Different Contractile Properties between Intralobar and Extralobar Pulmonary Arteries of the Rabbit

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概要

• 論文の詳細を見る

• In pulmonary circulation, small muscular resistance arteries are known to have different receptor properties and sensitivity to neurotransmitters from those of large elastic conduit arteries. It is, however, not yet certain whether the different properties are primarily due to the diameter or the location of arteries. In the present study, we compared the contractile responses to various agonists among large extralobar (ELPA, diameter : 2-3 mm), large intralobar (ILPA, diameter : 2-3 mm), and small intralobar pulmonary arteries (SPA, diameter : 300-500 μm) of the rabbit. There were no differences in normalized dose-response curves to KCl among three groups. Half maximum doses (EC_<50> in mM) were 38.0 ± 2.0 (n=8, mean ± SEM) in ELPA, 36.9 ± 2.4 (n=10) in ILPA, and 39.0 ± 0.9 (n=12) in SPA. Responses to phenylephrine, epinephrine, histamine, serotonin, and PGF_<2α> were normalized and expressed as a relative contraction against maximum tension to KCl. In ELPA, the contractile responses to various agents showed the following sequence : KCl > epinephrine > phenylephrine > serotonin > PGF_<2α> > histamine. In ILPA and SPA, the sequence was : KCl > histamine > PGF_<2α> > serotonin. There was little response to phenylephrine and epinephrine in ILPA and SPA. These results demonstrate that the difference of contractile responses between ELPA and ILPA was more prominent than that between ILPA and SPA, suggesting that the location is more important than the diameter itself in determining the characteristic contractile responses of pulmonary arteries.

• 日本平滑筋学会の論文

著者

• LEE Sang

  Department of Pulmonary and Critical Care Medicine, Gachon University, Gil Medical Center

• Lee S

  Millimeter-wave Inovation Technology Research Center (mint) Dongguk Univerisity

• Lee Sang

  Department Of Physiology College Of Medicine Chungbuk National University

• Kang T

  Sungkyunkwan Univ. School Of Medicine Suwon Kor

• Kang Tong

  Department Of Oriental Pharmaceutical Development Nambu University

• LEE Suk

  Department of Information Statistics, ChungNam National University

• Lee Sang

  Department Of Advanced Materials Science And Engineering Mokpo National University

• PARK Myoung

  Department of Laboratory Medicine, Seoul National University, College of Medicine

• UHM Dae

  Department of Physiology, College of Medicine, Sungkyunkwan University

• HO Won-Kyung

  Department of Physiology and Biophysics, College of Medicine, Seoul National University

• EARM Yung

  Department of Physiology and Biophysics, College of Medicine, Seoul National University

• Park Myoung

  Department Of Laboratory Medicine Seoul National University College Of Medicine

• Lee Sang

  Millimeter-wave Inovation Technology Research Center (mint) Dongguk Univerisity

• Uhm Dae

  Department Of Physiology Sungkyunkwan University School Of Medicine

• Earm Yung

  Department Of Physiology And Biophysics College Of Medicine Seoul National University

• Park Myoung

  Department Of Physiology Sungkyunkwan University School Of Medicine

• Ho Won-kyung

  Department Of Physiology And Biophysics College Of Medicine Seoul National University

• Lee Suk

  Department Of Physiology And Biophysics College Of Medicine Seoul National University

• Kang Tong

  Department Of Oriental Medicinal Materials & Processing College Of Life Science Kyung Hee Univer

• Lee Suk

  Department Of Information Statistics Chungnam National University

• Lee Suk

  Department Of Industrial Engineering Korea Advanced Institute Of Science And Technology

• LEE Sang

  Department of Acupuncture & Moxibustion, College of Oriental Medicine, Kyung Hee University

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