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Evolution of the absorption profile of cyclosporine A in renal transplant recipients: a longitudinal study of the de novo and maintenance phases

Identifieur interne : 009996 ( Main/Exploration ); précédent : 009995; suivant : 009997

Evolution of the absorption profile of cyclosporine A in renal transplant recipients: a longitudinal study of the de novo and maintenance phases

Auteurs : Matthias Bu Chler ; Steve Chadban ; Edward Cole ; Karsten Midtvedt ; Eric Thervet ; Hans Prestele [Suisse] ; Paul Keown [Canada]

Source :

RBID : ISTEX:5B276E4D1C60DD49B003B96C623017CA41E3D66E

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English descriptors

Abstract

Background. Therapeutic drug monitoring for cyclosporine microemulsion (CsA-ME) is often performed using either trough levels (C0) or levels at 2 h post-dose (C2). This analysis assessed changes in C0 and C2 and their relationship to CsA-ME dose over time post-transplant in renal transplant patients. Methods. Data were obtained from MO2ART, a prospective multicentre trial in which CsA-ME dose was adjusted based on C2 level. All 98 patients in whom C0 and C2 were available at day 5, month 3 and month 12 were included, out of 234 who completed the 12 month study. Normalized dose (ND) of CsA-ME, defined as dose per kilogram body weight, was calculated, together with C0/ND, C2/ND and C2/C0. Results. C0/ND and C2/ND both increased between day 5 and month 3: C0/ND from 33±15 to 53±24 (ng/ml)/(mg/kg) and C2/ND from 161±64 to 248±80 (ng/ml)/(mg/kg). Between month 3 and month 12, C2/ND remained stable but C0/ND decreased to 42±20 (ng/ml)/(mg/kg) while the C2/C0 ratio increased from 5.2±1.9 to 6.5±2.3, indicating an acceleration of drug elimination. The inter-individual coefficient of variation was higher for C0/ND than for C2/ND at 3 months (45 vs 32%, P<0.05) and at 12 months (48 vs 31%, P<0.01). Conclusions. CsA clearance accelerates between months 3 and 12 post-transplant, resulting in lower C0 levels for a given exposure (as measured by C2). As a consequence, C0 monitoring may progressively underestimate CsA exposure during the first year post-transplant. C2 monitoring contributes to improved individualized CsA-ME treatment in both the de novo phase and beyond month 3.

Url:
DOI: 10.1093/ndt/gfi113


Affiliations:


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<title level="j">Nephrology Dialysis Transplantation</title>
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<term>Absorption profile</term>
<term>Acute rejection</term>
<term>Aged</term>
<term>Allograft recipients</term>
<term>Baseline characteristics</term>
<term>Blood concentration</term>
<term>Blood levels</term>
<term>Blood samples</term>
<term>C2 monitoring</term>
<term>Central laboratory</term>
<term>Clinical immunology</term>
<term>Cyclosporine</term>
<term>Cyclosporine (pharmacokinetics)</term>
<term>Cyclosporine (therapeutic use)</term>
<term>Cyclosporine microemulsion</term>
<term>Dose-Response Relationship, Drug</term>
<term>Drug Administration Schedule</term>
<term>Drug Monitoring (methods)</term>
<term>Female</term>
<term>Follow-Up Studies</term>
<term>Graft Rejection</term>
<term>Graft Survival (drug effects)</term>
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<term>Immunosuppressive Agents (pharmacokinetics)</term>
<term>Immunosuppressive Agents (therapeutic use)</term>
<term>International neoral</term>
<term>Kidney Failure, Chronic (diagnosis)</term>
<term>Kidney Failure, Chronic (immunology)</term>
<term>Kidney Failure, Chronic (surgery)</term>
<term>Kidney Transplantation (immunology)</term>
<term>Kidney Transplantation (methods)</term>
<term>Kidney transplantation</term>
<term>Kilogram body weight</term>
<term>Longitudinal Studies</term>
<term>Male</term>
<term>Maximum Tolerated Dose</term>
<term>Microemulsion</term>
<term>Middle Aged</term>
<term>Mo2art</term>
<term>Mo2art study</term>
<term>Mycophenolate mofetil</term>
<term>Neoral</term>
<term>Nephrol dial transplant</term>
<term>Pharmacokinetic</term>
<term>Pharmacokinetic parameters</term>
<term>Probability</term>
<term>Prospective Studies</term>
<term>Renal</term>
<term>Renal transplant patients</term>
<term>Renal transplant recipients</term>
<term>Renal transplantation</term>
<term>Risk Assessment</term>
<term>Sensitivity and Specificity</term>
<term>Steroid</term>
<term>Target group</term>
<term>Therapeutic drug monitoring</term>
<term>Time Factors</term>
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<term>Transplant proc</term>
<term>Transplant recipients</term>
<term>Transplantation</term>
<term>Transplantation Immunology</term>
<term>Transplantation study group</term>
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<term>Wilcoxon rank</term>
<term>absorption</term>
<term>cyclosporine microemulsion</term>
<term>renal transplantation</term>
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<term>Adulte d'âge moyen</term>
<term>Calendrier d'administration des médicaments</term>
<term>Ciclosporine (pharmacocinétique)</term>
<term>Ciclosporine (usage thérapeutique)</term>
<term>Dose maximale tolérée</term>
<term>Défaillance rénale chronique ()</term>
<term>Défaillance rénale chronique (diagnostic)</term>
<term>Défaillance rénale chronique (immunologie)</term>
<term>Facteurs temps</term>
<term>Femelle</term>
<term>Humains</term>
<term>Immunologie en transplantation</term>
<term>Immunosuppresseurs (pharmacocinétique)</term>
<term>Immunosuppresseurs (usage thérapeutique)</term>
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<term>Probabilité</term>
<term>Rejet du greffon</term>
<term>Relation dose-effet des médicaments</term>
<term>Sensibilité et spécificité</term>
<term>Sujet âgé</term>
<term>Surveillance pharmacologique ()</term>
<term>Survie du greffon ()</term>
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<term>Transplantation rénale (immunologie)</term>
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<term>Études longitudinales</term>
<term>Études prospectives</term>
<term>Évaluation des risques</term>
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<term>Cyclosporine</term>
<term>Immunosuppressive Agents</term>
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<term>Immunosuppressive Agents</term>
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<term>Kidney Failure, Chronic</term>
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<term>Défaillance rénale chronique</term>
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<term>Transplantation rénale</term>
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<term>Kidney Failure, Chronic</term>
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<term>Immunosuppresseurs</term>
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<term>Absorption profile</term>
<term>Acute rejection</term>
<term>Aged</term>
<term>Allograft recipients</term>
<term>Baseline characteristics</term>
<term>Blood concentration</term>
<term>Blood levels</term>
<term>Blood samples</term>
<term>Central laboratory</term>
<term>Clinical immunology</term>
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<term>Drug Administration Schedule</term>
<term>Female</term>
<term>Follow-Up Studies</term>
<term>Graft Rejection</term>
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<term>International neoral</term>
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<term>Kilogram body weight</term>
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<term>Pharmacokinetic parameters</term>
<term>Probability</term>
<term>Prospective Studies</term>
<term>Renal</term>
<term>Renal transplant patients</term>
<term>Renal transplant recipients</term>
<term>Renal transplantation</term>
<term>Risk Assessment</term>
<term>Sensitivity and Specificity</term>
<term>Steroid</term>
<term>Target group</term>
<term>Therapeutic drug monitoring</term>
<term>Time Factors</term>
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<term>Transplant patients</term>
<term>Transplant proc</term>
<term>Transplant recipients</term>
<term>Transplantation</term>
<term>Transplantation Immunology</term>
<term>Transplantation study group</term>
<term>Trough levels</term>
<term>Wilcoxon rank</term>
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<term>Calendrier d'administration des médicaments</term>
<term>Dose maximale tolérée</term>
<term>Défaillance rénale chronique</term>
<term>Facteurs temps</term>
<term>Femelle</term>
<term>Humains</term>
<term>Immunologie en transplantation</term>
<term>Mâle</term>
<term>Probabilité</term>
<term>Rejet du greffon</term>
<term>Relation dose-effet des médicaments</term>
<term>Sensibilité et spécificité</term>
<term>Sujet âgé</term>
<term>Surveillance pharmacologique</term>
<term>Survie du greffon</term>
<term>Transplantation rénale</term>
<term>Études de suivi</term>
<term>Études longitudinales</term>
<term>Études prospectives</term>
<term>Évaluation des risques</term>
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<div type="abstract" xml:lang="en">Background. Therapeutic drug monitoring for cyclosporine microemulsion (CsA-ME) is often performed using either trough levels (C0) or levels at 2 h post-dose (C2). This analysis assessed changes in C0 and C2 and their relationship to CsA-ME dose over time post-transplant in renal transplant patients. Methods. Data were obtained from MO2ART, a prospective multicentre trial in which CsA-ME dose was adjusted based on C2 level. All 98 patients in whom C0 and C2 were available at day 5, month 3 and month 12 were included, out of 234 who completed the 12 month study. Normalized dose (ND) of CsA-ME, defined as dose per kilogram body weight, was calculated, together with C0/ND, C2/ND and C2/C0. Results. C0/ND and C2/ND both increased between day 5 and month 3: C0/ND from 33±15 to 53±24 (ng/ml)/(mg/kg) and C2/ND from 161±64 to 248±80 (ng/ml)/(mg/kg). Between month 3 and month 12, C2/ND remained stable but C0/ND decreased to 42±20 (ng/ml)/(mg/kg) while the C2/C0 ratio increased from 5.2±1.9 to 6.5±2.3, indicating an acceleration of drug elimination. The inter-individual coefficient of variation was higher for C0/ND than for C2/ND at 3 months (45 vs 32%, P<0.05) and at 12 months (48 vs 31%, P<0.01). Conclusions. CsA clearance accelerates between months 3 and 12 post-transplant, resulting in lower C0 levels for a given exposure (as measured by C2). As a consequence, C0 monitoring may progressively underestimate CsA exposure during the first year post-transplant. C2 monitoring contributes to improved individualized CsA-ME treatment in both the de novo phase and beyond month 3.</div>
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