Chromosomal aberrations and frequency of micronuclei in sheep subchronically exposed to the fungicide Euparen Multi (tolylfluanid).
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2006;
64:312-20. [PMID:
15941588 DOI:
10.1016/j.ecoenv.2005.04.011]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2004] [Revised: 04/14/2005] [Accepted: 04/21/2005] [Indexed: 05/02/2023]
Abstract
We analyzed chromosome aberrations, micronucleus frequency, mitotic index (MI), and nuclear division index (NDI) in peripheral lymphocytes of sheep subchronically exposed to the fungicide Euparen Multi (containing 50% tolylfluanid). Euparen Multi was administered by rumen sonde to group of Merino sheep (seven sheep/group) at 93 mg/kg body weight (1/20 LD50) daily for 28 days to assess its genotoxic effects. The frequencies of aberrant cells (ABC) in the experimental and control groups were 5.50+/-1.38% and 2.40+/-1.14%, respectively, and the increase in ABC in the treated group was significant (P = 0.003). Significantly increased numbers of chromatid breaks (5.67+/-1.21% against 2.40+/-1.14%; P = 0.001), chromatid gaps (10.33+/-2.73% against 4.00+/-1.23%; P = 0.001), and chromosome gaps (1.83+/-0.75% against 0.80+/-0.45%; P = 0.025) and exchanges (3.17+/-1.94% against 0.20+/-0.45%; P = 0.009) were observed in exposed animals in comparison to control animals. The frequency of micronuclei (MN) was 29.40+/-5.86 per 1000 binucleated cells in peripheral lymphocytes of sheep in the control group and 49.57+/-19.12 per 1000 binucleated cells in the treated group. A significant increase in the frequency of MN in peripheral lymphocytes also was observed between the two groups (P = 0.0477). No statistical differences in MI and NDI values were found in the groups (P = 0.181 and 0.761, respectively). Thus, our results suggest that exposure to Euparen Multi may cause genome damage in somatic cells.
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