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Acetaminophen and Your Liver
Acetaminophen and Your Liver

... (most recently in 2009) that products containing acetaminophen should carry a warning on the label about the risk of liver toxicity. In January 2004, the FDA launched a new public education campaign warning consumers about the potential risks of acetaminophen and other pain-relievers. Some companies ...
Density-dependent dispersal may explain the mid
Density-dependent dispersal may explain the mid

... viciae became restless and consequently had more encounters which led to increased dispersal. In order to minimise effects of the decrease in host quality, we compared our model results with the empirical data for the alder aphid (P. alni), a tree-dwelling aphid, for which variation in host plant qu ...
Body Temperature and Analgesic Effects of Selective Mu and Kappa
Body Temperature and Analgesic Effects of Selective Mu and Kappa

... blocked or antagonized by selective kappa receptor antagonists (Cavicchini et al., 1988; Handler et al., 1992). On the basis of findings such as these, we hypothesized that the hyperthermic response to opioids is mediated by the mu receptor and the hypothermic response is mediated by the kappa recep ...
Analgesia - Online CPD Courses for Veterinary Nurses
Analgesia - Online CPD Courses for Veterinary Nurses

... Naloxone is a full opioid antagonist which can be used to reverse the effects of full μ agonists and mixed agonists antagonists, however it does not effectively antagonize the effects of the partial opioid agonist buprenorphine because buprenorphine has a greater affinity for the μ receptors than na ...
The cannabinoids: An overview. Therapeutic implications in
The cannabinoids: An overview. Therapeutic implications in

... less psychotropic, much less expensive to produce and is much more stable than ∆9-THC. A clinical trial was started at a low dose (5 mg/m2), which in some adults is enough to cause typical marijuana effects and anxiety. At this or higher doses, no psychotropic effects were seen in children. Vomiting ...
Quantitative Rationalization of Gemfibrozil Drug Interactions
Quantitative Rationalization of Gemfibrozil Drug Interactions

... 2003b). As a perpetrator drug, gemfibrozil presents a complex profile involving inhibition of multiple transporters and cytochrome P450 2C8 (CYP2C8) by parent and a circulating metabolite, gemfibrozil 1-O-b-glucuronide (Gem-Glu). Cerivastatin was withdrawn from the worldwide market in 2001 because o ...
Ocular Toxicology and Pharmacology
Ocular Toxicology and Pharmacology

... Cancer Chemotherapy • Neuro-ophthalmic (Side effects from most cytostatic agents) – Carmustine, vinblastine, vincristine: Damage to optic and oculomotor nerves – Cislatin: Disc edema, retinal edema, optic neuritis • Toxicity may be due to CNS accumulation of drug ...
Peer-reviewed Article PDF
Peer-reviewed Article PDF

... Initial scientific studies with kratom concentrated on the chemical characterization of its constituents. Mitragynine, which is the most abundant alkaloid in the leaves, was first isolated in 1921; its chemical structure was elucidated four decades later. By now, over 40 ...
First Dose in Humans
First Dose in Humans

... Criteria for pharmacologically relevant species: Pharmacological activity in vivo Pharmacological activity in vitro – activity/potency compared to human Receptor binding affinity, occupancy and on/off rates compared to human Target – sequence homology, receptor or ...
Benzodiazepine Overdose and Withdrawal
Benzodiazepine Overdose and Withdrawal

... lingers for a long time, we can ignore that. The methamphetamine and cocaine levels are low, let’s ignore those. The levels of heroin, alprazolam, and alcohol are all quite high. Larry, put three more tick marks on the board: one heroin death, one benzodiazepine death, and one alcohol death. Okay, n ...
New Insights on Dimethylaminoethanol (DMAE)
New Insights on Dimethylaminoethanol (DMAE)

... oxidative stress promotes aging and many seemingly diverse age-associated diseases [24, 25]. In 1977, the Hungarian physician Imre Nagy proposed the membrane hypothesis of aging which posited the cell membrane as the key target of free radical activity and which has been confirmed experimentally [26 ...
Terminology and Information on Drugs
Terminology and Information on Drugs

... MAJOR CANNABINOIDS Tetrahydrocannabinol (THC) Cannabidiol (CBD) Cannabinol (CBN) ...
et al. - Deep learning for chemoinformatics
et al. - Deep learning for chemoinformatics

... • Finding tool/endogenous molecules is hard! Interrogating orphan GPCRs en masse in a parallel and simultaneous fashion is currently technologically and economically unfeasible. ...
Desensitization of Cannabinoid-Mediated Presynaptic Inhibition of
Desensitization of Cannabinoid-Mediated Presynaptic Inhibition of

... internalization of the receptor also occurs in hippocampal neurons grown in primary culture, although at a slower rate than that observed when receptors and signaling components were expressed at high levels in heterologous systems (Coutts et al., 2001). What remains unclear is how the changes in re ...
A descriptive study to provide evidence of the teratogenic and... Sibutramine and Ephedrine on cardiac- and liver-tissue of chick embryos
A descriptive study to provide evidence of the teratogenic and... Sibutramine and Ephedrine on cardiac- and liver-tissue of chick embryos

... women, there is the potential that it will affect the developing foetus. This teratogenic potential of compounds has received much attention in research, especially after the thalidomide disaster of the 1950‟s and 60‟s [Froster and Baird, 1993; Dally, 1998]. Although patients are generally advised t ...
Journal of Chemical and Pharmaceutical Research __________________________________________________
Journal of Chemical and Pharmaceutical Research __________________________________________________

... psychosis have also been reported with more than one-month use of scopolamine.[4] Studies have indicated that M3 and M5 receptors may be responsible for the beneficial effect of anticholinergics. Agents selective for vestibular subtypes of muscarinic receptors are being developed as these agents may ...
BASIN: Basin-scale Analysis, Synthesis, and INtegration
BASIN: Basin-scale Analysis, Synthesis, and INtegration

... The justification for the BASIN program is the scale of influence of global change and the added value of co-ordinating the scientific activities of the EU and North American countries to assess, predict, and mitigate the impact of climate and anthropogenic forcing on marine ecosystems and services ...
Comparative veterinary  H. Hutchinson
Comparative veterinary H. Hutchinson

... lineages (including CYP19, CYP21 and CYP27 gene families; whereby the CYP21 family later diverged to give rise to the CYP1 and CYP2 families). A final major expansion of several P450 families involved in xenobiotic metabolism (including CYP2, CYP3, CYP4 and CYP6), began about 400 Ma. This most recen ...
Thyroid Problems - American Medical College of Homeopathy
Thyroid Problems - American Medical College of Homeopathy

... metabolic rate of the body. Hence, imbalances of thyroid hormones can have an intense effect on an individual's energy levels. Sometimes the disturbances are very clear and easily diagnosed. Often though, they can be rather delicate and easily overlooked. Overactive thyroid function known as Hyperth ...
Commentary: Theoretical Predictions of Flow Effects on Intestinal
Commentary: Theoretical Predictions of Flow Effects on Intestinal

... virtue of inclusion of transport and eliminatory events, these physiologically based models are able to more accurately describe the net appearance of the formed metabolite into the systemic circulation, because metabolite levels can be drastically reduced as a result of sequential metabolism (Pang ...
Receptor af峪ity and potency of non-steroidal antiandrogens
Receptor af峪ity and potency of non-steroidal antiandrogens

... al 31 have reported comparable af®nities for these agents at both wild-type rat and human prostate androgen receptors (Table 1). However, compared with other studies, the IC50 values (calculated as the concentration of drug required to produce 50% displacement of [3H]R1881) were generally over three ...
Hallucinatory and rewarding effect of salvinorin A in zebrafish: κ
Hallucinatory and rewarding effect of salvinorin A in zebrafish: κ

... dependent modifications of locomotor activity (Gerlai et al. 2000) and tolerance as has been observed in mammals as well as Drosophila (Scholz et al. 2000). Moreover, ethanolinduced hyperlocomotion can be blocked by the addition of a dopamine antagonist, suggesting the involvement of the brain dopam ...
Dangers in Herbs-Drug Interactions
Dangers in Herbs-Drug Interactions

... Challenges with evidence related to herb-drug interactions  Many published studies lack rigorous design  May not reflect how complementary medicines are used in practice  Not conducted in the patient group of interest  Product quality and variability is a key concern  Ginkgo biloba (based on E ...
The Role of The A2A Receptor in Cell Apoptosis Caused by MDMA
The Role of The A2A Receptor in Cell Apoptosis Caused by MDMA

... MDMA causes hallucination and psychostimulation, as well as long-term neuropsychiatric behaviors such as panic and psychosis. In rodents and monkeys, MDMA is cytotoxic to serotonergic neurons, but this is less clear with humans (3). The onset of its effect can take 20 to 60 minutes to occur, with a ...
Prior Elicitation in Bayesian Clinical Trial Design
Prior Elicitation in Bayesian Clinical Trial Design

... 1990) with a Bayesian Logistic Regression Model 1) Specify a model for p(xj,q) = Pr(Toxicity| q, dose xj) and prior on q 2) Physician specifies pTOX* = a target Pr(Toxicity) 3) Treat each successive cohort of 3 pats. at the “best” dose for which E[p(xj,q) | data] is closest to pTOX* 4) The best dose ...
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Toxicodynamics



Toxicodynamics, termed pharmacodynamics in pharmacology, describes the dynamic interactions of a toxicant with a biological target and its biological effects. A biological target, also known as the site of action, can be binding proteins, ion channels, DNA, or a variety of other receptors. When a toxicant enters an organism, it can interact with these receptors and produce structural or functional alterations. The mechanism of action of the toxicant, as determined by a toxicant’s chemical properties, will determine what receptors are targeted and the overall toxic effect at the cellular level and organismal level.Toxicants have been grouped together according to their chemical properties by way of quantitative structure-activity relationships (QSARs), which allows prediction of toxic action based on these properties. endocrine disrupting chemicals (EDCs) and carcinogens are examples of classes of toxicants that can act as QSARs. EDCs mimic or block transcriptional activation normally caused by natural steroid hormones. These types of chemicals can act on androgen receptors, estrogen receptors and thyroid hormone receptors. This mechanism can include such toxicants as dichlorodiphenyltrichloroethane (DDE) and polychlorinated biphenyls (PCBs). Another class of chemicals, carcinogens, are substances that cause cancer and can be classified as genotoxic or nongenotoxic carcinogens. These categories include toxicants such as polycyclic aromatic hydrocarbon (PAHs) and carbon tetrachloride (CCl4). The process of toxicodynamics can be useful for application in environmental risk assessment by implementing toxicokinetic-toxicodynamic (TKTD) models. TKTD models include phenomenas such as time-varying exposure, carry-over toxicity, organism recovery time, effects of mixtures, and extrapolation to untested chemicals and species. Due to their advantages, these types of models may be more applicable for risk assessment than traditional modeling approaches.
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