Search results for "mononuclear cell"

Short-term preseasonal birch pollen allergoid immunotherapy influences symptoms, specific nasal provocation and cytokine levels in nasal secretions, …

1999

Backround Birch pollen allergic rhinitis can be sufficiently treated with specific subcutaneous allergoid immunotherapy (IT). However, little is known about the clinical and immunological effects of short-term therapy protocols. Objective To investigate the clinical efficacy of a birch pollen allergoid IT using seven preseasonal injections and to evaluate immunological parameters that might explain clinical findings. Methods Thirty-seven patients were included into the study and randomized to either a symptomatic treatment or allergoid IT plus symptomatic treatment. Patients were examined during the pre-IT season, at two extraseasonal visits both before and after IT and during the post-IT s…

Responses of human birch pollen allergen-reactive T cells to chemically modified allergens (allergoids)

1998

Background Allergoids are widely used in specific immunotherapy for the treatment of IgE-mediated allergic diseases. Objective The aim of this study was to analyse whether a modification of birch pollen allergens with formaldehyde affects the availability of T-cell epitopes. Methods Efficient modification of the allergens was verified by determining IgE and IgG binding activity using ELISA inhibition tests. T-cell responses to birch pollen allergoids were analysed in polyclonal systems, using peripheral blood mononuclear cells (PBMC) of five birch pollen-allergic individuals, as well as birch pollen extract-reactive T-cell lines (TCL), established from the peripheral blood of 14 birch polle…

Telomere attrition in peripheral blood mononuclear cells of children with alpha-1 antitrypsin deficiency

2015

Background: Our research group have demonstrated that oxidative stress (OS) is involved in the pathophysiology of alpha-1 antitrypsin deficiency (AATD) (Escribano A. et al. Thorax 2015;70:82-3). In addition, many evidences have shown that OS accelerates telomere shortening in several lung pathologies. Short telomeres have been associated to higher emphysema risk in COPD patients. Rationale: Since AATD is characterised by chronic OS, we hypothesise that telomere shortening would be accelerated in AATD patients and would be associated with higher risk of developing lung disease. Aims: To assess telomere length (TL) in AATD patients and to study its association with AAT phenotypes. Methods: TL…

Response to: 'IL-23 expression and activation of autophagy in synovium and PBMCs of HLA-B27 positive patients with ankylosing spondylitis' by Neerinc…

2014

We read with interest the study by Neerinckx et al 1 addressing the expression of interleukin (IL)-23p19 and of autophagy genes in the synovium and in the peripheral blood mononuclear cells of patients with ankylosing spondylitis (AS). Differently from our observation in the gut,2 the authors failed to demonstrate any significant increase by RT-PCR in the expression of synovium autophagy-related genes (ATG16L1, IRGM, MAP1LC3A, ATG5, HSPA8 and HSP90AA1) together with no significant overexpression of IL-23p19 compared with disease and healthy controls. We have previously demonstrated by immunohistochemistry that in the …

FRI0158 Prostaglandin e2 and its receptor subtype ep4 are involved in ankylosing spondylitis disease progression

2018

Background Single Nucleotide Polymorphisms (SNPs) in PTGER4 were found to be associated with Ankylosing spondylitis (AS) in GWAS. PTGER4 codes for the prostaglandin-E2 receptor EP4. PGE2/EP4 interaction can affect bone formation and inflammation. Objectives We studied serum PGE2 levels and SNPs in PTGER4 in relation to spinal fusion in AS patients. We also evaluated the interaction of smoking, PGE2 and EP4 in driving IL23 production and ILC3 functions. Methods Patients diagnosed with AS using the modified New York criteria and followed prospectively using a standardised protocol, were included in this study. Biological samples including serum, gut, synovial and bone marrow (BM) samples, DNA…

Evaluation of whole antioxidant defenses of human mononuclear cells by a new in vitro biological test: lack of correlation between erythrocyte and mo…

2009

1873-2933 (Electronic) Journal Article; OBJECTIVES: This work aims to evaluate the resistance of mononuclear cells to oxidative stress using a "KRL" test, formerly utilized to evaluate the resistance of erythrocyte to free radicals. METHODS: The "KRL" test evaluates the resistance to lysis of cells treated by free radicals generated under standardized conditions. RESULTS: We defined new analytical parameters (level of radical production, time course, number of cells) to obtain an accurate assay determining the resistance to oxidative stress of mononuclear cells, in comparison to that of erythrocytes. This test allows the evaluation of change in the redox state of mononuclear cells (improved…

FRI0344 IL-9 and CD4+Il9+ T Lymphocytes Are over Expressed in the Synovium of Patients with Rheumatoid Arthritis, Elicited in Vitro by Citrullinated …

2014

Background Rheumatoid Arthritis (RA) is a chronic autoimmune disease characterized by joint erosion and damage. Several cytokines and recruitment of auto-reactive lymphocytes (characterized by a marked shift toward the Th1 and Th17 phenotype) to inflamed tissue is a defined feature of the disease. In addition to Th1/Th17 and Th2 cells, another subset of effector T cells, identified by the potent production of IL-9 and named Th9 cells, has been recently demonstrated. IL-9 was found in particular to be increased before the clinical onset of the articular disease in RA patients, and associated with the presence of RA-related autoantibodies and circulating biomarkers of inflammation. The exact …

Proteomic analysis of Kveim reagent identifies targets of cellular immunity in sarcoidosis

2017

Background Kveim-reagent (Kv) skin testing was a historical method of diagnosing sarcoidosis. Intradermal injection of treated sarcoidosis spleen tissue resulted in a granuloma response at injection site by 4–6 weeks. Previous work indicates proteins as the possible trigger of this reaction. We aimed to identify Kv-specific proteins and characterise the ex vivo response of Peripheral Blood Mononuclear Cells (PBMCs) from sarcoidosis, tuberculosis and healthy control patients when stimulated with both Kv and selected Kv-specific proteins. Methods Kv extracts were separated by 1D-SDS-PAGE and 2D-DIGE and then underwent mass spectrometric analysis for protein identification. Sarcoidosis and con…

Combination of bexarotene and rosuvastatin at sub-optimal doses impairs angiotensin ii-induced arterial mononuclear cell adhesion

2014

Biocompatibility, hemocompatibility and antimicrobial properties of xyloglucan-based hydrogel film for wound healing application.

2018

Crosslinked xyloglucan-poly(vinyl alcohol) based hydrogel films are interesting materials for wound healing applications. This work focuses on the hydrolytic degradation and consequent morphological modification of a XG-PVA film and on its interaction with cells, blood, bacteria. Biocompatibility of the film was assessed in vitro by investigating different aspects, such as cell viability, oxidative stress level, mitochondrial dysfunction and specific stress biomarkers. Partial adhesiveness was demonstrated by performing different attaching assays and phalloidin staining. Hemocompatibility of XG-PVA film after interaction with blood was evaluated by using a multi-parametric approach, includi…