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Hyperhomocysteinemia as a risk factor for the neuronal system disorders
M Petras1, Z Tatarkova, M Kovalska
1Department of Medical Biochemistry, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, Slovakia. drgova@jfmed.uniba.sk.
Summary
Elevated homocysteine (Hcy) levels contribute to cardiovascular and neurodegenerative diseases. This study links hyperhomocysteinemia to increased oxidative stress and cellular damage, suggesting Hcy may be a causative agent.
Area of Science:
- Biochemistry
- Neuroscience
- Cardiovascular Science
Background:
- Elevated homocysteine (Hcy) is linked to cardiovascular diseases, stroke, and neurodegenerative disorders like Alzheimer's.
- The exact role of Hcy as a marker versus a causative agent in these pathologies remains unclear.
Purpose of the Study:
- To review homocysteine metabolism and causes of hyperhomocysteinemia.
- To investigate the role of oxidative stress and free radicals in Hcy-related pathologies.
Main Methods:
- Review of existing literature on homocysteine metabolism and genetics.
- Experimental data from hyperhomocysteinemic rat models showing increased oxidative stress.
Main Results:
- Hyperhomocysteinemia in rats demonstrated increased oxidative stress.
- Hcy-induced imbalance between auto-oxidation, reactive metabolites, and antioxidant defense leads to cytotoxicity.
Conclusions:
- Homocysteine's cytotoxic effects involve oxidizing membrane lipids and proteins, causing structural and functional cell modifications.
- Understanding Hcy's toxic mechanisms may lead to improved therapeutics for brain tissue and related disorders.
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