血清 thrombomodulin 濃度は, 冠動脈病変進展と逆相関し, tumor necrosis factor α, ホモシステイン, およびVCAM-1濃度とは正の相関がある Thrombomodulin concentrations correlate inversely with the extent of coronary atheroscrelosis, and positively with tumor necrosis factor α, homocysteine, and vascular cell adhesion molecule-1 concentrations
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- 山本 雅史 YAMAMOTO Masashi
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 渡邉 滋 WATANABE Shigeru
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 小宮山 伸之 KOMIYAMA Nobuyuki
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 宮崎 彰 MIYAZAKI Akira
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 増田 善昭 MASUDA Yoshiaki
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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Author(s)
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- 山本 雅史 YAMAMOTO Masashi
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 渡邉 滋 WATANABE Shigeru
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 小宮山 伸之 KOMIYAMA Nobuyuki
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 宮崎 彰 MIYAZAKI Akira
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
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- 増田 善昭 MASUDA Yoshiaki
- 千葉大学医学部内科学第三講座 3rd Department of Internal Medicine, School of Medicine, Chiba University
Abstract
冠動脈の動脈硬化の進展と各種動脈硬化促進因子の血清濃度との関係を調べ, 第一にトロンボモデュリン(TM)が, 冠動脈硬化の進展に比例して上昇するのではなく, 内皮機能障害が進むことでTM産生能も低下する仮説を調べた。第二に, TM, VCAM-1, ホモシステイン(HC), TNF-αが相互に作用しあっている可能性の傍証として各種分子の血清濃度の相関関係を検討した。経皮経管冠動脈形成術(PTCA)を施行した48例(男性36例, 女性12例, 平均年齢59±8歳)に対し, 空腹時の動脈血採血をヘパリン注射前に行った。冠動脈硬化の進展の指標として, 1)病変枝数, 2)Gensiniscore, および3)Coronary extent scoreを用いた。病変枝数で群分けした場合では, いずれの物質の血清濃度も群間で有意差は認められなかった。Gensini scoreが40未満の群と40以上の群で分けた場合では, Gensini scoreが40以上の群でHbAlcは有意に高く, TMは有意に低かった。Coronary extent score(狭窄箇所数)が1箇所の群と, 2〜4箇所の群および5箇所以上の群で分けた場合では, 群間有意差を認めた物質はTMのみであり, 狭窄箇所数の増加に連れて血清濃度が低下する傾向にあった。また, TM, VCAM-1, HC, TNF-αの間には, 互いに強い相関が認められた。この結果の説明として, 病変の進展とともに血管内皮機能が障害されてTM産生が低下したと考えられる。また, HCとTMの間の強い相関は, HCが血管内皮細胞にダメージを与えてTMの遊離や発現を促している可能性を示唆している。同様に, HCがVCAM-1の発現に関与している可能性や, TNF-αが血管内皮細胞におけるTMの発現を促している可能性が考えられた。
We correlated the extent of coronary artery sclerosis with the serum concentrations of chemical risk factors for the development of atherosclerosis, especially soluble thrombomodulin (sTM). We hypothesized that extensive coronary artery endothelial damage decreases sTM expression. We also determined the relationships between sTM, tumor necrosis factor-α (TNF α), homocysteine (HC), and vascular cell adhesion molecule-1 (VCAM-1) serum concentrations in 48 patients (36 men and 12 women) with coronary artery disease. The angiographic extent of coronary atherosclerosis was evaluated based on 1) the number of major vessels with stenosis, 2) Gensini's severity score, and 3) the coronary extent score. No significant associations were observed between the number of diseased vessels and the serum concentrations of key factors. When patients were grouped according to Gensini's severity score, the HbAlc concentration was significantly higher and uric acid and sTM concentrations were significantly lower in the high score group (>40) than in the low score group. When patients were grouped based on the coronary extent score, the serum sTM concentrations were significantly higher in patients with one stenosis than patients with ≧2 stenoses. Furthermore, there were significant relationships between the sTM, HC, TNF α, and VCAM-1. We conclude that the progression of endothelial damage decreased the expression of sTM. In contrast, endothelial cell injury in the setting of increased HC concentrations was associated with increased TM and VCAM-1 expression. Furthermore, TNF α must also stimulate the expression of TM and VCAM-1.
Journal
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- Chiba medical journal
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Chiba medical journal 77(4), 231-240, 2001-08-01
Chiba University
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