Evidence map›Paper›PMID 27354351›Full record

ArticleHuman molecular genetics2016

Cyclooxygenase-2 deficiency impairs muscle-derived stem cell-mediated bone regeneration via cellular autonomous and non-autonomous mechanisms.

Xueqin Gao, Arvydas Usas, Aiping Lu, Adam Kozemchak, Ying Tang, Minakshi Poddar, Xuying Sun, James H Cummins, Johnny Huard

Open access · bronzeAbstract read
In one paragraph

Article in Human molecular genetics, 2016. 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
2.0field-weighted citation impact, top 14% 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, 30 citations in OpenAlex.

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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

9 authors at 4 institutions in 1 country.

Xueqin GaoStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Arvydas UsasStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Aiping LuStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Adam KozemchakStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Ying TangStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Minakshi PoddarStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Xuying SunDepartment of Orthopaedic Surgery, Brown Institute for Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA.
James H CumminsStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
Johnny HuardStem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA, USA johnny.huard@uth.tmc.edu.
University of Pittsburgh · USThe University of Texas Health Science Center at Houston · USInstitute for Molecular Medicine · USSteadman Philippon Research Institute · US

Funding

Muscle Based Tissue Engineering to Improve Bone HealingR01DE013420 · NIDCR · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI HUARD, JOHNNY · 2001 to 2010
$3.6M
NIDCR NIH HHS R01 DE013420
6 · The paper itself

Abstract

This study investigated the role of cyclooxygenase-2 (COX-2) expression by donor and host cells in muscle-derived stem cell (MDSC)-mediated bone regeneration utilizing a critical size calvarial defect model. We found that BMP4/green fluorescent protein (GFP)-transduced MDSCs formed significantly less bone in COX-2 knock-out (Cox-2KO) than in COX-2 wild-type (WT) mice. BMP4/GFP-transduced Cox-2KO MDSCs also formed significantly less bone than transduced WT MDSCs when transplanted into calvarial defects created in CD-1 nude mice. The impaired bone regeneration in the Cox-2KO MDSCBMP4/GFP group is associated with downregulation of BMP4-pSMAD1/5 signaling, decreased osteogenic differentiation and lowered proliferation capacity after transplantation, compared with WT MDSCBMP4/GFP cells. The Cox-2KO MDSCBMP4/GFP group demonstrated a reduction in cell survival and direct osteogenic differentiation in vitro These effects were mediated in part by the downregulation of Igf1 and Igf2. In addition, the Cox-2KO MDSCBMP4/GFP cells recruited fewer macrophages than the WT MDSC/BMP4/GFP cells in the early phase after injury. We concluded that the bone regeneration capacity of Cox-2KO MDSCs was impaired because of a reduction in cell proliferation and survival capacities, reduction in osteogenic differentiation and a decrease in the ability of the cells to recruit host cells to the injury site.

Indexed as

Bone RegenerationCell DifferentiationCell ProliferationMyoblastsStem Cell TransplantationAnimalsCyclooxygenase 2MiceMice, KnockoutMice, NudeSkullCyclooxygenase 2Ptgs2 protein, mouse

Identifiers

PMID27354351
PMCPMC5179923
OpenAlexW2463670799

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.