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https://www.readbyqxmd.com/read/29241222/flavopiridol-enhances-abt-199-sensitivity-in-unfavourable-risk-multiple-myeloma-cells-in-vitro-and-in-vivo
#1
Liang Zhou, Yu Zhang, Deepak Sampath, Joel Leverson, Yun Dai, Maciej Kmieciak, Matthew Nguyen, Robert Z Orlowski, Steven Grant
BACKGROUND: The BCL-2-specific BH3-mimetic ABT-199 (venetoclax) has been reported to be principally active against favourable-risk multiple myeloma (MM) cells, prompting efforts to extend its activity to include more resistant, higher-risk MM subsets. METHODS: Effects of the CDK9 inhibitor flavopiridol (FP; alvocidib) on responses to ABT-199 were examined in MM cells. Cell death and protein expression were evaluated by western blot and immunofluorescence. Xenograft models were used to study combination effects in vivo...
December 14, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29222670/venetoclax-for-treating-chronic-lymphocytic-leukaemia-an-evidence-review-group-perspective-of-a-nice-single-technology-appraisal
#2
REVIEW
Hema Mistry, Chidozie Nduka, Martin Connock, Jill Colquitt, Theodoros Mantopoulos, Emma Loveman, Renata Walewska, James Mason
Venetoclax is licensed to treat relapsed or refractory (R/R) chronic lymphocytic leukaemia (CLL). As part of the Single Technology Appraisal (STA) ID944, the National Institute for Health and Care Excellence (NICE) invited AbbVie, the manufacturer, to submit evidence on the use of venetoclax, within its licensed indication. The Evidence Review Group (ERG), Warwick Evidence, was asked to provide an independent and critical review of the submitted evidence. Evidence came from three single-arm trials in CLL patients with or without 17p deletion [del(17p])/TP53 chromosomal abnormalities...
December 8, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/29222277/how-should-we-sequence-and-combine-novel-therapies-in-cll
#3
REVIEW
Matthew S Davids
With the recent approval of several effective and well-tolerated novel agents (NAs), including ibrutinib, idelalisib, venetoclax, and obinutuzumab, patients with chronic lymphocytic leukemia (CLL) have more therapeutic options than ever before. The availability of these agents is both an important advance for patients but also a challenge for practicing hematologist/oncologists to learn how best to sequence NAs, both with respect to chemoimmunotherapy (CIT) and to other NAs. The sequencing of NAs in clinical practice should be guided both by an individual patient's prognostic markers, such as FISH and immunoglobulin heavy chain variable region (IGHV)-mutation status, as well as the patient's medical comorbidities and goals of care...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29222275/the-mutational-landscape-of-chronic-lymphocytic-leukemia-and-its-impact-on-prognosis-and-treatment
#4
REVIEW
Gianluca Gaidano, Davide Rossi
The typical genome of chronic lymphocytic leukemia (CLL) carries ∼2000 molecular lesions. Few mutations recur across patients at a frequency >5%, whereas a large number of biologically and clinically uncharacterized genes are mutated at lower frequency. Approximately 80% of CLL patients carry at least 1 of 4 common chromosomal alterations, namely deletion 13q14, deletion 11q22-23, deletion 17p12, and trisomy 12. Knowledge of the CLL genome has translated into the availability of molecular biomarkers for prognosis and treatment prediction...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29218851/clinical-experience-with-the-bcl2-inhibitor-venetoclax-in-combination-therapy-for-relapsed-and-refractory-acute-myeloid-leukemia-and-related-myeloid-malignancies
#5
Courtney D DiNardo, Caitlin R Rausch, Christopher Benton, Tapan Kadia, Nitin Jain, Naveen Pemmaraju, Naval Daver, Wendy Covert, Kayleigh R Marx, Morgan Mace, Elias Jabbour, Jorge Cortes, Guillermo Garcia-Manero, Farhad Ravandi, Kapil N Bhalla, Hagop Kantarjian, Marina Konopleva
INTRODUCTION: Venetoclax (VEN), a selective BCL2 inhibitor, has single-agent activity in relapsed and refractory (R/R) acute myeloid leukemia (AML) and efficacy in lower-intensity combinations for treatment-naïve elderly AML patients. VEN treatment combinations in R/R AML have not been previously reported. METHODS: All R/R myeloid patients (including AML, myelodysplastic syndrome (MDS), and blastic plasmacytoid dendritic cell neoplasm (BPDCN)) treated with VEN combinations in the salvage setting were reviewed...
December 8, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/29217697/t-pll-another-check-on-the-venetoclax-list
#6
Prithviraj Bose, Marina Y Konopleva
No abstract text is available yet for this article.
December 7, 2017: Blood
https://www.readbyqxmd.com/read/29146569/found-in-translation-how-preclinical-research-is-guiding-the-clinical-development-of-the-bcl2-selective-inhibitor-venetoclax
#7
REVIEW
Joel D Leverson, Deepak Sampath, Andrew J Souers, Saul H Rosenberg, Wayne J Fairbrother, Martine Amiot, Marina Konopleva, Anthony Letai
Since the discovery of apoptosis as a form of programmed cell death, targeting the apoptosis pathway to induce cancer cell death has been a high-priority goal for cancer therapy. After decades of effort, drug-discovery scientists have succeeded in generating small-molecule inhibitors of antiapoptotic BCL2 family proteins. Innovative medicinal chemistry and structure-based drug design, coupled with a strong fundamental understanding of BCL2 biology, were essential to the development of BH3 mimetics such as the BCL2-selective inhibitor venetoclax...
November 16, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/29126866/advances-in-diagnosis-and-management-of-diffuse-large-b-cell-lymphoma
#8
REVIEW
Fernando Cabanillas, Bijal Shah
The management of diffuse large B-cell lymphoma (DLBCL) has been gradually evolving since the discovery of its 2 major forms, the germinal center B-like (GCB) and activated B-cell (ABC) types. Although the reference standard for the identification of these cell types is considered gene expression profiling (GEP), currently the only method commercially available is immunohistochemistry (IHC). The application of various IHC-based algorithms and their correlation with GEP and clinical outcome are discussed. Because of the adverse prognostic implications of the non-GCB type and its potential effects on treatment selection, the recently revised World Health Organization classification has included these biologic cell types...
December 2017: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/29125406/bruton-s-tyrosine-kinase-inhibitors-first-and-second-generation-agents-for-patients-with-chronic-lymphocytic-leukemia-cll
#9
Philip A Thompson, Jan A Burger
The BTK inhibitor ibrutinib is effective in both low- and high-risk CLL patients, achieving durable remissions with continuous therapy in the majority of patients. Ibrutinib lacks myelotoxicity and is generally well tolerated by older and unfit patients; however, side effects, such as atrial fibrillation or hemorrhage, can result in treatment interruption or discontinuation. Given the high efficacy and overall safety, ibrutinib is increasingly used in untreated and previously treated CLL patients. Second-generation BTK inhibitors are being developed, with different and generally more BTK-selective kinase inhibition profiles, which may increase the safety and/or efficacy...
November 10, 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/29118061/venetoclax-is-effective-in-small-cell-lung-cancers-with-high-bcl-2-expression
#10
Timothy L Lochmann, Konstantinos V Floros, Mitra Naseri, Krista M Powell, Wade Cook, Ryan J March, Giovanna T Stein, Patricia Greninger, Yuki Kato Maves, Laura R Saunders, Scott J Dylla, Carlotta Costa, Sosipatros A Boikos, Joel D Leverson, Andrew J Souers, Geoffrey W Krystal, Hisashi Harada, Cyril H Benes, Anthony C Faber
PURPOSE:  Small cell lung cancer (SCLC) is an often-fatal neuroendocrine carcinoma usually presenting as extensive disease, carrying a 3% five-year survival. Despite notable advances in SCLC genomics, new therapies remain elusive, largely due to a lack of druggable targets. EXPERIMENTAL DESIGN:  We used a high-throughput drug screen to identify a venetoclax sensitive SCLC sub-population, and validated the findings with multiple patient-derived xenografts of SCLC...
November 8, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29099493/pharmacodynamics-and-proteomic-analysis-of-acalabrutinib-therapy-similarity-of-on-target-effects-to-ibrutinib-and-rationale-for-combination-therapy
#11
V K Patel, B Lamothe, M L Ayres, J Gay, J Cheung, K Balakrishnan, C Ivan, J Morse, M Nelson, M J Keating, W G Wierda, J R Marszalek, V Gandhi
Acalabrutinib, a highly selective Bruton's tyrosine kinase inhibitor, is associated with high overall response rates and durable remission in previously treated chronic lymphocytic leukemia (CLL), however, complete remissions were limited. To elucidate on-target and pharmacodynamic effects of acalabrutinib, we evaluated several laboratory endpoints, including proteomic changes, chemokine modulation, and impact on cell migration. Pharmacological profiling of samples from acalabrutinib-treated CLL patients was used to identify strategies for achieving deeper responses, and to identify additive/synergistic combination regimens...
November 3, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29099483/the-bcl-2-arbiters-of-apoptosis-and-their-growing-role-as-cancer-targets
#12
REVIEW
Jerry M Adams, Suzanne Cory
Impaired apoptosis plays a central role in cancer development and limits the efficacy of conventional cytotoxic therapies. Deepening understanding of how opposing factions of the BCL-2 protein family switch on apoptosis and of their structures has driven development of a new class of cancer drugs that targets various pro-survival members by mimicking their natural inhibitors, the BH3-only proteins. These 'BH3 mimetic' drugs seem destined to become powerful new weapons in the arsenal against cancer. Successful clinical trials of venetoclax/ABT-199, a specific inhibitor of BCL-2, have led to its approval for a refractory form of chronic lymphocytic leukaemia and to scores of on-going trials for other malignancies...
November 3, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29097160/clinical-practice-guidelines-for-diagnosis-and-treatment-of-chronic-lymphocytic-leukemia-cll-in-the-netherlands
#13
Sabina Kersting, Suzanne I M Neppelenbroek, Hein P J Visser, Michel van Gelder, Mark-David Levin, Rogier Mous, Ward Posthuma, Hanneke M van der Straaten, Arnon P Kater
INTRODUCTION: In recent years, considerable progress has been made in the treatment of patients with chronic lymphocytic leukemia (CLL), and new potent drugs have become available. Therefore, the CLL working party revised the Dutch guidelines. Not only efficacy but also quality of life and socio-economic impact were taken into account in the formulation of treatment recommendations. MATERIALS AND METHODS: The working party discussed a set of questions regarding diagnostic tests and treatment and wrote the draft guideline...
September 25, 2017: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/29066507/pqr309-is-a-novel-dual-pi3k-mtor-inhibitor-with-pre-clinical-antitumor-activity-in-lymphomas-as-a-single-agent-and-in-combination-therapy
#14
Chiara Tarantelli, Eugenio Gaudio, Alberto Jesus Arribas, Ivo Kwee, Petra Hillmann, Andrea Rinaldi, Luciano Cascione, Filippo Spriano, Elena Bernasconi, Francesca Guidetti, Laura Carrassa, Roberta Bordone Pittau, Florent Beaufils, Reto Ritschard, Denise Rageot, Alexander Sele, Barbara Dossena, Francesca M Rossi, Antonella Zucchetto, Monica Taborelli, Valter Gattei, Davide Rossi, Anastasios Stathis, Georg Stussi, Massimo Broggini, Matthias P Wymann, Andreas Wicki, Emanuele Zucca, Vladimir Cmiljanovic, Doriano Fabbro, Francesco Bertoni
PURPOSE: Activation of the PI3K/mTOR signaling pathway is recurrent in different lymphoma types and pharmacological inhibition of the PI3K/mTOR pathway has shown activity in lymphoma patients. Here, we extensively characterized the in vitro and in vivo activity and the mechanism of action of PQR309 (bimiralisib), a novel oral selective dual PI3K/mTOR inhibitor under clinical evaluation, in preclinical lymphoma models. EXPERIMENTAL DESIGN: This study included preclinical in vitro activity screening on a large panel of cell lines, both as single agent and in combination, validation experiments on in vivo models and primary cells, proteomics and gene expression profiling and comparison with other signaling inhibitors...
October 24, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29064593/combination-therapy-incorporating-bcl-2-inhibition-with-venetoclax-for-the-treatment-of-refractory-primary-plasma-cell-leukemia-with-t-11-14
#15
Wilson I Gonsalves, Francis K Buadi, Shaji K Kumar
Primary plasma cell leukemia (pPCL) is the most aggressive form of the plasma cell (PC) malignancy, multiple myeloma (MM). It has been commonly associated with the presence of a chromosome translocation involving the immunoglobulin heavy chain (IgH) locus on 14q32, i.e. t (11;14). Results from early phase clinical trials utilizing the selective bcl-2 inhibitor, venetoclax, as a single agent in patients with relapsed MM have had remarkable efficacy among patients with t (11;14) abnormality. The present case demonstrates the ability of a combination regimen incorporating bcl-2 inhibition with daratumumab, bortezomib, venetoclax and dexamethasone to induce a rapid and very deep hematologic response in a pPCL patient with t (11;14), even in a setting of very refractory disease...
October 24, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/29063177/approach-to-richter-transformation-of-chronic-lymphocytic-leukemia-in-the-era-of-novel-therapies
#16
REVIEW
Maliha Khan, Rabbia Siddiqi, Philip A Thompson
Chronic lymphocytic leukemia (CLL) has a highly variable clinical course. About 2-10% of CLL patients develop aggressive histological transformation, most commonly to diffuse large B cell lymphoma (DLBCL), historically called Richter transformation (RT). Clinical features suggestive of RT include elevated LDH and non-specific symptoms such as fever, weight loss, and lymphadenopathy. 18-fluorodeoxyglucose (18-FDG) uptake is increased on PET scan (standardized uptake value max most commonly ≥ 10). PET/CT study can identify optimal site for excisional biopsy, which is the gold standard for RT diagnosis, as well as aid in disease staging and prognostication...
October 23, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/29061914/therapeutics-targeting-bcl-2-in-hematological-malignancies
#17
REVIEW
Astrid Ruefli-Brasse, John C Reed
Members of the B-cell lymphoma 2 (BCL-2) gene family are attractive targets for cancer therapy as they play a key role in promoting cell survival, a long-since established hallmark of cancer. Clinical utility for selective inhibition of specific anti-apoptotic Bcl-2 family proteins has recently been realized with the Food and Drug Administration (FDA) approval of venetoclax (formerly ABT-199/GDC-0199) in relapsed chronic lymphocytic leukemia (CLL) with 17p deletion. Despite the impressive monotherapy activity in CLL, such responses have rarely been observed in other B-cell malignancies, and preclinical data suggest that combination therapies will be needed in other indications...
October 23, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29058801/pharmacokinetics-of-the-bcl-2-inhibitor-venetoclax-in-healthy-chinese-subjects
#18
Tommy T Cheung, Ahmed Hamed Salem, Rajeev M Menon, Wijith P Munasinghe, Orlando F Bueno, Suresh K Agarwal
Venetoclax has been approved in the United States, Europe, Canada, and Australia for appropriate patients with difficult-to-treat chronic lymphocytic leukemia (CLL). The objective of this phase 1 study was to evaluate the pharmacokinetics of venetoclax in Chinese subjects to inform the dose selection of venetoclax in a phase 2 study of patients with relapsed/refractory (R/R) CLL in China. Twelve healthy first-generation Han Chinese subjects received a single 100-mg dose of venetoclax following a low-fat breakfast...
October 23, 2017: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/29051180/midostaurin-enasidenib-cpx-351-gemtuzumab-ozogomycin-and-venetoclax-bring-new-hope-to-aml
#19
Andrew H Wei, Ing S Tiong
In 2017, four new drugs have so far received FDA marketing approval for the treatment of acute myeloid leukemia (AML), including targeted therapies for mutant FLT3 (midostaurin) and IDH2 (enasidenib), a novel liposomal cytarabine-daunorubicin formulation (CPX-351) for therapy-related AML and AML with myelodysplasia-related changes and finally, resurgence of an antibody-drug conjugate designed to target CD33 (gemtuzumab ozogomycin; GO). Promising results also emerged for the BCL-2 inhibitor venetoclax combined with low-intensity therapy in older patients with AML unfit for intensive chemotherapy...
October 19, 2017: Blood
https://www.readbyqxmd.com/read/29034364/microenvironmental-agonists-generate-de-novo-phenotypic-resistance-to-combined-ibrutinib-plus-venetoclax-in-cll-and-mcl
#20
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
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