Evidence map›Paper›PMID 29306537›Full record

ArticleJournal of endodontics2018

Metformin Enhances the Differentiation of Dental Pulp Cells into Odontoblasts by Activating AMPK Signaling.

Wei Qin, Xianling Gao, Tao Ma, Michael D Weir, Jing Zou, Bing Song, Zhengmei Lin, Abraham Schneider, Hockin H K Xu

Open access · greenAbstract read
In one paragraph

Article in Journal of endodontics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.5field-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

26 citing papers in PubMed, 41 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 2 institutions in 2 countries.

Wei QinDepartment of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China; Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Medicine, Baltimore, Maryland.
Xianling GaoDepartment of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China; Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Medicine, Baltimore, Maryland.
Tao MaDepartment of Oncology and Diagnostic Sciences, University of Maryland School of Medicine, Baltimore, Maryland.
Michael D WeirDepartment of Advanced Oral Sciences and Therapeutics, University of Maryland School of Medicine, Baltimore, Maryland.
Jing ZouDepartment of Oncology and Diagnostic Sciences, University of Maryland School of Medicine, Baltimore, Maryland.
Bing SongDepartment of Advanced Oral Sciences and Therapeutics, University of Maryland School of Medicine, Baltimore, Maryland.
Zhengmei LinDepartment of Operative Dentistry and Endodontics, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, China. Electronic address: linzhm@mail.sysu.edu.cn.
Abraham SchneiderDepartment of Oncology and Diagnostic Sciences, University of Maryland School of Medicine, Baltimore, Maryland. Electronic address: schneider66@umaryland.edu.
Hockin H K XuDepartment of Advanced Oral Sciences and Therapeutics, University of Maryland School of Medicine, Baltimore, Maryland; Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, Maryland; Department of Mechanical Engineering, University of Maryland, Baltimore County, Baltimore County, Maryland. Electronic address: hxu@umaryland.edu.
University of Maryland, Baltimore · USSun Yat-sen University · CN

Funding

Injectable and Strong Nano-Apatite/Stem Cell Scaffolds for Bone RegenerationR01DE014190 · NIDCR · UNIVERSITY OF MARYLAND BALTIMORE · PI XU, HUAKUN · 2003 to 2013
$3.4M
Role of OCT-3 on metformin action in oral carcinogenesisR01DE023578 · NIDCR · UNIVERSITY OF MARYLAND BALTIMORE · PI SCHNEIDER, ABRAHAM · 2014 to 2018
$1.9M
Human Embryonic Stem Cells in Calcium Phosphate Constructs for Bone RegenerationR21DE022625 · NIDCR · UNIVERSITY OF MARYLAND BALTIMORE · PI XU, HUAKUN · 2012 to 2013
$413k
NIDCR NIH HHS R01 DE014190NIDCR NIH HHS R01 DE023578NIDCR NIH HHS R21 DE022625
6 · The paper itself

Abstract

introductionMetformin is a first-line drug for treating type 2 diabetes that regulates the differentiation of mesenchymal stem cells. Its effects on human dental pulp cells (DPCs) remain unknown. This study aimed to investigate the effects of metformin on the proliferation and differentiation of DPCs.

methodsA live/dead viability assay kit was used to examine the effects of metformin on the cell viability of DPCs. Cell proliferation was analyzed using a cell counting kit (CCK-8; Dojindo, Tokyo, Japan). Levels of phosphorylated and unphosphorylated adenosine 5'-monophosphate-activated protein kinase (AMPK) were quantified by Western blot analysis in response to metformin and the AMPK signaling inhibitor Compound C (EMD Chemicals, San Diego, CA). The effects of Compound C on the metformin-induced odontoblast differentiation of DPCs were determined by alkaline phosphatase activity assay and von Kossa staining, and the expression of odontoblastic markers was evaluated by reverse-transcription polymerase chain reaction analysis.

resultsDPCs exhibited mesenchymal stem cell characteristics using flow cytometry. Different doses of metformin were shown to be cytocompatible with DPCs, yielding >90% cell viability. None of the concentrations of metformin up to 50 μmol/L affected cell proliferation. The Western blot assay showed that DPCs express functional organic cation transporter 1, a transmembrane protein that mediates the intracellular uptake of metformin. Metformin significantly activated the AMPK pathway in a dose-dependent manner. In addition, it stimulated alkaline phosphatase activity; enhanced mineralized nodule formation; and increased the expression of odontoblastic markers including dentin sialophosphoprotein, dentin matrix protein 1, runt-related transcription factor 2, and osteocalcin. Moreover, pretreatment with Compound C, a specific AMPK inhibitor, markedly reversed metformin-induced odontoblastic differentiation and cell mineralization.

conclusionsThis study shows that metformin can induce DPC differentiation and mineralization in an AMPK-dependent manner and that this well-tolerated antidiabetic drug has potential in regenerative endodontics as well as in other regenerative applications.

Indexed as

AdultAlkaline PhosphataseAMP-Activated Protein KinasesBlotting, WesternCell DifferentiationDental PulpHumansHypoglycemic AgentsMetforminOdontoblastsReal-Time Polymerase Chain ReactionReverse Transcriptase Polymerase Chain ReactionSignal TransductionAlkaline PhosphataseAMP-Activated Protein KinasesHypoglycemic AgentsMetforminAMPKmetforminodontoblastproliferation

Identifiers

PMID29306537
PMCPMC7169970
OpenAlexW2782241719

What OpenQuestion holds

Textmetadata
LicenceTDM
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.