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Rifaximin, sold under the brand name Xifaxan among others, is a non-absorbable, broad-spectrum antibiotic mainly used to treat travelers' diarrhea. It is based on the rifamycin antibiotics family. Since its approval in Italy in 1987, it has been licensed in more than 30 countries for the treatment of a variety of non-infectius gastrointestinal ...
The selectivity of the rifamycins depends on the fact that they have a very poor affinity for the analogous mammalian enzyme. Crystal structure data of the antibiotic bound to RNA polymerase indicates that rifamycin blocks synthesis by causing strong steric clashes with the growing oligonucleotide ("steric-occlusion" mechanism).
mTOR inhibitors are a class of drugs used to treat several human diseases, including cancer, autoimmune diseases, and neurodegeneration. They function by inhibiting the mammalian target of rapamycin (mTOR) (also known as the mechanistic target of rapamycin), which is a serine/threonine-specific protein kinase that belongs to the family of phosphatidylinositol-3 kinase (PI3K) related kinases ...
Cetrelimab [5] mab: human: PD-1: cancer Cetuximab [32] Erbitux: mab: chimeric: Epidermal growth factor receptor (EGFR) Y: metastatic colorectal cancer and head and neck cancer: Cibisatamab [5] mab: humanized: CEACAM5: cancer Cilgavimab [29] mab: human: spike protein receptor binding domain (RBD) of SARS-CoV-2: US emergency use authorization ...
The FDA said in its response letter that it needs more data from enrollments in dose-finding and confirmatory portions of trials, delaying its decision on the drug, while confirming no issues with ...
Antagonists will block the binding of an agonist at a receptor molecule, inhibiting the signal produced by a receptor–agonist coupling.. A receptor antagonist is a type of receptor ligand or drug that blocks or dampens a biological response by binding to and blocking a receptor rather than activating it like an agonist.
Targeted covalent inhibitors (TCIs) or Targeted covalent drugs are rationally designed inhibitors that bind and then bond to their target proteins.These inhibitors possess a bond-forming functional group of low chemical reactivity that, following binding to the target protein, is positioned to react rapidly with a proximate nucleophilic residue at the target site to form a bond.
A study showed that when a subject was given 400 mg dose, the amount of unchanged drug in the plasma 2.5 hours postdose suggest a modest first pass effect. The terminal half-life in plasma ranged from 5.4 to 8.6 hours (mean =6.5 hours).