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Sano A, Kozuka T, Watatani N, Kunita Y, Kawabata Y, Gose K, Shirahase K, Yoshikawa K, Yamazaki R, Nishikawa Y, Omori T, Nishiyama O, Iwanaga T, Sano H, Haraguchi R, Tohda Y, Matsumoto H. Role of bronchial hyperresponsiveness in patients with obstructive sleep apnea with asthma-like symptoms. Allergol Int 2024; 73:231-235. [PMID: 37951731 DOI: 10.1016/j.alit.2023.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/26/2023] [Accepted: 10/15/2023] [Indexed: 11/14/2023] Open
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is one of the major co-morbidities and aggravating factors of asthma. In OSA-complicated asthma, obesity, visceral fat, and systemic inflammation are associated with its severity, but the role of bronchial hyperresponsiveness (BHR) is unclear. We investigated the involvement of BHR and mediastinal fat width, as a measure of visceral fat, with OSA severity in patients with OSA and asthma-like symptoms. METHODS Patients with OSA who underwent BHR test and chest computed tomography scan for asthma-like symptoms were retrospectively enrolled. We evaluated the relationship between apnea-hypopnea index (AHI) and PC20 or anterior mediastinal fat width, stratified by the presence or absence of BHR. RESULTS OSA patients with BHR (n = 29) showed more obstructive airways and frequent low arousal threshold and lower mediastinal fat width, and tended to show fewer AHI than those without BHR (n = 25). In the overall analysis, mediastinal fat width was significantly positively correlated with AHI, which was significant even after adjustment with age and gender. This was especially significant in patients without BHR, while in OSA patients with BHR, there were significant negative associations between apnea index and airflow limitation, and hypopnea index and PC20. CONCLUSIONS Risk factors for greater AHI differed depending on the presence or absence of BHR in OSA patients with asthma-like symptoms. In the presence of BHR, severity of asthma may determine the severity of concomitant OSA.
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Affiliation(s)
- Akiko Sano
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Takenori Kozuka
- Department of Radiology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Nanase Watatani
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Yuuki Kunita
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Yoshiyuki Kawabata
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Kyuya Gose
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Ken Shirahase
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Kazuya Yoshikawa
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Ryo Yamazaki
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Yusaku Nishikawa
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Takashi Omori
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Osamu Nishiyama
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Takashi Iwanaga
- Center for General Medical Education and Clinical Training, Kindai University Hospital, Osaka, Japan
| | - Hiroyuki Sano
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Ryuta Haraguchi
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan
| | - Yuji Tohda
- Kindai University Hospital, Osaka, Japan
| | - Hisako Matsumoto
- Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan.
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Chu SJ, Liao WI, Pao HP, Wu SY, Tang SE. Targeting Rev-Erbα to protect against ischemia-reperfusion-induced acute lung injury in rats. Respir Res 2023; 24:247. [PMID: 37828537 PMCID: PMC10571317 DOI: 10.1186/s12931-023-02547-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 09/22/2023] [Indexed: 10/14/2023] Open
Abstract
BACKGROUND The dysregulation of local circadian clock has been implicated in the pathogenesis of a broad spectrum of diseases. However, the pathophysiological role of intrinsic circadian clocks Rev-Erbα in ischemia-reperfusion (IR)-induced acute lung injury (ALI) remains unclear. METHODS The IR-ALI model was established by subjecting isolated perfused rat lungs to 40 min of ischemia followed by 60 min of reperfusion. Rats were randomly assigned to one of six groups: control, control + SR9009 (Rev-Erbα agonist, 50 mg/kg), IR, and IR + SR9009 at one of three dosages (12.5, 25, 50 mg/kg). Bronchoalveolar lavage fluids (BALF) and lung tissues were obtained and analyzed. In vitro experiments utilized mouse lung epithelial cells (MLE-12) exposed to hypoxia-reoxygenation (HR) and pretreated with SR9009 (10 µM/L) and Rev-Erbα siRNA. RESULTS SR9009 exhibited a dose-dependent reduction in lung edema in IR-ALI. It significantly inhibited the production of TNF-α, IL-6, and CINC-1 in BALF. Moreover, SR9009 treatment restored suppressed IκB-α levels and reduced nuclear NF-κB p65 levels in lung tissues. In addition, a SR9009 mitigated IR-induced apoptosis and mitogen-activated protein kinase (MAPK) activation in injured lung tissue. Finally, treatment with Rev-Erbα antagonist SR8278 abolished the protective action of SR9009. In vitro analyses showed that SR9009 attenuated NF-κB activation and KC/CXCL-1 levels in MLE-12 cells exposed to HR, and these effects were significantly abrogated by Rev-Erbα siRNA. CONCLUSIONS The findings suggest that SR9009 exerts protective effects against IR-ALI in a Rev-Erbα-dependent manner. SR9009 may provide a novel adjuvant therapeutic approach for IR-ALI.
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Affiliation(s)
- Shi-Jye Chu
- Division of Rheumatology, Immunology, and Allergy, Department of Internal Medicine, Tri- Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Wen-I Liao
- Department of Emergency Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Hsin-Ping Pao
- Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan
| | - Shu-Yu Wu
- Institute of Aerospace and Undersea Medicine, National Defense Medical Center, Taipei, Taiwan
| | - Shih-En Tang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Tri- Service General Hospital, National Defense Medical Center, No. 325, Section 2, Chenggong Road, Neihu, Taipei114, Taiwan.
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Bartman CM, Stelzig KE, Linden DR, Prakash YS, Chiarella SE. Passive siRNA transfection method for gene knockdown in air-liquid interface airway epithelial cell cultures. Am J Physiol Lung Cell Mol Physiol 2021; 321:L280-L286. [PMID: 34037474 DOI: 10.1152/ajplung.00122.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Differentiation of human bronchial epithelial cells (HBEs) in air-liquid interface (ALI) cultures recapitulates organotypic modeling of the in vivo environment. Although ALI cultures are invaluable for studying the respiratory epithelial barrier, loss-of-function studies are limited by potentially cytotoxic reagents in classical transfection methods, the length of the differentiation protocol, and the number of primary epithelial cell passages. Here, we present the efficacy and use of a simple method for small interfering RNA (siRNA) transfection of normal HBEs (NHBEs) in ALI cultures that does not require potentially cytotoxic transfection reagents and does not detrimentally alter the physiology or morphology of NHBEs during the differentiation process. This transfection protocol introduces a reproducible and efficient method for loss-of-function studies in HBE ALI cultures that can be leveraged for modeling the respiratory system and airway diseases.
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Affiliation(s)
- Colleen M Bartman
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
| | - Kimberly E Stelzig
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota
| | - David R Linden
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
| | - Y S Prakash
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota.,Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota
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