Membrane Capacitance from a Bioimpedance Approach: Associations with Insulin Resistance in Relatively Healthy Adults

Area of Science:

• Biomedical Engineering
• Metabolic Health
• Bioelectrical Medicine

Background:

• Insulin resistance (IR) and metabolic syndrome (MetS) are significant health concerns.
• Cell membrane capacitance (CM) is a bioelectrical parameter reflecting cell membrane function.
• Understanding the relationship between CM and metabolic disorders is crucial for early detection and management.

Purpose of the Study:

• To investigate the association between higher membrane capacitance (CM) and the presence of insulin resistance (IR) and/or metabolic syndrome (MetS).
• To explore CM as a potential biomarker for cell membrane dysfunction in metabolic diseases.

Main Methods:

• Cross-sectional analysis of 2,191 healthy adults from the National Health and Nutrition Examination Survey.
• Comparison of CM levels between groups with low/no disease risk, IR, MetS, or both IR and MetS using ANCOVA.
• Assessment of associations between CM and clinical measures (waist circumference, fasting insulin) using multiple linear regression.

Main Results:

• Individuals with IR, with or without MetS, exhibited significantly higher CM compared to those with low/no disease risk.
• No significant difference in CM was observed for individuals with MetS alone.
• CM showed positive associations with waist circumference and fasting insulin levels.

Conclusions:

• Elevated CM is associated with insulin resistance in a healthy adult population.
• CM is not significantly associated with MetS when IR is absent.
• CM may serve as a potential indicator of IR-related cell membrane dysfunction, warranting further investigation.