Meta-analysis of serum non-ceruloplasmin copper in Alzheimer's disease

Rosanna Squitti, Ilaria Simonelli, Mariacarla Ventriglia, Mariacristina Siotto, Patrizio Pasqualetti, Alan Rembach, James Doecke, Ashley I. Bush

Research output: Contribution to journalArticlepeer-review

Abstract

The fraction of copper not bound to ceruloplasmin seems altered in Alzheimer's disease (AD). We have addressed this notion evaluating all the studies carried out from 1996 until March 2013 by means of meta-analysis. We performed our analysis on diverse indices evaluating the relationship between copper and ceruloplasmin in general circulation, namely 'Non-Cp copper', '% Non-Cp copper', and 'Adjusted copper'. For Non-Cp copper and % Non-Cp copper, the correct stoichiometry between copper and ceruloplasmin (6-8 atoms of copper for each ceruloplasmin molecule) in healthy controls has been adopted as criterion for the study to be included in the meta-analysis evaluating data with the canonic Walshe's formula for Non-Cp copper. Copper to ceruloplasmin ratio (Cu:Cp), which is an internal quality control check for ceruloplasmin calibration, was used as an index of the actual stoichiometry in the specimens. Adjusted (Adj-Cp) copper, even though less reliable, was calculated, allowing the evaluation of all the studies selected. An additional meta-analysis of systemic total copper was re-calculated accounting for all the studies carried out from 1983 to March 2013. Ten studies were analyzed in the meta-analysis for Non-Cp copper and % Non-Cp copper reaching a pooled total of 599 AD subjects and 867 controls. For Adj-Cp copper, 14 studies were analyzed with a pooled total of 879 AD and 1,712 controls. 27 studies were considered for systemic total copper meta-analysis, with a pooled total of 1,393 AD and 2,159 controls. All the copper indices analyzed were significantly higher in AD subjects compared to healthy controls.

Original languageEnglish
Pages (from-to)809-822
Number of pages14
JournalJournal of Alzheimer's Disease
Volume38
Issue number4
DOIs
Publication statusPublished - 2014

Keywords

  • Alzheimer's disease
  • Ceruloplasmin
  • Copper
  • Metal
  • Plasma
  • Serum

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Geriatrics and Gerontology
  • Clinical Psychology

Fingerprint Dive into the research topics of 'Meta-analysis of serum non-ceruloplasmin copper in Alzheimer's disease'. Together they form a unique fingerprint.

Cite this