How Mefloquine and 2-APB Block Connexin Channels
Author Information
Author(s): Lavriha Pia, Han Yufei, Ding Xinyue, Schuster Dina, Qi Chao, Vaithia Anand, Picotti Paola, Korkhov Volodymyr M.
Primary Institution: Paul Scherrer Institute, Villigen, Switzerland
Hypothesis
The study investigates the molecular mechanisms by which mefloquine and 2-aminoethoxydiphenyl borate inhibit connexin gap junction channels.
Conclusion
Mefloquine and 2-APB inhibit connexin channels by binding to distinct sites, affecting their permeability and electrostatic properties.
Supporting Evidence
- Mefloquine and 2-APB were shown to bind to Cx32 and block dye permeation.
- Cryo-EM analysis revealed distinct binding sites for both drugs.
- Mutagenesis studies indicated that specific residues are critical for drug sensitivity.
- Both drugs were tested in functional assays to confirm their inhibitory effects.
Takeaway
This study shows how two drugs can block communication between cells by binding to specific parts of the channels that connect them.
Methodology
The study used cryo-EM, dye uptake assays, and mutagenesis to analyze the binding and effects of mefloquine and 2-APB on connexin channels.
Limitations
The study does not fully rule out the influence of other hemichannels on the observed effects.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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