The cholinesterases: analysis by pharmacogenomics in man

Area of Science:

• Genetics and Molecular Biology
• Cardiovascular Physiology
• Metabolic Disorders

Background:

• Cholinergic pathways are crucial for cardiovascular regulation and blood pressure homeostasis.
• Cholinesterase (ChE) enzymes, including acetylcholinesterase (AChE) and butyrylcholinesterase (BChE), play roles in the nervous system.
• Understanding genetic variations in ChE may offer insights into cardiovascular function and metabolic syndrome.

Purpose of the Study:

• To investigate single nucleotide polymorphisms (SNPs) in the acetylcholinesterase (AChE) gene associated with cardiovascular function.
• To examine the correlation between butyrylcholinesterase (BChE) activity and parameters of the metabolic syndrome and cardiovascular function.
• To determine the genetic contribution to variations in ChE activity and its physiological relevance.

Main Methods:

• Spectrophotometric analysis of ChE enzymatic activity in blood samples.
• Correlation and linkage analyses using data from twin registries.
• Re-sequencing of the AChE gene to identify single nucleotide polymorphisms (SNPs).
• ACE model-fitting to assess the genetic component of ChE variation.

Main Results:

• Significant relationships were found between ChE enzyme activity and specific cardiovascular endpoints.
• BChE activity showed a high correlation with variables linked to cardiovascular risk and the metabolic syndrome.
• A suggestive linkage was observed at the BChE locus in dizygotic twins.
• Genetic factors were found to be the major source of variation in ChE activity (65%).
• Nineteen SNPs, including four nonsynonymous coding SNPs, were identified in the AChE gene.

Conclusions:

• BChE activity is closely associated with cardiovascular risk factors and metabolic syndrome parameters.
• Genetic variation significantly influences ChE activity, impacting cardiovascular health.
• Further research into AChE SNPs may elucidate their role in cardiovascular function.