Systemic inflammation in relation to exceptional memory in the Long Life Family Study (LLFS)

Area of Science:

• Gerontology
• Immunology
• Genetics

Background:

• Familial aggregation of healthy aging phenotypes, including exceptional memory (EM), has been observed in long-lived individuals.
• Systemic inflammation is implicated in aging and cognitive function.

Purpose of the Study:

• To investigate differences in systemic inflammation status and trajectory between long-lived families with and without exceptional memory (EM).

Main Methods:

• Analysis of 4333 participants from the Long Life Family Study (LLFS), classifying families as EM or non-EM.
• Measurement of inflammatory biomarkers including white blood cell counts, C-reactive protein, and interleukin-6.
• Generalized linear models used to assess cross-sectional and longitudinal differences in biomarkers between EM and non-EM families.

Main Results:

• EM families exhibited marginally higher monocyte counts at baseline, especially in men.
• Monocyte counts increased over time in both EM and non-EM families.
• Lymphocyte and platelet counts decreased over time in non-EM families but not in EM families.
• No significant differences in the rate of biomarker change over time were found between EM and non-EM families.

Conclusions:

• Higher baseline monocyte counts in EM families suggest a potential pathway for EM development, particularly in men.
• While baseline inflammation markers differ, the trajectory of systemic inflammation over time does not distinguish between EM and non-EM families in long-lived populations.