Human bronchial epithelial cells (HBECs) have first-line contact with harmful substances during smoking, and changes in their metabolism most likely represent a defining factor in coping with the stress and development of airway diseases. This study was designed to determine the dynamics of metabolome changes in HBECs treated with cigarette smoke condensate (CSC), and to test whether normal metabolism can be restored by synthetic antioxidants. Principal component analysis, based on untargeted mass spectra, indicated that treatment of CSC-exposed HBECs with O-methyl-L-tyrosinyl-γ-L-glutamyl-L-cysteinylglycine (UPF1) acted faster than did N-acetylcysteine to revert the effect of CSC. The maximum effect of 10 μg/ml CSC itself on HBEC cell line, BEAS-2B, metabolism was seen at 2 hours after treatment, with return to the baseline level by 7 hours. In primary HBECs, the initial maximum effect was seen at 1 hour after CSC exposure. Certain metabolites associated with redox pathways and energy production were affected by CSC. Subsequent restoration of their content by UPF1 supports the hypothetical protective capacity of UPF1 against the oxidative stress and increased energy demand, respectively. Furthermore, UPF1 up-regulated the contents of phospholipid species identified as phosphatidylcholines and phosphatidylethanolamines in the CSC-exposed HBECs, indicating possible suppression of inflammatory processes along with an increase in spermidine as an endogenous cytoprotector. In conclusion, with this dynamic metabolomics study, we characterize the durability of the CSC-induced metabolic changes in BEAS-2B line cells and primary HBECs, and demonstrate the ability of UPF1 to significantly accelerate the recovery of HBECs from CSC insult.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1165/rcmb.2013-0377OC | DOI Listing |
Allergol Immunopathol (Madr)
January 2025
Geriatric Department, Suzhou Hospital of Integrated Traditional Chinese and Western Medicine, Suzhou City, Jiangsu Province, China;
Chronic obstructive pulmonary disease (COPD) is characterized by chronic inflammation, airway obstruction, and lung damage, often triggered by cigarette smoke. Dysregulated autophagy and inflammation are key contributors to its progression. Although double-stranded RNA-binding protein Staufen homolog 1 (STAU1), a multifunctional protein primarily involved in mRNA transport and localization, is identified as a potential biomarker, its role in COPD pathogenesis remains unclear.
View Article and Find Full Text PDFAm J Respir Cell Mol Biol
January 2025
Harvard University T H Chan School of Public Health, Boston, Massachusetts, United States;
In asthma, tissue factor (TF) levels are elevated in the lung. In our previous studies using mechanically compressed human bronchial epithelial (HBE) cells, which are a well-defined in vitro model of bronchoconstriction during asthma exacerbations, we detected TF within extracellular vesicles (EVs) released from compressed HBE cells. Here, to better characterize the potential role of this mechanism in asthma, we tested the extent to which the transcriptional regulation of epithelial cell-derived TF varied between donors with and without asthma.
View Article and Find Full Text PDFViruses
December 2024
Faculty of Science and Technology, University of Canberra, Canberra, ACT 2617, Australia.
The global burden of respiratory syncytial virus (RSV) and severe associated disease is prodigious. RSV-specific vaccines have been launched recently but there is no antiviral medicine commercially available. RSV polymerase (L) protein is one of the promising antiviral targets, along with fusion and nucleocapsid proteins.
View Article and Find Full Text PDFPharmaceuticals (Basel)
December 2024
Department of Life, Health and Environmental Sciences, University of L'Aquila, Piazzale Salvatore Tommasi 1, Blocco 11, Coppito, 67010 L'Aquila, Italy.
Background/objectives: Infectious diseases represent a serious threat due to rising antimicrobial resistance, particularly among multidrug-resistant bacteria and influenza viruses. Metal-based complexes, such as -heterocyclic carbene-gold (NHC-gold) complexes, show promising therapeutic potential due to their ability to inhibit various pathogens.
Methods: Eight NHC-gold complexes were synthesized and tested for antibacterial activity against , , and for anti-influenza activity in lung and bronchial epithelial cells infected with influenza virus A/H1N1.
Molecules
December 2024
Department of Life Sciences and Biotechnology, Ferrara University, 44121 Ferrara, Italy.
Garlic ( L.) is a species of the onion family () widely used as a food and a folk medicine. The objective of this study was to determine the effects of AGE (aged garlic extract) on pro-inflammatory genes relevant to COVID-19.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!