Matrix Gla protein species and risk of cardiovascular events in type 2 diabetic patients
Geertje W Dalmeijer1, Yvonne T van der Schouw, Elke J Magdeleyns
1Corresponding author: Geertje W. Dalmeijer, g.w.dalmeijer@umcutrecht.nl.
Insights
Higher levels of desphospho-uncarboxylated matrix Gla protein (dp-ucMGP) are linked to increased cardiovascular disease (CVD) risk in type 2 diabetes patients, particularly peripheral arterial disease and heart failure. This suggests a potential role for vitamin K status in CVD risk.
Area of Science:
- Cardiovascular Medicine
- Endocrinology
- Nutritional Science
Background:
- Type 2 diabetes is a significant risk factor for cardiovascular disease (CVD).
- Matrix Gla protein (MGP) is a vitamin K-dependent protein involved in vascular calcification.
- Specific circulating MGP species may serve as biomarkers for CVD risk in diabetic populations.
Purpose of the Study:
- To examine the association between different circulating matrix Gla protein (MGP) species and the incidence of cardiovascular disease (CVD) and its subtypes in individuals with type 2 diabetes.
- To determine if specific MGP forms are predictive of CVD events in this high-risk cohort.
Main Methods:
- Prospective cohort study (EPIC-NL) of 40,011 participants, with 518 individuals with type 2 diabetes at baseline.
- Measurement of circulating MGP species (dp-ucMGP, dp-MGP, total-ucMGP) using ELISA in baseline plasma samples.
- Incident CVD and subtypes (CHD, PAD, heart failure, stroke) ascertained through national register linkage, analyzed using Cox proportional hazard models.
Main Results:
- Higher levels of circulating desphospho-uncarboxylated MGP (dp-ucMGP) were significantly associated with an increased risk of overall CVD (HRSD 1.21), peripheral arterial disease (PAD) (HRSD 1.32), and heart failure (HRSD 1.75).
- No significant association was found between higher dp-ucMGP levels and the risk of coronary heart disease (CHD) or stroke.
- Circulating desphospho-carboxylated MGP and total-uncarboxylated MGP levels were not associated with CVD or its subtypes.
Conclusions:
- Elevated circulating dp-ucMGP levels are a significant risk factor for incident CVD in type 2 diabetic patients, particularly for PAD and heart failure.
- Other measured MGP species (dp-MGP, total-ucMGP) did not show a relationship with CVD risk.
- These findings suggest that poor vitamin K status, indicated by high dp-ucMGP, may contribute to increased CVD risk in type 2 diabetes.
Objective:
To investigate the relationship of circulating matrix Gla protein (MGP) species with incident cardiovascular disease (CVD) or coronary heart disease (CHD) in type 2 diabetic patients.
Research Design And Methods:
EPIC-NL is a prospective cohort study among 40,011 Dutch men and women. At baseline (1993-1997), 518 participants were known to have type 2 diabetes. MGP levels were measured by ELISA techniques in baseline plasma samples. The incidence of fatal and nonfatal CVD and CVD subtypes-CHD, peripheral arterial disease (PAD), heart failure, and stroke-were obtained by linkage to national registers. Cox proportional hazard models were used to calculate hazard ratios (HRs), adjusted for sex, waist-to-hip ratio, physical activity, and history of CVD.
Results:
During a median 11.2 years of follow-up, 160 cases of CVD were documented. Higher circulating desphospho-uncarboxylated MGP (dp-ucMGP) levels were significantly associated with higher risk of CVD, with an HR per SD (HRSD) of 1.21 (95% CI 1.06-1.38), PAD (HRSD 1.32 [95% CI 1.07-1.65]), and heart failure (HRSD 1.75 [95% CI 1.42-2.17]) after adjustment. Higher circulating dp-ucMGP levels were not related to risk of CHD (HRSD 1.12 [95% CI 0.94-1.34]) or stroke (HRSD 1.05 [95% CI 0.73-1.49]). Circulating desphospho-carboxylated MGP and circulating total-uncarboxylated MGP levels were not associated with CVD or CVD subtypes.
Conclusions:
High dp-ucMGP levels were associated with increased CVD risk among type 2 diabetic patients, especially with the subtypes PAD and heart failure, while other MGP species were not related to CVD risk. These results suggest that a poor vitamin K status is associated with increased CVD risk.
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