Effect of fluid shear stress on migration of vascular smooth muscle cells in cocultured model

Naoya Sakamoto, Toshiro Ohashi, Masaaki Sato

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

Migration of smooth muscle cells (SMCs) in hyperplasia is thought to have a correlation with blood flow conditions. In this study, the effect of shear stress applied to endothelial cells (ECs) on SMC migration was examined using a newly designed EC-SMC coculture model (CM), in which bovine SMCs and ECs were separated by a collagen layer and a membrane filter. After exposing the CM to shear stresses of 0.5, 1.0, or 1.5 Pa for 48 h, the number of SMCs migrating into the collagen layer was counted. Under static conditions, the migration of SMCs in the CM increased compared with SMCs cultured alone. Shear stress of 1.5 Pa significantly suppressed the SMC migration (p < 0.05) compared with the static CM. Media conditioned with the CM exposed to shear stress of 1.0 Pa (p < 0.05) and 1.5 Pa (p < 0.005) exhibited reduction in activated matrix metalloproteinase-2 (MMP-2) compared with the static CM, as analyzed by zymography. Addition of an inhibitor of nitric oxide (NO) synthase, N ω-nitro-L-arginine methyle ester, to the media inhibited the effect of 1.5 Pa shear stress on SMC migration but MMP-2 activity was unaffected. These results suggest that physiological shear stress has protective roles in atherosclerogenesis.

Original languageEnglish
Pages (from-to)408-415
Number of pages8
JournalAnnals of Biomedical Engineering
Volume34
Issue number3
DOIs
Publication statusPublished - 2006 Mar

Keywords

  • Coculture
  • Endothelial cells
  • Intimal hyperplasia
  • Matrix metalloproteinase-2
  • Nitric oxide
  • Smooth muscle cell migration

ASJC Scopus subject areas

  • Biomedical Engineering

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