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Ngu J, Tran D, Rubens F. Effect of Sex on Incidence of Post-Operative Atrial Fibrillation in Cardiac Surgery Patients. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.01.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Pasrija C, Sorensen E, Sawan M, Voorhees H, Tran D, Wang L, DiChiacchio L, Ton V, Feller E, Griffith B, Kon Z, Kaczorowski D. Inflow Cannula Position is Associated with Improvement in Mitral Regurgitation After Left Ventricular Assist Device Implantation. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Cheng Q, Danao J, Talreja S, Wen P, Yin J, Sun N, Li CM, Chui D, Tran D, Koirala S, Chen H, Foltz IN, Wang S, Sambashivan S. TREM2-activating antibodies abrogate the negative pleiotropic effects of the Alzheimer's disease variant Trem2R47H on murine myeloid cell function. J Biol Chem 2018; 293:12620-12633. [PMID: 29599291 DOI: 10.1074/jbc.ra118.001848] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 03/23/2018] [Indexed: 12/28/2022] Open
Abstract
Triggering receptor expressed on myeloid cells 2 (TREM2) is an orphan immune receptor expressed on cells of myeloid lineage such as macrophages and microglia. The rare variant R47H TREM2 is associated with an increased risk for Alzheimer's disease, supporting the hypothesis that TREM2 loss of function may exacerbate disease progression. However, a complete knockout of the TREM2 gene in different genetic models of neurodegenerative diseases has been reported to result in both protective and deleterious effects on disease-related end points and myeloid cell function. Here, we describe a Trem2R47H transgenic mouse model and report that even in the absence of additional genetic perturbations, this variant clearly confers a loss of function on myeloid cells. The Trem2R47H variant-containing myeloid cells exhibited subtle defects in survival and migration and displayed an unexpected dysregulation of cytokine responses in a lipopolysaccharide challenge environment. These subtle phenotypic defects with a gradation in severity across genotypes were confirmed in whole-genome RNA-Seq analyses of WT, Trem2-/-, and Trem2R47H myeloid cells under challenge conditions. Of note, TREM2-activating antibodies that boost proximal signaling abrogated survival defects conferred by the variant and also modulated migration and cytokine responses in an antibody-, ligand-, and challenge-dependent manner. In some instances, these antibodies also boosted WT myeloid cell function. Our studies provide a first glimpse into the boost in myeloid cell function that can be achieved by pharmacological modulation of TREM2 activity that can potentially be ameliorative in neurodegenerative diseases such as Alzheimer's disease.
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MacDonald RJ, Bunaciu RP, Ip V, Dai D, Tran D, Varner JD, Yen A. Src family kinase inhibitor bosutinib enhances retinoic acid-induced differentiation of HL-60 leukemia cells. Leuk Lymphoma 2018; 59:2941-2951. [PMID: 29569971 DOI: 10.1080/10428194.2018.1452213] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The acute promyelocytic leukemia (APL) has been treated with all-trans retinoic acid (RA) for decades. While RA has largely been ineffective in non-APL AML subtypes, co-treatments combining RA and other agents are currently in clinical trials. Using the RA-responsive non-APL AML cell line HL-60, we tested the efficacy of the Src family kinase (SFK) inhibitor bosutinib on RA-induced differentiation. HL-60 has been recently shown to bear fidelity to a subtype of AML that respond to RA. We found that co-treatment with RA and bosutinib enhanced differentiation evidenced by increased CD11b expression, G1/G0 cell cycle arrest, and respiratory burst. Expression of the SFK members Fgr and Lyn was enhanced, while SFK activation was inhibited. Phosphorylation of several sites of c-Raf was increased and expression of AhR and p85 PI3K was enhanced. Expression of c-Cbl and mTOR was decreased. Our study suggests that SFK inhibition enhances RA-induced differentiation and may have therapeutic value in non-APL AML.
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Tran D, Nesbit M, Petridis H. Survey of UK dentists regarding the use of CAD/CAM technology. Br Dent J 2018; 221:639-644. [PMID: 27857080 DOI: 10.1038/sj.bdj.2016.862] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2016] [Indexed: 11/09/2022]
Abstract
Statement of the problem Digital workflows (CAD/CAM) have been introduced in dentistry during recent years. No published information exists on dentists' use and reporting of this technology.Purpose The purpose of this survey was to identify the infiltration of CAD/CAM technology in UK dental practices and to investigate the relationship of various demographic factors to the answers regarding use or non-use of this technology.Materials and methods One thousand and thirty-one online surveys were sent to a sample of UK dentists composing of both users and non-users of CAD/CAM. It aimed to reveal information regarding type of usage, materials, perceived benefits, barriers to access, and disadvantages of CAD/CAM dentistry. Statistical analysis was undertaken to test the influence of various demographic variables such as country of work, dentist experience, level of training and type of work (NHS or private).Results The number of completed responses totalled 385. Most of the respondents did not use any part of a digital workflow, and the main barriers to CAD/CAM use were initial costs and a lack of perceived benefit over conventional methods. Dentists delivering mostly private work were most likely to have adopted CAD/CAM technology (P <0.001). Further training also correlated with a greater likelihood of CAD/CAM usage (P <0.001). Most users felt that the technology had led to a change in the use of dental materials, leading to increased use of, for example, zirconia and lithium disilicate. Most users were trained either by companies or self-trained, and a third felt that their training was insufficient. The majority of respondents (89%) felt that CAD/CAM had a big role to play in the future.Conclusion Most of the respondents did not use any part of a digital workflow. However, the majority of surveyed dentists were interested in incorporating CAD/CAM into their workflow, while most believed that it will have a big role in the future. There are still some concerns from dentists about the quality of chairside CAD/CAM restorations while the costs are still in the main hugely prohibitive (especially for NHS dentistry).
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Tran D, Michelet F, Lelong C, Hans D. TBS Association with Biomechanical Properties of Human Vertebrae, Ex-Vivo. J Clin Densitom 2018. [DOI: 10.1016/j.jocd.2017.10.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Fong AH, Romero-López M, Heylman CM, Keating M, Tran D, Sobrino A, Tran AQ, Pham HH, Fimbres C, Gershon PD, Botvinick EL, George SC, Hughes CCW. Three-Dimensional Adult Cardiac Extracellular Matrix Promotes Maturation of Human Induced Pluripotent Stem Cell-Derived Cardiomyocytes. Tissue Eng Part A 2017; 22:1016-25. [PMID: 27392582 DOI: 10.1089/ten.tea.2016.0027] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
Pluripotent stem cell-derived cardiomyocytes (CMs) have great potential in the development of new therapies for cardiovascular disease. In particular, human induced pluripotent stem cells (iPSCs) may prove especially advantageous due to their pluripotency, their self-renewal potential, and their ability to create patient-specific cell lines. Unfortunately, pluripotent stem cell-derived CMs are immature, with characteristics more closely resembling fetal CMs than adult CMs, and this immaturity has limited their use in drug screening and cell-based therapies. Extracellular matrix (ECM) influences cellular behavior and maturation, as does the geometry of the environment-two-dimensional (2D) versus three-dimensional (3D). We therefore tested the hypothesis that native cardiac ECM and 3D cultures might enhance the maturation of iPSC-derived CMs in vitro. We demonstrate that maturation of iPSC-derived CMs was enhanced when cells were seeded into a 3D cardiac ECM scaffold, compared with 2D culture. 3D cardiac ECM promoted increased expression of calcium-handling genes, Junctin, CaV1.2, NCX1, HCN4, SERCA2a, Triadin, and CASQ2. Consistent with this, we find that iPSC-derived CMs in 3D adult cardiac ECM show increased calcium signaling (amplitude) and kinetics (maximum upstroke and downstroke) compared with cells in 2D. Cells in 3D culture were also more responsive to caffeine, likely reflecting an increased availability of calcium in the sarcoplasmic reticulum. Taken together, these studies provide novel strategies for maturing iPSC-derived CMs that may have applications in drug screening and transplantation therapies to treat heart disease.
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Tran D, Leuthardt E, Shimony J, Kim A, Ansstas G, Campian J. ACTR-82. LASER INTERSTITIAL THERMAL THERAPY (LITT) OF RECURRENT GLIOBLASTOMA (GBM) INDUCES TEMPORARY DISRUPTION OF THE PERITUMORAL BLOOD BRAIN BARRIER (BBB) AND MAY IMPROVE EFFICACY OF CHEMOTHERAPY WITH POOR CNS PENETRATION. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Huang J, Campian J, Gujar A, Tsien C, Ansstas G, Tran D, Dewees T, Kim A, Lockhart AC. ACTR-21. UPDATED RESULTS OF A PHASE I DOSE-ESCALATION, DOSE-EXPANSION STUDY OF DISULFIRAM AND ADJUVANT TEMOZOLOMIDE FOR NEWLY DIAGNOSED GLIOBLASTOMA. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kesari S, Tran D, Read W, Ahluwalia M, Villano J, Toms S, Zhu JJ, Ram Z. ACTR-55. TUMOR TREATING FIELDS WITH SECOND LINE TREATMENT COMPARED TO SECOND LINE TREATMENT ALONE IN PATIENTS AT FIRST RECURRENCE OF GLIOBLASTOMA – A POST HOC ANALYSIS OF THE EF-14 PHASE 3 CLINICAL TRIAL. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tran D, Ghiaseddin A, Campian J, Staal S, Andrews S, Warren S, Ansstas G. ACTR-29. A PHASE 2 STUDY OF TTFIELDS AND PULSED BEVACIZUMAB IN PATIENTS WITH BEVACIZUMAB-REFRACTORY RECURRENT GLIOBLASTOMA. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chen D, Thomas N, Kabbout M, Nguyen-Tran DH, Deng C, Le S, Tran D. TMOD-48. SNAIL1 REGULATES GLIOMAGENESIS INDEPENDENT OF ITS MESENCHYMAL TRANSFORM FUNCTION. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.1084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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113
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Reardon D, Nabors B, Kumthekar P, Badruddoja M, Fink K, Lieberman F, Hu J, Dunbar E, Walbert T, Schiff D, Sherman J, Tran D, Ashby LS, Butowski N, Iwamoto F, Moertel C, Schulder M, Chen J, Bullington J, Shemesh S, Brooks C, Goswami T, Peereboom DM. ATIM-10. PHASE 2 TRIAL OF SL-701, A NOVEL IMMUNOTHERAPY COMPRISED OF SYNTHETIC SHORT PEPTIDES AGAINST GBM TARGETS IL-13Rα2, EphA2, AND SURVIVIN, IN ADULTS WITH SECOND-LINE RECURRENT GBM. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mahlokozera T, Vellimana A, Li T, Mao D, Zohny Z, Kim D, Tran D, Marcus D, Fouke S, Campian J, Dunn G, Miller C, Kim A. GENE-05. IMPLICATIONS OF SPATIAL INTRATUMORAL MUTATIONAL HETEROGENEITY FOR PRECISION MEDICINE-GUIDED TREATMENT IN NEWLY DIAGNOSED GLIOBLASTOMA (GBM). Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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115
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Deng C, Sebastian M, Le S, Chen D, Thomas N, Tran D. STEM-31. TARGETING GLIOBLASTOMA STEM CELLS BY PERTURBING A NOVEL GENE REGULATORY CLUSTER TO REDUCE TUMOR RECURRENCE. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Sebastian M, Deng C, Le S, Thomas N, Tran D. IMMU-07. DIRECT CANCER CELL TO DENDRITIC CELL CONVERSION: A NOVEL IMMUNOTHERAPY FOR GLIOBLASTOMA. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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117
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Campian J, Ghiaseddin A, Rahman M, Ansstas G, Kim A, Leuthardt E, Tran D. ATIM-17. EARLY RESULTS OF A MULTICENTER PHASE I AND OPEN-LABEL, RANDOMIZED PHASE II STUDY TESTING THE TOXICITIES AND EFFICACY OF MK-3475 (PEMBROLIZUMAB) IN COMBINATION WITH MRI-GUIDED LASER INTERSTITIAL THERMAL THERAPY (LITT) IN RECURRENT MALIGNANT GLIOMAS. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox168.112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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118
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Tang S, Koh E, Delaney G, George A, Tran D, Otton J, Thomas L, Holloway L, Liney G. Quantification of Cardiac Subvolume Dosimetry in Breast Cancer Patients Receiving Tangential Beam Radiation Therapy. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tran D, Welsh R, Ohinmaa A, Nguyen T, Kaul P. RELATIVE BURDEN OF HOSPITALIZATION, OUTPATIENT, PHYSICIAN, AND DRUG COSTS IN THE SHORT- AND LONG-TERM AFTER ACUTE MYOCARDIAL INFARCTION. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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120
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Sheldon R, Tran D, Sandhu R, Kaul P. ASSOCIATION OF HOSPITALIZATION WITH FATAL OUTCOMES IN PATIENTS WITH SYNCOPE: A PROPENSITY ANALYSIS. Can J Cardiol 2017. [DOI: 10.1016/j.cjca.2017.07.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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121
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Reidl C, Majorek KA, Dang J, Tran D, Jew K, Law M, Payne Y, Minor W, Becker DP, Kuhn ML. Generating enzyme and radical-mediated bisubstrates as tools for investigating Gcn5-related N-acetyltransferases. FEBS Lett 2017; 591:2348-2361. [PMID: 28703494 PMCID: PMC5578807 DOI: 10.1002/1873-3468.12753] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 07/06/2017] [Accepted: 07/10/2017] [Indexed: 01/07/2023]
Abstract
Gcn5-related N-acetyltransferases (GNATs) are found in all kingdoms of life and catalyze important acyl transfer reactions in diverse cellular processes. While many 3D structures of GNATs have been determined, most do not contain acceptor substrates in their active sites. To expand upon existing crystallographic strategies for improving acceptor-bound GNAT structures, we synthesized peptide substrate analogs and reacted them with CoA in PA4794 protein crystals. We found two separate mechanisms for bisubstrate formation: (a) a novel X-ray induced radical-mediated alkylation of CoA with an alkene peptide and (b) direct alkylation of CoA with a halogenated peptide. Our approach is widely applicable across the GNAT superfamily and can be used to improve the success rate of obtaining liganded structures of other acyltransferases.
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Libman E, Bailes S, Fichten C, Rizzo D, Creti L, Bailes M, Grad R, Tran D, Conrod K, Amsel R. 0817 ADHERENCE TO CPAP TREATMENT IN WOMEN WITH OBSTRUCTIVE SLEEP APNEA. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.816] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Creti L, Rizzo D, Tran D, Fichten C, Bailes S, Libman E. 0824 SLEEP IN THE POSTPARTUM: ACTIGRAPHY AND SLEEP DIARY DATA. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bailes S, Rizzo D, Tran D, Conrod K, Cappozolo B, Baltzan M, Grad R, Pavilanis A, Amsel R, Creti L, Fichten C, Libman E. 0487 WHAT SYMPTOMS MOTIVATE FAMILY MEDICINE PATIENTS TO PURSUE SLEEP APNEA SCREENING? Sleep 2017. [DOI: 10.1093/sleepj/zsx050.486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bondar G, Cadeiras M, Wisniewski N, Esmaeili A, Godoy G, Maque J, Chang E, Bakir M, Kupiec-Weglinski S, Chu D, Bao T, Hai J, Yee R, Li A, Rai M, Tran D, Madrigal L, Togashi R, Ping P, Reed E, Deng M. Leukocyte Time-Dependent Biology and Outcomes in Advanced Heart Failure. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Weller M, Butowski N, Tran D, Recht L, Lim M, Hirte H, Ashby L, Mechtler L, Goldlust S, Iwamoto F, Drappatz J, O’Rourke D, Wong M, Finocchiaro G, Perry J, Wick W, He Y, Davis T, Stupp R, Sampson J. ATIM-03. ACT IV: AN INTERNATIONAL, DOUBLE-BLIND, PHASE 3 TRIAL OF RINDOPEPIMUT IN NEWLY DIAGNOSED, EGFRvIII-EXPRESSING GLIOBLASTOMA. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now212.068] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Reardon D, Peereboom D, Nabors B, Fink K, Phuphanich S, Mikkelsen T, Dunbar E, Badruddoja M, Schiff D, Lieberman F, Tran D, Schulder M, Butowski N, Ashby L, Moertel C, Iwamoto F, Sherman J, Chen J, McDonald P, Poradosu E, Brooks C, Shemesh S, Raizer J. ATIM-11. PHASE 2 TRIAL OF SL-701, A NOVEL IMMUNOTHERAPY COMPRISED OF SYNTHETIC SHORT PEPTIDES AGAINST GBM TARGETS IL-13Rα2, EphA2, AND SURVIVIN, IN ADULTS WITH SECOND-LINE RECURRENT GBM: INTERIM RESULTS. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now212.076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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128
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Paulus A, Akhtar S, Caulfield TR, Samuel K, Yousaf H, Bashir Y, Paulus SM, Tran D, Hudec R, Cogen D, Jiang J, Edenfield B, Novak A, Ansell SM, Witzig T, Martin P, Coleman M, Roy V, Ailawadhi S, Chitta K, Linder S, Chanan-Khan A. Coinhibition of the deubiquitinating enzymes, USP14 and UCHL5, with VLX1570 is lethal to ibrutinib- or bortezomib-resistant Waldenstrom macroglobulinemia tumor cells. Blood Cancer J 2016; 6:e492. [PMID: 27813535 PMCID: PMC5148058 DOI: 10.1038/bcj.2016.93] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 07/21/2016] [Accepted: 08/22/2016] [Indexed: 01/30/2023] Open
Abstract
The survival of Waldenstrom macroglobulinemia (WM) tumor cells hinges on aberrant B-cell receptor (BCR) and MYD88 signaling. WM cells upregulate the proteasome function to sustain the BCR-driven growth while maintaining homeostasis. Clinically, two treatment strategies are used to disrupt these complementary yet mutually exclusive WM survival pathways via ibrutinib (targets BTK/MYD88 node) and bortezomib (targets 20 S proteasome). Despite the success of both agents, WM patients eventually become refractory to treatment, highlighting the adaptive plasticity of WM cells and underscoring the need for development of new therapeutics. Here we provide a comprehensive preclinical report on the anti-WM activity of VLX1570, a novel small-molecule inhibitor of the deubiquitinating enzymes (DUBs), ubiquitin-specific protease 14 (USP14) and ubiquitin carboxyl-terminal hydrolase isozyme L5 (UCHL5). Both DUBs reside in the 19 S proteasome cap and their inhibition by VLX1570 results in rapid and tumor-specific apoptosis in bortezomib- or ibrutinib-resistant WM cells. Notably, treatment of WM cells with VLX1570 downregulated BCR-associated elements BTK, MYD88, NFATC, NF-κB and CXCR4, the latter whose dysregulated function is linked to ibrutinib resistance. VLX1570 administered to WM-xenografted mice resulted in decreased tumor burden and prolonged survival (P=0.0008) compared with vehicle-treated mice. Overall, our report demonstrates significant value in targeting USP14/UCHL5 with VLX1570 in drug-resistant WM and carries a high potential for clinical translation.
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Gujar A, Turski A, Le S, Mao D, Dadey D, Aum D, Luo J, Hallahan D, Tran D, Yano H, Kim A. CSIG-20. IDENTIFICATION OF A NAMPT-E2F2-ID1 SIGNALING AXIS IN GLIOBLASTOMA. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now212.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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130
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Nguyen-Tran DH, Kabbout M, Le S, Tran D. TMOD-22. SNAIL1 REGULATES GLIOMAGENESIS INDEPENDENT OF ITS MESENCHYMAL FUNCTION. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now212.892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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131
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Blackburn DF, Tran D, Quiring C. Evaluation of a refill synchronization program in two community pharmacies. J Am Pharm Assoc (2003) 2016; 56:656-659. [PMID: 27720333 DOI: 10.1016/j.japh.2016.06.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 06/20/2016] [Accepted: 06/24/2016] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To describe medication adherence by the proportion of days covered before and after enrollment in a refill synchronization program. METHODS We conducted a retrospective analysis of medication adherence in 2 pharmacies offering a refill synchronization program. The study population consisted of individuals who received 2 or more medications from any of 15 predefined medication classes within 6 months of enrollment in the synchronization program. Medication adherence and refill consolidation were measured over 6 months before and after enrollment. Optimal adherence was defined as proportion of days covered ≥80%. RESULTS Among 109 patients who enrolled in the program between 2009 and 2014, 68 were included in a pre-post analysis of medication adherence. In the preenrollment period, optimal adherence was observed in 85% (217/254) of the medications taken by the 68 patients, increasing to 93% (237/254) in the postenrollment period (P <0.01). In addition, the percentage maintaining optimal adherence to all of their medications increased significantly from 60% (n = 41) to 83% (n = 57; P <0.01). CONCLUSION Among a small group of patients who voluntarily participated in refill synchronization programs, high levels of medication adherence were observed in the preenrollment period. These results combined with previous studies suggest that voluntary participants of these programs are at a low risk for nonadherence; therefore, current estimates of benefit from refill synchronization programs may be overestimated.
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Jabagi H, Tran D, Glineur D, Rubens F. IS THERE GENDER DISCRIMINATION IN CORONARY REVASCULARIZATION? A SINGLE CENTER RETROSPECTIVE ANALYSIS OF MULTIPLE ARTERIAL CORONARY GRAFTING. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Roston T, Sanatani S, Tran D, Sandhu R, Sheldon R, Kaul P. PREVALENCE AND OUTCOMES OF SYNCOPE IN CHILDREN AND ADOLESCENTS EVALUATED IN CANADIAN EMERGENCY DEPARTMENTS: A POPULATION-BASED STUDY OF 9,830 PATIENTS. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Tran D, Welsh R, Ohinmaa A, Nguyen T, Kaul P. QUALITY OF ACUTE MYOCARDIAL INFARCTION CARE IN CANADA: A 10-YEAR REVIEW OF 30-DAY IN-HOSPITAL MORTALITY AFTER PCI AND CABG. Can J Cardiol 2016. [DOI: 10.1016/j.cjca.2016.07.176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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135
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Nabors LB, Portnow J, Ammirati M, Baehring J, Brem H, Brown P, Butowski N, Chamberlain MC, Fenstermaker RA, Friedman A, Gilbert MR, Hattangadi-Gluth J, Holdhoff M, Junck L, Kaley T, Lawson R, Loeffler JS, Lovely MP, Moots PL, Mrugala MM, Newton HB, Parney I, Raizer JJ, Recht L, Shonka N, Shrieve DC, Sills AK, Swinnen LJ, Tran D, Tran N, Vrionis FD, Weiss S, Wen PY, McMillian N, Engh AM. Central Nervous System Cancers, Version 1.2015. J Natl Compr Canc Netw 2016; 13:1191-202. [PMID: 26483059 DOI: 10.6004/jnccn.2015.0148] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines) for Central Nervous System (CNS) Cancers provide interdisciplinary recommendations for managing adult CNS cancers. Primary and metastatic brain tumors are a heterogeneous group of neoplasms with varied outcomes and management strategies. These NCCN Guidelines Insights summarize the NCCN CNS Cancers Panel's discussion and highlight notable changes in the 2015 update. This article outlines the data and provides insight into panel decisions regarding adjuvant radiation and chemotherapy treatment options for high-risk newly diagnosed low-grade gliomas and glioblastomas. Additionally, it describes the panel's assessment of new data and the ongoing debate regarding the use of alternating electric field therapy for high-grade gliomas.
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Tran D, Podwojewski F, Beillas P, Ottenio M, Voirin D, Turquier F, Mitton D. Abdominal wall muscle elasticity and abdomen local stiffness on healthy volunteers during various physiological activities. J Mech Behav Biomed Mater 2016; 60:451-459. [DOI: 10.1016/j.jmbbm.2016.03.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/19/2016] [Accepted: 03/03/2016] [Indexed: 10/22/2022]
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Gauvain K, Tran D, Rubin J, Shimony J, Campian J, Leuthardt E, Limbrick D. NS-14A PILOT STUDY OF USING MRI-GUIDED LASER HEAT ABLATION TO INDUCE DISRUPTION OF THE PERITUMORAL BLOOD BRAIN BARRIER TO ENHANCE DELIVERY AND EFFICACY OF TREATMENT OF PEDIATRIC BRAIN TUMORS. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now078.14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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138
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Sgro M, Kobylianskii *A, Sankaran K, Tran D, Yudin M, Campbell D. Early Onset Neonatal Sepsis in Canada: 2011-2012. Paediatr Child Health 2016. [DOI: 10.1093/pch/21.supp5.e49a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND: Canadian and US studies suggest that the organisms responsible for early-onset neonatal sepsis (EONS) are changing, with an increase in Escherichia coli (EC) as well as antibiotic-resistant organisms. Current Canadian guidelines for prevention and treatment of EONS are based on Group B streptococcus (GBS) as the likely organism. Population-level data may inform updates to these national strategies.
OBJECTIVES: To determine the incidence, types of organisms and corresponding resistance patterns involved in EONS in Canada. To identify how the organisms are affected by maternal antibiotic prophylaxis and other factors.
DESIGN/METHODS: Cases of EONS (defined as positive blood and/or cerebrospinal fluid (CSF) culture at <7 days of age) between January 2011 and December 2012 were identified through the Canadian Paediatric Surveillance Program (CPSP). Neonates were excluded if they were asymptomatic with a positive culture likely to be a contaminant, or if the CSF culture was positive as a result of an intracranial procedure.
RESULTS: Over the 2-year period, 127 cases meeting our criteria were identified, and there were 754,849 total Canadian live births. The incidence for EONS was 0.17/1000 live births. 79.5% of cases presented within the first 24 hours of life, while 15% presented between 72 h-7 days. GBS accounted for 41.7% of cases, while EC accounted for 35.4%. Resistance was noted in 33.9% of cases overall. 55.6% of EC were resistant, with ampicillin resistance being the most common. The species of infecting organism was significantly associated with gestational age, very low birth weight, age at presentation, the mother having received GBS prophylaxis, and rupture of membranes lasting more than 18 h. GBS was most common in term and EC in preterm neonates. The overall EONS case fatality rate was 11%, with most of these being deaths from EC.
CONCLUSION: Our study suggests a lower rate of EONS than historically suggested, with differing dominant organisms based on gestational ages of the neonates. Later ages at presentation and high rates of resistance especially among EC cases further complicate the picture. We recommend a review of the Canadian prevention and treatment guidelines based on our findings.
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Farrar CA, Tran D, Li K, Wu W, Peng Q, Schwaeble W, Zhou W, Sacks SH. Collectin-11 detects stress-induced L-fucose pattern to trigger renal epithelial injury. J Clin Invest 2016; 126:1911-25. [PMID: 27088797 DOI: 10.1172/jci83000] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 02/24/2016] [Indexed: 12/20/2022] Open
Abstract
Physiochemical stress induces tissue injury as a result of the detection of abnormal molecular patterns by sensory molecules of the innate immune system. Here, we have described how the recently discovered C-type lectin collectin-11 (CL-11, also known as CL-K1 and encoded by COLEC11) recognizes an abnormal pattern of L-fucose on postischemic renal tubule cells and activates a destructive inflammatory response. We found that intrarenal expression of CL-11 rapidly increases in the postischemic period and colocalizes with complement deposited along the basolateral surface of the proximal renal tubule in association with L-fucose, the potential binding ligand for CL-11. Mice with either generalized or kidney-specific deficiency of CL-11 were strongly protected against loss of renal function and tubule injury due to reduced complement deposition. Ex vivo renal tubule cells showed a marked capacity for CL-11 binding that was induced by cell stress under hypoxic or hypothermic conditions and prevented by specific removal of L-fucose. Further analysis revealed that cell-bound CL-11 required the lectin complement pathway-associated protease MASP-2 to trigger complement deposition. Given these results, we conclude that lectin complement pathway activation triggered by ligand-CL-11 interaction in postischemic tissue is a potent source of acute kidney injury and is amenable to sugar-specific blockade.
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Hu Y, Shmygelska A, Tran D, Eriksson N, Tung JY, Hinds DA. GWAS of 89,283 individuals identifies genetic variants associated with self-reporting of being a morning person. Nat Commun 2016; 7:10448. [PMID: 26835600 PMCID: PMC4740817 DOI: 10.1038/ncomms10448] [Citation(s) in RCA: 195] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 12/11/2015] [Indexed: 12/18/2022] Open
Abstract
Circadian rhythms are a nearly universal feature of living organisms and affect almost every biological process. Our innate preference for mornings or evenings is determined by the phase of our circadian rhythms. We conduct a genome-wide association analysis of self-reported morningness, followed by analyses of biological pathways and related phenotypes. We identify 15 significantly associated loci, including seven near established circadian genes (rs12736689 near RGS16, P=7.0 × 10−18; rs9479402 near VIP, P=3.9 × 10−11; rs55694368 near PER2, P=2.6 × 10−9; rs35833281 near HCRTR2, P=3.7 × 10−9; rs11545787 near RASD1, P=1.4 × 10−8; rs11121022 near PER3, P=2.0 × 10−8; rs9565309 near FBXL3, P=3.5 × 10−8. Circadian and phototransduction pathways are enriched in our results. Morningness is associated with insomnia and other sleep phenotypes; and is associated with body mass index and depression but we did not find evidence for a causal relationship in our Mendelian randomization analysis. Our findings reinforce current understanding of circadian biology and will guide future studies. Circadian rhythms and related behaviours vary across individuals. Here, a large genome-wide association study reveals common single nucleotide variants influencing whether an individual reports as being a ‘morning person' by identifying 15 significant loci, including 7 near known circadian genes.
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Lee Y, Tran D, Myhro K, Velasco J, Gillgren N, Poumirol JM, Smirnov D, Barlas Y, Lau CN. Multicomponent Quantum Hall Ferromagnetism and Landau Level Crossing in Rhombohedral Trilayer Graphene. NANO LETTERS 2016; 16:227-231. [PMID: 26636471 DOI: 10.1021/acs.nanolett.5b03574] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Using transport measurements, we investigate multicomponent quantum Hall (QH) ferromagnetism in dual-gated rhombohedral trilayer graphene (r-TLG) in which the real spin, orbital pseudospin, and layer pseudospins of the lowest Landau level form spontaneous ordering. We observe intermediate QH plateaus, indicating a complete lifting of the degeneracy of the zeroth Landau level (LL) in the hole-doped regime. In charge neutral r-TLG, the orbital degeneracy is broken first, and the layer degeneracy is broken last and only in the presence of an interlayer potential U⊥. In the phase space of U⊥ and filling factor ν, we observe an intriguing "hexagon" pattern, which is accounted for by a model based on crossings between symmetry-broken LLs.
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Mansell K, Evans C, Tran D, Sevany S. The association between self-monitoring of blood glucose, hemoglobin A1C and testing patterns in community pharmacies: Results of a pilot study. Can Pharm J (Ott) 2016; 149:28-37. [PMID: 26798375 PMCID: PMC4713892 DOI: 10.1177/1715163515618420] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVES To determine if pharmacists providing advice on self-monitoring of blood glucose (SMBG) to new meter users, based on the Canadian Diabetes Association (CDA) Clinical Practice Guidelines (CPGs), resulted in improvements in A1C. SMBG testing patterns and pharmacist interactions were also observed. METHODS A cluster randomized, pilot study was performed, with pharmacies randomized to an intervention or control group. The intervention group provided SMBG education according to the CDA CPGs at baseline, 2 weeks, 1 month and 3 months; the control group provided usual care. The primary endpoint was the mean change in A1C measured at 6 months. Secondary endpoints included a description of SMBG patterns and lifestyle changes and were determined via a self-administered questionnaire. RESULTS Thirty-six participants (26 intervention, 10 control) were recruited from 9 pharmacies across Saskatchewan, Canada. Mean A1C decreased by -1.69 and -0.70 in the intervention and control groups, respectively (p = 0.376). A total of 12 of 26 (46.2%) participants in the intervention group indicated they performed SMBG ≥7 times per week; 75% (9/12) of these were controlled by lifestyle or metformin alone. When applicable, most participants in the intervention group indicated they perform SMBG with exercise (62.5%), during illness (62.5%) and with hypoglycemic symptoms (81.3%) compared with 33.3%, 42.9% and 42.9% in the control group, respectively. Most participants in the intervention group (20/26; 76.9%) reported making lifestyle changes as a result of speaking with the pharmacist, with all indicating that they maintained these changes at 6 months. CONCLUSIONS The results of this pilot study indicate that a larger study examining pharmacist interventions related to SMBG is feasible. Future studies are required to determine patient motivations and further evaluate the role of pharmacists in ensuring best practices to positively influence guideline-based blood glucose monitoring.
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Cembrowski G, Topping K, Versluys K, Tran D, Malick M, Holmes D, Clarke G. The use of serial outpatient complete blood count (CBC) results to derive biologic variation: a new tool to gauge the acceptability of hematology testing. Int J Lab Hematol 2015; 38:111-8. [DOI: 10.1111/ijlh.12443] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 09/21/2015] [Indexed: 11/30/2022]
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145
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Sader A, Bertrand PM, Moschietto S, Catineau J, Fosse JP, Orban JC, Bèle N, Grech L, Tran D, Danin PE, Dellamonica J. A Multifaceted Programme To Promote Better Living in Icu: Impact On Caregivers' Burnout. Intensive Care Med Exp 2015. [PMCID: PMC4798132 DOI: 10.1186/2197-425x-3-s1-a40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Conrod K, Rizzo D, Tran D, Grad R, Pavilanis A, Bailes S, Creti L, Fichten C, Libman E. The patient' view of CPAP treatment: A preliminary study of patient-reported outcomes. Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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147
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Libman E, Fichten C, Jorgensen M, Tran D, Conrod K, Creti L. What determines perceived sleep quality in people with and without insomnia? Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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148
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Rizzo D, Lavigne G, Creti L, Bergeron J, Baltzan M, Tran D, Controd K, Capozzolo B, Bailes S, Fichten C. Are drivers with OSA getting bad press? Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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149
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Wu J, Puduvalli VK, Yuan Y, Armstrong T, Walker B, Upshaw C, Giglio P, Colman H, Groves MD, Raizer J, Walbert T, Tran D, Avgeropoulos N, Iwamoto F, Peereboom D, Chamberlain M, Merrell R, Paleologos N, Fink K, Gilbert MR. ATCT-34BAYESIAN ADAPTIVE RANDOMIZED PHASE II TRIAL OF BEVACIZUMAB PLUS VORINOSTAT VERSUS BEVACIZUMAB ALONE IN ADULTS WITH RECURRENT GLIOBLASTOMA. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov206.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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150
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White M, Lin A, Rich K, Huang J, Miller-Thomas M, Tran D, Dahiya S. NIMG-73PSEUDOPROGRESSION VERSUS PROGRESSION ON GADOLINIUM-ENHANCED MRI IN OLIGODENDROMAS AND MIXED OLIGOASTROCYTOMAS. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov225.73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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