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https://www.readbyqxmd.com/read/29787887/human-pegivirus-persistence-in-the-human-blood-virome-after-allogeneic-haematopoietic-stem-cell-transplantation
#1
Diem-Lan Vu, Samuel Cordey, Federico Simonetta, Francisco Brito, Mylène Docquier, Lara Turin, Christian van Delden, Elsa Boely, Carole Dantin, Amandine Pradier, Eddy Roosnek, Yves Chalandon, Evgeny M Zdobnov, Stavroula Masouridi-Levrat, Laurent Kaiser
OBJECTIVES: As commensal viruses are defined by the immunological tolerance afforded to them, any immunomodulation, such as is received during haematopoietic stem cell transplantation, may shift the demarcation between innocuous viral resident and disease-causing pathogen. METHODS: We analysed by deep-sequencing the plasma virome of 40 allogeneic haematopoietic stem cell transplant (allo-HSCT) patients 1 month post-transplantation. As human pegivirus (HPgV) was highly prevalent, we performed a one-year screening of 122 plasma samples by specific rRT-PCR assay...
May 19, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29779922/safety-tolerability-acceptability-and-immunogenicity-of-an-influenza-vaccine-delivered-to-human-skin-by-a-novel-high-density-microprojection-array-patch-nanopatch%C3%A2
#2
Germain J P Fernando, Julian Hickling, Cesar M Jayashi Flores, Paul Griffin, Christopher D Anderson, S Rachel Skinner, Cristyn Davies, Katey Witham, Melinda Pryor, Jesse Bodle, Steve Rockman, Ian H Frazer, Angus H Forster
BACKGROUND: Injection using needle and syringe (N&S) is the most widely used method for vaccination, but requires trained healthcare workers. Fear of needles, risk of needle-stick injury, and the need to reconstitute lyophilised vaccines, are also drawbacks. The Nanopatch (NP) is a microarray skin patch comprised of a high-density array of microprojections dry-coated with vaccine that is being developed to address these shortcomings. Here we report a randomised, partly-blinded, placebo-controlled trial that represents the first use in humans of the NP to deliver a vaccine...
May 17, 2018: Vaccine
https://www.readbyqxmd.com/read/29777573/quantiferon-cytomegalovirus-assay-a-potentially-useful-tool-in-the-evaluation-of-cmv-specific-cd8-t-cell-reconstitution-in-pediatric-hematopoietic-stem-cell-transplant-patients
#3
Bilio Paouri, Alexandra Soldatou, Eftihia Petrakou, Maria Theodosaki, Charalampos Tsentidis, Katerina Kaisari, Christina Oikonomopoulou, Minos Matsas, Eugenios Goussetis
Pediatric HSCT recipients are at high risk for CMV reactivation due to their immature immune system and therapy following transplantation. Reconstitution of CMV-specific T-cell immunity is associated with control and protection against CMV. The clinical utility of monitoring CMV-specific CMI to predict CMV viremia in pediatric HSCT patients using the Quantiferon-CMV (QIAGEN® ) test was investigated prospectively. Thirty-seven pediatric allogeneic HSCT recipients were enrolled from 3/2010-6/2012. CMV viremia was detected via weekly real-time PCR...
May 18, 2018: Pediatric Transplantation
https://www.readbyqxmd.com/read/29774202/loss-of-the-cyclin-dependent-kinase-inhibitor-1-in-the-context-of-brachyury-mediated-phenotypic-plasticity-drives-tumor-resistance-to-immune-attack
#4
Duane H Hamilton, Kristen K McCampbell, Claudia Palena
The acquisition of mesenchymal features by carcinoma cells is now recognized as a driver of metastasis and tumor resistance to a range of anticancer therapeutics, including chemotherapy, radiation, and certain small-molecule targeted therapies. With the recent successful implementation of immunotherapies for the treatment of various types of cancer, there is growing interest in understanding whether an immunological approach could be effective at eradicating carcinoma cells bearing mesenchymal features. Recent studies, however, demonstrated that carcinoma cells that have acquired mesenchymal features may also exhibit decreased susceptibility to lysis mediated by immune effector cells, including antigen-specific CD8+ T cells, innate natural killer (NK), and lymphokine-activated killer (LAK) cells...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29769208/infusion-of-alloanergized-donor-lymphocytes-after-cd34-selected-haploidentical-myeloablative-hematopoietic-stem-cell-transplantation
#5
Jeff K Davies, Lisa L Brennan, John Wingard, Christopher R Cogle, Neena Kapoor, Ami J Shah, Bimalangshu R Dey, Thomas R Spitzer, Marcos De Lima, Laurence Jn Cooper, Peter Thall, Richard E Champlin, Lee M Nadler, Eva C Guinan
PURPOSE: Allogeneic haematopoietic stem-cell transplantation (HSCT) is a curative treatment for many haematologic cancers. Use of haploidentical (mismatched) donors increases HSCT availability but is limited by severe graft-versus-host disease (GvHD) and delayed immune reconstitution. Alloanergization of donor T-cells is a simple approach to rebuild immunity whilst limiting GvHD after haploidentical HSCT but the optimal T-cell dose and impact on immune reconstitution remain unknown.  Experimental Design: We performed a multicentre Phase 1 trial of alloanergized donor lymphocyte infusion (aDLI) after CD34-selected myeloablative haploidentical HSCT...
May 16, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29762365/multiplex-real-time-pcr-detection-of-intestinal-protozoa-in-hiv-infected-children-in-malawi-enterocytozoon-bieneusi-is-common-and-associated-with-gastrointestinal-complaints-and-may-delay-bmi-nutritional-status-recovery
#6
Minke H W Huibers, Peter Moons, Nelson Maseko, Monfort B Gushu, Oluwadamilola H Iwajomo, Robert S Heyderman, Michael Boele van Hensbroek, Eric A Brienen, Lisette van Lieshout, Job C J Calis
BACKGROUND: Intestinal protozoa are common opportunistic infections in HIV patients. Longitudinal studies on either the clinical relevance, or the effect of immune reconstitution by anti-retroviral therapy on intestinal protozoan infections are children is lacking however. This study investigates prevalence and clinical relevance of intestinal protozoa in HIV-infected Malawian children prior to and during their first year of ART. METHODS: Stool samples collected at enrolment and during follow-up were tested for non-opportunistic (Giardia lamblia, Dientamoeba fragilis, Entamoeba histolytica) and opportunistic protozoa (Entroctytoon bieneusi, Encephalitozoon spp...
May 14, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29762363/immunogenicity-and-safety-of-primary-and-booster-vaccinations-of-a-fully-liquid-dtap-ipv-hb-prp-t-hexavalent-vaccine-in-healthy-infants-and-toddlers-in-germany-and-the-czech-republic
#7
Roman Prymula, Dorothee Kieninger, Emmanuel Feroldi, Emilia Jordanov, Siham B'Chir, Xavier DaCosta
BACKGROUND: To support a fully liquid, diphtheria (D)-tetanus (T)-acellular pertussis (aP)-inactivated poliovirus (IPV)-hepatitis B (HB)-Haemophilus influenzae b (PRP-T) vaccine in Europe using a 2, 3, 4 month primary series and a booster at 11 to 15 months of age. METHODS: Phase III, randomized, observer-blind studies in Germany and the Czech Republic. Participants who had not received HB vaccine were randomized to a 2, 3, 4 month primary series of DTaP-IPV-HB-PRP-T (Group 1; N=266) or a reconstituted DTaPHB-IPV//PRP-T comparator (Group 2; N=263) and a booster of the same vaccine...
May 14, 2018: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29762345/neutrophil-activation-and-enhanced-release-of-granule-products-in-hiv-tb-immune-reconstitution-inflammatory-syndrome-erratum
#8
(no author information available yet)
No abstract text is available yet for this article.
June 1, 2018: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/29760694/dissemination-of-orientia-tsutsugamushi-a-causative-agent-of-scrub-typhus-and-immunological-responses-in-the-humanized-draga-mouse
#9
Le Jiang, Erin K Morris, Rodrigo Aguilera-Olvera, Zhiwen Zhang, Teik-Chye Chan, Soumya Shashikumar, Chien-Chung Chao, Sofia A Casares, Wei-Mei Ching
Scrub typhus is caused by Orientia tsutsugamushi , an obligated intracellular bacterium that affects over one million people per year. Several mouse models have been used to study its pathogenesis, disease immunology, and for testing vaccine candidates. However, due to the intrinsic differences between the immune systems in mouse and human, these mouse models could not faithfully mimic the pathology and immunological responses developed by human patients, limiting their value in both basic and translational studies...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29760192/circadian-rhythms-influence-the-severity-of-sepsis-in-mice-via-a-tlr2-dependent-leukocyte-intrinsic-mechanism
#10
Erica L Heipertz, Jourdan Harper, Charlie A Lopez, Erol Fikrig, Michael E Hughes, Wendy E Walker
Circadian rhythms coordinate an organism's activities and biological processes to the optimal time in the 24-h daylight cycle. We previously demonstrated that male C57BL/6 mice develop sepsis more rapidly when the disease is induced in the nighttime versus the daytime. In this report, we elucidate the mechanism of this diurnal difference. Sepsis was induced via cecal ligation and puncture (CLP) at zeitgeber time (ZT)-19 (2 am) or ZT-7 (2 pm). Like the males used in our prior study, female C57BL/6 mice had a worse outcome when CLP was induced at ZT-19 versus ZT-7, and these effects persisted when we pooled the data from both sexes...
May 14, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29756505/novel-vector-construction-based-on-alternative-adenovirus-types-via-homologous-recombination
#11
Wenli Zhang, Jun Fu, Anja Ehrhardt
Adenoviral vector (AdV) is one of the most used vectors in gene therapy clinical trials. However the therapeutic effect of AdV is limited due to preexisting immunity to the currently used human adenovirus type 5 (Ad5) and pre-decided vector tropism. It is highly demanded to develop novel AdVs originated from other types than Ad5. Here, we describe a method for direct cloning of adenovirus utilizing linear-linear homologous recombination (LLHR), followed by rapid adenoviral genome modification via linear-circular homologous recombination (LCHR)...
May 14, 2018: Human Gene Therapy Methods
https://www.readbyqxmd.com/read/29755454/the-use-of-the-humanized-mouse-model-in-gene-therapy-and-immunotherapy-for-hiv-and-cancer
#12
REVIEW
Mayra A Carrillo, Anjie Zhen, Scott G Kitchen
HIV and cancer remain prevailing sources of morbidity and mortality worldwide. There are current efforts to discover novel therapeutic strategies for the treatment or cure of these diseases. Humanized mouse models provide the investigative tool to study the interaction between HIV or cancer and the human immune system in vivo . These humanized models consist of immunodeficient mice transplanted with human cells, tissues, or hematopoietic stem cells that result in reconstitution with a nearly full human immune system...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29753162/steroid-s-deleterious-effect-on-cmv-infection-rate-post-allo-sct-depends-on-pre-transplant-cmv-serostatus-of-donors-and-recipients
#13
María Suárez-Lledó, Núria Martínez-Cibrián, Gonzalo Gutiérrez-García, Veselka Dimova-Svetoslavova, Ma Angeles Marcos, Beatriz Martín-Antonio, Alejandra Martínez-Trillos, Neus Villamor, Laura Rosiñol, Carmen Martínez, Francesc Fernández-Avilés, Carolina García-Vidal, Álvaro Urbano-Ispizua, Montserrat Rovira
This study examined the impact of prednisone (PDN) on CMV infection after allogeneic stem cell transplantation (allo-SCT) according to donor (D) and recipient (R) CMV serostatus. Seventy-five patients underwent allo-SCT from June 2010 to July 2012. The risk of CMV infection according to D and R serostatus was defined as follows: high risk (HR) (D-/R+), intermediate risk (IR) (D+/R+ and D+/R-) and low risk (LR) (D-/R-). Forty-five patients (60%) developed CMV infection and forty-six patients (61%) received steroids (PDN ≥ 1 mg/kg/day) to treat acute Graft versus host disease (GvHD)...
May 9, 2018: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/29752550/aging-alters-the-immunological-response-to-ischemic-stroke
#14
Rodney M Ritzel, Yun-Ju Lai, Joshua D Crapser, Anita R Patel, Anna Schrecengost, Jeremy M Grenier, Nickolas S Mancini, Anthony Patrizz, Evan R Jellison, Diego Morales-Scheihing, Venugopal R Venna, Julia K Kofler, Fudong Liu, Rajkumar Verma, Louise D McCullough
The peripheral immune system plays a critical role in aging and in the response to brain injury. Emerging data suggest inflammatory responses are exacerbated in older animals following ischemic stroke; however, our understanding of these age-related changes is poor. In this work, we demonstrate marked differences in the composition of circulating and infiltrating leukocytes recruited to the ischemic brain of old male mice after stroke compared to young male mice. Blood neutrophilia and neutrophil invasion into the brain were increased in aged animals...
May 11, 2018: Acta Neuropathologica
https://www.readbyqxmd.com/read/29749873/fatal-cryptococcal-meningitis-in-an-aids-patient-complicated-with-immune-reconstitution-syndrome-refractory-to-prolonged-amphotericin-b-treatment
#15
Thilinie D Bandaranayake, Onyema E Ogbuagu, Amit Mahajan, Alexander O Vortmeyer, Merceditas S Villanueva
Cryptococcus neoformans is a ubiquitous encapsulated environmental yeast that can cause severe central nervous system disease, primarily in immune compromised hosts. In patients with AIDS, the spectrum of cryptococcal central nervous system disease includes meningitis, cystic lesions, and mass-like cryptococcomas. We report a fatal case of meningitis and cerebritis caused by C. neoformans in an AIDS patient refractory to multiple courses of liposomal amphotericin B despite immune recovery with antiretroviral therapy...
January 1, 2018: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29747074/high-dose-zinc-oral-supplementation-after-stem-cell-transplantation-causes-an-increase-of-trecs-and-cd4-na%C3%A3-ve-lymphocytes-and-prevents-ttv-reactivation
#16
Lorenzo Iovino, Francesco Mazziotta, Giovanni Carulli, Francesca Guerrini, Riccardo Morganti, Valentina Mazzotti, Fabrizio Maggi, Lisa Macera, Enrico Orciuolo, Gabriele Buda, Edoardo Benedetti, Francesco Caracciolo, Sara Galimberti, Mauro Pistello, Mario Petrini
INTRODUCTION: Zinc plays an important role in thymic function and immune homeostasis. We performed a prospective clinical trial using a high-dose zinc oral supplementation to improve the immune reconstitution after hematopoietic stem cell transplant (HSCT). PATIENTS AND METHODS: We enrolled 18 patients undergoing autologous HSCT for multiple myeloma. Nine patients were randomized to receive only a standard antimicrobial prophylaxis; whereas, nine patients received in addition 150 mg/day of zinc from day +5 to day +100 after transplant...
May 2, 2018: Leukemia Research
https://www.readbyqxmd.com/read/29741774/management-of-post-transplant-lymphoproliferative-disorders
#17
REVIEW
Christin B DeStefano, Sanjal H Desai, Aarthi G Shenoy, Joseph P Catlett
The post-transplant lymphoproliferative disorders (PTLDs) are a heterogeneous group of neoplasms that are one of the most serious complications of bone marrow and solid organ transplants. Because these disorders are rare, there are no randomized trials from which to derive optimal treatment. Management can be challenging and must balance the goal of PTLD eradication with the risks of graft rejection, graft-versus-host disease, further delays in immune reconstitution and life-threatening infections, among others...
May 9, 2018: British Journal of Haematology
https://www.readbyqxmd.com/read/29740426/multipotent-adult-progenitor-cells-suppress-t-cell-activation-in-in-vivo-models-of-homeostatic-proliferation-in-a-prostaglandin-e2-dependent-manner
#18
Fiona Carty, Jennifer M Corbett, João Paulo M C M Cunha, James L Reading, Timothy I M Tree, Anthony E Ting, Samantha R Stubblefield, Karen English
Lymphodepletion strategies are used in the setting of transplantation (including bone marrow, hematopoietic cell, and solid organ) to create space or to prevent allograft rejection and graft versus host disease. Following lymphodepletion, there is an excess of IL-7 available, and T cells that escape depletion respond to this cytokine undergoing accelerated proliferation. Moreover, this environment promotes the skew of T cells to a Th1 pro-inflammatory phenotype. Existing immunosuppressive regimens fail to control this homeostatic proliferative (HP) response, and thus the development of strategies to successfully control HP while sparing T cell reconstitution (providing a functioning immune system) represents a significant unmet need in patients requiring lymphodepletion...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29740124/a-targeted-boost-and-sort-immunization-strategy-using-escherichia-coli-bama-identifies-rare-growth-inhibitory-antibodies
#19
Rajesh Vij, Zhonghua Lin, Nancy Chiang, Jean-Michel Vernes, Kelly M Storek, Summer Park, Joyce Chan, Y Gloria Meng, Laetitia Comps-Agrar, Peng Luan, Sophia Lee, Kellen Schneider, Jack Bevers, Inna Zilberleyb, Christine Tam, Christopher M Koth, Min Xu, Avinash Gill, Marcy R Auerbach, Peter A Smith, Steven T Rutherford, Gerald Nakamura, Dhaya Seshasayee, Jian Payandeh, James T Koerber
Outer membrane proteins (OMPs) in Gram-negative bacteria are essential for a number of cellular functions including nutrient transport and drug efflux. Escherichia coli BamA is an essential component of the OMP β-barrel assembly machinery and a potential novel antibacterial target that has been proposed to undergo large (~15 Å) conformational changes. Here, we explored methods to isolate anti-BamA monoclonal antibodies (mAbs) that might alter the function of this OMP and ultimately lead to bacterial growth inhibition...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29735820/-fusarium-the-versatile-pathogen
#20
REVIEW
Ananya Tupaki-Sreepurna, Anupma Jyoti Kindo
Fusarium is an emerging human opportunistic pathogen of growing importance, especially among immunosuppressed haematology patients due to an increased incidence of disseminated infections over the past two decades. This trend is expected only to continue due to the advances in medical and surgical technologies that will prolong the lives of the severely ill, making these patients susceptible to rare opportunistic infections. Production of mycotoxins, enzymes such as proteases, angio-invasive property and an intrinsically resistant nature, makes this genus very difficult to treat...
January 2018: Indian Journal of Medical Microbiology
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