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https://doi.org/10.2478/aiht-2022-73-3665

The effect of low doses of chlorpyrifos on blood and bone marrow cells in Wistar rats

Vilena Kašuba orcid id orcid.org/0000-0002-2151-0400 ; Institute for Medical Research and Occupational Health, Zagreb, Croatia
Vedran Micek ; Institute for Medical Research and Occupational Health, Zagreb, Croatia
Mirta Milić orcid id orcid.org/0000-0002-9837-7185 ; Institute for Medical Research and Occupational Health, Zagreb, Croatia
Davor Želježić ; Institute for Medical Research and Occupational Health, Zagreb, Croatia
Anja Katić ; Institute for Medical Research and Occupational Health, Zagreb, Croatia


Puni tekst: engleski pdf 735 Kb

str. 223-232

preuzimanja: 253

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Puni tekst: hrvatski pdf 735 Kb

str. 232-232

preuzimanja: 73

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Sažetak

The aim of this study was to investigate the genotoxic potential of low doses of chlorpyrifos (CPF) on blood and bone marrow cells in adult male Wistar rats. CPF was administered by oral gavage at daily doses of 0.010, 0.015, and 0.160 mg/kg of body weight (bw) for 28 consecutive days. Positive control (PC) was administered 300 mg/kg bw/day of ethyl methane sulphonate (EMS) for the final three days of the experiment. Toxic outcomes of exposure were determined with the in vivo micronucleus (MN) assay and alkaline comet assay. The 28-day exposure to the 0.015 mg/kg CPF dose, which was three times higher than the current value of acute reference dose (ARfD), reduced body weight gain in rats the most. The in vivo MN assay showed significant differences in number of reticulocytes per 1000 erythrocytes between PC and negative control (NC) and between all control groups and the groups exposed to 0.015 and 0.160 mg/kg bw/day of CPF. The number of micronucleated polychromatic erythrocytes per 2000 erythrocytes was significantly higher in the PC than the NC group or group exposed to 0.015 mg/kg bw/day of CPF. CPF treatment did not significantly increase primary DNA damage in bone marrow cells compared to the NC group. However, the damage in bone marrow cells of CPF-exposed rats was much higher than the one recorded in leukocytes, established in the previous research. Both assays proved to be successful for the assessment of CPFinduced genome instability in Wistar rats. However, the exact mechanisms of damage have to be further investigated and confirmed by other, more sensitive methods.

Ključne riječi

alkaline comet assay; body weight changes; genotoxicity; in vivo micronucleus assay; low doses

Hrčak ID:

283984

URI

https://hrcak.srce.hr/283984

Datum izdavanja:

29.9.2022.

Podaci na drugim jezicima: hrvatski

Posjeta: 590 *