Lead inhibits the odontogenic differentiation potential of dental pulp stem cells by affecting WNT1/ß-catenin signaling and related miRNAs expression.
Toxicol In Vitro
; 83: 105422, 2022 Sep.
Article
in En
| MEDLINE
| ID: mdl-35738543
ABSTRACT
Lead (Pb) is ubiquitous in environment that accumulates in teeth and calcified tissues from where it releases gradually with aging and adversely affects dental health. This study aimed to determine the effect of Pb exposure on odontogenic differentiation potential of isolated human dental pulp stem cells and investigate the possible underlying epigenetic factors. In the absence of Pb exposure, stem cells displayed significant odontogenic markers including elevated Alkaline Phosphatase (ALP) activity, Alizarin red staining intensity, and increased expression of odontogenic DMP1 and DSPP genes. Exposure to 60 µM Pb resulted in reduced ALP activity and calcium deposition. Also, diminished expression of RUNX2, DMP1, and DSPP, as well as Wnt signaling mediators including WNT1, and ß-catenin were detected. The expression of Wnt signaling related microRNAs, miRNA-139-5p and miRNA-142-3p, on the other hand, were shown to have a significant increase. We concluded that Pb could adversely affect the odontogenic differentiation potential of dental pulp stem cell. The underlying mechanism might related to Pb-induced epigenetic dysregulation of WNT1/ß-catenin pathway-related miRNAs leading to down-regulation of Wnt/ß-catenin related odontogenic genes and eventually impaired odontogenic differentiation process.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Stem Cells
/
MicroRNAs
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Beta Catenin
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Wnt Signaling Pathway
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Lead
Limits:
Humans
Language:
En
Journal:
Toxicol In Vitro
Journal subject:
TOXICOLOGIA
Year:
2022
Document type:
Article
Affiliation country:
Irán