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Protection Against Periodontitis by Improving Mitochondrial Function in Diabetes.

Satoru Onizuka1, Takanori Shinjo2, Atsushi Ishikado1

  • 1Section of Vascular Cell Biology, Dianne Nunnally Hoppes Laboratory, Joslin Diabetes Center, Harvard Medical School, Boston, MA.

Diabetes
|May 15, 2026
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Summary
This summary is machine-generated.

Diabetes impairs wound healing and increases periodontitis risk. Enhancing mitochondrial function, particularly with pyruvate kinase M2 activation, can reverse these effects, offering potential therapies for diabetic chronic wounds.

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Area of Science:

  • Oral biology
  • Metabolic disorders
  • Mitochondrial function

Background:

  • Diabetes mellitus is a significant risk factor for severe periodontitis, characterized by impaired wound healing, chronic inflammation, and infection.
  • Protective factors have been observed in individuals with long-standing type 1 diabetes, delaying severe complications like periodontitis despite hyperglycemia.

Purpose of the Study:

  • To investigate the role of mitochondrial function in periodontitis associated with diabetes.
  • To identify potential therapeutic targets for mitigating periodontal inflammation and bone loss in diabetic patients.

Main Methods:

  • Proteomic analysis of gingival tissues from individuals with and without periodontitis, considering diabetes duration and glycemic control.
  • Validation of findings in diabetic mouse models of ligature-induced periodontitis, assessing mitochondrial enzyme expression, oxygen consumption, inflammatory cytokines, and osteoclast activity.
  • Investigating the effect of pyruvate kinase M2 activation on mitochondrial function and periodontal parameters.

Main Results:

  • Diabetes was associated with reduced mitochondrial enzyme expression and function in gingival tissues, correlating with increased periodontal bone loss, inflammation (Il-1b, Il-6, Il-17a), and osteoclast activation.
  • Activation of pyruvate kinase M2 reversed diabetes-induced mitochondrial dysfunction, decreased inflammatory cytokine levels, and mitigated periodontal bone loss, even under hyperglycemic conditions.
  • Enhanced mitochondrial protein expression and function demonstrated a protective effect against periodontal inflammation and bone loss in diabetes.

Conclusions:

  • Mitochondrial dysfunction plays a key role in the pathogenesis of diabetic periodontitis.
  • Targeting mitochondrial function, specifically through pyruvate kinase M2 activation, presents a promising therapeutic strategy for managing periodontitis and chronic wound healing in diabetes.
  • These findings suggest that improving mitochondrial health can counteract detrimental effects of hyperglycemia on periodontal tissues.