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Anti-mycobacterial activity of quinolones: triazoloquinolones a new class of potent anti mycobacterial agents

Carta, Antonio and Piras, Sandra and Palomba, Michele Francesco Luigi and Jabes, Daniela and Molicotti, Paola and Zanetti, Stefania Anna Lucia (2008) Anti-mycobacterial activity of quinolones: triazoloquinolones a new class of potent anti mycobacterial agents. Anti-Infective Agents in Medicinal Chemistry, Vol. 7 (2), p. 134-147. ISSN 1871-5214. Article.

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A number of novel quinolone derivatives have been recentlyreported to posses in vitro and in vivo anti mycobacterial and DNA gyrase inhibition activities. It is known that mycobacteria expressing resistance to both isoniazid and rifampin (multi-drug resistant, MDR) is sensible to fluoroquinolones. Ciprofloxacin,oxfloxacin, moxifloxacin and levofloxacin are increasingly used for the treatment of tuberculosis, because they inhibit thetopoisomerases II (DNA gyrases) and IV, essential enzymes to maintain the supercoils in bacterial DNA. It has been demonstrated that complex mutations in DNA gyrase GyrA2 GyrB2 associated with quinolone resistance or hypersusceptibility take place in several MDR clinical isolates of M. tuberculosis. In this article we report the anti mycobacterial properties, mode of action and structure activity relationship (SAR) studies of the known quinolone derivatives. Furthermore, we report the synthesis and activity of 3,9 disubstituted-6-oxo-6,9-dihydro-3H-[1,2,3]triazolo[4,5-h]quinolone carboxylic acids and their esters as a new class of potent anti mycobacterial agents. The triazoloquinolone derivatives are particularly interesting for their activity against MDR M. tuberculosis.

Item Type:Article
ID Code:2852
Uncontrolled Keywords:Quinolone derivatives, anti-mycobacterial activities, M. tubercolosis
Subjects:Area 06 - Scienze mediche > MED/07 Microbiologia e microbiologia clinica
Area 03 - Scienze chimiche > CHIM/08 Chimica farmaceutica
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
001 Università di Sassari > 01 Dipartimenti > Farmaco, chimico, tossicologico
Publisher:Bentham Science Publishers
Deposited On:27 Aug 2009 12:19

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