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Medical and Biological Engineering and Computing

, Volume 43, Issue 1, pp 126–130 | Cite as

Sprouting from arteriovenous shunt vessels with increased blood flow

  • Y. Asano
  • S. IchiokaEmail author
  • M. Shibata
  • J. Ando
  • T. Nakatsuka
Article

Abstract

The purpose of this study was to evaluate the effect of increased blood flow on angiogenesis at the large vessels. The arteriovenous (AV) shunt was made on the thigh of male Wistar rats (n=27) to increase blood flow, wrapped with artificial skin dermis, which consisted of a silicon outer layer, and isolated from surrounding tissues. Blood flow increased from 2.40±0.77 to 35.8±8.7 ml min−1 (14.9 times), and the shear stress index (relative value of shear stress) increased from 10.7±3.6 to 73.4±18.1 (6.85 times) 60 min after the shunt formation. Newly formed vessels were observed around the AV shunt loop. Scanning electron micrographs at the AV shunt vessel lumen showed modified endothelial cells at day 7 and a remarkable number of pores at day 14. The volume of newly formed vessels was increased 12 times from day 5 to day 14. The mechanical factor of shear stress was considered the major stimulator of angiogenesis. This is the first report of electron-microscopic observation of sprouts from a large vessel lumen. The new AV shunt model is useful for basic research on angiogenesis at the large vessels in vivo and, furthermore, could generate vascularised tissues with various cultured cells.

Keywords

Angiogenesis Sprouting Increased blood flow Shear stress Arteriovenous shunt 

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Copyright information

© FMBE 2005

Authors and Affiliations

  • Y. Asano
    • 1
  • S. Ichioka
    • 2
    Email author
  • M. Shibata
    • 3
  • J. Ando
    • 3
  • T. Nakatsuka
    • 2
  1. 1.Department of Plastic SurgeryUniversity of TokyoJapan
  2. 2.Department of Plastic SurgerySaitama Medical SchoolSaitamaJapan
  3. 3.Department of Biomedical Engineering, Faculty of MedicineUniversity of TokyoJapan

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