Evidence map›Paper›PMID 36627269›Full record

ArticleNature communications2023

Age-related matrix stiffening epigenetically regulates α-Klotho expression and compromises chondrocyte integrity.

Hirotaka Iijima, Gabrielle Gilmer, Kai Wang, Allison C Bean, Yuchen He, Hang Lin, Wan-Yee Tang, Daniel Lamont, Chia Tai, Akira Ito and 3 more

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 63 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
63citing papers in PubMed, 2 pooled it
26.6field-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

63 citing papers in PubMed, 2 syntheses or guidelines pooled it, 108 citations in OpenAlex.

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  20. Machine-learning models based on histological images from healthy donors identify imageQTLs and predict chronological age.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

13 authors at 5 institutions in 2 countries.

Hirotaka IijimaDepartment of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA. iijima@met.nagoya-u.ac.jp.ORCID 0000-0001-5504-1502
Gabrielle GilmerMedical Scientist Training Program, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.ORCID 0000-0002-9039-4183
Kai WangDepartment of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA.ORCID 0000-0001-8447-6177
Allison C BeanDepartment of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA.
Yuchen HeDepartment of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Hang LinDepartment of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.ORCID 0000-0002-0781-6630
Wan-Yee TangDepartment of Environmental and Occupational Health, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA.
Daniel LamontPetersen Institute of Nanoscience and Engineering, University of Pittsburgh, Pittsburgh, PA, USA.ORCID 0000-0002-5547-5674
Chia TaiDepartment of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.ORCID 0000-0003-4378-9964
Akira ItoDepartment of Motor Function Analysis, Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Jeffrey J JonesProteome Exploration Laboratory, Beckman Institute, California Institute of Technology, Pasadena, CA, USA.ORCID 0000-0002-7142-2222
Christopher EvansDepartment of Physical Medicine & Rehabilitation, Mayo Clinic, Rochester, MN, USA.ORCID 0000-0001-5532-2347
Fabrisia AmbrosioDepartment of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA. fambrosio@mgh.harvard.edu.ORCID 0000-0002-5497-5968
University of Pittsburgh · USHarvard University · USKyoto University · JPCalifornia Institute of Technology · USMayo Clinic in Arizona · US

Funding

TRAINING PROGRAM FOR MD/PHD STUDENTST32GM008208 · NIGMS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI STEINMAN, RICHARD A · 1987 to 2021
$15.4M
Technology Development P2CHD086843 · NICHD · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI AMBROSIO, FABRISIA · 2015 to 2024
$10.5M
Role of extracellular matrix in age-related declines of muscle regenerationR01AG061005 · NIA · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI AMBROSIO, FABRISIA, LEDUC, PHILIP R · 2019 to 2023
$2.5M
The Anti-Aging Role of Klotho in Skeletal Muscle RegenerationR01AG052978 · NIA · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI AMBROSIO, FABRISIA · 2017 to 2020
$2.0M
NIA NIH HHS R01 AG052978NIA NIH HHS R01 AG061005NICHD NIH HHS P2C HD086843NIGMS NIH HHS T32 GM008208
6 · The paper itself

Abstract

Extracellular matrix stiffening is a quintessential feature of cartilage aging, a leading cause of knee osteoarthritis. Yet, the downstream molecular and cellular consequences of age-related biophysical alterations are poorly understood. Here, we show that epigenetic regulation of α-Klotho represents a novel mechanosensitive mechanism by which the aged extracellular matrix influences chondrocyte physiology. Using mass spectrometry proteomics followed by a series of genetic and pharmacological manipulations, we discovered that increased matrix stiffness drove Klotho promoter methylation, downregulated Klotho gene expression, and accelerated chondrocyte senescence in vitro. In contrast, exposing aged chondrocytes to a soft matrix restored a more youthful phenotype in vitro and enhanced cartilage integrity in vivo. Our findings demonstrate that age-related alterations in extracellular matrix biophysical properties initiate pathogenic mechanotransductive signaling that promotes Klotho promoter methylation and compromises cellular health. These findings are likely to have broad implications even beyond cartilage for the field of aging research.

Indexed as

Cartilage, ArticularKlotho ProteinsOsteoarthritis, KneeCartilageChondrocytesEpigenesis, GeneticHumansKlotho ProteinsKL protein, human

Identifiers

PMID36627269
PMCPMC9832042
OpenAlexW4315481316

What OpenQuestion holds

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LicenceCC BY
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.