Cited by 189Genetic and Clinical Aspects of Sex Determination and Chromosomal AbnormalitiesGenomics and Chromatin DynamicsCancer-related molecular mechanisms research

Xist localization and function: new insights from multiple levels

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Cerase, Andrea, Pintacuda, Greta, Tattermusch, Anna, Avner, Philip·2015·Genome biology

Abstract

In female mammals, one of the two X chromosomes in each cell is transcriptionally silenced in order to achieve dosage compensation between the genders in a process called X chromosome inactivation. The master regulator of this process is the long non-coding RNA Xist. During X-inactivation, Xist accumulates in cis on the future inactive X chromosome, triggering a cascade of events that provoke the stable silencing of the entire chromosome, with relatively few genes remaining active. How Xist spreads, what are its binding sites, how it recruits silencing factors and how it induces a specific topological and nuclear organization of the chromatin all remain largely unanswered questions. Recent studies have improved our understanding of Xist localization and the proteins with which it interacts, allowing a reappraisal of ideas about Xist function. We discuss recent advances in our knowledge of Xist-mediated silencing, focusing on Xist spreading, the nuclear organization of the inactive X chromosome, recruitment of the polycomb complex and the role of the nuclear matrix in the process of X chromosome inactivation.

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  • X inactivation escape, in addition to epigenetic effects on genes on all chromosomes, results in sex/gender differences in the rates of many medical conditions.

    “This process, in addition to epigenetic effects on genes on all chromosomes (50, 51), results in sex/gender differences in the rates of many medical conditions.”

    From Where Sex Meets Gender: How Sex and Gender Come Together to Cause Sex Differences in Mental Illness (2022) · cites this paper as [50]

    The Abstract (page not provided) says that X inactivation silences one X chromosome while relatively few genes remain active, supporting the escape aspect. The cited paper does not link escape to differences in medical-condition rates or describe epigenetic effects on genes on all chromosomes. (LLM, conf=0.83)

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  • Because females have two X chromosomes, one in each body cell is automatically and randomly inactivated so that males and females end up with an approximately equal total of gene products.

    “Because females have two X chromosomes, one in each body cell is automatically and randomly inactivated so that males and females end up with an approximately equal total of gene products (50).”

    From Where Sex Meets Gender: How Sex and Gender Come Together to Cause Sex Differences in Mental Illness (2022) · cites this paper as [50]

    The Introduction says that silencing one of the two X chromosomes in female cells provides dosage compensation between XX and XY individuals. It also distinguishes random inactivation in mouse inner-cell-mass cells from earlier embryonic inactivation that preferentially affects the paternal X, so it does not support describing X inactivation as uniformly random in every body cell. (LLM, conf=0.87)

    Experimental — accuracy not yet measured

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Authors
Cerase, A., Pintacuda, G., Tattermusch, A., & Avner, P.
Affiliations
  • European Molecular Biology Laboratory (IT)
  • University of Oxford (GB)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
  • Cerase, Andrea
  • Avner, Philip
Venue
Genome biology
Published
2015-08-15
Volume
16
Issue
1
Pages
166-166
ISSN
  • 1465-6906 (ISSN-L)
  • 1474-760X
OpenAlex
W2137720632
Cited by
189
References
92
Citations by year
2026: 6 · 2025: 14 · 2024: 9 · 2023: 13 · 2022: 18 · 2021: 16 · 2020: 19 · 2019: 29 · 2018: 22 · 2017: 28 · 2016: 13 · 2015: 1 · 2013: 1
FWCI
2.76
Type
journal article
Language
en
Open access
Locations
  • Genome biology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial research information system (University of Pisa) (submittedVersion)
Funders
  • EMBL (50800)
  • Medical Research Council (1036324)
  • Wellcome Trust (ID0ETXAG1525)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
Keywords
XIST, X chromosome inactivation, dosage compensation, long non-coding RNA, inactive X chromosome, nuclear organization, Polycomb complexes, nuclear matrix
MeSH terms
Animals, Cell Nucleus, Female, Gene Silencing, X Chromosome Inactivation, Mice, RNA, Long Noncoding, Polycomb-Group Proteins

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