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Microenvironment lymphoma

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https://www.readbyqxmd.com/read/27933753/mass-cytometry-of-follicular-lymphoma-tumors-reveals-intrinsic-heterogeneity-in-proteins-including-hla-dr-and-a-deficit-in-non-malignant-plasmablast-and-germinal-center-b-cell-populations
#1
Cara Ellen Wogsland, Allison Rae Greenplate, Arne Kolstad, June Helen Myklebust, Jonathan Michael Irish, Kanutte Huse
BACKGROUND: Follicular lymphoma (FL) is an indolent non-Hodgkin lymphoma that has a risk of transformation to more aggressive lymphoma. Relatively little is known about the non-malignant B-cell and T-cell subset composition within the tumor microenvironment and whether altered phenotypes are associated with patterns of lymphoma B-cell heterogeneity. METHODS: Two mass cytometry (CyTOF) panels were designed to immunophenotype B and T cells in FL tumors. Populations of malignant B cells, non-malignant B cells, and T cells from each FL tumor were identified and their phenotypes compared to B and T cells from healthy human tonsillar tissue...
December 9, 2016: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/27913493/novel-agents-in-follicular-lymphoma-choosing-the-best-target
#2
Laurie H Sehn
Outcomes in patients with follicular lymphoma (FL) have improved dramatically over the last decade. However, novel agents are greatly needed for those who exhibit treatment resistance, in order to minimize lifelong toxicity and to enable combinations that may allow us to achieve the elusive goal of cure. Biological advances have led to the discovery of a large number of potential therapeutic targets and the development of a plethora of novel agents designed to exploit these processes. Possible targets include tumor cell surface markers, key components of intracellular pathways and epigenetic mechanisms, and reactive cells of the microenvironment...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27912844/heparanase-from-basic-research-to-therapeutic-applications-in-cancer-and-inflammation
#3
Israel Vlodavsky, Preeti Singh, Ilanit Boyango, Lilach Gutter-Kapon, Michael Elkin, Ralph D Sanderson, Neta Ilan
Heparanase, the sole heparan sulfate degrading endoglycosidase, regulates multiple biological activities that enhance tumor growth, angiogenesis and metastasis. Heparanase expression is enhanced in almost all cancers examined including various carcinomas, sarcomas and hematological malignancies. Numerous clinical association studies have consistently demonstrated that upregulation of heparanase expression correlates with increased tumor size, tumor angiogenesis, enhanced metastasis and poor prognosis. In contrast, knockdown of heparanase or treatments of tumor-bearing mice with heparanase-inhibiting compounds, markedly attenuate tumor progression further underscoring the potential of anti-heparanase therapy for multiple types of cancer...
November 2016: Drug Resistance Updates: Reviews and Commentaries in Antimicrobial and Anticancer Chemotherapy
https://www.readbyqxmd.com/read/27910859/t-cell-programming-in-pancreatic-adenocarcinoma-a-review
#4
REVIEW
Y D Seo, V G Pillarisetty
Despite recent advancements in multimodal therapy, pancreatic ductal adenocarcinoma (PDA) continues to have a dismal prognosis. In the era of burgeoning immune therapies against previously difficult-to-treat malignancies, there has been growing interest in activating the immune system against PDA; however, unlike in other cancers such as melanoma and lymphoma, immunotherapy has not yielded many clinically significant results. To harness these mechanisms for therapeutic use, an in-depth understanding of T-cell programming in the immune microenvironment of PDA must be achieved...
December 2, 2016: Cancer Gene Therapy
https://www.readbyqxmd.com/read/27910780/naringenin-ameliorates-doxorubicin-toxicity-and-hypoxic-condition-in-dalton-s-lymphoma-ascites-tumor-mouse-model-evidence-from-electron-paramagnetic-resonance-imaging
#5
Venkatesan Kathiresan, Swathika Subburaman, Arun Venkatesh Krishna, Mathivanan Natarajan, Gandhidasan Rathinasamy, Kumaresan Ganesan, Murugesan Ramachandran
Doxorubicin (DOX) is a well-known cytotoxic agent used extensively as a chemotherapeutic drug to eradicate a wide variety of human cancers. Reactive oxygen species (ROS)-mediated oxidative stress during DOX treatment can induce cardiac, renal, and hepatic toxicities, which can constrain its use as a potential cytotoxic agent. The present work investigates the antioxidant potential of naringenin (NAR) against DOXinduced toxicities of a Dalton's lymphoma ascites (DLA) tumor-bearing mouse model. Mice were randomized into four groups: a negative control, positive control, DOX (2...
2016: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/27905003/new-agents-in-hsc-mobilization
#6
REVIEW
Mélanie J Domingues, Susan K Nilsson, Benjamin Cao
Mobilized peripheral blood (PB) is the most common source of hematopoietic stem cells (HSC) for autologous transplantation. Granulocyte colony stimulating factor (G-CSF) is the most commonly used mobilization agent, yet despite its widespread use, a considerable number of patients still fail to mobilize. Recently, a greater understanding of the interactions that regulate HSC homeostasis in the bone marrow (BM) microenvironment has enabled the development of new molecules that mobilize HSC through specific inhibition, modulation or perturbation of these interactions...
November 30, 2016: International Journal of Hematology
https://www.readbyqxmd.com/read/27897411/skeletal-muscle-density-is-an-independent-predictor-of-diffuse-large-b-cell-lymphoma-outcomes-treated-with-rituximab-based-chemoimmunotherapy
#7
Michael P Chu, Jessica Lieffers, Sunita Ghosh, Andrew Belch, Neil S Chua, Amelie Fontaine, Randeep Sangha, Robert A Turner, Vickie E Baracos, Michael B Sawyer
BACKGROUND: While much cancer research focuses on tumours and their microenvironment, malignancies cause widespread physiologic changes. Cancer and treatment-related sarcopenia, measured with quantitative imaging or as a decrease in overall body mass, are indicative of poor prognosis in elderly diffuse large B-cell lymphoma (DLBCL) patients, skeletal muscle radiodensity (SMD) may be a better prognostic marker. SMD, a measure of muscle radiation attenuation on CT imaging, is more prognostic than sarcopenia or International Prognostic Index (IPI) scores in follicular lymphoma and multiple solid organ malignancies...
November 21, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27893746/mast-cells-are-abundant-in-primary-cutaneous-t-cell-lymphomas-results-from-a-computer-aided-quantitative-immunohistological-study
#8
Johanna Eder, Radu Rogojanu, Waltraud Jerney, Friedrich Erhart, Alexander Dohnal, Melitta Kitzwögerer, Georg Steiner, Julia Moser, Franz Trautinger
BACKGROUND: Mast cells (MC) are bone marrow derived haematopoetic cells playing a crucial role not only in immune response but also in the tumor microenvironment with protumorigenic and antitumorigenic functions. The role of MC in primary cutaneous T-cell lymphomas (CTCL), a heterogeneous group of non-Hodgkin lymphomas with initial presentation in the skin, is largely unknown. OBJECTIVE: To gain more accurate information about presence, number, distribution and state of activation (degranulated vs...
2016: PloS One
https://www.readbyqxmd.com/read/27884973/the-emerging-role-of-immune-checkpoint-inhibition-in-malignant-lymphoma
#9
Ida Hude, Stephanie Sasse, Andreas Engert, Paul J Bröckelmann
To evade elimination by the host immune system, tumor cells commonly exploit physiological immune checkpoint pathways, restraining efficient anti-tumor immune cell function. Growing understanding of the complex dialog between tumor cells and their microenvironment contributed to the development of immune checkpoint inhibitors. This innovative strategy has demonstrated paradigm-shifting clinical activity in various malignancies. Antibodies targeting programmed death 1 and cytotoxic T-lymphocyte-associated protein-4 are also being investigated in lymphoid malignancies with varying levels of activity and a favorable toxicity profile...
November 24, 2016: Haematologica
https://www.readbyqxmd.com/read/27876058/a-novel-non-hodgkin-lymphoma-murine-model-closer-to-the-standard-clinical-scenario
#10
Thais Bascuas, María Moreno, Amy Mónaco, Laura Reyes, Andrea Paolino, Patricia Oliver, María G Kramer, Henry Engler, José P Pacheco, Sofía Grille, José A Chabalgoity
BACKGROUND: Non-Hodgkin lymphomas (NHL) are the most frequent hemato-oncological malignancies. Despite recent major advances in treatment, a substantial proportion of patients relapses highlighting the need for new therapeutic modalities. Promissory results obtained in pre-clinical studies are usually not translated when moving into clinical trials. Pre-clinical studies are mainly conducted in animals with high tumor burden; instead patients undergo chemotherapy as first line of treatment and most likely are under remission when immunotherapies are applied...
November 22, 2016: Journal of Translational Medicine
https://www.readbyqxmd.com/read/27872741/novel-drugs-in-follicular-lymphoma
#11
REVIEW
Antonella Anastasia, Giuseppe Rossi
Follicular lymphoma(FL) is the most common indolent non-Hodgkin lymphoma and constitutes 15% to 30% of lymphoma diagnoses. The natural history of the disease is characterized by recurrent relapses and progressively shorter remissions with a median survival of 10yrs. The impossibility of achieving a definite cure, have prompted investigations into the possible role of more active and less toxic strategies with innovative therapeutic agents. Recently Casulo et al. demonstrated that approximately 20% of patients with FL relapse within two years after achieving remission with R-CHOP and have a poor prognosis...
2016: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/27831553/reed-sternberg-cells-in-hodgkin-s-lymphoma-present-features-of-cellular-senescence
#12
J Gopas, E Stern, U Zurgil, J Ozer, A Ben-Ari, G Shubinsky, A Braiman, R Sinay, J Ezratty, V Dronov, S Balachandran, D Benharroch, E Livneh
Hodgkin's Lymphoma (HL) is one of the most prevailing malignancies in young adults. Reed-Sternberg (RS) cells in HL have distinctive large cell morphology, are characteristic of the disease and their presence is essential for diagnosis. Enlarged cells are one of the hallmarks of senescence, but whether RS cells are senescent has not been previously investigated. Here we show that RS cells have characteristics of senescent cells; RS cells in HL biopsies specifically express the senescence markers and cell cycle inhibitors p21(Cip1) and p16(INK4a) and are negative for the proliferation marker Ki-67, suggesting that these cells have ceased to proliferate...
November 10, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27827995/nod-scid-gamma-mice-are-permissive-to-allogeneic-hsc-transplantation-without-prior-conditioning
#13
Tom Verbiest, Rosemary Finnon, Natalie Brown, Paul Finnon, Simon Bouffler, Christophe Badie
Scid hematopoietic stem cells (HSCs) have an intrinsic defect in their maintenance within the bone marrow (BM) niche which facilitates HSC transplantation without the absolute requirement of prior conditioning. Nevertheless, NOD scid mice have a significantly altered life span due to early development of thymic lymphomas, which compromises the ability to study the long-term fate of exogenous HSCs and their progeny. Here, we present data on the transplantation of HSCs into NOD scid gamma (NSG) mice to achieve long-term engraftment without prior conditioning...
November 7, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27825460/bone-marrow-microenvironment-in-waldenstrom-s-macroglobulinemia
#14
REVIEW
Shahrzad Jalali, Stephen M Ansell
Waldenstrom Macroglobulinemia (WM) is a low-grade B-cell lymphoma defined firstly by infiltration of lymphoplasmacytic cells into the bone marrow (BM), the milieu where the cells acquire signals that promote malignant growth and proliferation. A second characteristic associated with WM is the increased synthesis of monoclonal immunoglobulin M (IgM) by lymphoplasmacytic cells, which is secreted in the serum and often results in hyperviscosity. Advanced genomic tools have improved our understanding of the genetic events that contribute to malignant transformation in WM, but the role of BM microenvironment is also emerging as having an essential role in WM disease progression...
June 2016: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/27816718/atypical-variants-of-nodular-lymphocyte-predominant-hodgkin-lymphoma-show-low-microvessel-density-and-vessels-of-distention-type
#15
Victoria Scheidt, Martin-Leo Hansmann, Bianca Schuhmacher, Claudia Döring, Sylvia Hartmann
Nodular lymphocyte predominant Hodgkin lymphoma (NLPHL) presents different histopathologic growth patterns, including atypical forms showing overlapping histopathologic and clinical features with T cell/histiocyte rich large B cell lymphoma (THRLBCL). As growth patterns are associated with vessel distribution, the aim of the present study was to compare angiogenesis in different NLPHL patterns with THRLBCL as well as other lymphomas. Atypical variants of NLPHL and THRLBCL (n=10 per group) both showed a low microvessel density (MVD, 1...
November 2, 2016: Human Pathology
https://www.readbyqxmd.com/read/27807096/car-t-cells-restore-tumor-suppressor-function-in-lymphoma
#16
(no author information available yet)
HVEM loss drives B-cell proliferation and promotes a protumorigenic microenvironment.
November 2016: Cancer Discovery
https://www.readbyqxmd.com/read/27794629/glancing-at-the-complex-biology-of-t-cells-through-the-microenvironment-of-hodgkin-lymphoma
#17
J C Villasboas, Stephen Ansell
No abstract text is available yet for this article.
October 31, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27782301/clinical-manifestations-and-pathogenesis-of-cutaneous-lymphomas-current-status-and-future-directions
#18
REVIEW
Belen Rubio-Gonzalez, Jasmine Zain, Steven T Rosen, Christiane Querfeld
The primary cutaneous lymphomas are a heterogeneous group of T-, Natural Killer- and B- cell neoplasms with a wide range of clinical and pathological presentations, and with very different prognoses compared to systemic lymphomas. Recent studies have shown that the skin microenvironment, which is composed of various immune cell subsets as well as their spatial distribution and T-cell interactions through different chemokines and cytokines, has an important role in the development and pathogenesis of cutaneous lymphomas and has assisted in the development of novel and more effective immunotherapies...
October 26, 2016: British Journal of Haematology
https://www.readbyqxmd.com/read/27775850/clinicopathological-characteristics-and-genomic-profile-of-primary-sinonasal-tract-diffuse-large-b-cell-lymphoma-dlbcl-reveals-gain-at-1q31-and-rgs1-encoding-protein-high-rgs1-immunohistochemical-expression-associates-with-poor-overall-survival-in-dlbcl-nos
#19
Joaquim Carreras, Yara Yukie Kikuti, Sílvia Beà, Masashi Miyaoka, Shinichiro Hiraiwa, Haruka Ikoma, Ryoko Nagao, David Martin-Garcia, Itziar Salaverria, Ai Sato, Ichiki Akifumi, Giovanna Roncador, Juan F Garcia, Kiyoshi Ando, Elias Campo, Naoya Nakamura
AIMS AND METHODS: We aimed to define the clinicopathological characteristics of 29 primary sinonasal diffuse large B-cell lymphoma (DLBCL(sn) ) in a series of 240 DLBCL(all ()(NOS)()) including DLBCL(sn) training set (n=11) and validation set (n=18), and DLBCL(non-sn) (n=211). RESULTS: In the training set 82% had non-GCB phenotype and 18% were EBER(+) . The genomic profile showed gains((+)) of 1q21.3q31.2 (55%), 10q24.1 (46%), 11q14.1 (46%) and 18q12.1q23 (46%); losses((-)) of 6q26q27 (55%) and 9p21...
October 24, 2016: Histopathology
https://www.readbyqxmd.com/read/27760548/atl-derived-exosomes-modulate-mesenchymal-stem-cells-potential-role-in-leukemia-progression
#20
Jamal El-Saghir, Farah Nassar, Nadim Tawil, Marwan El-Sabban
BACKGROUND: Exosomes are membrane nano-vesicles secreted by a multitude of cells that harbor biological constituents such as proteins, lipids, mRNA and microRNA. Exosomes can potentially transfer their cargo to other cells, implicating them in many patho-physiological processes. Mesenchymal stem cells (MSCs), residents of the bone marrow and metastatic niches, potentially interact with cancer cells and/or their derived exosomes. In this study, we investigated whether exosomes derived from adult T-cell leukemia/lymphoma (ATL) cells act as intercellular messengers delivering leukemia-related genes that modulate the properties of human MSCs in favor of leukemia...
October 19, 2016: Retrovirology
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