As shown in Figure 6b, a presence of 50 μg/L of MPOCs did
not significantly affect the IL-6 protein level. It should be noted
that the optimized MPOC concentration used here (50 μg/L)
was lower than that used in the above transcription experiment.
In the presence of MPOCs, only the PNA
, not the
PNA
random
NFkB
, could suppress IL-6 production upon LPS/rmIFN-γ
stimulation in a dose dependent manner. The result agreed well
with the decreased Il6 mRNA level in the above experiment.
We conclude that the PNA
delivered into cells by MPOCs
can suppress the Il6 gene transcription, resulting in the
decreases in Il6 mRNA and IL-6 protein levels. It is likely that
the open-up of the actively transcribed Il6 gene under LPS/
rmIFN-γ stimulation should theoretically allow the access and
binding of the PNA
NFkB
NFκB
to this targeted gene. In addition, the
possibility of the 12 base long PNA
to bind to the open-up
Il6 gene, not to other genes in the chromatin, should also be
increased under the stimulated condition.
NFkB
26