DNA methylation in schizophrenia in different patient-derived cell types
Alejandra M Vitale1,2, Nicholas A Matigian1,3, Alexandre S Cristino3
1Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD Australia.
NPJ Schizophrenia
|June 1, 2017
Summary
Schizophrenia risk may involve DNA methylation changes in various cell types. These epigenetic alterations affect gene networks crucial for cell growth and movement, offering insights into early developmental impacts.
Area of Science:
- Neuroscience
- Genetics
- Epigenetics
Background:
- DNA methylation in gene promoter regions influences transcription and is a key mechanism for environmental factors impacting development in individuals at risk for schizophrenia.
- Investigating DNA methylation in patient-derived cells can illuminate early developmental processes in schizophrenia.
- Different cell types (induced pluripotent stem cells, olfactory neurosphere-derived cells, fibroblasts) offer varying perspectives on developmental and environmental influences.
Purpose of the Study:
- To investigate genome-wide DNA methylation and gene expression patterns in three distinct cell types derived from individuals at risk for schizophrenia.
- To identify schizophrenia-associated epigenetic differences and their functional implications across different cellular contexts.
- To explore the role of epigenetics in cell function relevant to schizophrenia pathogenesis.
Main Methods:
- Genome-wide DNA methylation profiling.
- Gene expression analysis.
- Gene Ontology analysis to identify affected biological networks.
Main Results:
- All three cell types exhibited distinct, statistically significant schizophrenia-associated differences in DNA methylation and gene expression.
- Differentially methylated genes clustered in networks related to cell growth, proliferation, and movement, functions implicated in schizophrenia.
- Only five gene loci showed differential methylation across all three cell types, highlighting cell-type-specific epigenetic regulation.
Conclusions:
- Schizophrenia-associated epigenetic alterations are present across various cell types, impacting critical cellular functions.
- Understanding the complex interplay of intrinsic and environmental epigenetic regulation is crucial for elucidating schizophrenia's pathogenesis.
- Cell type-specific epigenetic differences complicate the interpretation of epigenetics in brain function in schizophrenia.
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