Evidence map›Paper›PMID 26108578›Full record

ArticleScientific reports2015

Mechanical overloading causes mitochondrial superoxide and SOD2 imbalance in chondrocytes resulting in cartilage degeneration.

Masato Koike, Hidetoshi Nojiri, Yusuke Ozawa, Kenji Watanabe, Yuta Muramatsu, Haruka Kaneko, Daichi Morikawa, Keiji Kobayashi, Yoshitomo Saita, Takahisa Sasho and 4 more

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 108 papers.

0numbers the graph read from it
0cells of the map it votes in
108citing papers in PubMed
10.5field-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

108 citing papers in PubMed, 155 citations in OpenAlex.

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48 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

14 authors at 2 institutions in 1 country.

Masato KoikeDepartment of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.
Hidetoshi NojiriDepartment of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Yusuke OzawaDepartment of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.
Kenji WatanabeDepartment of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.
Yuta MuramatsuDepartment of Orthopaedics, Chiba University Graduate School of Medicine, Chiba, Japan.
Haruka KanekoDepartment of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Daichi MorikawaDepartment of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Keiji KobayashiDepartment of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Yoshitomo SaitaDepartment of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Takahisa SashoDepartment of Orthopaedics, Chiba University Graduate School of Medicine, Chiba, Japan.
Takuji ShirasawaDepartment of Aging Control Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Koutaro YokoteDepartment of Clinical Cell Biology and Medicine' Chiba University Graduate School of Medicine, Chiba, Japan.
Kazuo KanekoDepartment of Orthopaedics, Juntendo University Graduate School of Medicine, Tokyo, Japan.
Takahiko ShimizuDepartment of Advanced Aging Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.
Chiba University · JPJuntendo University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mechanical stress and aging are major risk factors of cartilage degeneration. Human studies have previously reported that oxidative damage increased, while SOD2 protein was reciprocally downregulated in osteoarthritic degenerated cartilage. However, it remains unclear whether mitochondrial superoxide imbalance in chondrocytes causes cartilage degeneration. We herein demonstrate that mechanical loading promoted mitochondrial superoxide generation and selective Sod2 downregulation in chondrocytes in vivo and that mitochondrial superoxide inducer also downregulated Sod2 expression in chondrocytes in vitro. A genetically manipulated model revealed that Sod2 deficiency in chondrocytes also resulted in mitochondrial superoxide overproduction and dysfunction, thus leading to cartilage degeneration. Intra-articular injection of a permeable antioxidant effectively suppressed the mechanical loading-induced mitochondrial superoxide generation and cartilage degeneration in mice. Our findings demonstrate that mitochondrial superoxide plays a pivotal role in the development and progression of osteoarthritis, and the mitochondrial superoxide balance may therefore be a promising target for the treatment of cartilage degeneration.

Indexed as

AnimalsAntioxidantsAscorbic AcidBlotting, WesternCartilage, ArticularCartilage DiseasesCells, CulturedChondrocytesGene ExpressionHerbicidesHumansInjections, Intra-ArticularMice, Inbred C57BLMice, KnockoutMice, TransgenicMicroscopy, ElectronAntioxidantsAscorbic AcidHerbicidesParaquatSuperoxide DismutaseSuperoxide Dismutase 2Superoxides

Identifiers

PMID26108578
PMCPMC4480010
OpenAlexW2395528532

What OpenQuestion holds

Textmetadata
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.