Abstract
Objectives
The objective was to evaluate the effects of experimental apical periodontitis on the inflammatory, functional, biochemical, and redox parameters of the parotid and submandibular glands in rats.
Materials and methods
Twenty 12-week-old male Wistar rats were randomly divided into two groups (n = 10): a control group and apical periodontitis group. After 28 days, the saliva was collected for salivary flow rate and biochemistry composition. Both glands were sampled for quantification of the tumor necrosis factor-alpha (TNF-α) and biochemical analyses of redox state.
Results
TNF-α concentrations were higher in both salivary glands adjacent to the periapical lesions in animals with apical periodontitis and also compared to the control group. The apical periodontitis group increased the salivary amylase, chloride, potassium, calcium, and phosphate. The total oxidant capacity increased in the parotid gland adjacent to the periapical lesions in the same rat and compared to the control group. Conversely, the total antioxidant capacity of the parotid glands on both sides in the apical periodontitis group was lower than that in the control group. Furthermore, glutathione peroxidase activity increased in the submandibular gland adjacent to the apical periodontitis group compared to the control group.
Conclusions
Experimental apical periodontitis alters salivary biochemical composition, in addition to increasing inflammatory marker and inducing local disturbances in the redox state in the parotid and submandibular glands of male rats.
Clinical relevance
Apical periodontitis could exacerbate the decline in oral health by triggering dysfunction in the salivary glands.
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Data availability
No datasets were generated or analyzed during the current study.
References
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Acknowledgements
A.H.C.N. acknowledges financial support through a grant from the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior —Brasil (CAPES)—Finance Code 001; Pro-Rectory of Research of UNESP (PROPe – Unesp – Process nº 2022-5529-4) and Grant no. 2022/11532-2, São Paulo Research Foundation (FAPESP). A.R.V. was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001; L.C. was supported by the Pro-Rectory of Research of UNESP (PROPe – Unesp – Process nº 2022-5529-4) and P.P.P. was supported by Grant no. 2022/11532-2, São Paulo Research Foundation (FAPESP).
Funding
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001; Grant no. 2022/11532-2, São Paulo Research Foundation (FAPESP); and Pro-Rectory of Research of Unesp (PROPe-Unesp-Process no. 2022–5529-4-PIBIC).
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Conceptualization: A.R.V., R.R.L., S.H.P.O., L.T.Â.C., and A.H.C.N.; methodology: A.R.V., L.C., P.P.P., L.V.S., G.A.F., R.N.F., M.P.J., V.G.B.B., and A.H.C.N.; formal analysis: A.R.V., L.C., P.P.P., L.V.S., G.A.F., R.N.F., M.P.J., V.G.B.B., and A.H.C.N.; investigation: A.R.V., L.C., P.P.P., and A.H.C.N.; resources: S.H.P.O., L.T.Â.C., and A.H.C.N.; writing original draft: A.R.V., L.C., P.P.P., L.V.S., G.A.F., R.N.F., M.P.J., V.G.B.B. R.R.L., L.T.Â.C., and A.H.C.N.; supervision: A.H.C.N.; project administration: A.H.C.N.; funding acquisition: A.H.C.N.; visualization. All authors reviewed the manuscript.
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All procedures performed in studies involving animals were in accordance with the standards ARRIVE guideline. The study was approved by the Local Ethics Committee on the Use of Animals, of the Faculdade de Odontologia de Araçatuba, UNESP (No. 0374–2022).
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Vazão, A.R., Claudino, L., Pimpinato, P.P. et al. Experimental apical periodontitis alters salivary biochemical composition and induces local redox state disturbances in the salivary glands of male rats. Clin Oral Invest 28, 154 (2024). https://doi.org/10.1007/s00784-024-05540-6
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DOI: https://doi.org/10.1007/s00784-024-05540-6