In chronic obstructive pulmonary disease (COPD) patients airway mucosa is infiltrated by macrophages and T lymphocytes, potentially reactive to pathogens. We studied the antigen-specificity and the effector functions of in vivo activated T lymphocytes isolated from BAL (Bronchoalveolar lavage) of 5 Moraxella catarrhalis (Mc)-infected and 5 Mc-non-infected COPD patients. Mc-specific T cells were detected only in BAL or peripheral blood of Moraxella catarrhalis-infected patients. The majority of BAL Mc-specific T cells expressed the T helper type 1 (Th1) cytokine profile with high cytotoxic and pro-apoptotic activity. Upon antigen stimulation, all Mc-specific T clones were able to help the immunoglobulin production by autologous B cells and the MMP (Matrix MetalloProteinase)-12 activity by monocytes. Our results suggest a role for Th1-driven response to Moraxella catarrhalis in the genesis of COPD.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1177/039463200902200413 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of exercise training on modulating the TH17/TREG imbalance in individuals with severe COPD: A randomized controlled trial.
Pulmonology
December 2025
Laboratory of Experimental Therapeutics, LIM-20, Department of Clinical Medicine, School of Medicine, University of Sao Paulo, Sao Paulo, Brazil.
Background: Chronic obstructive pulmonary disease (COPD) induces an imbalance in T helper (Th) 17/regulatory T (Treg) cells that contributes to of the dysregulation of inflammation. Exercise training can modulate the immune response in healthy subjects.
Objective: We aimed to evaluate the effects of exercise training on Th17/Treg responses and the differentiation of Treg phenotypes in individuals with COPD.
Evaluation of the effectiveness of medroxyprogesterone on blood gases and short-term hospital outcomes in patients with chronic obstructive pulmonary disease treating with noninvasive ventilation: A randomized clinical trial.
J Res Med Sci
November 2024
Department of Internal Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
Background: In the present study, we aimed to evaluate the effects of medroxyprogesterone on hospital short clinical outcomes and ABG parameters in patients with chronic obstructive pulmonary disease (COPD) exacerbation under treatments with noninvasive ventilation (NIV) treated with progesterone 15 mg in comparison with placebo.
Materials And Methods: This is a double-blinded clinical trial that was performed in 2020-2021 in Isfahan, Iran, on 60 patients with COPD exacerbation that require NIV. All patients received short-acting beta-agonists, short-acting anticholinergics, systemic corticosteroids, and NIV.
Nurses' Reports of Inhaler Use Errors in Patients with Chronic Obstructive Pulmonary Disease in Hong Kong.
Int J Chron Obstruct Pulmon Dis
December 2024
School of Nursing and Health Sciences Hong Kong Metropolitan University, Hong Kong Special Administrative Region, People's Republic of China.
Background: Persistently high rates of inhaler errors and poor adherence among Chronic Obstructive Pulmonary Disease (COPD) patients contribute to ineffective symptomatic control, high care burdens, and increased healthcare resource utilization.
Objective: This study aimed to report (i) nurses-identified common problems and errors of inhaler use in COPD patients, (ii) nurses' attitudes, practices, training needs and required support in inhaler education.
Methods: An online questionnaire survey was conducted with nurses working in Hong Kong from May to June 2023 using an exponential, non-discriminative snowball sampling strategy.
Outcome and safety 90 days after combined airway valve treatment of the right upper and middle lobes in patients with severe pulmonary emphysema.
Respir Res
January 2025
Department of Pneumology and Critical Care Medicine, Thoraxklinik at the University Hospital Heidelberg, Heidelberg, Germany.
Background: In COPD patients with severe right-sided emphysema, complete major and incomplete minor fissure, implantation of one-way valves in both the right upper (RUL) and middle lobes (ML) is a possible approach for endoscopic lung volume reduction. The aim of this retrospective analysis was to evaluate the response to therapy and the complication rate at 90 days (90d-FU) after combined RUL-ML valve implantation.
Methods: This retrospective, monocentric study included all patients from the Thoraxklinik Heidelberg who underwent RUL-ML valve treatment between 2012 and 2023 with available follow-up data.
Association between lipid accumulation product and chronic obstructive pulmonary disease: a cross-sectional analysis.
BMC Pulm Med
January 2025
Pulmonary and Critical Care Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
Background: Research indicates that obesity can worsen the clinical manifestations of chronic obstructive pulmonary disease (COPD). Timely detection of COPD has the potential to enhance treatment results. This study seeks to investigate the association between a new metabolic indicator, the lipid accumulation product (LAP), and the risk of developing COPD.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!