1
|
Iszatt J, Garratt L, Larcombe A, Stick S, Kicic A. 52: CHARACTERISING BACTERIOPHAGES ACTIVE AGAINST STAPHYLOCOCCUS AUREUS BACTERIA. J Glob Antimicrob Resist 2022. [DOI: 10.1016/s2213-7165(22)00331-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
|
2
|
Vaitekenas A, Tai AS, Ramsay JP, Agudelo-Romero P, Stick SM, Kicic A. 51: ASSESSING PHAGE RESISTANCE EVOLUTION BY DISTINCT PSEUDOMONAS AERUGINOSA ISOLATES FROM INDIVIDUALS WITH CYSTIC FIBROSIS. J Glob Antimicrob Resist 2022. [DOI: 10.1016/s2213-7165(22)00330-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
|
3
|
Mercier J, Calmel C, Mésinèle J, Sutanto E, Kicic A, Boëlle P, Corvol H, Ruffin M, Guillot L. 642: SLC6A14 is associated with lung function in patients with cystic fibrosis, regulates epithelial repair and mTOR signaling in bronchial epithelial cells. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)02065-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
4
|
Slimmen L, Schofield C, Horati H, Giacalone V, Kicic A, Stick S, Tirouvanziam R, Garratt L, Janssens H, Unger W. 377: Airway macrophages in early CF lung disease show signs of immune paralysis. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01801-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
5
|
Ling K, Garratt L, Berry L, Kicic A, Stick S. 436: Effects of rhinovirus on airway-associated mucins in young children with cystic fibrosis. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01860-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
6
|
Agudelo-Romero P, Ling K, Lavender M, Wrobel J, Musk M, Stick S, Kicic A. 184: Regional transcriptional signatures identified in lung allograft recipients. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01609-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
7
|
Laucirica D, Schofield C, McLean S, Margaroli C, Agudelo-Romero P, Stick S, Tirouvanziam R, Kicic A, Garratt L. 348: Pseudomonas aeruginosa infection modulates primary granule exocytosis. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01772-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
8
|
Wannigama D, Hurst C, Monk P, Stick S, Kicic A, Chatsuwan T. Novel broad-spectrum peptide therapy reverses respiratory infections with multidrug-resistant gram-negative bacteria. Int J Antimicrob Agents 2021. [DOI: 10.1016/j.ijantimicag.2021.106421.27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Iszatt J, Ng R, Vaitekenas A, Poh M, Laucirica D, McLean S, Hillas J, Garratt L, Larcombe A, Stick S, Kicic A. P151 Improved isolation yields for bacteriophage active against Staphylococcus aureus. J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)01177-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
10
|
Wannigama D, Kicic A, Hurst C, Monk P, Storer R, Chatsuwan T, Stick S, Cf A. FIGHTING PSEUDOMONAS AERUGINOSA AND NONTYPEABLE HAEMOPHILUS INFLUENZAE BIOFILMS WITH HOST DEFENCE PEPTIDE AS A NOVEL STEP FORWARD IN THE TREATMENT OF CHRONIC LUNG INFECTIONS. Chest 2019. [DOI: 10.1016/j.chest.2019.02.347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
11
|
Looi K, Buckley AG, Rigby PJ, Garratt LW, Iosifidis T, Zosky GR, Larcombe AN, Lannigan FJ, Ling KM, Martinovich KM, Kicic-Starcevich E, Shaw NC, Sutanto EN, Knight DA, Kicic A, Stick SM. Effects of human rhinovirus on epithelial barrier integrity and function in children with asthma. Clin Exp Allergy 2018; 48:513-524. [PMID: 29350877 DOI: 10.1111/cea.13097] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Revised: 11/13/2017] [Accepted: 11/21/2017] [Indexed: 11/29/2022]
Abstract
BACKGROUND Bronchial epithelial tight junctions (TJ) have been extensively assessed in healthy airway epithelium. However, no studies have yet assessed the effect of human rhinovirus (HRV) infection on the expression and resultant barrier function in epithelial tight junctions (TJ) in childhood asthma. OBJECTIVES To investigate the impact of HRV infection on airway epithelial TJ expression and barrier function in airway epithelial cells (AECs) of children with and without asthma. Furthermore, to test the hypothesis that barrier integrity and function is compromised to a greater extent by HRV in AECs from asthmatic children. METHODS Primary AECs were obtained from children with and without asthma, differentiated into air-liquid interface (ALI) cultures and infected with rhinovirus. Expression of claudin-1, occludin and zonula occluden-1 (ZO-1) was assessed via qPCR, immunocytochemistry (ICC), in-cell western (ICW) and confocal microscopy. Barrier function was assessed by transepithelial electrical resistance (TER; RT ) and permeability to fluorescent dextran. RESULTS Basal TJ gene expression of claudin-1 and occludin was significantly upregulated in asthmatic children compared to non-asthmatics; however, no difference was seen with ZO-1. Interestingly, claudin-1, occludin and ZO-1 protein expression was significantly reduced in AEC of asthmatic children compared to non-asthmatic controls suggesting possible post-transcriptional inherent differences. HRV infection resulted in a transient dissociation of TJ and airway barrier integrity in non-asthmatic children. Although similar dissociation of TJ was observed in asthmatic children, a significant and sustained reduction in TJ expression concurrent with both a significant decrease in TER and an increase in permeability in asthmatic children was observed. CONCLUSION This study demonstrates novel intrinsic differences in TJ gene and protein expression between AEC of children with and without asthma. Furthermore, it correlates directly the relationship between HRV infection and the resultant dissociation of epithelial TJ that causes a continued altered barrier function in children with asthma.
Collapse
Affiliation(s)
- K Looi
- School of Paediatrics and Child Health, University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia
| | - A G Buckley
- Centre for Microscopy, Characterisation and Analysis (CMCA), University of Western Australia, Crawley, WA, Australia
| | - P J Rigby
- Centre for Microscopy, Characterisation and Analysis (CMCA), University of Western Australia, Crawley, WA, Australia
| | - L W Garratt
- School of Paediatrics and Child Health, University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia
| | - T Iosifidis
- School of Paediatrics and Child Health, University of Western Australia, Nedlands, WA, Australia.,Centre for Cell Therapy and Regenerative Medicine, University of Western Australia, Nedlands, WA, Australia
| | - G R Zosky
- School of Medicine, Faculty of Health, University of Tasmania, Hohart, TAS, Australia
| | - A N Larcombe
- Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia.,Occupation and Environment, School of Public Health, Curtin University, Perth, WA, Australia
| | - F J Lannigan
- School of Paediatrics and Child Health, University of Western Australia, Nedlands, WA, Australia.,School of Medicine, Notre Dame University, Fremantle, WA, Australia
| | - K-M Ling
- Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia
| | - K M Martinovich
- Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia
| | - E Kicic-Starcevich
- Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia.,Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia
| | - N C Shaw
- Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia
| | - E N Sutanto
- Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia.,Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia
| | - D A Knight
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia.,Priority Research Centre for Asthma and Respiratory Disease, Hunter Medical Research Institute, Newcastle, NSW, Australia.,Department of Anaesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC, Canada
| | - A Kicic
- School of Paediatrics and Child Health, University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia.,Centre for Cell Therapy and Regenerative Medicine, University of Western Australia, Nedlands, WA, Australia.,Occupation and Environment, School of Public Health, Curtin University, Perth, WA, Australia.,Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia
| | - S M Stick
- School of Paediatrics and Child Health, University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, University of Western Australia, Subiaco, WA, Australia.,Centre for Cell Therapy and Regenerative Medicine, University of Western Australia, Nedlands, WA, Australia.,Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia
| |
Collapse
|
12
|
Garratt L, Looi K, Ling KM, Martinovich K, Falsafi R, Iosifidis T, Shaw N, Montgomery S, Kicic-Starcevich E, Sutanto E, Kicic A, Hancock R, Stick S. 33 CFTR modulators alter innate immune responses by primary airway epithelial cells challenged with rhinovirus. J Cyst Fibros 2017. [DOI: 10.1016/s1569-1993(17)30398-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
13
|
Kicic A, Stevens PT, Sutanto EN, Kicic-Starcevich E, Ling KM, Looi K, Martinovich KM, Garratt LW, Iosifidis T, Shaw NC, Buckley AG, Rigby PJ, Lannigan FJ, Knight DA, Stick SM. Impaired airway epithelial cell responses from children with asthma to rhinoviral infection. Clin Exp Allergy 2016; 46:1441-1455. [PMID: 27238549 DOI: 10.1111/cea.12767] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 05/21/2016] [Accepted: 05/25/2016] [Indexed: 12/01/2022]
Abstract
BACKGROUND The airway epithelium forms an effective immune and physical barrier that is essential for protecting the lung from potentially harmful inhaled stimuli including viruses. Human rhinovirus (HRV) infection is a known trigger of asthma exacerbations, although the mechanism by which this occurs is not fully understood. OBJECTIVE To explore the relationship between apoptotic, innate immune and inflammatory responses to HRV infection in airway epithelial cells (AECs) obtained from children with asthma and non-asthmatic controls. In addition, to test the hypothesis that aberrant repair of epithelium from asthmatics is further dysregulated by HRV infection. METHODS Airway epithelial brushings were obtained from 39 asthmatic and 36 non-asthmatic children. Primary cultures were established and exposed to HRV1b and HRV14. Virus receptor number, virus replication and progeny release were determined. Epithelial cell apoptosis, IFN-β production, inflammatory cytokine release and epithelial wound repair and proliferation were also measured. RESULTS Virus proliferation and release was greater in airway epithelial cells from asthmatics but this was not related to the number of virus receptors. In epithelial cells from asthmatic children, virus infection dampened apoptosis, reduced IFN-β production and increased inflammatory cytokine production. HRV1b infection also inhibited wound repair capacity of epithelial cells isolated from non-asthmatic children and exaggerated the defective repair response seen in epithelial cells from asthmatics. Addition of IFN-β restored apoptosis, suppressed virus replication and improved repair of airway epithelial cells from asthmatics but did not reduce inflammatory cytokine production. CONCLUSIONS Collectively, HRV infection delays repair and inhibits apoptotic processes in epithelial cells from non-asthmatic and asthmatic children. The delayed repair is further exaggerated in cells from asthmatic children and is only partially reversed by exogenous IFN-β.
Collapse
Affiliation(s)
- A Kicic
- Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia. .,School of Paediatrics and Child Health, The University of Western Australia, Nedlands, WA, Australia. .,Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia. .,Centre for Cell Therapy and Regenerative Medicine, School of Medicine and Pharmacology, The University of Western Australia and Harry Perkins Institute of Medical Research, Nedlands, WA, Australia.
| | - P T Stevens
- School of Paediatrics and Child Health, The University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - E N Sutanto
- Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia.,Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - E Kicic-Starcevich
- Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia.,Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - K-M Ling
- Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - K Looi
- Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - K M Martinovich
- Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - L W Garratt
- Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - T Iosifidis
- School of Paediatrics and Child Health, The University of Western Australia, Nedlands, WA, Australia.,Centre for Cell Therapy and Regenerative Medicine, School of Medicine and Pharmacology, The University of Western Australia and Harry Perkins Institute of Medical Research, Nedlands, WA, Australia
| | - N C Shaw
- Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia
| | - A G Buckley
- Centre of Microscopy, Characterisation and Analysis, The University of Western Australia, Nedlands, WA, Australia
| | - P J Rigby
- Centre of Microscopy, Characterisation and Analysis, The University of Western Australia, Nedlands, WA, Australia
| | - F J Lannigan
- School of Medicine, Notre Dame University, Fremantle, WA, Australia
| | - D A Knight
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia.,Priority Research Centre for Asthma and Respiratory Disease, Hunter Medical Research Institute, Newcastle, NSW, Australia.,Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia, Vancouver, BC, Canada
| | - S M Stick
- Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, WA, Australia.,School of Paediatrics and Child Health, The University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, Centre for Health Research, The University of Western Australia, Nedlands, WA, Australia.,Centre for Cell Therapy and Regenerative Medicine, School of Medicine and Pharmacology, The University of Western Australia and Harry Perkins Institute of Medical Research, Nedlands, WA, Australia
| |
Collapse
|
14
|
Bartel S, Schulz N, Schamberger A, Alessandrini F, Noessner E, Stick SM, Kicic A, Eickelberg O, Freishtat RJ, Krauss-Etschmann S. Airway epithelial cells secrete altered exosomal microRNAs in murine experimental and human paediatric asthma. Pneumologie 2016. [DOI: 10.1055/s-0036-1572294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
15
|
Bartel S, Schulz N, Schamberger AC, Alessandrini F, Pagel P, Theis FJ, Milger K, Noessner E, Stick SM, Kicic A, Eickelberg O, Freishtat RJ, Krauss-Etschmann S. SEC14-like 3 is decreased in airway ciliated cells in experimental and paediatric asthma. Pneumologie 2015. [DOI: 10.1055/s-0035-1548654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
16
|
Kicic A, Lavender M, Musk M, Wrobel J, Banerjee B, Ling K, Martinovich K, Garratt L, Iosifidis T, Looi K, Kicic-Starcevich E, Lannigan F, Hopkins P, Yerkovich S, Sutanto E, Chambers D, Stick S. Epithelial Injury and Dysregulated Repair in Small and Large Airways of Lung Transplant Patients is Ameliorated by Azithromycin. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
17
|
Hagner S, Welz H, Kicic A, Alrifai M, Marsh LM, Sutanto EN, Ling KM, Stick SM, Müller B, Weissmann N, Renz H. Suppression of adrenomedullin contributes to vascular leakage and altered epithelial repair during asthma. Allergy 2012; 67:998-1006. [PMID: 22686590 DOI: 10.1111/j.1398-9995.2012.02851.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2012] [Indexed: 12/25/2022]
Abstract
BACKGROUND The anti-inflammatory peptide, adrenomedullin (AM), and its cognate receptor are expressed in lung tissue, but its pathophysiological significance in airway inflammation is unknown. OBJECTIVES This study investigated whether allergen-induced airway inflammation involves an impaired local AM response. METHODS Airway AM expression was measured in acute and chronically sensitized mice following allergen inhalation and in airway epithelial cells of asthmatic and nonasthmatic patients. The effects of AM on experimental allergen-induced airway inflammation and of AM on lung epithelial repair in vitro were investigated. RESULTS Adrenomedullin mRNA levels were significantly (P < 0.05) reduced in acute ovalbumin (OVA)-sensitized mice after OVA challenge, by over 60% at 24 h and for up to 6 days. Similarly, reduced AM expression was observed in two models of chronic allergen-induced inflammation, OVA- and house dust mite-sensitized mice. The reduced AM expression was restricted to airway epithelial and endothelial cells, while AM expression in alveolar macrophages was unaltered. Intranasal AM completely attenuated the OVA-induced airway hyperresponsiveness and mucosal plasma leakage but had no effect on inflammatory cells or cytokines. The effects of inhaled AM were reversed by pre-inhalation of the putative AM receptor antagonist, AM ((22-52)) . AM mRNA levels were significantly (P < 0.05) lower in human asthmatic airway epithelial samples than in nonasthmatic controls. In vitro, AM dose-dependently (10(-11) -10(-7) M) accelerated experimental wound healing in human and mouse lung epithelial cell monolayers and stimulated epithelial cell migration. CONCLUSION Adrenomedullin suppression in T(H) 2-related inflammation is of pathophysiological significance and represents loss of a factor that maintains tissue integrity during inflammation.
Collapse
Affiliation(s)
- S. Hagner
- Institute of Laboratory Medicine; Medical Faculty - Philipps University of Marburg; Biomedical Research Center (BMFZ); Marburg; Germany
| | - H. Welz
- Institute of Laboratory Medicine; Medical Faculty - Philipps University of Marburg; Biomedical Research Center (BMFZ); Marburg; Germany
| | | | - M. Alrifai
- Institute of Laboratory Medicine; Medical Faculty - Philipps University of Marburg; Biomedical Research Center (BMFZ); Marburg; Germany
| | - L. M. Marsh
- Institute of Laboratory Medicine; Medical Faculty - Philipps University of Marburg; Biomedical Research Center (BMFZ); Marburg; Germany
| | | | - K.-M. Ling
- Telethon Institute for Child Health Research; Centre for Health Research; The University of Western Australia; Nedlands; WA; Australia
| | | | - B. Müller
- Laboratory of Respiratory Cell Biology; Department of Internal Medicine; Medical Faculty - Philipps University of Marburg; Marburg; Germany
| | - N. Weissmann
- University of Giessen Lung Center; Giessen; Germany
| | - H. Renz
- Institute of Laboratory Medicine; Medical Faculty - Philipps University of Marburg; Biomedical Research Center (BMFZ); Marburg; Germany
| |
Collapse
|
18
|
Hagner S, Welz H, Kicic A, Alrifai M, Marsh L, Sutanto EN, Ling KM, Stick SM, Müller B, Weissmann N, Renz H. Adrenomedullin - a protective factor in asthma? Pneumologie 2012. [DOI: 10.1055/s-0032-1315479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
19
|
Banerjee B, Musk M, Hopkins P, Stick S, Chambers D, Kicic A. 212 Direct Evidence of Chronic Epithelial Injury and Dysregulated Repair in the Lung Allograft. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
|
20
|
Banerjee B, Musk M, Yerkovich S, Hopkins P, Stick S, Kicic A, Chambers D. 342 Azithromycin Inhibits Mesenchymal Transition of Allograft Epithelium. J Heart Lung Transplant 2011. [DOI: 10.1016/j.healun.2011.01.349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
|
21
|
Banerjee B, Kicic A, Musk M, Stick S, Chambers D. 341: Explaining the Bronchiolitis Obliterans Syndrome (BOS) Phenotype – Epithelial-Mesenchymal Transition (EMT) Occurs More Readily in Small Airway Epithelium. J Heart Lung Transplant 2010. [DOI: 10.1016/j.healun.2009.11.354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
22
|
Hodge S, Holmes M, Banerjee B, Musk M, Kicic A, Waterer G, Reynolds PN, Hodge G, Chambers DC. Posttransplant bronchiolitis obliterans syndrome is associated with bronchial epithelial to mesenchymal transition. Am J Transplant 2009; 9:727-33. [PMID: 19344464 DOI: 10.1111/j.1600-6143.2009.02558.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Bronchiolitis obliterans syndrome (BOS) compromises lung transplant outcomes and is characterised by airway epithelial damage and fibrosis. The process whereby the normal epithelial configuration is replaced by fibroblastic scar tissue is poorly understood, but recent studies have implicated epithelial mesenchymal transition (EMT). The primary aim of this study was to assess the utility of flow cytometry in detecting and quantifying EMT in bronchial epithelial cells. Large airway brushings were obtained at 33 bronchoscopies in 16 BOS-free and 6 BOS grade 1-3 patients at 2-120 months posttransplant. Flow cytometry was used to assess expression of the mesenchymal markers alphaSMA, S100A4 and ED-A FN and HLA-DR. TGF beta 1 and HGF were measured in Bronchoalveolar lavage (BAL). Expression of all three mesenchymal markers was increased in BOS, as was HLA-DR. BAL HGF, but not TGF beta 1 was increased in BOS. Longitudinal investigation of one patient revealed a 100% increase in EMT markers concurrent with a 6-fold increase in BAL TGF beta 1 and the diagnosis of BOS at 17 months posttransplant. Flow cytometric evaluation of bronchial epithelium may provide a novel and rapid means to assess lung allografts at risk of BOS.
Collapse
Affiliation(s)
- S Hodge
- Lung Research Laboratory, Hanson Institute, Adelaide, Australia.
| | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Stevens PT, Kicic A, Sutanto EN, Knight DA, Stick SM. Dysregulated repair in asthmatic paediatric airway epithelial cells: the role of plasminogen activator inhibitor-1. Clin Exp Allergy 2009; 38:1901-10. [PMID: 19037965 DOI: 10.1111/j.1365-2222.2008.03093.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Asthma is associated with structural changes to airways such as extracellular matrix deposition and epithelial damage. Evidence suggests that asthmatic airway epithelial repair is abnormal and that elevated plasminogen activator inhibitor-1 levels observed in asthma may be involved in the epithelial repair process and in excessive matrix accumulation. OBJECTIVE To assess the ability of asthmatic airway epithelial cells (AECs) to repair mechanically induced wounds and to investigate the role that plasminogen activator inhibitor-1 plays in the repair process. METHODS AECs were isolated from atopic asthmatic and healthy non-atopic children by bronchial brushing, subcultured and wound repair experiments were performed. Plasminogen activator inhibitor-1 gene expression was assessed using real-time PCR while protein activity was measured in cell lysates as well as plasma. The role of plasminogen activator inhibitor-1 in epithelial proliferation and wound repair was investigated using siRNA. RESULTS Cells from asthmatic children have a significantly longer repair time in comparison with cells from otherwise healthy donors. Plasminogen activator inhibitor-1 mRNA expression was up-regulated 68-fold in freshly isolated asthmatic cells compared with normal cells, and protein levels were also significantly elevated in the asthmatic cell lysates, but plasma levels were similar in both groups. Plasminogen activator inhibitor-1 cells expression increased in both cohorts during culture. Gene silencing substantially reduced the rate of proliferation in asthmatic and healthy cells. Mechanical wounding of epithelial monolayers induced plasminogen activator inhibitor-1 expression in asthmatic and non-asthmatic cohorts, while gene silencing delayed wound repair of healthy cell, with minimal effect on those from asthmatics. CONCLUSION Asthmatic AECs are inherently dysfunctional in their ability to repair wounds; plasminogen activator inhibitor-1 mRNA and protein activity are constitutively up-regulated in asthmatic epithelium and play functional roles in both proliferation and repair of healthy cells. In asthmatic cells, elevated plasminogen activator inhibitors-1 levels fail to stimulate epithelial repair.
Collapse
Affiliation(s)
- P T Stevens
- School of Paediatrics and Child Health, The University of Western Australia, Nedlands, Western Australia, Australia
| | | | | | | | | |
Collapse
|
24
|
May L, Kicic A, Heel K, Banerjee B, Musk M, Hopkins P, Chambers D. 523: Cells of Epithelial Lineage Are Detectable in Peripheral Blood and Are Increased in Lung Transplantation. J Heart Lung Transplant 2009. [DOI: 10.1016/j.healun.2008.11.530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
25
|
Chambers D, Banerjee B, Hodge G, Hopkins P, Kicic A, Musk M, Stick S, Reynolds P, Holmes M, Hodge S. 521: Epithelial Mesenchymal Transition (EMT) in Bronchiolitis Obliterans Syndrome (BOS) Is Not Restricted to Small Airways. J Heart Lung Transplant 2009. [DOI: 10.1016/j.healun.2008.11.528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
26
|
McNamara PS, Kicic A, Sutanto EN, Stevens PT, Stick SM. Comparison of techniques for obtaining lower airway epithelial cells from children. Eur Respir J 2009; 32:763-8. [PMID: 18757700 DOI: 10.1183/09031936.00162507] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Airway epithelial cells (AECs) are important in asthma as they are the first cells to encounter pathogens/allergens. In children, AECs can be obtained using a "blind" nonbronchoscopic technique through an endotracheal tube. However, due to the increasing use of laryngeal masks the number of children in whom this technique is applicable has become limited. Recently, the present authors began to use a portable "bronchoscope-directed" technique to sample AECs. The current study compares both techniques in both asthmatic and nonasthmatic children. A total of 81 children undergoing elective surgery, were grouped according to atopic status and respiratory symptoms. Cellular yield of blind and bronchoscope-directed brushings were compared and immunocytochemistry performed. AECs were cultured and cytokine analysis of culture supernatant undertaken. Both techniques were equally well-tolerated, with the only adverse effect being a cough in 10% of the subjects. The mean+/-SD cell yield was higher in bronchoscope-directed than blind brushings (5.1+/-2.4 versus 3.1+/-1.4x10(6) cells). Immunocytochemistry confirmed an epithelial cell lineage. Culture supernatant cytokine concentrations were similar regardless of sampling technique with patterns preserved between asthmatic and healthy nonatopic phenotypes. Compared with blind brushing portable bronchoscope-directed brushing is well-tolerated, yields significantly more cells and is a potentially quick and useful technique for obtaining airway epithelial cells for research into childhood respiratory disease, specifically asthma.
Collapse
Affiliation(s)
- P S McNamara
- Institute of Child Health, Royal Liverpool Children's Hospital; Eaton Rd, Liverpool, L12 2AP, UK.
| | | | | | | | | |
Collapse
|
27
|
He JQ, Sandford AJ, Wang IM, Stepaniants S, Knight DA, Kicic A, Stick SM, Paré PD. Selection of housekeeping genes for real-time PCR in atopic human bronchial epithelial cells. Eur Respir J 2008; 32:755-62. [PMID: 18417509 DOI: 10.1183/09031936.00129107] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The stability of housekeeping genes (HKGs) is critical when performing real-time quantitative PCR. To date, the stability of common HKGs has not been systematically compared in human airway epithelial cells (AEC) in normal and atopic subjects. Expression levels of 12 HKGs were measured in AECs from a cohort of 30 healthy atopic nonasthmatic or atopic asthmatic children. Gene expression stability was determined using three different Visual Basic for Applications applets (geNorm, NormFinder and BestKeeper). All 12 HKGs were expressed in AECs. However, the hypoxanthine ribosyltransferase and TATA-binding protein genes were excluded from further analysis due to low expression levels. The cyclophilin A gene was ranked the most stable by all three methods. The expression levels of the beta-actin and glyceraldehyde-3-phosphate dehydrogenase genes were significantly different between the three groups of patients, with atopic asthmatics showing the highest expression levels for both genes. The results suggest that the cyclophilin A gene is the most suitable housekeeping gene analysed for expression studies utilising uncultured bronchial airway epithelial cells from healthy and asthmatic children, and highlight the importance of validating housekeeping genes for each experimental model.
Collapse
Affiliation(s)
- J-Q He
- UBC James Hogg iCAPTURE Centre for Cardiovascular and Pulmonary Research, St Paul's Hospital, 1081 Burrard Street, Vancouver, BC, V6Z 1Y6, Canada.
| | | | | | | | | | | | | | | |
Collapse
|
28
|
May L, Banerjee B, Saxena A, Crook M, Charles A, Kicic A, O’Reilly J, Ravine D, Stick S, Musk M, Chambers D. 326: Circulating Stem Cells Engraft the Bronchial Epithelium in Humans after Lung Transplantation. J Heart Lung Transplant 2008. [DOI: 10.1016/j.healun.2007.11.336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
29
|
Moeller A, Horak F, Lane C, Knight D, Kicic A, Brennan S, Franklin P, Terpolilli J, Wildhaber JH, Stick SM. Inducible NO synthase expression is low in airway epithelium from young children with cystic fibrosis. Thorax 2006; 61:514-20. [PMID: 16517573 PMCID: PMC2111217 DOI: 10.1136/thx.2005.054643] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND This is the first study to measure inducible nitric oxide synthase (iNOS) gene and protein expression quantitatively in primary epithelial cells from very young children with cystic fibrosis (CF). Low levels of exhaled nitric oxide (NO) in CF suggest dysregulation of NO production in the airway. Due to the importance of NO in cell homeostasis and innate immunity, any defect in the pathway associated with CF would be a potential target for treatment. METHODS Cells were obtained by tracheobronchial brushing from 40 children with CF of mean (SD) age 2.1 (1.5) years and from 12 healthy non-atopic children aged 3.4 (1.2) years. Expression of iNOS mRNA was measured using quantitative PCR and iNOS protein by immunofluorescence and Western blot analysis. RESULTS Inducible NOS mRNA expression was significantly lower in CF patients with and without bacterial infection than in healthy children (0.22 and 0.23 v 0.76; p=0.002 and p=0.01, respectively). Low levels of iNOS gene expression were accompanied by low levels of iNOS protein expression as detected by Western blot analysis. CONCLUSIONS These results support the findings of previous studies in adult patients with advanced disease, cell lines, and animal models. Our findings reflect the situation in children with mild lung disease. They indicate that low iNOS expression may be an innate defect in CF with potential consequences for local antimicrobial defence and epithelial cell function and provide evidence for an approach to treatment based on increasing epithelial NO production or the sensitivity of NO dependent cellular processes.
Collapse
Affiliation(s)
- A Moeller
- Department of Respiratory Medicine, Princess Margaret Hospital for Children, Perth, Western Australia, and Division of Respiratory Medicine, University Children's Hospital Zurich, Switzerland.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Abstract
BACKGROUND The siderophore desferrioxamine mesylate (DFO) is used routinely in clinical practice to treat diseases of iron (Fe) overload. Recent studies suggest that DFO and other chelators may have potential in the treatment of cancer. The current study reports the findings obtained when a number of chelators with varying membrane permeability, Fe-binding affinity, and preference for either Fe(3+) or Fe(2+) were assessed for their antineoplastic potential in vitro against hepatocellular carcinoma cells (HCC) because to the authors' knowledge there are few effective treatment methods for this aggressive neoplasm. METHODS A number of criteria were investigated, including the effects of the chelators on cell proliferation, selectivity, Fe uptake, toxicity, and cell cycle progression. RESULTS The results obtained showed that Fe binding affinity did appear to influence Fe chelator activity but was not an absolute factor, and that certain ferric and ferrous, membrane-permeable and membrane-impermeable Fe chelators demonstrated antiproliferative activity and selectivity against HCC. All effective chelators inhibited Fe uptake from Tf-(59)Fe in both hepatoma cells and normal hepatocytes. However, these chelators all had much lower effects on the survival of normal proliferating and nonproliferating cells. The effects on cell cycle were more varied between chelators, as were levels of toxicity. CONCLUSIONS The results of the current study indicate that a number of different Fe chelators have the potential to treat HCC, and that further investigation into their mechanisms of action is warranted.
Collapse
Affiliation(s)
- A Kicic
- Department of Physiology, University of Western Australia, Crawley, Western Australia, Australia
| | | | | |
Collapse
|
31
|
Affiliation(s)
- A Kicic
- Stem Cell Unit, Lions Eye Institute, Nedlands, Western Australia, Australia
| | | | | |
Collapse
|
32
|
Kicic A, Chua AC, Baker E. The desferrithiocin (DFT) class of iron chelators: potential as antineoplastic agents. Anticancer Drug Des 2001; 16:195-207. [PMID: 12049478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Iron (Fe) is essential for the proliferation of cancer cells. A subgroup of the orthosubstituted phenolate class of Fe chelators, desferrithiocin [2-(3'-hydroxypyrid-2'-yl)4-methyl-delta2-thiazoline-4(S)-carboxylic acid; DFT] and its analogues, have potential application in short-term chemotherapy for cancer by Fe deprivation. Their effects on cell proliferation, cell cycle progression, Fe uptake and toxicity were therefore examined in adult and fetal rat and human hepatocellular carcinoma (HCC) cell lines, as well as in normal cells. DFT was more active than desferrioxamine, in clinical trials as an antineoplastic agent, consistently inhibiting cell proliferation in all cell lines (IC50 = 40 microM). 2-(2'-hydroxyphenyl-2'-yl)-delta2-thiazoline-4(S)-carboxylic acid was the most active analogue (IC50 = 55-90 microM). Inhibition was affected by chelator concentration and ability to prevent Fe uptake. The fetal-cell-derived HCC was more susceptible than adult HCC. Structure-activity studies revealed that thiazol methyl deletion greatly diminished antiproliferative activity of the chelators but stereochemical orientation of COOH around C4 had no effect. Removal of the N from the pyridine ring restored antiproliferative activity. Chelators inhibited DNA synthesis in the S phase. The chelators at their IC50 concentration had little or no effect on Fe uptake in normal cells. This apparent selectivity of these chelators for cancer cells, coupled with their high activity, suggests that further investigation is warranted.
Collapse
Affiliation(s)
- A Kicic
- Department of Physiology, University of Western Australia, Nedlands, Australia
| | | | | |
Collapse
|