Related Experiment Video

Updated: Aug 15, 2026

Ex Vivo Organotypic Corneal Model of Acute Epithelial Herpes Simplex Virus Type I Infection
07:55

Ex Vivo Organotypic Corneal Model of Acute Epithelial Herpes Simplex Virus Type I Infection

Published on: November 3, 2012

Regulation of HLA class II antigen expression on cultured corneal epithelium by interferon-gamma

M Iwata1, A Kiritoshi, M I Roat

  • 1Department of Ophthalmology, Eye and Ear Institute of Pittsburgh, PA 15213.

Investigative Ophthalmology & Visual Science
|August 1, 1992
PubMed

Insights

Recombinant human interferon gamma (IFN-gamma) induces HLA class II antigens on corneal epithelial cells. DQ antigen expression is linked to cell differentiation, suggesting differential regulation by IFN-gamma.

Area of Science:

  • Immunology
  • Cell Biology
  • Ophthalmology

Background:

  • Human corneal epithelial (HCE) cells are crucial for ocular health.
  • Understanding immune responses in the cornea is vital for treating inflammatory eye diseases.
  • Interferon gamma (IFN-gamma) is a key cytokine involved in immune regulation.

Purpose of the Study:

  • To investigate the effect of recombinant human interferon gamma (IFN-gamma) on HLA class II antigen expression in HCE cells.
  • To determine if IFN-gamma influences HLA class II antigen expression differently based on HCE cell differentiation.
  • To analyze the dose- and time-dependent effects of IFN-gamma on HLA-DR, -DP, and -DQ expression.

Main Methods:

  • Primary HCE cell cultures were established from limbal explants.
  • HCE cells at two differentiation stages (Stage 1 and Stage 2) were treated with varying concentrations of IFN-gamma (0-1000 U/ml) for 2-6 days.
  • Avidin-biotin peroxidase complex method was used for staining and detecting HLA class II antigens (HLA-DR, -DP, -DQ).

Main Results:

  • HLA class II antigens were not detected on untreated HCE cells.
  • IFN-gamma treatment induced HLA-DR, -DP, and -DQ expression in a dose- and time-dependent manner.
  • The level of induction varied, with DR > DP > DQ. DQ expression was significantly higher in Stage 2 (20%) compared to Stage 1 (5%) differentiated cells.

Conclusions:

  • IFN-gamma can independently regulate the induction of different HLA class II antigens on HCE cells.
  • The expression of DQ antigen on HCE cells is dependent on the level of cell differentiation.
  • These findings contribute to understanding corneal immune privilege and inflammatory responses.

More Related Videos

Murine Corneal Transplantation: A Model to Study the Most Common Form of Solid Organ Transplantation09:03

Murine Corneal Transplantation: A Model to Study the Most Common Form of Solid Organ Transplantation

Published on: November 17, 2014

Establishing a Severe Corneal Inflammation Model in Rats Based on Corneal Epithelium Curettage Combined with Corneal Sutures04:48

Establishing a Severe Corneal Inflammation Model in Rats Based on Corneal Epithelium Curettage Combined with Corneal Sutures

Published on: November 22, 2024

Related Concept Videos

Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
T Cell Activation and Clonal Selection01:22

T Cell Activation and Clonal Selection

T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
T Cell Types and Functions01:24

T Cell Types and Functions

When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...