Cardiac copper deficiency activates a systemic signaling mechanism that communicates with the copper acquisition and storage organs.

Published

Journal Article

Copper (Cu) is an essential cofactor for a variety of metabolic functions, and the regulation of systemic Cu metabolism is critical to human health. Dietary Cu is absorbed through the intestine, stored in the liver, and mobilized into the circulation; however, systemic Cu homeostasis is poorly understood. We generated mice with a cardiac-specific knockout of the Ctr1 Cu transporter (Ctr1(hrt/hrt)), resulting in cardiac Cu deficiency and severe cardiomyopathy. Unexpectedly, Ctr1(hrt/hrt) mice exhibited increased serum Cu levels and a concomitant decrease in hepatic Cu stores. Expression of the ATP7A Cu exporter, thought to function predominantly in intestinal Cu acquisition, was strongly increased in liver and intestine of Ctr1(hrt/hrt) mice. These studies identify ATP7A as a candidate for hepatic Cu mobilization in response to peripheral tissue demand, and illuminate a systemic regulation in which the Cu status of the heart is signaled to organs that take up and store Cu.

Full Text

Duke Authors

Cited Authors

  • Kim, B-E; Turski, ML; Nose, Y; Casad, M; Rockman, HA; Thiele, DJ

Published Date

  • May 2010

Published In

Volume / Issue

  • 11 / 5

Start / End Page

  • 353 - 363

PubMed ID

  • 20444417

Pubmed Central ID

  • 20444417

Electronic International Standard Serial Number (EISSN)

  • 1932-7420

International Standard Serial Number (ISSN)

  • 1550-4131

Digital Object Identifier (DOI)

  • 10.1016/j.cmet.2010.04.003

Language

  • eng