Interactions of peptide amidation and copper: novel biomarkers and mechanisms of neural dysfunction.

Journal Article

Mammalian genomes encode only a small number of cuproenzymes. The many genes involved in coordinating copper uptake, distribution, storage and efflux make gene/nutrient interactions especially important for these cuproenzymes. Copper deficiency and copper excess both disrupt neural function. Using mice heterozygous for peptidylglycine alpha-amidating monooxygenase (PAM), a cuproenzyme essential for the synthesis of many neuropeptides, we identified alterations in anxiety-like behavior, thermoregulation and seizure sensitivity. Dietary copper supplementation reversed a subset of these deficits. Wildtype mice maintained on a marginally copper-deficient diet exhibited some of the same deficits observed in PAM(+/-) mice and displayed alterations in PAM metabolism. Altered copper homeostasis in PAM(+/-) mice suggested a role for PAM in the cell type specific regulation of copper metabolism. Physiological functions sensitive to genetic limitations of PAM that are reversed by supplemental copper and mimicked by copper deficiency may serve as indicators of marginal copper deficiency.

Full Text

Duke Authors

Cited Authors

  • Bousquet-Moore, D; Prohaska, JR; Nillni, EA; Czyzyk, T; Wetsel, WC; Mains, RE; Eipper, BA

Published Date

  • January 2010

Published In

Volume / Issue

  • 37 / 1

Start / End Page

  • 130 - 140

PubMed ID

  • 19815072

Electronic International Standard Serial Number (EISSN)

  • 1095-953X

Digital Object Identifier (DOI)

  • 10.1016/j.nbd.2009.09.016

Language

  • eng

Conference Location

  • United States