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Related Experiment Videos

Human Langerhans cells express E-cadherin

A Blauvelt1, S I Katz, M C Udey

  • 1Dermatology Branch, National Cancer Institute, Bethesda, Maryland 20892.

The Journal of Investigative Dermatology
|February 1, 1995
PubMed
Summary

Human Langerhans cells (LC) express E-cadherin, a molecule crucial for cell adhesion. This finding suggests E-cadherin plays a role in maintaining Langerhans cells within the epidermis, similar to findings in mice.

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Area of Science:

  • Immunology
  • Cell Biology
  • Dermatology

Background:

  • E-cadherin is a cell adhesion molecule vital for cell-cell interactions.
  • Murine Langerhans cells (LC) express E-cadherin, mediating interactions with keratinocytes (KC).
  • E-cadherin's role in LC localization and epidermal egress is suggested but not fully understood in humans.

Purpose of the Study:

  • To investigate the expression of E-cadherin in human Langerhans cells.
  • To compare E-cadherin expression levels between human LC and keratinocytes.
  • To assess the stability of E-cadherin expression under different conditions.

Main Methods:

  • Human epidermal cells were obtained from suction blisters.
  • Two-color analytical flow cytometry and immunofluorescence microscopy were employed.
  • Cells were treated with trypsin/EDTA and cultured to assess E-cadherin stability.

Main Results:

  • A high percentage (82.9%) of freshly isolated human LC expressed E-cadherin.
  • E-cadherin expression levels were comparable between human LC and keratinocytes.
  • E-cadherin expression was abrogated by trypsin/EDTA but maintained in the presence of calcium; levels decreased after 3 days in culture.

Conclusions:

  • Human LC, similar to murine LC, express E-cadherin.
  • E-cadherin likely mediates LC-KC adhesion in human epidermis.
  • This molecule may be critical for establishing and maintaining LC-KC interactions in the skin.

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