XPGCS SIGNED
Single cell profiling of X chromosome reactivation during primordial germ cell specification in vivo
Total Cost €
0EC-Contrib. €
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Project "XPGCS" data sheet
The following table provides information about the project.
| Coordinator |
THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE
Organization address contact info |
| Coordinator Country | United Kingdom [UK] |
| Project website | https://www.gurdon.cam.ac.uk/research/surani |
| Total cost | 195˙454 € |
| EC max contribution | 195˙454 € (100%) |
| Programme |
1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility) |
| Code Call | H2020-MSCA-IF-2015 |
| Funding Scheme | MSCA-IF-EF-ST |
| Starting year | 2016 |
| Duration (year-month-day) | from 2016-03-01 to 2018-04-17 |
Partnership
Take a look of project's partnership.
| # | ||||
|---|---|---|---|---|
| 1 | THE CHANCELLOR MASTERS AND SCHOLARSOF THE UNIVERSITY OF CAMBRIDGE | UK (CAMBRIDGE) | coordinator | 195˙454.00 |
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Project objective
In female mice, one of the two X chromosomes is inactivated during early development to ensure dosage compensation between genders. A long non-coding gene, Xist, plays a crucial role in the initiation of the X chromosome inactivation (XCI) process. Primordial germ cells (PGCs), the precursors of sperm and eggs, transmit genetic and epigenetic information to subsequent generations, following extensive reprogramming, erasure of methylation and genomic imprints, and X chromosome reactivation. The inactive X (Xi) then undergoes progressive reprogramming and reactivation in the germline of female embryos, through the loss of Xist RNA coating, followed by the erasure of the repressive H3K27me3 histone mark, and eventually biallelic expression of X-linked genes. Although the global dynamics of Xi reactivation have been mapped little is known about the gene-specific dynamics, or the mechanisms involved. To explore gene activity on the entire X chromosome during reprogramming in the germline, I will perform single-cell transcriptome analyses on PGCs from C57BL/6 X Castaneus F1 female hybrid embryos. The high rate of sequence polymorphisms between these strains provides allele-specific information for the activity of the Xp (paternal X) and the Xm (maternal X). I will investigate the kinetics of Xp and Xm gene reactivation chromosome-wide at the single cell level following PGC specification. Furthermore, I will study the dynamics of the expression of X-linked genes in conjunction with chromatin changes in PGCs by monitoring the loss of H3K27me3 enrichment on the inactive X chromosome. In parallel, I will study how the regulation of H3K27me3 affect Xi reactivation by using a conditional mutant mouse model of a H3K27me3 demethylase, UTX. Altogether, the innovative and multidisciplinary approach of this study will unravel important insights on germline reprogramming and the roles of chromatin changes associated with X chromosome reactivation.
Publications
| year | authors and title | journal | last update |
|---|---|---|---|
| 2018 |
Jan J Zylicz, Maud Borensztein, Frederick CK Wong, Yun Huang, Caroline Lee, Sabine Dietmann, M Azim Surani G9a regulates temporal preimplantation developmental program and lineage segregation in blastocyst published pages: , ISSN: 2050-084X, DOI: 10.7554/eLife.33361 |
eLife 7 | 2019-06-13 |
| 2017 |
Maud Borensztein, Ikuhiro Okamoto, Laurène Syx, Guillaume Guilbaud, Christel Picard, Katia Ancelin, Rafael Galupa, Patricia Diabangouaya, Nicolas Servant, Emmanuel Barillot, Azim Surani, Mitinori Saitou, Chong-Jian Chen, Konstantinos Anastassiadis, Edith Heard Contribution of epigenetic landscapes and transcription factors to X-chromosome reactivation in the inner cell mass published pages: , ISSN: 2041-1723, DOI: 10.1038/s41467-017-01415-5 |
Nature Communications 8/1 | 2019-06-13 |
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