Evidence map›Paper›PMID 31207227›Full record

ArticleThe Journal of investigative dermatology2019

Clonal Expansion of Second-Hit Cells with Somatic Recombinations or C>T Transitions Form Porokeratosis in MVD or MVK Mutant Heterozygotes.

Akiharu Kubo, Takashi Sasaki, Hisato Suzuki, Aiko Shiohama, Satomi Aoki, Showbu Sato, Harumi Fujita, Noriko Ono, Noriko Umegaki-Arao, Tomoko Kawai and 6 more

Abstract read
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In one paragraph

Article in The Journal of investigative dermatology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

30 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  7. Epidermal second-hit mutation inGenes & diseases · 2025
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  10. Establishment of a Mouse Model for Porokeratosis Due to Mevalonate Diphosphate Decarboxylase Deficiency.Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI) · 2024
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

16 authors.

Akiharu KuboDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan; Keio-Maruho Laboratory of Skin Barriology, Keio University School of Medicine, Tokyo, Japan. Electronic address: akiharu@keio.jp.
Takashi SasakiCenter for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo, Japan.
Hisato SuzukiCenter for Medical Genetics, Keio University School of Medicine, Tokyo, Japan.
Aiko ShiohamaDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan; KOSÉ Endowed Program for Skin Care and Allergy Prevention, Keio University School of Medicine, Tokyo, Japan.
Satomi AokiDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan.
Showbu SatoDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan.
Harumi FujitaDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan; KOSÉ Endowed Program for Skin Care and Allergy Prevention, Keio University School of Medicine, Tokyo, Japan.
Noriko OnoDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan.
Noriko Umegaki-AraoDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan.
Tomoko KawaiDepartment of Maternal-Fetal Biology, National Center for Child Health and Development, Tokyo, Japan.
Kazuhiko NakabayashiDepartment of Maternal-Fetal Biology, National Center for Child Health and Development, Tokyo, Japan.
Kenichiro HataDepartment of Maternal-Fetal Biology, National Center for Child Health and Development, Tokyo, Japan.
Daisuke YamadaDepartment of Dermatology, University of Tokyo Graduate School of Medicine, Tokyo, Japan.
Yoichi MatsubaraNational Center for Child Health and Development, Tokyo, Japan.
Kenjiro KosakiCenter for Medical Genetics, Keio University School of Medicine, Tokyo, Japan.
Masayuki AmagaiDepartment of Dermatology, Keio University School of Medicine, Tokyo, Japan; Keio-Maruho Laboratory of Skin Barriology, Keio University School of Medicine, Tokyo, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Patients with disseminated superficial actinic porokeratosis (DSAP) and linear porokeratosis (LP) exhibit monoallelic germline mutations in genes encoding mevalonate pathway enzymes, such as MVD or MVK. Here, we showed that each skin lesion of DSAP exhibited an individual second hit genetic change in the wild-type allele of the corresponding gene specifically in the epidermis, indicating that a postnatal second hit triggering biallelic deficiency of the gene is required for porokeratosis to develop. Most skin lesions exhibited one of two principal second hits, either somatic homologous recombinations rendering the monoallelic mutation biallelic or C>T transition mutations in the wild-type allele. The second hits differed among DSAP lesions but were identical in those of congenital LP, suggesting that DSAP is attributable to sporadic postnatal second hits and congenital LP to a single second hit in the embryonic period. In the characteristic annular skin lesions of DSAP, the central epidermis featured mostly second hit keratinocytes, and that of the annular ring featured a mixture of such cells and naïve keratinocytes, implying that each lesion reflects the clonal expansion of single second hit keratinocytes. DSAP is therefore a benign intraepidermal neoplasia, which can be included in the genetic tumor disorders explicable by Knudson's two-hit hypothesis.

Indexed as

MutationCarboxy-LyasesDNADNA Mutational AnalysisEpidermisFemaleHeterozygoteHumansPedigreePhosphotransferases (Alcohol Group Acceptor)PorokeratosisCarboxy-LyasesDNAmevalonate kinasePhosphotransferases (Alcohol Group Acceptor)pyrophosphomevalonate decarboxylase

Identifiers

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.