Nitric oxide production by bone cells is fluid shear stress rate dependent

R.G. Bacabac, T.H. Smit, M.G. Mullender, S.J. Dijcks, J.J.W.A. van Loon, J. Klein Nulend

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Shear stress due to mechanical loading-induced flow of interstitial fluid through the lacuno-canalicular network is a likely signal for bone cell adaptive responses. Moreover, the rate (determined by frequency and magnitude) of mechanical loading determines the amount of bone formation. Whether the bone cells' response to fluid shear stress is rate dependent is unknown. Here we investigated whether bone cell activation by fluid shear stress is rate dependent. MC3T3-E1 osteoblastic cells were subjected for 15min to fluid shear stress of varying frequencies and amplitudes, resulting in peak fluid shear stress rates ranging from 0 to 39.6Pa-Hz. Nitric oxide production, a parameter for bone cell activation, was found to be linearly dependent on the fluid shear stress rate; the slope was steepest at 5min (0.11Pa-Hz-1) and decreased to 0.03Pa-Hz-1 at 15min. We conclude that the fluid shear stress rate is an important parameter for bone cell activation.

Original languageUndefined/Unknown
Pages (from-to)823-829
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number4
Publication statusPublished - 19 Mar 2004


  • Bone cells
  • Bone formation
  • Fluid flow
  • Fluid shear stress rate
  • MC3T3-E1
  • Mechanical loading
  • Microgravity
  • Nitric oxide
  • Osteoblasts
  • Parallel-plate chamber

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