Malini Dasgupta

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Integrating physicochemical, drug metabolism, pharmacokinetics, ADME, and toxicity assays into drug discovery in order to reduce the attrition rates in clinical development is reviewed. The review is organized around three main decision points used in discovery including hit generation, lead optimization and final candidate selection stages. The preclinical(More)
In addition to matrix effects, common interferences observed in liquid chromatography/tandem mass spectrometry (LC/MS/MS) analyses can be caused by the response of drug-related metabolites to the multiple reaction monitoring (MRM) channel of a given drug, as a result of in-source reactions or decomposition of either phase I or II metabolites. However, it(More)
Pressure on drug discovery teams to predict the success of drug candidates earlier in the drug discovery process has led to the development of in vitro assays using human tissues, cells or fluids that aid chemists and biologists in their decision-making process. The use of human material is often related to the species-specific nature of the enzymatic(More)
Although thrombin has been extensively researched with many examples of potent and selective inhibitors, the key characteristics of oral bioavailability and long half-life have been elusive. We report here a novel series non-peptidic phenyl-based, highly potent, highly selective and orally bioavailable thrombin inhibitors using oxyguanidines as(More)
2-Cyano-6-fluorophenylacetamide was explored as a novel P2 scaffold in the design of thrombin inhibitors. Optimization around this structural motif culminated in 14, which is a potent thrombin inhibitor (K(i)=1.2nM) that exhibits robust efficacy in canine anticoagulation and thrombosis models upon oral administration.
The pharmacokinetics of TDP4815 was evaluated in rats, rabbits, dogs and monkeys. After intravenous administration, TDP4815 achieved C(O) of 3255 ng/ml in rats at 5 mg/kg, 9066 ng/ml in rabbits and 7858 ng/ml in monkeys at 6 mg/kg, and 4457 ng/ml in dogs at 3 mg/kg. The clearance (C(L)) was 3105, 1692, 835 and 640 ml/h/kg in rats, rabbits, monkeys and dogs,(More)
A novel series of potent and selective alpha(v)beta(3)/alpha(v)beta(5) dual( )()inhibitors was designed, synthesized, and evaluated against several integrins. These compounds were synthesized through a Mitsunobu reaction between the guanidinium mimetics and the corresponding central templates. Guanidinium mimetics with enhaced rigidity (i.e.,(More)
Inhibition curve shift is a commonly used approach for screening of time-dependent CYP inhibitors which requires parallel paired incubations to obtain two inhibition curves for comparison. For the control incubation, a test compound is co-incubated with a probe substrate in human liver microsomes (HLM) fortified with NADPH; for the time-dependent incubation(More)
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