Diminuição da expressão dos genes APP e CP em doentes de Alzheimer sugere alteração da exportação de ferro celular nesta demência

Translated title of the contribution: Decrease in APP and CP mRNA expression in Alzheimer’s disease patients suggests impairment of cellular iron export in this dementia

Cláudia Guerreiro, Bruno Silva, Ângela C. Crespo, Liliana Marques, Sónia Costa, Ângela Timóteo, Erica Marcelino, Carolina Maruta, Arminda Vilares, Mafalda Matos, Frederico Simões do Couto, Paula Faustino, Ana Verdelho, Manuela Guerreiro, Ana Herrero, Cristina Costa, Alexandre de Mendonça, Madalena Martins, Luciana Costa*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A dysregulation of iron (Fe) metabolism in Alzheimer’s disease (AD) has been suggested previously. Herein, we intended to further clarify the molecular mechanisms underlying Fe homeostasis in AD particularly at the level of cellular iron efflux. Thus, the expression of specific Femetabolism-related genes directly involved in Fe regulation and export was assessed by quantitative PCR in peripheral blood mononuclear cells (PBMCs) from 73 AD patients and 74 controls. A significant decrease in the expression of aconitase 1 (ACO1; P=0.007); ceruloplasmin (CP;P<0.001) and amyloid peptide precursor (APP; P=0.006) genes was fund in AD patients compared with healthy volunteers. These observations point out to a significant down regulation of the expression of genes associated with ferroportin-mediated cellular Fe export in PBMCs from AD patients. The present findings support previous studies suggesting impairment of Fe homeostasis in AD, which may lead to cellular Fe retention and oxidative stress, a typical feature of this disease.
Translated title of the contributionDecrease in APP and CP mRNA expression in Alzheimer’s disease patients suggests impairment of cellular iron export in this dementia
Original languagePortuguese
Pages (from-to)53-56
Number of pages4
JournalBoletim Epidemiológico Observações
Volume5
Issue number16
Publication statusPublished - May 2016
Externally publishedYes

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