Plasma homocysteine and inflammation in elderly patients with cardiovascular disease and dementia

Area of Science:

• Gerontology
• Cardiovascular Medicine
• Neurology

Background:

• Elevated plasma total homocysteine (tHcy) is implicated in cardiovascular diseases (CVD) and dementia.
• Serum C-reactive protein (sCRP) is a marker for low-grade inflammation, but its association with tHcy is unclear.
• Comorbidities like chronic obstructive pulmonary disease (CPOD) and peptic ulcer (PU) are common in older adults.

Purpose of the Study:

• To investigate the association between plasma tHcy and sCRP in older adults.
• To examine if this association differs in healthy aging, CVD, and dementia.
• To determine if comorbid CPOD or PU modifies the tHcy-sCRP relationship.

Main Methods:

• Cross-sectional study of 627 individuals aged 65+.
• Participants included healthy controls, CVD patients (with and without comorbidities), and dementia patients.
• Statistical analysis controlled for confounders like age, sex, socio-demographic status, and vascular risk factors.

Main Results:

• A significant positive association between plasma tHcy and sCRP was observed in CVD patients with comorbidities (CVD+/comorbidity+) and dementia patients (p=0.001).
• This association was independent of several potential confounders.
• No significant association was found in healthy controls or CVD patients without comorbidities (CVD+/comorbidity-).

Conclusions:

• The link between plasma tHcy and sCRP in older adults appears to be an indicator of general poor health, particularly in the presence of comorbidities.
• This association is not a specific correlate of vascular inflammation in the studied groups.
• Findings suggest a broader health status marker rather than a direct link to vascular inflammation mechanisms.