Il. Kozyrev et al., Construction of SIV/HIV-1 chimeric viruses having the IL-5 gene and determination of their ability to replicate and produce IL-5, ARCH VIROL, 146(6), 2001, pp. 1051-1062
During the progression of AIDS, there is a shift in abundance of immune cel
ls from Th1-producing cells to Th2-producing cells. To determine whether th
in change might have an effect on HIV-1 replication in vivo, we constructed
simian/human immunodeficiency chimeric viruses having the human IL-5 gene
(a Th2-type cytokine) and examined the effect of the inserted gene on viral
replication, IL-5 production and viral stability in vitro. The DNA of huma
n IL-5 was inserted into vpr-deleted and nef-deleted infectious SHIVs. The
obtained replication-competent viruses were used to infect human T-cell lin
es and monkey peripheral blood mononuclear cells. As a result, at the time
of peak NI-ILS virus production, IL-5 was produced with a significantly hig
her titer than 3sj-IL5. The functionality of the produced IL-5 was confirme
d by IL-5-dependent cells. The replication of both SHIVs having IL-5 appear
ed to be faster than that of the parental viruses without the IL-5 gene. Th
ese results show that co-expression of IL-5 stimulates SHIV replication in
vitro. Thus, it is expected that expression of IL-5 will also have an effec
t on viral replication and pathogenicity in vivo.