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Inicio Enfermedades Infecciosas y Microbiología Clínica Darunavir en primeras líneas. Estudio TITAN
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Vol. 26. Issue S10.
Darunavir
Pages 14-22 (October 2008)
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Vol. 26. Issue S10.
Darunavir
Pages 14-22 (October 2008)
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Darunavir en primeras líneas. Estudio TITAN
Darunavir in first-live therapy. The TITAN study
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Adrian Curran, Esteve Ribera Pascuet
Corresponding author
eribera@vhebron.net

Correspondencia: Servicio de Enfermedades Infecciosas. Hospital Universitario Vall d’Hebron. Paseo Vall d’Hebron, 119-129. 08035 Barcelona. España.
Servicio de Enfermedades Infecciosas. Hospital Universitario Vall d’Hebron. Barcelona. España
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Durante muchos años lopinavir/ritonavir (LPV/r) ha sido el estándar de oro del tratamiento de las primeras líneas de rescate. Ninguno de los otros inhibidores de la proteasa potenciados (IP/r) había logrado demostrar superioridad frente a LPV/r. En este escenario, el estudio TITAN comparó en 595 pacientes la eficacia y seguridad de darunavir (DRV)/r a dosis de 600/100 mg 2 veces al día frente a la dosis habitual de LPV/r, asociados al menos a otros 2 antirretrovirales optimizados. La eficacia del tratamiento a las 48 semanas (carga viral < 400 copias/ml) resultó significativamente superior en el grupo de DRV/r que en el de LPV/r, tanto en el análisis por protocolo (el 77 frente al 68%), demostrándose la no inferioridad de DRV/r (diferencia estimada +9%; intervalo de confianza [IC] del 95%, 2-16%), como por intención de tratamiento (el 77 frente al 67%), demostrándose la superioridad de DRV/r (diferencia estimada del 10%; IC del 95%, 2-17%). La incidencia de diarrea y el aumento de triglicéridos fueron superiores en el grupo de LPV/r. Las diferencias en la eficacia de ambos tratamientos a favor de DRV/r empezaron a observarse a partir de una mutación primaria basal en la proteasa y se incrementaron a medida que aumentó el número de dichas mutaciones. En los pacientes con fallo virológico, DRV/r protegió a la proteasa y a la transcriptasa inversa frente a la aparición de mutaciones, preservando futuras opciones terapéuticas. Se dispone de algunos datos teóricos y clínicos que nos permiten pensar en la posibilidad de administrar DRV/r 1 vez al día en algunos pacientes con pocas mutaciones en la proteasa y en los que se considere importante esta posología. Con los resultados del estudio TITAN, DRV/r debe considerarse el nuevo estándar de oro en las primeras líneas de rescate, al menos en los pacientes con alguna mutación primaria en la proteasa.

Palabras clave:
Darunavir
Tratamiento de rescate
Estudio TITAN
Mutaciones en la proteasa
Infección por el VIH
Tratamiento antirretroviral

Lopinavir/ritonavir (LPV/r) has been the gold standard in first line rescue treatment for many years. No other boosted protease inhibitor (PI/r) has managed to demonstrate that it is superior to LPV/r. In this regard, the TITAN study compared the efficacy and safety of darunavir (DRV/r) in 595 patients, at a dose of 600/100 mg two times a day against the normal LPV/r dose, combined with at least 2 other optimised antiretroviral drugs. The efficacy of the treatment at 48 weeks (VL<400 copies/mL) was significantly higher in the DRV/r goup compared to the LPV/r group, both in the analysis by protocol (77% vs. 68%), the non-inferiority of DRV/r being demonstrated (estimated difference +9%, 95% CI 2-16), and by intention to treat (77% vs. 67%), the superiority of DRV/r being demonstrated (estimated difference 10%, 95% CI 2-17%). The incidence of diarrhoea and increase in triglycerides was higher in the LPV/r group. The differences in efficacy of both treatments in favour of DRV/r started to be seen from a basal primary mutation in the protease, with these differences increasing as the number of these mutations increased. In patients with virological failure, DRV/r protected the protease and reverse transcriptase against mutations, thus preserving future therapeutic options. We have some theoretical and clinical data available that enables us to consider the possibility of administering DRV/r once a day in some patients with a few mutations in the protease and in those where this dosing regime is considered important. With the results of the TITAN study, DRV/r must be considered the new gold standard in first line rescue, at least in those patients with a primary mutation in the protease.

Key words:
Darunavir
Rescue treatment
TITAN study
Mutations in the protease
HIV infection
Anti-retroviral treatment
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Copyright © 2008. Elsevier España S.L.. Todos los derechos reservados
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