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Dipyrithione (PTS2) possesses anti-bacterial and anti-fungal activity. In the present study, we found that PTS2 dose-dependently inhibited the LPS-induced up-regulation of nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) protein level in RAW264.7 cells. RT-PCR experiments showed that PTS2 suppressed LPS-induced iNOS but not COX-2 expression at the mRNA level. As expected, PTS2 prevented NO...
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