The transcriptomic landscape of monosomy X (45,X) during early human fetal and placental development
Monosomy X (45,X) is associated with Turner syndrome and pregnancy loss in humans, but the underlying mechanisms remain unclear. We therefore undertook an exploratory study of the transcriptomic landscape of clinically relevant human fetal 45,X tissues (including pancreas, liver, kidney, skin, placenta) with matched 46,XX and 46,XY control samples between 11 and 15 weeks post conception (n = 78). Although most pseudoautosomal region 1 (PAR1) genes are lower in monosomy X tissues, we also found reduced expression of several key genes escaping X inactivation (e.g., KDM5C and KDM6A), several ancestral X-Y gene pairs, and potentially clinically important transcripts such as genes implicated in ascending aortic aneurysm. In contrast, higher expression of an autosomal, long non-coding RNA (OVCH1-AS1) is seen in all 45,X tissues. In the placenta, lower expression of CSF2RA is demonstrated, likely contributing to immune dysregulation. Taken together, these findings provide insights into the biological consequences of a single X chromosome during early human development and potential insights in genetic mechanisms in Turner syndrome.
Authors
- Gaganjit K. Madhan
- John C. Achermann (ORCID: https://orcid.org/0000-0001-8787-6272)
- Federica Buonocore (ORCID: https://orcid.org/0000-0002-8274-7241)
- Ignacio del Valle (ORCID: https://orcid.org/0000-0003-2595-3652)
- Abigail R. Marshall (ORCID: https://orcid.org/0000-0003-4537-747X)
- Miho Ishida (ORCID: https://orcid.org/0000-0002-4769-2273)
- Gudrun E. Moore (ORCID: https://orcid.org/0000-0002-2099-3420)
- Jenifer P. Suntharalingham (ORCID: https://orcid.org/0000-0002-8897-7697)
- Neil J. Sebire (ORCID: https://orcid.org/0000-0001-5348-9063)
- Sinead McGlacken‐Byrne (ORCID: https://orcid.org/0000-0002-4289-0852)
- Olumide Ogunbiyi (ORCID: https://orcid.org/0000-0001-5208-5526)
- Gerard S. Conway (ORCID: https://orcid.org/0000-0002-3346-5029)
- Tony Brooks (ORCID: https://orcid.org/0000-0002-3494-3045)
- Berta Crespo (ORCID: https://orcid.org/0000-0003-0006-009X)
- Nita Solanky (ORCID: https://orcid.org/0000-0001-8304-5543)
- Kate B. Metcalfe (ORCID: https://orcid.org/0000-0002-9787-3638)
- Nathan Dunton (ORCID: https://orcid.org/0009-0001-1696-7748)
- Danielle Liptrot (ORCID: https://orcid.org/0000-0002-2612-0815)
- Lydia Nel
Institutions
- Great Ormond Street Hospital for Children NHS Foundation Trust (GB)
- Institute of Child Health (IN)
- University College London (GB)
Publication Details
- Journal
- Communications Biology
- Published
- 2025-02-16
- DOI
- https://doi.org/10.1038/s42003-025-07699-4
- Citations
- 5
- Primary Topic
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Type
- article
- Field-Weighted Citation Impact
- 9.09
Funders
- Wellcome
- Wellcome Trust
- National Institute for Health and Care Research
- National Institutes of Health
- Medical Research Council
- Great Ormond Street Institute of Child Health
- National Heart, Lung, and Blood Institute
- National Institute of Mental Health
- National Institute on Drug Abuse
- National Human Genome Research Institute
- NIH Office of the Director
- National Cancer Institute
- National Institute of Neurological Disorders and Stroke
- Common Fund