2. Academic Validation
  3. Inhibition of autophagy reduces the rate of fluoride-induced LS8 apoptosis via regulating ATG5 and ATG7

Inhibition of autophagy reduces the rate of fluoride-induced LS8 apoptosis via regulating ATG5 and ATG7

  • J Biochem Mol Toxicol. 2022 Dec 19;e23280. doi: 10.1002/jbt.23280.
Lin Zhao 1,  Han Wang 1,  Sijia Liu 1,  Tao Xi 1,  Liyuan Wang 1 2,  Yang Li 1,  Lu Chen 3,  Ruan Jianping 3,  Kristina Xiao Liang 4 5
Affiliations

Affiliations

  • 1 Ningxia Key Laboratory of Cranio-maxillofacial Deformities, College of Stomatology, Ningxia Medical University, Yinchuan, China.
  • 2 Stomatological Hospital of the General Hospital of Ningxia Medical University, Yinchuan, China.
  • 3 Department of Preventive Dentistry, Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, Stomatology Hospital, Xi'an Jiaotong University, Xi'an, China.
  • 4 Neuro-SysMed, Center of Excellence for Clinical Research in Neurological Diseases, Department of Neurology, Haukeland University Hospital, Bergen, Norway.
  • 5 Department of Clinical Medicine, University of Bergen, Bergen, Norway.
PMID: 36536498 DOI: 10.1002/jbt.23280
Abstract

Excessive fluoride affects ameloblast differentiation and tooth development. The fate of fluorinated ameloblasts is determined by multiple signaling pathways in response to a range of stimuli. Both Autophagy and Apoptosis are involved in the regulation of dental fluorosis as well as in protein synthesis and enamel mineralization. Emerging evidence suggests that Autophagy and Apoptosis are interconnected and that their interaction greatly influences cell death. However, the effect of Autophagy on Apoptosis in fluoride-treated ameloblasts is unclear. Here, we employed an in vitro cellular model of fluorosis in mouse ameloblast-like LS8 cells and induced Autophagy using sodium fluoride (NaF). Our findings suggest that NaF treatment induces Autophagy in LS8 cells, and ATG5 and Atg7 are important molecules involved in this process. We also showed that NaF treatment reduced cell viability in Atg5/7 siRNA and Autophagy inhibitor-treated LS8 cells. More importantly, NaF-induced Apoptosis can be reversed by inhibiting early stage of Autophagy. In conclusion, our study shows that Autophagy is closely related to dental fluorosis, and inhibition of Autophagy, especially ATG5/7, reduces fluoride-induced cell death and Apoptosis.

Keywords

Apoptosis; LS8; NaF; autophagy.

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