Jpn J Cancer Res. 1997 Feb;88(2):137-42. Unique Identifier : AIDSLINE
Attempts were made to generate a rabbit model of dual infection with
human T lymphotropic virus (HTLV) types I and II. Four groups (A, B, C,
and D) of three rabbits each were used. Group A was inoculated with the
RW-1 cell line coinfected with HTLV-I and HTLV-II and group B was
transfused from a dually infected rabbit. Polymerase chain reaction
(PCR) using primers specific for the pol region of each virus detected
both HTLV-I and HTLV-II in all group A and two group B rabbits, but
HTLV-II only in the remaining group B rabbit. Groups C and D already
infected with HTLV-I and HTLV-II, respectively, were inoculated with an
HTLV-II- or HTLV-I-producing cell line. One group C rabbit became
PCR-positive for both viruses but the other five resisted superinfection
with the respective viruses. During prolonged observation, three of the
six dually infected rabbits converted to single (HTLV-I or HTLV-II)
infection. The in vivo dual infection was confirmed by in vitro
establishment of a lymphoid cell line coinfected with HTLV-I and
HTLV-II. It was also possible to establish coinfected lymphoid cell
lines from HTLV-I-infected rabbits by coculture with lethally irradiated
HTLV-II-producing cells and vice versa. The mechanism of viral
elimination in dually infected rabbits, as well as that of protective
immunity against superinfection, remains to be elucidated.
*Disease Models, Animal *HTLV-I Infections/TRANSMISSION *HTLV-II
Infections/TRANSMISSION *Superinfection/TRANSMISSION