522 Impact of MDR1 (C3435T) Genetic Polymorphism in Patients Naïve Treated with HAART including Indinavir C. Verstuyft1, F. Marcellin2, L. Morand-Joubert*1, O. Launay3, G. Peytavin3, L. Gerard2, L. Becquemont1, J. P. Aboulker2 1St Antoine Hosp, Paris, France; 2INSERM SC10, Villejuif, France; and 3Bichat-Claude Bernard Hosp, Paris, France