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Gabryelska A, Turkiewicz S, Karuga FF, Sochal M, Strzelecki D, Białasiewicz P. Disruption of Circadian Rhythm Genes in Obstructive Sleep Apnea Patients-Possible Mechanisms Involved and Clinical Implication. Int J Mol Sci 2022; 23:ijms23020709. [PMID: 35054894 PMCID: PMC8775490 DOI: 10.3390/ijms23020709] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/29/2021] [Accepted: 01/05/2022] [Indexed: 02/06/2023] Open
Abstract
Obstructive sleep apnea (OSA) is a chronic condition characterized by recurrent pauses in breathing caused by the collapse of the upper airways, which results in intermittent hypoxia and arousals during the night. The disorder is associated with a vast number of comorbidities affecting different systems, including cardiovascular, metabolic, psychiatric, and neurological complications. Due to abnormal sleep architecture, OSA patients are at high risk of circadian clock disruption, as has been reported in several recent studies. The circadian clock affects almost all daily behavioral patterns, as well as a plethora of physiological processes, and might be one of the key factors contributing to OSA complications. An intricate interaction between the circadian clock and hypoxia may further affect these processes, which has a strong foundation on the molecular level. Recent studies revealed an interaction between hypoxia-inducible factor 1 (HIF-1), a key regulator of oxygen metabolism, and elements of circadian clocks. This relationship has a strong base in the structure of involved elements, as HIF-1 as well as PER, CLOCK, and BMAL, belong to the same Per-Arnt-Sim domain family. Therefore, this review summarizes the available knowledge on the molecular mechanism of circadian clock disruption and its influence on the development and progression of OSA comorbidities.
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Affiliation(s)
- Agata Gabryelska
- Department of Sleep Medicine and Metabolic Disorders, Medical University of Lodz, 92-215 Lodz, Poland; (S.T.); (F.F.K.); (M.S.); (P.B.)
- Correspondence: ; Tel.: +48-660796004
| | - Szymon Turkiewicz
- Department of Sleep Medicine and Metabolic Disorders, Medical University of Lodz, 92-215 Lodz, Poland; (S.T.); (F.F.K.); (M.S.); (P.B.)
| | - Filip Franciszek Karuga
- Department of Sleep Medicine and Metabolic Disorders, Medical University of Lodz, 92-215 Lodz, Poland; (S.T.); (F.F.K.); (M.S.); (P.B.)
| | - Marcin Sochal
- Department of Sleep Medicine and Metabolic Disorders, Medical University of Lodz, 92-215 Lodz, Poland; (S.T.); (F.F.K.); (M.S.); (P.B.)
| | - Dominik Strzelecki
- Department of Affective and Psychotic Disorders, Medical University of Lodz, 92-215 Lodz, Poland;
| | - Piotr Białasiewicz
- Department of Sleep Medicine and Metabolic Disorders, Medical University of Lodz, 92-215 Lodz, Poland; (S.T.); (F.F.K.); (M.S.); (P.B.)
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Endothelin-1 and LOX-1 as Markers of Endothelial Dysfunction in Obstructive Sleep Apnea Patients. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18031319. [PMID: 33535693 PMCID: PMC7908073 DOI: 10.3390/ijerph18031319] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/20/2021] [Accepted: 01/28/2021] [Indexed: 12/15/2022]
Abstract
INTRODUCTION The search of biochemical markers of endothelial dysfunction: lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1)-involved in atherosclerotic plaques formation-and endothelin-1 (ET-1)-potent vasoconstrictor-might help in detecting obstructive sleep apnea (OSA) patients at high risk of cardiovascular diseases. MATERIAL AND METHODS In 71 OSA patients (apnoea/hypopnoea index, AHI 28.2 ± 17.9/hour) and in 21 healthy controls the serum levels of LOX-1 and ET-1 were measured. RESULTS There were increased levels of ET-1 (1.58 ± 0.65 vs. 1.09 ± 0.38 pg/mL; p < 0.001) but not of LOX-1 in OSA patients as compared with healthy controls. In the patients' group ET-1 levels negatively correlated with serum LDL levels. LOX-1 levels positively correlated with fasting glucose levels and were higher in the patients with than without diabetes. Neither ET-1 nor LOX-1 correlated with OSA severity. In mild OSA patients, there was a negative correlation between LOX-1 and mean arterial oxygen saturation during sleep. In severe OSA patients, there was a positive correlation between LOX-1 levels and uric acid. CONCLUSION There is endothelial dysfunction in OSA patients as indicated by increased serum levels of ET-1 and possibly endothelial dysfunction in diabetic OSA patients as indicated by increased serum levels of LOX-1 and its correlation with fasting glucose levels.
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Zhang Z, Li Z, Wang Y, Wei L, Chen H. Overexpressed long noncoding RNA CPS1‐IT alleviates pulmonary arterial hypertension in obstructive sleep apnea by reducing interleukin‐1β expression via HIF1 transcriptional activity. J Cell Physiol 2019; 234:19715-19727. [PMID: 30982984 DOI: 10.1002/jcp.28571] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Revised: 03/05/2019] [Accepted: 03/14/2019] [Indexed: 01/07/2023]
Affiliation(s)
- Zeming Zhang
- Department of Respiratory Medicine Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital Shanghai China
| | - Zheng Li
- Department of Respiratory Medicine Affiliated Hospital, Hebei University Baoding China
| | - Yancun Wang
- Department of Neurology Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital Shanghai China
| | - Li Wei
- Department of Respiratory Medicine Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital Shanghai China
| | - Hao Chen
- Department of Respiratory Medicine Shanghai University of Medicine & Health Sciences Affiliated Zhoupu Hospital Shanghai China
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Chen IC, Lin YT, Huang JS, Wu BN, Hsu JH, Tan MS, Dai ZK. Decreased Ambient Oxygen Tension Alters the Expression of Endothelin-1, iNOS and cGMP in Rat Alveolar Macrophages. Int J Med Sci 2019; 16:443-449. [PMID: 30911278 PMCID: PMC6428981 DOI: 10.7150/ijms.28353] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 12/28/2018] [Indexed: 01/20/2023] Open
Abstract
Background: Hypoxia plays an important role in the vascular tone of pulmonary circulation via the vasculature and parenchymal tissue. Endothelin-1 (ET-1), a potent vasoconstrictive peptide, plays a role in inflammation in mononuclear cells. Nitric oxide synthase (NOS), which generates nitric oxide (NO)/cyclic 3', 5'-monophosphate (cGMP), is coexpressed with ET-1 in many cell types. The aim of this study was to assess whether hypoxia induces the production of ET-1 and associated expression of NOS, NO/cGMP and chemokines in rat alveolar macrophages (AMs). Methods: NR8383 cells were cultured under hypoxic (1% oxygen) conditions for 0, 2, 4, 8 and 12 hours. Levels of ET-1, inducible NOS (iNOS), phosphorylated iNOS (p-iNOS), nitrite/nitrate (NOx), cGMP and monocyte chemoattractant protein-1 (MCP-1) were measured. Results: ET-1, p-iNOS, NOx, and cGMP increased significantly in AMs after 4 hours of hypoxia (p < 0.05). ET-1 and MCP-1 mRNA increased after 8 hours (p < 0.05). The protein expression of ET-1, MCP-1, and p-iNOS increased in a time-dependent manner, while iNOS expression decreased with time. Conclusions: The changes in ET-1, p-iNOS, and the NO/cGMP pathway in AMs may help elucidate the mechanisms in the hypoxic lung. Understanding changes in the endothelin axis in hypoxic AMs is a crucial first step to unravel its role in pulmonary circulation.
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Affiliation(s)
- I-Chen Chen
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Department of Pediatrics, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yu-Tsai Lin
- Department of Otolaryngology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Jhy-Shrian Huang
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Bin-Nan Wu
- Department of Pharmacology, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jong-Hau Hsu
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Department of Pediatrics, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Mian-Shin Tan
- Department of Biomedical Science and Environmental Biology, College of Life Sciences, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Zen-Kong Dai
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Department of Pediatrics, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Does Pediatric Obstructive Sleep Apnea Syndrome Cause Systemic Microvascular Dysfunction? J Craniofac Surg 2018; 29:e381-e384. [DOI: 10.1097/scs.0000000000004388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Systems Biology Genetic Approach Identifies Serotonin Pathway as a Possible Target for Obstructive Sleep Apnea: Results from a Literature Search Review. SLEEP DISORDERS 2017; 2017:6768323. [PMID: 29057124 PMCID: PMC5625807 DOI: 10.1155/2017/6768323] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 06/14/2017] [Indexed: 12/25/2022]
Abstract
Rationale Overall validity of existing genetic biomarkers in the diagnosis of obstructive sleep apnea (OSA) remains unclear. The objective of this systematic genetic study is to identify “novel” biomarkers for OSA using systems biology approach. Methods Candidate genes for OSA were extracted from PubMed, MEDLINE, and Embase search engines and DisGeNET database. The gene ontology (GO) analyses and candidate genes prioritization were performed using Enrichr tool. Genes pertaining to the top 10 pathways were extracted and used for Ingenuity Pathway Analysis. Results In total, we have identified 153 genes. The top 10 pathways associated with OSA include (i) serotonin receptor interaction, (ii) pathways in cancer, (iii) AGE-RAGE signaling in diabetes, (iv) infectious diseases, (v) serotonergic synapse, (vi) inflammatory bowel disease, (vii) HIF-1 signaling pathway, (viii) PI3-AKT signaling pathway, (ix) regulation lipolysis in adipocytes, and (x) rheumatoid arthritis. After removing the overlapping genes, we have identified 23 candidate genes, out of which >30% of the genes were related to the genes involved in the serotonin pathway. Among these 4 serotonin receptors SLC6A4, HTR2C, HTR2A, and HTR1B were strongly associated with OSA. Conclusions This preliminary report identifies several potential candidate genes associated with OSA and also describes the possible regulatory mechanisms.
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Targeting the ROS-HIF-1-endothelin axis as a therapeutic approach for the treatment of obstructive sleep apnea-related cardiovascular complications. Pharmacol Ther 2016; 168:1-11. [PMID: 27492897 DOI: 10.1016/j.pharmthera.2016.07.010] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 07/08/2016] [Indexed: 12/12/2022]
Abstract
Obstructive sleep apnea (OSA) is now recognized as an independent and important risk factor for cardiovascular diseases such as hypertension, coronary heart disease, heart failure and stroke. Clinical and experimental data have confirmed that intermittent hypoxia is a major contributor to these deleterious consequences. The repetitive occurrence of hypoxia-reoxygenation sequences generates significant amounts of free radicals, particularly in moderate to severe OSA patients. Moreover, in addition to hypoxia, reactive oxygen species (ROS) are potential inducers of the hypoxia inducible transcription factor-1 (HIF-1) that promotes the transcription of numerous adaptive genes some of which being deleterious for the cardiovascular system, such as the endothelin-1 gene. This review will focus on the involvement of the ROS-HIF-1-endothelin signaling pathway in OSA and intermittent hypoxia and discuss current and potential therapeutic approaches targeting this pathway to treat or prevent cardiovascular disease in moderate to severe OSA patients.
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Lombardi C, Musicco E, Bettoncelli G, Milanese M, Senna G, Braido F, Canonica GW. The perception of Obstructive Sleep Apnoea/Hypopnoea Syndrome (OSAHS) among Italian general practitioners. Clin Mol Allergy 2015; 13:4. [PMID: 25878560 PMCID: PMC4397682 DOI: 10.1186/s12948-015-0009-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 02/26/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Obstructive Sleep Apnoea/Hypopnoea Syndrome (OSAHS) is a common disorder in the general population but often underestimated and underdiagnosed. METHODS This questionnaire-based study evaluated the overall level of knowledge about OSAHS among Italian General Practitioners (GPs), who are frequently involved in the management of this complex disease. This represents an interesting aspect, because GPs intercept many of the patients with OSAHS, in which C-PAP could be potentially indicated. Randomly-selected GPs were provided with questionnaires, which were then returned anonymously. RESULTS 80 questionnaires have been validated; the participants in the sample examined were represented by 43 females and 37 males; the average age of participants was 51 years. The general knowledge on OSAHS is overall satisfactory among GPs; it is recognized by most of the GPs interviewed as pathology in constant increase, and associated with predisposing factors such as obesity. High blood pressure is perceived as an independent cardiovascular risk factor in patients with OSAHS, in line with the majority of international studies. The C-PAP has been identified as the care gold standard in patients with OSAHS, despite the lack of patient compliance in relation to this procedure, while polysomnography was found to be the main instrumental procedure used in the diagnostic workup of OSAS. The pulmonologist and a multidisciplinary team have been identified as the specialist figures of reference to which to direct the patient through the diagnostic workup. Respiratory therapists and nurses represent the role of educator in the proper management of the C-PAP in the opinion of 62% of respondents, while only 34% think that this role should be played by the GPs and/or other specialists. CONCLUSIONS In conclusion, this survey about the perception of OSAHS among GPs in Italy highlighted a satisfactory overall knowledge of OSAHS and only few weak points.
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Affiliation(s)
- Carlo Lombardi
- />Allergy and Pneumology Departmental Unit, Fondazione Poliambulanza Hospital, Brescia, Italy
| | - Eleonora Musicco
- />Allergy and Pneumology Departmental Unit, Fondazione Poliambulanza Hospital, Brescia, Italy
| | - Germano Bettoncelli
- />General Practitioner, SIMG (Società Italiana di Medicina Generale), Brescia, Italy
| | - Manlio Milanese
- />Division of Pulmunology, S. Corona Hospital, Pietra Ligure, Italy
| | | | - Fulvio Braido
- />Allergy and Respiratory Diseases, DIMI, University of Genoa, Genoa, Italy
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Oldenburg O, Arzt M, Bitter T, Bonnemeier H, Edelmann F, Fietze I, Podszus T, Schäfer T, Schöbel C, Skobel E, Skowasch D, Penzel T, Nienaber C. Positionspapier „Schlafmedizin in der Kardiologie“. KARDIOLOGE 2015. [DOI: 10.1007/s12181-015-0654-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Shujaat A, Bellardini J, Girdhar A, Bajwa AA. Use of pulmonary arterial hypertension-specific therapy in overweight or obese patients with obstructive sleep apnea and pulmonary hypertension. Pulm Circ 2014; 4:244-9. [PMID: 25006443 DOI: 10.1086/675987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 01/07/2014] [Indexed: 11/03/2022] Open
Abstract
Pulmonary hypertension (PH) in overweight or obese patients with obstructive sleep apnea (OSA) may be multifactorial. The effect of pulmonary artery hypertension (PAH)-specific drugs on PH and exercise capacity in such patients is unknown. We performed a retrospective review of overweight or obese patients with OSA and PH who were treated with PAH-specific therapy in our PH clinic. We identified 9 female and 2 male patients. The mean age ± SD was 54.9 ± 9.3 years. The mean pulmonary artery pressure at the time of diagnosis of PH was 39.8 ± 16.1 mmHg. The right atrial pressure was 11.1 ± 4.5 mmHg, the pulmonary artery wedge pressure was 14.1 ± 2.9 mmHg, the cardiac index was 2.6 ± 0.5 L/min/m(2), and the pulmonary vascular resistance index was 10.6 ± 7.1 Wood units/m(2). The indications for use of PAH-specific therapy were dyspnea in association with right heart failure (n = 4), persistent PH despite compliance with nocturnal positive airway pressure (PAP) therapy (n = 4), or inability to tolerate PAP therapy (n = 3). PH was treated with an endothelin receptor antagonist (n = 8) or a phosphodiesterase-5 inhibitor (n = 3). The 6-minute walk distance (6MWD) improved significantly, from 234 ± 49.7 to 258 ± 54.6 m (24 m [95% confidence interval (CI): 6.5-341.5 m]; P = 0.014) over a period of 4.4 ± 1.8 months (n = 8) and from 241.7 ± 48.5 to 289.9 ± 91 m (48 m [95% CI: 5.5-90.8 m]; P = 0.033) in those with a longer follow-up period of 12.1 ± 6.4 months (n = 7). The systolic pulmonary artery pressure dropped significantly, from 64 ± 25.2 to 42 ± 10.4 mmHg (22 mmHg [95% CI: 4-40 mmHg]; P = 0.024) over a period of 6.1 ± 4.1 months (n = 7). In conclusion, PAH-specific therapy resulted in significant improvement in both PH and 6MWD.
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Affiliation(s)
- Adil Shujaat
- Division of Pulmonary, Critical Care and Sleep Medicine, University of Florida, Jacksonville, Florida, USA
| | - Jason Bellardini
- Department of Medicine, University of Florida, Jacksonville, Florida, USA
| | - Ankur Girdhar
- Division of Pulmonary, Critical Care and Sleep Medicine, University of Florida, Jacksonville, Florida, USA
| | - Abubakr A Bajwa
- Division of Pulmonary, Critical Care and Sleep Medicine, University of Florida, Jacksonville, Florida, USA
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Thomas JJ, Ren J. Obstructive sleep apnoea and cardiovascular complications: perception versus knowledge. Clin Exp Pharmacol Physiol 2014; 39:995-1003. [PMID: 23082844 DOI: 10.1111/1440-1681.12024] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 10/13/2012] [Accepted: 10/15/2012] [Indexed: 01/02/2023]
Abstract
Epidemiological evidence has confirmed that obstructive sleep apnoea (OSA) significantly promotes cardiovascular risk, independent of age, sex, race and other common risk factors for cardiovascular diseases, such as smoking, drinking, obesity, diabetes mellitus, dyslipidaemia and hypertension. Patients with severe OSA exhibit a higher prevalence of coronary artery disease, heart failure and stroke. Despite the tight correlation between sleep apnoea and these comorbidities, the mechanisms behind increased cardiovascular risk in OSA remain elusive. Several theories have been postulated, including sympathetic activation, endothelial dysfunction, oxidative stress and inflammation. The association between OSA and cardiovascular diseases may be rather complicated and compounded by the presence of components of metabolic syndrome, such as obesity, hypertension, diabetes mellitus and dyslipidaemia. The present minireview updates current knowledge with regard to the cardiovascular sequelae of OSA and the mechanisms involved.
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Affiliation(s)
- Joi J Thomas
- Division of Kinesiology and Health & Biomedical Science, University of Wyoming College of Health Sciences, Laramie, WY, USA
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Impact of sleep respiratory disorders on endothelial function in children. ScientificWorldJournal 2013; 2013:719456. [PMID: 24453895 PMCID: PMC3888735 DOI: 10.1155/2013/719456] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 10/09/2013] [Indexed: 12/17/2022] Open
Abstract
Obstructive sleep apnea syndrome (OSAS) in children can induce endothelial dysfunction, a well-known early marker of atherosclerosis. The study aimed to evaluate a link among endothelial function (measured by flow-mediated vasodilation (FMD)), obesity (evaluated by body mass index (BMI)), and sleep disordered breathing (SDB), assessed with apnoea/hypopnoea index (AHI), in a paediatric population. We demonstrated that our little OSAS patients showed an impaired endothelial function as compared to controls. In particular, the higher the AHI, the worst the FMD values and thus the endothelial function. Although the population sample is small, this study demonstrated that OSAS could impair endothelial function and worsen cardiovascular risk profile since childhood.
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Tual-Chalot S, Gagnadoux F, Trzepizur W, Priou P, Andriantsitohaina R, Martinez MC. Circulating microparticles from obstructive sleep apnea syndrome patients induce endothelin-mediated angiogenesis. Biochim Biophys Acta Mol Basis Dis 2013; 1842:202-7. [PMID: 24275556 DOI: 10.1016/j.bbadis.2013.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 10/31/2013] [Accepted: 11/15/2013] [Indexed: 10/26/2022]
Abstract
Microparticles are deemed true biomarkers and vectors of biological information between cells. Depending on their origin, the composition of microparticles varies and the subsequent message transported by them, such as proteins, mRNA, or miRNA, can differ. In obstructive sleep apnea syndrome (OSAS), circulating microparticles are associated with endothelial dysfunction by reducing endothelial-derived nitric oxide production. Here, we have analyzed the potential role of circulating microparticles from OSAS patients on the regulation of angiogenesis and the involved pathway. VEGF content carried by circulating microparticles from OSAS patients was increased when compared with microparticles from non-OSAS patients. Circulating microparticles from OSAS patients induced an increase of angiogenesis that was abolished in the presence of the antagonist of endothelin-1 receptor type B. In addition, endothelin-1 secretion was increased in human endothelial cells treated by OSAS microparticles. We highlight that circulating microparticles from OSAS patients can modify the secretome of endothelial cells leading to angiogenesis.
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Affiliation(s)
| | - Frédéric Gagnadoux
- LUNAM Université, Angers, France; INSERM U1063, Angers, France; Département de Pneumologie, CHU d'Angers, France
| | - Wojciech Trzepizur
- LUNAM Université, Angers, France; INSERM U1063, Angers, France; Département de Pneumologie, CHU d'Angers, France
| | - Pascaline Priou
- LUNAM Université, Angers, France; INSERM U1063, Angers, France; Département de Pneumologie, CHU d'Angers, France
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Jian W, Edom RW, Xue X, Huang MQ, Fourie A, Weng N. Quantitation of leukotriene B(4) in human sputum as a biomarker using UPLC-MS/MS. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 932:59-65. [PMID: 23831697 DOI: 10.1016/j.jchromb.2013.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 06/03/2013] [Accepted: 06/07/2013] [Indexed: 11/17/2022]
Abstract
Leukotriene B4 (LTB4) is a potent mediator of inflammation and has been recognized as an important target for therapeutic intervention for treatment of diseases such as asthma. In the current work, a highly selective and sensitive UPLC-MS/MS assay was developed for quantitation of LTB4 in human sputum as a biomarker for LTB4 biosynthesis inhibition. A fit-for-purpose strategy for method development, assay qualification, and study support was adopted for this biomarker project. A surrogate matrix (protein buffer) was used for preparation of calibration samples and certain levels of quality control (QC) samples to avoid interference from endogenous analyte, while the low QC was prepared in authentic matrix, human sputum. The analytical methodology utilized a liquid-liquid extraction procedure in 96-well plate format. Chromatographic separation was achieved with a reversed-phase ultra high pressure liquid chromatography (UPLC) column using gradient elution, and the run time was 4.5min per sample. The lower limit of quantitation (LLOQ) was 0.2ng/mL, and the calibration curve range was 0.2-20ng/mL. Acceptable accuracy, precision, linearity, specificity, recovery, and matrix effect was obtained. Bench-top stability (6h), freeze-thaw stability (3 cycles at -20°C), and autosampler stability (97h at ambient temperature) all met acceptance criteria. Frozen long-term stability for 166 days at -20°C in sputum did not meet acceptance criteria by showing only ≥75% of nominal concentration and the information was taken into consideration for study support. Two important observations in the current work were: (1) LTB4 was unstable in sputum in the presence of liquification reagent dithiothreitol (DTT). Therefore, a non-DTT treatment method for sputum processing was developed and applied to the bioanalytical assay and clinical study support; and (2) chromatographic separation of LTB4 from its three non-enzymatically derived isomers, i.e. 6-trans-LTB4, 12-epi-LTB4, and 6-trans-12-epi-LTB4, was achieved. This assay was successfully applied to a Phase II clinical study for proof-of-concept of a LTA4 hydrolase inhibitor for treatment of asthma.
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Affiliation(s)
- Wenying Jian
- Drug Safety Sciences, Janssen Research & Development, Johnson & Johnson, Raritan, NJ 08869, USA.
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Wang Z, Li AY, Guo QH, Zhang JP, An Q, Guo YJ, Chu L, Weiss JW, Ji ES. Effects of cyclic intermittent hypoxia on ET-1 responsiveness and endothelial dysfunction of pulmonary arteries in rats. PLoS One 2013; 8:e58078. [PMID: 23555567 PMCID: PMC3589442 DOI: 10.1371/journal.pone.0058078] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 01/31/2013] [Indexed: 11/26/2022] Open
Abstract
Obstructive sleep apnoea (OSA) is a risk factor for cardiovascular disorders and in some cases is complication of pulmonary hypertension. We simulated OSA by exposing rats to cyclic intermittent hypoxia (CIH) to investigate its effect on pulmonary vascular endothelial dysfunction. Sprague-Dawley Rats were exposed to CIH (FiO2 9% for 1 min, repeated every 2 min for 8 h/day, 7 days/wk for 3 wk), and the pulmonary arteries of normoxia and CIH treated rats were analyzed for expression of endothelin-1 (ET-1) and ET receptors by histological, immunohistochemical, RT-PCR and Western Blot analyses, as well as for contractility in response to ET-1. In the pulmonary arteries, ET-1 expression was increased, and ET-1 more potently elicited constriction of the pulmonary artery in CIH rats than in normoxic rats. Exposure to CIH induced marked endothelial cell damage associated with a functional decrease of endothelium-dependent vasodilatation in the pulmonary artery. Compared with normoxic rats, ETA receptor expression was increased in smooth muscle cells of the CIH rats, while the expression of ETB receptors was decreased in endothelial cells. These results demonstrated endothelium-dependent vasodilation was impaired and the vasoconstrictor responsiveness increased by CIH. The increased responsiveness to ET-1 induced by intermittent hypoxia in pulmonary arteries of rats was due to increased expression of ETA receptors predominantly, meanwhile, decreased expression of ETB receptors in the endothelium may also participate in it.
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MESH Headings
- Animals
- Endothelin-1/biosynthesis
- Endothelium, Vascular/metabolism
- Endothelium, Vascular/pathology
- Endothelium, Vascular/physiopathology
- Gene Expression Regulation
- Hypertension, Pulmonary/etiology
- Hypertension, Pulmonary/metabolism
- Hypertension, Pulmonary/pathology
- Hypertension, Pulmonary/physiopathology
- Hypoxia/complications
- Hypoxia/metabolism
- Hypoxia/pathology
- Hypoxia/physiopathology
- Male
- Pulmonary Artery/metabolism
- Pulmonary Artery/pathology
- Pulmonary Artery/physiopathology
- Rats
- Rats, Sprague-Dawley
- Receptors, Endothelin/biosynthesis
- Sleep Apnea, Obstructive/complications
- Sleep Apnea, Obstructive/metabolism
- Sleep Apnea, Obstructive/pathology
- Sleep Apnea, Obstructive/physiopathology
- Vasoconstriction
- Vasodilation
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Affiliation(s)
- Zhuo Wang
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Ai-Ying Li
- Department of Biochemistry, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Qiu-Hong Guo
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Jian-Ping Zhang
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Qi An
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Ya-jing Guo
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - Li Chu
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
| | - J. Woodrow Weiss
- Division of Pulmonary, Critical Care, and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
- * E-mail: (ESJ); (JWW)
| | - En-Sheng Ji
- Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei, People's Republic of China
- * E-mail: (ESJ); (JWW)
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17
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Michaelis T, Andretta M, Albers C, Skare TL, Ribas CAPM, Moreira LB. Avaliação da capilaroscopia usando Endotelina-1 como um marcador de ativação endotelial na lesão microvascular e úlceras cutâneas. Rev Col Bras Cir 2012. [DOI: 10.1590/s0100-69912012000200008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJETIVO: Avaliar a presença da ET-1 em pacientes portadores de esclerodermia e a sua correlação com o nível de atividade da doença; verificar se os níveis de endotelina estão associados com o perfil clínico e de autoanticorpos da esclerodermia e, ainda, se há associação com lesão microvascular detectada pela capilaroscopia periungueal. MÉTODOS: Um total de 74 pacientes, sendo 37 portadores de esclerodermia e o restante controle, foram submetidos à dosagem de ET-1 por meio de teste de ELISA. Pacientes com esclerodermia foram analisados através de um questionário sobre características da doença e pesquisa de autoanticorpos. A gravidade da doença foi definida pelos critérios de Medsger e a doença microvascular foi acessada através de capilaroscopia periungueal. RESULTADOS: Dos 37 pacientes com esclerodermia três (8,1%) eram homens e 34 (91,89%) mulheres, com idade média de 48,97 ? 13,36 anos e tempo médio de doença de 42,54 ? 13,35 anos. Os valores da ET-1 nos controles foram de 0,41 a 5,65 pg/ml (mediana de 2,26 pg/ml) e nos com esclerodermia de 0,41 a 8.82 pg/ml (mediana de 0,41 pg/ml) com p de 0,0007. Não houve correlação com o tempo de doença, idade do paciente e com o nível de acometimento cutâneo. Não encontrou-se correlação entre nível de ET-1 sérica e gravidade da doença (p=0,13). Níveis maiores de ET-1 foram observados na forma de superposição (1,49 a 6,82 pg/ml). CONCLUSÃO: Os níveis de ET-1 em esclerodérmicos mostraram-se inferiores aos controles. Não houve associação dos níveis de ET-1 com as variáveis estudadas.
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Affiliation(s)
| | | | | | - Thelma Larocca Skare
- Faculdade Evangélica do Paraná; Hospital Universitário Evangélico de Curitiba, Brasil
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18
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Tuleta I, Pabst S, Juergens UR, Nickenig G, Skowasch D. Obstructive sleep apnoea as a risk factor for atherosclerosis - implication for preventive and personalised treatment. EPMA J 2011. [PMID: 23199125 PMCID: PMC3405376 DOI: 10.1007/s13167-011-0070-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Atherosclerosis with its manifestations and associated diseases is a main cause of morbidity and mortality in industrial countries. The pathomechanisms underlying atherosclerosis are complex and comprise exogenous factors as well as genetic predisposition. Beyond the well-defined risk factors for the development of atherosclerosis, obstructive sleep apnoea (OSA) merits more and more attention. A growing body of evidence has associated OSA with vascular pathologies. Although the exact mechanisms involved are not known, the occurrence of intermittent hypoxia typical for OSA may lead to oxidative stress, inflammation, metabolic and neural changes which in turn are responsible for vessel dysfunction underlying atherosclerosis. It has been demonstrated that therapy with continuous positive airway pressure (CPAP) plays a vasoprotective role. This review summarises data resulting from epidemiological and clinical studies with emphasis on the possible mechanisms linking OSA with atherosclerosis, predictive biomarkers helping identify OSA patients at high cardiovascular risk and personalised treatment approaches.
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19
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Wang R, Dashwood RH. Endothelins and their receptors in cancer: identification of therapeutic targets. Pharmacol Res 2011; 63:519-24. [PMID: 21251982 DOI: 10.1016/j.phrs.2011.01.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2010] [Revised: 12/21/2010] [Accepted: 01/04/2011] [Indexed: 11/15/2022]
Abstract
Endothelins and their receptors are important in normal physiology, but have been implicated in various pathophysiological conditions. Members of the so-called "endothelin axis" are dysregulated in a wide range of human cancers, opening the door for novel anticancer therapies. Established cancer chemotherapeutic agents and drugs that target specific components of the endothelin axis have been combined with promising results, but more work is needed in this area. The endothelin axis affects numerous signaling pathways, including Ras, mitogen activated protein kinases, β-catenin/T-cell factor/lymphoid enhancer factor, nuclear factor-κB (NFκB), SNAIL, and mammalian target of rapamycin (mTOR). There is much still to learn about optimizing drug specificity in this area, while minimizing off-target effects. Selective agonists and antagonists of endothelins, their receptors, and upstream processing enzymes, as well as knockdown strategies in vitro, are providing valuable leads for testing in the clinical setting. The endothelin axis continues to be an attractive avenue of scientific endeavor, both in the cancer arena and in other important health-related disciplines.
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Affiliation(s)
- Rong Wang
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331-6512, USA
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20
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Abstract
Over two decades of research have demonstrated that the peptide hormone endothelin-1 (ET-1) plays multiple, complex roles in cardiovascular, neural, pulmonary, reproductive, and renal physiology. Differential and tissue-specific production of ET-1 must be tightly regulated in order to preserve these biologically diverse actions. The primary mechanism thought to control ET-1 bioavailability is the rate of transcription from the ET-1 gene (edn1). Studies conducted on a variety of cell types have identified key transcription factors that govern edn1 expression. With few exceptions, the cis-acting elements bound by these factors have been mapped in the edn1 regulatory region. Recent evidence has revealed new roles for some factors originally believed to regulate edn1 in a tissue or hormone-specific manner. In addition, other mechanisms involved in epigenetic regulation and mRNA stability have emerged as important processes for regulated edn1 expression. The goal of this review is to provide a comprehensive overview of the specific factors and signaling systems that govern edn1 activity at the molecular level.
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Affiliation(s)
- Lisa R Stow
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL 32610, USA
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