Abstract
Objectives
To investigate molecular and clinical background of associations among oral health, muscle and bone metabolism, and frailty incidence in patients with fall and fracture history.
Materials and methods
In total, 88 elderly participants (mean age 71.9 ± 5.8 years) with the distal radius fractures were included. Participants were divided into three groups based on an Oral Health Assessment Tool score. Fried criteria and Mini-nutritional assessments were adopted to diagnose frailty and malnutrition, respectively. Blood samples were collected and analyzed for serum levels of bone turnover markers, proteins, insulin-like growth factor-1, 25-hydroxyvitamin D, and inflammatory cytokines. The mRNA levels of markers of inflammation, muscle synthesis and wasting, and muscle homeostasis regulator in the pronator quadratus muscle were analyzed.
Results
Patients with deteriorated oral health demonstrated a higher prevalence of frailty and malnutrition. Significantly lower serum levels of total protein and higher concentrations of tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) were detected in patients with poor oral health. Significant interaction effects between oral health and frailty level in gait speed, serum TNF-α, IL-1β, and total protein levels were exhibited. Significantly different mRNA expression levels in the pronator quadratus muscle of TNF-α, IL-1β, NF kB, MYOG, and FOXO1 following the oral health were detected.
Conclusion
This study highlights relationship between oral health, nutritional uptake, systemic inflammation, and their combined impact on muscle and bone metabolism, ultimately affecting frailty development in the aging populations.
Clinical relevance
A comprehensive understanding of mutual interactions among oral health, nutrition, and inflammation is essential for managing frailty.
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Data availability
The data of this study are available from the corresponding author upon reasonable request.
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Funding
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (No. 2020R1I1A1A01071537).
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Conceptualization: SWH, JHK; data curation: SWH, KK; formal analysis: JHB, JHK; funding acquisition: JHK; investigation: SWH, JHK; methodology: JHB, JHK; software: KK; validation: SWH, JHK; visualization: SWH, KK; writing—original draft: SWH, JHK; writing—review and editing: all authors.
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The Institutional Review Board of the University Hospital approved the research protocol (KBSMC-2022–01-006). All participants provided informed consents.
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Hong, S.W., Baek, JH., Kim, K. et al. Complex interplay of oral health, muscle and bone metabolism, and frailty in older individuals. Clin Oral Invest 28, 116 (2024). https://doi.org/10.1007/s00784-024-05521-9
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DOI: https://doi.org/10.1007/s00784-024-05521-9