[Show abstract][Hide abstract] ABSTRACT: Mitoxantrone is an anthracene-based anticancer agent whose efficacy in treating autoimmune diseases is believed to be due to cytotoxicity and inhibition of proliferation of cells. Several novel anthraquinone derivatives, analogues of mitoxantrone, were designed and synthesized. Lipophilic and functionalized mitoxantrone analogues were prepared by a simple methodology and the cytotoxicity and the inhibitory effect on nitric oxide release of these compounds were demonstrated in vitro on J774A.1 macrophages. Interestingly compounds 3, 4, 5, 6, 7, and 8 exhibited reduction in NO release (62.4%, 92.6%, 73.4%, 58.4%, 57.8% and 53.4%, respectively) in comparison to NG-n-methyl-arginine treated control, without cytotoxicity. In conclusion, anthraquinone derivatives were prepared in a good yields and showed promissory anti-inflammatory properties.
[Show abstract][Hide abstract] ABSTRACT: In this work, 17 new N-acylhydrazone derivatives of amino acids have been evaluated for their in vitro antibacterial activity against Mycobacterium tuberculosis H37Rv. The compounds 8b, 8e, 8f, 9a-d, and 10c exhibited an important minimum inhibitory concentration activity between 12.5 and 50 μg/mL, which can be compared with that of the tuberculostatic drug d-cycloserine (20 μg/mL).
Chemical Biology & Drug Design 11/2011; 79(2):216-22. · 2.47 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: In this work, a number of lipidic amino alcohols wereas synthesized and evaluated in vitro on cultures of Leishmania amazonensis and Leishmania chagasi. Nine amino alcohols showed inhibition of L. chagasi growth, and seven of them showed inhibition of L. amazonensis with IC(50) below 10 microm. Compound 11f was more active than the reference drug amphotericin B against L. chagasi promastigote forms.
Chemical Biology & Drug Design 12/2009; 75(2):233-5. · 2.47 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: A series of diamines and amino alcohols derived from 1-dodecanol, 1-tetradecanol, 1,2-dodecanediol and 1,2-tetradecanediol were synthesized and tested for their antitubercular activity. Compounds 3, 8 and 9 were found to be the most active (MIC of 6.25 microg/mL). Nine other compounds displayed activity against Mycobacterium tuberculosis, with a MIC of 12.5 microg/mL.
Memórias do Instituto Oswaldo Cruz 08/2009; 104(5):703-5. · 1.36 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: We report in this work the preparation and the in vitro antileishmanial activity of a series of long chains N-monoalkylated diamines and two pyridinediamine derivatives. Several compounds, tested for their in vitro antiproliferative activity against Leishmania amazonensis and Leishmania chagasi, displayed a good inhibition of parasite growth, with IC(50) below 10 microM. Compounds 10 (N-dodecyl-1,2-ethanediamine), 15 (N-decyl-1,3-propanediamine) and 20 (N-dodecyl-1,4-butanediamine) were 7.3, 2.6 and 3.6 times, respectively, more active than the reference drug amphotericin B against L. chagasi promastigote forms.
[Show abstract][Hide abstract] ABSTRACT: Fluoroquinolone (FQ) has a broad spectrum of activity against several bacteria, mycobacteria, parasites, and other diseases. Moxifloxacin and gatifloxacin are a new generation of fluoroquinolone agents with improved activity against Gram-negative and positive bacteria. As lipophilicity is an important consideration in the design and activity of novel antibacterial agents, we report in this work the synthesis and biological evaluation of 12 lipophilic moxifloxacin or gatifloxacin derivatives, by reaction of 1-cyclopropyl-6,7-difluoro-1,4-dihydro-8-methoxy-4-oxoquinoline-3-carboxylic acid 13 with several N-monoalkyl 1,2-ethanediamine or 1,3-propanediamine.