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The molecular genetics of cardiovascular disease: clinical implications
1Centre for Cardiovascular Genetics, British Heart Foundation Laboratories, Department of Medicine, University College London, The Rayne Building, 5 University Street, London WC1E 6JJ, UK. rmhajst@ucl.ac.uk
Insights
Genetic factors like apolipoprotein E, lipoprotein lipase, and interleukin-6 interact with environmental risks such as smoking to influence coronary heart disease (CHD). Understanding these gene-environment interactions is key for improved risk assessment and potential therapeutic targets.
Area of Science:
- Genetics
- Cardiovascular Disease
- Environmental Health
Background:
- Coronary heart disease (CHD) is a leading global cause of mortality.
- CHD arises from complex gene-gene and gene-environment interactions.
- Candidate genes and environmental factors like smoking significantly contribute to CHD risk.
Purpose of the Study:
- To review evidence on apolipoprotein E, lipoprotein lipase, and interleukin-6 in CHD.
- To examine the interaction between these genes and smoking as an environmental risk factor.
- To highlight the importance of genetic research in CHD risk assessment and identifying therapeutic targets.
Main Methods:
- Review of existing scientific literature on genetic polymorphisms and CHD.
- Analysis of gene-environment interactions, specifically focusing on smoking.
- Discussion of the role of functional gene polymorphisms in metabolic pathways and disease risk.
Main Results:
- Apolipoprotein E, lipoprotein lipase, and interleukin-6 are implicated in CHD development.
- Gene-environment interactions, particularly with smoking, modify CHD risk.
- Understanding genetic contributions enhances risk assessment beyond traditional factors.
Conclusions:
- Functional gene polymorphisms play a crucial role in CHD susceptibility and intermediate phenotypes.
- Identifying genetic factors and their interactions can lead to novel therapeutic and diagnostic strategies.
- Advances in genomic technologies will accelerate research into genetic physiology and environmental interactions.
Abstract:
Coronary heart disease (CHD) is one of the main leading causes of death worldwide. CHD is a complex condition resulting from numerous gene-gene and gene-environment interactions. A large number of candidate genes exist. We review the evidence for the role of apolipoprotein E, lipoprotein lipase and interleukin-6 in CHD and their interaction with smoking (an environmental risk). The main objective of genetic research into CHD is to provide a complete risk assessment, complementing the well-studied traditional clinical and biochemical risk factors. Unravelling the role that functional gene polymorphisms play in determining risk, and in determining the levels of intermediate phenotypes is crucial to our understanding of the key metabolic pathways and physiology not only in the diseased, but also in the disease-free state. The identification of new molecules (implicated in the relevant metabolic pathways) may subsequently lead to potential targets for therapeutic intervention. Improving our molecular understanding may also lead to the development of improved diagnostics. Sequencing of the entire genome is now a reality. Advances in technology, such as the development of "gene chips" may allow us to study 100 000 genes at a time on a single chip. Such advances will amplify the power available to us in the realms of research into genetic physiology and interaction with environmental stimuli. The insights that these novel approaches may yield are eagerly awaited.