Related Experiment Videos
Plasma lipoprotein(a) levels are high in patients with central retinal artery occlusion
M Murata1, T Saito, S Takahashi
1Department of Molecular Pathological Biochemistry and Biology, Yamagata University School of Medicine, Japan.
Insights
High lipoprotein(a) (Lp[a]) levels are linked to central retinal artery occlusion (CRAO). Lower molecular weight Lp(a) isoforms were associated with CRAO, suggesting a role in artery blockage.
Area of Science:
- Ophthalmology
- Cardiovascular Science
- Lipid Metabolism
Background:
- High plasma lipoprotein(a) (Lp[a]) is an established risk factor for atherosclerosis and thrombosis.
- Understanding Lp(a)'s role in retinal vascular occlusive events is crucial for disease prevention and management.
Purpose of the Study:
- To investigate the association between Lp(a) levels and molecular weights of apolipoprotein(a) (apo(a)) in patients with central retinal artery occlusion (CRAO).
- To explore the potential role of Lp(a) in the pathophysiology of CRAO.
Main Methods:
- Measurement of plasma Lp(a) concentrations in CRAO cases and controls.
- Analysis of molecular weights (MWs) of apolipoprotein(a) (apo(a)) isoforms.
- Comparison of Lp(a) levels in central retinal vein occlusion (CRVO) cases and controls.
Main Results:
- Mean Lp(a) concentration was significantly higher in CRAO cases compared to controls.
- Lp(a) levels exceeding 30 mg/dl were more prevalent in CRAO cases.
- Lp(a) concentrations showed a significant correlation with low-MW apo(a) isoforms.
- Lp(a) levels were higher in CRVO cases than controls, but this difference was not statistically significant.
Conclusions:
- Elevated Lp(a) levels, particularly low-MW isoforms, are associated with central retinal artery occlusion.
- Lp(a) may contribute to CRAO pathophysiology through impaired fibrinolysis and atherogenesis.
- High Lp(a) levels may not be significantly associated with central retinal vein occlusion, suggesting distinct pathophysiological mechanisms.
Abstract:
High plasma lipoprotein(a) (Lp[a]) concentration is an independent risk factor for atherosclerosis and thrombosis. To study the implications of Lp(a) in central retinal artery occlusion (CRAO), we examined Lp(a) levels and molecular weights (MWs) of apolipoprotein(a) (apo(a)). Mean Lp(a) concentration was significantly higher in the cases with CRAO than in the controls. Lp(a) levels higher than 30 mg/dl were also more frequent in the CRAO cases than in the controls. Lp(a) concentrations correlated significantly with low-MW isoforms of apo(a). Impaired fibrinolysis and atherogenesis induced by Lp(a) may play a role in the pathophysiology of CRAO. Since high Lp(a) levels were reported in CRVO by other investigators, patients with central retinal vein occlusion (CRVO) were also examined for Lp(a). Although Lp(a) levels were higher in the CRVO cases than in the controls, the difference was not significant. Therefore, high Lp(a) levels may not be associated with venous thrombosis and/or embolism.