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Immunologic Research

Ana Beatriz da Silva Sacerdote, Norma Arteiro Filgueira, Silvana de Barros Barreto, Andréa Dória Batista, Edmundo Pessoa Lopes
Anti-rods and rings (anti-RR) antibodies are related to hepatitis C virus (HCV) in patients treated with pegylated interferon (PEG-IFN) and ribavirin (RBV). Only RBV induces rods/rings structures in vitro; but in vivo, the antibody appearance is related to the combination of these drugs, because data about patients using just one of these drugs alone is missing. Some studies suggest disappearance of these antibodies over time. The aim of this study was to describe the occurrence of anti-RR in patients with chronic hepatitis C treatment-naïve or previously PEG-IFN/RBV-experienced, evaluating the persistence of anti-RR antibodies long after PEG-IFN/RBV treatment...
September 15, 2018: Immunologic Research
Tamiris A Julio, Sebastian Vernal, Juliana D Massaro, Matheus C Silva, Eduardo A Donadi, Julio C Moriguti, Ana M Roselino
Bullous pemphigoid (BP) following dementia diagnosis has been reported in the elderly. Skin and brain tissues express BP180 and BP230 isoforms. Dementia has been associated with rs6265 (Val66Met) polymorphism of the brain-derived neurotrophic factor (BDNF) gene and low serum BDNF. Here we investigated a possible cross-antigenicity between BP180/BP230 brain and skin isoforms. We assessed antibodies against BP180/BP230 and BDNF levels by ELISA and BDNF Val66Met SNP by PCR in three groups: 50 BP patients, 50 patients with dementia, and 50 elderly controls...
September 15, 2018: Immunologic Research
Jose Omar Latino, Sebastián Udry, Silvia Perés Wingeyer, Diego Fernández Romero, Paula Micone, Gabriela de Larrañaga
Serological risk factors are the most important determinant in predicting unsuccessful pregnancy in obstetric antiphospholipid antibodies syndrome (OAPS) despite conventional treatment. It is not clear if changes in the profile of antiphospholipid antibodies (aPL) during pregnancy modify the risk associated with a poor response to conventional treatment. The aim of our study was to compare the value of a serological tag for aPL obtained before and during the first trimester of pregnancy to predict the response to conventional treatment...
August 29, 2018: Immunologic Research
Pingdong Jiang, Hui Sun
Atopic dermatitis (AD) is a chronic skin inflammatory disease characterized by uncontrolled Th2 cells response to environmental allergens. Long-term topical application of corticosteroids for treating AD may induce severe side effects. Sulfuretin is a major flavonoid found in Rhus verniciflua and carries antioxidant and anti-inflammatory properties. Its therapeutic effect on AD has not been characterized. We first studied the cytotoxic and regulatory effects of sulfuretin on differentiated Th2 cells. Next, we evaluated therapeutic effect of sulfuretin on AD-like damages caused by 2,4-dinitrochlorobenzene (DNCB) in a mouse model...
August 29, 2018: Immunologic Research
Sonali Agrawal, Om Parkash, Alangudi Natarajan Palaniappan, Ashok K Bhatia, Santosh Kumar, Devendra S Chauhan, M Madhan Kumar
Monitoring tuberculosis (TB) treatment success is crucial for clinical decision-making. The only available tool in this regard is sputum microscopy, but it has demerits. Moreover, in case of smear negatives and extrapulmonary TB, an efficient tool is still sought for. Therefore, we evaluated T regulatory cell (Treg)-associated markers (CD25, CD39, and FoxP3) and cellular subsets in monitoring treatment success in treatment-completed groups. Expression profile of various markers and subsets were compared real time among treatment-naive pulmonary TB patients (TN-PTB), followed-up treatment-completed (TC-fu) cohort, and a not followed-up (TC-nfu) cohort...
August 25, 2018: Immunologic Research
Alexandru Tatomir, Cosmin A Tegla, Alvaro Martin, Dallas Boodhoo, Vinh Nguyen, Adam J Sugarman, Armugam Mekala, Freidrich Anselmo, Anamaria Talpos-Caia, Cornelia Cudrici, Tudor C Badea, Violeta Rus, Horea Rus
Extracellular matrix (ECM) deposition in active demyelinating multiple sclerosis (MS) lesions may impede axonal regeneration and can modify immune reactions. Response gene to complement (RGC)-32 plays an important role in the mediation of TGF-β downstream effects, but its role in gliosis has not been investigated. To gain more insight into the role played by RGC-32 in gliosis, we investigated its involvement in TGF-β-induced ECM expression and the upregulation of the reactive astrocyte markers α-smooth muscle actin (α-SMA) and nestin...
July 13, 2018: Immunologic Research
Tanja Arndt, Anne Jörns, Dirk Wedekind
The LEW.1AR1-iddm rat is an animal model of human type 1 diabetes, which arose through a spontaneous mutation in the Dock8 gene within the MHC congenic background strain LEW.1AR1. This mutation not only mediates diabetes development but also leads to a variable T cell frequency in peripheral blood. In this study, the immune cell frequencies of primary and secondary lymphatic organs of LEW.1AR1-iddm rats were analysed at days 40 and 60 and compared to other MHC congenic LEW rat strains. In LEW.1AR1-iddm rats, the secondary lymphatic organs such as lymph nodes and spleen showed a reduced, around 15% in comparison to all other strains, but very variable T cell frequency, mirroring the fluctuating T cell content in blood...
August 2018: Immunologic Research
Jinfei Yu, Xiaorui Chen, Bo Li, Tiejun Gu, Xiangyu Meng, Wei Kong, Yongge Wu
Streptococcus pneumoniae is an important pathogen accounting for a large number of deaths worldwide. Despite the multitude of capsular polysaccharide vaccines used to guard against pneumococcal disease, fatal pneumococcal disease remains epidemic due to the narrow range of protection afforded by the capsular polysaccharide vaccines and rate of change in serotypes. The most promising solution is to develop an improved protein-based vaccine with broad protection. In this study, we tested a bivalent vaccine containing antigens mixed with the fusion protein PsaA-pneumococcal surface protein A (PspA)23 and single protein PspA4, including conserved PsaA and PspA from clades 2, 3, and 4 with coverage for families 1 and 2...
August 2018: Immunologic Research
Khalaf Kridin, Hadas Zamir, Arnon D Cohen
No abstract text is available yet for this article.
August 2018: Immunologic Research
Marina Miletic Kovacevic, Nada Pejnovic, Slobodanka Mitrovic, Nemanja Jovicic, Ivica Petrovic, Nebojsa Arsenijevic, Miodrag L Lukic, Biljana Ljujic
Experimental autoimmune myocarditis (EAM) is a mouse model of immune-mediated myocarditis and cardiomyopathy. The role of Galectin-3 (Gal-3), a β-galactoside-binding lectin, in autoimmune myocarditis has not been studied. Therefore, the aim of this study was to delineate the role of Gal-3 in myosin peptide-induced autoimmune myocarditis in mice. EAM was induced in relatively resistant C57BL/6J mice (wild type, WT) and in mice with a targeted deletion of Gal-3 gene (Gal-3KO) by immunization with myosin peptide MyHCα334-352 ...
August 2018: Immunologic Research
Yuan Tan, Yumeng Li, Yang Zhang, Jian Yu, Yating Wen, Chuan Wang, Man Xu, Qian Chen, Chunxue Lu, Yimou Wu
The present study evaluated the immune-protective efficacy of the Chlamydia psittaci (C. psittaci) plasmid protein CPSIT_p7 and analyzed the potential mechanisms of this protection. The current study used recombinant CPSIT_p7 protein with Freund's complete adjuvant and Freund's incomplete adjuvant to vaccinate BALB/c mice. Adjuvants alone or PBS formulated with the same adjuvants was used as negative controls. Mice were intranasally challenged with 105 inclusion-forming units (IFU) of C. psittaci. We found that CPSIT_p7 vaccination significantly decreased the mouse lung chlamydial load, interferon-γ (IFN-γ) level, and pathological injury...
August 2018: Immunologic Research
Nufar Marcus, Tali Stauber, Atar Lev, Amos J Simon, Jerry Stein, Arnon Broides, Ido Somekh, Shlomo Almashanu, Raz Somech
Newborn screening (NBS) programs for severe combined immunodeficiency (SCID), using the TREC-based assay, have enabled early diagnosis, prompt treatment, and eventually changed the natural history of affected infants. Nevertheless, it was believed that some affected infants with residual T cell, such as patients with MHC II deficiency, will be misdiagnosed by this assay. A full immune workup and genetic analysis using direct Sanger sequencing and whole exome sequencing have been performed to a patient that was identified by the Israeli NBS program for SCID...
August 2018: Immunologic Research
Quan Luo, Jingxin Zeng, Wei Li, Ling Lin, Xin Zhou, Xin Tian, Weiyu Liu, Lidan Zhang, Xibao Zhang
To investigate the association of MTHFR gene polymorphism and additional gene-gene interaction with psoriasis risk. GMDR model was used to screen the best gene-smoking and gene-drinking interaction combinations. Logistic regression was performed to investigate association between two SNPs and psoriasis. For psoriasis patient-control haplotype analyses, the SHEsis online haplotype analysis software ( ) was employed. We found that carriers of homozygous mutant of rs1801133 polymorphism and heterozygous of rs1801131 are associated with increased psoriasis risk than those with wild-type homozygotes, OR (95%CI) were 2...
August 2018: Immunologic Research
Hongqiang Li, Runv Zhou, Chunmei Wang, Yusheng Li, Guizhen Zheng, Sen Jiang, Tiancao Dong, Jianwen Bai, Shumin Xu
T follicular regulatory (Tfr) cell is a CXCR5+ Foxp3+ subset of T regulatory (Treg) cell with critical roles in regulating germinal center responses and modulating the immune environment in the lymph nodes. Studies have shown that the proportion of Tfr cells may increase during acute inflammation. In this study, we investigated the role of Tfr cells in acute respiratory distress syndrome (ARDS). We found that Tfr cells were significantly enriched in peripheral blood and in mini-bronchoalveolar lavage (BAL) during the onset of ARDS...
August 2018: Immunologic Research
Xiuzhen Li, Mengjun Wang, Hong Hong, Congjuan Luo, Zewei Liu, Ruiheng Yang
Inflammation contributes to the pathogenesis of lupus nephritis (LN), which is the most serious complication that increases mortality of systemic lupus erythematosus (SLE). Sophocarpine is a type of quinolizidine alkaloid that possesses anti-inflammatory property. This study investigated the speculation that sophocarpine might play a beneficial effect in LN. Female MRL/lpr mice received sophocarpine treatment for 8 weeks. Renal function and histopathology were evaluated. The level of immune complex deposition was measured by immunofluorescent staining, and the levels of proinflammatory cytokines (IL-1β, IL-6, and TNF-α) and anti-double-stranded DNA (anti-dsDNA) antibodies were measured by ELISA...
August 2018: Immunologic Research
Tarang Sharma, Chandresh Sharma, Anurag Sankhyan, Sanjiv Pal Bedi, Shinjini Bhatnagar, Navin Khanna, Vikas Gautam, Sunil Sethi, Sudhanshu Vrati, Ashutosh Tiwari
Typhoid fever caused by human restricted Salmonella typhi presents a considerable health burden on developing South-Asian nations like India. The suboptimal sensitivity and specificity associated with culture-based isolation of etiological agent and the extensively used surface antigen-based serological assays often lead to misdiagnosis and inappropriate antimicrobial treatment. The increasing reports of the emergence of resistant strains and undefined disease burden signify the critical need for an inexpensive, reliable, easy-to-use, and highly sensitive diagnostic test for typhoid fever...
June 21, 2018: Immunologic Research
Mohsen Saleh ElAlfy, Amira Abdel Moneam Adly, Fatma Soliman ElSayed Ebeid, Deena Samir Eissa, Eman Abdel Rahman Ismail, Yasser Hassan Mohammed, Manar Elsayed Ahmed, Aya Sayed Saad
Sickle cell disease (SCD) is associated with alterations in immune phenotypes. CD4+ CD28null T lymphocytes have pro-inflammatory functions and are linked to vascular diseases. To assess the percentage of CD4+ CD28null T lymphocytes, natural killer cells (NK), and IFN-gamma levels, we compared 40 children and adolescents with SCD with 40 healthy controls and evaluated their relation to disease severity and response to therapy. Patients with SCD steady state were studied, focusing on history of frequent vaso-occlusive crisis, hydroxyurea therapy, and IFN-gamma levels...
June 20, 2018: Immunologic Research
Pio Conti, Alessandro Caraffa, Gianpaolo Ronconi, Chiara M Conti, Spiros K Kritas, Filiberto Mastrangelo, Lucia Tettamanti, Theoharis C Theoharides
The purpose of this article is to study the involvement of inflammatory mast cells (MCs) in depression which may be inhibited by IL-37. We evaluate mast cells in depression on the basis of our previous experimental data, and using the most relevant studies reported in the literature. Dysfunction of mood, feelings, and thoughts is a major risk factor for several metabolic diseases and may influence the physiology of the body leading to depression. Depression, present in mastocytosis, is an important endogenous process that promotes the activation of meningeal cell receptors through a low-grade neurogenic chronic inflammation, and MCs...
June 16, 2018: Immunologic Research
Bjørn A Nexø
Recent genetic evidence points towards endogenous retroviruses as playing a pivotal role in the causation of multiple sclerosis and possibly other autoimmune diseases. We discuss various ways in which this association could be brought about. Specifically, we suggest that two endogenous retroviruses, HERV-Fc1 and HERV-K13, on chromosomes X and 19, respectively, contribute to the development of autoimmune T cells by transforming them in multiple sclerosis. Partially overlapping sets of endogenous retroviruses may play a role in other autoimmune diseases...
June 8, 2018: Immunologic Research
Maryam Azimi, Mojdeh Ghabaee, Abdorreza Naser Moghadasi, Farshid Noorbakhsh, Maryam Izad
Multiple sclerosis (MS) is an autoimmune disease which is characterized by neuroaxonal degeneration in the central nervous system. Impaired function of regulatory T cells (Tregs) is believed to be an underlying pathogenic mechanism in MS. Tregs is able to release exosomes, which contain a considerable amount of protein and RNA. Exosomes are capable of transporting their content to other cells where the released content exerts biological functions. Here, we investigated whether Tregs exosomes of RRMS patients or healthy controls might regulate the proliferation or survival of T lymphocytes...
June 7, 2018: Immunologic Research
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