Evidence map›Paper›PMID 25030964›Full record

ArticleInternational orthopaedics2014

Simulated microgravity affects chondrogenesis and hypertrophy of human mesenchymal stem cells.

Susanne Mayer-Wagner, Florian Hammerschmid, Julia I Redeker, Bärbel Schmitt, Boris Michael Holzapfel, Volkmar Jansson, Oliver B Betz, Peter E Müller

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In one paragraph

Article in International orthopaedics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.0field-weighted citation impact, top 24% 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

16 citing papers in PubMed, 29 citations in OpenAlex.

  1. Review
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  6. Bioreactor Technologies for Enhanced Organoid Culture.International journal of molecular sciences · 2023
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  9. Engineered Human Meniscus in Modeling Sex Differences of Knee OsteoarthritisFrontiers in bioengineering and biotechnology · 2022
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  10. Review
  11. Tissue Engineering of Cartilage Using a Random Positioning Machine.International journal of molecular sciences · 2020
    Article
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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

8 authors at 2 institutions in 2 countries.

Susanne Mayer-WagnerDepartment of Orthopaedic Surgery, Ludwig-Maximilians-University, Campus Großhadern, Marchioninistr. 15, 81377, Munich, Germany, susanne.mayer@med.uni-muenchen.de.
Florian Hammerschmid
Julia I Redeker
Bärbel Schmitt
Boris Michael Holzapfel
Volkmar Jansson
Oliver B Betz
Peter E Müller
Ludwig-Maximilians-Universität München · DEQueensland University of Technology · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeDuring in vitro chondrogenesis of human mesenchymal stem cells (hMSCs) hypertrophy is an inadvertent event associated with cell differentiation toward the osteogenic lineage. Up to now, there is no stringent experimental control mechanism to prevent hypertrophy of MSCs. Microgravity is known to have an impact on osteogenesis. In this study, the influence of simulated microgravity (SMG) on both chondrogenesis and hypertrophy of hMSCs was evaluated.

methodsA bioreactor using a rotating wall vessel was constructed to simulate microgravity. Pellet cultures formed from hMSCs (P5) were supplemented with human transforming growth factor-β3 (TGF-β3). The hMSC pellet cultures treated with TGF-β3 were either kept in SMG or in a control system. After three weeks of culture, the chondrogenic differentiation status and level of hypertrophy were examined by safranin-O staining, immunohistochemistry and quantitative real-time PCR.

resultsSMG reduced the staining for safranin-O and collagen type II. The expression of collagen type X α1 chain (COL10A1) and collagen type II α1 chain (COL2A1) were both significantly reduced. There was a higher decrease in COL2A1 than in COL10A1 expression, resulting in a low COL2A1/COL10A1 ratio.

conclusionsSMG reduced hypertrophy of hMSCs during chondrogenic differentiation. However, the expression of COL2A1 was likewise reduced. Even more, the COL2A1/COL10A1 ratio decreased under SMG conditions. We therefore assume that SMG has a significant impact on the chondrogenic differentiation of hMSCs. However, due to the high COL2A1 suppression under SMG, this culture system does not yet seem to be suitable for a potential application in cartilage repair.

Indexed as

Weightlessness SimulationAggrecansCell DifferentiationChondrogenesisCollagen Type IICollagen Type XHumansHypertrophyImmunohistochemistryMesenchymal Stem CellsOsteogenesisReal-Time Polymerase Chain ReactionAggrecansCOL2A1 protein, humanCollagen Type IICollagen Type X

Identifiers

PMID25030964
OpenAlexW1971278836

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.