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skin associated lymphoid tissue

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https://www.readbyqxmd.com/read/29904388/niches-for-the-long-term-maintenance-of-tissue-resident-memory-t-cells
#1
REVIEW
Shiki Takamura
Tissue-resident memory T cells (TRM cells) are a population of immune cells that reside in the lymphoid and non-lymphoid organs without recirculation through the blood. These important cells occupy and utilize unique anatomical and physiological niches that are distinct from those for other memory T cell populations, such as central memory T cells in the secondary lymphoid organs and effector memory T cells that circulate through the tissues. CD8+ TRM cells typically localize in the epithelial layers of barrier tissues where they are optimally positioned to act as sentinels to trigger antigen-specific protection against reinfection...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29897143/analysis-of-possible-structures-of-inducible-skin-associated-lymphoid-tissue-in-lupus-erythematosus-profundus
#2
Toshiaki Kogame, Ryosuke Yamashita, Masahiro Hirata, Tatsuki R Kataoka, Hisashi Kamido, Chiyuki Ueshima, Miho Matsui, Takashi Nomura, Kenji Kabashima
Lupus erythematosus profundus (LEP) is a variant of lupus erythematosus, involving the deep dermis and subcutaneous fat. LEP is characterized by the presence of lymphoid follicles (LF) and germinal centers (GC). However, it remains unknown whether these lymphoid structures correspond to the lymphoid tissues such as cutaneous tertiary lymphoid organs (TLO). Previously, we identified dynamically orchestrated cellular elements in murine contact dermatitis that resembled lymphoid structures, which we termed inducible skin-associated lymphoid tissues (iSALT)...
June 13, 2018: Journal of Dermatology
https://www.readbyqxmd.com/read/29765409/a-novel-secretory-vesicle-from-deer-antlerogenic-mesenchymal-stem-cell-conditioned-media-damsc-cm-promotes-tissue-regeneration
#3
Minkoo Seo, Jin-Chul Kim, Hyung-Ki Kim, Eun Wook Choi, Suyeong Jeong, Ki Chang Nam, Mihue Jang
Multipotent stem cells have the capacity to generate terminally differentiated cell types of each lineage; thus, they have great therapeutic potential for a wide variety of diseases. The most widely available stem cells are derived from human tissues, and their use for therapeutic application is limited by their high cost and low productivity. Herein, we report that conditioned media of mesenchymal stem cells (MSCs) isolated from deer antlers enhanced tissue regeneration through paracrine action via a combination of secreted growth factors and cytokines...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29689462/macaque-homologs-of-kaposi-s-sarcoma-associated-herpesvirus-kshv-infect-germinal-center-lymphoid-cells-epithelial-cells-in-skin-and-gastrointestinal-tract-and-gonadal-germ-cells-in-naturally-infected-macaques
#4
Helle Bielefeldt-Ohmann, A Gregory Bruce, Kellie Howard, Minako Ikoma, Margaret E Thouless, Timothy M Rose
We developed a set of rabbit antisera to characterize infections by the macaque RV2 rhadinovirus homologs of KSHV. We analyzed tissues from rhesus and pig-tailed macaques naturally infected with rhesus rhadinovirus (RRV) or Macaca nemestrina rhadinovirus 2 (MneRV2). Our study demonstrates that RV2 rhadinoviruses have a tropism for epithelial cells, lymphocytes and gonadal germ cells in vivo. We observed latent infections in both undifferentiated and differentiated epithelial cells with expression of the latency marker, LANA...
June 2018: Virology
https://www.readbyqxmd.com/read/29577920/interleukin-21-attenuates-fitc-induced-contact-hypersensitivity-response-via-regulation-of-dendritic-cell-function
#5
Hidetoshi Nara, Mikako Komatsu, Yuji Tekeda, Akemi Araki, Nasrin Akhter, Hironobu Asao
Interleukin-21 (IL-21) is mainly produced by activated CD4+ T cells and is involved in the activation of immune cells such as T cells and macrophages. In contrast, IL-21 suppresses dendritic cell maturation. We studied the effect of IL-21 in a mouse model of FITC-induced contact hypersensitivity (CHS) using IL-21 isoform transgenic mice (IL-21iso-Tg). Tissue inflammation at 24 hours after elicitation in IL-21iso-Tg mice was significantly weaker than that in wild type mice. In agreement with tissue inflammation, recruitment of CD4+ and CD8+ T cells, neutrophils, and macrophages into the inflamed tissue was decreased in IL-21iso-Tg mice...
March 22, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29484056/primary-hepatic-mucosa-associated-lymphoid-tissue-lymphoma-in-a-patient-with-no-chronic-liver-disease-case-report
#6
Cezar I Betianu, Augustin Dima, Giorgiana Pavaloiu
Extramarginal zone lymphoma of mucosa-associated lymphoid tissue (MALT) is a non-Hodgkin lymphoma of low-grade malignancy. The most common localization is the stomach, and the common nongastric sites are salivary glands, the skin, orbits, the conjunctiva, the lung, breasts, upper airways, other gastrointestinal sites, and the liver. Primary hepatic MALT lymphoma is a rare disease and the diagnostic can be challenging. The clinical presentation is nonspecific and may range from no symptoms to end-stage liver disease...
December 2017: Radiology Case Reports
https://www.readbyqxmd.com/read/29475902/-in-vivo-analysis-of-prostaglandins-induced-ocular-surface-and-periocular-adnexa-modifications-in-patients-with-glaucoma
#7
REVIEW
Silvio DI Staso, Luca Agnifili, Sara Cecannecchia, Angela DI Gregorio, Marco Ciancaglini
BACKGROUND/AIM: Prostaglandin analogues (PGAs) are a first-line medical treatment for glaucoma because of their powerful intraocular pressure (IOP) lowering effect, few systemic side-effects (SEs), and the once daily administration. Despite the high systemic safety profile, the chronic use of PGAs may induce periocular and ocular surface (OS)-related side effects, which affect a significant proportion of glaucomatous patients. In this review, we summarize the current knowledge about SEs of PGAs on periocular structures and OS, and their implications in clinical practice...
March 2018: In Vivo
https://www.readbyqxmd.com/read/29466758/t-cells-in-nonlymphoid-tissues-give-rise-to-lymph-node-resident-memory-t-cells
#8
Lalit K Beura, Sathi Wijeyesinghe, Emily A Thompson, Marissa G Macchietto, Pamela C Rosato, Mark J Pierson, Jason M Schenkel, Jason S Mitchell, Vaiva Vezys, Brian T Fife, Steven Shen, David Masopust
Immunosurveillance of secondary lymphoid organs (SLO) is performed by central memory T cells that recirculate through blood. Resident memory T (Trm) cells remain parked in nonlymphoid tissues and often stably express CD69. We recently identified Trm cells within SLO, but the origin and phenotype of these cells remains unclear. Using parabiosis of "dirty" mice, we found that CD69 expression is insufficient to infer stable residence of SLO Trm cells. Restimulation of nonlymphoid memory CD8+ T cells within the skin or mucosa resulted in a substantial increase in bona fide Trm cells specifically within draining lymph nodes...
February 20, 2018: Immunity
https://www.readbyqxmd.com/read/29452667/overview-on-the-management-of-non-gastric-malt-lymphomas
#9
REVIEW
Irene Defrancesco, Luca Arcaini
Extranodal marginal zone B-cell lymphomas (EMZLs) of the mucosa-associated lymphoid tissue (MALT) are indolent lymphomas which can present at any extranodal site. The most frequent localizations (other than stomach) are ocular adnexa, salivary gland, skin, lung and thyroid. Chronic inflammation and antigenic stimulation are a potential risk for the development of MALT lymphomas. While Helicobacter Pylori (HP) is known to be associated with gastric MALT lymphoma and antibiotic therapy is effective in the setting of HP-positive, other microorganisms (such as Chlamydophila Psittaci, Campylobacter Jejiuni, Borrelia Burgdoferi) have been implicated in the pathogenesis of non-gastric MALT lymphomas...
March 2018: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/29316256/immunosuppressive-effect-of-the-gut-microbiome-altered-by-high-dose-tacrolimus-in-mice
#10
Z Zhang, L Liu, H Tang, W Jiao, S Zeng, Y Xu, Q Zhang, Z Sun, A Mukherjee, X Zhang, X Hu
The alterations induced in gut microbiota by tacrolimus may affect immune function and organ transplantation. Mice were treated with high-dose tacrolimus for 14 days. The fecal microbiota were analyzed by pyrosequencing the 16S rRNA genes, and the effect on metabolism was predicted using the sequence data. The subgroups of T cells in the serum, gut-associated lymphoid tissue, and draining lymph nodes were determined by flow cytometry. Tacrolimus treatment significantly altered the relative abundance of Allobaculum, Bacteroides, and Lactobacillus and CD4+ CD25hi FoxP3+ regulatory T cells in the colonic mucosa and the circulation...
January 9, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29241731/efficacy-of-lentivirus-mediated-gene-therapy-in-an-omenn-syndrome-recombination-activating-gene-2-mouse-model-is-not-hindered-by-inflammation-and-immune-dysregulation
#11
Valentina Capo, Maria Carmina Castiello, Elena Fontana, Sara Penna, Marita Bosticardo, Elena Draghici, Luigi P Poliani, Lucia Sergi Sergi, Rosita Rigoni, Barbara Cassani, Monica Zanussi, Paola Carrera, Paolo Uva, Kerry Dobbs, Nicolò Sacchetti, Luigi D Notarangelo, Niek P van Til, Gerard Wagemaker, Anna Villa
BACKGROUND: Omenn syndrome (OS) is a rare severe combined immunodeficiency associated with autoimmunity and caused by defects in lymphoid-specific V(D)J recombination. Most patients carry hypomorphic mutations in recombination-activating gene (RAG) 1 or 2. Hematopoietic stem cell transplantation is the standard treatment; however, gene therapy (GT) might represent a valid alternative, especially for patients lacking a matched donor. OBJECTIVE: We sought to determine the efficacy of lentiviral vector (LV)-mediated GT in the murine model of OS (Rag2R229Q/R229Q ) in correcting immunodeficiency and autoimmunity...
December 11, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29225710/novel-developments-in-the-pathogenesis-and-diagnosis-of-extranodal-marginal-zone-lymphoma
#12
REVIEW
Max I Schreuder, Michiel van den Brand, Konnie M Hebeda, Patricia J T A Groenen, J Han van Krieken, Blanca Scheijen
Extranodal marginal zone lymphoma (EMZL), mostly represented by mucosa-associated lymphoid tissue (MALT) type, also referred to as MALT lymphoma, is a clinically heterogeneous entity within the group of low-grade B cell lymphomas that arises in a wide range of different extranodal sites, including the stomach, lung, ocular adnexa, and skin. It represents the third most common non-Hodgkin lymphoma in the Western world, and the median age of occurrence is around 60 years. One characteristic aspect in a subset of EMZL detectable in about 25% of the cases is the presence of specific chromosomal translocations involving the genes MALT1 and BCL10 , which lead to activation of the NF-κB signaling pathway...
December 2017: Journal of Hematopathology
https://www.readbyqxmd.com/read/29207395/adiponectin-and-its-receptors-are-differentially-expressed-in-human-tissues-and-cell-lines-of-distinct-origin
#13
Simon Jasinski-Bergner, Maximilian Büttner, Dagmar Quandt, Barbara Seliger, Heike Kielstein
BACKGROUND: Adiponectin is secreted by adipose tissue and exerts high abundance and an anti-inflammatory potential. However, only little information exists about the expression profiles of adiponectin and its recently identified receptor CDH13 in non-tumorous human tissues and their association to clinical parameters. METHODS: The expression levels of adiponectin and CDH13 were analyzed in heart, liver, kidney, spleen, skin, blood vessels, peripheral nerve and bone marrow of 21 human body donors, in 12 human cell lines, and in purified immune effector cell populations of healthy blood donors by immunohistochemistry, Western-blot, and semi-quantitative PCR...
2017: Obesity Facts
https://www.readbyqxmd.com/read/29202802/histopathology-microbiology-and-the-inflammatory-process-associated-with-sarcoptes-scabiei-infection-in-the-iberian-ibex-capra-pyrenaica
#14
José Espinosa, Arián Ráez-Bravo, Jorge R López-Olvera, Jesús M Pérez, Santiago Lavín, Asta Tvarijonaviciute, Francisco J Cano-Manuel, Paulino Fandos, Ramón C Soriguer, José Enrique Granados, Diego Romero, Roser Velarde
BACKGROUND: Sarcoptic mange has been identified as the most significant infectious disease affecting the Iberian ibex (Capra pyrenaica). Despite several studies on the effects of mange on ibex, the pathological and clinical picture derived from sarcoptic mange infestation is still poorly understood. To further knowledge of sarcoptic mange pathology, samples from ibex were evaluated from histological, microbiological and serological perspectives. METHODS: Samples of skin, non-dermal tissues and blood were collected from 54 ibex (25 experimentally infected, 15 naturally infected and 14 healthy)...
December 4, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29093030/tissue-resident-lymphocytes-in-the-kidney
#15
Jan-Eric Turner, Martina Becker, Hans-Willi Mittrücker, Ulf Panzer
It has become evident that nonlymphoid tissues are populated by distinct subsets of innate and adaptive lymphocytes that are characterized by minimal exchange with recirculating counterparts. Especially at barrier sites, such as the skin, gut, and lung, these tissue-resident lymphocyte populations are ideally positioned to quickly respond to pathogens and other environmental stimuli. The kidney harbors several classes of innate and innate-like lymphocytes that have been described to contribute to this tissue-resident population in other organs, including innate lymphoid cells, natural killer cells, natural killer T cells, mucosal-associated invariant T cells, and γδ T cells...
February 2018: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28912020/intestinal-dysbiosis-featuring-abundance-of-ruminococcus-gnavus-associates-with-allergic-diseases-in-infants
#16
Huey-Huey Chua, Hung-Chieh Chou, Ya-Ling Tung, Bor-Luen Chiang, Chien-Chia Liao, Hong-Hsing Liu, Yen-Hsuan Ni
BACKGROUND & AIMS: Dysbiosis of the intestinal microbiota has been associated with development of allergies in infants. However, it is not clear what microbes might contribute to this process. We investigated what microbe(s) might be involved in analyses of infant twins and mice. METHODS: We studied fecal specimens prospectively in a twin cohort (n = 30) and age-matched singletons (n = 14) born at National Taiwan University Children's Hospital, Taipei, Taiwan, from April 2011 to March 2013...
January 2018: Gastroenterology
https://www.readbyqxmd.com/read/28910208/immunohistochemical-and-immunocytochemical-findings-associated-with-marek-s-disease-virus-in-naturally-infected-laying-hens
#17
O Yavuz, H Erer
We compared immunohistochemical (IHC) staining of tissue sections of liver, kidney, spleen, lung, proventriculus, sciatic nerve, bursa of Fabricius, brain, heart, intestine and skin; immunocytochemical (ICC) staining of peripheral blood samples and touch preparations of liver, spleen and kidney of laying hens naturally infected with Marek's disease (MD) virus. We used one hundred and fifty 5-17-week-old commercial hens. IHC and ICC staining were performed using polymer-based techniques. IHC staining exhibited mostly free immunopositive reactions in tumor cells and in the cytoplasm of the parenchymal cells of liver, kidney, spleen and bursa of Fabricius...
2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28882794/local-immune-response-of-two-mucosal-surfaces-of-the-european-seabass-dicentrarchus-labrax-fed-tryptophan-or-methionine-supplemented-diets
#18
R Azeredo, M Machado, F A Guardiola, R Cerezuela, A Afonso, H Peres, A Oliva-Teles, M A Esteban, B Costas
Immune responses relies on an adequate provision of multiple nutrients that sustain the synthesis of key effector molecules. These needs are depicted in the already reported increase of circulating free amino acids in fish under stressful conditions. Since aquaculture and the inherent fish welfare are an emergent call, the immunomodulatory effects of amino acids on gut- and skin-associated lymphoid tissues of the European seabass (Dicentrarchus labrax) were studied under unstressed conditions and after an inflammatory insult...
September 5, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28694862/primary-hepatic-marginal-zone-lymphoma-in-a-patient-with-chronic-hepatitis-c
#19
George S Gherlan, Razvan Stoia, Mihaly Enyedi, Camelia Dobrea, Petre I Calistru
Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT) is a low-grade malignant lymphoma that appears frequently in the stomach, but other sites can also be involved: the intestinal tract, lungs, head, neck, skin, thyroid, breasts and liver. Recently, epidemiological evidences support the idea that there is an association between hepatitis C and B-cell non-Hodgkin lymphomas (that include MALT as a subtype). Primary non-Hodgkin lymphomas confi ned only to the liver are very rare (only 0...
September 2016: Mædica
https://www.readbyqxmd.com/read/28505007/al-amyloidoma-of-the-skin-subcutis-cutaneous-amyloidosis-plasma-cell-dyscrasia-or-a-manifestation-of-primary-cutaneous-marginal-zone-lymphoma
#20
Noreen M Walsh, Ian Marie Lano, Peter Green, Christopher Gallant, Sylvia Pasternak, Thai Yen Ly, Luis Requena, Heinz Kutzner, Andreas Chott, Lorenzo Cerroni
It is unclear whether AL amyloidoma of the skin/subcutis represents a distinct entity, an indolent precursor of systemic amyloidosis, or a manifestation of cutaneous marginal zone lymphoma (cMZL). We collected 10 cases of cutaneous AL amyloidoma in order to better characterize the clinicopathologic features of this elusive entity (M:F=4:6; median age: 62.5 y, range: 31 to 82 y). Nine patients had a solitary nodule or plaque on the lower extremity (n=7), upper extremity (n=1), or chin (n=1). One patient had an AL amyloidoma on the right thigh and a second lesion on the right arm showing histopathologic features of cMZL without amyloid deposits...
August 2017: American Journal of Surgical Pathology
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