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Abstract Stimulation by quinidine of warfarin metabolism in vitro was first demonstrated with liver microsomal preparations. We report herein that this drug interaction is reproducible in an animal model but that it exhibits profound species differences. Thus, using rabbit liver microsomes and a...
Abstract One of the characteristics of drug dependence is that a drug has to be administered repeatedly before withdrawal effects can be observed. We have previously shown that withdrawal after 14 days of cocaine treatment produces a supersensitivity of hypothalamic 5-hydroxytryptamine...
Abstract γ-Hydroxybutyrate (GHB) is used for the treatment of alcoholism and to induce absence seizures in animals, but it has also recently emerged as a drug of abuse. In hippocampal neurons, GHB may activate its own putative receptor as well as GABA B receptors to affect synaptic transmission....
Abstract Activation of protease-activated receptors (PARs) in non-neural tissue results in prostaglandin production. Because PARs are found in the spinal cord and increased prostaglandin release in the spinal cord causes thermal hyperalgesia, we hypothesized that activation of these spinal PARs...
Abstract Many gluten peptides elicit proliferative responses from T cells from Celiac Sprue patients, influencing the pathogenesis of this small intestinal disorder. These peptides are Pro- and Gln-rich in character, suggesting that resistance to proteolysis promotes their toxicity. To test this...
Abstract The nigrostriatal dopamine system of the mammalian brain is necessary for normal voluntary motor activity. Dopamine exerts its effects by acting on two primary receptor subtypes: D1-like (D1 and D5) and D2-like (D2, D3, and D4) receptors. Previous research has indicated that both...
Abstract We previously identified a novel endogenous substance, serofendic acid, from a lipophilic extract of fetal calf serum. Serofendic acid protects cultured cortical neurons against the cytotoxicity of glutamate and nitric oxide. Here, we reported the protective effect of serofendic acid on...
Abstract 4-( N -Methyl- N -nitrosamino)-1-(3-pyridyl)-1-butanone (NNK), the tobacco-specific nitrosamine, induces lung cancer in all animal species tested and is thought to contribute significantly to the high lung cancer burden associated with smoking. However, there is no report whether NNK...
Abstract We have shown that neurokinin A-induced contraction of human sigmoid circular muscle (HSCM) is reduced in patients with ulcerative colitis and that interleukin (IL)-1β may play a role in this change. We now examine changes in the signal transduction pathway mediating neurokinin...
Abstract Methamphetamine intoxication causes long-lasting damage to dopamine nerve endings in the striatum. The mechanisms underlying this neurotoxicity are not known but oxidative stress has been implicated. Microglia are the major antigen-presenting cells in brain and when activated, they...
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