Evidence map›Paper›PMID 24606204›Full record

ArticleTissue engineering. Part A2014

Serum- and growth-factor-free three-dimensional culture system supports cartilage tissue formation by promoting collagen synthesis via Sox9-Col2a1 interaction.

Nazish Ahmed, Jonathan Iu, Chelsea E Brown, Drew Wesley Taylor, Rita A Kandel

Open access · greenAbstract read
In one paragraph

Article in Tissue engineering. Part A, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.8field-weighted citation impact, top 11% 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

18 citing papers in PubMed, 35 citations in OpenAlex.

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  10. Strategies to Modulate the Redifferentiation of Chondrocytes.Frontiers in bioengineering and biotechnology · 2021
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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

5 authors at 2 institutions in 2 countries.

Nazish Ahmed1 CIHR-BioEngineering of Skeletal Tissues Team, Mount Sinai Hospital, University of Toronto , Toronto, Canada .
Jonathan Iu
Chelsea E Brown
Drew Wesley Taylor
Rita A Kandel
University of Toronto · CAMount Sinai Hospital · CA

Funding

Biomedical Research Abroad: Vistas Open! /MHIRT (BRAVO!MHIRT)T37MD001427 · NIMHD · UNIVERSITY OF ARIZONA · PI STERLING, CHARLES R. · 2005 to 2013
$1.2M
NIMHD NIH HHS MD 001427
6 · The paper itself

Abstract

objectiveOne of the factors preventing clinical application of regenerative medicine to degenerative cartilage diseases is a suitable source of cells. Chondrocytes, the only cell type of cartilage, grown in vitro under culture conditions to expand cell numbers lose their phenotype along with the ability to generate hyaline cartilaginous tissue. In this study we determine that a serum- and growth-factor-free three-dimensional (3D) culture system restores the ability of the passaged chondrocytes to form cartilage tissue in vitro, a process that involves sox9.

methodsBovine articular chondrocytes were passaged twice to allow for cell number expansion (P2) and cultured at high density on 3D collagen-type-II-coated membranes in high glucose content media supplemented with insulin and dexamethasone (SF3D). The cells were characterized after monolayer expansion and following 3D culture by flow cytometry, gene expression, and histology. The early changes in signaling transduction pathways during redifferentiation were characterized.

resultsThe P2 cells showed a progenitor-like antigen profile of 99% CD44(+) and 40% CD105(+) and a gene expression profile suggestive of interzone cells. P2 in SF3D expressed chondrogenic genes and accumulated extracellular matrix. Downregulating insulin receptor (IR) with HNMPA-(AM3) or the PI-3/AKT kinase pathway (activated by insulin treatment) with Wortmannin inhibited collagen synthesis. HNMPA-(AM3) reduced expression of Col2, Col11, and IR genes as well as Sox6 and -9. Co-immunoprecipitation and chromatin immunoprecipitation analyses of HNMPA-(AM3)-treated cells showed binding of the coactivators Sox6 and Med12 with Sox9 but reduced Sox9-Col2a1 binding.

conclusionsWe describe a novel culture method that allows for increase in the number of chondrocytes and promotes hyaline-like cartilage tissue formation in part by insulin-mediated Sox9-Col2a1 binding. The suitability of the tissue generated via this approach for use in joint repair needs to be examined in vivo.

Indexed as

ChondrogenesisAnimalsCartilage, ArticularCattleCell Culture TechniquesCell DifferentiationCells, CulturedChondrocytesCollagen Type IICulture Media, Serum-FreeDexamethasoneInsulinIntercellular Signaling Peptides and ProteinsPhenotypeReceptor, InsulinSignal TransductionCollagen Type IICulture Media, Serum-FreeDexamethasoneInsulinIntercellular Signaling Peptides and ProteinsReceptor, InsulinSOX9 Transcription Factor

Identifiers

PMID24606204
PMCPMC4137332
OpenAlexW1814014218

What OpenQuestion holds

Textmetadata
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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.