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Related Experiment Videos

IFN-gamma modulates CD1d surface expression on intestinal epithelia

S P Colgan1, V M Morales, J L Madara

  • 1Department of Anesthesia, Brigham and Women's Hospital, Boston, Massachusetts 02215, USA.

The American Journal of Physiology
|July 1, 1996
PubMed
Summary
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Cytokines regulate CD1d expression on intestinal epithelial cells. Interferon-gamma (IFN-gamma) significantly increases CD1d mRNA and surface protein levels in these cells, impacting the intestinal immune microenvironment.

Area of Science:

  • Immunology
  • Gastroenterology
  • Cell Biology

Background:

  • Intestinal epithelial cells (IECs) interact closely with intestinal intraepithelial lymphocytes (iIELs).
  • CD1d is a molecule on IECs potentially interacting with iIELs.
  • Regulation of CD1d by cytokines in the intestinal environment is unknown.

Purpose of the Study:

  • To investigate the impact of cytokines on CD1d expression in IECs.
  • To determine if CD1d expression is regulated by cytokines at the mRNA and protein levels.

Main Methods:

  • Utilized whole cell enzyme-linked immunosorbent assay (ELISA) to detect CD1d on intestinal epithelial cell lines (T84, Caco-2, HT-29).
  • Exposed cell lines to human recombinant interferon-gamma (IFN-gamma).
  • Analyzed CD1d mRNA levels using polymerase chain reaction (PCR) amplification of cDNA.

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Main Results:

  • CD1d was detected on the surface of T84 intestinal epithelial cells.
  • IFN-gamma dose- and time-dependently increased CD1d surface expression and mRNA levels.
  • This effect was specific to IFN-gamma and observed in multiple IEC lines (T84, Caco-2, HT-29).
  • No significant surface expression of CD1a, CD1b, or CD1c was detected.

Conclusions:

  • CD1d expression on IECs is regulated by cytokines, similar to major histocompatibility complex (MHC) molecules.
  • IFN-gamma is a key regulator of CD1d expression in the intestinal epithelium.
  • Findings provide insights into IEC-lymphocyte interactions within the intestinal microenvironment.