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https://www.readbyqxmd.com/read/28424687/cd103-cd8-t-cells-in-the-toxoplasma-infected-brain-exhibit-a-tissue-resident-memory-transcriptional-profile
#1
Tyler A Landrith, Suhas Sureshchandra, Andrea Rivera, Jessica C Jang, Maham Rais, Meera G Nair, Ilhem Messaoudi, Emma H Wilson
During chronic infection, memory T cells acquire a unique phenotype and become dependent on different survival signals than those needed for memory T cells generated during an acute infection. The distinction between the role of effector and memory T cells in an environment of persistent antigen remains unclear. Here, in the context of chronic Toxoplasma gondii infection, we demonstrate that a population of CD8 T cells exhibiting a tissue-resident memory (TRM) phenotype accumulates within the brain. We show that this population is distributed throughout the brain in both parenchymal and extraparenchymal spaces...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28418771/persistence-in-temporary-lung-niches-a-survival-strategy-of-lung-resident-memory-cd8-t-cells
#2
Shiki Takamura
Respiratory virus infections, such as those mediated by influenza virus, parainfluenza virus, respiratory syncytial virus (RSV), severe acute respiratory syndrome coronavirus (SARS-CoV), rhinovirus, and adenovirus, are responsible for substantial morbidity and mortality, especially in children and older adults. Furthermore, the potential emergence of highly pathogenic strains of influenza virus poses a significant public health threat. Thus, the development of vaccines capable of eliciting long-lasting protective immunity to those pathogens is a major public health priority...
April 18, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28410427/tcr-stimulation-strength-is-inversely-associated-with-establishment-of-functional-brain-resident-memory-cd8-t-cells-during-persistent-viral-infection
#3
Saumya Maru, Ge Jin, Todd D Schell, Aron E Lukacher
Establishing functional tissue-resident memory (TRM) cells at sites of infection is a newfound objective of T cell vaccine design. To directly assess the impact of antigen stimulation strength on memory CD8 T cell formation and function during a persistent viral infection, we created a library of mouse polyomavirus (MuPyV) variants with substitutions in a subdominant CD8 T cell epitope that exhibit a broad range of efficiency in stimulating TCR transgenic CD8 T cells. By altering a subdominant epitope in a nonstructural viral protein and monitoring memory differentiation of donor monoclonal CD8 T cells in immunocompetent mice, we circumvented potentially confounding changes in viral infection levels, virus-associated inflammation, size of the immunodominant virus-specific CD8 T cell response, and shifts in TCR affinity that may accompany temporal recruitment of endogenous polyclonal cells...
April 14, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28408602/the-preprophase-band-of-microtubules-controls-the-robustness-of-division-orientation-in-plants
#4
Estelle Schaefer, Katia Belcram, Magalie Uyttewaal, Yann Duroc, Magali Goussot, David Legland, Elise Laruelle, Marie-Ludivine de Tauzia-Moreau, Martine Pastuglia, David Bouchez
Controlling cell division plane orientation is essential for morphogenesis in multicellular organisms. In plant cells, the future cortical division plane is marked before mitotic entry by the preprophase band (PPB). Here, we characterized an Arabidopsis trm (TON1 Recruiting Motif) mutant that impairs PPB formation but does not affect interphase microtubules. Unexpectedly, PPB disruption neither abolished the capacity of root cells to define a cortical division zone nor induced aberrant cell division patterns but rather caused a loss of precision in cell division orientation...
April 14, 2017: Science
https://www.readbyqxmd.com/read/28405016/influenza-induced-lung-trm-not-all-memories-last-forever
#5
REVIEW
Natalija Van Braeckel-Budimir, John T Harty
In the light of new findings that lung tissue resident memory CD8+ T cells (Trm) represent major mediators of heterosubtypic immunity against influenza virus, it is of utmost importance to understand the basic biological mechanisms behind induction, formation and maintenance of this cell population. Addressing these important knowledge gaps will potentially inform development of superior, broadly-protective influenza vaccines and new immunization strategies.Immunology and Cell Biology accepted article preview online, 13 April 2017...
April 13, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28396164/dose-escalation-of-total-marrow-irradiation-in-high-risk-patients-undergoing-allogeneic-hematopoietic-stem-cell-transplantation
#6
Susanta Hui, Claudio Brunstein, Yutaka Takahashi, Todd DeFor, Shernan G Holtan, Veronika Bachanova, Christopher Wilke, Darren Zuro, Celalettin Ustun, Daniel Weisdorf, Kathryn Dusenbery, Michael R Verneris
Patients with refractory leukemia or minimal residual disease (MRD) at transplant have increased risk of relapse. Augmentation of irradiation, especially to sites of disease (i.e., bone marrow) is one potential strategy to overcome this risk. We studied the feasibility of radiation dose escalation in high risk patients using total marrow irradiation (TMI) in a phase I dose-escalation trial. Four pediatric and 8 adult patients received conditioning with cyclophosphamide and fludarabine in conjunction with image-guided radiation to the bone marrow at 15 Gy and 18 Gy (in 3 Gy/fractions), while maintaining the total body irradiation (TBI) dose to the vital organs (lungs, hearts, eyes, liver, kidneys) at <13...
April 7, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28389253/role-of-genetic-polymorphism-of-aldh2-in-hematopoietic-stem-cell-transplantation
#7
Tomotaka Ugai, Yoshinobu Kanda, Yasuo Morishima, Keitaro Matsuo
Aldehyde dehydrogenase 2 (ALDH2) is involved in critically important biological processes, such as the metabolism of aldehydes and aldehyde-induced genotoxicity in hematopoietic stem cells. Given its role in these biological processes, we hypothesized that a functional ALDH2 polymorphism could affect transplant outcome after hematopoietic stem cell transplantation. Here, we analyzed the Japanese national registry data for 409 patients who underwent allogeneic bone marrow transplantation (BMT) from an HLA-matched unrelated donor...
April 4, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28383130/clinical-characteristics-and-prognostic-factors-in-multiple-myeloma-patients-with-light-chain-deposition-disease
#8
Meera Mohan, Amy Buros, Pankaj Mathur, Neriman Gokden, Manisha Singh, Sandra Susanibar, Jorge Jo Kamimoto, Shadiqul Hoque, Muthukumar Radhakrishnan, Aasiya Matin, Cynthia Davis, Monica Grazziutti, Sharmilan Thanendrarajan, Frits van Rhee, Maurizio Zangari, Faith Davies, Gareth Morgan, Joshua Epstein, Bart Barlogie, Carolina Schinke
Light chain deposition disease (LCDD) is characterized by monotypic immunoglobulin depositions which will eventually lead to loss of organ function if left untreated. While the kidney is almost always affected, the presence and degree of LCDD in other organs vary. Ten to 30% of LCDD patients have underlying Multiple Myeloma (MM), yet outcome and prognostic markers in this particular patient group are still lacking. Here, we analyzed 69 patients with MM and biopsy proven LCDD and report on renal and extra-renal involvement and its impact on prognosis as well as renal response depending on hematologic response...
April 6, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28380351/local-inflammatory-cues-regulate-differentiation-and-persistence-of-cd8-tissue-resident-memory-t-cells
#9
Tessa Bergsbaken, Michael J Bevan, Pamela J Fink
Many pathogens initiate infection at mucosal surfaces, and tissue-resident memory T (Trm) cells play an important role in protective immunity, yet the tissue-specific signals that regulate Trm differentiation are poorly defined. During Yersinia infection, CD8(+) T cell recruitment to areas of inflammation within the intestine is required for differentiation of the CD103(-)CD69(+) Trm subset. Intestinal proinflammatory microenvironments have elevated interferon (IFN)-β and interleukin-12 (IL-12), which regulated Trm markers, including CD103...
April 4, 2017: Cell Reports
https://www.readbyqxmd.com/read/28380315/myeloablative-versus-reduced-intensity-hematopoietic-cell-transplantation-for-acute-myeloid-leukemia-and-myelodysplastic-syndromes
#10
Bart L Scott, Marcelo C Pasquini, Brent R Logan, Juan Wu, Steven M Devine, David L Porter, Richard T Maziarz, Erica D Warlick, Hugo F Fernandez, Edwin P Alyea, Mehdi Hamadani, Asad Bashey, Sergio Giralt, Nancy L Geller, Eric Leifer, Jennifer Le-Rademacher, Adam M Mendizabal, Mary M Horowitz, H Joachim Deeg, Mitchell E Horwitz
Purpose The optimal regimen intensity before allogeneic hematopoietic cell transplantation (HCT) is unknown. We hypothesized that lower treatment-related mortality (TRM) with reduced-intensity conditioning (RIC) would result in improved overall survival (OS) compared with myeloablative conditioning (MAC). To test this hypothesis, we performed a phase III randomized trial comparing MAC with RIC in patients with acute myeloid leukemia or myelodysplastic syndromes. Patients and Methods Patients age 18 to 65 years with HCT comorbidity index ≤ 4 and < 5% marrow myeloblasts pre-HCT were randomly assigned to receive MAC (n = 135) or RIC (n = 137) followed by HCT from HLA-matched related or unrelated donors...
April 10, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28361896/tissue-resident-memory-t-cells-live-off-the-fat-of-the-land
#11
J Michael Stolley, David Masopust
The consumption of exogenous free fatty acids by tissue-resident memory T (Trm) cells is critical for their long-term survival and antiviral function, and appears to be a conserved feature of Trm cells in both mouse and man, a recent paper published in Nature demonstrates.
March 31, 2017: Cell Research
https://www.readbyqxmd.com/read/28359910/cost-effectiveness-of-defibrotide-in-the-prophylaxis-of-veno-occlusive-disease-after-pediatric-allogeneic-stem-cell-transplantation
#12
Herbert Pichler, Karolina Horner, Gernot Engstler, Ulrike Poetschger, Evgenia Glogova, Susanne Karlhuber, Manuel Martin, Werner Eibler, Volker Witt, Wolfgang Holter, Susanne Matthes-Martin
Veno-occlusive disease (VOD) remains a serious complication after allogeneic hematopoietic stem cell transplantation (HSCT). Prophylactic use of defibrotide (DF) might further reduce VOD rates but has no impact on the incidence of severe VOD or VOD-associated mortality. We investigated the cost-effectiveness of prophylactic DF according to the BCSH/BSBMT guidelines in 348 children who underwent transplantation between 2001 and 2013 in our hospital, 138 of whom were at risk for VOD. The VOD incidence was 7.4% for the total cohort...
March 27, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28345628/tissue-resident-memory-t-cells-in-the-human-conjunctiva-and-immune-signatures-in-human-dry-eye-disease
#13
Tanima Bose, Ryan Lee, Aihua Hou, Louis Tong, K George Chandy
Non-recirculating resident memory (TRM) and recirculating T cells mount vigorous immune responses to both self and foreign antigens in barrier tissues like the skin, lung and gastrointestinal tract. Using impression cytology followed by flow cytometry we identified two TRM subsets and four recirculating T-subsets in the healthy human ocular surface. In dry eye disease, principal component analysis (PCA) revealed two clusters of patients with distinct T-cell signatures. Increased conjunctival central memory and naïve T cells characterized Cluster-1 patients, and increased CD8(+) TRMs and CD4(+) recirculating memory T cells characterized Cluster-2 patients...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28342639/sendai-virus-mucosal-vaccination-establishes-lung-resident-memory-cd8%C3%A2-t-cell-immunity-and-boosts-bcg-primed-protection-against-tb-in-mice
#14
Zhidong Hu, Ka-Wing Wong, Hui-Min Zhao, Han-Li Wen, Ping Ji, Hui Ma, Kang Wu, Shui-Hua Lu, Feng Li, Zhong-Ming Li, Tsugumine Shu, Jian-Qing Xu, Douglas B Lowrie, Xiao-Yong Fan
Accumulating evidence has shown the protective role of CD8(+) T cells in vaccine-induced immunity against Mycobacterium tuberculosis (Mtb) despite controversy over their role in natural immunity. However, the current vaccine BCG is unable to induce sufficient CD8(+) T cell responses, especially in the lung. Sendai virus, a respiratory RNA virus, is here engineered firstly as a novel recombinant anti-TB vaccine (SeV85AB) that encodes Mtb immuno-dominant antigens, Ag85A and Ag85B. A single mucosal vaccination elicited potent antigen-specific T cell responses and a degree of protection against Mtb challenge similar to the effect of BCG in mice...
March 22, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28331127/the-impact-of-a-humanized-ccr4-antibody-mogamulizumab-on-patients-with-aggressive-type-adult-t-cell-leukemia-lymphoma-treated-with-allogeneic-hematopoietic-stem-cell-transplantation
#15
Noriaki Kawano, Takuro Kuriyama, Shuro Yoshida, Sayaka Kawano, Yoshihisa Yamano, Kousuke Marutsuka, Seiichirou Minato, Kiyoshi Yamashita, Hidenobu Ochiai, Kazuya Shimoda, Fumihiko Ishikawa, Ikuo Kikuchi
Although a humanized CCR4 antibody (mogamulizumab) was reported to be effective for refractory adult T-cell leukemia-lymphoma (ATL), several reports regarding the use of mogamulizumab before allo-hematopoietic stem cell transplantation (HSCT) strongly indicated a high incidence of severe acute graft-versus-host-disease (GVHD) and treatment-related mortality (TRM). We retrospectively analyzed nine aggressive-type ATL patients who underwent allo-HSCT at a single institution in Miyazaki from 2006.1.1 to 2015.7...
2017: Journal of Clinical and Experimental Hematopathology: JCEH
https://www.readbyqxmd.com/read/28324640/cytogenetics-and-comorbidity-predict-outcomes-in-older-myelodysplastic-syndrome-patients-after-allogenic-stem-cell-transplantation-using-reduced-intensity-conditioning
#16
Orhan Kemal Yucel, Rima M Saliba, Gabriella Rondon, Sairah Ahmed, Amin Alousi, Qaiser Bashir, Stefan O Ciurea, Uday Popat, Isa Khouri, David Marin, Katy Rezvani, Partow Kebriaei, Elizabeth J Shpall, Richard E Champlin, Betül Oran
BACKGROUND: Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is the only treatment with a curative potential for myelodysplastic syndrome (MDS) patients. Allo-HSCT has substantial risks, particularly in the elderly, and its role for older MDS patients has yet to be defined. METHODS: We analyzed 88 MDS patients aged ≥ 60 years with allo-HSCT after reduced intensity conditioning regimens over the last decade. The study cohort had high risk features; 47 of 88 (53...
March 21, 2017: Cancer
https://www.readbyqxmd.com/read/28323259/maintaining-trm-cells
#17
Zoltan Fehervari
No abstract text is available yet for this article.
March 22, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28288952/outcomes-after-umbilical-cord-blood-transplantation-for-myelodysplastic-syndromes
#18
Aaron T Gerds, Kwang Woo Ahn, Zhen-Huan Hu, Hisham Abdel-Azim, Gorgun Akpek, Mahmoud Aljurf, Karen K Ballen, Amer Beitinjaneh, Ulrike Bacher, Jean-Yves Cahn, Saurabh Chhabra, Corey Cutler, Andrew Daly, Zachariah DeFilipp, Robert Peter Gale, Usama Gergis, Michael R Grunwald, Gregory A Hale, Betty Ky Hamilton, Madan Jagasia, Rammurti T Kamble, Tamila Kindwall-Keller, Taiga Nishihori, Richard F Olsson, Muthalagu Ramanathan, Ayman A Saad, Melhem Solh, Celalettin Ustun, David Valcárcel, Erica Warlick, Baldeep M Wirk, Matt Kalaycio, Edwin Alyea, Uday Popat, Ronald Sobecks, Wael Saber
For patients with hematologic malignancies undergoing allogeneic hematopoietic cell transplantation, umbilical cord blood transplantation (UCBT) has become an acceptable alternative donor source in the absence of a matched sibling or unrelated donor. To date, however, there have been few published series dedicated solely to describing the outcomes of adult patients with myelodysplastic syndrome (MDS) who have undergone UCBT. Between 2004 and 2013, 176 adults with MDS underwent UCBT as reported to the Center for International Blood and Marrow Transplant Research...
March 10, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28279825/optimal-practices-in-unrelated-donor-cord-blood-transplantation-for-hematologic-malignancies
#19
REVIEW
Juliet N Barker, Joanne Kurtzberg, Karen Ballen, Michael Boo, Claudio Brunstein, Corey Cutler, Mitchell Horwitz, Filippo Milano, Amanda Olson, Stephen Spellman, John E Wagner, Colleen Delaney, Elizabeth Shpall
Unrelated donor cord blood transplantation (CBT) results in disease-free survival comparable to that of unrelated adult donor transplantation in patients with hematologic malignancies. Extension of allograft access to racial and ethnic minorities, rapid graft availability, flexibility of transplantation date, and low risks of disabling chronic graft-versus-host disease (GVHD) and relapse are significant advantages of CBT, and multiple series have reported a low risk of late transplantation-related mortality (TRM) post-transplantation...
March 6, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/28275186/cpg-in-combination-with-an-inhibitor-of-notch-signaling-suppresses-fi-rsv-enhanced-airway-hyperresponsiveness-and-inflammation-through-inhibiting-th17-memory-responses-and-promoting-tissue-resident-memory-cells-in-lungs
#20
Lei Zhang, Hongyong Li, Yan Hai, Wei Yin, Wenjian Li, Boyang Zheng, Xiaomin Du, Na Li, Zhengzheng Zhang, Yuqing Deng, Ruihong Zeng, Lin Wei
Respiratory syncytial virus (RSV) is the leading cause of childhood hospitalizations. The formalin-inactivated RSV (FI-RSV) vaccine enhanced respiratory disease (ERD) has been an obstacle to the development of a safe and effective killed RSV vaccine. Agonists of Toll-like receptor (TLR) have been shown to regulate immune responses induced by FI-RSV. Notch signaling plays critical roles during the differentiation and effector function phases of innate and adaptive immune responses. Cross-talk between TLR and Notch signaling pathways results in fine tuning of TLR-triggered innate inflammatory responses...
March 8, 2017: Journal of Virology
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