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Related Concept Videos

Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which leads...
Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin01:26

Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin

Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
The binding of dantrolene to the RYR1...
Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
Myasthenia Gravis: Diagnostic Tests01:15

Myasthenia Gravis: Diagnostic Tests

Myasthenia gravis is an autoimmune condition affecting neuromuscular transmission, causing generalized weakness in skeletal muscles. Initial diagnoses rely on patients' signs, symptoms, and medical history. The challenge lies in distinguishing myasthenia from other muscular dystrophies. An important diagnostic feature is the significant improvement of symptoms after administering anticholinesterase inhibitors.
The edrophonium test is a diagnostic tool for myasthenia gravis. It involves...
Cholinergic Antagonists: Pharmacokinetics01:24

Cholinergic Antagonists: Pharmacokinetics

Cholinergic antagonists—such as antimuscarinics—are available in oral, topical, ocular, parenteral, and inhalational formulations. Most antimuscarinics are oral formulations,  while scopolamine is available as a topical patch, and ipratropium and tiotropium are available as inhalation aerosols or powders. Atropine, tropicamide, and cyclopentolate are topically instilled in the eye. Most antimuscarinics are lipid-soluble and readily absorbed from the gastrointestinal tract and the conjunctiva.

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Related Experiment Video

Updated: May 22, 2026

Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy
10:30

Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy

Published on: May 24, 2016

Non-Cyclic Rozanolixizumab Administration in Complex Generalized Myasthenia Gravis.

Marc Abi Aoun1, Diane Beauvais2, Marlène Barnay2

  • 1Neurology Department, Robert Boulin Hospital, Libourne, France.

Muscle & Nerve
|May 20, 2026
PubMed
Summary
This summary is machine-generated.

Fortnightly administration of rozanolixizumab improved generalized myasthenia gravis (gMG) symptoms and reduced hospitalizations in complex gMG patients. This non-cyclic regimen may prevent disease fluctuations associated with standard intermittent dosing.

Keywords:
FcRn inhibitionbiomarkersmyasthenia gravisrozanolixizumabsteroid‐sparing therapy

Related Experiment Videos

Last Updated: May 22, 2026

Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy
10:30

Multi-exon Skipping Using Cocktail Antisense Oligonucleotides in the Canine X-linked Muscular Dystrophy

Published on: May 24, 2016

Area of Science:

  • Neurology
  • Immunology
  • Pharmacology

Background:

  • Generalized myasthenia gravis (gMG) is an autoimmune disorder affecting neuromuscular junctions.
  • Rozanolixizumab, a neonatal Fc receptor (FcRn) inhibitor, treats refractory gMG.
  • The standard cyclic regimen may cause disease fluctuations and a "wearing-off" effect.

Purpose of the Study:

  • To evaluate the efficacy and safety of non-cyclic (fortnightly) rozanolixizumab administration.
  • To assess its impact on complex gMG patients refractory to standard treatments.
  • To investigate potential prevention of cyclical relapses.

Main Methods:

  • Retrospective study of eight anti-acetylcholine receptor antibody-positive complex gMG patients.
  • Patients transitioned to weekly or fortnightly rozanolixizumab after relapse.
  • Primary outcome: ≥2-point improvement in Myasthenia Gravis Activities of Daily Living (MG-ADL) score at 3 months; assessed clinical data and serum IgG levels.

Main Results:

  • Significant rapid improvement in MG-ADL scores from 10.8 to 4.1 within 3 months.
  • Reduced hospitalizations from 15.8 to 0 days/month; enabled corticosteroid tapering.
  • Mean serum IgG levels decreased by ~50% and stabilized; favorable safety profile with one discontinuation.

Conclusions:

  • Fortnightly rozanolixizumab demonstrated sustained clinical benefits in complex gMG.
  • This non-cyclic dosing strategy reduced hospitalizations and steroid dependence.
  • Further research is needed to confirm efficacy and long-term safety in larger cohorts.