| Autor: |
Francisco J, Aulestia, Johnny, Groeling, Guilherme H S, Bomfim, Veronica, Costiniti, Vinu, Manikandan, Ariya, Chaloemtoem, Axel R, Concepcion, Yi, Li, Larry E, Wagner, Youssef, Idaghdour, David I, Yule, Rodrigo S, Lacruz |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Science signaling. 13(619) |
| ISSN: |
1937-9145 |
| Popis: |
Fluoride ions are highly reactive, and their incorporation in forming dental enamel at low concentrations promotes mineralization. In contrast, excessive fluoride intake causes dental fluorosis, visually recognizable enamel defects that can increase the risk of caries. To investigate the molecular bases of dental fluorosis, we analyzed the effects of fluoride exposure in enamel cells to assess its impact on Ca(2+) signaling. Primary enamel cells and an enamel cell line (LS8) exposed to fluoride showed decreased internal Ca(2+) stores and store-operated Ca(2+) entry (SOCE). RNA- sequencing analysis revealed changes in gene expression suggestive of endoplasmic reticulum (ER) stress in fluoride- treated LS8 cells. Fluoride exposure did not alter Ca(2+) homeostasis or increase the expression of ER stress–associated genes in HEK-293 cells. In enamel cells, fluoride exposure affected the functioning of the ER-localized Ca(2+) channel IP(3)R and the activity of the sarco-endoplasmic reticulum Ca(2+)-ATPase (SERCA) pump during Ca(2+) refilling of the ER. Fluoride negatively affected mitochondrial respiration, elicited mitochondrial membrane depolarization, and disrupted mitochondrial morphology. Together, these data provide a potential mechanism underlying dental fluorosis. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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