Mini Nutritional Assessment Scores Indicate Higher Risk for Prospective Mortality and Contrasting Correlation With...

Area of Science:

• Epigenetics
• Gerontology
• Nutritional Science

Background:

• Epigenetic landscapes change throughout life, influenced by environmental factors.
• The Mini Nutritional Assessment (MNA) is a standard tool for evaluating malnutrition in the elderly.
• Previous research linked specific DNA methylation patterns to chronological and biological aging.

Purpose of the Study:

• To investigate the association between nutritional status, assessed by MNA, and epigenetic biomarkers related to aging.
• To determine if malnutrition affects the same DNA methylation sites correlated with aging.

Main Methods:

• Utilized data from previous studies on methylation biomarkers associated with aging.
• Assessed nutritional status using the Mini Nutritional Assessment (MNA) tool.
• Analyzed correlations between MNA scores and global/gene-specific DNA methylation levels.

Main Results:

• Malnutrition showed a positive correlation with global DNA methylation.
• Most gene-specific methylation sites linked to aging were unaffected by malnutrition.
• Some sites showed correlations with malnutrition opposite to those seen with frailty.

Conclusions:

• Malnutrition may be an early indicator of disability and age-related decline, triggering generalized epigenetic remodeling.
• Specific epigenetic changes related to aging appear largely independent of malnutrition.
• Malnutrition is a survival risk in the elderly, partially separate from the molecular aging process.