J. Demareuil et al., RESTRICTION OF HIV-1 REPLICATION IN INTESTINAL-CELLS IS GENETICALLY CONTROLLED BY THE GAG-POL REGION OF THE HIV-1 GENOME, Virology, 207(1), 1995, pp. 160-167
The human colon epithelial line HT29 represents a semipermisive cellul
ar system for human immunodeficiency virus type 1 (HIV-1). It could be
productively infected with HIV-1 NDK, a Zairian virus isolate highly
cytopathic for CD4 positive lymphocytes, whereas infection with the pr
ototype virus HIV-1 LAV was nonproductive. Recombinant viruses derived
from HIV-1 LAV and HIV-1 NDK were used to determine the genetic contr
ol, step of virus/cell cycle, and molecular mechanism responsible for
productive versus nonproductive infection of intestinal cells. Both pa
rental viruses and all recombinants retrotranscribed their genomes wit
h a similar kinetics and were able to complete HIV-1 DNA synthesis. HI
V-1 LAV provirus present in preintegration complexes could be rescued
by cocultivation with T-lymphocytes. However, it was aborted during pr
olonged cultivation of HT29 cells. Our results suggest that (i) gag/po
l region of HIV-1 genome (fragment BssHII(255)- EcoRI(4183)) genetical
ly controlled productive infection of intestinal cells and that (ii) t
he difference between productive and abortive infection occurred befor
e synthesis of HIV-1 mRNA, at the integration level. (C) 1995 academic
Press, Inc.