Evidence map›Paper›PMID 33579867›Full record

ReviewJournal of Huntington's disease2021

FAN1, a DNA Repair Nuclease, as a Modifier of Repeat Expansion Disorders.

Amit L Deshmukh, Antonio Porro, Mohiuddin Mohiuddin, Stella Lanni, Gagan B Panigrahi, Marie-Christine Caron, Jean-Yves Masson, Alessandro A Sartori, Christopher E Pearson

Open access · bronzeAbstract readReview
In one paragraph

Review in Journal of Huntington's disease, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
3.7field-weighted citation impact, top 6% 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

40 citing papers in PubMed, 70 citations in OpenAlex.

  1. Review
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  12. Emerging drivers of DNA repeat expansions.Biochemical Society transactions · 2025
    Review
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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

9 authors at 4 institutions in 3 countries.

Amit L DeshmukhProgram of Genetics & Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada.
Antonio PorroInstitute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland.
Mohiuddin MohiuddinProgram of Genetics & Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada.
Stella LanniProgram of Genetics & Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada.
Gagan B PanigrahiProgram of Genetics & Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada.
Marie-Christine CaronDepartment of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, Quebec, Canada.
Jean-Yves MassonDepartment of Molecular Biology, Medical Biochemistry and Pathology; Laval University Cancer Research Center, Québec City, Quebec, Canada.
Alessandro A SartoriInstitute of Molecular Cancer Research, University of Zurich, Zurich, Switzerland.
Christopher E PearsonProgram of Genetics & Genome Biology, The Hospital for Sick Children, The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada.
Hospital for Sick Children · CACentre hospitalier universitaire de Québec · CAUniversity of Zurich · CHUniversity of Toronto · CA

Funding

CIHR FDN-388879CIHR FRN148910
6 · The paper itself

Abstract

FAN1 encodes a DNA repair nuclease. Genetic deficiencies, copy number variants, and single nucleotide variants of FAN1 have been linked to karyomegalic interstitial nephritis, 15q13.3 microdeletion/microduplication syndrome (autism, schizophrenia, and epilepsy), cancer, and most recently repeat expansion diseases. For seven CAG repeat expansion diseases (Huntington's disease (HD) and certain spinocerebellar ataxias), modification of age of onset is linked to variants of specific DNA repair proteins. FAN1 variants are the strongest modifiers. Non-coding disease-delaying FAN1 variants and coding disease-hastening variants (p.R507H and p.R377W) are known, where the former may lead to increased FAN1 levels and the latter have unknown effects upon FAN1 functions. Current thoughts are that ongoing repeat expansions in disease-vulnerable tissues, as individuals age, promote disease onset. Fan1 is required to suppress against high levels of ongoing somatic CAG and CGG repeat expansions in tissues of HD and FMR1 transgenic mice respectively, in addition to participating in DNA interstrand crosslink repair. FAN1 is also a modifier of autism, schizophrenia, and epilepsy. Coupled with the association of these diseases with repeat expansions, this suggests a common mechanism, by which FAN1 modifies repeat diseases. Yet how any of the FAN1 variants modify disease is unknown. Here, we review FAN1 variants, associated clinical effects, protein structure, and the enzyme's attributed functional roles. We highlight how variants may alter its activities in DNA damage response and/or repeat instability. A thorough awareness of the FAN1 gene and FAN1 protein functions will reveal if and how it may be targeted for clinical benefit.

Indexed as

AnimalsDNA RepairEndodeoxyribonucleasesExodeoxyribonucleasesGenes, ModifierGenomic InstabilityHumansHuntington DiseaseMultifunctional EnzymesSpinocerebellar AtaxiasTrinucleotide Repeat ExpansionEndodeoxyribonucleasesExodeoxyribonucleasesFAN1 protein, humanMultifunctional EnzymesDNA repairFAN1Huntington’s diseasekaryomegalic interstitial nephritismodifiernucleaserepeat instability

Identifiers

PMID33579867
PMCPMC7990447
OpenAlexW3128652716

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.