Evidence map›Paper›PMID 34588305›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Matrix stiffness drives stromal autophagy and promotes formation of a protumorigenic niche.

Anna Hupfer, Anna Brichkina, Anke Koeniger, Corinna Keber, Carsten Denkert, Petra Pfefferle, Frederik Helmprobst, Axel Pagenstecher, Alexander Visekruna, Matthias Lauth

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers.

0numbers the graph read from it
0cells of the map it votes in
64citing papers in PubMed
6.3field-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

64 citing papers in PubMed, 92 citations in OpenAlex.

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  5. PIEZO1 enhances pancreatic cancer neurotropism.Cancer cell international · 2026
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  12. Characterization of Corneal Defects in ATG7-Deficient Mice.International journal of molecular sciences · 2025
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4 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

10 authors at 1 institution in 1 country.

Anna HupferCenter for Tumor and Immune Biology, Clinic of Gastroenterology, Endocrinology, Metabolism and Infectiology, Philipps University Marburg, Marburg, 35043, Germany.
Anna BrichkinaCenter for Tumor and Immune Biology, Clinic of Gastroenterology, Endocrinology, Metabolism and Infectiology, Philipps University Marburg, Marburg, 35043, Germany.ORCID 0000-0001-8707-9900
Anke KoenigerCenter for Tumor and Immune Biology, Clinic of Gastroenterology, Endocrinology, Metabolism and Infectiology, Philipps University Marburg, Marburg, 35043, Germany.
Corinna KeberInstitute of Pathology, Philipps University Marburg, Marburg, 35043, Germany.ORCID 0000-0002-4312-1377
Carsten DenkertInstitute of Pathology, Philipps University Marburg, Marburg, 35043, Germany.ORCID 0000-0002-2249-0982
Petra PfefferleBiobank Core Facility, Philipps University Marburg, Marburg, 35043, Germany.
Frederik HelmprobstElectron Microscopy Core Facility, Department of Neuropathology, Philipps University Marburg, Marburg, 35043, Germany.ORCID 0000-0001-7704-2848
Axel PagenstecherElectron Microscopy Core Facility, Department of Neuropathology, Philipps University Marburg, Marburg, 35043, Germany.ORCID 0000-0001-9627-6439
Alexander VisekrunaInstitute of Medical Microbiology, Philipps University Marburg, Marburg, 35043, Germany.ORCID 0000-0002-5207-9545
Matthias LauthCenter for Tumor and Immune Biology, Clinic of Gastroenterology, Endocrinology, Metabolism and Infectiology, Philipps University Marburg, Marburg, 35043, Germany; lauth@staff.uni-marburg.de.
Philipps University of Marburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Increased stiffness of solid tissues has long been recognized as a diagnostic feature of several pathologies, most notably malignant diseases. In fact, it is now well established that elevated tissue rigidity enhances disease progression and aggressiveness and is associated with a poor prognosis in patients as documented, for instance, for lung fibrosis or the highly desmoplastic cancer of the pancreas. The underlying mechanisms of the interplay between physical properties and cellular behavior are, however, not very well understood. Here, we have found that switching culture conditions from soft to stiff substrates is sufficient to evoke (macro) autophagy in various fibroblast types. Mechanistically, this is brought about by stiffness-sensing through an Integrin αV-focal adhesion kinase module resulting in sequestration and posttranslational stabilization of the metabolic master regulator AMPKα at focal adhesions, leading to the subsequent induction of autophagy. Importantly, stiffness-induced autophagy in stromal cells such as fibroblasts and stellate cells critically supports growth of adjacent cancer cells in vitro and in vivo. This process is Integrin αV dependent, opening possibilities for targeting tumor-stroma crosstalk. Our data thus reveal that the mere change in mechanical tissue properties is sufficient to metabolically reprogram stromal cell populations, generating a tumor-supportive metabolic niche.

Indexed as

AnimalsAutophagyCell LineExtracellular MatrixFibroblastsFibrosisFocal AdhesionsIntegrin alphaVMiceNeoplasmsNIH 3T3 CellsPancreasStromal CellsIntegrin alphaVAMPKautophagyITGAVpancreatic stellate cellstumor stroma

Identifiers

PMID34588305
PMCPMC8501848
OpenAlexW3204267641

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.