The versatile Kv channels in the nervous system: actions beyond action potentials

Area of Science:

• Neuroscience
• Cell Biology
• Ion Channel Physiology

Background:

• Voltage-gated potassium (Kv) channels are crucial for repolarizing excitable cells.
• Recent research reveals Kv channels have functions beyond excitability control, including neurite formation and cell death.
• Some Kv channel functions are independent of potassium ion (K+) conduction, suggesting non-canonical roles.

Purpose of the Study:

• To review non-canonical functions of plasmalemmal Kv channels in neuronal and glial cells.
• To highlight Kv channel roles beyond shaping action potentials and immediate excitability control.
• To discuss similar Kv channel functions in other cell types where relevant.

Main Methods:

• Literature review of studies on voltage-gated potassium channels.
• Focus on research investigating Kv channel functions in neuronal and glial cell membranes.
• Inclusion of studies examining K+ conduction-independent Kv channel activities.

Main Results:

• Kv channels regulate neuronal exocytosis, neurite formation, and cell death.
• Kv channels influence astrocyte calcium (Ca2+) signaling and glial/glioma proliferation.
• Evidence supports non-canonical, K+ conduction-independent functions of Kv channels.

Conclusions:

• Kv channels possess diverse, non-canonical functions in the nervous system.
• These functions extend beyond excitability and involve critical cellular processes.
• Further research into non-canonical Kv channel roles is warranted for understanding neurological functions and diseases.