ArticlePhysiological reports2026
Thyroid dysfunction alters gut microbiota composition and alveolar bone levels in female mice.
Article in Physiological reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Thyroid hormone dysfunction has been implicated in both bone metabolism and gut microbial composition, yet the interplay between thyroid status, gut microbiota, and alveolar bone homeostasis remains unclear. In this study, female C57BL/6J mice were treated with triiodothyronine (T3) and thyroxine (T4) to induce hyperthyroidism or with methimazole (MMI) to induce hypothyroidism. Hyperthyroid mice exhibited decreased alveolar bone levels, measured as greater root exposure between the cementoenamel junction (CEJ) and alveolar bone crest (ABC) (buccal: 41% increase, p = 1.566e-07, 1-β = 1.0; lingual: 8% increase, p = 0.011, 1-β = 0.71) relative to controls, whereas hypothyroid mice exhibited reduced root exposure (buccal: 23% decrease, p = 0.020, 1-β = 0.65; lingual: 11% decrease, p = 0.011, 1-β = 0.74) relative to controls. 16S rDNA sequencing revealed that both hyper- and hypothyroid treatments reduced gut microbial diversity and altered community composition. These findings indicate that thyroid dysfunction can influence both gut microbiota and alveolar bone homeostasis, suggesting a potential gut-thyroid-bone axis. Further investigation is needed to elucidate the mechanistic links between endocrine status, microbial metabolites, and bone remodeling.
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