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Deuterated Drug
A deuterated drug is a small molecule medicinal product in which one or more of the hydrogen atoms in the drug molecule have been replaced by its heavier stable isotope deuterium. Because of the kinetic isotope effect, deuterium-containing drugs may have significantly lower rates of metabolism, and hence a longer half-life. Mode of action Hydrogen is a chemical element with an atomic number of 1. It has one proton and one electron. Deuterium is the heavier naturally-occurring stable isotope of hydrogen. Deuterium was discovered by Harold Urey in 1931, for which he received the Nobel Prize in 1934. The deuterium isotope effect has become an important tool in the elucidation of the mechanism of chemical reactions. Deuterium contains one proton, one electron, and a neutron, effectively doubling the mass of the deuterium isotope without changing its properties significantly. However, the C–D bond is a bit shorter, and it has reduced electronic polarizability and less hyperconjugati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ethyl Linoleate Ordinary And Heavy
Ethyl may refer to: Arts and entertainment *Ethyl Sinclair, a character in the ''Dinosaurs'' television show Science and technology * Ethyl group, an organic chemistry moiety * Ethyl alcohol (or ethanol) * Ethyl Corporation, a fuel additive company ** Tetraethyllead Tetraethyllead (commonly styled tetraethyl lead), abbreviated TEL, is an organolead compound with the formula lead, Pb(ethyl group, C2H5)4. It was widely used as a fuel additive for much of the 20th century, first being mixed with gasoline begi ...-treated gasoline See also * Ethel (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drug Metabolism
Drug metabolism is the metabolic breakdown of drugs by living organisms, usually through specialized enzymatic systems. More generally, xenobiotic metabolism (from the Greek xenos "stranger" and biotic "related to living beings") is the set of metabolic pathways that modify the chemical structure of xenobiotics, which are compounds foreign to an organism's normal biochemistry, such as any drug or poison. These pathways are a form of biotransformation present in all major groups of organisms and are considered to be of ancient origin. These reactions often act to detoxify poisonous compounds (although in some cases the intermediates in xenobiotic metabolism can themselves cause toxic effects). The study of drug metabolism is the object of pharmacokinetics. Metabolism is one of the stages (see ADME) of the drug's transit through the body that involves the breakdown of the drug so that it can be excreted by the body. The metabolism of pharmaceutical drugs is an important as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tyrosine Kinase 2
Non-receptor tyrosine-protein kinase TYK2 is an enzyme that in humans is encoded by the ''TYK2'' gene. TYK2 was the first member of the JAK family that was described (the other members are JAK1, JAK2, and JAK3). It has been implicated in IFN-α, IL-6, IL-10 and IL-12 signaling. Function This gene encodes a member of the tyrosine kinase and, to be more specific, the Janus kinases (JAKs) protein families. This protein associates with the cytoplasmic domain of type I and type II cytokine receptors and promulgate cytokine signals by phosphorylating receptor subunits. It is also component of both the type I and type III interferon signaling pathways. As such, it may play a role in anti-viral immunity. Cytokines play pivotal roles in immunity and inflammation by regulating the survival, proliferation, differentiation, and function of immune cells, as well as cells from other organ systems. Hence, targeting cytokines and their receptors is an effective means of treating such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Janus Kinase Inhibitor
A Janus kinase inhibitor, also known as JAK inhibitor or jakinib, is a type of immune modulating medication, which inhibits the activity of one or more of the Janus kinase family of enzymes ( JAK1, JAK2, JAK3, TYK2), thereby interfering with the JAK-STAT signaling pathway in lymphocytes. JAK inhibitors are used in the treatment of some cancers and inflammatory diseases such as rheumatoid arthritis and various skin conditions. A Janus kinase 3 inhibitor is attractive as a possible treatment of various autoimmune diseases since its function is mainly restricted to lymphocytes. JAK inhibitors can suppress the signaling of pro- inflammatory cytokines. Pro-inflammatory cytokines are major contributors to the cause of an over active immune system, resulting in inflammation and pain. JAK inhibitors have the ability to slow down this over activity by the suppression of the intracellular signaling. Contraindications JAK enzymes are part of the JAK/STAT pathway. This signaling ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deucravacitinib
Deucravacitinib, sold under the brand name Sotyktu, is a medication used for the treatment of moderate-to-severe plaque psoriasis. It is a tyrosine kinase 2 (TYK2) inhibitor and it is taken by mouth. It was developed by Bristol Myers Squibb. Deucravacitinib was approved for medical use in the United States in September 2022, and in Australia in December 2022. The US Food and Drug Administration (FDA) considers it to be a first-in-class medication. Medical uses Deucravacitinib is indicated for the treatment of adults with moderate-to-severe plaque psoriasis. Mechanism of action It acts as a highly selective allosteric inhibitor of non-receptor tyrosine-protein kinase 2 (TYK2). Molecule design The chemical structure of deucravacitinib contains a methyl amide in which all three hydrogen atoms are replaced by deuterium. Society and culture Legal status In January 2023, the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huntington's Disease
Huntington's disease (HD), also known as Huntington's chorea, is an incurable neurodegenerative disease that is mostly Genetic disorder#Autosomal dominant, inherited. It typically presents as a triad of progressive psychiatric, cognitive, and motor symptoms. The earliest symptoms are often subtle problems with mood or mental/psychiatric abilities, which precede the motor symptoms for many people. The definitive physical symptoms, including a general Ataxia, lack of coordination and an unsteady human gait, gait, eventually follow. Over time, the basal ganglia region of the brain gradually Basal ganglia disease#Huntington's disease, becomes damaged. The disease is primarily characterized by a distinctive hyperkinesia, hyperkinetic movement disorder known as ''chorea.'' Chorea classically presents as uncoordinated, involuntary, "dance-like" body movements that become more apparent as the disease advances. Physical abilities gradually worsen until Motor coordination, coordinated mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chorea
Chorea, or (rarely) choreia, () is an abnormal involuntary movement disorder, characterized by quick movements of the hands or feet. It is one of a group of neurological disorders called dyskinesias. The term ''chorea'' is derived , as the movements of the body is comparable to dancing. The term hemichorea refers to chorea of one side of the body, such as chorea of one arm but not both (analogous to hemiballismus). Presentation Chorea is characterized by brief, semi-directed, irregular movements that are not repetitive or rhythmic, but appear to flow from one muscle to the next. These 'dance-like' movements of chorea often occur with athetosis, which adds twisting and writhing movements. Walking may become difficult and include odd postures and leg movements. Unlike ataxia, which affects the quality of voluntary movements, or Parkinsonism, which is a hindrance of voluntary movements, the movements of chorea and ballism occur on their own, without conscious effort. Thus, chorea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teva Pharmaceuticals
Teva Pharmaceutical Industries Ltd. (also known as Teva Pharmaceuticals) is an Israeli multinational Pharmaceutical industry, pharmaceutical company. Teva specializes primarily in generic drugs, but other business interests include branded-drugs, active pharmaceutical ingredients (APIs) and, to a lesser extent, contract manufacturing services and an out-licensing platform. Teva's primary branded products include Austedo (deutetrabenazine) which is used for the treatment of chorea associated with Huntington's disease and tardive dyskinesia; and Ajovy (fremanezumab), used for the preventive treatment of migraine in adults. Additional branded drugs sold by Teva include Copaxone, Bendeka and Treanda, all of which are primarily sold in the United States. Teva is listed on the Tel Aviv Stock Exchange and the New York Stock Exchange. Its manufacturing facilities are located in Israel, North America, Europe, Australia, and South America. The company is a member of the Pharmaceutical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrabenazine
Tetrabenazine is a drug for the symptomatic treatment of hyperkinetic movement disorders. It is sold under the brand names Nitoman and Xenazine among others. On August 15, 2008, the US Food and Drug Administration (FDA) approved the use of tetrabenazine to treat chorea associated with Huntington's disease. Although other drugs had been used "off-label", tetrabenazine was the first approved treatment for Huntington's disease in the United States. The compound has been known since the 1950s. Medical uses Tetrabenazine is used as a treatment, but not as a cure, for hyperkinetic disorders such as: * Huntington's disease – specifically, the chorea associated with it * Tourette syndrome and other tic disorders * Tardive dyskinesia, a serious and sometimes irreversible side effect of long-term use of many antipsychotics, mainly typical antipsychotics * Hemiballismus, spontaneous flinging limb movements due to contra-lateral subthalamic nucleus damage Tetrabenazine has been used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deutetrabenazine
Deutetrabenazine (trade name Austedo) is a vesicular monoamine transporter 2 inhibitor which is used for the treatment of chorea associated with Huntington's disease and tardive dyskinesia. Chemically, deutetrabenazine is an isotopic isomer of tetrabenazine in which six hydrogen atoms have been replaced by deuterium atoms. The incorporation of deuterium slows the rate of drug metabolism, allowing less frequent dosing. Efficacy A '' Lancet'' study published on 28 June 2017 carried out a review between 29 October 2014 and 19 August 2016 where 298 patients were randomly assigned to receive at least one of the following: one dose of placebo per day, one dose of deutetrabenazine 12 mg/day, one dose of deutetrabenazine 24 mg/day, or one dose of deutetrabenazine 36 mg/day. From baseline to week 12, the least-squares mean AIMS (Abnormal Involuntary Movement Scale) score improved by −3.3 points in the deutetrabenazine 36 mg/day group, −3.2 points in the 24&nbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bioavailability
In pharmacology, bioavailability is a subcategory of absorption and is the fraction (%) of an administered drug that reaches the systemic circulation. By definition, when a medication is administered intravenously, its bioavailability is 100%. However, when a medication is administered via routes other than intravenous, its bioavailability is lower due to intestinal epithelium absorption and first-pass metabolism. Thereby, mathematically, bioavailability equals the ratio of comparing the area under the plasma drug concentration curve versus time (AUC) for the extravascular formulation to the AUC for the intravascular formulation. AUC is used because AUC is proportional to the dose that has entered the systemic circulation. Bioavailability of a drug is an average value; to take population variability into account, deviation range is shown as ±. To ensure that the drug taker who has poor absorption is dosed appropriately, the bottom value of the deviation range is employed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
