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https://www.readbyqxmd.com/read/28724724/brct-domain-protein-brit1-influences-class-switch-recombination
#1
Wei-Feng Yen, Ashutosh Chaudhry, Bharat Vaidyanathan, William T Yewdell, Joseph N Pucella, Rahul Sharma, Yulong Liang, Kaiyi Li, Alexander Y Rudensky, Jayanta Chaudhuri
DNA double-strand breaks (DSBs) serve as obligatory intermediates for Ig heavy chain (Igh) class switch recombination (CSR). The mechanisms by which DSBs are resolved to promote long-range DNA end-joining while suppressing genomic instability inherently associated with DSBs are yet to be fully elucidated. Here, we use a targeted short-hairpin RNA screen in a B-cell lymphoma line to identify the BRCT-domain protein BRIT1 as an effector of CSR. We show that conditional genetic deletion of BRIT1 in mice leads to a marked increase in unrepaired Igh breaks and a significant reduction in CSR in ex vivo activated splenic B cells...
July 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28705467/sarcoidosis-with-fever-and-a-splenic-infarct-due-to-cmv-or-lymphoma
#2
REVIEW
Burke A Cunha, Thulashie Sivarajah, Ismail Jimada
We present a case of an adult female with a past history of pulmonary sarcoidosis who presented with fever, night sweats, profound fatigue, and LUQ abdominal pain. Sarcoidosis is an afebrile disorder (excluding Lofgren's syndrome, Heerfordt's syndrome or neurosarcoidosis). Therefore, the presence of fever with sarcoidosis should suggest infection, usually viral, or lymphoma. Sarcoidosis-lymphoma syndrome describes the evolution of a lymphoma in long standing sarcoidosis. Fever aside, possible lymphoma is suggested by otherwise unexplained fever, pleural unilateral effusion, highly elevated ESR or ferritin levels...
July 10, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28704638/regulator-of-calcineurin-3-ameliorates-autoimmune-arthritis-by-suppressing-th17-cell-differentiation
#3
Jin-Sil Park, Jeong-Hee Jeong, Jae-Kyeong Byun, Mi-Ae Lim, Eun-Kyung Kim, Sung-Min Kim, Si-Young Choi, Sung-Hwan Park, Jun-Ki Min, Mi-La Cho
Regulator of calcineurin 3 (RCAN3), an endogenous regulator of the calcineurin-nuclear factor of activated T cells (NFAT) signaling pathway, inhibits the phosphatase activity of calcineurin, the nuclear translocation of NFAT, and the NFAT downstream pathway. To investigate the effects of RCAN3 on T-cell regulatory function and the development and progression of inflammatory arthritis, we studied the effects of RCAN3 transfection on regulation of Th17 cell differentiation in a murine T-lymphoma cell line and primary splenic CD4(+) T cells...
July 10, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28701397/b-cell-specific-atm-expression-promotes-chronic-gammaherpesvirus-infection
#4
Eric J Darrah, Joseph M Kulinski, Wadzanai P Mboko, Gang Xin, Laurent P Malherbe, Stephen B Gauld, Weiguo Cui, Vera L Tarakanova
Manipulation of host cellular pathways is a strategy employed by gammaherpesviruses, including mouse gammaherpesvirus 68 (MHV68), in order to negotiate a chronic infection. Ataxia-telangiectasia mutated (ATM) plays a unique yet incompletely understood role in gammaherpesvirus infection as it has both proviral and antiviral effects. Chronic gammaherpesvirus infection is poorly controlled in the host with global ATM insufficiency, whether the host is a mouse or a human. In contrast, ATM facilitates replication, reactivation, and latency establishment of several gammaherpesviruses in vitro, suggesting that ATM is proviral in the context of infected cell cultures...
July 12, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28679993/iatrogenic-immunodeficiency-associated-epstein-barr-virus-ebv-negative-natural-killer-cell-lymphoproliferative-disorder-in-a-patient-undergoing-rheumatoid-arthritis-therapy
#5
Tomoyuki Uchida, Morihiro Inoue, Jian Hua, Shogo Tajima, Yasunori Ota, Masao Hagihara
Here we present a patient with rheumatoid arthritis (RA), who was suspected to have developed malignant lymphoma during immunosuppressive therapy 5 years earlier. She temporarily achieved remission after discontinuing therapy; however, her disease worsened with remittent fever and splenomegaly. Splenic biopsy demonstrated infiltration by abnormal cells, which were positive for CD56 and T cell intracytoplasmic antigen, but negative for CD3 and Epstein-Barr virus (EBV) -encoded RNA. Cytogenetic analysis of bone marrow and lumbar spine tumor revealed common complex karyotype abnormalities...
2017: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/28664939/clinical-utility-of-recently-identified-diagnostic-prognostic-and-predictive-molecular-biomarkers-in-mature-b-cell-neoplasms
#6
REVIEW
Arantza Onaindia, L Jeffrey Medeiros, Keyur P Patel
Genomic profiling studies have provided new insights into the pathogenesis of mature B-cell neoplasms and have identified markers with prognostic impact. Recurrent mutations in tumor-suppressor genes (TP53, BIRC3, ATM), and common signaling pathways, such as the B-cell receptor (CD79A, CD79B, CARD11, TCF3, ID3), Toll-like receptor (MYD88), NOTCH (NOTCH1/2), nuclear factor-κB, and mitogen activated kinase signaling, have been identified in B-cell neoplasms. Chronic lymphocytic leukemia/small lymphocytic lymphoma, diffuse large B-cell lymphoma, follicular lymphoma, mantle cell lymphoma, Burkitt lymphoma, Waldenström macroglobulinemia, hairy cell leukemia, and marginal zone lymphomas of splenic, nodal, and extranodal types represent examples of B-cell neoplasms in which novel molecular biomarkers have been discovered in recent years...
June 30, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28660219/seventy-fdg-pet-ct-cases-in-which-nuclear-medicine-physicians-suspected-lymphoma-how-reliable-are-we
#7
Akira Toriihara, Masashi Nakadate, Shin Nakamura, Kazunori Kubota, Ukihide Tateishi
OBJECTIVES: To validate the reliability of nuclear medicine physicians in diagnosing lymphoma using positron emission tomography/computed tomography using 2-deoxy-2-[(18)F]fluoro-D-glucose (FDG-PET/CT) and to determine findings that reliably suggest lymphoma. METHODS: Seventy patients suspected of having lymphoma using FDG-PET/CT were enrolled in this retrospective study. Two nuclear medicine physicians read all the interpretation reports and graded the degree of suspicion by consensus (3: definitely suspicious, 2: probably suspicious, and 1: possibly suspicious)...
2017: Asia Oceania Journal of Nuclear Medicine & Biology
https://www.readbyqxmd.com/read/28642818/nivolumab-as-salvage-treatment-in-a-patient-with-hiv-related-relapsed-refractory-hodgkin-lymphoma-and-liver-failure-with-encephalopathy
#8
Jose D Sandoval-Sus, Francis Mogollon-Duffo, Ankita Patel, Nathan Visweshwar, Damian A Laber, Richard Kim, Michael V Jagal
BACKGROUND: We report the first case to our knowledge of a patient with relapsed/refractory classical hodgkin lymphoma and liver failure with encephalopathy along with human immunodeficiency virus/acquired immunodeficiency syndrome infection, successfully treated with nivolumab without major side effects and encouraging prolonged disease control. CASE PRESENTATION: In December 2015, at the time of the patient's progression from his Hodgkin lymphoma after fourth line treatment, he developed persistent fevers, abdominal distension, jaundice and worsening of his liver function tests...
2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/28626260/a-case-of-api2-malt1-positive-gastric-malt-lymphoma-with-concomitant-diffuse-large-b-cell-lymphoma
#9
Akashi Fujita, Masahiro Tajika, Tsutomu Tanaka, Makoto Ishihara, Yutaka Hirayama, Nobumasa Mizuno, Kazuo Hara, Susumu Hijioka, Hiroshi Imaoka, Tsukasa Yoshida, Nozomi Okuno, Nobuhiro Hieda, Takashi Hirayama, Hitoshi Shibuya, Hisashi Kondo, Hirotaka Suzuki, Kazuhiro Toriyama, Yasushi Yatabe, Kenji Yamao, Yasumasa Niwa
API2-MALT1 translocation-positive gastric marginal zone lymphomas of mucosa-associated lymphoid tissue (MALT) lymphoma is thought to transform to diffuse large B-cell lymphoma (DLBCL) rarely. A 69-year-old man presented with epigastralgia. Esophagogastroduodenoscopy showed multiple ulcerations in the stomach. Endoscopic biopsies revealed MALT lymphoma, with Helicobacter pylori infection. The patient underwent eradication therapy with no improvement, and was thereafter followed without additional therapy at his request...
February 2017: Nagoya Journal of Medical Science
https://www.readbyqxmd.com/read/28611188/new-quantitative-features-for-the-morphological-differentiation-of-abnormal-lymphoid-cell-images-from-peripheral-blood
#10
Laura Puigví, Anna Merino, Santiago Alférez, Andrea Acevedo, José Rodellar
AIMS: This work aims to propose a set of quantitative features through digital image analysis for significant morphological qualitative features of different cells for an objective discrimination among reactive, abnormal and blast lymphoid cells. METHODS: Abnormal lymphoid cells circulating in peripheral blood in chronic lymphocytic leukaemia, B-prolymphocytic leukaemia, hairy cell leukaemia, splenic marginal zone lymphoma, mantle cell lymphoma, follicular lymphoma, T-prolymphocytic leukaemia, T large granular lymphocytic leukaemia and Sézary syndrome, normal, reactive and blast lymphoid cells were included...
June 13, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28607806/significance-of-stromal-1-and-stromal-2-signatures-and-biologic-prognostic-model-in-diffuse-large-b-cell-lymphoma
#11
Asmaa Gaber Abdou, Nancy Asaad, Mona Kandil, Mohammed Shabaan, Asmaa Shams
OBJECTIVE: : Diffuse Large B Cell Lymphoma (DLBCL) is a heterogeneous group of tumors with different biological and clinical characteristics that have diverse clinical outcomes and response to therapy. Stromal-1 signature of tumor microenvironment of DLBCL represents extracellular matrix deposition and histiocytic infiltrate, whereas stromal-2 represents angiogenesis that could affect tumor progression. METHODS: : The aim of the present study is to assess the significance of stromal-1 signature using SPARC-1 and stromal-2 signature using CD31 expression and then finally to construct biologic prognostic model (BPM) in 60 cases of DLBCL via immunohistochemistry...
May 2017: Cancer Biology & Medicine
https://www.readbyqxmd.com/read/28596157/-18-f-fdg-pet-and-ct-scan-detect-new-imaging-patterns-of-response-and-progression-in-patients-with-hodgkin-lymphoma-treated-by-anti-pd1-immune-checkpoint-inhibitor
#12
Laurent Dercle, Romain-David Seban, Julien Lazarovici, Lawrence Schwartz, Roch Houot, Samy Ammari, Alina Danu, Véronique Edeline, Aurélien Marabelle, Vincent Ribrag, Jean-Marie Michot
The response evaluation criteria in patients with Hodgkin Lymphoma (HL) were designed for the assessment of chemotherapy and targeted molecular agents. We investigated the accuracy of 3-month-(18)F-FDG-PET/CT for the identification of HL patients (pts) responding to immune-checkpoint blockade by Anti-Programmed Death 1 antibodies (anti-PD1). We also reported the frequency of new immune patterns of response and progression. Methods: Retrospectively, we recruited consecutive HL patients treated by anti-PD1 (Pembrolizumab or Nivolumab) at Gustave Roussy, Villejuif, France, from 2013-2015...
June 8, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28579851/transformation-of-follicular-lymphoma-to-a-high-grade-b-cell-lymphoma-with-myc-and-bcl2-translocations-and-overlapping-features-of-burkitt-lymphoma-and-acute-lymphoblastic-leukemia-a-case-report-and-literature-review
#13
Alina M Bischin, Russell Dorer, David M Aboulafia
Most commonly, histologic transformation (HT) from follicular lymphoma (FL) manifests as a diffuse large B-cell lymphoma, not otherwise specified (DLBCL, NOS). Less frequently, HT may result in a high-grade B-cell lymphoma (HGBL) with MYC and B-cell lymphoma protein 2 (BCL2) and/or BCL6 gene rearrangements, also known as "double-hit" or "triple-hit" lymphomas. In the 2016 revision of the World Health Organization (WHO) classification of lymphoid neoplasms, the category B-cell lymphoma, unclassifiable was eliminated due to its vague criteria and limiting diagnostic benefit...
2017: Clinical Medicine Insights. Blood Disorders
https://www.readbyqxmd.com/read/28577652/splenic-marginal-zone-lymphoma-a-literature-review-of-diagnostic-and-therapeutic-challenges
#14
Tayse Silva Dos Santos, Renato Sampaio Tavares, Danielle Leão Cordeiro de Farias
Splenic marginal zone lymphoma (SMZL) is a low-grade B-cell non-Hodgkin's lymphoma characterized by massive splenomegaly, moderate lymphocytosis with or without villous lymphocytes, rare involvement of peripheral lymph nodes and indolent clinical course. As a rare disease, with no randomized prospective trials, there is no standard of care for SMZL so far. Splenectomy has been done for many years as an attempt to control disease, but nowadays it has not been encouraged as first line because of new advances in therapy as rituximab, that are as effective with minimal toxicity...
April 2017: Revista Brasileira de Hematologia e Hemoterapia
https://www.readbyqxmd.com/read/28566677/high-grade-transformation-in-a-splenic-marginal-zone-lymphoma-with-a-cerebral-manifestation
#15
Xiaoning Gao, Jie Li, Ji Lin, Daihong Liu, Li Yu, Quanshun Wang
BACKGROUND Splenic marginal zone lymphomas (SMZLs) are generally uncommon, indolent lymphomas that typically affect older adults, but the development of the transformation to high-grade lymphoma may occur in a small proportion of patients and represents a rare event with blastic cell infiltration in the lymph nodes and bone marrow. CASE REPORT Here, we present a young adult patient who was diagnosed with a SMZL and developed a high-grade transformation to diffuse large B cell lymphoma (DLBCL) with central nervous system involvement...
June 1, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28540094/diagnosis-of-splenic-lymphoma-by-endoscopic-ultrasound-guided-fine-needle-aspiration-a-case-report-and-review-of-the-literature
#16
Umar Darr, Zubair Khan, Muhammad Ali Khan, Anas Renno, Turki Alkully, Sehrish Kamal, Tariq Hammad, Yaseen Alastal, Muhammad Imran Khan, Ali Nawras
Introduction. Splenic tumor is usually found as an incidental finding on CT of abdomen. Traditionally, ultrasound (US) or computed tomography (CT) guided biopsies were employed for the purpose of sampling; however they have been reported to have a complication rate of 5.3%. Endoscopic ultrasound-fine needle aspiration (EUS-FNA) has been recently utilized for the purpose of sampling splenic tumors. In literature there are 7 reported instances where splenic lymphoma was diagnosed using EUS-FNA. We present a case of follicular B cell lymphoma of the spleen diagnosed using EUS-FNA...
2017: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/28533834/-splenic-marginal-zone-lymphoma
#17
Sinaa Mohamed
Splenic marginal zone lymphoma (SMZL) is a rare B-cell lymphoma, well defined according to the 2016 WHO classification of tumors of the hematopoietic tissue, which can raise diagnostic problems. We report the case of a 72-year old patient, hospitalised for exploration of a massive splenomegaly confirmed by computed tomography (CT). Laboratory tests were normal. The patient underwent splenectomy. Microscopic examination of the surgical specimen showed widespread lymphomatous proliferation in small cells associated with CD20 marker...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28533651/primary-germ-cell-tumor-of-testes-with-extensive-lymph-nodal-and-splenic-metastases-masquerading-lymphoma-on-18-f-fdg-pet-ct
#18
Sarthak Tripathy, Anirban Mukherjee, Chandrasekhar Bal, Madhavi Tripathi, Saumyaranjan Mallick, Shamim Ahmed Shamim
Germ cell tumors (GCT) account for the 95% of the malignancies associated with testes. They are the most common solid malignancies affecting the males in the age group of 15-35 years. It is known to be bilateral in 3% of cases. We herein present FDG PET-CT findings of a case with biopsy proven GCT with multiple lymph nodal and splenic metastases mimicking lymphomatous neoplasm.
April 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28522570/clinical-and-diagnostic-relevance-of-notch2-and-klf2-mutations-in-splenic-marginal-zone-lymphoma
#19
Yolanda Campos-Martín, Nerea Martínez, Azahara Martínez-López, Laura Cereceda, Felipe Casado, Patrocinio Algara, David Oscier, Francisco J Menarguez, Juan F García, Miguel A Piris, Manuela Mollejo
No abstract text is available yet for this article.
May 18, 2017: Haematologica
https://www.readbyqxmd.com/read/28522441/encouraging-activity-for-r-chop-in-advanced-stage-nodular-lymphocyte-predominant-hodgkin-lymphoma
#20
Michelle A Fanale, Chan Yoon Cheah, Amy Rich, L Jeffrey Medeiros, Chao-Ming Lai, Yasuhiro Oki, Jorge E Romaguera, Luis Fayad, F B Hagemeister, Felipe Samaniego, Maria A Rodriguez, Sattva S Neelapu, Hun J Lee, Loretta Nastoupil, Nathan Fowler, Francesco Turturro, Jason Westin, Michael Wang, Peter McLaughlin, Chelsea Pinnix, Sarah Milgrom, Bouthaina Dabaja, Sandra B Horowitz, Anas Younes
Nodular lymphocyte Hodgkin lymphoma (NLPHL) is a rare disease for which the optimal therapy is unknown. We hypothesized R-CHOP could decrease rates of relapse and transformation. We retrospectively reviewed patients with NLPHL diagnosed between 1995 and 2015 confirmed by central pathologic review. Fifty-nine had sufficient treatment and follow-up data for analysis. We described progression-free (PFS), overall survival (OS) and histologic transformation according to treatment strategy and explorede prognostic factors for PFS and OS...
May 18, 2017: Blood
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