U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

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Showing 81 - 90 of 11950 results

Trametinib is a reversible and specific inhibitor of mitogen-activated protein kinase kinases MEK1 and MEK2 which are involved in a RAS/RAF/MEK/ERK signaling pathway and control cell growth, survival, and differentiation. By inhibiting MEK1 and MEK2 trametinib blocks dual phosphorylation of ERK1/2 and stops cell cycling. In addition, trametinib blocks BRAF pathway in the cells with BRAF V600E mutations. Trametinib (as a single agent and in combination with dabrafenib) is approved for the treatment of unresectable or metastatic melanoma with BRAF V600E or V600K mutations.

Class (Stereo):
CHEMICAL (ABSOLUTE)


Sofosbuvir is a nucleotide analog inhibitor of hepatitis C virus NS5B polymerase - the key enzyme mediating HCV RNA replication. Sofosbuvir is a prodrug and after ingestion it is rapidly converted to GS-331007, the predominant circulating drug that accounts for greater than 90% of the systemically active drug. The compound GS-331007 is efficiently taken up by hepatocytes, whereby cellular kinases convert GS-331007 to its pharmacologically active uridine analog 5’-triphosphate form (GS-461203). This triphosphate compound mimics the natural cellular uridine nucleotide and is incorporated by the HCV RNA polymerase into the elongating RNA primer strand, resulting in chain termination. The active form GS-461203 targets the NS5B catalytic site and acts as a non-obligate chain terminator. The active compound (GS-461203) does not inhibit host DNA polymerases, RNA polymerases, or mitochondrial RNA polymerase. Sofosbuvir (alone or in in combination with other medications) is used to treat Hepatitis C.
Vilanterol (INN, USAN) is an ultra-long-acting β2 adrenoreceptor agonist (ultra-LABA), which was approved in May 2013 in combination with fluticasone furoate for sale as Breo Ellipta by GlaxoSmithKline for the treatment of chronic obstructive pulmonary disease (COPD). Its pharmacological effect is attributable to stimulation of intracellular adenylyl cyclase which catalyzes the conversion of adenosine triphosphate (ATP) to cyclic-3’,5’-adenosine monophosphate (cAMP). Increases in cyclic AMP are associated with relaxation of bronchial smooth muscle and inhibition of release of hypersensitivity mediators from mast cells in the lungs. Vilanterol is available in following combinations: a) with inhaled corticosteroid fluticasone furoate — fluticasone furoate/vilanterol (trade names Breo Ellipta , Relvar Ellipta; b) with muscarinic antagonist umeclidinium bromide — umeclidinium bromide/vilanterol (trade name Anoro Ellipta).

Class (Stereo):
CHEMICAL (ABSOLUTE)



Canagliflozin (INN, trade name Invokana or Sulisent) is a drug of the gliflozin class. It was developed by Mitsubishi Tanabe Pharma and is marketed under license by Janssen, a division of Johnson & Johnson. Canagliflozin is an antidiabetic drug used to improve glycemic control in people with type 2 diabetes. Sodium-glucose co-transporter 2 (SGLT2), expressed in the proximal renal tubules, is responsible for the majority of the reabsorption of filtered glucose from the tubular lumen. Canagliflozin is an inhibitor of SGLT2. By inhibiting SGLT2, canagliflozin reduces reabsorption of filtered glucose and lowers the renal threshold for glucose (RTG), and thereby increases urinary glucose excretion. In extensive clinical trials, canagliflozin produced a consistent dose-dependent reduction in HbA1c of 0.77% to 1.16% when administered as monotherapy, combination with metformin, combination with metformin and a sulfonylurea, combination with metformin and pioglitazone, and in combination with insulin from a baselines of 7.8% to 8.1%, in combination with metformin, or in combination with metformin and a sulfonylurea. When added to metformin, canagliflozin 100 mg was shown to be non-inferior to both sitagliptin 100 mg and glimepiride in reductions on HbA1c at one year, whilst canagliflozin 300 mg successfully demonstrated statistical superiority over both sitagliptin and glimiperide in HbA1c reductions. Secondary efficacy endpoint of superior body weight reduction and blood pressure reduction (versus sitagliptin and glimiperide)) were observed as well. Canagliflozin produces beneficial effects on HDL cholesterol whilst increasing LDL cholesterol to produce no change in total cholesterol.
Umeclidinium (used as a bromide salt) is a long-acting, antimuscarinic antagonist, often referred to as an anticholinergic, developed for the treatment of chronic obstructive pulmonary disease (COPD) (alone and in combination with Vilanterol - long-acting beta2-adrenergic agonist). Umeclidinium has similar affinity to the subtypes of muscarinic receptors M1 to M5 with Ki values of 0.16 nM, 0.15 nM, 0.06 nM, 0.05 nM and 0.13 nM for M1, M2, M3, M4 and M5, respectively. Umeclidinium is selective against mAChR over other unrelated receptors or channels such as κ and σ opiod receptors, Na+ channel and dopamine transporter. In the airways, it exhibits pharmacological effects through the inhibition of M3 receptor at the smooth muscle leading to bronchodilation. There is potential for an additive interaction with concomitantly used anticholinergic medicines.

Class (Stereo):
CHEMICAL (ACHIRAL)



Flutemetamol F 18 is a radioactive molecular agent that is intended for use with PET imaging of the brain in adults being evaluated for Alzheimer's disease (AD) and dementia. Flutemetamol F 18 consists of flutemetamol, a thioflavin derivative of Pittsburgh compound B (PiB) labeled with the radioisotope fluorine F18 and it selectively binds to cerebral fibrillar beta-amyloid, a peptide involved in Alzheimer's disease.
Bazedoxifene acetate (WAY-140424; TSE-424) is an oral, nonsteroidal, indole-based selective estrogen-receptor modulator developed by Ligand Pharmaceuticals in collaboration with Wyeth Pharmaceuticals (NJ, USA) (now Pfizer) . It was developed using raloxifene as a template with the benzothiophene core substituted by an indole ring in order to obtain favorable effects on the skeleton and lipid metabolism with the additional improvement of a neutral effect on hot flushes and without stimulating the uterus or the breast. The drug is approved as a monotherapy for the prevention and treatment of osteoporosis and in combination with conjugated estrogens for the treatment of menopausal symptoms and prevention of osteoporosis. Bazedoxifene binds to both ERalpha and ERbeta with high affinity. Bazedoxifene acts as both a receptor agonist and/or antagonist, depending upon the cell and tissue type and target genes. Bazedoxifene decreases bone resorption and reduces biochemical markers of bone turnover to the premenopausal range. These effects on bone remodeling lead to an increase in bone mineral density (BMD), which in turn contributes to a reduction in the risk of fractures. Bazedoxifene functions primarily as an estrogen-receptor antagonist in uterine and breast tissues.

Class (Stereo):
CHEMICAL (ACHIRAL)



Vismodegib (trade name Erivedge) is a drug for the treatment of basal-cell carcinoma (BCC). It was approved by FDA on January 30, 2012 and by the European Commission on 12 July 2013, for the treatment of adult patients with symptomatic metastatic BCC, or locally advanced BCC inappropriate for surgery or radiotherapy. The drug is also undergoing clinical trials for metastatic colorectal cancer, small-cell lung cancer, advanced stomach cancer, pancreatic cancer, medulloblastoma and chondrosarcoma as of June 2011. The substance acts as a cyclopamine-competitive antagonist of the smoothened receptor (SMO) which is part of the hedgehog signaling pathway. The Hedgehog signaling pathway plays an important role in tissue growth and repair; aberrant constitutive activation of Hedgehog pathway signaling and uncontrolled cellular proliferation may be associated with mutations in the Hedgehog-ligand cell surface receptors PTCH and SMO. SMO inhibition causes the transcription factors GLI1 and GLI2 to remain inactive, which prevents the expression of tumor mediating genes within the hedgehog pathway. This pathway is pathogenetically relevant in more than 90% of basal-cell carcinomas.

Class (Stereo):
CHEMICAL (ABSOLUTE)



Avanafil is a PDE5 inhibitor approved for erectile dysfunction by FDA and by EMA. Avanafil is known by the trademark names Stendra and Spedra and was developed by Vivus Inc. Avanafil selectively inhibits PDE5, thus inhibiting the degradation of cyclic guanosine monophosphate (cGMP) found in the smooth muscle of the corpus cavernosa of the penis. The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the corpus cavernosum during sexual stimulation. NO then activates the enzyme guanylate cyclase, which results in increased levels of cGMP, producing smooth muscle relaxation in the corpus cavernosum and allowing inflow of blood. Avanafil has no direct relaxant effect on isolated human corpus cavernosum, but enhances the effect of NO by inhibiting PDE5, which is responsible for degradation of cGMP in the corpus cavernosum. Because sexual stimulation is required to initiate the local release of nitric oxide, the inhibition of PDE5 has noeffect in the absence of sexual stimulation. The advantage of avanafil is that it has very fast onset of action compared with other PDE5 inhibitors. It is absorbed quickly, reaching a maximum concentration in about 30–45 minutes. About two-thirds of the participants were able to engage in sexual activity within 15 minutes.

Class (Stereo):
CHEMICAL (ABSOLUTE)



Cobicistat (GS-9350) is a potent, and selective inhibitor of human cytochrome P450 3A (CYP3A) enzymes. Cobicistat is a pharmacokinetic booster of several antiretrovirals. TYBOST (cobicistat) is indicated to increase systemic exposure of atazanavir or darunavir in combination with other antiretroviral agents in the treatment of HIV-1 infection.