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Connexin43 Hemichannel (Cx43)
- Target
- Cx43
- Molecular classification
- Connexin, Gap junction channel, Hemichannel
01
Overview
Connexin43 (Cx43), encoded by the GJA1 gene, is a member of the connexin family of proteins that form gap junction channels and hemichannels in vertebrate cells. Cx43 is one of the most widely expressed and studied connexins, playing critical roles in intercellular communication across various tissues, including heart, bone, skin, and nervous system. It mediates direct cytoplasmic exchange between neighboring cells via gap junctions and allows communication between the cell interior and extracellular environment via hemichannels. Dysregulation of Cx43 is implicated in various diseases, making it a drug target for cancer therapy, wound healing modulation, cardiac arrhythmia prevention/treatment, and eye injury/inflammation management.
- Other names
- Connexin 43GJA1
02
Mechanism of action
Modulation of channel opening/closing, altering intercellular communication, affecting ion and metabolite flux.
03
Biological functions
Electrical couplingMetabolic couplingIntercellular communicationMechanotransductionRegulation of cell migrationRegulation of cell proliferation
04
Disease associations
Oculodentodigital dysplasia (ODDD)Hypoplastic left heart syndromeHallermann-Streiff syndromeAtrioventricular septal defectCardiac arrhythmiasCancerImpaired wound healing
05
Safety considerations
Potential for off-target effects due to wide expressionComplexity of gating mechanisms makes specific targeting challenging
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