Evidence map›Paper›PMID 34103397›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

The dynamic epigenetic regulation of the inactive X chromosome in healthy human B cells is dysregulated in lupus patients.

Sarah Pyfrom, Bam Paneru, James J Knox, Michael P Cancro, Sylvia Posso, Jane H Buckner, Montserrat C Anguera

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed
15.1field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

78 citing papers in PubMed, 112 citations in OpenAlex.

  1. Review
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  3. Sex-dependent mechanisms in rheumatic diseases.Nature reviews. Rheumatology · 2026
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18 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 1 country.

Sarah PyfromDepartment of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104.ORCID 0000-0002-3781-6463
Bam PaneruDepartment of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104.ORCID 0000-0001-6589-8446
James J KnoxDepartment of Pathology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104.
Michael P CancroDepartment of Pathology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104.ORCID 0000-0002-8659-3227
Sylvia PossoBenaroya Research Institute at Virginia Mason, Seattle, WA 98101.ORCID 0000-0002-6572-4291
Jane H BucknerBenaroya Research Institute at Virginia Mason, Seattle, WA 98101.ORCID 0000-0002-9005-1885
Montserrat C AngueraDepartment of Biomedical Sciences, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104; anguera@vet.upenn.edu.ORCID 0000-0003-4992-3079
University of Pennsylvania · USVirginia Mason Medical Center · US

Funding

Gene regulation mechanisms involving the inactive X in B cells during lupus diseaseR01AI134834 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI Montserrat C Anguera · 2018 to 2026
$4.2M
Training in Sex and Gender Differences Research to Improve Women's HealthK12HD085848 · NICHD · UNIVERSITY OF PENNSYLVANIA · PI OQUENDO, MARIA A · 2015 to 2019
$2.2M
Expression of X-linked autoimmunity genes in B cells during female-biased autoimmunityR21AI124084 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI ANGUERA, MONTSERRAT C · 2017 to 2018
$443k
Identifying the Xist interactome during dynamic X inactivation in healthy and lupus-derived B cellsF32AI154797 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI PYFROM, SARAH CATHERINE · 2020 to 2022
$201k
NIAID NIH HHS F32 AI154797NIAID NIH HHS R01 AI134834NIAID NIH HHS R21 AI124084NICHD NIH HHS K12 HD085848
6 · The paper itself

Abstract

Systemic lupus erythematous (SLE) is a female-predominant disease characterized by autoimmune B cells and pathogenic autoantibody production. Individuals with two or more X chromosomes are at increased risk for SLE, suggesting that X-linked genes contribute to the observed sex bias of this disease. To normalize X-linked gene expression between sexes, one X in female cells is randomly selected for transcriptional silencing through X-chromosome inactivation (XCI), resulting in allele-specific enrichment of epigenetic modifications, including histone methylation and the long noncoding RNA XIST/Xist on the inactive X (Xi). As we have previously shown that epigenetic regulation of the Xi in female lymphocytes from mice is unexpectedly dynamic, we used RNA fluorescence in situ hybridization and immunofluorescence to profile epigenetic features of the Xi at the single-cell level in human B cell subsets from pediatric and adult SLE patients and healthy controls. Our data reveal that abnormal XCI maintenance in B cells is a feature of SLE. Using single-cell and bulk-cell RNA sequencing datasets, we found that X-linked immunity genes escape XCI in specific healthy human B cell subsets and that human SLE B cells exhibit aberrant expression of X-linked genes and XIST RNA interactome genes. Our data reveal that mislocalized XIST RNA, coupled with a dramatic reduction in heterochromatic modifications at the Xi in SLE, predispose for aberrant X-linked gene expression from the Xi, thus defining a genetic and epigenetic pathway that affects X-linked gene expression in human SLE B cells and likely contributes to the female bias in SLE.

Indexed as

Epigenesis, GeneticAdolescentAdultAllelesB-LymphocytesChildChromosomes, Human, XGene Expression ProfilingHeterochromatinHistonesHumansLupus Erythematosus, SystemicLymphocyte SubsetsLysineMethylationMiddle AgedHeterochromatinHistonesLysineRNA, Long NoncodingUbiquitinXIST non-coding RNAhuman B cellslupussex differencesX-chromosome inactivationXIST RNA

Identifiers

PMID34103397
PMCPMC8214693
OpenAlexW3169896884

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.