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Session 125  Poster Abstracts
Clinical Pharmacology of Reverse Transcriptase Inhibitors
Tuesday, 1-4 pm
Room: Hall A
      754 Compartmental Kinetics of Intracellular Tenofovir
Courtney Fletcher*1, T King1, L Bushman1, J Kiser1, P Anderson1, J Brenchley2, D Douek2, and T Schacker3
1Univ of Colorado Hlth Sci Ctr, Denver, US; 2NIAID, NIH, Bethesda, MD, US; and 3Univ of Minnesota, Minneapolis, US
      755 Intracellular Accumulation of Tenofovir and Emtricitabine in vitro Highlight the Inhibitor Role of Efavirenz for Multridrug Resistance-Associated Protein 1, MRP1
Laurence Bousquet*1, A Pruvost1, N Didier1, R Farinotti2, and A Mabondzo1
1CEA, iBiTecS, Gif sur Yvette, France and 2Univ Paris Sud XI, Chatenay-Malabry, France
      756

Positron Emission Tomography Agent for Non-invasive Imaging of Antiretroviral Drug Penetration and Kinetics in vivo
Michele Di Mascio*1, S Srinivasula2, M Collins3, E Lim4, L Cheng1, and D Kiesewetter5
1NIAID, NIH, Bethesda, MD, US; 2SAIC-Frederick, MD, US; 3Bioqual Inc, Rockville, MD, US; 4Univ of Pennsylvania, Philadelphia, US; and 5Natl Inst of Biomed Imaging and BioEngineering, NIH, Bethesda, MD,US
      757

Comparison of Package-insert Recommendations for Renal Dosing and Prescribed Dosing of Products Containing Tenofovir: The VA Experience
Barbara Phillips*, P Belperio, L Mole, and V Katseva
Ctr for Quality Mgmt in Publ Hlth, Veterans Hlth Admin, Palo Alto, CA, US
      758

Pharmacological Mechanisms Leading to Early Virologic Failure of 2 Antiretroviral Regimens: Didanosine, Lamivudine, and Tenofovir, and Abacavir, Lamivudine, and Tenofovir
Lucun Bi*1, J Russell1, N Mordwinkin1, J Lam2, and S Louie1
1Univ of Southern California Sch of Pharmacy, Los Angeles, US and 2Loma Linda Univ Sch of Pharmacy, CA, US
      759

Pharmacogenetics of Plasma Drug Exposure and Treatment Outcomes with Efavirenz-containing Regimens: An ACTG Study
David Haas*1, H Ribaudo2, A Motsinger3, B Schackman4, R Gulick4, E Acosta5, M Schwab6, E Schaeffeler6, G Morse7, G Robbins8, and The AIDS Clinical Trials Group
1Vanderbilt Univ, Nashville, TN, US; 2Statistical and Data Analysis Ctr, Harvard Sch of Publ Hlth, Boston, MA, US; 3North Carolina State Univ, Raleigh, US; 4Weill Med Coll of Cornell Univ, New York, NY, US; 5Univ of Alabama at Birmingham, US; 6Margarete Fischer-Bosch Inst for Clinical Pharma, Stuttgart, Germany; 7State Univ of New York at Buffalo, US; and 8Harvard Univ, Boston, MA, US
      760

Pharmacokinetics of Nevirapine and Rifampicin in TB/HIV Co-infected Patients in Burkina Faso
Alberto Matteelli*1, N Saleri1,3, M Regazzi2, P Villani2, V Bonkoungou3, J Simpore3, A Carvalho1, M Cusato2, G Carosi1, and M Dembele3
1Inst of Infectious and Tropical Diseases, Univ of Brescia, Italy; 2Inst of Pharmacology, IRCCS, San Matteo, Pavia, Italy; and 3Natl TB Prgm, Ministry of Hlth, Burkina Faso
      761

Efavirenz Induces CYP450 2B6 Activity as Measured by Bupropion Hydroxylation in Healthy Subjects
Sarah Robertson*1, F Maldarelli2, V Natarajan3, E Formentini4, R Alfaro5, and S Penzak5
1US Food and Drug Admin, Silver Spring, MD, US; 2NCI, Bethesda, MD, US; 3SAIC-Frederick, MD, US; 4NIH, Bethesda, MD, US; and 5Clinical Res Ctr, NIH, Bethesda, MD, US
      762

Pharmacokinetics and Pharmacodynamics of the NNRTI TMC125 in Treatment-experienced HIV-1-infected Patients: Pooled 24-week Results of DUET-1 and DUET-2
Thomas Kakuda*1, J Wade2, E Snoeck2, M Peeters3, C Corbett3, G De Smedt3, L Leopold1, J Vingerhoets3, B Woodfall3, and R Hoetelmans3
1Tibotec, Inc, Yardley, PA, US; 2Exprimo NV, Mechelen, Belgium; and 3Tibotec BVBA, Mechelen, Belgium
      763

Pharmacokinetic Interaction of the Next Generation NNRTI UK-453,061 with Other Antiretrovirals and Assessment of Safety and Tolerability in Healthy Male Subjects
G Langdon1, J Davis1, G Layton1, H Choo2, M N Ndongo3, A Milton4, and Manoli Vourvahis*4
1Pfizer Global R&D, Sandwich, UK; 2Pfizer Res Clin, Singapore Gen Hosp; 3Pfizer Res Clin, Erasme, Brussels, Belgium; and 4Pfizer Global R&D, New London, CT, US
      764

Dose-escalation Safety, Tolerability, and Pharmacokinetics of a Novel HIV-1 NNRTI [IDX899] in Healthy Subjects
Douglas Mayers*, M Hard, D Damphousse, B Fielman, J Sullivan-Bolyai, B Belanger, and X J Zhou
Idenix Pharma, Inc, Cambridge, MA, US