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1.
Nefrología (Madr.) ; 31(3): 292-298, jun. 2011. ilus
Article in Spanish | IBECS | ID: ibc-103201

ABSTRACT

Introducción: La esclerosis tuberosa (ET) es una enfermedad sistémica, de herencia autosómica dominante, ocasionada por mutaciones en dos genes (TSC1 y TSC2), que causan la aparición de tumores (angiolipomas [AML], angiofibromas, astrocitomas, etc.). La proliferación inadecuada y constante que existe en la ET puede ser bloqueada por inhibidores de la kinasa mTOR (mammalian target of rapamycin), como la rapamicina. Material y métodos: Se han incluido 17 pacientes afectados de ET y, al menos, un AML mayor de 2 cm de diámetro diagnosticado por resonancia magnética (RM). Han recibido tratamiento con rapamicina durante 12 meses. Los niveles plásmáticos se han mantenido entre 4 y 8 ng/dl. El tamaño del AML se ha monitorizado semestralmente mediante RM abdominal. Resultados: A los 12 meses de la inclusión, con la RM se ha objetivado una disminución del tamaño del AML en todos los pacientes incluidos, mostrando una reducción de, al menos, un 50% en el 82,4% (14/17; intervalo de confianza [IC] 95% [56,57%, 96,20%]). El porcentaje medio de reducción fue del 66,3% (IC95 [56,9%, 75,6%]; p <0,0001). Los principales efectos secundarios observados han sido: aftas orales (5/17); hipertrigliceridemia (3/17); microcitosis e hipocromía (3/17); diarrea (2/17); acné (1/17); pielonefritis aguda (1/17), y proteinuria (1/17). Conclusiones: Los datos clínicos preliminares sugieren que la rapamicina puede desempeñar un papel beneficioso en el tratamiento de la ET. Nuestra experiencia en 17 pacientes tratados durante 12 meses demuestra seguridad y eficacia en la reducción de AML (AU)


Background: Tuberous sclerosis (TS) is a systemic disease, with an autosomal dominant pattern of inheritance caused by mutations in two genes (TSC1 and TSC2) that cause tumours (angiomyolipomas [AML], angiofibromas, astrocytomas). Constant and inadequate proliferation occurring in TS may be blocked by mTOR inhibitors (mammalian target of rapamycin), such as rapamycin. Material and methods: At present, our study includes 17 patients with TS. All had at least one AML greater than 2cm in diameter diagnosed by MRI. They received rapamycin during 12 months. Plasma levels remained stable between 4-8ng/dl. The AML size was monitored every six months by abdominal MRI. Results: At 12 months of inclusion, MRI indicated a decrease in the size of AML in all patients showing at least a 50% reduction in 82.4% (14/17, 95% CI [56.57%, 96.20%]). The mean percent reduction was 66.3% (95% CI [56.9%, 75.6%], P<.0001). The major side effects observed were: oral aphthous ulcers (5/17); hypertriglyceridemia (3/17); microcytosis and hypochromia (3/17); diarrhea (2/17); acne (1/17); acute pyelonephritis (1/17); and proteinuria (1/17). Conclusions: These preliminary clinical data suggest that rapamycin can play a beneficial role in the treatment of TS. Our experience in 17 patients treated for 12 months demonstrates safety and efficacy in reducing AML volume (AU)


Subject(s)
Humans , Angiomyolipoma/drug therapy , Sirolimus/pharmacokinetics , Tuberous Sclerosis/drug therapy , TOR Serine-Threonine Kinases/antagonists & inhibitors
2.
Nefrología (Madr.) ; 30(2): 185-194, mar.-abr. 2010. ilus, tab
Article in Spanish | IBECS | ID: ibc-104529

ABSTRACT

Introducción: Recientemente el grupo CKD-EPI (ChronicKidney Disease Epidemiology Collaboration) ha publicado una nueva ecuación de estimación del filtrado glomerular(FG) desarrollada a partir de una población de 8.254 individuosa los que se midió el FG mediante aclaramiento de iotalamato (media 68 ml/min/1,73 m2, DE 40ml/min/1,73 m2), y que incluye como variables la creatinina sérica, la edad, el sexo y la raza, con distintas versiones en función de la etnia, el sexo y el valor de la creatinina. La ecuación de CKD-EPI mejoró los resultados en cuanto a exactitud y precisión de la ecuación de elección actual MDRD-IDMS (Modification of Diet in Renal Disease-Isotopic Dilution Mass Spectrometry) en especial para valores de FG superior a 60 ml/min/1,73 m2 en un grupo de 3.896individuos. Material y métodos: El objetivo de nuestro estudio fue comparar los valores de FG estimado utilizando la nueva ecuación de CKD-EPI frente a MDRD-IDMS en una amplia cohorte de 14.427 pacientes (5.234 mujeres y 9.193hombres) y analizar las repercusiones que el uso de CKDEPI tendría a la hora de clasificar a la población en distintos estadios de enfermedad renal crónica (ERC) en función de su FG. Resultados: La media del FG estimado fue 0,6ml/min/1,73 m2 más alto por CKD-EPI que por MDRD-IDMS en el grupo total, 1,9 ml/min/1,73 m2 más alto en el grupo (..) (AU)


Introduction: A recent report by the CKD-EPI Chronic Kidney Disease Epidemiology Collaboration) group describes a new equation to estimate the glomerular filtration rate (GFR).This equation has been developed from a population of8,254 subjects who had the GFR measured by iothalamate clearance (mean 68 ml/min/1.73 m2, SD 40 ml/min/1.73 m2).It includes variables such as serum creatinine, age, sex and race with different formula according to race, sex and creatinine value. The CKD-EPI equation improved the accuracy and precision results of the current first-choice MDRDIDMS(Modification of Diet in Renal Disease-Isotopic Dilution Mass Spectrometry) formula, specially for GFR >60ml/min/1.73 m2 in a group of 3,896 subjects. Methods: The goal of our study was to compare the estimated GFR by using the new equation CKD-EPI with MDRD-IDMS in a wide cohort of 14,427 patients (5,234 women and 9,193 men),and to analyze the impact of the new CKD-EPI formula on (AU)


Subject(s)
Humans , Renal Insufficiency, Chronic/physiopathology , Glomerular Filtration Rate , Risk Factors , Age Factors , Creatinine/blood , Creatinine/urine , Kidney Function Tests
3.
Nefrologia ; 30(2): 185-94, 2010.
Article in Spanish | MEDLINE | ID: mdl-20038962

ABSTRACT

INTRODUCTION: A recent report by the CKD-EPI Chronic Kidney Disease Epidemiology Collaboration) group describes a new equation to estimate the glomerular filtration rate (GFR). This equation has been developed from a population of 8,254 subjects who had the GFR measured by iothalamate clearance (mean 68 mL/min/1.73 m2, SD 40 mL/min/1.73 m2). It includes variables such as serum creatinine, age, sex and race with different formula according to race, sex and creatinine value. The CKD-EPI equation improved the accuracy and precision results of the current first-choice MDRD-IDMS (Modification of Diet in Renal Disease-Isotopic Dilution Mass Spectrometry) formula, specially for GFR > 60 mL/min/1.73 m2 in a group of 3,896 subjects. METHODS: The goal of our study was to compare the estimated GFR by using the new equation CKD-EPI with MDRD-IDMS in a wide cohort of 14,427 patients (5,234 women and 9,193 men), and to analyze the impact of the new CKD-EPI formula on the staging of patients with CKD. RESULTS: Mean estimated GFR was 0.6 mL/min/1.73 m2 higher with CKD-EPI as compared to MDRD-IDMS for the whole group, 1.9 mL/min/1.73 m2 higher for women and 0.2 mL/min/1.73 m2 lower for men. The percentage of CKD staging concordancy between equations varied from 79.4 % for stage 3A and 98.6% for stage 5. For those patients younger than 70 years, 18.9 % and 24 % MDRD-IDMS stages 3B and 3A were reclassified as CKD 3A and 2 by CKD-EPI, respectively. For the same stages in the group younger than 70 years, the percentage of reclassified patients increased up to 34.4% and 33.4%, respectively. CONCLUSION: The new CKD-EPI equation to estimate the GFR reclassifies an important number of patients to higher CKD stages (higher GFR), specially younger women, classified as CKD stage 3 by MDRD-IDMS.


Subject(s)
Algorithms , Glomerular Filtration Rate , Kidney Diseases/physiopathology , Adolescent , Adult , Age Factors , Aged , Aged, 80 and over , Chronic Disease , Cohort Studies , Creatinine/blood , Female , Humans , Iothalamic Acid/pharmacokinetics , Kidney Diseases/classification , Male , Middle Aged , Proteinuria/etiology , Proteinuria/physiopathology , Severity of Illness Index , Sex Factors , Young Adult
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