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Autophagy leukemia

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https://www.readbyqxmd.com/read/28105213/wogonin-induces-beclin-1-pi3k-and-reactive-oxygen-species-mediated-autophagy-in-human-pancreatic-cancer-cells
#1
Shao-Jun Li, Shi-Jie Sun, Jie Gao, Fu-Bo Sun
Wogonin is considered to be an inhibitor of myeloid cell leukemia 1 and B-cell lymphoma 2, and a potential antitumor drug due to its ability to induce apoptosis in certain cancer cells; however, few previous studies have reported on wogonin-induced autophagy. The aim of the present study was to investigate the influence of wogonin on autophagy in human pancreatic cancer cells (HPCCs), elucidate its mechanism, and identify strategies to increase its effectiveness as an anti-cancer treatment. HPCCs were treated with wogonin and autophagy was detected in the cells...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28094938/in-vitro-and-in-vivo-evaluation-of-fully-substituted-5-3-ethoxy-3-oxopropynyl-4-ethoxycarbonyl-1-2-3-triazolyl-glycosides-as-original-nucleoside-analogs-to-circumvent-resistance-in-myeloid-malignancies
#2
Hella Amdouni, Guillaume Robert, Mohsine Driowya, Nathan Furstoss, Camille Métier, Alix Dubois, Maeva Dufies, Marwa Zerhouni, François Orange, Sandra Lacas-Gervais, Khalid Bougrin, Anthony R Martin, Patrick Auberger, Rachid Benhida
A series of nucleoside analogs bearing a 1,4,5-trisubstituted-1,2,3-triazole aglycone was synthesized using a straightforward click/electrophilic addition or click/oxidative coupling tandem procedures. SAR analysis, using cell culture assays, led to the discovery of a series of compounds belonging to the 5-alkynyl-1,2,3-triazole family that exhibits potent antileukemic effects on several hematologic malignancies including chronic myeloid leukemia (CML) and myelodysplastic syndromes (MDS) either sensitive or resistant to their respective therapy...
January 17, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28071754/far-infrared-protects-vascular-endothelial-cells-from-advanced-glycation-end-products-induced-injury-via-plzf-mediated-autophagy-in-diabetic-mice
#3
Cheng-Hsien Chen, Tso-Hsiao Chen, Mei-Yi Wu, Tz-Chong Chou, Jia-Rung Chen, Meng-Jun Wei, San-Liang Lee, Li-Yu Hong, Cai-Mei Zheng, I-Jen Chiu, Yuh-Feng Lin, Ching-Min Hsu, Yung-Ho Hsu
The accumulation of advanced glycation end products (AGEs) in diabetic patients induces vascular endothelial injury. Promyelocytic leukemia zinc finger protein (PLZF) is a transcription factor that can be activated by low-temperature far-infrared (FIR) irradiation to exert beneficial effects on the vascular endothelium. In the present study, we investigated the influence of FIR-induced PLZF activation on AGE-induced endothelial injury both in vitro and in vivo. FIR irradiation inhibited AGE-induced apoptosis in human umbilical vein endothelial cells (HUVECs)...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28024518/-role-of-autophagy-in-acute-lymphoblastic-leukemia-review
#4
Qiong Liao, Xia Ren, Guo-Sheng Jiang
Autophagy is an evolutionarily highly conservative lysosomal degradative process and closely associates with pathogenesis, process, treatment, drug resistance and relapse of acute lymphoblastic leukemia (ALL). Whether the autophagy displays resistance to chemotherapy or a tumor suppressor in ALL, it mainly depends on the context of autophagy in the cells. Understanding the different role of autophagy in different conditions for ALL, determing the autophagy signaling pathways and targeting combination with autophagy revulsants or inhibitors were significant for the therapy of ALL, particularly for the treatment of refractory/relapsed ALL patients...
December 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28024474/-hnrnp-k-contributes-to-adriamycin-resistance-in-acute-myeloid-leukemia-through-regulating-autophagy
#5
Jin-Fang Zhang, Xiao-Li Liu, Yu-Deng Lin, Yu-Ling Li, Jian-Wei Pan, Sa Zong, Yang Zhou
OBJECTIVE: To explore the role of heterogeneous nuclear ribonucleoprotein(hnRNP) K regulating autophagy in the drug resistance of acute myeloid leukemia, so as to provide a new molecular marker for treatment of leukemia. METHODS: The relationship between the expression level of hnRNP K and the drug resistance of myeloid leukemia was verified by fluorescence quantitative PCR; the expression of autophagy related protein LC3I/ II was detected by Western blot after the hnRNP K was modulated by RNA interference technology; the sensitivity of leukemia cells to doxorubicin was analyzed before and after the expression of hnRNP K were modulatd...
December 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/27965050/the-optimal-dose-of-arsenic-trioxide-induced-opposite-efficacy-in-autophagy-between-k562-cells-and-their-initiating-cells-to-eradicate-human-myelogenous-leukemia
#6
Zhenzhen Guo, Mingjing Meng, Shengnan Geng, Zhenhua Du, Yaqiu Zheng, Jingjing Yao, Zibo Li, Guang Han, Haihong Lin, Gangjun Du
ETHNOPHARMACOLOGICAL RELEVANCE: Arsenic trioxide (As2O3), a main component of arsenolite which is a common traditional Chinese medicine (TCM) wildly used as a therapeutic agent for more than 2400 years in china, has been accepted as a standard treatment for the patients with acute promyelocytic leukemia (APL) based on the principle in TCM of "using a poison to fight against other poisons or malignancy illnesses". However, it remains unknown that which mechanism is actually responsible for the therapeutic effects against these blood malignancies...
January 20, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27956388/autophagy-a-key-mechanism-of-oncogenesis-and-resistance-in-leukemia
#7
Patrick Auberger, Alexandre Puissant
Autophagy is a lysosomal pathway involved in degradation of intracellular material. It appears as an adaptation mechanism that is essential for cellular homeostasis in response to various stress conditions. Over the past decade, many studies have linked alteration of autophagy with cancer initiation and progression, autoimmune, inflammatory, metabolic, and degenerative diseases. This review highlights recent findings on the impact of autophagy on leukemic transformation of normal hematopoietic stem cells and summarizes its role on leukemic cell response to chemotherapy...
December 12, 2016: Blood
https://www.readbyqxmd.com/read/27927647/gvhd-prevents-nk-cell-dependent-leukemia-and-virus-specific-innate-immunity
#8
Mark D Bunting, Antiopi Varelias, Fernando Souza-Fonseca-Guimaraes, Iona S Schuster, Katie E Lineburg, Rachel D Kuns, Peter Fleming, Kelly R Locke, Nicholas D Huntington, Bruce R Blazar, Steven W Lane, Siok-Keen Tey, Kelli P A MacDonald, Mark J Smyth, Mariapia A Degli-Esposti, Geoffrey R Hill
Allogeneic bone marrow transplantation (allo-BMT) is a curative therapy for hematological malignancies, but is associated with significant complications, principally graft-versus-host disease (GVHD) and opportunistic infections. Natural killer (NK) cells mediate important innate immunity that provides a temporal bridge until the reconstruction of adaptive immunity. Here we show that the development of GVHD after allo-BMT prevented NK-cell reconstitution, particularly within the maturing M1 and M2 NK-cell subsets in association with exaggerated activation, apoptosis and autophagy...
December 7, 2016: Blood
https://www.readbyqxmd.com/read/27911437/the-role-of-the-proteasome-in-aml
#9
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/27902471/autophagy-autophagy-associated-adaptive-immune-responses-and-its-role-in-hematologic-malignancies
#10
REVIEW
Liangshun You, Shenhe Jin, Li Zhu, Wenbin Qian
Autophagy is a tightly regulated catabolic process that leads to the degradation of cytoplasmatic components such as aggregated/misfolded proteins and organelles through the lysosomal machinery. Recent studies suggest that autophagy plays such a role in the context of the anti-tumor immune response, make it an attractive target for cancer immunotherapy. Defective autophagy in hematopoietic stem cells may contribute to the development of hematologic malignancies, including leukemia, myelodysplastic syndrome, and lymphoproliferative disorder...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27884749/celecoxib-exerts-antitumor-effects-in-hl-60-acute-leukemia-cells-and-inhibits-autophagy-by-affecting-lysosome-function
#11
Ying Lu, Xiang-Fu Liu, Ting-Rong Liu, Rui-Fang Fan, Yi-Chuan Xu, Xiang-Zhong Zhang, Ling-Ling Liu
Celecoxib, a selective cyclooxygenase-2 (COX-2) inhibitor, has been demonstrated to exert antitumor activity in a variety of cancer cells. The underlying mechanism involves inhibition of cell cycle progression and induction of apoptosis. Besides, celecoxib has also been found to induce autophagy in some solid tumor cells. The aim of this study was to investigate the effect of celecoxib on cell proliferation in HL-60 human acute leukemia cells and to explore the potential mechanism. HL-60 cells were exposed to various concentrations of celecoxib and cell viability was evaluated by the MTT assay...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27864418/ampk-ulk1-mediated-autophagy-confers-resistance-to-bet-inhibitor-jq1-in-acute-myeloid-leukemia-stem-cells
#12
Ji Eun Jang, Ju In Eom, Hoi Kyung Jeung, June-Won Cheong, Jung Yeon Lee, Jin Seok Kim, Yoo Hong Min
PURPOSE: Bromodomain and extraterminal domain (BET) inhibitors are promising epigenetic agents for the treatment of various subsets of acute myeloid leukemia (AML). However, the resistance of leukemia stem cells (LSCs) to BET inhibitors remains a major challenge. In this study, we evaluated the mechanisms underlying LSC resistance to the BET inhibitor JQ1. EXPERIMENTAL DESIGN: We evaluated the levels of apoptosis and autophagy induced by JQ1 in LSC-like leukemia cell lines and primary CD34(+)CD38(-) leukemic blasts obtained from AML cases with normal karyotype without recurrent mutations...
November 18, 2016: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/27853367/caveolin-1-contributes-to-realgar-nanoparticle-therapy-in-human-chronic-myelogenous-leukemia-k562-cells
#13
Dan Shi, Yan Liu, Ronggang Xi, Wei Zou, Lijun Wu, Zhiran Zhang, Zhongyang Liu, Chao Qu, Baoli Xu, Xiaobo Wang
Chronic myelogenous leukemia (CML) is characterized by the t(9;22) (q34;q11)-associated Bcr-Abl fusion gene, which is an essential element of clinical diagnosis. As a traditional Chinese medicine, realgar has been widely used for the treatment of various diseases for >1,500 years. Inspired by nano-drug, realgar nanoparticles (NPs) have been prepared with an average particle size of <100 nm in a previous work. Compared with coarse realgar, the realgar NPs have higher bioavailability. As a principal constituent protein of caveolae, caveolin-1 (Cav-1) participates in regulating various cellular physiological and pathological processes including tumorigenesis and tumor development...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27852045/different-bcr-abl-protein-suppression-patterns-as-a-converging-trait-of-chronic-myeloid-leukemia-cell-adaptation-to-energy-restriction
#14
Silvia Bono, Matteo Lulli, Vito Giuseppe D'Agostino, Federico Di Gesualdo, Rosa Loffredo, Maria Grazia Cipolleschi, Alessandro Provenzani, Elisabetta Rovida, Persio Dello Sbarba
BCR/Abl protein drives the onset and progression of Chronic Myeloid Leukemia (CML). We previously showed that BCR/Abl protein is suppressed in low oxygen, where viable cells retain stem cell potential. This study addressed the regulation of BCR/Abl protein expression under oxygen or glucose shortage, characteristic of the in vivo environment where cells resistant to tyrosine kinase inhibitors (TKi) persist. We investigated, at transcriptional, translational and post-translational level, the mechanisms involved in BCR/Abl suppression in K562 and KCL22 CML cells...
November 12, 2016: Oncotarget
https://www.readbyqxmd.com/read/27848186/dasatinib-induces-autophagy-in-mice-with-bcr-abl-positive-leukemia
#15
Makiko Morita, Yoko Nishinaka, Itaru Kato, Satoshi Saida, Hidefumi Hiramatsu, Yasuhiko Kamikubo, Toshio Heike, Tatsutoshi Nakahata, Souichi Adachi
Dasatinib, a second-generation tyrosine kinase inhibitor, is a highly effective treatment for Bcr-Abl-positive leukemia. However, the mechanism by which dasatinib induces cell death is unclear, particularly in vivo. Autophagy is a lysosomal degradation mechanism essential for cell survival and differentiation. Autophagy also protects cells from the effects of drugs, including those used to treat leukemia. Here, we report that dasatinib induces autophagy in Bcr-Abl-positive leukemia cell lines and further show the induction of autophagy in an immunodeficient mouse model of human Bcr-Abl-positive leukemia with central nervous system (CNS) infiltration...
November 15, 2016: International Journal of Hematology
https://www.readbyqxmd.com/read/27821800/synergistic-effects-of-selective-inhibitors-targeting-the-pi3k-akt-mtor-pathway-or-nup214-abl1-fusion-protein-in-human-acute-lymphoblastic-leukemia
#16
Carolina Simioni, Simona Ultimo, Alberto M Martelli, Giorgio Zauli, Daniela Milani, James A McCubrey, Silvano Capitani, Luca M Neri
Philadelphia chromosome-positive (Ph+) Acute Lymphoblastic Leukemia (ALL) accounts for 25-30% of adult ALL and its incidence increases with age in adults >40 years old. Irrespective of age, the ABL1 fusion genes are markers of poor prognosis and amplification of the NUP214-ABL1 oncogene can be detected mainly in patients with T-ALL. T cell malignancies harboring the ABL1 fusion genes are sensitive to many cytotoxic agents, but up to date complete remissions have not been achieved. The PI3K/Akt/mTOR signaling pathway is often activated in leukemias and plays a crucial role in leukemogenesis...
November 3, 2016: Oncotarget
https://www.readbyqxmd.com/read/27817185/pharmacologic-inhibition-of-autophagy-sensitizes-human-acute-leukemia-jurkat-t-cells-to-acacetin-induced-apoptosis
#17
Ji Young Lee, Do Youn Jun, Ki Yun Kim, Eun Ji Ha, Mi Hee Woo, Jee Youn Ko, Young Ho Yun, In-Seok Oh, Young Ho Kim
Exposure of Jurkat T cell clone (J/Neo cells) to acacetin (5,7-dihydroxy-4'-methoxyflavone), which is present in barnyard millet [Echinochloa esculenta (A. Braun)] grains, resulted in cytotoxicity, accumulation of apoptotic sub-G1 cells, Bak activation, loss of mitochondrial membrane potential (Δψm), activation of caspase-9 and caspase-3, cleavage of poly (ADP-ribose) polymerase (PARP), and FITC-Annexin V-stainable phosphatidylserine exposure on the external surface of the cytoplasmic membrane without accompanying necrosis...
November 4, 2016: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/27797294/targeting-autophagy-to-overcome-chemoresistance-in-acute-myleogenous-leukemia
#18
Sujan Piya, Michael Andreeff, Gautam Borthakur
Therapeutic inhibition of macroautophagy/autophagy is expected to increase chemosensitivity of cancers and alter tumor-stroma interdependence. The hypoxic, metabolically challenged bone marrow microenvironment confers chemoresistance to leukemia cells. The impact of autophagy inhibition in the context of microenvironment-mediated resistance in leukemia is less explored. Our recent studies demonstrated that co-culture of acute myelogenous leukemia (AML) cells with marrow-derived mesenchymal stromal cells (MSC) induces autophagy in AML cells and increases resistance to genotoxic agents (cytarabine and idarubicin)...
January 2, 2017: Autophagy
https://www.readbyqxmd.com/read/27773925/complete-mutational-spectrum-of-the-autophagy-interactome-a-novel-class-of-tumor-suppressor-genes-in-myeloid-neoplasms
#19
V Visconte, B Przychodzen, Y Han, S T Nawrocki, S Thota, K R Kelly, B J Patel, C Hirsch, A S Advani, H E Carraway, M A Sekeres, J P Maciejewski, J S Carew
Leukemia accepted article preview online, 24 October 2016. doi:10.1038/leu.2016.295.
October 24, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27761809/detection-of-autophagy-induction-after-hdac-inhibitor-treatment-in-leukemic-cells
#20
Anja Göder, Nisintha Mahendrarajah, Oliver H Krämer
Autophagy is a lysosome-dependent, intracellular pathway for the recycling of cellular components. It plays a pivotal role in both cancer development and the response to chemotherapy. Here we describe how autophagy can be monitored in living cells by flow cytometry using the cationic amphiphilic tracer dye Cyto-ID(®) Green. The detection of autophagy induction in the human leukemia cell line K562 after the treatment with the HDAC class I inhibitor MS-275 serves as an example for this approach.
2017: Methods in Molecular Biology
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