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Genotoxic effects of the carbamate insecticide methomyl. I. In vitro studies with pure compound and the technical formulation “Lannate 25”
Author(s) -
Bonatti Stefania,
Bolognesi Claudia,
Degan Paolo,
Abbondandolo Angelo
Publication year - 1994
Publication title -
environmental and molecular mutagenesis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1
H-Index - 87
eISSN - 1098-2280
pISSN - 0893-6692
DOI - 10.1002/em.2850230408
Subject(s) - methomyl , micronucleus test , micronucleus , genotoxicity , carbamate , sister chromatid exchange , local lymph node assay , biology , chemistry , toxicology , biochemistry , dna , pesticide , in vitro , toxicity , organic chemistry , potency , agronomy
The carbamate insecticide methomyl and the methomyl‐containing technical formulation “Lannate 25” were tested on whole blood human lymphocyte cultures. Both products induced dose‐dependent increases in chromosome aberrations and micronuclei. Lannate 25 induced DNA damage as measured by the alkaline elution assay and hydroxylation of guanine at the C8 position. Sister chromatid exchanges were not increased significantly with either product. Overall, the technical formulation was more active than the pure compound, when compared at similar concentrations of active principle. Moreover, a different ratio of CREST‐positive/CREST‐negative micronuclei was observed with the two products, pure methomyl being relatively more active than Lannate 25 in the induction of CREST‐positive micronuclei. On the basis of these results, previous evaluations of methomyl as a nongenotoxic compound should be reconsidered. © 1994 Wiley‐Liss, Inc.