Transcriptomic analysis of the submandibular gland under psychological stress condition.

Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 2024 Feb

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Psychological stress is associated with changes in salivary flow and composition. However, studies to show the effect of psychological stress on the transcriptome of the salivary gland are limited. This study aims to perform a transcriptomic analysis of the submandibular gland under psychological stress using a chronic restraint stress model of rats. Sprague-Dawley rats were divided into stress groups and control groups. Psychological stress was induced in the stress group rats by enclosing them in a plastic tube for 4 h daily over 6 weeks. RNA sequencing was performed on RNA extracted from the submandibular gland. The differentially expressed genes were identified, and the genes of interest were further validated using qRT-PCR, immunofluorescence, and western blot. A comparison between control and stress groups showed 45 differentially expressed genes. The top five altered genes in RNA sequencing data showed similar gene expression in qRT-PCR validation. The most downregulated gene in the stress group, FosB, was a gene of interest and was further validated for its protein-level expression using immunofluorescence and western blot. The genesets for gene ontology cellular component, molecular function, and KEGG showed that pathways related to ribosome biosynthesis and function were downregulated in the stress group compared to the control. Psychological stress showed transcriptomic alteration in the submandibular gland. The findings may be important in understanding stress-related oral diseases. © 2024 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Citation

Durga Paudel, Osamu Uehara, Sarita Giri, Tetsuro Morikawa, Koki Yoshida, Takao Kitagawa, Dedy Ariwansa, Nisha Acharya, Kazunori Ninomiya, Yasuhiro Kuramitsu, Tohru Ohta, Masanobu Kobayashi, Yoshihiro Abiko. Transcriptomic analysis of the submandibular gland under psychological stress condition. Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology. 2024 Feb;53(2):150-158