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https://www.readbyqxmd.com/read/29339446/ontogeny-of-human-mucosal-associated-invariant-t-cells-and-related-t-cell-subsets
#1
Ghada Ben Youssef, Marie Tourret, Marion Salou, Liana Ghazarian, Véronique Houdouin, Stanislas Mondot, Yvonne Mburu, Marion Lambert, Saba Azarnoush, Jean-Sébastien Diana, Anne-Laure Virlouvet, Michel Peuchmaur, Thomas Schmitz, Jean-Hugues Dalle, Olivier Lantz, Valérie Biran, Sophie Caillat-Zucman
Mucosal-associated invariant T (MAIT) cells are semi-invariant Vα7.2+ CD161highCD4- T cells that recognize microbial riboflavin precursor derivatives such as 5-OP-RU presented by MR1. Human MAIT cells are abundant in adult blood, but there are very few in cord blood. We longitudinally studied Vα7.2+ CD161high T cell and related subset levels in infancy and after cord blood transplantation. We show that Vα7.2+ and Vα7.2- CD161high T cells are generated early during gestation and likely share a common prenatal developmental program...
January 16, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29337646/stability-of-an-aluminum-salt-adjuvanted-protein-d-conjugated-pneumococcal-vaccine-after-exposure-to-subzero-temperatures
#2
Juliette Fortpied, Florence Wauters, Christelle Rochart, Philippe Hermand, Bernard Hoet, Nicolas Moniotte, Ivo Vojtek
Accidental exposure of a vaccine containing an aluminum-salt adjuvant to temperatures below 0°C in the cold chain can lead to freeze damage. Our study evaluated the potential for freeze damage in a licensed aluminum-salt-containing protein-D-conjugated pneumococcal vaccine (PHiD-CV; Synflorix, GSK) in conditions that included static storage, single subzero-temperature excursions, and simulated air-freight transportation. Several parameters were assessed including freezing at subzero temperatures, aluminum-salt-particle size, antigen integrity and immunogenicity in the mouse...
January 16, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29335408/escape-from-thymic-deletion-and-anti-leukemic-effects-of-t-cells-specific-for-hematopoietic-cell-restricted-antigen
#3
Ji-Min Ju, Min Ho Jung, Giri Nam, Woojin Kim, Sehwa Oh, Hyun Duk Kim, Joo Young Kim, Jun Chang, Sung Hak Lee, Gyeong Sin Park, Chang-Ki Min, Dong-Sup Lee, Moon Gyo Kim, Kyungho Choi, Eun Young Choi
Whether hematopoietic cell-restricted distribution of antigens affects the degree of thymic negative selection has not been investigated in detail. Here, we show that T cells specific for hematopoietic cell-restricted antigens (HRA) are not completely deleted in the thymus, using the mouse minor histocompatibility antigen H60, the expression of which is restricted to hematopoietic cells. As a result, low avidity T cells escape from thymic deletion. This incomplete thymic deletion occurs to the T cells developing de novo in the thymus of H60-positive recipients in H60-mismatched bone marrow transplantation (BMT)...
January 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29332492/safety-and-efficacy-of-photoselective-vaporization-of-the-prostate-using-the-180-w-greenlight-xps-laser-system-in-patients-taking-oral-anticoagulants
#4
Alper Eken, Bülent Soyupak
Objective To evaluate the safety and efficacy of the 180-W GreenLight XPS laser system for the treatment of benign prostatic hyperplasia in patients taking oral anticoagulants. Methods All consecutive patients admitted for lower urinary tract symptoms associated with benign prostatic hyperplasia from November 2012 to October 2016 and who underwent photoselective vaporization of the prostate with the 180-W GreenLight XPS laser were included in the study. The perioperative outcomes examined were the operating time, laser time, energy usage, and duration of postoperative catheterization...
January 1, 2018: Journal of International Medical Research
https://www.readbyqxmd.com/read/29331865/structure-based-assessment-of-protein-protein-interactions-and-accessibility-of-protein-ix-in-adenoviruses-with-implications-for-antigen-display
#5
Nathaniel L Matteson, Michael A Barry, Vijay S Reddy
The exterior minor protein IX of adenoviruses (AdVs) is a frequent target of attachment of antigens and the modified AdVs are being used as potent vaccine platforms. The organization of protein IX is disticntly different between human adenoviruses (HAdVs) and non-HAdVs. The analysis of solvent accessibility, based on the near atomic resolution structures, suggests that the C-terminal residues of IX are more accessible in non-HAdVs (e.g., bovine adenovirus) than in HAdVs. Although the C-terminal fusions of IX are displayed on the capsid surface, they could disrupt the formation of tetrameric coiled-coils (4-HLXB) in HAdVs due to steric hinderance, thereby potentially affecting the capsid stability...
January 11, 2018: Virology
https://www.readbyqxmd.com/read/29317287/in-vivo-response-of-the-human-epigenome-to-vitamin-d-a-proof-of-principle-study
#6
Carsten Carlberg, Sabine Seuter, Tarja Nurmi, Tomi-Pekka Tuomainen, Jyrki K Virtanen, Antonio Neme
In vitro cell culture studies showed that the hormonal form of vitamin D3, 1α,25-dihydroxyvitamin D3, significantly (p < 0.05) affects the human epigenome at thousands of genomic loci. Phase II of the VitDbol vitamin D intervention trial (NCT02063334) involved a proof-of-principle study of one individual, who was exposed three times every 28 days to an oral bolus (2,000 µg) of vitamin D3. Blood samples were taken directly before each supplementation as well as one and two days after, chromatin was isolated from peripheral blood mononuclear cells without any further in vitro culture and at all nine time points epigenome-wide chromatin accessibility was assessed by applying FAIRE-seq (formaldehyde-assisted isolation of regulatory elements sequencing)...
January 6, 2018: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29298756/adct-402-a-pbd-dimer-containing-antibody-drug-conjugate-targeting-cd19-expressing-malignancies
#7
Francesca Zammarchi, Simon Corbett, Lauren Adams, Peter C Tyrer, Konstantinos Kiakos, Narinder Janghra, Teresa Marafioti, Charles E Britten, Carin E G Havenith, Simon Chivers, Francois D'Hooge, David G Williams, Arnaud Tiberghien, Philip W Howard, John A Hartley, Patrick H van Berkel
Human CD19 antigen is a 95-kDa type I membrane glycoprotein in the immunoglobulin superfamily whose expression is limited to the various stages of B-cell development and differentiation and is maintained in the majority of B-cell malignancies, including leukemias and non-Hodgkin lymphomas of B-cell origin. Coupled with its differential and favourable expression profile, CD19 has rapid internalization kinetics and it is not shed into the circulation, making it an ideal target for the development of antibody-drug conjugates (ADCs) to treat B-cell malignancies...
January 3, 2018: Blood
https://www.readbyqxmd.com/read/29298671/hla-class-i-a-b-c-and-class-ii-dr-dq-polymorphism-in-the-mauritanian-population
#8
Cheikh Tijani Hamed, Ghlana Meiloud, Fatimetou Veten, Mouna Hadrami, Sidi M Ghaber, Ely C Boussaty, Norddine Habti, Ahmed Houmeida
BACKGROUND: HLA antigens have been widely studied for their role in transplantation biology, human diseases and population diversity. The aim of this study was to provide the first profile of HLA class I and class II alleles in the Mauritanian population. METHODS: HLA typing was carried in 93 healthy Mauritanian blood donors, using single specific primer amplification (PCR-SSP). RESULTS: Occurrences of the main HLA class I (-A, -B, -C) and class II (-DR, -DQ) antigens in the general population showed that out of the 17 HLA-A allele groups detected, five main HLA-A allele groups: A*02 (18...
January 3, 2018: BMC Medical Genetics
https://www.readbyqxmd.com/read/29284248/streptococcus-suis-a-re-emerging-pathogen-associated-with-occupational-exposure-to-pigs-or-pork-products-part-i-epidemiology
#9
Jacek Dutkiewicz, Jacek Sroka, Violetta Zając, Bernard Wasiński, Ewa Cisak, Anna Sawczyn, Anna Kloc, Angelina Wójcik-Fatla
<i>Streptococcus suis</i> (ex Elliot 1966, Kilpper-Bälz & Schleifer 1987) is a facultatively anaerobic Gram-positive ovoid or coccal bacterium surrounded by a polysaccharide capsule. Based on the antigenic diversity of the capsule, <i>S. suis</i> strains are classified serologically into 35 serotypes. <i>Streptococcus suis</i> is a commensal of pigs, commonly colonizing their tonsils and nasal cavities, mostly in weaning piglets between 4-10 weeks of age. This species occurs also in cattle and other mammals, in birds and in humans...
December 23, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/29281104/antigenic-characterization-of-a-novel-recombinant-gii-p16-gii-4-sydney-norovirus-strain-with-minor-sequence-variation-leading-to-antibody-escape
#10
Lisa C Lindesmith, Paul D Brewer-Jensen, Michael L Mallory, Kari Debbink, Excel W Swann, Jan Vinjé, Ralph S Baric
Background: Human noroviruses are the leading cause of acute gastroenteritis. Strains of the GII.4 genotype cause pandemic waves associated with viral evolution and subsequent antigenic drift and ligand binding modulation. In November 2015, a novel GII.4 Sydney recombinant variant (GII.P16-GII.4 Sydney) emerged and replaced GII.Pe-GII.4 Sydney as the predominant cause of acute gastroenteritis in the 2016-2017 season in the United States. Methods: Virus-like particles of GII...
December 22, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29275309/detection-of-local-recurrence-with-3-tesla-mri-after-radical-prostatectomy-a-useful-method-for-radiation-treatment-planning
#11
Daniel Buergy, Metin Sertdemir, Anja Weidner, Mohamed Shelan, Frank Lohr, Frederik Wenz, Stefan O Schoenberg, Ulrike I Attenberger
BACKGROUND/AIM: Salvage radiotherapy improves biochemical control in patients with recurrence of prostate cancer after prostatectomy. Radiotherapy target volumes of the prostatic fossa are based on empirical data and differ between different guidelines. Localization of recurrence with multiparametric magnetic resonance imaging (MRI) might be a feasible approach to localize recurrent lesions. PATIENTS AND METHODS: Twenty-one patients with biochemical recurrence after radical prostatectomy were included (median prostate-specific antigen (PSA) =0...
January 2018: In Vivo
https://www.readbyqxmd.com/read/29274017/trypanosoma-cruzi-serinecarboxipeptidase-is-a-sulfated-glycoprotein-and-a-minor-antigen-in-human-chagas-disease-infection
#12
Luciana L Soprano, Juliana E Parente, Malena Landoni, Alicia S Couto, Vilma G Duschak
In this work, the presence of sulfated N-glycans was studied in a high-mannose-type glycoprotein of Trypanosoma cruzi with serinecarboxipeptidase (TcSCP) activity. The immune cross-reactivity between purified SCP and Cruzipain (Cz) was evidenced using rabbit sera specific for both glycoproteins. Taking advantage that SCP co-purifies with Cz from Concanavalin-A affinity columns, the Cz-SCP mixture was desulfated, ascribing the cross-reactivity to the presence of sulfate groups in both molecules. Therefore, knowing that Cz is a sulfated glycoprotein, with antigenic sulfated epitopes (sulfotopes), SCP was excised from SDS-PAGE and the N-glycosydic chains were analyzed by UV-MALDI-TOF-MS, confirming the presence of short-sulfated high-mannose-type oligosaccharidic chains...
December 22, 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/29251415/specific-t-cell-responses-against-minor-histocompatibility-antigens-cannot-generally-be-explained-by-absence-of-their-allelic-counterparts-on-the-cell-surface
#13
Helena Maria Bijen, Chopie Hassan, Michel G D Kester, George M C Janssen, Pleun Hombrink, Arnoud H de Ru, Jan Wouter Drijfhout, Hugo D Meiring, Ad P de Jong, J H Frederik Falkenburg, Connie R Jimenez, Mirjam H M Heemskerk, Peter A van Veelen
Allogeneic stem cell transplantation has emerged as immunotherapy in the treatment of a variety of hematological malignancies. Its efficacy depends on induction of graft versus leukemia by donor lymphocytes. Both graft versus leukemia and graft versus host disease are induced by T-cells reactive against polymorphic peptides, called minor histocompatibility antigens (MiHA), which differ between patient and donor and are presented in the context of self-HLA. The allelic counterpart (AC) of the MiHA is generally considered to be absent at the cell surface, based on the absence of immune responses directed against the AC...
December 18, 2017: Proteomics
https://www.readbyqxmd.com/read/29230006/platinum-sensitivity-in-metastatic-prostate-cancer-does-histology-matter
#14
Michael S Humeniuk, Rajan T Gupta, Patrick Healy, Megan McNamara, Sundhar Ramalingam, Michael Harrison, Daniel George, Tian Zhang, Yuan Wu, Andrew J Armstrong
BACKGROUND: Platinum-based chemotherapy is effective in men with neuroendocrine prostate cancer (NEPC), but it is unclear whether histology (adenocarcinoma vs. non-adenocarcinoma NEPC variants) is predictive of platinum sensitivity. Given that NEPC exists as a spectrum, there may be men with adenocarcinoma who might benefit from platinum chemotherapy, particularly those men with DNA repair defects. METHODS: This was a retrospective study of all of the men seen at Duke University since 2005 who had metastatic castration-resistant prostate cancer (mCRPC) and were treated with a platinum agent...
December 11, 2017: Prostate Cancer and Prostatic Diseases
https://www.readbyqxmd.com/read/29212932/minor-capsid-protein-l2-polytope-induces-broad-protection-against-oncogenic-and-mucosal-human-papillomaviruses
#15
Somayeh Pouyanfard, Gloria Spagnoli, Lorenzo Bulli, Kathrin Balz, Fan Yang, Caroline Odenwald, Hanna Seitz, Filipe C Mariz, Angelo Bolchi, Simone Ottonello, Martin Müller
The amino terminus of the human papillomavirus minor capsid protein L2 contains a major cross-neutralization epitope which provides the basis for the development of a broadly protecting HPV vaccine. Wide range of protection against different HPV types would eliminate one of the major drawbacks of the commercial, L1 based prophylactic vaccines. Previously, we have reported that insertion of the L2 epitope into a scaffold composed of bacterial thioredoxin protein generates a potent antigen inducing comprehensive protection against different animal and human papillomaviruses...
December 6, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29212520/the-relationship-between-human-leukocyte-antigen-dp-dq-gene-polymorphisms-and-the-outcomes-of-hcv-infection-in-a-chinese-population
#16
Peng Huang, Haozhi Fan, Ting Tian, Peiwen Liao, Jun Li, Rongbin Yu, Xueshan Xia, Yue Feng, Jie Wang, Yuan Liu, Yun Zhang, Ming Yue
BACKGROUND: Recently, human leukocyte antigen (HLA) class-II gene polymorphisms have been reported to be related to Hepatitis C virus (HCV) infection and chronicity. The objective of this study was to explore the relationship of HLA-DP rs9277535 and HLA-DQ rs7453920 with the outcomes of HCV infection. METHODS: The rs9277535 and rs7453920 were genotyped in 370 subjects with chronic HCV infection, 194 subjects with spontaneous HCV clearance, and 973 subjects with non-HCV infection from the Chinese population using the ABI TaqMan allelic discrimination assay...
December 6, 2017: Virology Journal
https://www.readbyqxmd.com/read/29201383/an-autosomal-recessive-mutation-in-scl24a4-causing-enamel-hypoplasia-in-samoyed-and-its-relationship-to-breed-wide-genetic-diversity
#17
Niels C Pedersen, Bonnie Shope, Hongwei Liu
Background: Pure breeding of dogs has led to over 700 heritable disorders, of which almost 300 are Mendelian in nature. Seventy percent of the characterized mutations have an autosomal recessive mode of inheritance, indicative of positive selection during bouts of inbreeding primarily for new desired conformational traits. Samoyed suffer from several common complex genetic disorders, but up to this time only two X-linked and one autosomal dominant disorder have been identified. Previous studies based on pedigrees and SNP arrays have concluded that Samoyed breeders have done a good job in maintaining genetic diversity and avoiding excessive inbreeding...
2017: Canine Genetics and Epidemiology
https://www.readbyqxmd.com/read/29197680/increased-co-expression-of-pd-1-tigit-and-klrg-1-on-tumor-reactive-cd8-t-cells-during-relapse-after-allo-sct
#18
Tim J A Hutten, Wieger J Norde, Rob Woestenenk, Ruo Chen Wang, Frans Maas, Michel Kester, J H Frederik Falkenburg, Sofia Berglund, Leo Luznik, Joop H Jansen, Nicolaas Schaap, Harry Dolstra, Willemijn Hobo
Allogeneic stem cell transplantation (allo-SCT) can be a curative treatment for patients with a hematological malignancy due to allo-reactive T cell responses recognizing minor histocompatibility antigens (MiHA). Yet, tumor immune escape mechanisms can cause failure of T cell immunity, leading to relapse. Tumor cells display low expression of co-stimulatory molecules and can up-regulate co-inhibitory molecules that, upon ligation with their counter receptors on the tumor-reactive T cells, inhibit T cell functionality...
November 29, 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29194460/dynamical-system-modeling-to-simulate-donor-t-cell-response-to-whole-exome-sequencing-derived-recipient-peptides-understanding-randomness-in-alloreactivity-incidence-following-stem-cell-transplantation
#19
Vishal Koparde, Badar Abdul Razzaq, Tara Suntum, Roy Sabo, Allison Scalora, Myrna Serrano, Max Jameson-Lee, Charles Hall, David Kobulnicky, Nihar Sheth, Juliana Feltz, Daniel Contaifer, Dayanjan Wijesinghe, Jason Reed, Catherine Roberts, Rehan Qayyum, Gregory Buck, Michael Neale, Amir Toor
Quantitative relationship between the magnitude of variation in minor histocompatibility antigens (mHA) and graft versus host disease (GVHD) pathophysiology in stem cell transplant (SCT) donor-recipient pairs (DRP) is not established. In order to elucidate this relationship, whole exome sequencing (WES) was performed on 27 HLA matched related (MRD), & 50 unrelated donors (URD), to identify nonsynonymous single nucleotide polymorphisms (SNPs). An average 2,463 SNPs were identified in MRD, and 4,287 in URD DRP (p<0...
2017: PloS One
https://www.readbyqxmd.com/read/29187429/risk-factors-for-cytomegalovirus-infection-after-allogeneic-hematopoietic-cell-transplantation-in-malignancies-proposal-for-classification
#20
REVIEW
Magdalena Dziedzic, Iwona Sadowska-Krawczenko, Jan Styczynski
AIM: To identify and classify risk factors for cytomegalovirus (CMV) infection and disease in patients receiving allogeneic hematopoietic stem cell transplantation (allo-HSCT), treated mainly for acute leukemia. MATERIALS AND METHODS: A literature search was performed;eligible trials were clinical studies assessing the risk factors for CMV infection or disease in multivariate analysis. RESULTS: Early reactivation in the setting of allo-HSCT took place mainly in patients without CMV prophylaxis, while late reactivation mainly in those patients who had completed previous prophylaxis or were on anti-CMV strategy based on pre-emptive prophylaxis...
December 2017: Anticancer Research
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