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tertiary lymphoid organ

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https://www.readbyqxmd.com/read/29777158/mesenchymal-stem-cells-and-t-cells-in-the-formation-of-tertiary-lymphoid-structures-in-lupus-nephritis
#1
S Esmaeil Dorraji, Aud-Malin K Hovd, Premasany Kanapathippillai, Gunnstein Bakland, Gro Østli Eilertsen, Stine L Figenschau, Kristin A Fenton
Tertiary lymphoid structures (TLS) develop in the kidneys of lupus-prone mice and systemic lupus erythematosus (SLE) patients with lupus nephritis (LN). Here we investigated the presence of mesenchymal stem cells (MSCs) in the development of TLS in murine LN, as well as the role of human MSCs as lymphoid tissue organizer (LTo) cells on the activation of CD4+ T cells from three groups of donors including Healthy, SLE and LN patients. Mesenchymal stem like cells were detected within the pelvic wall and TLS in kidneys of lupus-prone mice...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29740433/syk-inhibition-induces-apoptosis-in-germinal-center-like-b-cells-by-modulating-the-antiapoptotic-protein-myeloid-cell-leukemia-1-affecting-b-cell-activation-and-antibody-production
#2
Nathalie Roders, Florence Herr, Gorbatchev Ambroise, Olivier Thaunat, Alain Portier, Aimé Vazquez, Antoine Durrbach
B cells play a major role in the antibody-mediated rejection (AMR) of solid organ transplants, a major public health concern. The germinal center (GC) is involved in the generation of donor-specific antibody-producing plasma cells and memory B cells, which are often poorly controlled by current treatments. Myeloid cell leukemia-1 (Mcl-1), an antiapoptotic member of the B-cell lymphoma-2 family, is essential for maintenance of the GC reaction and B-cell differentiation. During chronic AMR (cAMR), tertiary lymphoid structures resembling GCs appear in the rejected organ, suggesting local lymphoid neogenesis...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29710102/association-of-t-and-b-cells-infiltrating-orbital-tissues-with-clinical-features-of-graves-orbitopathy
#3
Giovanna Rotondo Dottore, Liborio Torregrossa, Patrizio Caturegli, Ilaria Ionni, Angela Sframeli, Elena Sabini, Francesca Menconi, Paolo Piaggi, Stefano Sellari-Franceschini, Marco Nardi, Francesco Latrofa, Paolo Vitti, Claudio Marcocci, Fulvio Basolo, Michele Marinò
Importance: Graves orbitopathy (GO) responds to immunosuppressive treatments when clinically active but poorly when inactive. In other autoimmune diseases, response has been ascribed to a reduction in lymphocytes infiltrating the target organ. It is not known whether active vs inactive GO differs in this regard, which would help in understanding the link between GO immunologic features and clinical behavior. Objective: To investigate the association between orbital lymphocytic infiltrate and GO clinical features...
April 19, 2018: JAMA Ophthalmology
https://www.readbyqxmd.com/read/29683859/correlation-with-lymphocyte-infiltration-but-lack-of-prognostic-significance-of-meca-79-positive-high-endothelial-venules-in-primary-malignant-melanoma
#4
Tímea Sebestyén, Anita Mohos, Gabriella Liszkay, Beáta Somlai, István Gaudi, Andrea Ladányi
High endothelial venules (HEVs) are specialized vessels in lymphoid organs, supporting lymphocyte trafficking from the blood. As the presence of these vessels was described recently in tumors, it was proposed that they could facilitate the development of antitumor immune response, resulting in improved prognosis. The aim of our study was to analyze the correlation of the density of HEVs with that of the different immune cell types as well as with the clinicopathologic parameters and the disease outcomes in patients with cutaneous melanoma...
April 20, 2018: Melanoma Research
https://www.readbyqxmd.com/read/29674392/cholesterol-metabolism-promotes-b-cell-positioning-during-immune-pathogenesis-of-chronic-obstructive-pulmonary-disease
#5
Jie Jia, Thomas M Conlon, Rim Sj Sarker, Demet Taşdemir, Natalia F Smirnova, Barkha Srivastava, Stijn E Verleden, Gizem Güneş, Xiao Wu, Cornelia Prehn, Jiaqi Gao, Katharina Heinzelmann, Jutta Lintelmann, Martin Irmler, Stefan Pfeiffer, Michael Schloter, Ralf Zimmermann, Martin Hrabé de Angelis, Johannes Beckers, Jerzy Adamski, Hasan Bayram, Oliver Eickelberg, Ali Önder Yildirim
The development of chronic obstructive pulmonary disease (COPD) pathogenesis remains unclear, but emerging evidence supports a crucial role for inducible bronchus-associated lymphoid tissue (iBALT) in disease progression. Mechanisms underlying iBALT generation, particularly during chronic CS exposure, remain to be defined. Oxysterol metabolism of cholesterol is crucial to immune cell localization in secondary lymphoid tissue. Here, we demonstrate that oxysterols also critically regulate iBALT generation and the immune pathogenesis of COPD In both COPD patients and cigarette smoke (CS)-exposed mice, we identified significantly upregulated CH25H and CYP7B1 expression in airway epithelial cells, regulating CS-induced B-cell migration and iBALT formation...
April 19, 2018: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/29669284/manifold-roles-of-ccr7-and-its-ligands-in-the-induction-and-maintenance-of-bronchus-associated-lymphoid-tissue
#6
Henrike Fleige, Berislav Bosnjak, Marc Permanyer, Jasmin Ristenpart, Anja Bubke, Stefanie Willenzon, Gerd Sutter, Sanjiv A Luther, Reinhold Förster
The processes underlying the development and maintenance of tertiary lymphoid organs are incompletely understood. Using a Ccr7 knockout/knockin approach, we show that spontaneous bronchus-associated lymphoid tissue (BALT) formation can be caused by CCR7-mediated migration defects of dendritic cells (DCs) in the lung. Plt/plt mice that lack the CCR7 ligands CCL19 and CCL21-serine do not form BALT spontaneously because lung-expressed CCL21-leucine presumably suffices to maintain steady-state DC egress. However, plt/plt mice are highly susceptible to modified vaccinia virus infection, showing enhanced recruitment of immune cells as well as alterations in CCR7-ligand-mediated lymphocyte egress from the lungs, leading to dramatically enhanced BALT...
April 17, 2018: Cell Reports
https://www.readbyqxmd.com/read/29591536/sequence-typing-of-human-adenoviruses-isolated-from-polish-patients-subjected-to-allogeneic-hematopoietic-stem-cell-transplantation-a-single-center-experience
#7
Maciej Przybylski, Sylwia Rynans, Anna Waszczuk-Gajda, Jarosław Bilinski, Grzegorz W Basak, Wiesław W Jędrzejczak, Marta Wróblewska, Grażyna Młynarczyk, Tomasz Dzieciątkowski
PURPOSE: Human adenoviruses (HAdV) from species A, B and C are commonly recognized as pathogens causing severe morbidity and mortality in hematopoietic stem cell transplant (HSCT) recipients. The purpose of the present study was to determine HAdV types responsible for viremia in HSCT recipients at a large tertiary hospital in Poland. METHODS: Analysis of partial nucleotide sequences of HAdV hexon gene was used to type 40 clinical isolates of HAdV obtained from 40 HSCT recipients...
March 28, 2018: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/29567885/applicability-of-2008-world-health-organization-classification-system-of-hematolymphoid-neoplasms-learning-experiences
#8
Sushil Modkharkar, Pooja Navale, Pratibha Kadam Amare, Anuradha Chougule, Nikhil Patkar, Prashant Tembhare, Hari Menon, Manju Sengar, Navin Khattry, Shripad Banavali, Brijesh Arora, Gaurav Narula, Siddhartha Laskar, Nehal Khanna, Mary Ann Muckaden, Venkatesh Rangarajan, Archi Agrawal, Tanuja Shet, Sridhar Epari, P G Subramanian, Sumeet Gujral
Background: 2008 World Health Organization (WHO) classification of hematolymphoid neoplasms (HLN) has classified them based on morphology, results of various ancillary techniques, and clinical features.[1] There are no studies looking at the applicability of WHO classification. Aims: The aim of the study was to calculate proportions of all HLN subtypes seen during 1-year period based on 2008 WHO classification of HLN and study applicability and also shortcomings of practices in a tertiary care center in India...
January 2018: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/29538091/lymphoid-aggregates-in-desmoplastic-melanoma-have-features-of-tertiary-lymphoid-structures
#9
Anne M Stowman, Alexandra W Hickman, Ileana S Mauldin, Adela Mahmutovic, Alejandro A Gru, Craig L Slingluff
Desmoplastic melanomas (DM) have unique and challenging clinical presentations and histomorphology. A characteristic feature is the presence of scattered lymphoid aggregates. However, the nature of these aggregates is not defined. We hypothesized that they may be tertiary lymphoid structures (TLS), and may be associated with programmed death ligand 1 (PD-L1) expression. We searched our tissue database for 'pure' DMs and for scars as control tissues, collected clinical information, and reviewed H&E histology...
June 2018: Melanoma Research
https://www.readbyqxmd.com/read/29417587/hyperactive-gp130-stat3-driven-gastric-tumourigenesis-promotes-submucosal-tertiary-lymphoid-structure-development
#10
David G Hill, Liang Yu, Hugh Gao, Jesse J Balic, Alison West, Hiroko Oshima, Louise McLeod, Masanobu Oshima, Awen Gallimore, Kimberley D'Costa, Prithi S Bhathal, William Sievert, Richard L Ferrero, Brendan J Jenkins, Gareth W Jones
Tertiary lymphoid structures (TLSs) display phenotypic and functional characteristics of secondary lymphoid organs, and often develop in tissues affected by chronic inflammation, as well as in certain inflammation-associated cancers where they are prognostic of improved patient survival. However, the mechanisms that govern the development of tumour-associated TLSs remain ill-defined. Here, we observed tumour-associated TLSs in a preclinical mouse model (gp130F/F ) of gastric cancer, where tumourigenesis is dependent on hyperactive STAT3 signalling through the common IL-6 family signalling receptor, gp130...
February 8, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29299667/genetic-alterations-and-tumor-immune-attack-in-yo-paraneoplastic-cerebellar-degeneration
#11
Mathilde Small, Isabelle Treilleux, Coline Couillault, Daniel Pissaloux, Géraldine Picard, Sandrine Paindavoine, Valery Attignon, Qing Wang, Véronique Rogemond, Stéphanie Lay, Isabelle Ray-Coquard, Jacobus Pfisterer, Florence Joly, Andreas Du Bois, Dimitri Psimaras, Nathalie Bendriss-Vermare, Christophe Caux, Bertrand Dubois, Jérôme Honnorat, Virginie Desestret
Paraneoplastic cerebellar degenerations with anti-Yo antibodies (Yo-PCD) are rare syndromes caused by an auto-immune response against neuronal antigens (Ags) expressed by tumor cells. However, the mechanisms responsible for such immune tolerance breakdown are unknown. We characterized 26 ovarian carcinomas associated with Yo-PCD for their tumor immune contexture and genetic status of the 2 onconeural Yo-Ags, CDR2 and CDR2L. Yo-PCD tumors differed from the 116 control tumors by more abundant T and B cells infiltration occasionally organized in tertiary lymphoid structures harboring CDR2L protein deposits...
April 2018: Acta Neuropathologica
https://www.readbyqxmd.com/read/29218052/spoiling-for-a-fight-b-lymphocytes-as-initiator-and-effector-populations-within-tertiary-lymphoid-organs-in-autoimmunity-and-transplantation
#12
REVIEW
Jawaher Alsughayyir, Gavin J Pettigrew, Reza Motallebzadeh
Tertiary lymphoid organs (TLOs) develop at ectopic sites within chronically inflamed tissues, such as in autoimmunity and rejecting organ allografts. TLOs differ structurally from canonical secondary lymphoid organs (SLOs), in that they lack a mantle zone and are not encapsulated, suggesting that they may provide unique immune function. A notable feature of TLOs is the frequent presence of structures typical of germinal centers (GCs). However, little is known about the role of such GCs, and in particular, it is not clear if the B cell response within is autonomous, or whether it synergizes with concurrent responses in SLOs...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163490/immune-checkpoint-molecules-on-tumor-infiltrating-lymphocytes-and-their-association-with-tertiary-lymphoid-structures-in-human-breast-cancer
#13
Cinzia Solinas, Soizic Garaud, Pushpamali De Silva, Anaïs Boisson, Gert Van den Eynden, Alexandre de Wind, Paolo Risso, Joel Rodrigues Vitória, François Richard, Edoardo Migliori, Grégory Noël, Hugues Duvillier, Ligia Craciun, Isabelle Veys, Ahmad Awada, Vincent Detours, Denis Larsimont, Martine Piccart-Gebhart, Karen Willard-Gallo
There is an exponentially growing interest in targeting immune checkpoint molecules in breast cancer (BC), particularly in the triple-negative subtype where unmet treatment needs remain. This study was designed to analyze the expression, localization, and prognostic role of PD-1, PD-L1, PD-L2, CTLA-4, LAG3, and TIM3 in primary BC. Gene expression analysis using the METABRIC microarray dataset found that all six immune checkpoint molecules are highly expressed in basal-like and HER2-enriched compared to the other BC molecular subtypes...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29152550/tertiary-lymphoid-structures-associate-with-tumour-stage-in-urothelial-bladder-cancer
#14
Madhuri Koti, Amanda Shou Xu, Kevin Yi Mi Ren, Kash Visram, Runhan Ren, David M Berman, D Robert Siemens
Background: Urothelial bladder cancer (UBC) is a highly prevalent disease in North America, however its optimal management remains elusive. The contribution of B cell associated responses is poorly understood in bladder cancer. Lymphoid neogenesis is a hallmark of an active immune response at tumor sites that sometimes leads to formation of tertiary lymphoid structures (TLS) that resemble germinal centers formed in secondary lymphoid organs. Objective: This study was conducted with an aim to investigate the presence and characteristics of TLS in UBC with a focus to compare and contrast the TLS formation in treatment naive low grade non-muscle invasive (NMIBC) and muscle invasive bladder cancers (MIBC)...
October 27, 2017: Bladder Cancer
https://www.readbyqxmd.com/read/29125185/thymus-involvement-in-early-onset-myasthenia-gravis
#15
REVIEW
Mélanie A Cron, Solène Maillard, José Villegas, Frédérique Truffault, Muriel Sudres, Nadine Dragin, Sonia Berrih-Aknin, Rozen Le Panse
It has long been established that the thymus plays a central role in autoimmune myasthenia gravis (MG) because of either thymoma or thymic hyperplasia of lymphoproliferative origin. In this review, we discuss thymic changes associated with thymic hyperplasia and their implications in the development of an autoimmune response against the acetylcholine receptor (AChR).The hyperplastic MG thymus displays all the characteristics of tertiary lymphoid organs (TLOs): neoangiogenic processes with high endothelial venule and lymphatic vessel development, chemokine overexpression favoring peripheral cell recruitment, and ectopic germinal center development...
January 2018: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/29119288/renal-macrophages-and-dendritic-cells-in-sle-nephritis
#16
REVIEW
Naomi I Maria, Anne Davidson
PURPOSE OF REVIEW: The purpose of the study was to review the characteristics of renal macrophages and dendritic cells during homeostasis and disease, with a particular focus on lupus nephritis. RECENT FINDINGS: Resident renal macrophages derive from embryonic sources and are long-lived and self-renewing; they are also replaced from the bone marrow with age. The unique characteristics of macrophages in each tissue are imposed by the microenvironment and reinforced by epigenetic modifications...
November 9, 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/29106883/routine-pathologic-examination-of-tonsillectomy-specimens-a-10-year-experience-at-a-tertiary-care-children-s-hospital
#17
Jamie Glancy Bizzell, Gresham T Richter, Charles M Bower, Gail L Woods, Abby R Nolder
OBJECTIVE: To review histopathologic diagnoses from tonsillectomy specimens and determine whether routine pathologic exam is necessary. METHODS: Pathology reports of patients undergoing tonsillectomy from 2005 to 2014 at our pediatric tertiary care hospital were reviewed. Histopathologic diagnoses were recorded with special attention to identification of malignancy. RESULTS: A total of 8807 paired tonsil specimens were sent to pathology over a 10-year course...
November 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29078120/adventitial-tertiary-lymphoid-organ-classification-in-human-atherosclerosis
#18
Mohammadreza Akhavanpoor, Christian A Gleissner, Hamidreza Akhavanpoor, Felix Lasitschka, Andreas O Doesch, Hugo A Katus, Christian Erbel
BACKGROUND: Atherosclerosis is a chronic inflammatory disease of the arterial wall. Adjacent to lamina intima lesion progression, a cellular compound develops in the lamina adventitia, defined as tertiary lymphoid organs (TLO) in mice. But in human system, it remains unknown whether these adventitial cellular accumulations represent these highly organized immunological structures. PATIENTS AND METHODS: In this study, we investigated whether the adventitial cellular compounds represent TLOs in 72 human coronary artery samples by immunoenzyme staining...
January 2018: Cardiovascular Pathology: the Official Journal of the Society for Cardiovascular Pathology
https://www.readbyqxmd.com/read/28970832/use-of-toll-like-receptor-agonists-to-induce-ectopic-lymphoid-structures-in-myasthenia-gravis-mouse-models
#19
Marieke Robinet, Bérengère Villeret, Solène Maillard, Mélanie A Cron, Sonia Berrih-Aknin, Rozen Le Panse
Myasthenia gravis (MG) is an autoimmune disease mediated by autoantibodies against the acetylcholine receptor (AChR) at the neuromuscular junction. MG symptoms are characterized by muscle weaknesses. The thymus of MG patients is very often abnormal and possesses all the characteristics of tertiary lymphoid organs such as neoangiogenesis processes, overexpression of inflammatory cytokines and chemokines, and infiltration of B lymphocytes leading to ectopic germinal center (GC) development. We previously demonstrated that injections of mice with polyinosinic-polycytidylic acid [Poly(I:C)], a synthetic double-stranded RNA mimicking viral infection, induce thymic changes and trigger MG symptoms...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28875091/demographics-of-head-and-neck-cancer-patients-a-single-institution-experience
#20
George S Stoyanov, Martina Kitanova, Deyan L Dzhenkov, Peter Ghenev, Nikolay Sapundzhiev
Introduction Head and neck cancer (HNC) comprises a diverse group of oncological entities, originating from various tissue types and organ localizations, situated in the topographical regions of the head and neck (H&N). This single institution retrospective study was aimed at establishing the HNC patient demographics and categorizing the individual incidence of H&N malignancies, regarding their organ of origin and main histopathological type. Materials and methods All histologically verified cases of HNC from a single tertiary referral center were reviewed in a descriptive retrospective manner...
July 2, 2017: Curēus
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