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https://www.readbyqxmd.com/read/28625163/gamma-delta-%C3%AE-%C3%AE-t-cell-lymphoma-another-case-unclassifiable-by-world-health-organization-classification-a-case-report
#1
Hemant Sindhu, Ruqin Chen, Hui Chen, Jonathan Wong, Rashid Chaudhry, Yin Xu, Jen C Wang
BACKGROUND: We present a case of gamma-delta T-cell lymphoma that does not fit the current World Health Organization classifications. CASE PRESENTATION: A 74-year-old Caribbean-American woman presented with lymphocytosis, pruritus, and non-drenching night sweats. Bone marrow and peripheral blood analyses both confirmed the diagnosis of gamma-delta T-cell lymphoma. An axillary lymph node biopsy was negative for lymphoma. Clinically absent hepatosplenomegaly and skin lesions with biopsy-proven gamma-delta T-cell lymphoma suggest that she is unclassifiable within the current classification system...
June 19, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28619740/gamma-delta-t-cell-lymphoma-of-skin-eye-and-brain-presenting-with-visual-loss
#2
Nicholas Jones, Adam Gibb, Luciane Irion, Sarah Coupland
A young man presented with rapid, predominantly right-sided visual loss with a background of multifocal skin lesions. Visual acuity was right hand movements, left 6/5 Snellen, deteriorating to 6/38. He showed panuveitis with bilateral multifocal retinal infiltrates and retinal vasculitis. Multifocal brain lesions were identified. Biopsy of both skin and vitreous showed atypical lymphocytes, and immunohistochemistry confirmed T-cell lymphoma of gamma-delta subtype. Management with the CODOX-M/IVAC polychemotherapy regimen achieved rapid response including resolution of intraocular changes and substantial improvement of visual acuity to right 6/7...
June 15, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28566883/thiopurine-use-associated-with-reduced-b-and-natural-killer-cells-in-inflammatory-bowel-disease
#3
James D Lord, Donna M Shows
AIM: To identify which blood and mucosal lymphocyte populations are specifically depleted by thiopurine use in vivo. METHODS: The thiopurines azathioprine and 6-mercaptopurine have been a mainstay of inflammatory bowel disease (IBD) therapy for decades, but their mechanism of action in vivo remains obscure. Although thiopurines are lymphotoxic at high doses, and have been reported to cause T cell apoptosis in vitro, their ability to control IBD at lower doses suggests that they may selectively deplete particular lymphocyte populations...
May 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28562153/increased-frequencies-of-circulating-and-tumor-resident-v%C3%AE-1-t-cells-in-patients-with-diffuse-large-b-cell-lymphoma
#4
Emilie Reboursiere, Anne-Claire Gac, Anthony Garnier, Véronique Salaun, Oumedaly Reman, Anne-Dominique Pham, Quentin Cabrera, Kathy Khoy, Jean-Pierre Vilque, Christophe Fruchart, Sylvain Chantepie, Hyacinthe Johnson-Ansah, Margaret Macro, Stéphane Cheze, Khaled Benabed, Jean-Baptiste Mear, Xavier Troussard, Gandhi Damaj, Brigitte Le Mauff, Olivier Toutirais
Gamma-delta (γδ) T cells contribute to the innate immune response against cancer. In samples of 20 patients upon DLBCL diagnosis, we found that Vδ1(+) T cells were the major γδ T cell subset in tumors and PBMCs of patients, while Vδ2 T cells were preponderant in PBMCs of healthy subjects. Interestingly, the germinal center (GC) subtype was associated with an increase in Vδ1(+) T cells in tumors, whereas the non-GC subtype was associated with a lower frequency of γδ T cells. While circulating Vδ1(+) T cells of patients or HSs mostly exhibited a naïve phenotype, the majority of tumor Vδ1(+) T cells showed a central memory phenotype...
May 31, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28507072/recruitment-of-neutrophils-mediated-by-v%C3%AE-2-%C3%AE-%C3%AE-t-cells-deteriorate-liver-fibrosis-induced-by-schistosoma-japonicum-infection-in-c57bl-6-mice
#5
Li Zheng, Yuan Hu, Yanjuan Wang, Xibao Huang, Yuxin Xu, Yujuan Shen, Jianping Cao
Conventional adaptive T cell responses contribute to the pathogenesis of Schistosoma japonicum infection, leading to liver fibrosis. However, the role of gamma-delta (γδ) T cells in this disease is less clear. γδ T cells are known to secrete IL-17 in response to infection, exerting either protective or pathogenic functions. In the present study, mice infected with S. japonicum are used as a method to characterize the role of γδ T cells. Combined with the infection of S. japonicum, an extremely significant increase in the percentage of neutrophils in the CD45(+) cells was detected (from approximately 2...
May 15, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28497585/disseminated-cd8-positive-cd30-positive-cutaneous-lymphoproliferative-eruption-with-overlapping-features-of-mycosis-fungoides-and-primary-cutaneous-anaplastic-large-cell-lymphoma-following-remote-solitary-lesional-presentation
#6
Jonathan J Davick, Krishna Aj Mutgi, Karolyn A Wanat, Brian K Link, Vincent Liu
CD8-positive, CD30-positive cutaneous lymphoproliferative disorders comprise a rare subset of T-cell lymphoproliferative conditions, including variants of primary cutaneous anaplastic large cell lymphoma, mycosis fungoides, lymphomatoid papulosis type D, cutaneous gamma-delta T-cell lymphoma, and cutaneous peripheral T-cell lymphoma. These entities share overlapping clinical, histopathologic, and immunophenotypic features, presenting both a clinical and pathological diagnostic challenge. Presented here is a 73-year-old man with a disseminated, indolent CD30+, CD8+ cutaneous lymphoproliferative disorder with overlapping clinical and histopathological features of both mycosis fungoides and primary cutaneous anaplastic large cell lymphoma, as well as features of lymphomatoid papulosis...
May 12, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28494925/comparison-of-humoral-and-t-cell-mediated-immune-responses-to-a-single-dose-of-bovela-%C3%A2-live-double-deleted-bvdv-vaccine-or-to-a-field-bvdv-strain
#7
Ratree Platt, Lyle Kesl, Christian Guidarini, Chong Wang, James A Roth
The objective of this study was to determine and compare the humoral and cellular immune responses of calves exposed to a single dose of Bovela(®) bovine viral diarrhea virus (BVDV) live double deleted vaccine or a field strain virus (FSV) of BVDV type 2 (strain 890). Thirty seronegative, colostrum-deprived 5 month-old Holstein steer calves that tested negative for persistent BVDV by ear notch immunohistochemistry and seronegative to BVDV types 1 and 2 were used. Calves were screened by multi-parameter flow cytometry (MP-FCM) 1 week before vaccination to ensure that they were negative for T cell responses to the BVDV types 1 and 2 viruses in the Bovela(®) vaccine...
May 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/28475283/cd69-from-activation-marker-to-metabolic-gatekeeper
#8
REVIEW
Danay Cibrián, Francisco Sánchez-Madrid
CD69 is a membrane-bound, type II C-lectin receptor. It is a classical early marker of lymphocyte activation due to its rapid appearance on the surface of the plasma membrane after stimulation. CD69 is expressed by several subsets of tissue resident immune cells, including resident memory T (TRM) cells and gamma delta (γδ) T cells, and is therefore considered a marker of tissue retention. Recent evidence has revealed that CD69 regulates some specific functions of selected T-cell subsets, determining the migration-retention ratio as well as the acquisition of effector or regulatory phenotypes...
May 5, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28471481/cytotoxic-lymphocytes-and-atherosclerosis-significance-mechanisms-and-therapeutic-challenges
#9
Tin Kyaw, Karlheinz Peter, Li Yi, Peter Tipping, Ban-Hock Toh, Alex Bobik
Cytotoxic lymphocytes encompass natural killer (NK) lymphocytes (cells) and cytotoxic T cells that include CD8+ T cells, NKT cells, gamma, delta (γδ)-T cells and human CD4 + CD28- T cells. These cells play critical roles in inflammatory diseases and in controlling cancers and infections. Cytotoxic lymphocytes can be activated via a number of mechanisms that may involve dendritic cells, macrophages, cytokines or surface proteins on stressed cells. Upon activation, they secrete proinflammatory cytokines as well as anti-inflammatory cytokines, chemokines and cytotoxins to promote inflammation and development of atherosclerotic lesions including vulnerable lesions, which are strongly implicated in myocardial infarctions and strokes...
May 4, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28414669/a-case-of-hepatosplentic-t-cell-lymphoma-a-rare-aggressive-tumor-of-the-young
#10
S Cingam, S Patel, N Koshy
INTRODUCTION: Hepatosplenic T-cell lymphoma (HSTCL); is an unusual entity first described in 1990 that predominantly affects middle-aged men and is classified by WHO under peripheral T-cell lymphomas. We present a 26-year-old man with HSCTL treated with a non-CHOP regimen. CASE: A 26 year old immigrant from Cameroon without significant past medical history presented with abdominal discomfort that was first noted 1 month prior at which time he was elbowed in abdomen during a basketball game...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28414558/th17-inducing-conditions-lead-to-in-vitro-activation-of-both-th17-and-th1-responses-in-behcet-s-disease
#11
Rabia Deniz, Aysın Tulunay-Virlan, Filiz Ture Ozdemir, Ali Ugur Unal, Gulsen Ozen, Fatma Alibaz-Oner, Imren Aydin-Tatli, Gonca Mumcu, Tulin Ergun, Haner Direskeneli
OBJECTIVES: Interleukin-17 (IL-17) has been associated with the pathogenesis of various autoimmune/inflammatory diseases. The aim of this study was to investigate the expression of Th17-related immunity in an innate immunity-dominated vasculitis, namely Behcet's disease (BD). METHODS: Peripheral blood mononuclear cells from 37 patients (age: 38.5 ± 9.8 years) with BD, and 25 healthy controls (HC) (age: 39.1 ± 9.3 years), were cultured in Th17-inducing conditions (IL-6, Phytohemagglutinin (PHA), IL-1β, and IL-23) for 6 days...
April 17, 2017: Immunological Investigations
https://www.readbyqxmd.com/read/28392655/a-case-of-primary-cutaneous-gamma-delta-t-cell-lymphoma-with-pautrier-microabscess
#12
Kohei Kato, Takeshi Namiki, Makiko Ueno, Madoka Iikawa, Shown Tokoro, Aya Nishizawa, Kouhei Yamamoto, Keiko Miura, Hiroo Yokozeki
No abstract text is available yet for this article.
April 2017: Annals of Dermatology
https://www.readbyqxmd.com/read/28388924/enhancing-the-toolbox-to-study-il-17a-in-cattle-and-sheep
#13
Sean R Wattegedera, Yolanda Corripio-Miyar, Yvonne Pang, David Frew, Tom N McNeilly, Javier Palarea-Albaladejo, Colin J McInnes, Jayne C Hope, Elizabeth J Glass, Gary Entrican
The development of methods to detect cytokine expression by T cell subsets in ruminants is fundamental to strategic development of new livestock vaccines for prevention of infectious diseases. It has been possible to detect T cell expression of IFN-γ, IL-4 and IL-10 in ruminants for many years but methods to detect expression of IL-17A are relatively limited. To address this gap in capability we have cloned bovine and ovine IL-17A cDNAs and expressed biologically-active recombinant proteins in Chinese Hamster Ovary (CHO) cells...
April 8, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28362715/phenotypic-changes-and-impaired-function-of-peripheral-%C3%AE-%C3%AE-t-cells-in-patients-with-sepsis
#14
Xue-Lian Liao, Ting Feng, Jiang-Qian Zhang, Xing Cao, Qi-Hong Wu, Zhi-Chao Xie, Yan Kang, Hong Li
INTRODUCTION: Recent studies demonstrated the significant loss of gamma delta T (γδ T) cells in patients with sepsis. Given the distinct functions of γδ T cells in human anti-infection immunity, we are interested in evaluating the phenotype and function of peripheral γδ T cells in septic patients and determining their prognostic implication. METHOD: This prospective study has been conducted in three intensive care units (ICUs) of a university hospital. During the period from October 2014 to June 2015, we enrolled 107 patients who were consecutively admitted and diagnosed with severe sepsis or septic shock (excluding previous immunosuppression) and 45 healthy controls...
March 30, 2017: Shock
https://www.readbyqxmd.com/read/28331130/cytopenias-and-clonal-expansion-of-gamma-delta-t-cells-in-a-patient-with-anaplasmosis-a-potential-diagnostic-pitfall
#15
Daniel Marko, Anamarija M Perry, Arjuna Ponnampalam, Michel R Nasr
Human granulocytic anaplasmosis is a rare, tick-borne infectious disease caused by Anaplasma phagocytophilum. Herein, we report a rare case of human granulocytic anaplasmosis associated with cytopenias and clonal expansion of gamma/delta T-cells in the bone marrow. A 77-year old man presented multiple times to the emergency department complaining of muscle weakness. Complete blood count detected cytopenias and peripheral blood smear showed pseudo Pelger-Huet neutrophils. These findings prompted bone marrow evaluation with ancillary studies including flow cytometry, karyotyping and T-cell rearrangement studies...
2017: Journal of Clinical and Experimental Hematopathology: JCEH
https://www.readbyqxmd.com/read/28330983/gamma-delta-t-cells-mediate-angiotensin-ii-induced-hypertension-and-vascular-injury
#16
Antoine Caillon, Muhammad Oneeb Rehman Mian, Julio C Fraulob-Aquino, Ku-Geng Huo, Tlili Barhoumi, Sofiane Ouerd, Peter R Sinnaeve, Pierre Paradis, Ernesto L Schiffrin
Background -Innate antigen-presenting cells and adaptive immune T cells have been implicated in the development of hypertension. However, the T-lymphocyte subsets involved in the pathophysiology of hypertension remain unclear. A small subset of "innate-like" T cells expressing the γδ T cell receptor (TCR) rather than the αβ TCR could play a role in the initiation of the immune response in hypertension. We aimed to determine whether angiotensin (Ang) II caused kinetic changes in γδ T cells, whether deficiency in γδ T cells blunted Ang II-induced hypertension, vascular injury and T-cell activation, and whether γδ T cells are associated with human hypertension...
March 22, 2017: Circulation
https://www.readbyqxmd.com/read/28287518/isolation-and-flow-cytometric-analysis-of-human-endocervical-gamma-delta-t-cells
#17
Natasa Strbo, Laura Romero, Maria Alcaide, Margaret Fischl
The female reproductive tract (FRT) mucosal immune system serves as the first line of defense. Better knowledge of the genital mucosa is therefore essential for understanding pathogenicity of different pathogens including HIV. Gamma delta (GD) T cells are the prototype of 'unconventional' T cells and represent a relatively small subset of T cells defined by their expression of heterodimeric T-cell receptors (TCRs) composed of gamma and delta chains. This sets them apart from the classical and much better known CD4(+) helper T cells and CD8(+) cytotoxic T cells that are defined by alpha-beta TCRs...
February 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28280792/inhibition-of-interleukin-17-a-but-not-interleukin-17f-signaling-lowers-blood-pressure-and-reduces-end-organ-inflammation-in-angiotensin-ii-induced-hypertension
#18
Mohamed A Saleh, Allison E Norlander, Meena S Madhur
OBJECTIVES: To characterize the T cell subsets producing interleukin 17 (IL-17) isoforms A and F in hypertensive kidneys and vessels and determine whether inhibition of IL-17 signaling lowers blood pressure and end-organ damage in a mouse model of hypertension. BACKGROUND: T cell derived cytokines play a central role in the pathophysiology of hypertension and contribute to end-organ dysfunction. We previously showed that mice genetically deficient in IL-17A exhibited blunted hypertension and reduced renal and vascular dysfunction in response to angiotensin II (Ang II) infusion...
December 2016: JACC. Basic to Translational Science
https://www.readbyqxmd.com/read/28235627/florid-splenic-gamma-delta-t-cell-proliferation-in-patients-with-splenomegaly-and-cytopenias-a-high-stakes-diagnostic-challenge
#19
Shanxiang Zhang, Michael G Bayerl
OBJECTIVES: Splenic gamma/delta T-cell proliferation is rare and correct diagnosis is critical for adequate clinical management. METHODS: Two splenectomy cases from patients with splenomegaly and cytopenias were studied by morphological evaluation, extensive immunophenotyping, FISH and molecular studies. The clinicopathologic findings were compared with splenic T gamma/delta neoplasia, notably hepatosplenic T-cell lymphoma (HSTL) and T-cell large granular lymphocytic leukemia (TLGL) of the variety T gamma/delta...
February 21, 2017: Human Pathology
https://www.readbyqxmd.com/read/28228429/two-faces-of-gamma-delta-mycosis-fungoides-before-and-after-renal-transplantation
#20
Knut Erich Prillinger, Franz Trautinger, Melitta Kitzwögerer, Johanna Eder
We describe a patient with a 30-year history of mycosis fungoides (MF) and renal transplantation performed 3 years before he presented with an ulcerated tumour in the lumbosacral area. Biopsy revealed a lymphatic infiltrate of medium-sized, pleomorphic T cells expressing the gamma-delta T-cell receptor. Radiological staging and bone marrow biopsy revealed no extracutaneous involvement. Despite reduction in systemic immunosuppressants, total skin electron beam radiotherapy and systemic chemotherapy, the disease followed a highly aggressive course and the patient died 31 years after initial diagnosis of MF...
February 22, 2017: BMJ Case Reports
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