TY - JOUR
T1 - Meta-analyses identify differentially expressed micrornas in Parkinson's disease
AU - Schulz, Jessica
AU - Takousis, Petros
AU - Wohlers, Inken
AU - Itua, Ivie O.G.
AU - Dobricic, Valerija
AU - Rücker, Gerta
AU - Binder, Harald
AU - Middleton, Lefkos
AU - Ioannidis, John P.A.
AU - Perneczky, Robert
AU - Bertram, Lars
AU - Lill, Christina M.
PY - 2019/6
Y1 - 2019/6
N2 - Objective: MicroRNA (miRNA)-mediated (dys)regulation of gene expression has been implicated in Parkinson's disease (PD), although results of miRNA expression studies remain inconclusive. We aimed to identify miRNAs that show consistent differential expression across all published expression studies in PD. Methods: We performed a systematic literature search on miRNA expression studies in PD and extracted data from eligible publications. After stratification for brain, blood, and cerebrospinal fluid (CSF)-derived specimen, we performed meta-analyses across miRNAs assessed in three or more independent data sets. Meta-analyses were performed using effect-size– and p-value–based methods, as applicable. Results: After screening 599 publications, we identified 47 data sets eligible for meta-analysis. On these, we performed 160 meta-analyses on miRNAs quantified in brain (n = 125), blood (n = 31), or CSF (n = 4). Twenty-one meta-analyses were performed using effect sizes. We identified 13 significantly (Bonferroni-adjusted α = 3.13 × 10–4) differentially expressed miRNAs in brain (n = 3) and blood (n = 10) with consistent effect directions across studies. The most compelling findings were with hsa-miR-132-3p (p = 6.37 × 10–5), hsa-miR-497-5p (p = 1.35 × 10–4), and hsa-miR-133b (p = 1.90 × 10–4) in brain and with hsa-miR-221-3p (p = 4.49 × 10–35), hsa-miR-214-3p (p = 2.00 × 10–34), and hsa-miR-29c-3p (p = 3.00 × 10–12) in blood. No significant signals were found in CSF. Analyses of genome-wide association study data for target genes of brain miRNAs showed significant association (α = 9.40 × 10–5) of genetic variants in nine loci. Interpretation: We identified several miRNAs that showed highly significant differential expression in PD. Future studies may assess the possible role of the identified brain miRNAs in pathogenesis and disease progression as well as the potential of the top blood miRNAs as biomarkers for diagnosis, progression, or prediction of PD. ANN NEUROL 2019;85:835–851.
AB - Objective: MicroRNA (miRNA)-mediated (dys)regulation of gene expression has been implicated in Parkinson's disease (PD), although results of miRNA expression studies remain inconclusive. We aimed to identify miRNAs that show consistent differential expression across all published expression studies in PD. Methods: We performed a systematic literature search on miRNA expression studies in PD and extracted data from eligible publications. After stratification for brain, blood, and cerebrospinal fluid (CSF)-derived specimen, we performed meta-analyses across miRNAs assessed in three or more independent data sets. Meta-analyses were performed using effect-size– and p-value–based methods, as applicable. Results: After screening 599 publications, we identified 47 data sets eligible for meta-analysis. On these, we performed 160 meta-analyses on miRNAs quantified in brain (n = 125), blood (n = 31), or CSF (n = 4). Twenty-one meta-analyses were performed using effect sizes. We identified 13 significantly (Bonferroni-adjusted α = 3.13 × 10–4) differentially expressed miRNAs in brain (n = 3) and blood (n = 10) with consistent effect directions across studies. The most compelling findings were with hsa-miR-132-3p (p = 6.37 × 10–5), hsa-miR-497-5p (p = 1.35 × 10–4), and hsa-miR-133b (p = 1.90 × 10–4) in brain and with hsa-miR-221-3p (p = 4.49 × 10–35), hsa-miR-214-3p (p = 2.00 × 10–34), and hsa-miR-29c-3p (p = 3.00 × 10–12) in blood. No significant signals were found in CSF. Analyses of genome-wide association study data for target genes of brain miRNAs showed significant association (α = 9.40 × 10–5) of genetic variants in nine loci. Interpretation: We identified several miRNAs that showed highly significant differential expression in PD. Future studies may assess the possible role of the identified brain miRNAs in pathogenesis and disease progression as well as the potential of the top blood miRNAs as biomarkers for diagnosis, progression, or prediction of PD. ANN NEUROL 2019;85:835–851.
UR - http://www.scopus.com/inward/record.url?scp=85065702469&partnerID=8YFLogxK
U2 - 10.1002/ana.25490
DO - 10.1002/ana.25490
M3 - Journal articles
C2 - 30990912
AN - SCOPUS:85065702469
SN - 0364-5134
VL - 85
SP - 835
EP - 851
JO - Annals of Neurology
JF - Annals of Neurology
IS - 6
ER -
