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European Journal of Medical Research - Deutsche AIDS ...

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June 27, 2007 EUROPEAN JOURNAL OF MEDICAL RESEARCH<br />

107<br />

observation are meanwhile sufficient for an evaluation on the<br />

potential delay <strong>of</strong> the first HAART start.<br />

Methods: All therapy naïve HIV-patients who came to us in<br />

the 4 years from 1999-2002 and remained HAART-naïve at<br />

least 6 months, either with or without 5mg Prednisolone daily,<br />

were included. 46 took Prednisolone, 45 did not. 20 <strong>of</strong> the latter<br />

started to take Prednisolone later. Thus 25 remained as the<br />

evaluable control group. Times to start <strong>of</strong> HAART or death<br />

were analyzed using Kaplan-Meier estimates and compared<br />

by the logrank test.<br />

Results: Mean CD4-baseline-counts were similar in the Prednisolone<br />

and the control group (554/l resp. 564/l, p=0.83).<br />

5 patients were lost in the Prednisolone group, 6 in the control<br />

group, during follow-up. One patient <strong>of</strong> the control group died<br />

<strong>of</strong> a heroin overdose. The cumulated rate <strong>of</strong> patients surviving<br />

3 years without HAART was 62% in the Prednisolone group<br />

compared to 29% in the control group (logrank, p=0.032).<br />

>50% <strong>of</strong> the Prednisolone group were on HAART after 3.5<br />

years, <strong>of</strong> the control group after 1.5 years. Estimated overall<br />

median observation time was about 4.9 years (reverse Kaplan-<br />

Meier).<br />

Conclusion: The results are very preliminary, based on a<br />

monocentric observation <strong>of</strong> cohorts from clinical routine practice.<br />

There were no standardized HAART-initiation criteria<br />

and no ordinary methodical minimization <strong>of</strong> possible bias.<br />

The number <strong>of</strong> evaluated patients is small, especially in the<br />

control group. Otherwise, there is a sound difference. Time to<br />

HAART initiation is more than doubled, a result corresponding<br />

to the better time dependent CD4-pr<strong>of</strong>ile <strong>of</strong> the Prednisolone-treated<br />

patients. It seems probable that Prednisolone<br />

is appropriate to extend the time prior to the start <strong>of</strong> HAART.<br />

D.71 (Poster)<br />

Pharmakokinetik der Lopinavir/r-<br />

Meltrexformulierung im Vergleich zur<br />

Lopinavir/r-Weichkapsel<br />

Leyh M. 1 , Winzer R. 1 , Heinz W. 1 , Guhl C. 1 , Klinker H. 1 ,<br />

Langmann P. 2<br />

1 Medizinische Klinik und Poliklinik II der Universität<br />

Würzburg, Schwerpunkt Infekiologie, Würzburg, Germany,<br />

2 Praxis für Gastroenterologie und Infektiologie, Karlstadt,<br />

Germany<br />

Hintergrund: Der Protease-Inhibitor Lopinavir (LPV) erreicht<br />

in der Kombination mit Ritonavir (r) sichere therapeutische<br />

Plasmaspiegel (PS). Die ursprüngliche Formulierung<br />

von LPV/r war eine Weich-Gelatine-Kapsel (SGC) in einer<br />

Dosierung von 2x3 a 133/33mg zu den Mahlzeiten. Seit Juni<br />

2006 ist die LPV/r Fixkombination als Tabl. zugelassen und<br />

ersetzt die SGC. Die Dosierung der mittels Melt-Extrusion<br />

Technik hergestellten Tabl. beträgt 2x2 a 200/50mg.<br />

Fragestellung: Da sich LPV/r-SGC und –Tabl. sowohl in<br />

Darreichungsform als auch im Einnahmemodus und der empfohlenen<br />

Lagerung unterscheiden, wurde prospektiv untersucht,<br />

ob sich Unterschiede in der Pharmakokinetik bezüglich<br />

der beiden Formulierungen zeigen.<br />

Methodik: Bei 14 konsekutiven Patienten unter LPV/r –Therapie<br />

wurden vor und nach der Therapieumstellung von SGC<br />

auf die Tabl. insgesamt 123 LPV-PS zu den Zeitpunkten 0h,<br />

3h, 6h und 9h (±15min) nach Einnahme mittels HPLC bestimmt.<br />

Zusätzlich dazu wurde eine retrospektive Untersuchung<br />

der 3h- und 0h- LPV-PS von insgesamt 366 Plasmasproben<br />

(174 Patienten) vorgenommen. Hiervon waren<br />

unter SGC 115 Talspiegel von 87 Patienten (Zeitpunkt 0h)<br />

und 190 PS von 87 Patienten zum Zeitpunkt 3h nach Einnahme.<br />

Unter LPV/r-Tabletten-Therapie waren 33 PS von 25<br />

Patienten zum Zeitpunkt 0h, und 28 PS von 27 Patienten zum<br />

Zeitpunkt 3h. Die Datenanalyse erfolge mittels Mann-Whitney<br />

Test.<br />

Ergebnisse: Die prospektiven Untersuchung (SCG./.Tabl.)<br />

von 14 Patienten ergab zu allen 4 Zeitpunkten keinen signifikanten<br />

Unterschied der LPV-PS-Mediane (0h: 4754<br />

ng/ml./.4878ng/ml, p=0,99; 3h: 9180ng/ml./.8428ng/ml, p =<br />

0,89; 6h: 7556 ng/ml./.6425ng/ml, p = 0,91; 9h: 5624<br />

ng/ml./.5603ng/ml, p = 0,82). In der retrospektiven Untersuchung<br />

(SCG./.Tabl.) von 174 Patienten ergaben sich keine<br />

Unterschiede bezüglich der LPV-PS-Mediane zum Zeitpunkt<br />

0h (5087ng/ml./.4998ng/ml, p = 0,73), jedoch fanden sich signifikant<br />

höhere LPV-PS zum Zeitpunkt 3h (7842<br />

ng/ml./.10264 ng/ml, p=0,0002).<br />

Diskussion: Trotz Reduktion der „Pillenlast“ sowie verändertem<br />

Einnahmemodus und Lagerungsbedingungen können<br />

mit der neuen LPV/r-Formulierung gleichwertige, während<br />

der 3h-Spitzenspiegel sogar höhere Plasmaspiegel erreicht<br />

werden im Vergleich zur etablierten LPV/r-SGC.<br />

D.72 (Poster)<br />

Amprenavir (APV) and Atazanavir (ATV)<br />

pharmacokinetics: Therapeutic drug monitoring<br />

(TDM) <strong>of</strong> double-PI therapy (APV/ATV/r) in<br />

clinical practice<br />

Winzer R. 1 , Heinz W. 1 , Guhl C. 1 , Schirmer D. 1 , Leyh M. 1 ,<br />

Klinker H. 1 , Langmann P. 2<br />

1 Medizinische Klinik und Poliklinik II der Universität<br />

Würzburg, Schwerpunkt Infekiologie, Würzburg, Germany,<br />

2 Praxis für Gastroenterologie und Infektiologie, Karlstadt,<br />

Germany<br />

Objective: The pharmacological interaction <strong>of</strong> the combination<br />

<strong>of</strong> amprenavir (APV) with Atazanavir (ATV) may be<br />

helpful to achieve positive effects on drug levels because <strong>of</strong><br />

the inhibitory effect <strong>of</strong> APV on the CYP-System. The aim <strong>of</strong><br />

the present study was to analyse the drug levels <strong>of</strong> a<br />

APV/ATV/r double-PI regiment during clinical practice.<br />

Methods: APV and ATV drug levels <strong>of</strong> 39 patients (m/f:<br />

30/9) on FAPV (fosamprenavir)/ATV/r ± optimised backbone<br />

were determined with a HPLC-based method at their regular<br />

outpatient visits over a total period <strong>of</strong> 40 months.<br />

Results: Under a recommended dosis (FAPV: 1400 mg/d,<br />

ATV: 300 mg/d, RTV: 200 mg/d), 364 samples <strong>of</strong> 39 patients<br />

could be determined. 32 samples were excluded because <strong>of</strong><br />

incomplete data. APV trough levels were 4.211±3.510 ng/ml.<br />

APV peak levels (5.840±2.410 ng/ml) were reached between<br />

3-6 h. 6 drug levels were under the lower recommended level<br />

for Cthrough (400 ng/ml). ATV trough levels were<br />

1.423±1.049 ng/ml. ATV peak levels (2.068±1.271 ng/ml)<br />

were also reached between 3-6 h. 16 ATV drug levels were<br />

below the lower recommended level for Cthrough (150<br />

ng/ml). Mean treatment-time was 8,2 ± 8,6 months.<br />

Conclusion: During the combination <strong>of</strong> ATV and APV, the<br />

drug levels <strong>of</strong> ATV and APV reached are stable over a longterm<br />

treatment period. Despite <strong>of</strong> the variance <strong>of</strong> APV/ATV<br />

trough levels, the attended high levels in the salvage situation<br />

will be reached in most patients. This treatment should be<br />

controlled by therapeutic drug monitoring.

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