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https://www.readbyqxmd.com/read/27911437/the-role-of-the-proteasome-in-aml
#1
REVIEW
C M Csizmar, D-H Kim, Z Sachs
Acute myeloid leukemia (AML) is deadly hematologic malignancy. Despite a well-characterized genetic and molecular landscape, targeted therapies for AML have failed to significantly improve clinical outcomes. Over the past decade, proteasome inhibition has been demonstrated to be an effective therapeutic strategy in several hematologic malignancies. Proteasome inhibitors, such as bortezomib and carfilzomib, have become mainstays of treatment for multiple myeloma and mantle cell lymphoma. In light of this success, there has been a surge of literature exploring both the role of the proteasome and the effects of proteasome inhibition in AML...
December 2, 2016: Blood Cancer Journal
https://www.readbyqxmd.com/read/27911276/the-mtor-inhibitor-everolimus-in-combination-with-azacitidine-in-patients-with-relapsed-refractory-acute-myeloid-leukemia-a-phase-ib-ii-study
#2
Peter Tan, Ing Soo Tiong, Shaun Fleming, Giovanna Pomilio, Nik Cummings, Mark Droogleever, Julie McManus, Anthony Schwarer, John Catalano, Sushrut Patil, Sharon Avery, Andrew Spencer, Andrew Wei
Therapeutic options are limited in relapsed/refractory acute myeloid leukemia (AML). We evaluated the maximum tolerated dose (MTD) and preliminary efficacy of mammalian target of rapamycin (mTOR) inhibitor, everolimus (days 5-21) in combination with azacitidine 75 mg/m2 subcutaneously (days 1-5 and 8-9 every 28 days) in 40 patients with relapsed (n = 27), primary refractory (n = 11) or elderly patients unfit for intensive chemotherapy (n = 2). MTD was not reached following everolimus dose escalation (2.5, 5 or 10 mg; n = 19) to the 10 mg dose level which was expanded (n = 21)...
November 29, 2016: Oncotarget
https://www.readbyqxmd.com/read/27911138/phase-1-dose-escalation-study-of-oral-abexinostat-for-the-treatment-of-patients-with-relapsed-refractory-higher-risk-myelodysplastic-syndromes-acute-myeloid-leukemia-or-acute-lymphoblastic-leukemia
#3
Norbert Vey, Thomas Prebet, Claire Thalamas, Aude Charbonnier, Jerome Rey, Ioana Kloos, Emily Liu, Ying Luan, Remus Vezan, Thorsten Graef, Christian Recher
Histone deacetylase (HDAC) inhibitor abexinostat is under investigation for the treatment of various cancers. Epigenetic changes including aberrant HDAC activity are associated with cancers, including myelodysplastic syndromes (MDS), acute myeloid leukemia (AML), and acute lymphoblastic leukemia (ALL). In this phase 1 dose-escalation study, 17 patients with relapsed/refractory higher-risk MDS, AML, or ALL received oral abexinostat (60, 80 [starting dose], 100, or 120 mg) twice daily (bid) on Days 1-14 of 21-day cycles...
December 2, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27911132/a-new-acute-myeloid-leukemia-case-with-stat5b-rara-gene-fusion-due-to-17q21-2-interstitial-deletion
#4
Chiara Pessina, Claudia Basilico, Angelo Genoni, Emanuela Meroni, Lorenzo Elli, Paola Granata, Rossana Righi, Francesco Pallotti, Barbara Mora, Andrea Ferrario, Francesco Passamonti, Rosario Casalone
No abstract text is available yet for this article.
December 2, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27910887/energy-metabolism-regulated-by-hdac-inhibitor-attenuates-cardiac-injury-in-hemorrhagic-rat-model
#5
Qiyuan Kuai, Chunyan Wang, Yanbing Wang, Weijing Li, Gongqing Zhang, Zhixin Qiao, Min He, Xuanlin Wang, Yu Wang, Xingwei Jiang, Lihua Su, Yuezhong He, Suping Ren, Qun Yu
A disturbance of energy metabolism reduces cardiac function in acute severe hemorrhagic patients. Alternatively, adequate energy supply reduces heart failure and increases survival. However, the approach to regulating energy metabolism conductive to vital organs is limited, and the underlying molecular mechanism remains unknown. This study assesses the ability of histone deacetylase inhibitors (HDACIs) to preserve cardiac energy metabolism during lethal hemorrhagic injury. In the lethally hemorrhagic rat and hypoxic myocardial cells, energy metabolism and heart function were well maintained following HDACI treatment, as evident by continuous ATP production with normal cardiac contraction...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910028/recurrent-cytogenetic-abnormalities-in-myeloproliferative-neoplasms-and-chronic-myeloid-leukemia
#6
John Swansbury
The commonest types of myeloproliferative neoplasm (MPN) have remarkably similar recurrent chromosome abnormalities, but with varying incidence and prognostic implications. After a clear decade of treatment of chronic myeloid leukemia (CML) with tyrosine kinase inhibitors, the differing prognostic implications of abnormalities additional to the Ph chromosome are being revealed. This chapter provides a description of the main chromosome abnormalities in MPN and CML and their clinical implications in a time of rapid changes in both the application of new diagnostic techniques and the introduction of targeted therapies...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27910027/recurrent-cytogenetic-abnormalities-in-acute-myeloid-leukemia
#7
John J Yang, Tae Sung Park, Thomas S K Wan
The spectrum of chromosomal abnormality associated with leukemogenesis of acute myeloid leukemia (AML) is broad and heterogeneous when compared to chronic myeloid leukemia and other myeloid neoplasms. Recurrent chromosomal translocations such as t(8;21), t(15;17), and inv(16) are frequently detected, but hundreds of other uncommon chromosomal aberrations from AML also exist. This chapter discusses 22 chromosomal abnormalities that are common structural, numerical aberrations, and other important but infrequent (less than 1 %) translocations emphasized in the WHO classification...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27910009/cancer-cytogenetics-an-introduction
#8
Thomas S K Wan
The Philadelphia chromosome was the first chromosomal abnormality discovered in cancer using the cytogenetics technique in 1960, and was consistently associated with chronic myeloid leukemia. Over the past five decades, innovative technical advances in the field of cancer cytogenetics have greatly enhanced the detection ability of chromosomal alterations, and have facilitated the research and diagnostic potential of chromosomal studies in neoplasms. These developments notwithstanding, chromosome analysis of a single cell is still the easiest way to delineate and understand the relationship between clonal evolution and disease progression of cancer cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27910003/bone-marrow-t-cell-percentage-a-novel-prognostic-indicator-in-acute-myeloid-leukemia
#9
Manar M Ismail, Nahla A B Abdulateef
Acute myeloid leukemia (AML) is an aggressive malignancy for which overall disease-free survival is less than 50%. Manipulation of the immune system is an interesting and promising therapy for AML patients. We aimed to characterize the immune system of AML patients, highlighting the clinical relevance of total bone marrow (BM) lymphocytes and subpopulations. Sixty-six new AML cases diagnosed according to WHO criteria from King Abdullah Medical City, KSA, from October 2012 to February 2015. Analysis of BM lymphocytes and subpopulations was done by flowcytometry...
December 1, 2016: International Journal of Hematology
https://www.readbyqxmd.com/read/27909636/imatinib-induced-ototoxicity-in-a-patient-with-gastrointestinal-stromal-tumor-gist
#10
Komal Wasif, Nawal Wasif, Muhammad W Saif
Imatinib (Gleevec) is a biological agent that is approved for the treatment of chronic myeloid leukemia (CML) as well as gastrointestinal stromal tumor (GIST). The most frequently seen adverse effects in patients treated with imatinib include superficial edema, muscle cramps, musculoskeletal pain, rash, fatigue, headache, abdominal pain, and joint pain. Ototoxicity has rarely been reported except in two cases. We report a case of bilateral irreversible sensorineural hearing loss (SNHL) caused by imatinib in a patient receiving this agent in the adjuvant setting...
October 26, 2016: Curēus
https://www.readbyqxmd.com/read/27909216/molecular-determinants-of-pathogenesis-and-clinical-phenotype-in-myeloproliferative-neoplasms
#11
Jacob Grinfeld, Jyoti Nangalia, Anthony R Green
The myeloproliferative neoplasms are a heterogeneous group of clonal disorders characterised by overproduction of mature cells in the peripheral blood, together with an increased risk of thrombosis and progression to acute myeloid leukemia. The majority of patients with Philadelphia-chromosome negative myeloproliferative neoplasms harbour somatic mutations in Janus kinase 2, leading to constitutive activation. Acquired mutations in calreticulin or myeloproliferative leukemia virus oncogene are found in a significant number of patients with essential thrombocythaemia or myelofibrosis, and mutations in numerous epigenetic regulators and spliceosome components are also seen...
December 1, 2016: Haematologica
https://www.readbyqxmd.com/read/27908881/pre-clinical-studies-of-gilteritinib-a-next-generation-flt3-inhibitor
#12
Lauren Y Lee, Daniela Hernandez, Trivikram Rajkhowa, Samuel C Smith, Jayant Ranganathan Raman, Bao Nguyen, Donald Small, Mark Levis
Activating mutations in the receptor tyrosine kinase FLT3 comprise approximately one-third of genetic lesions in acute myeloid leukemia (AML) and are associated with a poor prognosis. Internal tandem duplication (FLT3-ITD) mutations in particular are associated with a high relapse rate. Although FLT3 tyrosine kinase inhibitors (TKIs) appear to improve clinical outcomes for patients with FLT3-ITD AML, the development of early-generation FLT3 TKIs has been impeded by several obstacles such as low potency and selectivity, myelosuppression, and the emergence of resistance-conferring point mutations...
December 1, 2016: Blood
https://www.readbyqxmd.com/read/27908880/an-anti-cd3-anti-cll-1-bispecific-antibody-for-the-treatment-of-acute-myeloid-leukemia
#13
Steven R Leong, Siddharth Sukumaran, Maria Hristopoulos, Klara Totpal, Shannon Stainton, Elizabeth Lu, Alfred Wong, Lucinda Tam, Robert Newman, Brian R Vuillemenot, Diego Ellerman, Chen Gu, Mary Mathieu, Mark S Dennis, Allen Nguyen, Bing Zheng, Crystal Zhang, Genee Lee, Yu-Waye Chu, Rodney A Prell, Kedan Lin, Steven T Laing, Andrew G Polson
Acute myeloid leukemia (AML) is major unmet medical need. Most patients have poor long-term survival and treatment has not significantly changed in 40 years. Recently, bispecific antibodies that redirect the cytotoxic activity of effector T-cells by binding to CD3, the signaling component of the T-cell receptor, and a tumor target have shown clinical activity. Notably, blinatumomab is approved to treat relapsed/refractory acute lymphoid leukemia. Here we describe the design, discovery, pharmacological activity, pharmacokinetics, and safety of a CD3 T-cell-dependent bispecific (TDB) full-length human IgG1 therapeutic antibody targeting CLL-1 that could potentially be used in humans to treat AML...
December 1, 2016: Blood
https://www.readbyqxmd.com/read/27908756/a-novel-curcumin-derivative-which-inhibits-p-glycoprotein-arrests-cell-cycle-and-induces-apoptosis-in-multidrug-resistance-cells
#14
Vanessa Lopes-Rodrigues, Ana Oliveira, Marta Correia-da-Silva, Madalena Pinto, Raquel T Lima, Emília Sousa, M Helena Vasconcelos
Cancer multidrug resistance (MDR) is a major limitation to the success of cancer treatment and is highly associated with the overexpression of drug efflux pumps such as P-glycoprotein (P-gp). In order to achieve more effective chemotherapeutic treatments, it is important to develop P-gp inhibitors to block/decrease its activity. Curcumin (1) is a secondary metabolite isolated from the turmeric of Curcuma longa L.. Diverse biological activities have been identified for this compound, particularly, MDR modulation in various cancer cell models...
November 19, 2016: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/27908728/activation-of-evi1-transcription-by-the-lef1-%C3%AE-catenin-complex-with-p53-alteration-in-myeloid-blast-crisis-of-chronic-myeloid-leukemia
#15
Nawin Manachai, Yusuke Saito, Shingo Nakahata, Avinash Govind Bahirvani, Tomomi Osato, Kazuhiro Morishita
The presence of a BCR-ABL1 fusion gene is necessary for the pathogenesis of chronic myeloid leukemia (CML) through t(9;22)(q34;q11) translocation. Imatinib, an ABL tyrosine kinase inhibitor, is dramatically effective in CML patients; however, 30% of CML patients will need further treatment due to progression of CML to blastic crisis (BC). Aberrant high expression of ecotropic viral integration site 1 (EVI1) is frequently observed in CML during myeloid-BC as a potent driver with a CML stem cell signature; however, the precise molecular mechanism of EVI1 transcriptional regulation during CML progression is poorly defined...
November 28, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27908660/targeting-of-multiple-senescence-promoting-genes-and-signaling-pathways-by-triptonide-induces-complete-senescence-of-acute-myeloid-leukemia-cells
#16
Yanyan Pan, Mei Meng, Nana Zheng, Zhifei Cao, Ping Yang, Xiaodong Xi, Quansheng Zhou
Leukemia cells aberrantly overexpress senescence-suppression telomerase reverse transcriptase (TERT) and down-regulate key senescence-promoting genes to escape complete senescence, resulting in immortalization and malignant progression. Accordingly, induction of complete senescence is a sensible strategy for anti-leukemia therapy. However, effective senescence-based anti-leukemia drugs with low toxicity are currently lacking. In this study, we found that triptonide (chemical name diterpene triepoxide), a small molecule derived from the herb Tripterygium wilfordii Hook, strongly induced complete senescence in cultured acute myeloid leukemia (AML) cell lines, and potently inhibited growth and colony formation of U937 and HL-60 AML cell line with IC50 values of 7...
November 28, 2016: Biochemical Pharmacology
https://www.readbyqxmd.com/read/27907185/antioxidant-antimicrobial-and-cytotoxic-properties-as-well-as-the-phenolic-content-of-the-extract-from-hancornia-speciosa-gomes
#17
Uilson P Santos, Jaqueline F Campos, Heron Fernandes V Torquato, Edgar Julian Paredes-Gamero, Carlos Alexandre Carollo, Leticia M Estevinho, Kely de Picoli Souza, Edson Lucas Dos Santos
Hancornia speciosa Gomes (Apocynaceae) is a fruit tree, popularly known as mangabeira, and it is widely distributed throughout Brazil. Several parts of the plant are used in folk medicine, and the leaf and bark extracts have anti-inflammatory, antihypertensive, antidiabetic, and antimicrobial properties. In this study, we investigated the chemical composition of the ethanolic extract of Hancornia speciosa leaves (EEHS) and its antioxidant, antimicrobial, and cytotoxic activities as well as the mechanisms involved in cell death...
2016: PloS One
https://www.readbyqxmd.com/read/27907031/in-vitro-pre-clinical-validation-of-suicide-gene-modified-anti-cd33-redirected-chimeric-antigen-receptor-t-cells-for-acute-myeloid-leukemia
#18
Kentaro Minagawa, Muhammad O Jamil, Mustafa Al-Obaidi, Larisa Pereboeva, Donna Salzman, Harry P Erba, Lawrence S Lamb, Ravi Bhatia, Shin Mineishi, Antonio Di Stasi
BACKGROUND: Approximately fifty percent of patients with acute myeloid leukemia can be cured with current therapeutic strategies which include, standard dose chemotherapy for patients at standard risk of relapse as assessed by cytogenetic and molecular analysis, or high-dose chemotherapy with allogeneic hematopoietic stem cell transplant for high-risk patients. Despite allogeneic hematopoietic stem cell transplant about 25% of patients still succumb to disease relapse, therefore, novel strategies are needed to improve the outcome of patients with acute myeloid leukemia...
2016: PloS One
https://www.readbyqxmd.com/read/27906794/health-related-quality-of-life-hr-qol-and-chronic-health-conditions-in-survivors-of-childhood-acute-myeloid-leukemia-aml-with-down-syndrome-ds-a-report-from-the-children-s-oncology-group
#19
Kris Ann P Schultz, Lu Chen, Alicia Kunin-Batson, Zhengjia Chen, William G Woods, Alan Gamis, Toana Kawashima, Kevin C Oeffinger, H Stacy Nicholson, Joseph P Neglia
Survival rates for children with Down syndrome (DS) and acute myeloid leukemia (AML) are high; however, little is known regarding the health-related quality of life (HR-QOL) of these survivors. Individuals who survived ≥5 years following diagnosis of childhood AML were invited to complete parent or patient-report surveys measuring HR-QOL and chronic health conditions. In total, 26 individuals with DS had a median age at diagnosis of 1.8 years (range, 0.77 to 10.9 y) and median age at interview of 15 years (range, 8...
November 30, 2016: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/27906185/anti-proliferative-activity-of-the-npm1-interacting-natural-product-avrainvillamide-in-acute-myeloid-leukemia
#20
Vibeke Andresen, Bjarte S Erikstein, Herschel Mukherjee, André Sulen, Mihaela Popa, Steinar Sørnes, Håkon Reikvam, Kok-Ping Chan, Randi Hovland, Emmet McCormack, Øystein Bruserud, Andrew G Myers, Bjørn T Gjertsen
Mutated nucleophosmin 1 (NPM1) acts as a proto-oncogene and is present in ~30% of patients with acute myeloid leukemia (AML). Here we examined the in vitro and in vivo anti-leukemic activity of the NPM1 and chromosome region maintenance 1 homolog (CRM1) interacting natural product avrainvillamide (AVA) and a fully syntetic AVA analog. The NPM1-mutated cell line OCI-AML3 and normal karyotype primary AML cells with NPM1 mutations were significantly more sensitive towards AVA than cells expressing wild-type (wt) NPM1...
December 1, 2016: Cell Death & Disease
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