Joseph Yanai

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During critical developmental periods, cholinergic activity plays a key role in programming the development of target cells. In the current study, ontogeny of cholinergic terminals and their activity were contrasted in 4 brain regions of the fetal and neonatal rat using choline acetyltransferase activity, which is unresponsive to changes in impulse flow,(More)
Despite the basic differences in their underlying biological targets, prenatal exposure to heroin or phenobarbital produces similar syndromes of neurobehavioral deficits, involving defects in septohippocampal cholinergic innervation-related behaviors. At the cellular level, these deficits are associated with cholinergic hyperactivity, characterized by(More)
Commercial unboiled honey was applied topically to open wounds of 12 mice. Twelve other mice served as a control group and their wounds were dressed with saline solution only. Wound healing was judged histopathologically by measuring the thickness of granulation tissue, epithelization from the periphery of the wound, and the size of the open wounds. The(More)
Administration of heroin or phenobarbital to pregnant mice evokes neurochemical and behavioral deficits consequent to disruption of septohippocampal cholinergic innervation. The present study evaluates the relationship between the drug-induced biochemical changes and the behavioral deficits, applying two different approaches: neural grafting and(More)
Isolated C57BL/10 mice fed liquid diet as their only nutritional supply consumed 44% more diet than did groupedhoused mice. A similar increase due to isolation of 36% for C57BL/10 mice and of 89% for DBA/1 mice was demonstrated when the sucrose in the liquid diet was replaced by an equicaloric (6% v/v) amount of ethanol. The ethanol-drinking isolated mice(More)
Mice were exposed to nicotine prenatally by injecting the mother with 1.5 mg/kg nicotine SC twice daily on gestation days 9-18 (PreN mice) or neonatally by daily SC injections of 1.5 mg/kg nicotine on postnatal days 2-21 (NeoN mice). At age 50 days, hippocampal muscarinic receptors Bmax of PreN and NeoN mice were 58% and 79% above control, respectively (p(More)
A wide variety of drugs and chemicals elicit neurobehavioral teratogenesis. Surprisingly, however, despite the obvious differences among unrelated compounds, the behavioral outcomes often display striking similarities, such as cognitive and attentional deficits. Recent studies of drugs of abuse (heroin, nicotine, barbiturates) and environmental toxins(More)
Mice were exposed to diacetylmorphine (heroin) or phencyclidine (PCP) prenatally or neonatally. At a later age, they were tested for hippocampus-related behavioral deficits and concomitant alterations in the septohippocampal cholinergic innervations. Actually, this is an application of the previously established phenobarbital neuroteratogenicity model to(More)
Naloxone (0.80 mg/kg) and morphine (7.5 mg/kg) were given to rats or guinea pigs with increasing doses of amphetamine (0.5-6.0 mg/kg) to determine their respective effects on amphetamine-induced stereotypy. In contrast to the inhibiting and potentiating effect of these agents on apomorphine-induced stereotyped behavior, naloxone enhanced and morphine(More)