57 research outputs found

    1549TiP DeLLphi-303: Phase Ib first-line combination study of tarlatamab, a DLL3-targeting half-life extended bispecific T-cell engager (HLE BiTEĀ®), with carboplatin, etoposide, and PD-L1 inhibition in extensive stage small cell lung cancer (ES-SCLC)

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    Background: The inhibitory Notch ligand, delta-like ligand 3 (DLL3), is a compelling therapeutic target due to its aberrant expression on the cell surface in most small cell lung cancer (SCLC). Tarlatamab (AMG 757) is a half-life extended bispecific T-cell engager (HLE BiTEĀ®) molecule designed to specifically bind DLL3 on target cancer cells and CD3 on T cells, resulting in T cell-dependent killing of tumor cells. Data from an ongoing first-in-human monotherapy study show acceptable safety with evidence of tarlatamab efficacy in patients with relapsed/refractory SCLC (NCT03319940). Adding programmed death ligand 1 (PD-L1) inhibitors to first-line platinum chemotherapy is the emerging standard-of-care (SOC) in ES-SCLC and preclinical data suggests increased antitumor activity of BiTE molecules when combined with PD-1/PD-L1 inhibition or chemotherapy.1 These data support a clinical trial of tarlatamab combined with frontline carboplatin, etoposide, and PD-L1 inhibition in ES-SCLC. Trial design: This is a phase 1b, multicenter, open-label study evaluating tarlatamab in combination with first-line SOC chemo-immunotherapy in subjects with ES-SCLC. Tarlatamab will be evaluated in two separate settings: A) In combination with carboplatin, etoposide, and a PD-L1 inhibitor followed by maintenance cycles of tarlatamab plus PD-L1 inhibitor, and B) In combination with PD-L1 inhibitor following SOC chemo-immunotherapy as a maintenance only approach. Key eligibility criteria include patients with histologically or cytologically confirmed ES-SCLC with no prior systemic treatment (except as specified in protocol) and ECOG performance status ā‰¤1. The primary objective is to evaluate the safety, tolerability, and determine the recommended phase 2 dose and/or maximum tolerated dose of tarlatamab in combination with PD-L1 inhibition with or without chemotherapy. Secondary endpoints are objective response rate, duration of response, disease control, progression-free survival, overall survival, and pharmacokinetics

    Metabolic profiling of HepG2 cells incubated with S(āˆ’) and R(+) enantiomers of anti-coagulating drug warfarin

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    Warfarin is a commonly prescribed oral anticoagulant with narrow therapeutic index. It achieves anti-coagulating effects by interfering with the vitamin K cycle. Warfarin has two enantiomers, S(āˆ’) and R(+) and undergoes stereoselective metabolism, with the S(āˆ’) enantiomer being more effective. We reported the intracellular metabolic profile in HepG2 cells incubated with S(āˆ’) and R(+) warfarin by GCMS. Chemometric method PCA was applied to analyze the individual samples. A total of 80 metabolites which belong to different categories were identified. Two batches of experiments (with and without the presence of vitamin K) were designed. In samples incubated with S(āˆ’) and R(+) warfarin, glucuronic acid showed significantly decreased in cells incubated with R(+) warfarin but not in those incubated with S(āˆ’) warfarin. It may partially explain the lower bio-activity of R(+) warfarin. And arachidonic acid showed increased in cells incubated with S(āˆ’) warfarin but not in those incubated with R(+) warfarin. In addition, a number of small molecules involved in Ī³-glutamyl cycle displayed ratio variations. Intracellular glutathione detection further validated the results. Taken together, our findings provided molecular evidence on a comprehensive metabolic profile on warfarin-cell interaction which may shed new lights on future improvement of warfarin therapy

    Acute lymphoblastic leukemia in persons over the age of 30 yr in the middle east [letter]

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    Human Fibroblast Adhesion to Fibrinogen ā€ 

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    Hematologic Chaos in Lupus Flare: A Case of Fulminant and Simultaneous Antiphospholipid, Anti-ADAMTS13, and Red Blood Cell Autoantibodies

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    Systemic lupus erythematosus may present with several distinct autoimmune phenomena simultaneously. We report a patient presenting with three serious hematologic disorders: thrombotic thrombocytopenic purpura, catastrophic antiphospholipid syndrome, and warm-type IgG red cell autoantibodies. The case is an example of the complex clinical nature of lupus and the importance of accurately identifying individual complications in order to optimize management
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