxicology and Mutagenesis ,medicine.medical_treatment ,Clinical Biochemistry ,Glomerulonephritis, Membranous ,Biochemistry ,Membranous nephropathy ,Humans ,Medicine ,In patient ,Autoantibodies ,biology ,business.industry ,Receptors, Phospholipase A2 ,Antibody titer ,Immunosuppression ,Middle Aged ,Prognosis ,medicine.disease ,Idiopathic Membranous Nephropathy ,Treatment Outcome ,Immunology ,biology.protein ,Female ,Rituximab ,Antibody ,business ,Biomarkers ,Immunosuppressive Agents ,Phospholipase A2 receptor ,medicine.drug - Abstract
Context: The dynamics of anti-phospholipase A2 antibody titers during treatment could predict clinical responses in patients with membranous nephropathy.Objectives: We analyzed the predictive value of the dynamics of these antibodies on clinical responses.Materials and methods: The serum antibody levels were measured before and during treatment in 79 patients with anti-phospholipase A2 receptor antibody membranous nephropathy treated with two different immunosuppression regimensResults: In both groups of patients, the relative reduction in antibody titers at 3 and 6 months preceded and predicted the clinical responses.Conclusions: Antibody titer dynamics was useful for predicting clinical responses.
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- 2014
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10. Estudio de las variables asociadas a la activación local del complemento en la nefropatía IgA idiopática
- Author
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Elena Ostos-Roldan, Irene Agraz-Pamplona, Naiara Valtierra-Carmeno, Clara Carnicer-Cáceres, Elías Jatem Escalante, Natalia Ramos-Terrades, and Alfons Segarra-Medrano
- Subjects
0301 basic medicine ,Nefropatía IgA ,Properdina ,030232 urology & nephrology ,lcsh:Diseases of the genitourinary system. Urology ,lcsh:RC870-923 ,C4d ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Lectina de unión a la manosa ,Nephrology ,Activación del complementoC4d ,Activación del complemento - Abstract
Resumen Objetivos 1) Identificar las variables que se asocian con los niveles urinarios de MBL, C4d y C5b-9 en enfermos con nefropatia IgA idiopatica. 2) Analizar si los niveles urinarios de MBL o C4d son utiles para identificar la presencia de depositos mesangiales de C4d/MBL. Pacientes y metodo Se estudio a 96 enfermos con nefropatia IgA primaria. Se registraron las variables demograficas, clinicas y bioquimicas en el momento del diagnostico. Las lesiones renales se cuantificaron mediante la clasificacion de Oxford. En las biopsias, se realizaron tinciones inmunohistoquimicas para MBL, properdina, C4d, y C5b-9. En orina, se determino el nivel de properdina, MBL, C4d y C5b-9. Resultados Los predictores independientes de los niveles de C4d y MBL en orina fueron el deposito mesangial de cada una de ellas y, en menor grado, la proteinuria. Los predictores independientes de los niveles urinarios de C5b-9 fueron los niveles de MBL y properdina, y la proteinuria. La excrecion urinaria de C4d tuvo una sensibilidad del 90% (IC 95%: 58,7-99) y una especificidad del 73% (IC 95%: 54-87) para la deteccion de depositos mesangiales de C4d y el nivel de MBL tuvo una sensibilidad del 83,9% (IC 95%: 62-95) y una especificidad del 81,6% (IC 95%: 65-92) para identificar depositos mesangiales de MBL. Conclusion El principal predictor de la concentracion urinaria de C4d y MBL es la presencia de depositos mesangiales de ellas. La MBL podria contribuir a la activacion del complemento en la luz tubular a traves de la via de las lectinas. Los niveles urinarios de MBL y C4d podrian ser biomarcadores sensibles y especificos para la identificacion de los enfermos que presentan depositos mesangiales de MBL o C4d.
- Published
- 2017
11. Value of urinary levels of interleukin-6, epidermal growth factor, monocyte chemoattractant protein type1 and transforming growth factor β1 in predicting the extent of fibrosis lesions in kidney biopsies of patients with IgA nephropathy
- Author
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Alfons, Segarra-Medrano, Clara, Carnicer-Caceres, Naiara, Valtierra-Carmeno, Irene, Agraz-Pamplona, Natalia, Ramos-Terrades, Elías, Jatem Escalante, and Elena, Ostos-Roldan
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Adult ,Male ,Epidermal Growth Factor ,Interleukin-6 ,Biopsy ,Kidney Glomerulus ,Age Factors ,Glomerulonephritis, IGA ,Middle Aged ,Kidney ,Fibrosis ,Severity of Illness Index ,Transforming Growth Factor beta1 ,Young Adult ,Humans ,Female ,Biomarkers ,Chemokine CCL2 ,Aged ,Glomerular Filtration Rate - Abstract
To analyse the associations between urinary levels of IL-6 EGF, MCP-1 and TGFβ1 and clinical, biochemical and histopathological characteristics in patients with primary IgA nephropathy and their ability to predict the extent of lesions of glomerular and/or interstitial sclerosis.A total of 58 patients with IgA nephropathy were studied. We determined the urine levels of IL-6, EGF, MCP-1, and TGFβ1 at the time of diagnosis. The extent of glomerular and interstitial fibrosis was analyzed by quantitative morphometry and kidney biopsies were classified according to the Oxford criteria. We analysed the ability of these molecules to predict the extent of glomerular and interstitial fibrosis lesions.IL-6, TGFβ1 and MCP-1 were associated with focal glomerulosclerosis and interstitial fibrosis extension but not with the presence of mesangial, extracapillary or endocapillary proliferation. EGF showed a negative association with interstitial fibrosis. By categorising patients according to the Oxford classification, patients with T1 and T2 scores had significantly higher levels of IL-6, MCP-1, TGF-β1 and significantly lower levels of EGF than patients with T0 scores. By multiple regression and logistic regression analyses, the levels of MCP-1, IL-6 and EGF were independent predictors of the fibrosis surface, after adjusting for age and eGFR.The urinary concentration of IL-6, EGF and MCP-1 provides additional information that significantly improves the estimation of the surface of interstitial fibrosis in patients with IgA nephropathy.
- Published
- 2016
12. Prevalence, diagnostic value and clinical characteristics associated with the presence of circulating levels and renal deposits of antibodies against the M-type phospholipase A2 receptor in idiopathic membranous nephropathy
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Alfonso, Segarra-Medrano, Elías, Jatem-Escalante, M Teresa, Quiles-Pérez, M Teresa, Salcedo, M Antonia, Arbós-Via, Helena, Ostos, Naiara, Valtierra, Clara, Carnicer-Cáceres, and Irene, Agraz-Pamplona
- Subjects
Male ,Chromobox Protein Homolog 5 ,Receptors, Phospholipase A2 ,Prevalence ,Humans ,Female ,Middle Aged ,Kidney ,Glomerulonephritis, Membranous ,Autoantibodies - Abstract
The M-type phospholipase A2 receptor (PLA2R) has been identified as one of the target antigens of the autoimmune response in idiopathic membranous nephropathy (MN). The prevalence of anti-PLA2R antibodies in patients with idiopathic MN is around 70% but this varies in accordance with geographic region, and until present, anti-PLA2R has not been shown to be associated with any particular clinical profile of the disease.We studied 64 adults with nephrotic syndrome who were diagnosed with MN, confirmed by renal biopsy. Forty-seven patients had idiopathic MN and 17 had secondary MN. We determined the presence of circulating anti-PLA2R antibodies by indirect immunofluorescence (IIF) and their titre by ELISA, and we analysed the presence of anti-PLA2R antibody renal deposits by immunohistochemical techniques. We calculated the sensitivity and specificity of the IIF and ELISA techniques for the identification of patients with renal deposits and for the identification of those with idiopathic MN and we tested whether there were differences in the clinical profile of the disease at the time of diagnosis according to the presence or absence of anti-PLA2R antibodies.We did not observe significant differences in the clinical-demographic variables between patients with idiopathic and secondary MN. The prevalence of anti-PLA2R glomerular deposits by IHC was 76.6%. The IIF and ELISA techniques had a similar sensitivity (IIF 94.4% and ELISA 97.2%) and specificity (100%) for the identification of patients with anti-PLA2R renal deposits and the detection of circulating anti-PLA2R antibodies. The determination of anti-PLA2R by IIF identified patients with idiopathic MN with a sensitivity of 72.3% and a specificity of 94.2%. A titre of antibodies15RU/ml measured by ELISA had a sensitivity of 74.45% and a specificity of 94.2% for the identification of patients with idiopathic MN. Patients with idiopathic MN and anti-PLA2R had significantly higher proteinuria figures (13.25 [P25-P75: 9.05-15.87] compared to 9.43 [P25-P75: 6.30-15] g/day, P:.018). No statistical correlation was observed between the antibody titre measured by ELISA and age, glomerular filtration rate or 24-hour proteinuria or albuminaemia.The techniques employed to determine anti-PLA2R in patients with MN are highly specific for the diagnosis of idiopathic forms of the glomerular disease. The frequency with which patients with MN and anti-PLA2R were identified is similar to that reported in previous studies. Staining by immunohistochemistry is the most sensitive method for detecting cases of MN associated with the presence of anti-PLA2R antibodies. The IIF and ELISA techniques allow circulating anti-PLA2R antibodies to be detected in most patients with renal deposits, but they may very infrequently have false negative results. The concordance of these tests is high. Patients with idiopathic MN and anti-PLA2R antibody renal deposits have higher proteinuria than patients that are anti-PLA2R negative, but the differences have little clinical importance.
- Published
- 2013
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