Abstract
Abstract: Background: Chlamydiae are widespread Gram-negative bacteria that cause a number of human diseases. Chlamydia trachomatis is the most prevalent sexually transmitted bacterial pathogen. </P><P> Methods: Fourteen novel phenazine derivatives were efficiently synthesized via Buchwald-Hartwig cross coupling reaction and Suzuki reaction from 4-bromo-1-methoxyphenazine. All the derivatives displayed antichlamydial activity with IC50 values from 1.01-19.77 &#181;M against Chlamydia trachomatis D and L2 for inhibiting progeny formation.Results:C-4 morpholinyl 8a and C-4 phenyl phenazine 9c exhibited stronger antichlamydial activity with no apparent cytotoxicity. Both phenazine derivatives inhibited chlamydial inclusions formation and growth in a dose-dependent manner. They inhibited Chlamydia infection by reducing elementary body infectivity and disturbing Chlamydia growth at the mid-stage of the chlamydial developmental cycle.Conclusion:Our findings suggest C-4 aryl and C-4 amino phenazine derivatives as promising lead molecules for antichlamydials development.
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