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A study on geno- and immunotoxicological effects of subacute propoxur and pirimicarb exposure in rats.
Siroki, O; Institóris, L; Nehéz, M; Basaran, N; Nagymajtényi, L; Dési, I.
Afiliação
  • Siroki O; Department of Public Health, Faculty of General Medicine, University of Szeged, H-6720 Szeged, Hungary.
Ecotoxicol Environ Saf ; 50(1): 76-81, 2001 Sep.
Article em En | MEDLINE | ID: mdl-11534956
ABSTRACT
A 28-day oral exposure with 8.51, 3.40, and 0.851 mg/kg propoxur (PR) and 4.67, 1.87, and 0.467 mg/kg pirimicarb (PI) was performed in male Wistar rats, and the occurrence of numerical and structural chromosome aberrations and the changes in certain immune function parameters (plaque-forming cell (PFC) assay, delayed-type hypersensitivity reaction) and in some basic toxicological (body weight gain and weights of brain, thymus, lung, heart, liver, spleen, kidneys, adrenals, and popliteal lymph node) and hematological (white blood cells, red blood cells, hematocrit (Ht), mean cell volume of red blood cells (MCV) cell content of the femoral bone marrow) parameters were investigated. The high dose of PR increased the relative liver weight and the cell content of femoral bone marrow, and all three doses increased Ht and MCV. The applied doses of PI decreased the relative adrenal weight in a dose-dependent manner, and its highest dose increased the relative liver weight. Among the immune function parameters tested, PFC content of the spleen was decreased by high-dose PR and elevated by high-dose PI, whereas the maximum and the time course of the delayed-type hypersensitivity reaction showed no changes in this dose range. In the genotoxicological investigations only the high PR dose increased the number of numerical, but not the structural, chromosome aberrations. In addition to the changes in relative adrenal weight following PI treatment, the PFC assay showed the highest sensitivity for detection of the 4-week exposure with these carbamates. On the basis of our results, the immunotoxicological approach seems to have the same (PR) or higher (PI) sensitivity in early detection of the repeated low-dose exposure by these carbamates compared to the genotoxicological approach.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Propoxur / Pirimidinas / Carbamatos / Aberrações Cromossômicas / Sistema Imunitário / Inseticidas Tipo de estudo: Diagnostic_studies / Screening_studies Limite: Animals Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2001 Tipo de documento: Article País de afiliação: Hungria
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Propoxur / Pirimidinas / Carbamatos / Aberrações Cromossômicas / Sistema Imunitário / Inseticidas Tipo de estudo: Diagnostic_studies / Screening_studies Limite: Animals Idioma: En Revista: Ecotoxicol Environ Saf Ano de publicação: 2001 Tipo de documento: Article País de afiliação: Hungria