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Hao W, Zhu Y, Guo Y, Wang H. miR-1287-5p upregulation inhibits the EMT and pro-inflammatory cytokines in LPS-induced human nasal epithelial cells (HNECs). Transpl Immunol 2021; 68:101429. [PMID: 34139308 DOI: 10.1016/j.trim.2021.101429] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/10/2021] [Accepted: 06/10/2021] [Indexed: 12/28/2022]
Abstract
BACKGROUND Chronic rhinosinusitis is an intractable symptom that influences daily lives of patients. miR-1287-5p was discovered to play a suppressive role in cervical cancer and HBV-related infection. PURPOSE This study investigated the potential role of miR-1287-5p in the in-vitro model of chronic rhinosinusitis. METHODS GSE169376 dataset was analyzed and differential miRNAs in nasal mucosa tissues in the chronic rhinosinusitis group were screened out. LPS was used to treat HNECs for 12h, 24h and 48h. Cells underwent LPS treatment after SNAI1 downregulation, miR-1287-5p upregulation or pretreatment of the HMGB1 inhibitor, Glycyrrhizin. RT-PCR was used to measure the RNA expression of miR-1287-5p, SNAI1 and HMGB1. ELISA was used for the detection of IL-6, IL-8, TNF-α changes. Targetscan and starBase were used to predict the targets (SNAI1 and HMGB1) of miR-1287-5p. Dual-luciferase reporter assays were applied to validate this. Western blot was used to analyze the protein changes of Snai1, Vimentin, E-cadherin and HMGB1. RESULTS miR-1287-5p was downregulated in the chronic rhinosinusitis group and decreased after LPS treatment in HNECs. The upregulation of miR-1287-5p inhibited IL-6, IL-8, TNF-α and EMT. miR-1287-5p targeted and inhibited SNAI1 and HMGB1. SNAI1 downregulation led to inhibition in EMT while loss of HMGB1 contributed to the decrease in pro-inflammatory cytokines. Knockdown of SNAI1 decreased HMGB1, resulting in the reduction of pro-inflammatory cytokines while HMGB1 inhibitor reduced SNAI1 and thus suppressed the EMT process. CONCLUSION miR-1287-5p downregulation was associated with chronic rhinosinusitis and its upregulation inhibited the EMT and inflammation in LPS-induced HNECs through Snai1/HMGB1 pathway.
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Affiliation(s)
- Wenwei Hao
- Department of Otolaryngology, Tianjin Medical University General Hospital, No. 154 Anshan Road, Heping District, Tianjin 300052, China.
| | - Yongping Zhu
- Department of anesthesiology, Tianjin Eye Hospital, 4 Gansu Road, Heping District, Tianjin 300052, China
| | - Ying Guo
- Department of Otolaryngology, Tianjin Medical University General Hospital, No. 154 Anshan Road, Heping District, Tianjin 300052, China
| | - Haowei Wang
- Department of Otolaryngology, Tianjin Medical University General Hospital, No. 154 Anshan Road, Heping District, Tianjin 300052, China
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Phosphorylation-dependent modulation of CFTR macromolecular signalling complex activity by cigarette smoke condensate in airway epithelia. Sci Rep 2019; 9:12706. [PMID: 31481727 PMCID: PMC6722123 DOI: 10.1038/s41598-019-48971-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 08/07/2019] [Indexed: 12/15/2022] Open
Abstract
Genetic and acquired loss-of-function defect of the cystic fibrosis transmembrane conductance regulator (CFTR) compromise airway surface liquid homeostasis and mucociliary clearance (MCC), culminating in recurrent lung inflammation/infection. While chronic cigarette smoke (CS), CS extract (CSE; water-soluble compounds) and CS condensate (CSC; particulate, organic fraction) exposure inhibit CFTR activity at transcriptional, biochemical, and functional levels, the acute impact of CSC remains incompletely understood. We report that CSC transiently activates CFTR chloride secretion in airway epithelia. The comparable CFTR phospho-occupancy after CSC- and forskolin-exposure, determined by affinity-enriched tandem mass spectrometry and pharmacology, suggest that localised cAMP-dependent protein kinase (PKA) stimulation by CSC causes the channel opening. Due to the inhibition of the MRP4/ABCC4, a cAMP-exporter confined to the CFTR macromolecular signalling-complex, PKA activation is accomplished by the subcompartmentalised elevation of cytosolic cAMP. In line, MRP4 inhibition results in CFTR activation and phospho-occupancy similar to that by forskolin. In contrast, acute CSC exposure reversibly inhibits the phosphorylated CFTR both in vivo and in phospholipid bilayers, without altering its cell surface density and phospho-occupancy. We propose that components of CSC elicit both a transient protective CFTR activation, as well as subsequent channel block in airway epithelia, contributing to the subacute MCC defect in acquired CF lung diseases.
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Schögler A, Blank F, Brügger M, Beyeler S, Tschanz SA, Regamey N, Casaulta C, Geiser T, Alves MP. Characterization of pediatric cystic fibrosis airway epithelial cell cultures at the air-liquid interface obtained by non-invasive nasal cytology brush sampling. Respir Res 2017; 18:215. [PMID: 29282053 PMCID: PMC5745630 DOI: 10.1186/s12931-017-0706-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 12/18/2017] [Indexed: 12/16/2022] Open
Abstract
Background In vitro systems of primary cystic fibrosis (CF) airway epithelial cells are an important tool to study molecular and functional features of the native respiratory epithelium. However, undifferentiated CF airway cell cultures grown under submerged conditions do not appropriately represent the physiological situation. A more advanced CF cell culture system based on airway epithelial cells grown at the air-liquid interface (ALI) recapitulates most of the in vivo-like properties but requires the use of invasive sampling methods. In this study, we describe a detailed characterization of fully differentiated primary CF airway epithelial cells obtained by non-invasive nasal brushing of pediatric patients. Methods Differentiated cell cultures were evaluated with immunolabelling of markers for ciliated, mucus-secreting and basal cells, and tight junction and CFTR proteins. Epithelial morphology and ultrastructure was examined by histology and transmission electron microscopy. Ciliary beat frequency was investigated by a video-microscopy approach and trans-epithelial electrical resistance was assessed with an epithelial Volt-Ohm meter system. Finally, epithelial permeability was analysed by using a cell layer integrity test and baseline cytokine levels where measured by an enzyme-linked immunosorbent assay. Results Pediatric CF nasal cultures grown at the ALI showed a differentiation into a pseudostratified epithelium with a mucociliary phenotype. Also, immunofluorescence analysis revealed the presence of ciliated, mucus-secreting and basal cells and tight junctions. CFTR protein expression was observed in CF (F508del/F508del) and healthy cultures and baseline interleukin (IL)-8 and IL-6 release were similar in control and CF ALI cultures. The ciliary beat frequency was 9.67 Hz and the differentiated pediatric CF epithelium was found to be functionally tight. Conclusion In summary, primary pediatric CF nasal epithelial cell cultures grown at the ALI showed full differentiation into ciliated, mucus-producing and basal cells, which adequately reflect the in vivo properties of the human respiratory epithelium. Electronic supplementary material The online version of this article (10.1186/s12931-017-0706-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Aline Schögler
- Department of Clinical Research, University of Bern, Bern, Switzerland.,Division of Respiratory Medicine, University Children's Hospital of Bern, Bern, Switzerland
| | - Fabian Blank
- Department of Clinical Research, University of Bern, Bern, Switzerland.,Department of Pulmonary Medicine, University Hospital of Bern, Bern, Switzerland
| | - Melanie Brügger
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland.,Institute of Virology and Immunology, Federal Department of Home Affairs, Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Seraina Beyeler
- Department of Clinical Research, University of Bern, Bern, Switzerland.,Department of Pulmonary Medicine, University Hospital of Bern, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | | | | | - Carmen Casaulta
- Division of Respiratory Medicine, University Children's Hospital of Bern, Bern, Switzerland
| | - Thomas Geiser
- Department of Pulmonary Medicine, University Hospital of Bern, Bern, Switzerland
| | - Marco P Alves
- Department of Clinical Research, University of Bern, Bern, Switzerland. .,Division of Respiratory Medicine, University Children's Hospital of Bern, Bern, Switzerland. .,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland. .,Institute of Virology and Immunology, Federal Department of Home Affairs, Mittelhäusern, Switzerland. .,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
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