Described herein are methods for preventing or treating a retroviral infection and/or for preventing, inhibiting or treating a disease caused by the retroviral infection. In certain aspects, the methods described herein include contacting a cell in need thereof with compound (I), wherein (II) means a pyridazine, a pyrimidine or a pyrazine group, R independently represent a hydrogen atom, a halogen atom or a group chosen among a –CN group, a hydroxyl group, a –COOR1 group, a (C1 -C3)fluoroalkyl group, a (C1 -C3)fluoroalkoxy group, a –NO2 group, a –NR1R2 group, a (C1-C4)alkoxy group, a phenoxy group and a (C1-C3)alkyl group, said alkyl being optionally mono-substituted by a hydroxyl group, n is 1, 2 or 3, n' is 1 or 2, R' is a hydrogen atom, a halogen atom or a group chosen among a (C1-C3)alkyl group,, a hydroxyl group, a –COOR1 group, a –NO2 group, a –NR1R2 group, a morpholinyl or a morpholino group, a N-methylpiperazinyl group, a (C1-C3)fluoroalkyl group, a (C1-C4)alkoxy group and a –CN group, Z is N or C, Y is N or C, X is N or C, W is N or C, T is N or C, U is N or C, to prevent or treat the retroviral infection and/or for preventing, inhibiting or treating a disease caused by the retroviral infection, wherein the retroviral infection is not HIV and the disease caused by the retroviral infection is not AIDS.L'invention concerne des méthodes pour prévenir ou traiter une infection rétrovirale et/ou pour prévenir, inhiber ou traiter une maladie causée par ladite infection rétrovirale. Dans certains des ses aspects, l'invention concerne des méthodes consistant à mettre en contact une cellule nécessitant un tel traitement, avec un composé de formule (I) dans laquelle (II) désigne une pyridazine, une pyrimidine ou un groupe pyrazine, R représente indépendamment un atome d'hydrogène, un atome d'halogène ou un groupe sélectionné parmi les groupes suivants: un groupe CN, un groupe hydroxyle, un groupe COOR1 , un groupe fluoroalkyle (C1 -C3), un groupe fluoroalcoxy (C1 -C3)
