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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
Angle Closure Glaucoma: Treatment01:28

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...
Multiple Sclerosis l: Introduction01:19

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Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...

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Related Experiment Video

Updated: Jul 7, 2026

Induction of Paralysis and Visual System Injury in Mice by T Cells Specific for Neuromyelitis Optica Autoantigen Aquaporin-4
09:29

Induction of Paralysis and Visual System Injury in Mice by T Cells Specific for Neuromyelitis Optica Autoantigen Aquaporin-4

Published on: August 21, 2017

Neuromyelitis optica: a new perspective.

Sean J Pittock1

  • 1Department of Neurology, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota 55905, USA. pittock.sean@mayo.edu

Seminars in Neurology
|February 8, 2008
PubMed
Summary
This summary is machine-generated.

Neuromyelitis optica (NMO) is now understood as a spectrum of disorders, not just a single event. The discovery of NMO-immunoglobulin (Ig)G targeting aquaporin-4 aids in diagnosing and understanding this condition.

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Last Updated: Jul 7, 2026

Induction of Paralysis and Visual System Injury in Mice by T Cells Specific for Neuromyelitis Optica Autoantigen Aquaporin-4
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Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
12:23

Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients

Published on: April 14, 2014

Area of Science:

  • Neuroimmunology
  • Central Nervous System Inflammatory Disorders
  • Demyelinating Diseases

Background:

  • The traditional view of neuromyelitis optica (NMO) as a singular inflammatory event affecting the optic nerves and spinal cord is evolving.
  • Recent clinical, radiological, pathological, and serological data suggest NMO represents a broader spectrum of disease, distinct from multiple sclerosis.

Purpose of the Study:

  • To explore the expanding understanding of neuromyelitis optica (NMO) as a spectrum of disorders.
  • To highlight the significance of neuromyelitis optica-immunoglobulin (Ig)G as a diagnostic marker and its implications for understanding NMO pathogenesis.

Main Methods:

  • Review of clinical, radiological, pathological, and serological findings.
  • Identification and characterization of neuromyelitis optica-immunoglobulin (Ig)G and its target antigen, aquaporin-4.
  • Analysis of preliminary in vitro studies and immunopathological evidence.

Main Results:

  • Neuromyelitis optica-immunoglobulin (Ig)G is a sensitive and specific marker for NMO, distinguishing it from multiple sclerosis.
  • Aquaporin-4, the target of NMO-IgG, is a key player in the central nervous system's water channels.
  • NMO-IgG presence in patients with optic neuritis or myelitis can predict relapses, supporting the NMO spectrum concept.

Conclusions:

  • Neuromyelitis optica (NMO) is recognized as a spectrum of inflammatory central nervous system disorders.
  • Neuromyelitis optica-immunoglobulin (Ig)G is crucial for diagnosis and understanding NMO pathogenesis, targeting aquaporin-4.
  • Further research, including animal models, is needed to confirm NMO-IgG's role and develop targeted therapies.