Evidence map›Paper›PMID 38750035›Full record

ArticleNature communications2024

Three stepwise pH progressions in stratum corneum for homeostatic maintenance of the skin.

Keitaro Fukuda, Yoshihiro Ito, Yuki Furuichi, Takeshi Matsui, Hiroto Horikawa, Takuya Miyano, Takaharu Okada, Mark van Logtestijn, Reiko J Tanaka, Atsushi Miyawaki and 1 more

Abstract read
In one paragraph

Article in Nature communications, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing 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

27 citing papers in PubMed.

  1. Review
  2. HomologousMaterials today. Bio · 2026
    Article
  3. Review
  4. Review
  5. Anaerobe-Driven Inflammation and Epithelial Barrier Disruption in Genital HIV Acquisition.American journal of reproductive immunology (New York, N.Y. : 1989) · 2026
    Review
  6. Review
  7. Proton-activated chloride channel PACC1 as acid sensor in epidermal desquamation.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  8. Article
  9. Article
  10. Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Urease promotes pH homeostasis and growth ofJournal of bacteriology · 2025
    Article
  17. Review
  18. Review
  19. Review
  20. Evaluation of Saponin-Rich Callus fromPlants (Basel, Switzerland) · 2025
    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

11 authors.

Keitaro Fukuda *Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.
Yoshihiro Ito *Department of Dermatology, Keio University School of Medicine, Tokyo, Japan.ORCID http://orcid.org/0000-0003-3536-4819
Yuki Furuichi *Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.
Takeshi MatsuiLaboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.ORCID http://orcid.org/0000-0001-7118-0414
Hiroto HorikawaLaboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.
Takuya MiyanoDepartment of Bioengineering, Imperial College London, London, UK.ORCID http://orcid.org/0000-0002-1181-6924
Takaharu OkadaLaboratory for Tissue Dynamics, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.ORCID http://orcid.org/0000-0002-4784-5145
Mark van LogtestijnDepartment of Bioengineering, Imperial College London, London, UK.
Reiko J TanakaDepartment of Bioengineering, Imperial College London, London, UK.ORCID http://orcid.org/0000-0002-0769-9382
Atsushi MiyawakiLaboratory for Cell Function Dynamics, RIKEN Center for Brain Science, Saitama, Japan.ORCID http://orcid.org/0000-0002-0671-4376
Masayuki AmagaiLaboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan. amagai@keio.jp.ORCID http://orcid.org/0000-0003-3314-7052

Funding

Japan Agency for Medical Research and Development (AMED) 19gm1010001Japan Agency for Medical Research and Development (AMED) 21ek0410058MEXT | Japan Society for the Promotion of Science (JSPS) 15H05948MEXT | Japan Society for the Promotion of Science (JSPS) 21K08356MEXT | Japan Society for the Promotion of Science (JSPS) 22H04994
6 · The paper itself

Abstract

The stratum corneum is the outermost skin layer with a vital role in skin barrier function. It is comprised of dead keratinocytes (corneocytes) and is known to maintain its thickness by shedding cells, although, the precise mechanisms that safeguard stratum corneum maturation and homeostasis remain unclear. Previous ex vivo studies have suggested a neutral-to-acidic pH gradient in the stratum corneum. Here, we use intravital pH imaging at single-corneocyte resolution to demonstrate that corneocytes actually undergo differentiation to develop three distinct zones in the stratum corneum, each with a distinct pH value. We identified a moderately acidic lower, an acidic middle, and a pH-neutral upper layer in the stratum corneum, with tight junctions playing a key role in their development. The upper pH neutral zone can adjust its pH according to the external environment and has a neutral pH under steady-state conditions owing to the influence of skin microbiota. The middle acidic pH zone provides a defensive barrier against pathogens. With mathematical modeling, we demonstrate the controlled protease activation of kallikrein-related peptidases on the stratum corneum surface that results in proper corneocyte shedding in desquamation. This work adds crucial information to our understanding of how stratum corneum homeostasis is maintained.

Indexed as

EpidermisHomeostasisKeratinocytesAnimalsCell DifferentiationFemaleHumansHydrogen-Ion ConcentrationMaleMiceMice, Inbred C57BLSkinTight Junctions

Identifiers

PMID38750035
PMCPMC11096370

What OpenQuestion holds

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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.