Human keratinocytes migrate to the negative pole in direct current electric fields comparable to those measured in mammalian wounds

Karen Y. Nishimura, Roslyn Rivkah Isseroff, Richard Nucciteili

Research output: Contribution to journalArticle

202 Scopus citations

Abstract

Previous measurements of the lateral electric fields near skin wounds in guinea pigs have detected DC fields between 100-200 mV/mm near the edge of the wound. We have studied the translocation response of motile primary human keratinocytes migrating on a collagen substrate while exposed to similar physiological DC electric fields. We find that keratinocytes migrate randomly on collagen in fields of 5 mV/mm or less, but in larger fields they migrate towards the negative pole of the field, exhibiting galvanotaxis. Since these cells have an average cell length of 50 μm, this implies that they are able to detect a voltage gradient as low as 0.5 mV along their length. This cath-odally-directed movement exhibits increased directedness with increasing field strengths between 10 and 100 mV/mm. We observe a maximally directed response at 100 mV/mm with half of the cells responding to the field within 14 minutes. The average speed of migration tended to be greater in fields above 50 mV/mm than in smaller fields. We conclude that human keratinocytes migrate towards the negative pole in DC electric fields that are of the same magnitude as measured in vivo near wounds in mammalian skin.

Original languageEnglish (US)
Pages (from-to)199-207
Number of pages9
JournalJournal of Cell Science
Volume109
Issue number1
StatePublished - Jan 1996

Keywords

  • Electric field
  • Galvanotaxis
  • Keratinocyte
  • Wound healing

ASJC Scopus subject areas

  • Cell Biology

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