PKCμ promotes keratinocyte cell migration through Cx43 phosphorylation-mediated suppression of intercellular communication.

ABSTRACT: Downregulation of intercellular communication through suppression of gap junctional conductance is necessary during wound healing. Connexin 43 (Cx43), a prominent gap junction protein in skin, is downregulated following wounding to restrict communication between keratinocytes. Previous studies found that PKCμ, a novel PKC isozyme, regulates efficient cutaneous wound healing. However, the molecular mechanism by which PKCμ regulates wound healing remains unknown. We have identified that PKCμ suppresses intercellular communication and enhances cell migration in an in vitro wound healing model by regulating Cx43 containing gap junctions. PKCμ can directly interact with and phosphorylate Cx43 at S368, which leads to Cx43 internalization and downregulation. Finally, utilizing phosphomimet

SUBMITTER: Pun R 

PROVIDER: S-EPMC10875573 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature