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https://www.readbyqxmd.com/read/27913503/diffuse-large-b-cell-lymphoma-r-chop-failure-what-to-do
#1
Bertrand Coiffier, Clémentine Sarkozy
Although rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) is the standard treatment for patients with diffuse large B-cell lymphoma (DLBCL), ∼30% to 50% of patients are not cured by this treatment, depending on disease stage or prognostic index. Among patients for whom R-CHOP therapy fails, 20% suffer from primary refractory disease (progress during or right after treatment) whereas 30% relapse after achieving complete remission (CR). Currently, there is no good definition enabling us to identify these 2 groups upon diagnosis...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27910030/recurrent-cytogenetic-abnormalities-in-non-hodgkin-s-lymphoma-and-chronic-lymphocytic-leukemia
#2
Edmond S K Ma
Characteristic chromosomal translocations are found to be associated with subtypes of B-cell non-Hodgkin lymphoma (NHL), for example t(8;14)(q24;q32) and Burkitt lymphoma, t(14;18)(q32;q21) and follicular lymphoma, and t(11;14)(q13;q32) in mantle cell lymphoma. Only few recurrent cytogenetic aberrations have been identified in the T-cell NHL and the best known is the ALK gene translocation t(2;5)(p23;q35) in anaplastic large cell lymphoma. Since lymph node or other tissue is seldom submitted for conventional cytogenetics study, alternative approaches for translocation detection are polymerase chain reaction (PCR) or fluorescence in situ hybridization (FISH)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27909649/in-silico-profiling-of-cell-growth-and-succinate-production-in-escherichia-coli-nzn111
#3
Xingxing Jian, Ningchuan Li, Cheng Zhang, Qiang Hua
BACKGROUND: Succinic acid is a valuable product due to its wide-ranging utilities. To improve succinate production and reduce by-products formation, Escherichia coli NZN111 was constructed by insertional inactivation of lactate dehydrogenase (LDH) and pyruvate formate lyase (PFL) encoded by the genes ldhA and pflB, respectively. However, this double-deletion mutant is incapable of anaerobically growing on glucose in rich or minimal medium even with acetate supplementation. A widespread hold view is that the inactivation of NADH-dependent LDH limits the regeneration of NAD(+) and consequently disables proper growth under anaerobic conditions...
2016: Bioresources and Bioprocessing
https://www.readbyqxmd.com/read/27909234/a-high-throughput-screening-strategy-for-development-of-rnf8-ubc13-protein-protein-interaction-inhibitors
#4
Elisabeth Weber, Ina Rothenaigner, Stefanie Brandner, Kamyar Hadian, Kenji Schorpp
The ubiquitin-proteasome system plays an essential role in a broad range of cellular signaling pathways. Ubiquitination is a posttranslational protein modification that involves the action of an enzymatic cascade (E1, E2, and E3 enzymes) for the covalent attachment of ubiquitin to target proteins. The emerging knowledge of the molecular mechanisms and correlation of deregulation of the ubiquitin system in human diseases is uncovering new opportunities for therapeutics development. The E3 ligase RNF8 acts in cooperation with the heterodimeric E2 enzyme Ubc13/Uev1a to generate ubiquitin conjugates at the sides of DNA double-strand breaks, and recent findings suggest RNF8 as a potential therapeutic target for the treatment of breast cancer...
December 1, 2016: Journal of Biomolecular Screening
https://www.readbyqxmd.com/read/27899392/circulating-lymphoma-cells-of-double-hit-lymphoma
#5
Uqba Khan, Carrie Dul
No abstract text is available yet for this article.
November 29, 2016: BMJ Case Reports
https://www.readbyqxmd.com/read/27899042/hepatic-rhythmicity-of-endoplasmic-reticulum-stress-is-disrupted-in-perinatal-and-adult-mice-models-of-high-fat-diet-induced-obesity
#6
Junpei Soeda, Paul Cordero, Jiawei Li, Angelina Mouralidarane, Esra Asilmaz, Shuvra Ray, Vi Nguyen, Rebeca Carter, Marco Novelli, Manlio Vinciguerra, Lucilla Poston, Paul D Taylor, Jude A Oben
We investigated the regulation of hepatic ER stress in healthy liver and adult or perinatally programmed diet-induced non-alcoholic fatty liver disease (NAFLD). Female mice were fed either obesogenic or control diet before mating, during pregnancy and lactation. Post-weaning, offspring from each maternal group were divided into either obesogenic or control diet. At six months, offspring were sacrificed at 4-h intervals over 24 h. Offspring fed obesogenic diets developed NAFLD phenotype, and the combination of maternal and offspring obesogenic diets exacerbated this phenotype...
November 29, 2016: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/27888878/the-spectrum-of-double-hit-lymphomas
#7
REVIEW
Jeremy S Abramson
Double-hit lymphomas (DHLs) characterize a unique subset of B-cell non-Hodgkin lymphomas. DHL typically presents in older adults with high-risk clinical features. This entity carries a significantly inferior prognosis compared with typical cases of diffuse large B-cell lymphoma; however, emerging literature can identify discrete clinical features within DHL that are associated with a favorable prognosis. Emerging literature is also demonstrating that intensive upfront treatment strategies may improve outcome...
December 2016: Hematology/oncology Clinics of North America
https://www.readbyqxmd.com/read/27888664/ebv-associated-but-hhv8-unrelated-double-hit-effusion-based-lymphoma
#8
Bo-Jung Chen, David Yen-Ting Chen, Chun-Chi Kuo, Shih-Sung Chuang
Effusion-based lymphoma is a rare and unique type of large B-cell lymphoma presenting in effusion without a mass lesion. It shares many clinicopathological features with primary effusion lymphoma (PEL), but is distinct from PEL by the absence of HHV8 association. Double hit lymphoma (DHL) is an aggressive B-cell lymphoma, defined by concurrent rearrangement of MYC and BCL2 or BCL6. DHL often presents as lymphadenopathy or an extranodal mass, but rarely occurs in effusion. Here we report a 61-year-old male with alcoholic cirrhosis presenting as massive ascites and left pleural effusion...
November 26, 2016: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/27876700/double-hit-mouse-model-of-parkinson-s-disease
#9
EDITORIAL
Tommaso Schirinzi, Giuseppina Martella, Antonio Pisani
No abstract text is available yet for this article.
November 18, 2016: Oncotarget
https://www.readbyqxmd.com/read/27864287/double-hit-mouse-model-of-cigarette-smoke-priming-for-acute-lung-injury
#10
Pavlo Sakhatskyy, Zhengke Wang, Diana Borgas, Joanne Lomas-Neira, Yaping Chen, Alfred Ayala, Sharon Rounds, Qing Lu
Epidemiologic studies indicate that cigarette smoking (CS) increases the risk and severity of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS). The mechanism is not understood at least in part due to lack of animal models that reproduce the key features of CS priming process. In this study, using two strains of mice we characterized a double-hit mouse model of ALI induced by CS priming of injury caused by lipopolysaccharide (LPS). C57BL/6 and AKR mice were pre-exposed to CS briefly (3 hours) or sub-acutely (3 weeks) before intra-tracheal instillation of LPS and ALI was assessed 18 hours after LPS administration by measuring lung static compliance, lung edema, vascular permeability, inflammation and alveolar apoptosis...
November 18, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27848920/burkitt-cells-on-a-peripheral-blood-smear-how-to-deal-with
#11
Marie Wyrwas, Jessica Michel, Isabelle Guibaud, Jean-François Lesesve, Blandine Bénet
The diagnosis of double hit lymphoma remains a challenge for the biologist for a good management of the patient. This new category of lymphoma "double hit" (DH) is part of a new entity of the WHO classification 2008: « Unclassifiable B lymphoma with features intermediate between diffuse large cell B lymphoma and Burkitt's lymphoma ». It is defined by the presence of a breakpoint at the locus 8q24 of the c-MYC gene associated with a recurrent translocation involving BCL2 genes primarily BCL6 or more rarely CCDN1 or BCL3 genes...
December 1, 2016: Annales de Biologie Clinique
https://www.readbyqxmd.com/read/27827884/cedratvirus-a-double-cork-structured-giant-virus-is-a-distant-relative-of-pithoviruses
#12
Julien Andreani, Sarah Aherfi, Jacques Yaacoub Bou Khalil, Fabrizio Di Pinto, Idir Bitam, Didier Raoult, Philippe Colson, Bernard La Scola
Most viruses are known for the ability to cause symptomatic diseases in humans and other animals. The discovery of Acanthamoeba polyphaga mimivirus and other giant amoebal viruses revealed a considerable and previously unknown area of uncharacterized viral particles. Giant viruses have been isolated from various environmental samples collected from very distant geographic places, revealing a ubiquitous distribution. Their morphological and genomic features are fundamental elements for classifying them. Herein, we report the isolation and draft genome of Cedratvirus, a new amoebal giant virus isolated in Acanthamoeba castellanii, from an Algerian environmental sample...
November 3, 2016: Viruses
https://www.readbyqxmd.com/read/27821509/approach-to-the-diagnosis-and-treatment-of-high-grade-b-cell-lymphomas-with-myc-and-bcl2-and-or-bcl6-rearrangements
#13
Pierre Sesques, Nathalie A Johnson
High grade B cell lymphomas (HGBL) with MYC and BCL2 and/or BCL6 rearrangements, so-called "double hit" lymphomas (HGBL-DH), are aggressive lymphomas that form a separate provisional entity in the 2016 revised World Heath Organization Classification of Lymphoid Tumours. Fluorescence in situ hybridization (FISH) will be required to identify HGBL-DH and will re-classify a subset of diffuse large B cell lymphomas (DLBCL) and HGBL with features intermediate between DLBCL and Burkitt lymphoma into this new category...
November 7, 2016: Blood
https://www.readbyqxmd.com/read/27816604/invasive-high-grade-upper-tract-urothelial-carcinoma-in-a-14-year-old-girl
#14
Michael K Lam, Aaron P Bayne, Gregory A Thomas, J Christopher Austin
We present an unusual pediatric case of invasive upper tract urothelial carcinoma with an associated genetic predisposition. A 14 year-old female presented with intermittent right flank pain, and was found to have a poorly functioning hydronephrotic right kidney. Laparoscopic nephrectomy was performed. Pathology demonstrated upper tract urothelial carcinoma, and she subsequently underwent completion ureterectomy. Genetic studies demonstrated a double-hit constitutional deletion of a DNA mismatch repair protein, revealing a rare Lynch syndrome variant known as Constitutional Mismatch Repair Deficiency Syndrome (CMMRD)...
November 2, 2016: Urology
https://www.readbyqxmd.com/read/27810071/myc-rearranged-b-cell-neoplasms-impact-of-genetics-on-classification
#15
Sabine Haberl, Torsten Haferlach, Anna Stengel, Sabine Jeromin, Wolfgang Kern, Claudia Haferlach
A cohort comprising 156 patients with B-cell neoplasms harboring an MYC rearrangement was analyzed with respect to phenotypic presentation, molecular markers (TP53, MYC and ID3) and additional cytogenetic abnormalities (concomitantly occurring BCL2, BCL6 and/or CCND1 rearrangements; double, triple or quadruple hit lymphomas = multiple hit lymphomas). MYC translocations occurred as single hit (only MYC rearranged, 63%) or multiple hit lymphoma (37%) and presented as acute leukemia (AL) (14%), Burkitt lymphoma (30%), chronic lymphocytic leukemia (CLL) (21%) or other mature B-cell neoplasms (35%)...
October 2016: Cancer Genetics
https://www.readbyqxmd.com/read/27806850/aggressive-b-cell-lymphomas-frequency-immunophenotype-and-genetics-in-a-reference-laboratory-population
#16
Yalda B Naeini, Annie Wu, Dennis P O'Malley
Diffuse large B-cell lymphoma (DLBCL) is the most common type of lymphoma worldwide. The current World Health Organization classification includes several subtypes based on a combination of clinical, immunohistochemical, and genetic differences. Other aggressive variants of B-cell lymphomas, including Burkitt lymphoma and double-hit lymphomas are part of the differential diagnosis and often have overlapping features with DLBCL. In this study, we evaluated 760 of cases of DLBCL and other aggressive B-cell lymphomas using a relatively uniform immunohistochemical panel and genetic methods...
December 2016: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/27806821/double-hit-lymphoma-arare-subset-of-diffuse-large-b-cell-lymphoma-with-poor-outcome
#17
Sajid Zaman, Jawad A Gillani, Rashid Rasheed
Double-hit lymphoma (DHL) has been identified as a subset of diffuse large B-cell lymphoma with poor clinical outcomes. It is because of genetic translocation of C-myc and Bcl2 gene that make it more aggressive and un-responsive to conventional and salvage treatments. DHLis an extremely rare entity of non-Hodgkin's lymphoma (NHL) having no established incidence data so far. In literature very limited data is available to guide therapeutic decisions and despite aggressive chemotherapy followed by autologus hematopoietic cell transplantation, outcomes still remain poor...
October 2016: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/27803769/hepatitis-c-and-double-hit-b-cell-lymphoma-successfully-treated-by-antiviral-therapy
#18
Giovanni Galati, Lorenzo Rampa, Umberto Vespasiani-Gentilucci, Mirella Marino, Francesco Pisani, Carlo Cota, Alessandro Guidi, Antonio Picardi
B cells lymphoma is one of the most challenging extra-hepatic manifestations of hepatitis C virus (HCV). Recently, a new kind of B-cell lymphoma, named double-hit B (DHL), was characterized with an aggressive clinical course whereas a potential association with HCV was not investigated. The new antiviral direct agents (DAAs) against HCV are effective and curative in the majority of HCV infections. We report the first case, to our knowledge, of DHL and HCV-infection successfully treated by new DAAs. According to our experience, a DHL must be suspected in case of HCV-related lymphoma, and an early diagnosis could direct towards a different hematological management because a worse prognosis might be expected...
October 18, 2016: World Journal of Hepatology
https://www.readbyqxmd.com/read/27782359/iceberg-killing-fields-limit-huge-potential-for-benthic-blue-carbon-in-antarctic-shallows
#19
David K A Barnes
Climate-forced ice losses are increasing potential for iceberg-seabed collisions, termed ice scour. At Ryder Bay, West Antarctic Peninsula (WAP) sea ice, oceanography, phytoplankton and encrusting zoobenthos have been monitored since 1998. In 2003, grids of seabed markers, covering 225 m(2) , were established, surveyed and replaced annually to measure ice scour frequency. Disturbance history has been recorded for each m(2) of seabed monitored at 5-25 m for ~13 years. Encrusting fauna, collected from impacted and nonimpacted metres each year, show coincident benthos responses in growth, mortality and mass of benthic immobilized carbon...
October 26, 2016: Global Change Biology
https://www.readbyqxmd.com/read/27776009/mantle-cell-lymphoma-with-myc-rearrangement-a-report-of-17-patients
#20
Zhihong Hu, L Jeffrey Medeiros, Zi Chen, Weina Chen, Shaoying Li, Sergej N Konoplev, Xinyan Lu, Lan V Pham, Ken H Young, Wei Wang, Shimin Hu
MYC rearrangement in mantle cell lymphoma (MCL) is rare, and its clinicopathologic significance is not well defined. We report 17 cases of MCL with 8q24/MYC rearrangement, detected at the time of initial diagnosis of MCL in 10 patients and subsequently during the clinical course in 7 patients. There were 12 men and 5 women with a median age of 61 years (range, 49 to 81 y). Fourteen patients had lymphadenopathy (Ann Arbor stage III/IV), and 3 patients presented with a leukemic pattern without lymphadenopathy...
October 21, 2016: American Journal of Surgical Pathology
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