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@ARTICLE{Derkow:140085,
author = {Derkow, Katja and Rössling, Rosa and Schipke, Carola and
Krüger, Christina and Bauer, Jakob and Fähling, Michael
and Stroux, Andrea and Schott, Eckart and Ruprecht, Klemens
and Peters, Oliver and Lehnardt, Seija},
title = {{D}istinct expression of the neurotoxic micro{RNA} family
let-7 in the cerebrospinal fluid of patients with
{A}lzheimer's disease.},
journal = {PLOS ONE},
volume = {13},
number = {7},
issn = {1932-6203},
address = {San Francisco, California, US},
publisher = {PLOS},
reportid = {DZNE-2020-06407},
pages = {e0200602},
year = {2018},
abstract = {MicroRNAs (miRNAs) are non-coding RNAs originally involved
in RNA silencing and post-transcriptional regulation of gene
expression. We have shown in previous work that the miRNA
let-7b can act as a signalling molecule for Toll-like
receptor 7, thereby initiating innate immune pathways and
apoptosis in the central nervous system. Here, we
investigated whether different members of the miRNA family
let-7, abundantly expressed in the brain, are released into
the human cerebrospinal fluid (CSF) and whether quantitative
differences in let-7 copies exist in neurodegenerative
diseases. RNA isolated from CSF of patients with
Alzheimer´s disease (AD) and from control patients with
frontotemporal lobe dementia (FTLD), major depressive
episode (MDE) without clinical or neurobiological signs of
AD, and healthy individuals, was reverse transcribed with
primers against nine let-7 family members, and miRNAs were
quantified and analyzed comparatively by quantitative PCR.
let-7 miRNAs were present in CSF from patients with AD,
FTLD, MDE, and healthy controls. However, the amount of
individual let-7 miRNAs in the CSF varied substantially. CSF
from AD patients contained higher amounts of let-7b and
let-7e compared to healthy controls, while no differences
were observed regarding the other let-7 miRNAs. No increase
in let-7b and let-7e was detected in CSF from FTLD patients,
while in CSF from MDE patients, let-7b and let-7e copy
levels were elevated. In CSF from AD patients, let-7b and
let-7e were associated with extracellular vesicles. let-7
family members present in the CSF mediated neurotoxicity in
vitro, albeit to a variable extent. Taken together,
neurotoxic let-7 miRNAs are differentially and specifically
released in AD, but also in MDE patients. Thus, these miRNAs
may mirror common neuropathological paths and by this serve
to unscramble mechanisms of different neurodegenerative
diseases.},
keywords = {Aged / Aged, 80 and over / Alzheimer Disease: cerebrospinal
fluid / Cell-Derived Microparticles: metabolism / Depressive
Disorder, Major: cerebrospinal fluid / Female /
Frontotemporal Dementia: cerebrospinal fluid / Gene
Expression Regulation / Humans / Male / MicroRNAs:
cerebrospinal fluid / Middle Aged / MicroRNAs (NLM
Chemicals) / mirnlet7 microRNA, human (NLM Chemicals)},
cin = {AG Endres},
ddc = {610},
cid = {I:(DE-2719)1811005},
pnm = {344 - Clinical and Health Care Research (POF3-344)},
pid = {G:(DE-HGF)POF3-344},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30011310},
pmc = {pmc:PMC6047809},
doi = {10.1371/journal.pone.0200602},
url = {https://pub.dzne.de/record/140085},
}