ArticleBMC pulmonary medicine2015
Haemophilus influenzae induces steroid-resistant inflammatory responses in COPD.
Article in BMC pulmonary medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 21 citations in OpenAlex.
- Extracellular vesicles from bronchoalveolar lavage fluid provide insights into the inhaled corticosteroids treatment response in COPD.Respiratory research · 2025Trial
- Bronchial and Systemic Relationships ofInternational journal of molecular sciences · 2026Article
- c-Ski is a novel repressor of NF-κB through interaction with p65 and HDAC1 in U937 cells.Cell communication and signaling : CCS · 2025Article
- Potential role of the antimicrobial peptide Tachyplesin III in regulating nontypeable Haemophilus influenzae-induced inflammation in airway epithelial cells.Archives of microbiology · 2024Article
- Article
- How inhaled corticosteroids target inflammation in COPD.European respiratory review : an official journal of the European Respiratory Society · 2023Review
- Effects of Inhaled Corticosteroids on the Innate Immunological Response toInternational journal of molecular sciences · 2022Article
- Metformin alleviates chronic obstructive pulmonary disease and cigarette smoke extract-induced glucocorticoid resistance by activating the nuclear factor E2-related factor 2/heme oxygenase-1 signaling pathway.The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology · 2022Article
- Preclinical and clinical progress for HDAC as a putative target for epigenetic remodeling and functionality of immune cells.International journal of biological sciences · 2021Review
- Role of Histone Deacetylases in Monocyte Function in Health and Chronic Inflammatory Diseases.Reviews of physiology, biochemistry and pharmacology · 2021Review
- Preclinical Evaluation of the Antimicrobial-Immunomodulatory Dual Action of Xenohormetic Molecules againstBiomolecules · 2019Article
- Machine Learning Approach for Predicting Past Environmental Exposures From Molecular Profiling of Post-Exposure Human Serum Samples.Journal of occupational and environmental medicine · 2019Article
- Insights on persistent airway infection by non-typeable Haemophilus influenzae in chronic obstructive pulmonary disease.Pathogens and disease · 2017Review
- Mechanisms of corticosteroid insensitivity in COPD alveolar macrophages exposed to NTHi.Respiratory research · 2017Article
Corrections and comments
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Authors and funding
6 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundChronic obstructive pulmonary disease (COPD) is an inflammatory disorder partially resistant to glucocorticoids. A reduced histone deacetylase (HDAC) activity has been proposed to explain this resistance. Haemophilus influenzae frequently colonizes the airways of COPD patients, where it enhances inflammation. The effects of Haemophilus influenzae on HDAC activity have not been investigated before.
methodsThe effects of the presence or absence of Haemophilus influenzae ex-vivo and in vitro were studied. To this end, we determined: (1) cytokine release in alveolar macrophages (AM) from 7 patients with COPD, 5 healthy smokers, 6 healthy non-smokers and (2) HDAC activity, nuclear factor kappa B (NF-κB) activation in a macrophage-like cell line (PMA-transformed U937 cells) co-cultured with epithelial cells. Experiments were repeated with dexamethasone (1 μM) and/or the HDAC enhancer theophylline (10 μM).
resultsHaemophilus influenzae induced a steroid-resistant inflammatory response in AM from COPD and controls and decreased HDAC activity, activated NF-κB and induced the secretion of several cytokines (IL-6, IL-8, IL-1β, IL-10 and TNF-α) (p < 0.001 for all comparisons) in the macrophage-like cell line. Dexamethasone reduced NF-κB activation but it did not modify HDAC activity. The addition of theophylline to dexamethasone increased HDAC activity and suppressed cytokine release completely, without modifying NF-κB activation.
conclusionsThese results indicate that Haemophilus influenzae reduces HDAC activity and induces a NF-κB mediated inflammatory response that is only partially suppressed by glucocorticoids irrespective of having COPD. Yet, the latter can be fully restored by targeting HDAC activity.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.