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venetoclax

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https://www.readbyqxmd.com/read/29034364/microenvironmental-agonists-generate-de-novo-phenotypic-resistance-to-combined-ibrutinib-plus-venetoclax-in-cll-and-mcl
#1
Kallesh D Jayappa, Craig A Portell, Vicki L Gordon, Brian J Capaldo, Stefan Bekiranov, Mark J Axelrod, L Kyle Brett, Julia D Wulfkuhle, Rosa I Gallagher, Emanuel F Petricoin, Timothy P Bender, Michael E Williams, Michael J Weber
De novo resistance and rapid recurrence often characterize responses of B-cell malignancies to ibrutinib (IBR), indicating a need to develop drug combinations that block compensatory survival signaling and give deeper, more durable responses. To identify such combinations, we previously performed a combinatorial drug screen and identified the Bcl-2 inhibitor venetoclax (VEN) as a promising partner for combination with IBR in Mantle Cell Lymphoma (MCL). We have opened a multi-institutional clinical trial to test this combination...
June 13, 2017: Blood Advances
https://www.readbyqxmd.com/read/29027832/clinical-evaluation-of-p-glycoprotein-inhibition-by-venetoclax-a-drug-interaction-study-with-digoxin
#2
Manoj S Chiney, Rajeev M Menon, Orlando F Bueno, Bo Tong, Ahmed Hamed Salem
1. Venetoclax is a novel, small molecule B-cell lymphoma-2 (BCL-2) inhibitor that has demonstrated clinical efficacy in a variety of haematological malignancies. Since venetoclax is an inhibitor of P glycoprotein (P-gp) transporter, a study was conducted in healthy, female volunteers to evaluate the effect of venetoclax on the pharmacokinetics of digoxin, a P-gp probe substrate. 2. Volunteers received a single oral dose of digoxin (0.5 mg) with or without a single oral dose of venetoclax (100  mg). Serial blood samples were obtained for pharmacokinetic assessments of digoxin and venetoclax and serial urine samples were obtained for measurement of digoxin concentrations...
October 13, 2017: Xenobiotica; the Fate of Foreign Compounds in Biological Systems
https://www.readbyqxmd.com/read/29025288/-state-of-the-art-molecular-diagnostics-and-therapy-of-chronic-lymphocytic-leukaemia-in-the-era-of-new-targeted-therapies
#3
Tímea Gurbity Pálfi, Viktória Fésüs, Csaba Bödör, Zita Borbényi
Chronic lymphoid leukaemia (CLL) has a heterogeneous clinical course depending on many clinical and molecular prognostic markers, which play an important role in the selection of the best treatment option. So far, TP53 disruption is the key prognostic and predictive factor assisting treatment decisions, especially in the era of novel therapies. Asymptomatic patients in early stages of the disease will still benefit from watchful waiting. In the frontline setting, chemoimmunotherapy is still the standard care in the majority of standard risk CLL patients...
October 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29018077/efficacy-of-venetoclax-as-targeted-therapy-for-relapsed-refractory-t-11-14-multiple-myeloma
#4
Shaji Kumar, Jonathan L Kaufman, Cristina Gasparetto, Joseph Mikhael, Ravi Vij, Brigitte Pegourie, Lofti Benboubker, Thierry Facon, Martine Amiot, Philippe Moreau, Elizabeth A Punnoose, Stefanie Alzate, Martin Dunbar, Tu Xu, Suresh K Agarwal, Sari Heitner Enschede, Joel D Leverson, Jeremy A Ross, Paulo C Maciag, Maria Verdugo, Cyrille Touzeau
Venetoclax is a selective, orally bioavailable BCL-2 inhibitor that induces cell death in MM cells, particularly in those harboring t(11;14), which express high levels of BCL-2 relative to BCL-XL and MCL-1. In this phase I study, patients with relapsed/refractory MM received venetoclax monotherapy. After a 2-week lead-in with weekly dose escalation, daily venetoclax was given at 300, 600, 900, or 1200 mg in dose-escalation cohorts and 1200 mg in the safety expansion. Dexamethasone could be added upon progression during treatment...
October 10, 2017: Blood
https://www.readbyqxmd.com/read/29017053/apoptosis-up-the-ante
#5
Palaniraja Thandapani, Iannis Aifantis
The clinical success of the BH3-mimetic venetoclax has generated increasing interest to target BCL2 family proteins in oncology. In this issue of Cancer Cell, Reyna and colleagues demonstrate the potential of a pharmacological activator of the pro-apoptotic protein BAX to suppress acute myeloid leukemia both alone and together with venetoclax.
October 9, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28993217/mechanistic-pbpk-modeling-of-the-dissolution-and-food-effect-of-a-bcs-iv-compound-the-venetoclax-story
#6
Arian Emami Riedmaier, David J Lindley, Jeffrey A Hall, Steven Castleberry, Russell T Slade, Patricia Stuart, Robert A Carr, Thomas B Borchardt, Daniel A J Bow, Marjoleen Nijsen
PURPOSE: Venetoclax, a selective B-cell lymphoma-2 inhibitor, is a biopharmaceutics classification system (BCS) class IV compound. The aim of this study was to develop a physiologically-based pharmacokinetic (PBPK) model to mechanistically describe absorption and disposition of an amorphous solid dispersion (ASD) formulation of venetoclax in humans. METHODS: A mechanistic PBPK model was developed incorporating measured amorphous solubility, dissolution, metabolism and plasma protein binding...
October 6, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28984869/bcl2-and-mir-15-16-from-gene-discovery-to-treatment
#7
REVIEW
Yuri Pekarsky, Veronica Balatti, Carlo M Croce
In 1984, we investigated the t(14;18) chromosomal translocations that frequently occur in patients with follicular lymphoma. We first identified a locus on chromosome 18 involved in these translocations with the chromosome 14 containing the immunoglobulin heavy chain locus. Within this region on chromosome 18, we then discovered a gene that we called BCL2, which was activated by the translocations. Since that time, many studies determined that BCL2 is one of the most important oncogenes involved in cancer by inhibiting apoptosis...
October 6, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28978838/chronic-lymphocytic-leukemia-biology-disease-progression-and-current-treatment-strategies
#8
Takahiro Yano
Chronic lymphocytic leukemia (CLL) is characterized by clonal proliferation and accumulation of mature CD5-positive, CD10-negative, CD20 weakly positive, and CD23-positive B-cells within blood, bone marrow, lymph nodes, and spleen. In proliferation centers, the survival and growth of CLL cells requires a permissive microenvironment comprising T-cells, macrophages, and stromal cells. FISH analysis has revealed that almost 80% of CLL cases carry chromosomal abnormalities including the most frequent del (13q14) and the strongest poor prognostic factor del (17p), both related to TP53 mutations...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28972395/venetoclax-for-the-treatment-of-chronic-lymphocytic-leukemia
#9
Massimo Gentile, Annamaria Petrungaro, Giuseppina Uccello, Ernesto Vigna, Anna Grazia Recchia, Nadia Caruso, Sabrina Bossio, Laura De Stefano, Angela Palummo, Francesca Storino, Massimo Martino, Fortunato Morabito
Venetoclax, an orally bioavailable inhibitor of BCL-2, was approved in 2016 by the United States Food and Drug Administration (FDA) for the treatment of chronic lymphocytic leukemia (CLL) patients with 17p deletion [del(17p)], who have received at least one prior therapy. Areas covered: We focus on the mechanism of action of venetoclax and on the clinical trial data that led to the approval of venetoclax for CLL patients. We also review the studies in which this drug has being explored in combination with other anti-CLL drugs...
November 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28972015/synergy-of-bcl2-and-histone-deacetylase-inhibition-against-leukemic-cells-from-cutaneous-t-cell-lymphoma-patients
#10
Benoit M Cyrenne, Julia Lewis, Jason Weed, Kacie Carlson, Fatima N Mirza, Francine Foss, Michael Girardi
The presence and degree of peripheral blood involvement in patients with cutaneous T-cell lymphoma (CTCL) portend a worse clinical outcome. Available systemic therapies for CTCL may variably decrease tumor burden and improve quality of life, but offer limited effects on survival; thus, novel approaches to the treatment of advanced stages of this non-Hodgkin lymphoma are clearly warranted. Mutational analyses of CTCL patient peripheral blood malignant cell samples suggested the anti-apoptotic mediator BCL2 as a potential therapeutic target...
October 2, 2017: Blood
https://www.readbyqxmd.com/read/28972014/first-in-human-response-of-bcl-2-inhibitor-venetoclax-in-t-cell-prolymphocytic-leukemia
#11
Bernd Boidol, Christoph Kornauth, Emiel van der Kouwe, Nicole Prutsch, Lukas Kazianka, Sinan Gültekin, Gregor Hoermann, Marius E Mayerhoefer, Georg Hopfinger, Alexander Hauswirth, Michael Panny, Marie-Bernadette Aretin, Bernadette Hilgarth, Wolfgang R Sperr, Peter Valent, Ingrid Simonitsch-Klupp, Richard Moriggl, Olaf Merkel, Lukas Kenner, Ulrich Jäger, Stefan Kubicek, Philipp B Staber
T-cell prolymphocytic leukemia (T-PLL) is a rare and aggressive T-lymphoid malignancy usually refractory to current treatment strategies and associated with a short overall survival. By applying next-generation functional testing of primary patient-derived lymphoma cells using a library of 106 FDA-approved anti-cancer drugs or compounds currently in clinical development we pursued to identify novel effective treatments for T-PLL patients. We found that the BCL-2 inhibitor venetoclax (ABT-199) demonstrated the strongest T-PLL specific response when comparing individual ex vivo drug response in 86 patients with refractory hematologic malignancies...
September 27, 2017: Blood
https://www.readbyqxmd.com/read/28945711/venetoclax-management-and-care-for-patients-with-relapsed-or-refractory-chronic-lymphocytic-leukemia%C3%A2
#12
Heather Brumbaugh Paradis, Debbie Alter, Diane Llerandi
BACKGROUND: Venetoclax (Venclexta™) is a potent, selective, orally available, small-molecule B-cell lymphoma 2 inhibitor that achieves response rates of about 80% and has an acceptable safety profile for patients with relapsed or refractory chronic lymphocytic leukemia (CLL).
. OBJECTIVES: The aim was to describe treatment management considerations when caring for patients using venetoclax.
. METHODS: A review was done of safety and management considerations based on current clinical practice and 240 patients with CLL who received venetoclax monotherapy on clinical trials from 2011-2016...
October 1, 2017: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/28942659/novel-synthetic-drugs-currently-in-clinical-development-for-chronic-lymphocytic-leukemia
#13
Pawel Robak, Tadeusz Robak
Over the last few years, several new synthetic drugs, particularly Bruton's tyrosine kinase (BTK), phosphatidylinositol 3-kinase (PI3K) and BCL-2 inhibitors have been developed and investigated in chronic lymphocytic leukemia (CLL). Areas covered: This review highlights key aspects of BTK, PI3K and BCL-2 inhibitors that are currently at various stages of preclinical and clinical development in CLL. A literature review of the MEDLINE database for articles in English concerning CLL, B-cell receptor, BCL-2 antagonists, BTK inhibitors and PI3K inhibitors, was conducted via PubMed...
November 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28915653/dual-targeting-of-mdm2-and-bcl2-as-a-therapeutic-strategy-in-neuroblastoma
#14
Alan Van Goethem, Nurten Yigit, Myrthala Moreno-Smith, Sanjeev A Vasudevan, Eveline Barbieri, Frank Speleman, Jason Shohet, Jo Vandesompele, Tom Van Maerken
Wild-type p53 tumor suppressor activity in neuroblastoma tumors is hampered by increased MDM2 activity, making selective MDM2 antagonists an attractive therapeutic strategy for this childhood malignancy. Since monotherapy in cancer is generally not providing long-lasting clinical responses, we here aimed to identify small molecule drugs that synergize with idasanutlin (RG7388). To this purpose we evaluated 15 targeted drugs in combination with idasanutlin in three p53 wild type neuroblastoma cell lines and identified the BCL2 inhibitor venetoclax (ABT-199) as a promising interaction partner...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28914567/chemotherapy-free-triple-combination-of-obinutuzumab-venetoclax-and-idasanutlin-antitumor-activity-in-xenograft-models-of-non-hodgkin-lymphoma
#15
Frank Herting, Thomas Friess, Pablo Umaña, Steven Middleton, Christian Klein
No abstract text is available yet for this article.
September 15, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28851760/tumor-lysis-syndrome-in-chronic-lymphocytic-leukemia-with-novel-targeted-agents
#16
Bruce D Cheson, Sari Heitner Enschede, Elisa Cerri, Monali Desai, Jalaja Potluri, Nicole Lamanna, Constantine Tam
Tumor lysis syndrome (TLS) is an uncommon but potentially life-threatening complication associated with the treatment of some cancers. If left untreated, TLS may result in acute renal failure, cardiac dysrhythmia, neurologic complications, seizures, or death. Tumor lysis syndrome is most commonly observed in patients with hematologic malignancies with a high proliferation rate undergoing treatment with very effective therapies. In chronic lymphocytic leukemia (CLL), historically, TLS has been observed less often, owing to a low proliferation rate and slow response to chemotherapy...
August 29, 2017: Oncologist
https://www.readbyqxmd.com/read/28838268/rational-combination-strategies-to-enhance-venetoclax-activity-and-overcome-resistance-in-hematologic-malignancies
#17
Steven Grant
Venetoclax (ABT-199) is a Bcl-2-specific BH3-mimetic that has shown significant promise in certain subtypes of CLL as well as in several other hematologic malignancies. As in the case of essentially all targeted agents, intrinsic or acquired resistance to this agent generally occurs, prompting the search for new strategies capable of circumventing this problem. A logical approach to this challenge involves rational combination strategies designed to disable preexisting or induced compensatory survival pathways...
August 24, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28837922/development-of-glut4-selective-antagonists-for-multiple-myeloma-therapy
#18
Changyong Wei, Richa Bajpai, Horrick Sharma, Monique Heitmeier, Atul D Jain, Shannon M Matulis, Ajay K Nooka, Rama K Mishra, Paul W Hruz, Gary E Schiltz, Mala Shanmugam
Cancer cells consume more glucose to fuel metabolic programs fundamental to sustaining their survival, growth and proliferation. Among the fourteen SLC2A family members, GLUTs 1 and 4 are high-affinity glucose transporters. GLUT4 (SLC2A4) is highly expressed in muscle and adipose tissue. Basally retained within the cell, GLUT4 traffics to the plasma membrane (PM) in response to insulin and exercise-stimulation. The plasma cell malignancy multiple myeloma (MM) exhibits increased constitutive expression of GLUT4 on the PM, co-opting use of GLUT4 for survival and proliferation...
October 20, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28835351/emerging-therapeutic-modalities-for-acute-myeloid-leukemia-aml-in-older-adults
#19
Li-Wen Huang, Rebecca L Olin
Treatment for the older adult with acute myeloid leukemia (AML) is challenging, due to both more aggressive disease biology as well as patient-related risk factors that limit tolerance of intensive chemotherapy. The use of prognostic models and comprehensive geriatric assessments can help hematologists evaluate the suitability of intensive chemotherapy for individual patients. For older patients considered fit for intensive chemotherapy, standard induction therapy should be given, followed by consideration of reduced intensity allogeneic stem cell transplantation...
August 20, 2017: Journal of Geriatric Oncology
https://www.readbyqxmd.com/read/28826693/chimeric-antigen-receptor-t-cell-therapy-for-chronic-lymphocytic-leukemia-a-narrative-review
#20
REVIEW
Anthony R Mato, Meghan C Thompson, Chadi Nabhan, Jakub Svoboda, Stephen J Schuster
The treatment landscape for chronic lymphocytic leukemia (CLL) is changing rapidly. Novel targeted agents such as ibrutinib, venetoclax, and idelalisib have had a significant effect on first-line, relapsed/refractory, and high-risk disease. Despite these advances, there are continuous needs for new treatment options, especially for patients in whom these novel therapies fail or those who cannot tolerate these novel therapies. In 2011, Porter et al reported the first successful use of autologous chimeric antigen receptor T cells (CARTs) directed against cluster of differentiation (CD)19 in 3 refractory CLL patients...
July 21, 2017: Clinical Lymphoma, Myeloma & Leukemia
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