Evidence map›Paper›PMID 35164800›Full record

ArticleOrphanet journal of rare diseases2022

Clinical measurement of cellular DNA damage hypersensitivity in patients with DNA repair defects.

Ola Hammarsten, Anna Lyytikäinen, Sofia Thunström, Torben Ek, Anders Fasth, Olov Ekwall, Sara Cajander, Emilie Wahren Borgström, C I Edvard Smith, Pegah Johansson

Open access · goldAbstract read
In one paragraph

Article in Orphanet journal of rare diseases, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
0.1field-weighted citation impact, top 60% 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

1 citing paper in PubMed, 2 citations in OpenAlex.

  1. Article
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

10 authors at 5 institutions in 1 country.

Ola HammarstenLaboratory of Clinical Chemistry, Sahlgrenska University Hospital, Gothenburg, Sweden.
Anna LyytikäinenLaboratory of Clinical Chemistry, Sahlgrenska University Hospital, Gothenburg, Sweden.
Sofia ThunströmDepartment of Clinical Genetics, Sahlgrenska University Hospital, Gothenburg, Sweden.
Torben EkChildren's Cancer Centre, Queen Silvia Children's Hospital, Gothenburg, Sweden.
Anders FasthDepartment of Pediatrics, , Institution of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Olov EkwallDepartment of Pediatrics, , Institution of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Sara CajanderDepartment of Infectious Diseases, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.
Emilie Wahren BorgströmDepartment of Infectious Diseases, The Immunodeficiency Unit, Karolinska University Hospital, Huddinge, Stockholm, Sweden.
C I Edvard SmithDepartment of Infectious Diseases, The Immunodeficiency Unit, Karolinska University Hospital, Huddinge, Stockholm, Sweden.
Pegah JohanssonLaboratory of Clinical Chemistry, Sahlgrenska University Hospital, Gothenburg, Sweden. pegah.johansson@gu.se.ORCID 0000-0002-0376-0617
Sahlgrenska University Hospital · SEKarolinska University Hospital · SEUniversity of Gothenburg · SEDrottning Silvias barn- och ungdomssjukhus · SEÖrebro University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDNA repair deficiency disorders are rare inherited diseases arising from pathogenic (disease-causing) variants in genes involved in DNA repair. There are no standardized diagnostic assays for the investigation of pathological significance of unknown variants in DNA repair genes. We hypothesized that our assays for measuring in vitro patient blood cell hypersensitivity to DNA-damaging agents can be used to establish the pathological significance of unknown variants in DNA repair genes. Six patients with variants in the DNA repair genes PRKDC (two siblings), DCLRE1C (two siblings), NBN, and MSH6 were included. Here, we used the cell division assay (CDA) and the γ-H2AX assay, which were both developed and clinically validated by us, to measure patient cell hypersensitivity in response to ionizing radiation, mitomycin C, cytarabine and doxorubicin.

resultsRadiation hypersensitivity was detected in the two patients with variants in the PRKDC gene (p < 0.0001 for both at 3.5 Gy), and the two patients with DCLRE1C variants (p < 0.0001 at 3.5 Gy for sibling 1 and p < 0.0001 at 1 Gy for sibling 2). The cells from the patients with the PRKDC variant were also deficient in removing γ-H2AX (p < 0.001). The cells from the patient with variants in the NBN gene were hypersensitive to mitomycin C (p = 0.0008) and deficient in both induction and removal of γ-H2AX in response to radiation.

conclusionsThe combination of the CDA and the γ-H2AX assay is useful in investigating the significance of unknown variants in some DNA repair genes.

Indexed as

DNA RepairHistonesCell LineDNA DamageFibroblastsHumansHistonesCell division assay (CDA)Clinical diagnosisDNA repair deficiency disordersIonizing radiation sensitivityMitomycin C sensitivityγ-H2AX

Identifiers

PMID35164800
PMCPMC8842932
OpenAlexW4212958261

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.