Inducible uniparental chromosome disomy to probe genomic imprinting at single-cell level in brain and beyond

F. Pauler, Q. Hudson, S. Laukoter, S. Hippenmeyer, Neurochemistry International 145 (2021).


Journal Article | Epub ahead of print | English
Department
Abstract
Genomic imprinting is an epigenetic mechanism that results in parental allele-specific expression of ~1% of all genes in mouse and human. Imprinted genes are key developmental regulators and play pivotal roles in many biological processes such as nutrient transfer from the mother to offspring and neuronal development. Imprinted genes are also involved in human disease, including neurodevelopmental disorders, and often occur in clusters that are regulated by a common imprint control region (ICR). In extra-embryonic tissues ICRs can act over large distances, with the largest surrounding Igf2r spanning over 10 million base-pairs. Besides classical imprinted expression that shows near exclusive maternal or paternal expression, widespread biased imprinted expression has been identified mainly in brain. In this review we discuss recent developments mapping cell type specific imprinted expression in extra-embryonic tissues and neocortex in the mouse. We highlight the advantages of using an inducible uniparental chromosome disomy (UPD) system to generate cells carrying either two maternal or two paternal copies of a specific chromosome to analyze the functional consequences of genomic imprinting. Mosaic Analysis with Double Markers (MADM) allows fluorescent labeling and concomitant induction of UPD sparsely in specific cell types, and thus to over-express or suppress all imprinted genes on that chromosome. To illustrate the utility of this technique, we explain how MADM-induced UPD revealed new insights about the function of the well-studied Cdkn1c imprinted gene, and how MADM-induced UPDs led to identification of highly cell type specific phenotypes related to perturbed imprinted expression in the mouse neocortex. Finally, we give an outlook on how MADM could be used to probe cell type specific imprinted expression in other tissues in mouse, particularly in extra-embryonic tissues.
Publishing Year
Date Published
2021-02-15
Journal Title
Neurochemistry International
Acknowledgement
We thank Melissa Stouffer for critically reading the manuscript. This work was supported by IST Austria institutional funds; NÖ Forschung und Bildung n[f + b] life science call grant (C13-002) to S.H. and the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement 725780 LinPro) to S.H.
Volume
145
Issue
5
Article Number
104986
ISSN
IST-REx-ID

Cite this

Pauler F, Hudson Q, Laukoter S, Hippenmeyer S. Inducible uniparental chromosome disomy to probe genomic imprinting at single-cell level in brain and beyond. Neurochemistry International. 2021;145(5). doi:10.1016/j.neuint.2021.104986
Pauler, F., Hudson, Q., Laukoter, S., & Hippenmeyer, S. (2021). Inducible uniparental chromosome disomy to probe genomic imprinting at single-cell level in brain and beyond. Neurochemistry International. Elsevier. https://doi.org/10.1016/j.neuint.2021.104986
Pauler, Florian, Quanah Hudson, Susanne Laukoter, and Simon Hippenmeyer. “Inducible Uniparental Chromosome Disomy to Probe Genomic Imprinting at Single-Cell Level in Brain and Beyond.” Neurochemistry International. Elsevier, 2021. https://doi.org/10.1016/j.neuint.2021.104986.
F. Pauler, Q. Hudson, S. Laukoter, and S. Hippenmeyer, “Inducible uniparental chromosome disomy to probe genomic imprinting at single-cell level in brain and beyond,” Neurochemistry International, vol. 145, no. 5. Elsevier, 2021.
Pauler F, Hudson Q, Laukoter S, Hippenmeyer S. 2021. Inducible uniparental chromosome disomy to probe genomic imprinting at single-cell level in brain and beyond. Neurochemistry International. 145(5), 104986.
Pauler, Florian, et al. “Inducible Uniparental Chromosome Disomy to Probe Genomic Imprinting at Single-Cell Level in Brain and Beyond.” Neurochemistry International, vol. 145, no. 5, 104986, Elsevier, 2021, doi:10.1016/j.neuint.2021.104986.
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