PURPOSE:
Foot-and-mouth disease (FMD) is an economically important global
animal disease. To control FMD
virus (FMDV)
outbreaks, a lot of different novel approaches have been attempted. In this study, we proposed a novel
porcine reproductive and respiratory syndrome virus (
PRRSV) as a
replicon vector to express FMDV structural
protein. MATERIALS AND
METHODS:
PRRSV infectious
clone (PRRSVK418DM) was used to develop an expression vector through the reverse genetic manipulation of
PRRSV; FMDVP12A3C
gene of
serotype O was synthesized and used for an
antigen. MARC-145
cells (
African green monkey kidney epithelial cell line) were used for
electroporation mediated
transfection. The
transfection or the expression of P12A3C and N
protein of
PRRSV was analyzed by either
replicon containing
PRRSV alone or by
co-infection of helper
PRRSV.
RESULTS:
We constructed PRRSVK418DM
replicon vector containing FMDVP12A3C, and
genome sequences were confirmed by subsequent
sequence analysis.
In vitro expression of P12A3C and
PRRSV N
protein was confirmed by
immunofluorescence antibody assay using
antibodies specific for
PRRSV N
protein (anti-
PRRSV N MAb), FMDV-VP1 (anti-VP1 MAb).
CONCLUSION:
The results indicate that
PRRSV replicon vector can be a promising novel vector system to control FMDV and useful for
vaccine development in the
future.