Twenty-five compounds structurally related to clofazimine were tested for their ability to inhibit the growth of Mycobacterium leprae using the kinetic method of drug evaluation in the mouse foot pad model of leprosy. Seven of the phenazine derivatives displayed anti-M. leprae activity comparable to that of clofazimine when administered at a concentration of 0.01% (w/w) in the diet. Three of the compounds, B746, B4087, and B4101, were active when administered at 0.001% in the diet. At a dietary concentration of 0.0001%, B4087 and B4101 were slightly more active than clofazimine, while B746 was less active. In the kinetic method of drug evaluation, greater anti-M. leprae activity of phenazine derivatives was generally associated with greater pigmentation of abdominal fat. Of the compounds which did not cause pigmentation when fed at a concentration of 0.01% in the diet B4090 was the most active. This compound also inhibits the growth of a clofazimine-resistant M. smegmatis strain.
BT - International journal of leprosy and other mycobacterial diseases : official organ of the International Leprosy Association C1 - http://www.ncbi.nlm.nih.gov/pubmed/8228439?dopt=Abstract DA - 1993 Sep IS - 3 J2 - Int. J. Lepr. Other Mycobact. Dis. LA - eng N2 -Twenty-five compounds structurally related to clofazimine were tested for their ability to inhibit the growth of Mycobacterium leprae using the kinetic method of drug evaluation in the mouse foot pad model of leprosy. Seven of the phenazine derivatives displayed anti-M. leprae activity comparable to that of clofazimine when administered at a concentration of 0.01% (w/w) in the diet. Three of the compounds, B746, B4087, and B4101, were active when administered at 0.001% in the diet. At a dietary concentration of 0.0001%, B4087 and B4101 were slightly more active than clofazimine, while B746 was less active. In the kinetic method of drug evaluation, greater anti-M. leprae activity of phenazine derivatives was generally associated with greater pigmentation of abdominal fat. Of the compounds which did not cause pigmentation when fed at a concentration of 0.01% in the diet B4090 was the most active. This compound also inhibits the growth of a clofazimine-resistant M. smegmatis strain.
PY - 1993 SP - 406 EP - 14 T2 - International journal of leprosy and other mycobacterial diseases : official organ of the International Leprosy Association TI - Activity of phenazine analogs against Mycobacterium leprae infections in mice. UR - http://ila.ilsl.br/pdfs/v61n3a05.pdf VL - 61 SN - 0148-916X ER -