Affordable Access

deepdyve-link deepdyve-link
Publisher Website

Trafficking highways to the intercalated disc: new insights unlocking the specificity of connexin 43 localization.

Authors
  • Zhang, Shan-Shan
  • Shaw, Robin M
Type
Published Article
Journal
Cell communication & adhesion
Publication Date
Feb 01, 2014
Volume
21
Issue
1
Pages
43–54
Identifiers
DOI: 10.3109/15419061.2013.876014
PMID: 24460200
Source
Medline
License
Unknown

Abstract

With each heartbeat, billions of cardiomyocytes work in concert to propagate the electrical excitation needed to effectively circulate blood. Regulated expression and timely delivery of connexin proteins to form gap junctions at the specialized cell-cell contact region, known as the intercalated disc, is essential to ventricular cardiomyocyte coupling. We focus this review on several regulatory mechanisms that have been recently found to govern the lifecycle of connexin 43 (Cx43), the short-lived and most abundantly expressed connexin in cardiac ventricular muscle. The Cx43 lifecycle begins with gene expression, followed by oligomerization into hexameric channels, and then cytoskeletal-based transport toward the disc region. Once delivered, hemichannels interact with resident disc proteins and are organized to effect intercellular coupling. We highlight recent studies exploring regulation of Cx43 localization to the intercalated disc, with emphasis on alternatively translated Cx43 isoforms and cytoskeletal transport machinery that together regulate Cx43 gap junction coupling between cardiomyocytes.

Report this publication

Statistics

Seen <100 times