Sprouting from arteriovenous shunt vessels with increased blood flow

Y. Asano, Shigeru Ichioka, M. Shibata, J. Ando, T. Nakatsuka

Research output: Contribution to journalArticle

23 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)126-130
Number of pages5
JournalMedical and Biological Engineering and Computing
Volume43
Issue number1
DOIs
Publication statusPublished - 2005 Jan 1

Keywords

  • Angiogenesis
  • Arteriovenous shunt
  • Increased blood flow
  • Shear stress
  • Sprouting

ASJC Scopus subject areas

  • Biomedical Engineering
  • Computer Science Applications

Fingerprint Dive into the research topics of 'Sprouting from arteriovenous shunt vessels with increased blood flow'. Together they form a unique fingerprint.

  • Cite this