Effect of subacute poisoning with bifenthrin on locomotor activity, memory retention, haematological, biochemical and histopathological parameters in mice.

UNLABELLED: Bifenthrin (BIF) is a pyrethroid (PYR) insecticide. The target point for PYR's toxic action are voltage sensitive sodium channels in the central nervous system (CNS). Intoxication with PYRs results in motor activity impairment and death in insects. Although PYRs are considered to be safe for mammals, there were numerous cases of pyrethroid poisoning in humans, animals and pets described. The general population is chronically exposed to PYRs via grain products, dust and indoor air. Therefore new questions arise: whether PYRs act in a dose-additive fashion in the course of subacute poisoning, are there other target organs (but brain) for BIF and if there is one common mechanism of its' toxic action in different organs. The objective of this work was to characterize the effect of BIF at the doses of 4 or 8 mg/kg injected intraperitoneally (i.p.) daily for 28 consecutive days on memory and motor activity, hematological, biochemical and histopathological parameters in mice. BIF at the doses of 8 mg/kg or 4 mg/kg of body mass was administered i.p. daily to the mice for 28 consecutive days. Motor function was measured on day 1, 7, 14 and 28 and memory retention was tested in a passive avoidance task on day 2, 7, 14 and 28. BIF significantly impaired memory retention on day 2. BIF decreased locomotor activity at every stage of the experiment in a single dose depending manner. No behavioral cumulative effect was observed. Subacute poisoning with the higher dose of BIF caused anaemia, elevated white blood cell count (WBC), elevated alanine transaminase (ALT), superoxide dismuthase (SOD), and decreased glutathione peroxidase (GPx) activity. Lymphocyte infiltrates were visualized in the livers. IN CONCLUSION: subacute poisoning with BIF decreases locomotor activity in a single dose proportionate manner. BIF damages also the liver and alters blood morphology. The possible common mechanism of these effects can be oxidative stress.

[Effect of progestagens administered during pregnancy on histochemical reaction in fetal liver]. / Wplyw progestagenów podawanych w okresie ciazy na odczyny histochemiczne w watrobie plodowej.

Fetal liver was examined in rats, whose mothers during pregnancy received Turinal (firm: Chemical Works of Gedeon Richter LTD Budapest, Hungary) in a dosage of 0.5 mg/kg BW in the experimental group I and 1 mg/kg BW in the experimental group II. Reaction to the activity of succinate dehydrogenase, lactic dehydrogenase, acid phosphatase, glucose-6-phosphatase, PAS-reaction (Periodic acid Schiff reaction) and hematoxylin-eosin staining were carried out. Changes in the activity of examined enzymes and PAS-reaction in fetal liver depending on dosage were observed. These changes testify to a large influence of administered hormone on metabolism of developing fetal liver.