Paraoxonase gene polymorphisms, oxidative stress, and diseases

Area of Science:

• Human genetics
• Biochemistry
• Molecular biology

Background:

• The paraoxonase (PON) gene cluster, comprising PON1, PON2, and PON3 on chromosome 7q21.3-22.1, has products with unclear roles in health and disease.
• Emerging evidence suggests PON proteins act as guardians against cellular damage from toxins like organophosphates and oxidized lipids.

Purpose of the Study:

• To provide an overview of research on PON1, PON2, and PON3 genes.
• To review association studies between PON gene polymorphisms and coronary heart disease (CHD) and other conditions.
• To discuss challenges in data interpretation and suggest future research directions.

Main Methods:

• Literature review of existing research on PON gene function.
• Analysis of published association studies linking PON polymorphisms to various diseases and phenotypes.
• Critical evaluation of inconsistencies in reported associations.

Main Results:

• PON gene products are implicated in protecting against cellular damage.
• PON gene polymorphisms are associated with coronary heart disease prevalence, though findings are often inconsistent across populations.
• Associations with other diseases and metabolic phenotypes (lipoproteins, glucose, birthweight) are also explored.

Conclusions:

• PON genes play a significant role in cellular protection and disease susceptibility.
• Inconsistencies in association studies highlight challenges in understanding the precise impact of PON polymorphisms.
• Further research is needed to elucidate the function of PON genetic polymorphisms in health and disease, particularly CHD.