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Total 243 results found since Jan 2013.

Development and optimization of a hybridization technique to type the classical class I and class II B genes of the chicken MHC
We describe a typing protocol for classical chicken class I (BF) and class II B (BLB) genes based on a hybridization method called reference strand-mediated conformational analysis (RSCA). We optimize the various steps, validate the analysis using well-characterized chicken MHC haplotypes, apply the system to type some experimental lines and discover a new chicken class I allele. This work establishes a basis for typing the MHC genes of chickens worldwide and provides an opportunity to correlate with microsatellite and with single nucleotide polymorphism (SNP) typing for approaches involving imputation.
Source: Immunogenetics - November 24, 2019 Category: Genetics & Stem Cells Source Type: research

Immunogenicity Evaluation of Recombinant Edible Vaccine Candidate Containing HER2-MUC1 against Breast Cancer.
In this study, Her2, MUC1, and a novel fusion structure were expressed in the seeds and hairy roots of transgenic plants appropriately. The mice groups were immunized either by feeding of transgenic seeds or hairy roots. All immunized groups showed a considerable rise in anti-glycoprotein serum IgG and IgA, and IFNɣ cytokine. However, the animals received chimeric protein showed significant higher immune responses in comparison to ones received one of these immunogen. The results indicated that the oral immunization of an animal model with transgenic plants could effectively elicit immune responses against two major tumo...
Source: Iranian Journal of Allergy, Asthma and Immunology - October 22, 2019 Category: Allergy & Immunology Authors: Mehrab Mohseni M, Amani J, Fasihi Ramandi M, Mahjoubi F, Jafaria M, Salmanian AH Tags: Iran J Allergy Asthma Immunol Source Type: research

The future of vaccine development.
Abstract Vaccines are one of the most successful public health interventions in our history resulting in eradication of small pox, near eradication of polio and major reductions in case number and global morbidity and mortality for numerous diseases (Centers for Disease C, 1999) [1]. However, vaccine development has been less successful against complex infectious diseases, where pathogen variability and/or immune evasion mechanisms have combined to pose major obstacles, and have been unsuccessful against non-communicable diseases, including cancer, autoimmunity, allergy, neurodegenerative and metabolic diseases (K...
Source: Vaccine - August 19, 2019 Category: Allergy & Immunology Authors: Koff WC, Schenkelberg T Tags: Vaccine Source Type: research

Leukocyte Heparanase: A Double-Edged Sword in Tumor Progression
Conclusions This review describes how leukocyte-heparanase can be a double-edged sword in tumor progression; it can enhance tumor immune surveillance and tumor cell clearance, but also promote tumor survival and growth. We also discuss the potential of using heparanase in leukocyte therapies against tumors, and the effects of heparanase inhibitors on tumor progression and immunity. We are just beginning to understand the influence of heparanase on a pro/anti-tumor immune response, and there are still many questions to answer. How do the pro/anti-tumorigenic effects of heparanase differ across different cancer types? Does...
Source: Frontiers in Oncology - April 29, 2019 Category: Cancer & Oncology Source Type: research

Functional Antibody Responses Following Allogeneic Stem Cell Transplantation for TP53 Mutant pre-B-ALL in a Patient With X-Linked Agammaglobulinemia
Discussion This case demonstrates successful cure of pre-B-ALL complicating XLA by alloSCT with restoration of B-cell development and functional antibody response. We are aware of only one previous case of pre-B-ALL in an XLA patient (21), which suggests that human BTK deficiency in itself does not predispose to pre-B-ALL. However, there are data to suggest that BTK may act as a tumor suppressor, and BTK deficiency may predispose to tumor development following a “second hit.” Mice with a genetic deficiency in Slp65, a gene encoding an adaptor protein that functions together with BTK, have a block in proge...
Source: Frontiers in Immunology - April 25, 2019 Category: Allergy & Immunology Source Type: research

A Gene Therapy Breakthrough Could Offer a Treatment for the Rare and Deadly ‘Bubble Boy’ Disease
Researchers used an experimental gene therapy to develop a possible treatment for a rare and deadly immune disorder known as “bubble boy” disease, the National Institutes of Health (NIH) announced Wednesday. Because of a gene mutation, babies who are born with X-linked severe combined immunodeficiency (X-SCID) do not develop immune cells properly, leaving them highly susceptible to infections. The condition, which strikes up to one in 50,000 newborns, primarily affects boys and requires extreme measures to prevent infection. In one famous case, a boy with SCID, David Vetter, lived in a sterile plastic “bu...
Source: TIME: Health - April 18, 2019 Category: Consumer Health News Authors: Jamie Ducharme Tags: Uncategorized Research Source Type: news

From “Serum Sickness” to “Xenosialitis”: Past, Present, and Future Significance of the Non-human Sialic Acid Neu5Gc
Conclusions and Perspectives In this review, we have discussed important milestones from the early description of “Serum-sickness” as being due to antibodies directed against Neu5Gc epitopes all the way to the present-day therapeutic implications of these antibodies in cancer therapy. Some of these milestones have been represented in a concise timeline (Figure 6). While the “Xenosialitis” hypothesis is well-supported in the human-like mouse models, it has yet to be conclusively proven in humans. It remains to be seen if “Xenosialitis” plays a role in other uniquely-human dis...
Source: Frontiers in Immunology - April 16, 2019 Category: Allergy & Immunology Source Type: research

Editorial: Shaping of Human Immune System and Metabolic Processes by Viruses and Microorganisms
Conclusions In conclusion, articles in this Research Topic made a very significant contribution to our understanding of the role played by environmental factors, dysbiotic conditions, and infections in triggering diseases. Since this is a rapidly expanding area of research, many other factors contributing to the onset of these diseases are not covered here. We are confident, however, that further studies will expand the list as well as bring a better understanding of mechanisms involved in the onset of autoimmune and autoinflammatory diseases. Author Contributions All authors listed have made a substantial, direct and i...
Source: Frontiers in Microbiology - April 16, 2019 Category: Microbiology Source Type: research

Surface (S) Layer Proteins of Lactobacillus acidophilus Block Virus Infection via DC-SIGN Interaction
We describe the unexpected binding of S-layer to cells devoid of DC-SIGN but also confirm that the presence of DC-SIGN was essential for S-layer’s antiviral activity. S-layer protein exerted its antiviral effect with different kinetics than mannan, a known viral inhibitor that also acts on DC-SIGN (Yu et al., 2017). Together our results suggest that inhibition of viral entry by S-layer occurs via a novel S-layer/DC-SIGN interaction. Materials and Methods Isolation of S-Layer Proteins S-layer proteins were extracted from overnight cultures of L. acidophilus ATCC 4356 cells grown in MRS medium at 37°C by usi...
Source: Frontiers in Microbiology - April 15, 2019 Category: Microbiology Source Type: research

Cellular Immune Function in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS)
This study was carried out in accordance with the recommendations of The London School of Hygiene & Tropical Medicine (LSHTM) Research Ethics Committee (Ref. 6123) and the National Research Ethics Service (NRES) London-Bloomsbury Research Ethics Committee (REC ref. 11/10/1760, IRAS ID: 77765), with written informed consent from all subjects. All subjects gave written informed consent in accordance with the Declaration of Helsinki. The protocol was approved by the LSHTM Research Ethics Committee and the NRES London-Bloomsbury Research Ethics Committee. Author Contributions JC, HD, LN, EL, and ER devised the study ...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

Lactobacillus plantarum KLDS1.0318 Ameliorates Impaired Intestinal Immunity and Metabolic Disorders in Cyclophosphamide-Treated Mice
Conclusion In conclusion, the present study showed that the oral administration of L. plantarum KLDS1.0318 normalized the parameters altered by CTX-induced toxicities, strengthening intestinal health by regulating the Th1/Th2 balance, ameliorating the intestinal morphology and improving profiles of intestinal microbiota and metabolism. Therefore, our findings suggested that the administration of L. plantarum KLDS1.0318 could be of significant advantage in reducing intestinal immunity impairment caused by cyclophosphamide. Ethics Statement This study was carried out according to the Animal Care Review Committee, Northeas...
Source: Frontiers in Microbiology - April 11, 2019 Category: Microbiology Source Type: research

Beyond CAR T Cells: Other Cell-Based Immunotherapeutic Strategies Against Cancer
Conclusions: CAR T cell therapies have demonstrated the clinical benefits of harnessing our body's own defenses to combat tumor cells. Similar research is being conducted on lesser known modifications and gene-modified immune cells, which we highlight in this review. Introduction Chimeric antigen receptors and engineered T cell receptors (based on previously identified high affinity T cell receptors) function by redirecting T cells to a predefined tumor-specific (or tumor-associated) target. Most of these modifications use retroviral or lentiviral vectors to integrate the construct, and most of the receptors ...
Source: Frontiers in Oncology - April 9, 2019 Category: Cancer & Oncology Source Type: research

BKV Clearance Time Correlates With Exhaustion State and T-Cell Receptor Repertoire Shape of BKV-Specific T-Cells in Renal Transplant Patients
This study was approved by our local ethical review committee in compliance with the declaration of Helsinki. Informed and written consent was obtained from all patients (Ethic Committee Charité University Medicine, Berlin, Germany, EA2/028/13). The study cohort consisted of 7 kidney transplant recipients with sustained BKV reactivation (Table 1). The HLA typing for each patient and donor is summarized in Figure 1. TABLE 1 Table 1. Characteristics of patients with BKV reactivation. FIGURE 1 Figure 1. Recipient and donor HLA type. HLA type of the patients and their kidney donors. Black square i...
Source: Frontiers in Immunology - April 9, 2019 Category: Allergy & Immunology Source Type: research

NIH researchers make progress toward Epstein-Barr virus vaccine
(NIH/National Institute of Allergy and Infectious Diseases) A research team led by scientists from NIH's National Institute of Allergy and Infectious Diseases (NIAID) has determined how several antibodies induced by Epstein-Barr virus (EBV), a herpesvirus that causes infectious mononucleosis and is associated with certain cancers, block infection of cells grown in the laboratory. They then used this information to develop novel vaccine candidates that, in animals, elicited potent anti-EBV antibody responses that blocked infection of cell types involved in EBV-associated cancers.
Source: EurekAlert! - Infectious and Emerging Diseases - April 9, 2019 Category: Infectious Diseases Source Type: news

Mind the Gap: How Interspecies Variability in IgG and Its Receptors May Complicate Comparisons of Human and Non-human Primate Effector Function
Conclusions The sheer number of factors to consider when translating observations between macaques and humans makes the process a challenging, multidimensional one. Differences in the structures and activities of IgG subclasses, and polymorphisms in protein sequence and post-translational modification of antibody receptors are a subset of the many relevant considerations. Copy number variation, splice variants, and alleles with sequence variation outside of coding regions have been associated with a diversity of phenotypes in humans (183, 213–217), and are presumed to exist in NHP. A number of differences in the p...
Source: Frontiers in Immunology - April 7, 2019 Category: Allergy & Immunology Source Type: research