Evidence map›Paper›PMID 30887615›Full record

ReviewExperimental dermatology2019

An updated classification of hair follicle morphogenesis.

Nivedita Saxena, Ka-Wai Mok, Michael Rendl

Open access · bronzeAbstract readReview
In one paragraph

Review in Experimental dermatology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 92 papers.

0numbers the graph read from it
0cells of the map it votes in
92citing papers in PubMed
19.7field-weighted citation impact, top 1% 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

92 citing papers in PubMed, 153 citations in OpenAlex.

  1. Article
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  4. Convergence of external and internal stressors on a stress-responsive enhancer of theProceedings of the National Academy of Sciences of the United States of America · 2026
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  20. A Chemically Defined Culture for Tooth Reconstitution.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Article

32 more citing papers are in PubMed but not listed here.

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

3 authors at 1 institution in 1 country.

Nivedita SaxenaBlack Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, New York.
Ka-Wai MokBlack Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, New York.
Michael RendlBlack Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, New York, New York.ORCID 0000-0001-6326-620X
Icahn School of Medicine at Mount Sinai · US

Funding

Specification, Molecular Control and Niche Functions of the Hair Follicle MesenchymeR01AR071047 · NIAMS · ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI · PI RENDL, MICHAEL · 2016 to 2025
$4.8M
Dermal Papilla Regulation and Function for Stem Cell Activation in the Hair CycleR01AR073259 · NIAMS · ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI · PI RENDL, MICHAEL · 2019 to 2023
$2.4M
Exploring How Dermal Papilla Precursors Regulate Hair Follicle FormationR01AR063151 · NIAMS · ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI · PI RENDL, MICHAEL · 2013 to 2017
$1.8M
Dermatology FoundationIrma T. Hirschl TrustNew York State Department of Health NYSTEM-C029574New York State Department of Health NYSTEM-C32561GGNIAMS NIH HHS R01 AR063151NIAMS NIH HHS R01 AR071047
6 · The paper itself

Abstract

Hair follicle (HF) formation in developing embryonic skin requires stepwise signalling between the epithelial epidermis and mesenchymal dermis, and their specialized derivatives, the placode/germ/peg and dermal condensate/papilla, respectively. Classically, distinct stages of HF morphogenesis have been defined, in the mouse model, based on (a) changes in cell morphology and aggregation; (b) expression of few known molecular markers; (c) the extent of follicle downgrowth; and (d) the presence of differentiating cell types. Refined genetic strategies and recent emerging technologies, such as live imaging and transcriptome analyses of isolated cell populations or single cells, have enabled a closer dissection of the signalling requirements at different stages of HF formation, particularly early on. They have also led to the discovery of precursor cells for placode, dermal condensate and future bulge stem cells that, combined with molecular insights into their fate specification and subsequent formation, serve as novel landmarks for early HF morphogenetic events and studies of the signalling networks mediating these processes. In this review, we integrate the emergence of HF precursor cell states and novel molecular markers of fate and formation to update the widely used 20-year-old seminal classification guide of HF morphogenetic stages by Paus et al. We then temporally describe the latest insights into the early cellular and molecular events and signalling requirements for HF morphogenesis in relation to one another in a holistic manner.

Indexed as

AnimalsHair FollicleHumansMorphogenesisSignal Transductionclassificationdermal condensatedermal papillaguidehair follicle morphogenesisplacode progenitorsstem cell niche

Identifiers

PMID30887615
PMCPMC7137758
OpenAlexW2922979833

What OpenQuestion holds

Textmetadata
LicenceTDM
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.