Evidence map›Paper›PMID 31701675›Full record

ArticleMolecular genetics & genomic medicine2020

Primary ciliary dyskinesia caused by a large homozygous deletion including exons 1-4 of DRC1 in Japanese patients with recurrent sinopulmonary infection.

Naoto Keicho, Minako Hijikata, Kozo Morimoto, Sakae Homma, Yoshio Taguchi, Arata Azuma, Shoji Kudoh

Open access · goldAbstract read
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Article in Molecular genetics & genomic medicine, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
1.6field-weighted citation impact, top 15% 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

11 citing papers in PubMed, 30 citations in OpenAlex.

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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

7 authors at 4 institutions in 1 country.

Naoto KeichoThe Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan.ORCID 0000-0001-8232-9448
Minako HijikataDepartment of Pathophysiology and Host Defense, the Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Tokyo, Japan.
Kozo MorimotoRespiratory Disease Center, Fukujuji Hospital, Japan Anti-Tuberculosis Association, Tokyo, Japan.ORCID 0000-0002-8239-9275
Sakae HommaDepartment of Advanced and Integrated Interstitial Lung Diseases Research, School of Medicine, Toho University, Tokyo, Japan.
Yoshio TaguchiDepartment of Respiratory Medicine, Tenri Hospital, Nara, Japan.
Arata AzumaDivision of Pulmonary Medicine and Oncology, Graduate School of Medicine, Nippon Medical School, Tokyo, Japan.ORCID 0000-0003-0506-9966
Shoji KudohJapan Anti-Tuberculosis Association, Tokyo, Japan.
Japan Anti Tuberculosis Association · JPNippon Medical School · JPTenri Hospital · JPToho University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDiffuse panbronchiolitis (DPB) is a sinopulmonary disease mainly affecting Asian populations. Primary ciliary dyskinesia (PCD) is a genetically heterogeneous disorder impairing ciliary structure and function. These two disorders are not easily distinguished by clinical signs and symptoms.

methodsIn 105 Japanese patients with recurrent sinopulmonary infection, initially diagnosed with DPB, and 37 patients with recurrent airway infection diagnosed in adulthood, the deletion allele of DRC1 or CCDC164, recently recognized as a pathogenic PCD gene variant, was searched using a multiplexed PCR-based method, and the deletion breakpoints and other variants around the gene were determined by Sanger sequencing and targeted resequencing.

resultsA large homozygous deletion in DRC1 was identified in three of the 142 patients. Furthermore, heterozygous carriers of the deletion with the same breakpoint were found with the allele frequency of 0.002 in the healthy Japanese population, indicating that this loss-of-function variant may be acting as a common mutation causing PCD in Japanese.

conclusionPCD caused by the DRC1 defect is not readily identified by either high-speed video-microscopy or ciliary ultrastructure analysis, posing significant difficulties in reaching a correct diagnosis without the aid of genetic tests. Careful investigation of the causes of sinopulmonary diseases is warranted in Asian populations.

Indexed as

Gene DeletionAdultBronchiolitisCiliaCiliary Motility DisordersDiagnosis, DifferentialExonsFemaleGenetic TestingHaemophilus InfectionsHomozygoteHumansMaleMicrotubule-Associated ProteinsMiddle AgedMultiplex Polymerase Chain ReactionDRC1 protein, humanMicrotubule-Associated Proteinsdiffuse panbronchiolitisfounder mutationloss-of-function variantnexin-dynein regulatory complexprimary ciliary dyskinesiasinopulmonary disease

Identifiers

PMID31701675
PMCPMC6978274
OpenAlexW2983225451

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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.