Functional analysis of neuron-like cells differentiated from neural stem cells derived from bone marrow stroma cells in vitro

Cell Mol Neurobiol. 2008 Jun;28(4):545-58. doi: 10.1007/s10571-007-9174-9. Epub 2007 Sep 28.

Abstract

The transversal differentiation of bone marrow stroma cell (BMSCs) into neural stem cells (NSCs) has attracted much attention in recent years because of their therapeutic potential. However, the problem in therapeutic application of NSCs was how to confirm whether neuron-like cells differentiated from bone marrow stroma cell-derived neural stem cells (BMSCs-D-NSCs) possess corresponding functions of neurochemistry and electrophysiology. In the present study, we tried to affirm the function of neuron-like cells differentiated from BMSCs-D-NSCs in vitro. The BMSCs were harvested by gradient centrifugation in Ficoll-Paque and cultured in "NSCs medium". Immunocytochemistry was used to detect positive expression of neuron-specific nuclear protein (NeuN) in neuron-like cells derived from the BMSCs-D-NSCs. High-pressure liquid chromatography (HPLC) was used to identify neuron-like cells by detecting excitable amino acids [aspartic acid (Asp), glutamic acid (Glu)], inhibited amino acids [glycine (Gly), gamma (gamma) -aminobutyric acid (GABA), alanine (Ala)] or monoamines [noradrenaline (NE), 5-hydroxytryptamine (5-HT), dopamine (DA)]. Electrophysiological properties of the neuron-like cells were also examined using patch clamp analysis to verify their neuron-like functions. It was found that the neuron-like cells differentiated from the BMSCs-D-NSCs could express positive NeuN, synthesize and excrete amino acids, and show some typical electrophysiological properties including the typical Na+ and K+ ion channel membrane current under the voltage patch clamp condition, the typical static electrical membrane potential under the current patch clamp condition, and the differential membrane capacitance and resistance values in series between undifferentiated BMSCs-D-NSCs and differentiated neuron-like cells under the whole-cell patch clamp condition. The neuron-like cells differentiated from BMSCs-D-NSCs exhibit both neuron-like biochemical function and some corresponding electrophysiological properties.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biogenic Monoamines / pharmacology
  • Bone Marrow Cells / cytology
  • Bone Marrow Cells / drug effects
  • Bone Marrow Cells / physiology*
  • Cell Culture Techniques
  • Cell Differentiation* / drug effects
  • Cell Shape
  • Cells, Cultured
  • Electrophysiology
  • Macaca mulatta
  • Neurons / cytology
  • Neurons / drug effects
  • Neurons / physiology*
  • Rabbits
  • Stem Cells / cytology
  • Stem Cells / drug effects
  • Stem Cells / physiology*
  • Stromal Cells / drug effects
  • Stromal Cells / physiology*

Substances

  • Biogenic Monoamines