Related Experiment Video

Updated: Aug 8, 2026

Determining Immune System Suppression versus CNS Protection for Pharmacological Interventions in Autoimmune Demyelination
09:38

Determining Immune System Suppression versus CNS Protection for Pharmacological Interventions in Autoimmune Demyelination

Published on: September 12, 2016

Interferon-beta counteracts inflammatory mediator-induced effects on brain endothelial cell tight junction

Poonam A Kuruganti1, Julian R Hinojoza, Mary Jane Eaton

  • 1Department of Pathology, Stanford University School of Medicine, California 94305, USA.

Journal of Neuropathology and Experimental Neurology
|August 3, 2002
PubMed

Insights

Interferon-beta (IFN-beta) may protect the brain

Area of Science:

  • Neuroimmunology
  • Cell Biology
  • Endothelial Cell Biology

Background:

  • Endothelial cell (EC) dysfunction is implicated in central nervous system (CNS) inflammation in multiple sclerosis (MS).
  • Interferon-beta (IFN-beta) is a therapeutic agent in MS, but its precise mechanisms of action on CNS ECs are not fully understood.
  • Tight junction proteins like zonula occludens-1 (ZO-1) and -2 (ZO-2) are critical for maintaining EC barrier integrity.

Purpose of the Study:

  • To investigate the effects of inflammatory mediators on EC tight junction molecules in human brain ECs.
  • To determine the impact of IFN-beta on these inflammatory effects.
  • To correlate in vitro findings with EC alterations observed in active MS lesions.

Main Methods:

  • Cultured human brain ECs were treated with hydrogen peroxide (H2O2), tumor necrosis factor-beta, and interferon-gamma (IFN-gamma).
  • Intracellular localization of ZO-1 and ZO-2 was analyzed using microscopy.
  • Effects of co-treatments and IFN-beta were assessed.
  • EC tight junction protein localization was examined in control white matter and active MS lesions.

Main Results:

  • H2O2 induced reversible translocation of ZO-1 and ZO-2 from cell borders to the cytoplasm and EC retraction, without cytotoxicity.
  • Tumor necrosis factor-beta mimicked H2O2 effects, while IFN-gamma did not.
  • IFN-beta reversed the H2O2-induced alterations in ZO-1 and ZO-2 localization.
  • In vitro findings mirrored EC ZO-1 distribution observed in active MS lesions.

Conclusions:

  • Inflammatory mediators disrupt EC tight junction integrity, mimicking changes seen in active MS.
  • IFN-beta treatment may counteract these inflammatory effects on CNS ECs.
  • IFN-beta treatment has the potential to preserve EC barrier function in MS patients.

More Related Videos

Visualizing Impairment of the Endothelial and Glial Barriers of the Neurovascular Unit during Experimental Autoimmune Encephalomyelitis In Vivo10:50

Visualizing Impairment of the Endothelial and Glial Barriers of the Neurovascular Unit during Experimental Autoimmune Encephalomyelitis In Vivo

Published on: March 26, 2019

Reconstruction of the Blood-Brain Barrier In Vitro to Model and Therapeutically Target Neurological Disease06:19

Reconstruction of the Blood-Brain Barrier In Vitro to Model and Therapeutically Target Neurological Disease

Published on: October 20, 2023

Related Concept Videos

The Blood-brain Barrier00:49

The Blood-brain Barrier

Overview
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...
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...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...