Giovanna Randine

Learn More
Methylmercury (MeHg) affects several parameters of cholinergic function. These alterations are thought to play a role in MeHg neurotoxicity. In vitro experiments have indicated that MeHg acts as a strong competitive inhibitor of radioligand binding to muscarinic cholinergic receptors (mAChRs) in rat brain. Furthermore, rat brain mAChRs share several(More)
The individual and joint effects of methylmercury (MeHg; 1 mg/kg body weight/day, GD7-PND7) and PCB153 (20 mg/kg body weight/day, GD10-GD16), administered orally to rat dams, were explored in 21-day-old rat offspring brain in terms of monoamine oxidase B (MAO-B) activity and regional content of dopamine (DA), serotonin (5-HT), 5-hydroxy-indole-3-acetic acid(More)
Lymphocyte cholinergic muscarinic receptors (MRs) and platelet monoamine oxidase-B (MAO-B) activity are considered surrogate markers of the same parameters in the central nervous system. Lymphocyte MR binding and platelet MAO-B activity were measured in a consistent number of healthy human adults and analysed according to gender and age. The mean value±S.D.(More)
Cerebral cholinergic muscarinic receptors (MR) have been suggested as one of the sensitive biochemical endpoints of the central nervous system altered by developmental exposure to the widespread seafood contaminant methylmercury (MeHg). In adult rats, MeHg has been shown to alter MR binding both in the brain and lymphocytes, supporting the use of MR in(More)
AIMS AND METHODS The present study evaluated time-related changes in platelet monoamine oxidase B (MAO-B) activity in an Italian cohort of alcohol-dependent subjects (n = 98) during early abstinence, and the effect of potential confounding factors, such as gender and smoking status, on the temporal trend of the enzyme activity. RESULTS While still under(More)
The developing nervous system is thought to be particularly sensitive to polychlorinated biphenyls (PCBs) present as food contaminants together with methylmercury (MeHg). Effects of perinatal co-exposure to PCB153 and MeHg on brain cholinergic muscarinic receptors (MRs) were investigated by saturation binding studies in mature and immature rats. MeHg alone(More)
Previous studies have indicated that workers exposed to styrene present a decreased activity of platelet monoamine oxidase B (MAO B), suggesting that this biochemical assay may represent a biomarker for styrene-induced neurotoxicity. This study was undertaken to determine whether exposure to styrene would cause changes in MAO B activity in the target(More)
Exposure of mature rat cerebellar granule neurons to non-depolarizing conditions (5 mM K+) for 24 h resulted in the onset of apoptosis. NMDA, forskolin, carbachol and GABA attenuated low K+-induced toxicity, although to a different extent, with NMDA and GABA being the most effective agents. When cells were co-exposed for 24 h to ethanol, the survival(More)
Changes in cerebral cytochrome oxidase (COX) activity, nitric oxide (NO)-cyclic GMP (cGMP) pathway and cholinergic muscarinic receptors (MRs) have been reported in rodents acutely exposed to carbon monoxide (CO). These endpoints measurable in lymphocytes may serve as peripheral markers of CO neurotoxicity. The early and delayed effects of repeated and acute(More)
  • 1