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https://www.readbyqxmd.com/read/28930685/human-tissue-resident-memory-t-cells-are-defined-by-core-transcriptional-and-functional-signatures-in-lymphoid-and-mucosal-sites
#1
Brahma V Kumar, Wenji Ma, Michelle Miron, Tomer Granot, Rebecca S Guyer, Dustin J Carpenter, Takashi Senda, Xiaoyun Sun, Siu-Hong Ho, Harvey Lerner, Amy L Friedman, Yufeng Shen, Donna L Farber
Tissue-resident memory T cells (TRMs) in mice mediate optimal protective immunity to infection and vaccination, while in humans, the existence and properties of TRMs remain unclear. Here, we use a unique human tissue resource to determine whether human tissue memory T cells constitute a distinct subset in diverse mucosal and lymphoid tissues. We identify a core transcriptional profile within the CD69(+) subset of memory CD4(+) and CD8(+) T cells in lung and spleen that is distinct from that of CD69(-) TEM cells in tissues and circulation and defines human TRMs based on homology to the transcriptional profile of mouse CD8(+) TRMs...
September 19, 2017: Cell Reports
https://www.readbyqxmd.com/read/28927891/vitiligo-skin-is-imprinted-with-resident-memory-cd8-t-cells-expressing-cxcr3
#2
Katia Boniface, Clément Jacquemin, Anne-Sophie Darrigade, Benoît Dessarthe, Christina Martins, Nesrine Boukhedouni, Charlotte Vernisse, Alexis Grasseau, Denis Thiolat, Jérôme Rambert, Fabienne Lucchese, Antoine Bertolotti, Khaled Ezzedine, Alain Taieb, Julien Seneschal
Vitiligo is a chronic auto-immune depigmenting skin disorder that results from a loss of melanocytes. Multiple combinatorial factors have been involved in disease development, with a prominent role of the immune system, in particular T cells. After repigmentation, vitiligo frequently recurs in the same area, suggesting that vitiligo could involve the presence of resident memory T cells (TRM). We sought to perform a thorough characterization of the phenotype and function of skin memory T cells in vitiligo. We show that stable and active vitiligo perilesional skin is enriched with a population of CD8 TRM expressing both CD69 and CD103 compared to psoriasis and control unaffected skin...
September 16, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28920832/salinifilum-gen-nov-with-description-of-salinifilum-proteinilyticum-sp-nov-an-extremely-halophilic-actinomycete-isolated-from-meighan-wetland-iran-and-reclassification-of-saccharopolyspora-aidingensis-as-salinifilum-aidingensis-comb-nov-and-saccharopolyspora
#3
Mahdi Moshtaghi Nikou, Mohaddaseh Ramezani, Sharareh Harirchi, Somayyeh Makzoom, Mohammad Ali Amoozegar, Seyed Abolhassan Shahzadeh Fazeli, Peter Schumann, Antonio Ventosa
A Gram-positive, halophilic actinobacterial strain Miq-12T was isolated from Meighan wetland in Iran. Strain Miq-12T was strictly aerobic, catalase positive and oxidase negative. The isolate grew at 12-25 % NaCl, at 30-50 °C and pH 5.5-10.5. The optimum NaCl, temperature and pH for growth were 15-20 %, 40 °C and 7.0-8.0, respectively. The cell wall of strain Miq-12T contained meso-diaminopimelic acid as diagnostic diamino acid and arabinose as whole-cell sugar. The polar lipid pattern consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine and phosphatidylinositol...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28914433/platelet-transfusion-refractoriness-after-t-cell-replete-haploidentical-transplantation-is-associated-with-inferior-clinical-outcomes
#4
Qiang Fu, Lanping Xu, Xiaohui Zhang, Yu Wang, Yingjun Chang, Kaiyan Liu, Xiaojun Huang
Haploidentical stem cell transplantation (haplo-SCT) has been an alternative source of bone marrow for patients without human leukocyte antigen (HLA)-matched donors. The aim of this study was to investigate the relationships between platelet transfusion refractoriness (PTR) and clinical outcomes in the setting of haplo-SCT. Between May 2012 and March 2014, 345 patients who underwent unmanipulated haplo-SCT were retrospectively enrolled. PTR occurred in 20.6% of all patients. Patients in the PTR group experienced higher transplant-related mortality (TRM, 43...
September 13, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28910403/polymicrobial-sepsis-impairs-bystander-recruitment-of-effector-cells-to-infected-skin-despite-optimal-sensing-and-alarming-function-of-skin-resident-memory-cd8-t-cells
#5
Derek B Danahy, Scott M Anthony, Isaac J Jensen, Stacey M Hartwig, Qiang Shan, Hai-Hui Xue, John T Harty, Thomas S Griffith, Vladimir P Badovinac
Sepsis is a systemic infection that enhances host vulnerability to secondary infections normally controlled by T cells. Using CLP sepsis model, we observed that sepsis induces apoptosis of circulating memory CD8 T-cells (TCIRCM) and diminishes their effector functions, leading to impaired CD8 T-cell mediated protection to systemic pathogen re-infection. In the context of localized re-infections, tissue resident memory CD8 T-cells (TRM) provide robust protection in a variety of infectious models. TRM rapidly 'sense' infection in non-lymphoid tissues and 'alarm' the host by enhancing immune cell recruitment to the site of the infection to accelerate pathogen clearance...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28906550/efficacy-and-safety-of-autologous-haematopoietic-stem-cell-transplantation-in-systemic-sclerosis-a-systematic-review-of-literature
#6
A Eyraud, L Scouppe, T Barnetche, E Forcade, E Lazaro, P Duffau, C Richez, J Seneschal, M-E Truchetet
We aimed at assessing the efficacy of autologous haematopoietic stem cell transplantation (HSCT) for skin sclerosis and lung function in systemic sclerosis (SSc). We performed a systematic literature review in the Pubmed and Scopus databases from the earliest records to March 2016. We assessed quality using the Cochrane tool for randomized studies, Newcastle-Ottawa scale for controlled-cohort studies and an 18-item quality appraisal checklist for case series. The primary outcome was the improvement of skin thickening using the modified Rodnan Skin Score (mRSS)...
September 14, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28895206/in-patient-versus-out-patient-autologous-hematopoietic-stem-cell-transplantation-for-multiple-myeloma
#7
Nina Shah, A Megan Cornelison, Rima Saliba, Sairah Ahmed, Yago L Nieto, Qaiser Bashir, Simrit Parmar, Chitra Hosing, Uday Popat, Elizabeth J Shpall, Richard E Champlin, Muzaffar Qazilbash
BACKGROUND: High dose chemotherapy and autologous hematopoietic stem cell transplantation (auto-HCT) is commonly performed for multiple myeloma (MM) patients and may be as safe in the out-patient setting as in the in-patient setting. METHODS: We performed a single-center retrospective analysis of all MM patients undergoing auto-HCT between January 2008 - December 2012. We categorized patients as out-patient versus in-patient auto-HCT and compared clinical characteristics and outcomes between the groups...
September 12, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28872670/tcr-pmhc-encounter-differentially-regulates-transcriptomes-of-tissue-resident-cd8-t-cells
#8
Akihiro Yoshikawa, Kevin Bi, Derin B Keskin, Guanglang Zhang, Bruce Reinhold, Ellis L Reinherz
To investigate the role of TCR-pMHC interaction in regulating lung CD8 tissue-resident T cell (TR ) differentiation, polyclonal responses were compared against NP366-374 /D(b) and PA224-233 /D(b) , two immunodominant epitopes that arise during influenza A infection in mice. Memory niches distinct from iBALTs develop within the lamina propria, supporting CD103+ and CD103- CD8 TR generation and intraepithelial translocation. Gene set enrichment analysis (GSEA) and weighted gene co-expression network analysis (WGCNA) identify dominant TCR, adherence junction, RIG-I-like and NOD-like pattern recognition receptor as well as TGFβ signaling pathways and memory signatures among PA224-233 /D(b) T cells consistent with T resident memory (TRM ) status...
September 5, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28870778/outcome-analysis-of-pediatric-all-patients-treated-with-tbi-free-allogeneic-hematopoietic-stem-cell-transplantation-comparison-of-patients-with-and-without-central-nervous-system-involvement
#9
Amir Ali Hamidieh, Seyed Mostafa Monzavi, Maryam Kaboutari, Maryam Behfar, Mohsen Esfandbod
Conditioning regimens excluding total body irradiation (TBI) following by hematopoietic stem cell transplantation (HSCT) have been shown to be feasible in treating acute lymphoblastic leukemia (ALL). However, it is commonly believed that for extramedullary involvements of ALL in sanctuary sites such as central nervous system (CNS), TBI shall not be abandoned. In this study, the outcomes of pediatric ALL patients with (CNS(+)) and without CNS involvement (CNS(-)) treated with a TBI-free allogeneic HSCT were retrospectively compared...
September 1, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28869416/autologous-stem-cell-transplantation-in-systemic-sclerosis-a-systematic-review
#10
REVIEW
Lauren Host, Mandana Nikpour, Alicia Calderone, Paul Cannell, Janet Roddy
OBJECTIVES: Haematopoetic autologous stem cell transplantation (ASCT) has emerged as a treatment option for patients with refractory, severe autoimmune disease. This is a systematic review of the current literature on ASCT in adult patients with systemic sclerosis (SSc). METHODS: Original articles published between 2005 and 2016 that evaluated the use of ASCT in patients with SSc were reviewed with respect to the primary outcomes of overall and transplant related mortality (TRM) rates, and secondary outcomes of changes in modified Rodnan Skin Score (mRSS), forced vital capacity (FVC), progression/event free survival (P/EFS) and quality of life measures...
August 30, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28864138/comparison-of-different-rabbit-anti-thymocyte-globulin-formulations-in-allogeneic-stem-cell-transplantation-systematic-literature-review-and-network-meta-analysis
#11
Nico Gagelmann, Francis Ayuk, Christine Wolschke, Nicolaus Kröger
Since 2000, phase III randomized controlled trials (RCT) investigated the efficacy of rabbit anti-thymocyte globulins (ATG) in patients following allogeneic stem cell transplantation (allo-SCT). However, comparisons of different ATG formulations are lacking. Our aim was to synthesize all efficacy evidence, enabling a comparison of all available formulations of rabbit ATG in the allo-SCT setting. We performed a systematic literature review to identify all available phase III RCT evidence. We searched the Cochrane Library, MEDLINE, MEDLINE In-Process and the website www...
August 29, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28855310/chemokine-receptor-dependent-control-of-skin-tissue-resident-memory-t-cell-formation
#12
Ali Zaid, Jyh Liang Hor, Susan N Christo, Joanna R Groom, William R Heath, Laura K Mackay, Scott N Mueller
Infection or inflammation of the skin recruits effector CD8(+) T cells that enter the epidermis and form populations of long-lived tissue-resident memory T (TRM) cells. These skin TRM cells migrate within the constrained epidermal environment by extending multiple dynamic dendritic projections and squeezing between keratinocytes to survey the tissue for pathogens. In this study, we examined the signals required for this distinctive mode of T cell migration by inhibiting key cytoskeletal components and performing intravital two-photon microscopy to visualize TRM cell behavior...
August 30, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28855242/reduced-generation-of-lung-tissue-resident-memory-t-cells-during-infancy
#13
Kyra D Zens, Jun Kui Chen, Rebecca S Guyer, Felix L Wu, Filip Cvetkovski, Michelle Miron, Donna L Farber
Infants suffer disproportionately from respiratory infections and generate reduced vaccine responses compared with adults, although the underlying mechanisms remain unclear. In adult mice, lung-localized, tissue-resident memory T cells (TRMs) mediate optimal protection to respiratory pathogens, and we hypothesized that reduced protection in infancy could be due to impaired establishment of lung TRM. Using an infant mouse model, we demonstrate generation of lung-homing, virus-specific T effectors after influenza infection or live-attenuated vaccination, similar to adults...
August 30, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28845543/t-cell-replete-haploidentical-second-hematopoietic-stem-cell-transplantation-for-primary-graft-failure-in-pediatric-patients-with-hematologic-malignancies
#14
Kazuhiro Mochizuki, Hideki Sano, Mitsuko Akaihata, Shogo Kobayashi, Tomoko Waragai, Yoshihiro Ohara, Nobuhisa Takahashi, Masaki Ito, Kazuhiko Ikeda, Hitoshi Ohto, Atsushi Kikuta
GF is one of the fatal complications of allogeneic HSCT. To rescue patients with primary GF, a second HSCT should be conducted as soon as possible, but the optimal donor source and technique have yet to be established. In this study, we retrospectively analyzed six children with hematologic malignancies who received TCR-haploidentical second HSCT for primary GF. The median interval between the prior HSCT and the second HSCT was 37.5 days. All patients received fludarabine and ATG containing reduced-intensity re-conditioning before the second HSCT...
August 28, 2017: Pediatric Transplantation
https://www.readbyqxmd.com/read/28844945/matrix-metalloproteinase-9-in-monocytic-myeloid-derived-suppressor-cells-correlate-with-early-infections-and-clinical-outcomes-in-allogeneic-hematopoietic-stem-cell-transplantation
#15
Sung-Eun Lee, Ji-Young Lim, Tae Woo Kim, Young-Woo Jeon, Jae-Ho Yoon, Byung-Sik Cho, Ki-Seong Eom, Yoo-Jin Kim, Hee-Je Kim, Seok Lee, Seok-Goo Cho, Dong-Wook Kim, Jong Wook Lee, Woo-Sung Min, Dong-Mi Shin, Eun Young Choi, Chang-Ki Min
Recovery of myeloid-derived suppressor cells (MDSCs) and its relevance in clinical acute graft-versus-host disease (GVHD) and post-hematopoietic stem cell transplantation (HSCT) infections remain to be fully characterized. We examined the expansion of circulating monocytic (M-) MDSCs and granulocytic (G-) MDSCs at the time of engraftment in 130 patients undergoing allogeneic HSCT (allo-HSCT). The high M-MDSC group had a higher infection rate within 100 days, worse 1-year cumulative incidence of treatment-related mortality (TRM) and 2-year probability of event-free survival (EFS) than the G-MDSC group...
August 24, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28843110/cytomegalovirus-reactivation-in-lymphoma-and-myeloma-patients-undergoing-autologous-peripheral-blood-stem-cell-transplantation
#16
Radwan Massoud, Rita Assi, Elie Fares, Basel Haffar, Maya Charafeddine, Nabila Kreidieh, Rami Mahfouz, Souha S Kanj, Aline El Zakhem, Mohamed Kharfan-Dabaja, Ali Bazarbachi, Jean El Cheikh
BACKGROUND: Cytomegalovirus reactivation is often diagnosed in allogeneic hematopoietic cell transplant recipients and therefore could lead to CMV-related disease, involving many organs in these immunocompromised patients. In contrast, few studies investigated CMV reactivation and end-organ disease in patients undergoing Autologous Peripheral Blood Stem Cell Transplant (ASCT) since they are considered at low risk for both reactivation and disease. OBJECTIVES: The primary outcome of the analysis was to understand the difference in incidence of CMV reactivation between MM and Lymphoma patients...
August 18, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28842633/expression-and-role-of-vla-1-in-resident-memory-cd8-t-cell-responses-to-respiratory-mucosal-viral-vectored-immunization-against-tuberculosis
#17
Siamak Haddadi, Niroshan Thanthrige-Don, Sam Afkhami, Amandeep Khera, Mangalakumari Jeyanathan, Zhou Xing
Lung resident memory T cells (TRM) characterized by selective expression of mucosal integrins VLA-1 (α1β1) and CD103 (αEβ7) are generated following primary respiratory viral infections. Despite recent progress, the generation of lung TRM and the role of mucosal integrins following viral vector respiratory mucosal immunization still remains poorly understood. Here by using a replication-defective viral vector tuberculosis vaccine, we show that lung Ag-specific CD8 T cells express both VLA-1 and CD103 following respiratory mucosal immunization...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28829048/maintenance-of-pd-1-on-brain-resident-memory-cd8-t-cells-is-antigen-independent
#18
Shwetank, Hossam A Abdelsamed, Elizabeth L Frost, Heather M Schmitz, Taryn E Mockus, Ben A Youngblood, Aron E Lukacher
Infection of the central nervous system (CNS) by murine polyomavirus (MuPyV), a persistent natural mouse pathogen, establishes brain-resident memory CD8 T cells (bTRM) that uniformly and chronically express programmed cell death protein 1 (PD-1) irrespective of the expression of αE integrin CD103, a TRM cell marker. In contrast, memory antiviral CD8 T cells in the spleen are PD-1(-), despite viral loads being similar in both the brain and spleen during persistent infection. Repetitive antigen engagement is central to sustained PD-1 expression by T cells in chronic viral infections; however, recent evidence indicates that expression of inhibitory receptors, including PD-1, is part of the TRM differentiation program...
August 22, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28783666/dynamics-of-influenza-induced-lung-resident-memory-t-cells-underlie-waning-heterosubtypic-immunity
#19
Bram Slütter, Natalija Van Braeckel-Budimir, Georges Abboud, Steven M Varga, Shahram Salek-Ardakani, John T Harty
Lung-resident memory CD8 T cells (TRM) induced by influenza A virus (IAV) that are pivotal for providing subtype-transcending protection against IAV infection (heterosubtypic immunity) are not maintained long term, causing gradual loss of protection. The short-lived nature of lung TRM contrasts sharply with long-term maintenance of TRM induced by localized infections in the skin and in other tissues. We show that the decline in lung TRM is determined by an imbalance between apoptosis and lung recruitment and conversion to TRM of circulating memory cells...
January 6, 2017: Science Immunology
https://www.readbyqxmd.com/read/28783656/resident-memory-cd8-t-cells-in-the-upper-respiratory-tract-prevent-pulmonary-influenza-virus-infection
#20
Angela Pizzolla, Thi H O Nguyen, Jeffrey M Smith, Andrew G Brooks, Katherine Kedzieska, William R Heath, Patrick C Reading, Linda M Wakim
Nasal epithelial tissue of the upper respiratory tract is the first site of contact by inhaled pathogens such as influenza virus. We show that this region is key to limiting viral spread to the lower respiratory tract and associated disease pathology. Immunization of the upper respiratory tract leads to the formation of local tissue-resident memory CD8(+) T cells (Trm cells). Unlike Trm cells in the lung, these cells develop independently of local cognate antigen recognition and transforming growth factor-β signaling and persist with minimal decay, representing a long-term protective population...
June 2, 2017: Science Immunology
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