Role of pulmonary sympathetic nerves in the regulation of the pulmonary circulation by beta-receptors on pulmonary macrophages during chronic intermittent hypoxia
Project/Area Number |
16H05126
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
General physiology
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Research Institution | National Cardiovascular Center Research Institute |
Principal Investigator |
SHIRAI Mikiyasu 国立研究開発法人国立循環器病研究センター, 研究所, 特任研究員 (70162758)
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Co-Investigator(Kenkyū-buntansha) |
川口 章 東海大学, 医学部, 客員教授 (30195052)
Pearson James 国立研究開発法人国立循環器病研究センター, 研究所, 部長 (30261390)
土持 裕胤 国立研究開発法人国立循環器病研究センター, 研究所, 室長 (60379948)
中岡 良和 国立研究開発法人国立循環器病研究センター, 研究所, 部長 (90393214)
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2018: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | 生理学 / 循環器・高血圧 / 肺高血圧 / マクロファージ / 肺交感神経 / 肺高血圧症 / 間歇的低酸素 |
Outline of Final Research Achievements |
There are no consistent reports as to whether small animal models exposed to chronic intermittent hypoxia develop pulmonary arterial hypertension. This research revealed two sympathetic neural mechanisms that suppress the progression of pulmonary hypertension in rats exposed to six weeks of chronic intermittent hypoxia. The first is a mechanism that releases nitric oxide through activation of iNOS by β3-adrenergic receptors on macrophages recruited to the vicinity of small pulmonary arteries by intermittent hypoxia. The other involves β2-adrenergic receptors induced within the endothelium of small pulmonary arteries. These pulmonary dilatory mechanisms are activated by the accentuation of hypoxic sympathetic neural activity to inhibit the hypoxic vasoconstriction that occurs with the local mechanism in the lung. These findings suggest that pulmonary protection occurs through β-adrenergic receptors via the accentuation of hypoxic sympathetic neural activity.
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Academic Significance and Societal Importance of the Research Achievements |
慢性間歇的低酸素負荷ラットで見出された肺マクロファージのβ3アドレナリン受容体を介した肺高血圧症抑制機構は、肺循環の神経・免疫性調節という新たな概念を提唱し、肺高血圧症の治療・予防法開発に貢献するものと考える。 慢性間歇的低酸素は睡眠時無呼吸症候群の基本病態とされているが、この症候群の合併症である体循環の高血圧に対して、β遮断薬も治療薬の選択肢となっている。本研究で明らかになった交感神経系を介したβ受容体性肺血管拡張機構並びに肺高血圧症抑制機構は、今後の治療におけるβ遮断薬の使用に対して重大な警鐘を鳴しており、睡眠時無呼吸症候群の予後改善に大いに役立つものと期待される。
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Report
(4 results)
Research Products
(34 results)
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[Journal Article] Widespread Coronary Dysfunction in the Absence of HDL Receptor SR-B1 in an Ischemic Cardiomyopathy Mouse Model.2017
Author(s)
Pearson JT, Yoshimoto M, Chen YC, Sultani R, Edgley AJ, Nakaoka H, Nishida M, Umetani K, Waddingham MT, Jin HL, Zhang Y, Kelly DJ, Schwenke DO, Inagaki T, Tsuchimochi H, Komuro I, Yamashita S, Shirai M.
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Journal Title
Sci Rep
Volume: Dec 22;7(1)
Issue: 1
Pages: 18108-18108
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Influence of coronary architecture on the variability in myocardial infarction induced by coronary ligation in rats.2017
Author(s)
Kainuma S, Miyagawa S, Fukushima S, Tsuchimochi H, Sonobe T, Fujii Y, Pearson JT, Saito A, Harada A, Toda K, Shirai M, Sawa Y.
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Journal Title
PLoS One
Volume: 12(8)
Issue: 8
Pages: e0183323-e0183323
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Vagal denervation inhibits the increase in pulmonary blood flow during partial lung aeration at birth.2017
Author(s)
Lang JA, Pearson JT, Binder-Heschl C, Wallace MJ, Siew ML, Kitchen MJ, Te Pas AB, Lewis RA, Polglase GR, Shirai M, Hooper SB.
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Journal Title
J Physiol.
Volume: 595(5)
Issue: 5
Pages: 1593-1606
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Chronic intermittent hypoxia accelerates coronary microcirculatory dysfunction in insulin-resistant Goto-Kakizaki rats.2016
Author(s)
Chen YC, Inagaki T, Fujii Y, Schwenke DO, Tsuchimochi H, Edgley AJ, Umetani K, Zhang Y, Kelly DJ, Yoshimoto M, Nagai H, Evans RG, Kuwahira I, Shirai M, Pearson JT.
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Journal Title
Am J Physiol Regul Integr Comp Physiol.
Volume: 311(2)
Issue: 2
Pages: 426-439
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] Effect of insulin resistance on compound 21 mediated coronary microvascular dilation in female rats in vivo.2017
Author(s)
JT Pearson, P Meagher, H Tsuchimochi, AJ Edgley, M Yoshimoto, MT Waddingham, YC Chen, KM Mirabito Colafella, LM Hilliard, K Umetani, RE Widdop, M Shirai, KM Denton
Organizer
ESC Congress 2017
Related Report
Int'l Joint Research
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[Presentation] Beta-blockade prevents coronary microvascular endothelial dysfunction in non-obese salt-sensitive insulin resistant rats on a high salt diet.2017
Author(s)
H Tsuchimochi, H Thambyah, AJ Edgley, T Inagaki, MT Waddingham, YC Chen, CK Du, DY Zhan, V Sukumaran, T Sonobe, K Umetani, M Shirai, JT Pearson
Organizer
ESC Congress 2017
Related Report
Int'l Joint Research
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