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Curr Osteoporos Rep. 2017 Feb;15(1):24-31. doi: 10.1007/s11914-017-0345-4.

Connexin43 and the Intercellular Signaling Network Regulating Skeletal Remodeling.

Author information

1
Department of Orthopaedics, University of Maryland School of Medicine, 100 Penn Street, Allied Health Building, Room 540E, Baltimore, MD, 21201, USA.
2
Department of Orthopaedics, University of Maryland School of Medicine, 100 Penn Street, Allied Health Building, Room 540E, Baltimore, MD, 21201, USA. jstains@som.umaryland.edu.

Abstract

PURPOSE OF THE REVIEW:

This review highlights recent developments into how intercellular communication through connexin43 facilitates bone modeling and remodeling.

RECENT FINDINGS:

Connexin43 is required for both skeletal development and maintenance, particularly in cortical bone, where it carries out multiple functions, including preventing osteoclastogenesis, restraining osteoprogenitor proliferation, promoting osteoblast differentiation, coordinating organized collagen matrix deposition, and maintaining osteocyte survival. Emerging data shows that connexin43 regulates both the exchange of small molecules among osteoblast lineage cells and the docking of signaling proteins to the gap junction, affecting the efficiency of signal transduction. Understanding how and what connexin43 communicates to coordinate tissue remodeling has therapeutic implications in bone. Altering the information shared by intercellular communication and/or targeting the recruitment of signaling machinery to the gap junction could be used to impact the skeletal homeostatic set point, either driving osteogenesis or inhibiting resorption.

KEYWORDS:

Connexin; Intercellular communication; Osteoblast; Osteocyte; Signal transduction

PMID:
28181063
PMCID:
PMC5332069
DOI:
10.1007/s11914-017-0345-4
[Indexed for MEDLINE]
Free PMC Article

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