MicroRNA expression in Alzheimer blood mononuclear cells.


Journal Article

Various coding genes representing multiple functional categories are downregulated in blood mononuclear cells (BMC) of patients with sporadic Alzheimer disease (AD). Noncoding microRNAs (miRNA) regulate gene expression by degrading messages or inhibiting translation. Using BMC as a paradigm for the study of systemic alterations in AD, we investigated whether peripheral miRNA expression is altered in this condition. MicroRNA levels were assessed using the microRNA microarray (MMChip) containing 462 human miRNA, and the results validated by real time PCR. Sixteen AD patients and sixteen normal elderly controls (NEC) were matched for ethnicity, age, gender and education. The expression of several BMC miRNAs was found to increase in AD relative to NEC levels, and may differ between AD subjects bearing one or two APOE4 alleles. As compared to NEC, miRNAs significantly upregulated in AD subjects and confirmed by qPCR were miR-34a and 181b. Predicted target genes downregulated in Alzheimer BMC that correlated with the upregulated miRNAs were largely represented in the functional categories of Transcription/Translation and Synaptic Activity. Several miRNAs targeting the same genes were within the functional category of Injury response/Redox homeostasis. Taken together, induction of microRNA expression in BMC may contribute to the aberrant systemic decline in mRNA levels in sporadic AD.

Full Text

Duke Authors

Cited Authors

  • Schipper, HM; Maes, OC; Chertkow, HM; Wang, E

Published Date

  • December 20, 2007

Published In

Volume / Issue

  • 1 /

Start / End Page

  • 263 - 274

PubMed ID

  • 19936094

Pubmed Central ID

  • 19936094

Electronic International Standard Serial Number (EISSN)

  • 1177-6250

International Standard Serial Number (ISSN)

  • 1177-6250


  • eng