Srikumar Sahasranaman

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The thiopurine drugs—azathioprine (AZA), 6-mercaptopurine (6-MP), and thioguanine—are widely used to treat malignancies, rheumatic diseases, dermatologic conditions, inflammatory bowel disease, and solid organ transplant rejection. However, thiopurine drugs have a relatively narrow therapeutic index and are capable of causing life-threatening toxicity, most(More)
Overactivity of glutamatergic transmission has been implicated in Parkinson's disease (PD) and levodopa (L-Dopa)-induced dyskinesias. Striatal metabotropic glutamate receptors type 5 (mGluR5) are abundant and provide specific targets to modulate glutamatergic activity. This study investigated the acute effects of the novel mGluR5 antagonist AFQ056 on motor(More)
We evaluated the safety and biologic activity of the BH3 mimetic protein, navitoclax, combined with rituximab, in comparison to rituximab alone. One hundred and eighteen patients with chronic lymphocytic leukemia (CLL) were randomized to receive eight weekly doses of rituximab (arm A), eight weekly doses of rituximab plus daily navitoclax for 12 weeks (arm(More)
Antibody-drug conjugates (ADCs) are a unique class of therapeutic proteins with both small and large molecular components. In vivo, ADCs are processed to multiple clinically relevant analytes, each with distinct PK properties. This increases the complexity for ADC drug interaction (DI) assessment. Furthermore, given the usually narrow therapeutic range for(More)
Purpose: Chk1 inhibition potentiates DNA-damaging chemotherapy by overriding cell-cycle arrest and genome repair. This phase I study evaluated the Chk1 inhibitor GDC-0425 given in combination with gemcitabine to patients with advanced solid tumors.Experimental Design: Patients received GDC-0425 alone for a 1-week lead-in followed by 21-day cycles of(More)
Activating the immune system to eliminate cancer cells and produce clinically relevant responses has been a long-standing goal of cancer research. Most promising therapeutic approaches to activating antitumor immunity include immune checkpoint inhibitors. Immune checkpoints are numerous inhibitory pathways hardwired in the immune system. They are critical(More)
The recent failures of cholesteryl ester transport protein inhibitor drugs to decrease CVD risk, despite raising HDL cholesterol (HDL-C) levels, suggest that pharmacologic increases in HDL-C may not always reflect elevations in reverse cholesterol transport (RCT), the process by which HDL is believed to exert its beneficial effects. HDL-modulating therapies(More)
Ciclesonide is a novel and effective inhaled corticosteroid for the treatment of asthma that is converted into the active metabolite C21-desisobutyryl-ciclesonide (des-CIC) in the lung. The objectives of this analysis were to characterize covariate effects on des-CIC pharmacokinetics (PK) and circadian cortisol release. In addition, the effect of systemic(More)
A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of GDC-0425 concentrations in human plasma has been developed and validated. Supported liquid extraction was used to extract plasma samples (50 μL) and the resulting samples were analyzed using reverse-phase chromatography and mass spectrometry coupled with a(More)
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