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Mechanisms of the cause of pressure sore in skin blood vessels and its prevention

Research Project

Project/Area Number 08672620
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 応用薬理学・医療系薬学
Research InstitutionNagano College of Nursing

Principal Investigator

IWATSUKI Kazuhiko  Nagano College of Nursing・Nursing, Professor, 看護学部, 教授 (20004666)

Co-Investigator(Kenkyū-buntansha) CHIBA Shigetoshi  Shinshu University・School of Medicine, Professor, 医学部, 教授 (30004659)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1997: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1996: ¥1,800,000 (Direct Cost: ¥1,800,000)
Keywordsblood vessels / pressure sore / blood pressure / prolyl hydroxylase activity / total collagen content / コラーゲン生合成 / コラーゲン代謝 / プロリルハイドロキシラーゼ / 血管壁
Research Abstract

We have previously shown that, in two models of hypertension in rats, there is increased synthesis and deposition of collagen in the arteries. Since the veins normally contain as much collagen as the arteries on a weight-per-weight basis, it was of interest to determine the effects of hypertension on venous collagen. The arterial blood pressure of 30 weeks old SHR and WKY were 208(]SY.+-。[)3.3 mmHg and 120(]SY.+-。[)3.4 mmHg, respectively. The venous blood pressures were normally very low and were not significantly increased in SHR (-13(]SY.+-。[)3.0 mmH<@D22@>D2O) and WKY (-23(]SY.+-。[)5.6 mmH<@D22@>D2O). In SHR,it was shown that collagen synthesis (Prolyl hydroxylase activites) and deposition (total collagen content) are increased in the aorta and mesenteric arteries where blood pressure is elevated. By contrast, there were no alterations in any of the markers of collagen synthesis and deposition in vena cava and mesenteric veins, where blood pressure was only slightly elevated.
It would appear that the stimulus for vascular collagen synthesis is provided by a direct effect of the increased pressure on the arterial cells rather than by a humoral factor released into the general circulation. It remains to be seen as to just how the increased blood pressure stimulates arterial collagen synthesis and the accompanying fibrosis.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Chiba, S.: "Possible involvement of muscarinic M1 and M3 receptor subtypes mediating vasodilation inisolated,perfused canine lingual arteries." Clin.Exp.Pharmac.Physiol.,. 23. 839-843 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Ren, L-M: "Purinergic and adrenergic transmission and their presynapcic modulation in canine isolate perfused splenic arteries." European J.Pharmacol.,. 295. 61-68 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Orz, Y.I.: "No evidence of existence of functional 5-HT1 receptors in isolated and perfused canine basilar arteries." J.Clin.Neuroscience. 4. 228-233 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Chiba, S.and Ysukada, M.: "Possible involvement of muscarinic M1 and M3 receptor subtypes mediating vasodilation inisolated, perfused canine lingual arteries." Clin.Exp.Pharmac.Physiol.23. 839-843 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Ren, L-M,Nakane, T.and Chiba, S.: "Purinergic and adrenergic transmission and their presynaptic modulation in canine isolate perfused splenic arteries." European J.Pharmacol.295. 61-68 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Orz, Y.I., Tsuji, T.and Chiba, S.: "No evidence of existence of functional 5-HT1 receptors in isolated and perfused canine basilar arteries." J.Clin.Neuroscience. 4. 228-233 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary

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Published: 1996-04-01   Modified: 2016-04-21  

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