Evidence map›Paper›PMID 27423691›Full record

ArticleRespiratory research2016

Detection and quantification of epithelial progenitor cell populations in human healthy and IPF lungs.

N F Smirnova, A C Schamberger, S Nayakanti, R Hatz, J Behr, O Eickelberg

Open access · goldAbstract read
In one paragraph

Article in Respiratory research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 82 papers.

0numbers the graph read from it
0cells of the map it votes in
82citing papers in PubMed
7.7field-weighted citation impact, top 2% 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

82 citing papers in PubMed, 136 citations in OpenAlex.

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  14. From Epithelium to Therapy: Transitional Cells in Lung Fibrosis.American journal of respiratory cell and molecular biology · 2025
    Review
  15. Article
  16. Effect of FLASH proton therapy on primary bronchial epithelial cell organoids.Clinical and translational radiation oncology · 2025
    Article
  17. Article
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22 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

6 authors at 4 institutions in 1 country.

N F SmirnovaComprehensive Pneumology Center, Institute of Lung Biology and Disease, University Hospital, Ludwig-Maximilians-University and Helmholtz Zentrum München, Max-Lebsche-Platz 31, Munich, 81377, Germany.
A C SchambergerComprehensive Pneumology Center, Institute of Lung Biology and Disease, University Hospital, Ludwig-Maximilians-University and Helmholtz Zentrum München, Max-Lebsche-Platz 31, Munich, 81377, Germany.
S NayakantiComprehensive Pneumology Center, Institute of Lung Biology and Disease, University Hospital, Ludwig-Maximilians-University and Helmholtz Zentrum München, Max-Lebsche-Platz 31, Munich, 81377, Germany.
R HatzThoraxchirurgisches Zentrum, Klinik für Allgemeine, Viszeral, Transplantations, Gefäß- und Thoraxchirurgie, Klinikum Großhadern, Ludwig-Maximilians-Universität, Munich, Germany.
J BehrAsklepios Fachkliniken München-Gauting, Munich, Germany.
O EickelbergComprehensive Pneumology Center, Institute of Lung Biology and Disease, University Hospital, Ludwig-Maximilians-University and Helmholtz Zentrum München, Max-Lebsche-Platz 31, Munich, 81377, Germany. oliver.eickelberg@helmholtz-muenchen.de.
Ludwig-Maximilians-Universität München · DEAsklepios Fachkliniken München-Gauting · DEGerman Center for Lung Research · DEHelmholtz Zentrum München · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn the human lung, epithelial progenitor cells in the airways give rise to the differentiated pseudostratified airway epithelium. In mice, emerging evidence confers a progenitor function to cytokeratin 5 (KRT5(+)) or cytokeratin 14 (KRT14(+))-positive basal cells of the airway epithelium. Little is known, however, about the distribution of progenitor subpopulations in the human lung, particularly about aberrant epithelial differentiation in lung disease, such as idiopathic pulmonary fibrosis (IPF).

methodsHere, we used multi-color immunofluorescence analysis to detect and quantify the distribution of airway epithelial progenitor subpopulations in human lungs obtained from healthy donors or IPF patients.

resultsIn lungs from both, healthy donors and IPF patients, we detected KRT5(+)KRT14(-), KRT5(-)KRT14(+) and KRT5(+)KRT14(+) populations in the proximal airways. KRT14(+) cells, however, were absent in the distal airways of healthy lungs. In IPF, we detected a dramatic increase in the amount of KRT5(+) cells and the emergence of a frequent KRT5(+)KRT14(+) epithelial population, in particular in distal airways and alveolar regions. While the KRT14(-) progenitor population exhibited signs of proper epithelial differentiation, as evidenced by co-staining with pro-SPC, aquaporin 5, CC10, or MUC5B, the KRT14(+) cell population did not co-stain with bronchial/alveolar differentiation markers in IPF.

conclusionsWe provide, for the first time, a quantitative profile of the distribution of epithelial progenitor populations in human lungs. We show compelling evidence for dysregulation and aberrant differentiation of these populations in IPF.

Indexed as

Aquaporin 5BiomarkersCase-Control StudiesCell DifferentiationCells, CulturedCell SeparationEndothelial Progenitor CellsFemaleFluorescent Antibody TechniqueHumansIdiopathic Pulmonary FibrosisKeratin-14Keratin-5LungMaleMiddle AgedAQP5 protein, humanAquaporin 5BiomarkersKeratin-14Keratin-5KRT14 protein, humanKRT5 protein, humanMUC5B protein, humanMucin-5BBasal cellsEpitheliumHuman explantsProgenitor cellsSubpopulations

Identifiers

PMID27423691
PMCPMC4947297
OpenAlexW2469289450

What OpenQuestion holds

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LicenceCC BY
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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.