Voltage-dependent conformational changes of Kv1.3 channels activate cell proliferation
Pilar Cidad1,2, Esperanza Alonso1,2, Marycarmen Arévalo-Martínez1,2
1Departamento de Bioquímica y Biología Molecular y Fisiología, Universidad de Valladolid, Valladolid, Spain.
Journal of Cellular Physiology
|November 24, 2020
Summary
Voltage-dependent potassium channel Kv1.3 (potassium channel Kv1.3) transitions activate cell proliferation pathways. Kv1.3 interacts with IQGAP3, a protein crucial for proliferation, especially when the cell membrane is depolarized.
Area of Science:
- Cellular and Molecular Biology
- Ion Channel Physiology
- Cancer Biology
Background:
- Voltage-dependent potassium channel Kv1.3 (potassium channel Kv1.3) is linked to cell proliferation.
- Mechanisms underlying Kv1.3's role in proliferation are not fully understood.
- Kv1.3 may influence proliferation via ion flux-dependent or independent pathways.
Purpose of the Study:
- Investigate the link between Kv1.3 voltage-dependent dynamics and cell cycle progression.
- Elucidate the molecular mechanisms of Kv1.3-induced proliferation.
- Identify novel Kv1.3 interacting partners involved in proliferation.
Main Methods:
- Utilized transfected HEK cells and vascular smooth muscle cells.
- Analyzed the impact of membrane potential on Kv1.3-induced proliferation.
- Studied mutated Kv1.3 channels with altered voltage-dependent gating.
- Investigated Kv1.3 interaction with scaffold protein IQGAP3.
Main Results:
- Voltage-dependent transitions of Kv1.3 channels activate proliferative pathways.
- Kv1.3 associates with IQGAP3, a proliferation-related scaffold protein.
- Membrane depolarization enhances the Kv1.3-IQGAP3 interaction, promoting proliferation.
Conclusions:
- Kv1.3 voltage-dependent conformational changes are essential for proliferation.
- The Kv1.3-IQGAP3 interplay is a key mechanism in Kv1.3-induced cell proliferation.
- Targeting Kv1.3 and its interactions may offer therapeutic strategies for proliferative diseases.
Keywords:
IQGAP3Kv1.3 channelsVascular smooth muscle cellscell cyclecell proliferationmembrane potentialMore Related Videos
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