Research Article

Genotoxicity Revaluation of Three Commercial Nitroheterocyclic Drugs: Nifurtimox, Benznidazole, and Metronidazole

Table 1

Specific mutagenic activity (revertant increase/dose unit calculated by linear regression analysis on the curve section with response linearity) of NFX, BNZ, and MTZ on different Salmonella strains without or with (+) S9 mix; in brackets: 𝑟 2 value (A). Positive controls are reported for each strain (HYC: hycantone; 2-AF: 2-aminofluorene; FYFA: furylfuramide; 2NF: 2-nitrofluorene); mean (±SD) of three plates (B). *P < .05 Dunnett’s C.
(a)

Revertant increase/dose unit

StrainNFXBNZMTZ
TA10080.28 (0.99)64.96 (0.98)5.11 (0.98)
TA100 +78.91 (0.98)60.92 (0.98)5.45 (0.96)
TA100NR5.18 (0.99)1.75 (0.81)0.37 (0.94)
TA982.37 (0.99)0.07 (0.88)0.05 (0.89)
TA98 +2.06 (0.99)0.10 (0.93)0.08 (0.97)
TA98NR0.17 (0.94)0.07 (0.93)0.02 (0.79)

(b)

Revertant/plate

StrainHYC2-AFFYFA2-NF
TA100968 ± 103*194 ± 211133 ± 70*
TA100 +521 ± 47*
TA100NR785 ± 97*247 ± 34
TA98870 ± 90*21 ± 5189 ± 16*169 ± 7*
TA98 +808 ± 70*
TA98NR833 ± 71*25 ± 419 ± 4