Hyperpolarization of human mesenchymal stem cells in response to magnetic force

IEEE Trans Nanobioscience. 2010 Mar;9(1):71-4. doi: 10.1109/TNB.2010.2042065.

Abstract

Magnetic particle tagging techniques are currently being applied to tissue engineering applications such as controlled differentiation of mesenchymal stem cells (MSC). In order to define key mechanotransducers underpinning these applications, the electrophysiological responses of human MSCs (hMSC) have been investigated. Ferromagnetic microparticles were coated with L-arginyl-glycyl-L-aspartic acid in order to target the application of dynamic force (6 pN) directly to cell surface integrins. Human MSCs demonstrated cell membrane hyperpolarization responses after the application of force, mediated by BK channels and intracellular calcium release.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Analysis of Variance
  • Calcium Channels
  • Cell Polarity / physiology*
  • Cell Polarity / radiation effects
  • Cells, Cultured
  • Electromagnetic Fields
  • Electrophysiology / methods*
  • Ferric Compounds / chemistry*
  • Humans
  • Large-Conductance Calcium-Activated Potassium Channels
  • Membrane Potentials* / drug effects
  • Membrane Potentials* / physiology
  • Mesenchymal Stem Cells / cytology*
  • Nifedipine / pharmacology
  • Thapsigargin / pharmacology

Substances

  • Calcium Channels
  • Ferric Compounds
  • Large-Conductance Calcium-Activated Potassium Channels
  • ferrite
  • Thapsigargin
  • Nifedipine