Iranian journal of allergy, asthma, and immunology最新文献

This study explored the link between clinical features, immune markers, and asthma-chronic obstructive pulmonary disease overlap (ACO), aiming to enhance diagnostic precision and tailor treatment. The study included 60 patients per group: COPD patients, ACO patients, and healthy controls. Biological indicators such as fractional exhaled nitric oxide (FeNO), eosinophils, immunoglobulin E (IgE), T helper (Th) 17 cell counts, regulatory T-cell (Treg) counts, and cytokine levels of interleukin-17 (IL-17) and interleukin-10 (IL-10) were measured using standard enzyme-linked immunosorbent assay and flow cytometry techniques. Elevated Th17 cells, IL-17, and Th17/Treg ratio, alongside reduced IL-10 and Treg levels, were observed in COPD and ACO patients. ACO patients showed worse lung function, with a negative correlation between FeNO, Th17 cells, Th17/Treg ratio, IL-17, and lung function indices, and a positive correlation with residual volume/total lung capacity (RV/TLC) ratio. The study suggests that Th17/Treg imbalance, FeNO, eosinophils, and IgE could be key in ACO pathogenesis, potentially aiding early diagnosis and targeted treatment. Future research may utilize these findings to develop preventative and therapeutic strategies for ACO.

The exact cause of psoriatic arthritis is still unknown, but hypotheses suggest the role of hematological parameters in the onset and severity of the disease. This study evaluated the hematological indices and their association with skin and joint activity in psoriatic arthritis. This cross-sectional study included 74 patients with psoriatic arthritis. Demographical and clinical data, blood indices, psoriasis area and severity index (PASI) score and disease activity in psoriatic arthritis (DAPSA) scores were calculated for all patients. The mean age of the patients was 48.89±12.03 years and most were female (n=49). A significant correlation was observed between age and number of underlying diseases with PASI and DAPSA scores. Mean PASI and DAPSA scores were 5.19 and 15.13, respectively. The severity of psoriasis was mild in 58.1%, moderate in 36.5%, and severe in 4.5% of the cases. The activity of psoriatic arthritis was improved in 2.1%, low in 55.4%, moderate in 24.3%, and high in 1.8% of the patients. A significant association was found between erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), red cell distribution width (RDW), neutrophil-to-lymphocyte ratio (NLR), platelet (PLT) count, mean platelet volume (MPV), and PASI scores, while no statistically significant association was reported for PLR. A significant correlation was observed between ESR, CRP, RDW, NLR, PLR, PLT, and DAPSA scores, while no statistically significant association was found for MPV. The findings indicated that inflammatory and hematological markers can be helpful factors in evaluating the severity of psoriasis and psoriatic arthritis.

Asthma is a prevalent chronic inflammatory disorder in children, and poor therapeutic response in asthmatic children could result from various factors related to the doctor, patient, disease, and treatment. This study aimed to evaluate the most important causes of failure in asthma control. One hundred three children referred to the Children's Medical Center in Tehran, Iran, participated in this study in 2017. A specific questionnaire was organized and completed by telephone interviews with parents. The mean age of participants was 10.30 years, and 68.9% were male. More action plans (45/53) were received from hospitalized patients in the asthma and allergy ward than from hospitalized patients in the emergency department (13/46). Moreover, 85% of admitted patients in the asthma and allergy ward were visited by a specialist compared with 50% in the emergency department (23/46). Hospitalization in the asthma and allergy ward resulted in receiving more action plans, spirometry tests, and visits by an allergist after discharge compared with admission to the emergency department.

Melittin is a natural toxin used in traditional medicine as an anti-inflammatory drug. It seems that the anti-inflammatory properties of melittin are caused by suppressing the expression of inflammatory genes and inhibiting signaling pathways. However, the use of melittin is limited due to instability, rapid degradation, and impurity. The aim of this study was to investigate the intranasal administration of a melittin-encoded plasmid as a new melittin delivery method for allergic diseases. After the induction of a mouse model of allergic rhinitis, mice received intranasal melittin plasmid. After the final challenge with allergen and allergic symptom assessment, the required samples were collected and transforming growth factor-beta (TGF-β), interferon-gamma (IFN-γ), and interleukin-4 (IL-4) cytokine levels, serum levels of ovalbumin-specific immunoglobulin (Ig) E, and histopathological changes were assessed. In addition to investigating the immune response, the effect of melittin on the expression level of genes involved in apoptosis was also investigated. The melittin plasmid significantly improved nasal symptoms and decreased eosinophil infiltration into the nasal mucosa. Moreover, melittin decreased the expression levels of IL-4 and TGF-β in nasal lavage fluid, while IFN-γ expression was increased. Regarding the expression level of genes involved in apoptosis, melittin led to an increase in BAX mRNA expression. These results suggest intranasal administration of a plasmid encoding melittin can suppress nasal symptoms, eosinophil infiltration, and immunomodulation of the immune response, which can be considered a promising approach in the treatment of inflammatory diseases.

Chronic rhinosinusitis is divided into two groups, which are Chronic rhinosinusitis with nasal polyps (CRSwNP) and without nasal polyps (CRSsNP). The rate of post-surgical recurrence in the CRSwNP is high, and predicting factors are unknown. This study aims to identify and evaluate risk factors associated with treatment-resistant and recurrent CRSwNP. This cross-sectional study evaluates demographic data and atopic risk factors in patients with CRSwNP, including a high IgE level (≥100 U/mL), skin prick test (SPT) for aeroallergens, aspirin-exacerbated respiratory disease (AERD), and asthma prevalence. An oral aspirin challenge was performed to diagnose AERD. 191 patients with CRSwNP were enrolled, with 73 patients in the recurrent, and 118 patients in the non-recurrent group. The mean age of the patients in the recurrent group was 45.08±12.05. The mean age of the patients in the non-recurrent group was 42.89±11.73. 49. Asthma prevalence in recurrent- CRSwNP is significantly higher than non-recurrent CRSwNP Asthma severity in recurrent CRSwNP and AERD patients was significantly higher than in nonrecurrent CRSwNP and non-AERD patients. The level of IgE in the recurrent- CRSwNP is higher than non-recurrent CRSwNP. Positive SPT results for tree, weed, and mite allergens were higher in the non-recurrent- CRSwNP group compared to the recurrent CRSwNPgroup. Asthma had a significantly higher difference in AERD compared to non-AERD. The level of IgE in AERD is higher than non-AERD. Recurrent CRSwNP patients and AERD patients had Higher IgE levels. Asthma is more prevalent and more severe in both AERD and recurrent CRSwNP. However, a positive SPT result has been seen higher in non-recurrent CRSwNP.

The purpose of this study is to investigate the effect of air pollutants and noise on the prevalence of childhood asthma in Tehran, Iran. The standardized questionnaire was completed by one of the parents of children aged 6-7 years or by adolescents aged 13-14 years. The asthma prevalence in ages 6-7 and 13-14 was found to be 8.8% and 17.44%, respectively. A significant positive association was observed between "ever wheezing" and monoxide carbon (CO) concentration (OR=1.84, 1.05-3.25 in 13-14 years), the occurrence of 4 to 12 wheezing attacks and sulfur dioxide (SO2) concentration (Odds Ratio (OR)=1.39, 1.04-1.91) and particulate matter less than 2.5 micron (PM2.5) concentration (OR=1.38, 1.05-1.98 and OR=1.13, 0.98-1.39 in 6-7 and 13-14 years, respectively), as well as one night per week of sleep disturbances and nitrogen dioxide (NO2) concentration (OR=1.09, 1.03-1.16 in 6-7 years, respectively). It was also found that there was a significant interaction between the noise level and particulate matter less than 10 micron (PM10) level. Based on the findings, exposure to certain outdoor air pollutants and noise can affect prevalence of asthma symptoms in residence of Tehran. The simultaneous presence of air pollutants and noise has an aggravating effect on the prevalence of asthma symptoms. Therefore, controlling sources of pollutants for reducing asthma symptoms is suggested.

Glenohumeral osteoarthritis (GOA) is characterized by chronic inflammation leading to joint damage. Extracellular vesicles (EVs) derived from mesenchymal stem cells (MSCs) are promising therapies because of their immunomodulatory functions. The anti-inflammatory effects of EVs from human Adipose-derived MSCs (hADSCs) overexpressing microRNA (miR)-146a were investigated in experimental GOA in this study. hADSCs were transfected with a mimic negative control or miR-146a mimics. GOA was induced in C57/Bl6j mice, and subsequently, the animals were treated intra-articularly with phosphate-buffered saline, miR-146a EVs, or miR-control EVs. The expression of miR-146a and its targeted cytokines interleukin (IL)-4, IL-10, tumor necrosis factor-alpha (TNF-α), IL-17, and interferon-gamma (IFN-γ) were analyzed in the spleen of mice by enzyme-linked immunosorbent assay and in the articular cartilage by real-time polymerase chain reaction. miR-146a EVs showed enrichment of miR-146a. In GOA mice, miR-146a EV treatment significantly reduced expression levels of inflammatory cytokines IFN-γ, IL-17, and TNF-α and increased the anti-inflammatory cytokine IL-10 and IL-4 compared to controls. miR-146a EV treatment raised the anti-inflammatory cytokines and reduced the pro-inflammatory cytokines of the spleen in treated mice. This study demonstrates that EVs derived from hADSCs overexpressing miR-146a have enhanced anti-inflammatory potential in GOA by modulating cytokine expression and production. EVs engineered with inflammation-related miRNAs could be a cell-free therapeutic approach for GOA.

Emodin, derived from Rheum officinale and aloe, is known for its diverse benefits such as anti-inflammatory, antioxidant, and antibacterial properties. Currently, the impact of emodin on urosepsis is unclear. This study aims to investigate the mechanism of action of emodin in urosepsis. Peripheral blood mononuclear cells (PBMCs) were purchased from Cloud-Clone Animal Inc. and treated with emodin. Cell viability and the lactate dehydrogenase (LDH) level were then assessed. In a separate experiment a urosepsis model was established in Sprague Dawley rats which were subsequently treated with emodin. The levels of oxidative stress-related factors, serum complements and inflammatory factors were measured using commercial kits. Blood urea nitrogen and serum creatinine levels were determined using a fully automatic biochemical analyzer. The levels of pro-inflammatory proteins and AMP-activated protein kinase (AMPK)/Sirtuin 1 (SIRT1) pathway-related proteins were evaluated via Western blot. PBMCs were unaffected by emodin concentrations below 60 μg/mL, and minimal LDH levels were detected in the cells. Emodin attenuated the effects of Escherichia coli and diminished the production of serum complements, oxidative stress-related proteins, and inflammatory factors in PBMCs. Notably, the effects of emodin were lessened by an AMPK pathway inhibitor. Additionally, emodin alleviated oxidative stress, complement system activation, inflammation, and kidney injury in urosepsis rats through the AMPK/SIRT1 signaling pathway. Emodin improved kidney damage in urosepsis rats by activating the AMPK/SIRT1 signaling pathway, which reduced oxidative stress, inflammation, and complement system activation.

This study aimed to investigate the expression of programmed cell death protein-1 (PD-1) and its ligand (PD-L1) immune checkpoint molecules in thyroid carcinomas and determine their association with the clinicopathological characteristics of patients. Thyroid tissue specimens from 100 patients diagnosed with primary thyroid carcinomas including papillary thyroid carcinoma (PTC), follicular thyroid carcinoma (FTC), medullary thyroid carcinoma (MTC), and anaplastic thyroid carcinoma (ATC) were collected. Sections were prepared from formalin-fixed paraffin-embedded samples, and PD-1 and PD-L1 expressions were examined using immunohistochemistry. PD-1 was detected in tumor-infiltrating lymphocytes (TILs) in 88% of the patients and tumor cells in 28% of the patients with 10% in PTC, 5% in FTC, 5% in MTC, and 8% in ATC). PD-L1 was found in tumor cells and TILs in 30% and 79% of the patients, respectively. Moreover, a significant difference was observed in PD-1 and PD-L1 expression between tumor cells and TILs across different tumor types. However, their expression in tumor cells and TILs was significantly higher in ATC compared to other tumor types. Additionally, the expression of PD-1 and PD-L1 was significantly associated with an advanced stage, higher tumor size, tumor necrosis, and mitosis. A significant positive correlation was also observed between the expression of PD-1 and PD-L1 in tumor cells and TILs. The higher expression of PD-1 and PD-L1 may contribute to tumor progression. Therefore, combinational immunotherapy by these immune checkpoint inhibitors might be a promising strategy for clinical improvement in patients with thyroid cancer, especially those with ATC.

Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by synovial tissue transformation and fibroblast-like synoviocyte (FLS) proliferation. Galectin-3 is gaining attention as a diagnostic and prognostic biomarker for RA diagnosis. Elevated levels of Galectin-3 cause RA-FLSs to stimulate and generate proinflammatory agents, contributing to cartilage degradation and osteoclast formation. This systematic review and meta-analysis aimed to evaluate published evidence and support future investigation of Galectin-3 as an early biomarker for RA. A systematic search was performed through four databases, including PubMed, the Web of Science, Scopus, and Embase, to find the studies examining Galectin-3 in individuals with RA compared to healthy controls. The risk of bias was evaluated using the Newcastle-Ottawa Quality Assessment Scale. Random-effects meta-analysis comparing serum/plasma Galectin-3 levels between individuals with RA and healthy control groups was performed to determine the standardized mean differences (SMD) along with 95% confidence intervals. Following the initial search, studies went through screening. 12 studies, involving 773 patients with RA and 411 healthy controls, were included. Meta-analysis of the included studies revealed that individuals with RA had significantly higher levels of circulatory Galectin-3 compared to healthy control groups (SMD 0.957, 95% CI 0.393 to 1.520). Univariable meta-regression showed no significant association between age, publication year, sample size, or the male percentage with effect size. According to the results, Galectin-3 might be useful as a biomarker for RA. To support these findings, further investigations of Galectin-3 as a possible early biomarker of RA is necessary.