[Potassium channelopathies and Morvan's syndromes]

Area of Science:

• Neuroscience
• Molecular Biology
• Genetics

Context:

• Morvan's disease and syndrome are increasingly recognized neurological disorders.
• Potassium channels play a critical role in neuronal function, particularly in repolarization and gating mechanisms.
• Dysregulation of potassium homeostasis can lead to neuronal hyperexcitability and associated channelopathies.

Purpose:

• To review the growing interest in Morvan's disease and its connection to potassium channelopathies.
• To elucidate the role of different potassium channel families (VGKC, Kir, K2p) in neurological and cardiac conditions.
• To highlight specific channelopathies, their genetic basis, and associated clinical manifestations.

Summary:

• Potassium channelopathies, disorders affecting potassium channels, are implicated in Morvan's syndrome and other neurological conditions.
• Voltage-gated potassium channels (VGKCs) are frequently involved, particularly Shaker-related channels linked to neuromyotonia and limbic encephalitis.
• Mutations in various potassium channel genes (KCNQ, KCNJ) cause diverse syndromes like long QT syndrome, benign familial neonatal seizures, DEND syndrome, and Andersen's syndrome.

Impact:

• Provides a comprehensive overview of potassium channelopathies and their clinical relevance.
• Enhances understanding of the molecular basis of neurological and cardiac channelopathies.
• Facilitates diagnosis and potential therapeutic strategies for patients with these conditions.