The nitroimidazooxazines (PA-824 and analogs): structure-activity relationship and mechanistic studies.

Abstract:

:PA-824 is an experimental anti-tubercular agent that has a novel mechanism of action. It is effective against both active and persistent forms of the disease and has recently shown early bactericidal activity in a Phase II clinical trial. This review summarizes recent studies on the mode of action of PA-824 and outlines successful efforts to prepare more effective second-generation analogs. PA-824 displays unusual chemistry following both enzymatic and radiolytic reduction, which is clearly related to its activity as an anti-tubercular agent. The nitroreductase enzyme deazaflavin-dependent nitroreductase, reduces PA-824 with loss of the nitro group, generating reactive nitrogen species such as nitric oxide, which appear important in mediating the activity of the drug. Bioreductive drugs such as PA-824 hold the promise of shorter treatment regimens.

journal_name

Future Med Chem

authors

Denny WA,Palmer BD

doi

10.4155/fmc.10.207

subject

Has Abstract

pub_date

2010-08-01 00:00:00

pages

1295-304

issue

8

eissn

1756-8919

issn

1756-8927

journal_volume

2

pub_type

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