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Related Experiment Videos

CD1 gene expression in human skin

J T Elder1, N J Reynolds, K D Cooper

  • 1Department of Dermatology, University of Michigan, Ann Arbor 48109-0672.

Journal of Dermatological Science
|December 1, 1993
PubMed
Summary
This summary is machine-generated.

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CD1a and CD1c molecules are expressed in human skin. This study found that cell surface exclusion does not explain selective CD1c expression in the dermis, challenging previous hypotheses.

Area of Science:

  • Immunology
  • Dermatology
  • Cell Biology

Background:

  • CD1a expression is restricted to Langerhans cells (LC) in human epidermis.
  • CD1c expression is found in dermal and epidermal dendritic cells.
  • Transfected fibroblasts suggest CD1c cell surface expression may exclude CD1a/CD1b.

Purpose of the Study:

  • To investigate if cell surface exclusion mechanism regulates CD1c expression in human skin.
  • To compare surface expression of CD1a and CD1c with their mRNA levels in dermal and epidermal dendritic cells.

Main Methods:

  • Dual-label immunofluorescence microscopy
  • Northern blot hybridization
  • Reverse transcriptase-polymerase chain reaction (RT-PCR)
  • Immunomagnetic bead selection

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Main Results:

  • CD1c expression detected in both dermal and epidermal cells; CD1a mainly in epidermis.
  • Epidermal LC express both CD1a and CD1c mRNA and surface proteins.
  • Other epidermal cell types lack CD1a and CD1c expression.

Conclusions:

  • Cell surface exclusion is not the mechanism for selective CD1c expression in human dermis.
  • CD1a and CD1c expression patterns in human skin are complex and cell-specific.