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B-cell lymphoma

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https://www.readbyqxmd.com/read/29244783/using-a-commonly-down-regulated-cytomegalovirus-cmv-promoter-for-high-level-expression-of-ectopic-gene-in-a-human-b-lymphoma-cell-line
#1
Xiaojun Yu, Wei Geng, Hongchuan Zhao, Guobin Wang, Yijun Zhao, Zhe Zhu, Xiaoping Geng
BACKGROUND Vectors are widely used to drive gene expression using a promoter. However, not all promoters are able to drive ectopic gene expression efficiently, including CMV promoter. Here, we report our data using CMV promoter for high-level gene expression in a B lymphoma cell line DG75. MATERIAL AND METHODS A plasmid (pcDNA3.1(+)) containing the CD21 gene driven under CMV promoter was constructed. The plasmid was stably transfected into a human B lymphoma cell line DG75 for cellular surface CD21 expression, and flow cytometry was used to monitor CD21 expression...
December 15, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29243778/apatinib-resensitizes-cisplatin-resistant-non-small-cell-lung-carcinoma-a549-cell-through-reversing-multidrug-resistance-and-suppressing-erk-signaling-pathway
#2
Z-L Liu, B-J Jin, C-G Cheng, F-X Zhang, S-W Wang, Y Wang, B Wu
OBJECTIVE: To observe the reversal effect of apatinib on the resistance to cisplatin (DDP) of A549/cisplatin (A549/DDP) cells and its relevant mechanism. MATERIALS AND METHODS: A549/DDP cells were treated with the control method, apatinib alone, DDP alone and DDP combined with apatinib. The cell proliferation was detected by the 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and the cell clone formation assay. The cell apoptosis was detected by Hoechst 33258 staining and annexin V and propidium iodide (PI) double labeling...
December 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29243771/role-of-bcl-2-and-bax-in-parotid-gland-atrophy
#3
J-H Zuo, C-H Sun, H Gao, L-F Wang, Y-H Zhu
OBJECTIVE: To investigate the expression and correlation of B-cell lymphoma-2 (Bcl-2) and Bax in the parotid gland after leading duct ligation in rat. MATERIALS AND METHODS: Atrophy of the right parotid was induced by ligating the right Stensen's duct of rats. Immunohistochemical labeling was performed to study the changes in number and distribution of Bcl-2 and Bax in each step of glandular atrophy, and every group at 1, 3, 5, 7, 14, 21, 30, 60, 90, 150, 180 days after ligation...
December 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29242506/micrornas-regulate-key-cell-survival-pathways-and-mediate-chemosensitivity-during-progression-of-diffuse-large-b-cell-lymphoma
#4
Suvi-Katri Leivonen, Katherine Icay, Kirsi Jäntti, Ilari Siren, Chengyu Liu, Amjad Alkodsi, Alejandra Cervera, Maja Ludvigsen, Stephen Jacques Hamilton-Dutoit, Francesco d'Amore, Marja-Liisa Karjalainen-Lindsberg, Jan Delabie, Harald Holte, Rainer Lehtonen, Sampsa Hautaniemi, Sirpa Leppä
Despite better therapeutic options and improved survival of diffuse large B-cell lymphoma (DLBCL), 30-40% of the patients experience relapse or have primary refractory disease with a dismal prognosis. To identify biological correlates for treatment resistance, we profiled microRNAs (miRNAs) of matched primary and relapsed DLBCL by next-generation sequencing. Altogether 492 miRNAs were expressed in the DLBCL samples. Thirteen miRNAs showed significant differential expression between primary and relapse specimen pairs...
December 15, 2017: Blood Cancer Journal
https://www.readbyqxmd.com/read/29242403/does-pet-reconstruction-method-affect-deauville-scoring-in-lymphoma-patients
#5
Blandine Enilorac, Charline Lasnon, Cathy Nganoa, Christophe Fruchart, Anne Claire Gac, Gandhi Damaj, Nicolas Aide
Background: When scoring 18F-Fluorodeoxyglucose (FDG) positron emission tomography (PET) with the Deauville scale (DS), the quantification of tumor and reference organs limits the problem of optical misinterpretation. Compared to conventional reconstruction algorithms, point spread function (PSF) modeling significantly increases standardized uptake values (SUVs) in tumors but only moderately in the liver, which could affect the DS. We investigated whether the choice of the reconstruction algorithm affects the DS and whether discordances affect the capability of FDG PET to stratify lymphoma patients...
December 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29242300/blood-cytokine-concentrations-of-pediatric-anaplastic-lymphoma-kinase-positive-anaplastic-large-cell-lymphoma-patients
#6
Fabian Knörr, Christine Damm-Welk, Stephanie Ruf, Vijay Kumar Singh, Martin Zimmermann, Alfred Reiter, Wilhelm Woessmann
Patients with anaplastic lymphoma kinase -positive anaplastic large cell lymphoma often present with B-symptoms or hemophagocytosis and generate an anti-tumor immune response. Specific serum cytokine levels or profiles may reflect the tumor burden, an unspecific immune stimulation by the tumor or differences in the strength of the patient's anti-lymphoma immunity. We systematically correlated pre-treatment concentrations of 25 cytokines with clinical and biological characteristics in a well characterized cohort of 119 uniformly treated pediatric anaplastic large cell lymphoma patients...
December 14, 2017: Haematologica
https://www.readbyqxmd.com/read/29242296/promising-activity-of-selinexor-in-the-treatment-of-a-patient-with-refractory-diffuse-large-b-cell-lymphoma-and-central-nervous-system-involvement
#7
Sabela Bobillo, Pau Abrisqueta, Cecilia Carpio, Priyanka Raheja, Josep Castellví, Marta Crespo, Francesc Bosch
No abstract text is available yet for this article.
December 14, 2017: Haematologica
https://www.readbyqxmd.com/read/29242186/biased-igh-vdj-gene-repertoire-and-clonal-expansions-in-b-cells-of-chronically-hepatitis-c-virus-infected-individuals
#8
Felicia A Tucci, Simo Kitanovski, Patricia Johansson, Ludger Klein-Hitpass, Alisan Kahraman, Jan Dürig, Daniel Hoffmann, Ralf Küppers
Patients chronically infected with hepatitis C virus (HCV) frequently develop mixed cryoglobulinemia (MC), a monoclonal expansion of IgM+ autoreactive B cells, and also have an increased B cell lymphoma risk. Whether HCV infection also impacts the B cell compartment and the B cell receptor repertoire in patients not affected by MC or lymphomas is poorly understood. Flow cytometric analysis of peripheral blood B cells of 30 MC-negative HCV-infected patients and 15 healthy controls revealed that frequencies of class-switched memory B cells were increased in the patients, whereas frequencies of transitional and naive B cells were decreased...
December 14, 2017: Blood
https://www.readbyqxmd.com/read/29241019/quantitative-analysis-of-a-multiplexed-immunofluorescence-panel-in-t-cell-lymphoma
#9
Siok-Bian Ng, Shuangyi Fan, Shoa-Nian Choo, Michal Hoppe, Hoang Mai Phuong, Sanjay De Mel, Anand D Jeyasekharan
Immunohistochemistry (IHC) provides clinically useful information on protein expression in cancer cells. However, quantification of colocalizing signals using conventional IHC and visual scores is challenging. Here we describe the application of quantitative immunofluorescence in angioimmunoblastic T-cell lymphoma (AITL), a peripheral T-cell lymphoma characterized by cellular heterogeneity that impedes IHC interpretation and quantification. A multiplexed immunofluorescence (IF) panel comprising T- and B-lymphocyte markers along with T-follicular helper (TFH) markers was validated for appropriate cellular localization in sections of benign tonsillar tissue and tested in two samples of AITL, using a Vectra microscope for spectral imaging and InForm software for analysis...
December 1, 2017: SLAS Technology
https://www.readbyqxmd.com/read/29239593/clinical-significance-of-gene-defects-in-b-cell-lymphomas
#10
Annika Pasanen, Leo Meriranta, Sirpa Leppä
Lymphomas are a heterogenous group of malignant diseases. Identification of sub-groups has created pressure for a more detailed diagnosis and individualized treatment. Although the underlying genetic and molecular pathologic factors of the most common B-cell derived lymphomas, i.e. diffuse large B-cell lymphoma and follicular lymphoma, have become more accurate, prognosis is evaluated and treatment options still selected mainly on the basis of clinical variables. In the future, new generation sequencing methods that are becoming more common in clinical practice will allow the assessment of prognosis and treatment on the basis of biologic and genetic risk factors...
2017: Duodecim; Lääketieteellinen Aikakauskirja
https://www.readbyqxmd.com/read/29239464/cd20-role-in-pathophysiology-of-hodgkin-s-disease
#11
Marcelo Antônio Oliveira Santos, Marinus de Moraes Lima
Hodgkin's lymphoma (HL) is a tumor comprising non-malignant and malignant B-cells. Classical HL expresses CD15+ and CD30+ antigens, and 20 to 40% of patients are CD20+. This antigen is a ligand free protein present in B lymphocyte cells and its function is not well known. Some studies suggest that expression of CD20 may play a major role in Hodgkin's disease pathophysiology and may affect the patients' treatment prognosis, as well as relapse and refractory response. In the past few years, development of monoclonal anti-CD20 antibodies changed drastically the treatment for non-Hodgkin lymphomas in which CD20 is expressed...
September 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/29239317/%C3%AE-n-bcl-xl-a-therapeutic-target-for-neuroprotection
#12
REVIEW
Han-A Park, Elizabeth A Jonas
The B-cell lymphoma-extra large (Bcl-xL) is a mitochondrial anti-apoptotic protein that plays a role in neuroprotection. However, during excitotoxic stimulation, Bcl-xL undergoes caspase-dependent cleavage and produces a fragmented form, ΔN-Bcl-xL. Accumulation of ΔN-Bcl-xL is associated with mitochondrial dysfunction and neuronal death. Therefore, strategies to inhibit the activity or formation of ΔN-Bcl-xL protect the brain against excitotoxic injuries. Our team found that the pharmacological inhibitor ABT-737 exerts dose dependent effects in primary neurons...
November 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29239133/simplicity-at-the-cost-of-predictive-accuracy-in-diffuse-large-b-cell-lymphoma-a-critical-assessment-of-the-r-ipi-ipi-and-nccn-ipi
#13
Jorne Biccler, Sandra Eloranta, Peter de Nully Brown, Henrik Frederiksen, Mats Jerkeman, Karin E Smedby, Martin Bøgsted, Tarec C El-Galaly
The international prognostic index (IPI) and similar models form the cornerstone of clinical assessment in newly diagnosed diffuse large B-cell lymphoma (DLBCL). While being simple and convenient to use, their inadequate use of the available clinical data is a major weakness. In this study, we compared performance of the International Prognostic Index (IPI) and its variations (R-IPI and NCCN-IPI) to a Cox proportional hazards (CPH) model using the same covariates in nondichotomized form. All models were tested in 4863 newly diagnosed DLBCL patients from population-based Nordic registers...
December 13, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/29239080/hcv-positive-lymphoma-after-sustained-virological-response-with-direct-acting-antiviral-agents-the-game-is-not-over-after-hcv-eradication
#14
E Rodríguez de Santiago, K Velázquez Kennedy, M García González, F Gea Rodríguez, L Téllez Villajos, E Tavío Hernández, A Albillos Martínez
We read with interest the study published by Schiavinato A. et al. entitled: " Polyclonal and monoclonal B lymphocytes response in HCV-infected patients treated with direct-acting antiviral agents"[1]. There is extensive data supporting the association between hepatitis C virus (HCV) and B-cell non-Hodgkin lymphoma (B-cell NHL), especially with marginal zone and diffuse large B-cell NHL subtypes. Antiviral treatment with Interferon-based regimens has been shown to improve prognosis and can be curative in some cases of indolent lymphoma...
December 14, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29238080/activation-of-the-c-jun-nh2-terminal-kinase-pathway-by-coronavirus-infectious-bronchitis-virus-promotes-apoptosis-independently-of-c-jun
#15
To Sing Fung, Ding Xiang Liu
Mitogen-activated protein kinases (MAPKs) are conserved protein kinases that regulate a variety of important cellular signaling pathways. Among them, c-Jun N-terminal kinases (JNK) are known to be activated by various environmental stresses including virus infections. Previously, activation of the JNK pathway has been detected in cells infected with several coronaviruses. However, detailed characterization of the pathway as well as its implication in host-virus interactions has not been fully investigated. Here we report that the JNK pathway was activated in cells infected with the avian coronavirus infectious bronchitis virus (IBV)...
December 13, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/29237362/de-novo-malignancies-after-liver-transplantation-a-single-institution-experience
#16
Tufan Egeli, Tarkan Unek, Mucahit Ozbilgin, Cihan Agalar, Serhan Derici, Mesut Akarsu, Ilkay Tugba Unek, Murat Aysin, Aylin Bacakoglu, Ibrahim Astarcıoglu
OBJECTIVES: Our objective was to analyze characteristics, risk factors, and incidence of de novo malignancies after liver transplant. MATERIALS AND METHODS: The hospital records of 557 patients who underwent liver transplant were analyzed from the point of de novo malignancy development. We evaluated the demographic features and survival of these patients retrospectively. RESULTS: The research covered 429 patients, 9 (2%) of whom developed de novo malignancy...
December 14, 2017: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/29235459/pi3k%C3%AE-activates-e2f1-synthesis-in-response-to-mrna-translation-stress
#17
Sivakumar Vadivel Gnanasundram, Slovénie Pyndiah, Chrysoula Daskalogianni, Kate Armfield, Karin Nylander, Joanna B Wilson, Robin Fåhraeus
The c-myc oncogene stimulates ribosomal biogenesis and protein synthesis to promote cellular growth. However, the pathway by which cells sense and restore dysfunctional mRNA translation and how this is linked to cell proliferation and growth is not known. We here show that mRNA translation stress in cis triggered by the gly-ala repeat sequence of Epstein-Barr virus (EBV)-encoded EBNA1, results in PI3Kδ-dependent induction of E2F1 mRNA translation with the consequent activation of c-Myc and cell proliferation...
December 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/29234945/clinical-significance-and-functional-validation-of-inorganic-pyrophosphatase-in-diffuse-large-b-cell-lymphoma-in-humans
#18
Limei Li, Aruna, Dehong Luo, Arong Jin
Diffuse large B-cell lymphoma (DLBCL), the most common type of non-Hodgkin's lymphoma, displays marked heterogeneity. Although it is usually curable, 30-40% of patients die within 1-2 years due to refractory treatment or cancer relapse. In different types of cancer in humans, inorganic pyrophosphatase (PPA1) is deregulated, thereby contributing to tumorigenesis by supplying the tumor with an enormous energy source. However, the role of PPA1 in DLBCL is still unclear. Here, we analized PPA1 in 65 patients with DLBCL and 20 patients with reactive hyperplasia of the lymph nodes (control)...
December 12, 2017: Cytotechnology
https://www.readbyqxmd.com/read/29234922/pharmacokinetically-targeted-dosed-everolimus-maintenance-therapy-in-lymphoma-patients
#19
L K Schoch, A Asiama, M Zahurak, S Shanbhag, J Hurtt, K Sawyer, L J Swinnen, N Wagner-Johnston, R J Jones, R F Ambinder, Douglas E Gladstone
BACKGROUND: Everolimus, an mTOR inhibitor, is active in refractory lymphomas. However, toxicity with flat dosing limits its usage. Speculatively, pharmacokinetically-targeted dosing could improve tolerability. Therefore, we studied serum-trough dosing with rituximab as maintenance after high-dose cyclophosphamide (HDC) consolidation in lymphoma patients. PATIENTS/METHODS: After HDC, everolimus was dosed to serum trough levels (goal 3-15 ng/mL), with quarterly rituximab infusions for 1 year while maintaining < grade II non-hematologic and < grade III hematologic toxicities...
December 13, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/29234360/apoptosis-and-remodeling-in-adriamycin-induced-cardiomyopathy-rat-model
#20
Young Mi Hong, Hyeryon Lee, Min-Sun Cho, Kwan Chang Kim
Purpose: The mechanism for the pathogenesis of adriamycin (ADR)-induced cardiomyopathy is not yet known. Different hypotheses include the production of free radicals, an interaction between ADR and nuclear components, and a disruption in cardiac-specific gene expression. Apoptosis has also been proposed as being involved in cardiac dysfunction. The purpose of this study was to determine if apoptosis might play a role in ADR-induced cardiomyopathy. Methods: Male Sprague-Dawley rats were separated into 2 groups: the control group (C group) and the experimental group (ADR 5 mg/wk for 3 weeks through intraperitoneal injections; A group)...
November 2017: Korean Journal of Pediatrics
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