The effects of oxiracetam on hippocampally-mediated learning performance and hippocampal protein kinase C (PKC) were examined in C57BL/6Ibg (C57) and DBA/2Ibg (DBA) mice. C57 and DBA mice were subjected to daily injections of oxiracetam (50 mg/kg i.p.) or vehicle (0.9% saline) for a total of 9 days. C57 and DBA mice were examined on a modified version of the...
Abstract This review briefly summarizes the multiple actions by which melatonin reduces the damaging effects of free radicals and reactive oxygen and nitrogen species. It is well documented that melatonin protects macromolecules from oxidative damage in all subcellular compartments. This is consistent with the protection by melatonin of lipids and proteins, as well as both nuclear and mitochondrial DNA....
In order to explain cognition-enhancing effects of standardized Ginkgo biloba extract (EGb761), an increase of central monoaminergic neurotransmission has been suggested, but the underlying mechanisms have not yet been elucidated. Here, we confirm that the norepinephrine (NET), the serotonin (SERT), the dopamine (DAT) uptake transporters and MAO activity are inhibited by EGb761 in vitro, although rather high concentrations are...
The psychophysiological model of provoking different emotional states by watching film excerpts with various emotional contents was used to characterize drug action in 80 subjects (male/female=50%) with threshold emotional disturbance within a randomized, group-parallel, double-blind, placebo-controlled study. Analyzing the brain's electrical reaction during presentation of 5 videoclips of 7 min duration followed by 3 minutes pause revealed a content...
Abstract OBJECTIVE: Estimate effectiveness of goal setting for nutrition and physical activity behavior change, review the effect of goal-setting characteristics on behavior change, and investigate effectiveness of interventions containing goal setting.
BACKGROUND: Tea leaves contain varying amounts of polyphenols of which the majority are catechins. There has been a sizable amount of research on the potential effect of green tea catechins for cancer risk, cardiovascular disease risk and weight loss; all conditions that are relevant to mid-life health. The aim was to produce an overview of the evidence for green...
Ischemic stroke results in brain damage and behavioral deficits including memory impairment. Protective effects of green tea extract (GTex) and its major functional polyphenol (-)-epigallocatechin gallate (EGCG) on memory were examined in cerebral ischemic rats. GTex and EGCG were administered 1 hr before middle cerebral artery ligation in rats. GTex, EGCG, and pentoxifylline (PTX) significantly improved ishemic-induced memory impairment...
Background: Although considerable experimental and animal evidence shows that green tea may possess potent activities of neuroprotection, neurorescue, and amyloid precursor protein processing that may lead to cognitive enhancement, no human data are available.
1. The effect of the nootropic drug oxiracetam on hippocampal neurotransmission was investigated in the CA1 region of the rat hippocampal slice in vitro by use of extracellular recordings. 2 Superfusion of oxiracetam (0.1–100 μm) produced a concentration-dependent, wash-resistant (>90 min), increase in initial slope and amplitude of the dendritic field excitatory postsynaptic potential (e.p.s.p.). This increase was maximal...
The effects of the nootropie drugs Piracetam (Pir) and Pramiracetam (Pram) were evaluated on recognition-memory of rats in a new one-trial test. This test is based on spontaneous exploratory activity and does not involve rule learning or reinforcement. Recognition is measured by the time spent by rats in exploring two different objects, one familiar (the sample), the...
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