Related Experiment Video

Updated: Aug 13, 2026

Expansion of Human Peripheral Blood γδ T Cells using Zoledronate
13:08

Expansion of Human Peripheral Blood γδ T Cells using Zoledronate

Published on: September 9, 2011

Interferon-gamma induces high-affinity transforming growth factor-beta receptor expression on human corneal

A Abrahamian1, M S Xi, J H Rockey

  • 1Department of Ophthalmology, Scheie Eye Institute, School of Medicine, University of Pennsylvania, Philadelphia 19104.

Current Eye Research
|March 1, 1994
PubMed

Insights

Interferon-gamma (IFN-gamma) treatment upregulates higher affinity transforming growth factor-beta (TGF-beta) receptors on corneal fibroblasts. This may enhance corneal immune protection and maintain vision clarity.

Area of Science:

  • Ophthalmology
  • Immunology
  • Cell Biology

Background:

  • Corneal stromal fibroblasts play a role in maintaining corneal transparency and immune privilege.
  • Transforming growth factor-beta (TGF-beta) signaling is crucial for corneal homeostasis.
  • Interferon-gamma (IFN-gamma) is an immune cytokine with known effects on cellular responses.

Purpose of the Study:

  • To investigate the effect of IFN-gamma on TGF-beta receptor expression in human corneal stromal fibroblasts.
  • To determine if IFN-gamma alters the affinity of TGF-beta receptors on these cells.

Main Methods:

  • Cultured human corneal stromal fibroblasts were treated with IFN-gamma.
  • Scatchard analysis was used to quantify TGF-beta 1 binding and receptor affinity.
  • Association constants for TGF-beta receptors were calculated.

Main Results:

  • Corneal fibroblasts expressed TGF-beta receptors with an association constant of 6 x 10^8 M^-1 before and after IFN-gamma treatment.
  • A population of higher affinity TGF-beta receptors (association constant of 4 x 10^12 M^-1) was detected exclusively in IFN-gamma-treated cells.
  • IFN-gamma treatment led to the upregulation of high-affinity TGF-beta receptors.

Conclusions:

  • IFN-gamma upregulates higher affinity TGF-beta receptors on corneal stromal fibroblasts.
  • This upregulation may represent a compensatory mechanism to maintain corneal optical function and immunoseclusion.
  • The observed changes suggest a role for IFN-gamma in modulating corneal fibroblast responses to TGF-beta, potentially impacting corneal immune privilege.

More Related Videos

Experimental Infection with Listeria monocytogenes as a Model for Studying Host Interferon-γ Responses10:10

Experimental Infection with Listeria monocytogenes as a Model for Studying Host Interferon-γ Responses

Published on: November 16, 2016

A Human Corneal Organ Culture Model of Descemet's Stripping Only with Accelerated Healing Stimulated by Engineered Fibroblast Growth Factor 112:36

A Human Corneal Organ Culture Model of Descemet's Stripping Only with Accelerated Healing Stimulated by Engineered Fibroblast Growth Factor 1

Published on: July 22, 2022

Related Concept Videos

Transcytosis of IgG01:15

Transcytosis of IgG

Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
IgG molecules from a mother undergo transcytosis starting around 13 weeks of gestation. The amount of IgG transferred and entering the fetal blood circulation increases with...
TGF - β Signaling Pathway01:16

TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...