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Fig. 1. Synthesis and intracellular retention of IFN
. (A) WISH cells,
untreated (lanes 1 and 2) or those transduced for two days with an empty
vector control (lanes 3 and 4) or a vector expressing non-secreted IFN
(lanes 5 and 6) or a vector expressing non-secreted IFN
mutated in the
NLS (lanes 7 and 8) were used. Proteins from cell extracts (odd-numbered
lanes) or supernatants (even-numbered lanes) were separated by SDS-PAGE and
probed with an antibody to IFN
. Detection was carried out by using
chemiluminescence. (B) Quantitation of IFN
produced in L929 cells by
ELISA. Cell extracts (odd numbers) and supernatants (even numbers) from L929
cells, transduced for two days with the empty adenoviral vector (column 1 and
2) or vector expressing non-secreted IFN
(column 3 and 4) or vector
expressing non-secreted IFN
mutated in the NLS (column 5 and 6) were
assayed for IFN
by ELISA.