CCS and SOD1 mRNA are reduced after copper supplementation in peripheral mononuclear cells of individuals with high serum ceruloplasmin concentration

Suazo M.; Olivares, F; Mendez, MA; Pulgar, R; Prohaska, JR; Arredondo M.; Pizarro, F; Olivares M.; Araya M.; Gonzalez, M.

Abstract

The limits of copper homeostatic regulation in humans are not known, making it difficult to define the milder effects of early copper excess. Furthermore, a robust assay to facilitate the detection of early stages of copper excess is needed. To address these issues, we assessed changes in relative mRNA abundance of methallothionein 2A (MT2A), prion (PrP), amyloid precursor-like protein 2 (APLP2), Cu/Zn superoxide dismutase (SOD1) and its copper chaperone (CCS) in peripheral mononuclear cells (PMNCs) from healthy adults representing the 5% highest and lowest extremes in the distribution curve of serum ceruloplasmin (Cp) concentrations of 800 individuals. The intracellular Cu content was also determined. PMNCs were isolated from individuals before and after exposure to a single daily dose of 10 mg Cu (as CuSO 4) for 2 months. Results showed that although there were fluctuations in serum Cp values of the samples assessed before copper exposure, no significant differences were observed in cell copper content or in the relative abundance of MT2A, PrP and APLP2 transcripts in PMNCs. Also, these values were not modified after copper supplementation. However, CCS and SOD1 mRNA levels were reduced in PMNCs after copper supplementation in the individuals with the high Cp values, suggesting that they should be further explored as biomarkers of moderate copper overload in humans. © 2008 Elsevier Inc. All rights reserved.

Más información

Título según WOS: CCS and SOD1 mRNA are reduced after copper supplementation in peripheral mononuclear cells of individuals with high serum ceruloplasmin concentration
Título según SCOPUS: CCS and SOD1 mRNA are reduced after copper supplementation in peripheral mononuclear cells of individuals with high serum ceruloplasmin concentration
Título de la Revista: JOURNAL OF NUTRITIONAL BIOCHEMISTRY
Volumen: 19
Número: 4
Editorial: Elsevier
Fecha de publicación: 2008
Página de inicio: 269
Página final: 274
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0955286307001180
DOI:

10.1016/j.jnutbio.2007.04.003

Notas: ISI, SCOPUS