Evidence map›Paper›PMID 33911773›Full record

ArticleAnnals of dermatology2020

Particulate Matters Induce Apoptosis in Human Hair Follicular Keratinocytes.

Mee Sook Jun, Mi Hee Kwack, Moon Kyu Kim, Jung Chul Kim, Young Kwan Sung

Abstract read
In one paragraph

Article in Annals of dermatology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–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

13 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. [Effects of particulate matter pollution on human skin].Dermatologie (Heidelberg, Germany) · 2026
    Review
  5. Article
  6. Article
  7. Air Pollution and Skin Diseases.Annals of dermatology · 2025
    Review
  8. Review
  9. Review
  10. Review
  11. Article
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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

5 authors.

Mee Sook JunDepartment of Immunology, School of Medicine, Kyungpook National University, Daegu, Korea.ORCID https://orcid.org/0000-0003-2699-4739
Mi Hee KwackDepartment of Immunology, School of Medicine, Kyungpook National University, Daegu, Korea.ORCID https://orcid.org/0000-0002-7381-6532
Moon Kyu KimDepartment of Immunology, School of Medicine, Kyungpook National University, Daegu, Korea.ORCID https://orcid.org/0000-0003-0081-4234
Jung Chul KimDepartment of Immunology, School of Medicine, Kyungpook National University, Daegu, Korea.ORCID https://orcid.org/0000-0002-0720-0991
Young Kwan SungDepartment of Immunology, School of Medicine, Kyungpook National University, Daegu, Korea.ORCID https://orcid.org/0000-0002-5122-4616

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundParticulate matters (PM) comprise a heterogeneous mixture of particles suspended in air. A recent study found that urban PMs may penetrate into hair follicles via transfollicular and transdermal routes in dorsal skin.

objectiveTo investigate the effects of PM on

methodsTUNEL staining was employed to check cells undergoing apoptosis in cultured hair follicles after PM treatment. MTT assay was employed to check cell viability after PM treatment. Quantitative real-time PCR analysis was employed to quantitate the expression of inflammatory genes, matrix metalloproteinases (MMPs), and Duox1. Inflammatory cytokine levels were measured by ELISA after PM treatment. The level of reactive oxygen species (ROS) production was measured using a chemical fluorescent probe by a fluorescence plate reader.

resultsAbundant TUNEL-positive cells were observed in the keratinocyte region of hair including the epidermis, sebaceous gland, outer root sheath (ORS), inner root sheath (IRS), and bulb region. The viability of follicular cells, including the ORS, was found to be decreased upon PM exposure. mRNA expression and protein levels of inflammatory response genes and MMPs were upregulated in a dose-dependent manner by PM treatment. ROS levels were also increased by PM.

conclusionThese data strongly suggest that penetrated PMs from air pollution may cause apoptotic cell death to follicular keratinocytes by increased production of ROS and inflammatory cytokines, which could impair hair growth.

Indexed as

ApoptosisHair keratinocyteHair lossParticulate matterReactive oxygen species

Identifiers

PMID33911773
PMCPMC7992589

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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.