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https://www.readbyqxmd.com/read/27929746/exogenous-expression-of-samhd1-inhibits-proliferation-and-induces-apoptosis-in-cutaneous-t-cell-lymphoma-derived-hut78-cells
#1
Karthik M Kodigepalli, Minghua Li, Shan-Lu Liu, Li Wu
Sterile alpha motif and HD domain-containing protein 1 (SAMHD1) is a mammalian dNTP hydrolase (dNTPase) that regulates intracellular dNTP balance. We have previously reported that SAMHD1 mRNA and protein levels are significantly downregulated in CD4(+) T-cells of patients with cutaneous T-cell lymphoma (CTCL), a disease characterized by infiltration of neoplastic CD4(+) T-lymphocytes into the skin. However, functional significance of SAMHD1 in CTCL development and progression remains unknown. Here we investigate the mechanism by which SAMHD1 induces apoptosis in CTCL-derived CD4(+) T-cells...
December 8, 2016: Cell Cycle
https://www.readbyqxmd.com/read/27893746/mast-cells-are-abundant-in-primary-cutaneous-t-cell-lymphomas-results-from-a-computer-aided-quantitative-immunohistological-study
#2
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/27889686/microrna-181-contributes-to-downregulation-of-samhd1-expression-in-cd4-t-cells-derived-from-s%C3%A3-zary-syndrome-patients
#3
Rebecca Kohnken, Karthik M Kodigepalli, Anjali Mishra, Pierluigi Porcu, Li Wu
Sézary syndrome (SS) is a rare subtype of cutaneous T-cell lymphoma (CTCL) that is characterized by aggressive spread of neoplastic CD4+ T-cells from the skin into the bloodstream with metastasis to visceral organs. The deoxynucleoside triphosphohydrolase SAMHD1 is highly expressed in normal CD4+ T-cells, while its expression is down-regulated in CD4+ T-cells from SS patients. MicroRNA (miR) dysregulation is an important epigenetic mechanism in the pathogenesis and progression of SS. MiR-181 has been shown to inhibit SAMHD1 expression in cell lines and was identified as an important prognostic biomarker in CTCL...
November 17, 2016: Leukemia Research
https://www.readbyqxmd.com/read/27878874/lymphocytes-from-patients-with-cutaneous-t-cell-lymphoma-show-dna-instability-and-reduced-dna-repair-using-the-comet-assay
#4
Kristian Thestrup-Pedersen, Chen Wang
We have shown that cutaneous T cell lymphoma (CTCL) is associated with the presence of genotraumatic T lymphocytes1,2. In order to study the genetic stability in lymphocytes from CTCL, we used the Comet assay3. This assay measures DNA damage and can measure DNA repair after DNA damage following low-dosage X-rays or UV light. In a gel electrophoresis spreading of DNA pieces can be visualized3. In order to measure DNA repair, cells can be left for certain time periods before subjected to electrophoresis. Lymphocytes from healthy persons repair their DNA damage, but here we document that this is not the case with blood and skin-homing T lymphocytes from CTCL patients even in the early stages of disease...
November 23, 2016: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/27836797/fish-panel-for-leukemic-ctcl
#5
Jason Weed, Juliet Gibson, Julia Lewis, Kacie Carlson, Francine Foss, Jaehyuk Choi, Peining Li, Michael Girardi
No abstract text is available yet for this article.
November 8, 2016: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/27821903/proteomic-approaches-to-biomarker-discovery-in-cutaneous-t-cell-lymphoma
#6
REVIEW
Alexandra Ion, Iris Maria Popa, Laura Maria Lucia Papagheorghe, Cristina Lisievici, Mihai Lupu, Vlad Voiculescu, Constantin Caruntu, Daniel Boda
Cutaneous T-cell lymphoma (CTCL) is the most frequently encountered type of skin lymphoma in humans. CTCL encompasses multiple variants, but the most common types are mycosis fungoides (MF) and Sezary syndrome (SS). While most cases of MF run a mild course over a period of many years, other subtypes of CTCL are very aggressive. The rapidly expanding fields of proteomics and genomics have not only helped increase knowledge concerning the carcinogenesis and tumor biology of CTCL but also led to the discovery of novel markers for targeted therapy...
2016: Disease Markers
https://www.readbyqxmd.com/read/27813438/targeting-histone-deacetylases-in-t-cell-lymphoma
#7
Alison J Moskowitz, Steven M Horwitz
Histone deacetylase inhibitors (HDACi) are epigenetic modifiers with single-agent activity in patients with cutaneous and peripheral T-cell lymphoma (CTCL, PTCL). The mechanisms for this preferential activity remain unclear, and although some would term this as 'class effect,' there are differences in efficacy and safety, likely a result of the varying chemical structures/classes, histone and non-histone targets, potencies, and clinical dosing for each. Three HDACi have single-agent approval in relapsed/refractory TCL in the United States: romidepsin in CTCL and PTCL, vorinostat in CTCL, and belinostat in PTCL...
November 4, 2016: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/27805921/c-cbl-e3-ubiquitin-ligase-expression-increases-across-the-spectrum-of-benign-and-malignant-t-cell-skin-diseases
#8
Katrin A Salva, Margo J Reeder, Rita Lloyd, Gary S Wood
Prolonged survival of lesional T cells plays a central role in the pathogenesis of T-cell-mediated dermatoses. We have recently shown that the ubiquitin ligase c-CBL is highly expressed in cutaneous T-cell lymphoma (CTCL) and that its knockdown increases activation-induced cell death, a key pathway for T-cell apoptosis. Here, we extend our work on c-CBL expression in malignant T cells to their nonneoplastic counterparts in benign inflammatory dermatoses. Immunohistochemical staining with anti-c-CBL antibody was performed on lesional biopsies from a total of 65 patients with atopic dermatitis, allergic contact dermatitis, pityriasis rosea, psoriasis vulgaris, lichen planus, mycosis fungoides (MF)/Sézary syndrome (SS) as well as on tonsil tissue from 5 individuals and on 5 human CTCL cell lines...
October 31, 2016: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/27766406/cd164-identifies-cd4-t-cells-highly-expressing-genes-associated-with-malignancy-in-s%C3%A3-zary-syndrome-the-s%C3%A3-zary-signature-genes-fcrl3-tox-and-mir-214
#9
Bernice M Benoit, Neha Jariwala, Geraldine O'Connor, Landon K Oetjen, Timothy M Whelan, Adrienne Werth, Andrea B Troxel, Hélène Sicard, Lisa Zhu, Christopher Miller, Junko Takeshita, Daniel W McVicar, Brian S Kim, Alain H Rook, Maria Wysocka
Sézary syndrome (SS), a leukemic variant of cutaneous T-cell lymphoma (CTCL), is associated with a significantly shorter life expectancy compared to skin-restricted mycosis fungoides. Early diagnosis of SS is, therefore, key to achieving enhanced therapeutic responses. However, the lack of a biomarker(s) highly specific for malignant CD4(+) T cells in SS patients has been a serious obstacle in making an early diagnosis. We recently demonstrated the high expression of CD164 on CD4(+) T cells from Sézary syndrome patients with a wide range of circulating tumor burdens...
October 20, 2016: Archives of Dermatological Research
https://www.readbyqxmd.com/read/27743911/small-molecule-inhibitors-of-ataxia-telangiectasia-and-rad3-related-kinase-atr-sensitize-lymphoma-cells-to-uva-radiation
#10
Edyta Biskup, David Gram Naym, Robert Gniadecki
BACKGROUND: Psoralen plus ultraviolet A (PUVA) photochemotherapy is a combination treatment used for inflammatory and neoplastic skin diseases such as mycosis fungoides (MF), the most common type of cutaneous T-cell lymphoma (CTCL). However, 30% of MF patients do not respond sufficiently to PUVA and require more aggressive therapies. OBJECTIVE: The aim of this project was to investigate whether inhibition of Ataxia Telangiectasia and Rad3 related kinase (ATR) may enhance efficacy of phototherapy...
December 2016: Journal of Dermatological Science
https://www.readbyqxmd.com/read/27741338/75-complete-response-and-15-partial-response-to-extracorporeal-photopheresis-combined-with-other-therapies-in-resistant-early-stage-cutaneous-t-cell-lymphoma
#11
Sila Seremet, Sunil Abhyankar, Tiffany J Herd, Daniel Aires
INTRODUCTION: Extracorporeal photopheresis (ECP) has been used for the treatment of advanced stage or treatment refractory cutaneous T-cell lymphoma (CTCL) since 1987, and more recently has also been shown to be of benefit for earlier stage resistant CTCL. Complete response rates in prior studies of ECP in early CTCL have ranged from 0% to 40%. METHODS: We reviewed electronic medical records of all CTCL patients seen in the University of Kansas Cancer Center between June 2007 and May 2011...
October 1, 2016: Journal of Drugs in Dermatology: JDD
https://www.readbyqxmd.com/read/27732942/doxycycline-is-an-nf-%C3%AE%C2%BAb-inhibitor-that-induces-apoptotic-cell-death-in-malignant-t-cells
#12
Carolina V Alexander-Savino, Matthew S Hayden, Christopher Richardson, Jiyong Zhao, Brian Poligone
Cutaneous T-cell Lymphoma (CTCL) is a rare non-Hodgkin's lymphoma that can affect the skin, blood, and lymph nodes, and can metastasize at late stages. Novel therapies that target all affected disease compartments and provide longer lasting responses while being safe are needed. One potential therapeutic target is NF-κB, a regulator of immune responses and an important participant in carcinogenesis and cancer progression. As a transcription factor, NF-κB targets genes that promote cell proliferation and survival...
October 6, 2016: Oncotarget
https://www.readbyqxmd.com/read/27717961/malignant-inflammation-in-cutaneous-t-cell-lymphoma-a-hostile-takeover
#13
Thorbjørn Krejsgaard, Lise M Lindahl, Nigel P Mongan, Mariusz A Wasik, Ivan V Litvinov, Lars Iversen, Erik Langhoff, Anders Woetmann, Niels Odum
Cutaneous T-cell lymphomas (CTCL) are characterized by the presence of chronically inflamed skin lesions containing malignant T cells. Early disease presents as limited skin patches or plaques and exhibits an indolent behavior. For many patients, the disease never progresses beyond this stage, but in approximately one third of patients, the disease becomes progressive, and the skin lesions start to expand and evolve. Eventually, overt tumors develop and the malignant T cells may disseminate to the blood, lymph nodes, bone marrow, and visceral organs, often with a fatal outcome...
October 7, 2016: Seminars in Immunopathology
https://www.readbyqxmd.com/read/27704468/s%C3%A3-zary-syndrome-clinical-and-biological-aspects
#14
Rebecca Kohnken, Stephanie Fabbro, Justin Hastings, Pierluigi Porcu, Anjali Mishra
Sézary syndrome (SS) is a rare and aggressive type of cutaneous T cell lymphoma (CTCL) characterized by an intensely pruritic, exfoliative rash, known as erythroderma, with cutaneous and systemic dissemination of clonal CD4+ T cells into the blood and lymph nodes. This review aims to present recent advancements in the biological and clinical aspects of SS. We begin by providing an overview of the diagnostic criteria for SS and reviewing some of its epidemiological and clinical aspects. We then discuss updates in the etiology of this elusive disease and the genetic and molecular landscapes that define it...
October 4, 2016: Current Hematologic Malignancy Reports
https://www.readbyqxmd.com/read/27649045/a-retrospective-comparative-outcome-analysis-following-systemic-therapy-in-mycosis-fungoides-and-sezary-syndrome
#15
Walter Hanel, Robert Briski, Charles W Ross, Thomas F Anderson, Mark S Kaminski, Alexandra C Hristov, Ryan A Wilcox
Cutaneous T-cell lymphomas (CTCL), with few exceptions, remain incurable and treatment is largely palliative. We performed a retrospective analysis of systemic treatment outcomes of patients diagnosed with MF/SS. We identified 223 patients with MF/SS evaluated at a single institution from 1997 to 2013. Disease stage at diagnosis, time of treatment, and treatments received were retrospectively analyzed using our CTCL database. The primary endpoint was time to next treatment (TTNT). Treatment outcomes were analyzed using Kaplan-Meier method and comparisons among groups were made using log-rank analysis...
December 2016: American Journal of Hematology
https://www.readbyqxmd.com/read/27637428/clinical-efficacy-of-romidepsin-in-tumor-stage-and-folliculotropic-mycosis-fungoides
#16
Francine Foss, Madeleine Duvic, Adam Lerner, Joel Waksman, Sean Whittaker
BACKGROUND: Tumor stage and folliculotropic mycosis fungoides are uncommon subtypes of cutaneous T-cell lymphoma (CTCL) with an aggressive disease course. Romidepsin is a histone deacetylase inhibitor approved by the US Food and Drug Administration for patients with CTCL who have received ≥ 1 previous systemic therapy. In the present study, we examined the efficacy and safety of romidepsin in patients from the pivotal, single-arm, open-label, phase II study of relapsed or refractory CTCL with cutaneous tumors and/or folliculotropic disease involvement...
August 10, 2016: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/27637355/romidepsin-for-the-treatment-of-relapsed-refractory-cutaneous-t-cell-lymphoma-mycosis-fungoides-s%C3%A3-zary-syndrome-use-in-a-community-setting
#17
REVIEW
Sunil A Reddy
Cutaneous T-cell lymphoma (CTCL) is a heterogeneous group of rare non-Hodgkin lymphomas that arise in the skin. In advanced stages, CTCL becomes systemic and is associated with poor prognosis. Diagnosis of CTCL and treatment of early-stage disease with topical therapies often occurs under the care of a dermatologist. Community oncologists see few patients with CTCL due to direct referrals from dermatologists to academic or lymphoma specialty centers. However, some patients will continue to be managed in a community setting...
October 2016: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/27634769/thymic-stromal-chemokine-tslp-acts-through-th2-cytokine-production-to-induce-cutaneous-t-cell-lymphoma
#18
Naomi Takahashi, Makoto Sugaya, Hiraku Suga, Tomonori Oka, Makiko Kawaguchi, Tomomitsu Miyagaki, Hideki Fujita, Shinichi Sato
Thymic stromal lymphopoietin (TSLP) activates dendritic cells to induce Th2-mediated inflammation. Periostin, an extracellular matrix protein produced by fibroblasts, induces chronic inflammation by stimulating TSLP production. Recently, a reinforcing cycle linking Th2-type immune responses with periostin-induced keratinocyte activation has been proposed in atopic dermatitis pathogenesis. In this study, we investigated the role of TSLP and periostin in the development of cutaneous T cell lymphoma (CTCL), where Th2 cytokines and chemokines are also dominant...
September 6, 2016: Cancer Research
https://www.readbyqxmd.com/read/27630298/expression-of-cd31-in-mycosis-fungoides
#19
Alina Jankowska-Konsur, Christopher Kobierzycki, Jedrzej Grzegrzolka, Aleksandra Piotrowska, Agnieszka Gomulkiewicz, Natalia Glatzel-Plucinska, Mateusz Olbromski, Marzenna Podhorska-Okolow, Jacek C Szepietowski, Piotr Dziegiel
BACKGROUND/AIM: Mycosis fungoides (MF) is the most common primary cutaneous T-cell lymphoma (CTCL) characterized by malignant proliferation of mature T lymphocytes and primary skin involvement. Recent reports suggest that angiogenesis may play a role in the growth and spread of this malignancy. Cluster of differentiation 31 (CD31) is a protein classified into the Ig-superfamily of cell adhesion molecules, expressed on endothelial cells and majority of hematopoietic non-erythroid cells...
September 2016: Anticancer Research
https://www.readbyqxmd.com/read/27622024/investigating-potential-exogenous-tumor-initiating-and-promoting-factors-for-cutaneous-t-cell-lymphomas-ctcl-a-rare-skin-malignancy
#20
REVIEW
Ivan V Litvinov, Anna Shtreis, Kenneth Kobayashi, Steven Glassman, Matthew Tsang, Anders Woetmann, Denis Sasseville, Niels Ødum, Madeleine Duvic
Most skin malignancies are caused by external and often preventable environmental agents. Multiple reports demonstrated that cutaneous T-cell lymphomas (CTCL) can occur in married couples and cluster in families. Furthermore, recent studies document geographic clustering of this malignancy in Texas as well as in other areas of the United States. Multiple infectious, occupational, and medication causes have been proposed as triggers or promoters of this malignancy including hydrochlorothiazide diuretics, Staphylococcus aureus, dermatophytes, Mycobacterium leprae, Chlamydia pneumoniae, human T-Cell lymphotropic virus type 1 (HTLV1), Epstein-Barr virus (EBV), and herpes simplex virus (HSV)...
July 2016: Oncoimmunology
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