Evidence map›Paper›PMID 31730019›Full record

ArticleStem cell research & therapy2019

Macrophage polarization in periodontal ligament stem cells enhanced periodontal regeneration.

Jiaying Liu, Bin Chen, Jun Bao, Yangheng Zhang, Lang Lei, Fuhua Yan

Abstract read
In one paragraph

Article in Stem cell research & therapy, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 104 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
104citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

104 citing papers in PubMed, 2 syntheses or guidelines pooled it.

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44 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

6 authors.

Jiaying LiuDepartment of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
Bin ChenDepartment of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
Jun BaoDepartment of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
Yangheng ZhangDepartment of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China.
Lang LeiDepartment of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China. leilangdental@163.com.
Fuhua YanDepartment of Periodontology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, 210008, China. yanfh@nju.edu.cn.ORCID 0000-0002-6963-3530

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe inflammation and regeneration process may be accompanied by the shift in the M1/M2 polarization of macrophages to adapt to extracellular signals. How the macrophages responded to the altered immunological environment in the periodontal niche after stem cell transplantation has never been explored. The purpose of present study is to investigate whether M1/M2 polarization of macrophages participated in the tissue homeostasis and wound healing during periodontal ligament stem cell (PDLSC)-based periodontal regeneration.

methodsA rat periodontal defect model was utilized to observe the regeneration process in the PDLSC transplantation-enhanced periodontal repair. Dynamic changes in the markers of M1/M2 macrophages were observed on days 3, 7, and 21 post surgery. In addition, the outcome of regeneration was analyzed on day 21 after surgery. To further investigate the effect of PDLSCs on macrophage polarization, the conditioned medium of PDLSCs was utilized to treat M0, M1, and M2 macrophages for 24 h; markers of M1/M2 polarization were evaluated in macrophages.

resultsElevated bone volume and average thickness of bone trabecular was observed in the PDLSC-treated group by micro-computed tomography on day 21. In addition, enhanced periodontal regeneration was observed in the PDLSC-treated group with cementum-like structure regeneration and collagen fiber formation, which inserted into the newly formed cementum. On day 3, PDLSC transplantation increased IL-10 level in the periodontal tissue, while decreased TNF-α in the early stage of periodontal regeneration. On day 7, enhanced CD163+ cell infiltration and heightened expression of markers of M2 macrophages were observed. Furthermore, conditioned medium from PDLSC culture induced macrophage polarization towards the anti-inflammatory phenotype by downregulating TNF-α and upregulating IL-10, Arg-1, and CD163 in vitro.

conclusionsPDLSCs could induce macrophage polarization towards the M2 phenotype, and the shift in the polarization towards M2 macrophages in the early stage of tissue repair contributed to the enhanced periodontal regeneration after stem cell transplantation. Therefore, signals from the transplanted PDLSCs might alter the immune microenvironment to enhance periodontal regeneration.

Indexed as

Cell PolarityAnimalsAntigens, CDAntigens, Differentiation, MyelomonocyticCD163 AntigenCell CountCells, CulturedCulture Media, ConditionedCytokinesInterferon-gammaInterleukin-4LipopolysaccharidesMacrophagesMaleParacrine CommunicationPeriodontal LigamentAntigens, CDAntigens, Differentiation, MyelomonocyticCD163 AntigenCulture Media, ConditionedCytokinesInterferon-gammaInterleukin-4LipopolysaccharidesReceptors, Cell SurfaceMacrophage polarizationPeriodontal ligament stem cellsPeriodontal regeneration

Identifiers

PMID31730019
PMCPMC6858751

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LicenceCC BY
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Registered trials

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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.