Journal of Fluorescence

, Volume 6, Issue 2, pp 77–82 | Cite as

Assessment of murine neuroblastoma (N1E-115) resting membrane potential by confocal microscopy

  • Miguel Hernandez
  • William S. Kisaalita
  • Mark A. Farmer


Digital imaging (confocal microscopy) and a slow potentiometric dye (tetramethylrhodamine methyl ester) were used to assess the resting membrane potential (Vm) of murine neuroblastoma cells (N1E-115). The averageVm was found to be −64.0±2.0 mV. The difference between this and the previously reported higher values was attributed to the use of glass microelectrode techniques that probably caused mechanical injury to the cell membranes: Digital imaging of N1E-115Vm was found to be sensitive, reproducible, fast, and simple.

Key words

Resting membrane potential tetramethylrhodamine methyl ester confocal microscopy neuroblastoma N1E-115 


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Copyright information

© Plenum Publishing Corporation 1996

Authors and Affiliations

  • Miguel Hernandez
    • 1
  • William S. Kisaalita
    • 1
  • Mark A. Farmer
    • 2
  1. 1.Biological and Agricultural Engineering Department, Driftmier Engineering CenterUniversity of GeorgiaAthens
  2. 2.Department of Cellular Biology, Center for Advanced Ultrastructural ResearchUniversity of GeorgiaAthens

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