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Development of patient-specific neurons in schizophrenia using induced pluripotent stem cells: proof of principle and preliminary findings

ABSTRACT: Induced pluripotent stem cell (iPSC) technology has the potential to address the inaccessibility of the human brain by providing investigators with patient-specific neurons that can potentially be used to carry out molecular, electrophysiological and pharmacological studies {{855 Takahashi,K. 2006}}. Although iPSC technology was primarily conceived and developed as a means to bypass the use of human embryonic stem cells (hESCs) for regenerative medicine, its potential for disease modeling may prove to be equally valuable, especially for neuropsychiatric disorders. A total of 1207 genes were found to be differentially expressed using LIMMA (>2-fold, p-value <0.05), and these genes were hierarchically clustered to form 5 groups based on their expression in day 0, 10 and 32. These were subjected to bioinformatics analysis by Gene Ontogoly (GO) and Ingenuity Pathway Analysis (IPA) to determine enrichment profiles and associated disease processes. The largest cluster (cluster III), which showed increasing expression in both day 10 and day 32 neurons, was found to be enriched with genes involved in a number of neuronal pathways including neurogenesis, neuronal differentiation, axon guidance and adhesion, among others.

ORGANISM(S): Homo sapiens

PROVIDER: GSE26629 | GEO | 2011/01/14

SECONDARY ACCESSION(S): PRJNA136445

REPOSITORIES: GEO

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Project description:To determine IL-17-induced global transcriptome changes in midbrain neurons derived from induced pluripotent stem cells (iPSC) from three sporadic Parkinson's disease (PD) patients and three age- and sex-machted controls, deep RNA sequencing (RNA-Seq) of IL-17-treated and untreated PD and control iPSC-dderived midbrain neurons was performed. Total RNA was isolated from untreated and IL-17-treated cells with the TruSeq RNA Sample Preparation Kit v2 (Illumina). RNA libraries were quantified using the KAPA SYBR FAST ABI Prism Library Quantification Kit (Kapa Biosystems) and cluster generation was performed on the cBot with the TruSeq SR Cluster Kit v3 (Illumina). The sequencing run was performed on a HiSeq 1000 instrument (Illumina) using the indexed, 50 cycles single read (SR) protocol and the TruSeq SBS v3 Kit (Illumina). Image analysis and base calling resulted in .bcl files that were then converted into .fastQ files by the CASAVA1.8.2 software. FastQ files were aligned to the human genome (hg19) using STAR.and annotated with gencode.v19. DESeq2 was used to determine differential expression. Criteria to determine significantly dysregulated genes were as follows: adjusted p-value below 0.05 and log2FC (fold change) of greater than one. Only genes with a mean expression value of greater than one RPKM (reads per kilobase per million mapped reads) throughout the dataset were considered. Control and PD samples were analyzed as two independent datasets. Upon IL-17 treatment only 17 genes were found to be dysregulated in controls but 125 genes were dysregulated in iPSC-derived midbrain neurons from PD patients. The 125 IL-17-dependent genes in PD iPSC-derived neurons separated the treated from untreated PD samples using an unsupervised, hierarchical clustering applying an Euclidean distance metric. More detailed study information can be found in Sommer A, Maxreiter F, Krach F, Fadler T, Grosch J, Maroni M, Graef D, Eberhardt E, Riemenschneider MJ, Yeo GW, Kohl Z, Xiang W, Gage FH, Winkler J, Prots I, Winner B. Th17 Lymphocytes Induce Neuronal Cell Death in a Human iPSC-Based Model of Parkinson's Disease. Cell Stem Cell. 2018 Jul 5;23(1):123-131.e6. doi: 10.1016/j.stem.2018.06.015. PMID: 29979986

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Development of patient-specific neurons in schizophrenia using induced pluripotent stem cells: proof of principle and preliminary findings

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