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        "resumen" => "<p class="elsevierStylePara"><span class="elsevierStyleBold">Antecedentes&#58;</span>&#160;Los pacientes con nefropat&#237;a end&#233;mica de los Balcanes &#40;NEB&#41; en hemodi&#225;lisis necesitan una dosis m&#225;s elevada de eritropoyetina recombinante humana que los pacientes con otras enfermedades renales para poder mantener el nivel de hemoglobina deseado&#46; <span class="elsevierStyleBold">Objetivos&#58;</span><span class="elsevierStyleBold"> </span>Comparar la farmacocin&#233;tica de la eritropoyetina beta administrada subcut&#225;neamente a pacientes en hemodi&#225;lisis con NEB u otras enfermedades renales&#46;<span class="elsevierStyleBold">&#160;</span><span class="elsevierStyleBold">M&#233;todos&#58;</span>&#160;A 10 pacientes hemodializados con NEB y 14 pacientes hemodializados con otras enfermedades renales se les administr&#243; subcut&#225;neamente eritropoyetina &#40;EPO&#41; recombinante humana &#40;75&#160;U&#47;kg&#41;&#46; El nivel de EPO en plasma previo a la dosis se sustrajo de todos los niveles que se obtuvieron tras administrarla&#46; Los par&#225;metros farmacocin&#233;ticos relevantes se calcularon tras el an&#225;lisis farmacocin&#233;tico no compartimental con ayuda de la aplicaci&#243;n Kinetica &#40;Thermo Scientific&#44; versi&#243;n 5&#46;0&#41;&#46;<span class="elsevierStyleBold"> </span><span class="elsevierStyleBold">Resultados&#58;</span> Aunque la concentraci&#243;n basal de EPO en el plasma era similar en pacientes con NEB &#40;20&#44;1&#160;&#177;&#160;10&#44;3&#160;U&#47;l&#41; y en pacientes con otras enfermedades renales &#40;15&#44;1&#160;&#177;&#160;8&#44;1&#160;U&#47;l&#59; p&#160;&#61;&#160;0&#44;1964&#41;&#44; se apreciaron diferencias significativas entre los grupos con respecto a la constante de eliminaci&#243;n &#40;0&#44;016&#160;&#177;&#160;0&#44;006 vs&#46; 0&#44;026&#160;&#177;&#160;0&#44;011&#160;h<span class="elsevierStyleSup">-1</span>&#59; p&#160;&#61;&#160;0&#44;020&#41; y a la semivida de eliminaci&#243;n &#40;50&#44;24&#160;&#177;&#160;19&#44;12 vs&#46; 33&#44;79&#160;&#177;&#160;18&#44;91&#160;h&#44; p&#160;&#61;&#160;0&#44;048&#41;&#46; Estas diferencias resultaron igualmente significativas tras ajustar los valores en funci&#243;n de las caracter&#237;sticas de los pacientes &#40;edad&#44; sexo&#44; duraci&#243;n de la hemodi&#225;lisis&#44; ferritina&#44; hormona paratiroidea y uso de inhibidores de la enzima de conversi&#243;n de la angiotensina&#41;&#46; No obstante&#44; no se observaron diferencias significativas entre los grupos en los siguientes par&#225;metros ni antes ni despu&#233;s de efectuar los ajustes pertinentes&#58; concentraci&#243;n m&#225;xima de EPO&#44; tiempo en alcanzar la concentraci&#243;n m&#225;xima de EPO&#44; &#225;rea bajo la curva extrapolada al infinito a partir de la administraci&#243;n de la dosis&#44; aclaramiento y tiempo medio de permanencia de la EPO&#46;<span class="elsevierStyleBold">&#160;</span><span class="elsevierStyleBold">Conclusi&#243;n&#58;</span>&#160;El an&#225;lisis farmacocin&#233;tico de la eritropoyetina beta revel&#243; que la semivida de eliminaci&#243;n era significativamente m&#225;s larga en los pacientes con NEB&#44; hallazgo que debe ser confirmado en un estudio bien controlado con una muestra m&#225;s grande&#46;</p>"
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        "resumen" => "<p class="elsevierStylePara"><span class="elsevierStyleBold">Background&#58;</span> Balkan endemic nephropathy &#40;BEN&#41; hemodialysis patients require a higher dose of recombinant human erythropoietin for maintaining target hemoglobin level than patients with other kidney diseases&#46;&#160;<span class="elsevierStyleBold">Objectives&#58; </span>Comparison of the pharmacokinetics of beta-erythropoietin given subcutaneously to hemodialysis patients with BEN or other kidney diseases &#40;non-BEN&#41;&#46;<span class="elsevierStyleBold"> Methods&#58;</span> Recombinant human erythropoietin &#40;75U&#47;kg&#41; was administered subcutaneously to 10 BEN and 14 non-BEN hemodialysis patients&#46; The predose plasma level of erythropoietin &#40;Epo&#41; was subtracted from all postdose levels&#46; The relevant pharmacokinetic parameters were calculated after noncompartmental pharmacokinetic analysis using Kinetica software &#40;Thermo Scientific&#44; ver&#46;5&#46;0&#41;&#46;<span class="elsevierStyleBold"> Results&#58;</span> Although basal plasma Epo concentration was similar in BEN &#40;20&#46;1&#177;10&#46;3U&#47;L&#41; and non-BEN &#40;15&#46;1&#177;8&#46;1U&#47;L&#59; p&#61;&#46;1964&#41; patients&#44; there were significant differences between the groups for elimination rate constant &#40;0&#46;016&#177;0&#46;006 vs 0&#46;026&#177;0&#46;011 hr<span class="elsevierStyleSup">-1</span>&#59; p&#61;&#46;020&#41; and elimination half-life &#40;50&#46;24&#177;19&#46;12 vs 33&#46;79&#177;18&#46;91 hr&#44; p&#61;&#46;048&#41;&#46; These differences remained significant after adjustment for patient characteristics &#40;age&#44; sex&#44; hemodialysis duration&#44; ferritin&#44; PTH and ACEI use&#41;&#46; No significant differences between groups were found in maximal Epo concentration&#44; time to maximum Epo concentration&#44; area under the curve from time of dosing extrapolated to infinity&#44; clearance&#44; mean residence time of Epo between groups both before and after adjustment&#46;<span class="elsevierStyleBold"> Conclusion&#58;</span> Pharmacokinetic analysis of beta-erythropoietin detected a significantly longer elimination half-life in BEN than in non BEN patients&#46; This finding needs to be confirmed in a well-controlled study with a larger sample size&#46;</p>"
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Información de la revista
Vol. 33. Núm. 4.julio 2013
Páginas 443-622
Vol. 33. Núm. 4.julio 2013
Páginas 443-622
Acceso a texto completo
La farmacocinética de la eritropoyetina recombinante humana en pacientes con nefropatía endémica de los Balcanes
The Pharmacokinetics of Recombinant Human Erythropoietin in Balkan Endemic Nephropathy Patients
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15111
Vi¿nja Le¿aića, Nenad Petkovićb, Ivko Marićc, Branislava Miljkovićd, Katarina Vučićevićd, Sanja Simić-Ogrizovića, Vesna Pejovicc, Ljubica Djukanoviće
a University of Belgrade, Medical Faculty, Serbia, b Clinical Centre of Serbia, Department of Nephrology, Belgrade, Serbia,
b FMC Center ¿amac, BH, ¿amac, BH,
c Special Hospital for Endemic Nephropathy, Lazarevac, Serbia,
d Department of Pharmacokinetics and Clinical Pharmacy, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia,
e Serbian Medical Society, Academy of Medical Science, Belgrade, Serbia,
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Antecedentes: Los pacientes con nefropatía endémica de los Balcanes (NEB) en hemodiálisis necesitan una dosis más elevada de eritropoyetina recombinante humana que los pacientes con otras enfermedades renales para poder mantener el nivel de hemoglobina deseado. Objetivos: Comparar la farmacocinética de la eritropoyetina beta administrada subcutáneamente a pacientes en hemodiálisis con NEB u otras enfermedades renales. Métodos: A 10 pacientes hemodializados con NEB y 14 pacientes hemodializados con otras enfermedades renales se les administró subcutáneamente eritropoyetina (EPO) recombinante humana (75 U/kg). El nivel de EPO en plasma previo a la dosis se sustrajo de todos los niveles que se obtuvieron tras administrarla. Los parámetros farmacocinéticos relevantes se calcularon tras el análisis farmacocinético no compartimental con ayuda de la aplicación Kinetica (Thermo Scientific, versión 5.0). Resultados: Aunque la concentración basal de EPO en el plasma era similar en pacientes con NEB (20,1 ± 10,3 U/l) y en pacientes con otras enfermedades renales (15,1 ± 8,1 U/l; p = 0,1964), se apreciaron diferencias significativas entre los grupos con respecto a la constante de eliminación (0,016 ± 0,006 vs. 0,026 ± 0,011 h-1; p = 0,020) y a la semivida de eliminación (50,24 ± 19,12 vs. 33,79 ± 18,91 h, p = 0,048). Estas diferencias resultaron igualmente significativas tras ajustar los valores en función de las características de los pacientes (edad, sexo, duración de la hemodiálisis, ferritina, hormona paratiroidea y uso de inhibidores de la enzima de conversión de la angiotensina). No obstante, no se observaron diferencias significativas entre los grupos en los siguientes parámetros ni antes ni después de efectuar los ajustes pertinentes: concentración máxima de EPO, tiempo en alcanzar la concentración máxima de EPO, área bajo la curva extrapolada al infinito a partir de la administración de la dosis, aclaramiento y tiempo medio de permanencia de la EPO. Conclusión: El análisis farmacocinético de la eritropoyetina beta reveló que la semivida de eliminación era significativamente más larga en los pacientes con NEB, hallazgo que debe ser confirmado en un estudio bien controlado con una muestra más grande.

Palabras clave:
Farmacocinética
Palabras clave:
Eritropoyetina recombinante humana
Palabras clave:
Nefropatía endémica de los Balcanes

Background: Balkan endemic nephropathy (BEN) hemodialysis patients require a higher dose of recombinant human erythropoietin for maintaining target hemoglobin level than patients with other kidney diseases. Objectives: Comparison of the pharmacokinetics of beta-erythropoietin given subcutaneously to hemodialysis patients with BEN or other kidney diseases (non-BEN). Methods: Recombinant human erythropoietin (75U/kg) was administered subcutaneously to 10 BEN and 14 non-BEN hemodialysis patients. The predose plasma level of erythropoietin (Epo) was subtracted from all postdose levels. The relevant pharmacokinetic parameters were calculated after noncompartmental pharmacokinetic analysis using Kinetica software (Thermo Scientific, ver.5.0). Results: Although basal plasma Epo concentration was similar in BEN (20.1±10.3U/L) and non-BEN (15.1±8.1U/L; p=.1964) patients, there were significant differences between the groups for elimination rate constant (0.016±0.006 vs 0.026±0.011 hr-1; p=.020) and elimination half-life (50.24±19.12 vs 33.79±18.91 hr, p=.048). These differences remained significant after adjustment for patient characteristics (age, sex, hemodialysis duration, ferritin, PTH and ACEI use). No significant differences between groups were found in maximal Epo concentration, time to maximum Epo concentration, area under the curve from time of dosing extrapolated to infinity, clearance, mean residence time of Epo between groups both before and after adjustment. Conclusion: Pharmacokinetic analysis of beta-erythropoietin detected a significantly longer elimination half-life in BEN than in non BEN patients. This finding needs to be confirmed in a well-controlled study with a larger sample size.

Keywords:
Pharmacokinetics
Keywords:
Human recombinant erythropoietin
Keywords:
Balkan endemic nephropathy
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