Purine metabolism gene deregulation in Parkinson's disease.

Abstract:

AIMS:To explore alterations in the expression of genes encoding enzymes involved in purine metabolism in Parkinson's disease (PD) brains as purines are the core of the DNA, RNA, nucleosides and nucleotides which participate in a wide variety of crucial metabolic pathways. METHODS:Analysis of mRNA using real-time quantitative PCR of 22 genes involved in purine metabolism in the substantia nigra, putamen and cerebral cortex area 8 in PD at different stages of disease progression, and localization of selected purine metabolism-related enzymes with immunohistochemistry. RESULTS:Reduced expression of adenylate kinase 2 (AKA2), AK3, AK4, adenine phosphoribosyltransferase, ectonucleoside triphosphate diphosphohydrolase 1 (ENTPD1), ENTPD3, nonmetastatic cells 3, nucleoside-diphosphatese kinase 3 (NME1), NME7 and purine nucleoside phosphorylase 1 (PNP1) mRNA in the substantia nigra at stages 3-6; up-regulation of ADA mRNA in the frontal cortex area 8 at stages 3-4 and of AK1, AK5, NME4, NME5, NME6, 5'-nucleotidase (NT5E), PNP1 and prune homolog Drosophila at stages 5-6. There is no modification in the expression of these genes in the putamen at stages 3-5. CONCLUSIONS:Gene down-regulation in the substantia nigra may be interpreted as a consequence of dopaminergic cell death as ENTPD3, NME1, NME7, AK1 and PNP1 are mainly expressed in neurons. Yet ENTPD1 and NT5E, also down-regulated in the substantia nigra, are expressed in astrocytes, probably pericytes and microglia, respectively. In contrast, gene up-regulation in the frontal cortex area 8 at advanced stages of the disease suggests a primary manifestation or a compensation of altered purine metabolism in this region.

authors

Garcia-Esparcia P,Hernández-Ortega K,Ansoleaga B,Carmona M,Ferrer I

doi

10.1111/nan.12221

subject

Has Abstract

pub_date

2015-12-01 00:00:00

pages

926-40

issue

7

eissn

0305-1846

issn

1365-2990

journal_volume

41

pub_type

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