[Molecular and genetic epidemiology].

Area of Science:

• Epidemiology
• Molecular Biology
• Human Genetics

Context:

• Traditional epidemiology struggles to account for genetic susceptibility in disease occurrence.
• Advances in molecular biology and human genetics enable the use of biological markers.
• Molecular epidemiology integrates genetic and environmental factors for a comprehensive view.

Purpose:

• To define molecular and genetic epidemiology.
• To classify biological markers used in molecular epidemiology: exposure, effect, and susceptibility.
• To discuss the utility of susceptibility genes, including high and low penetrance types, in epidemiologic research.

Summary:

• Molecular epidemiology utilizes biological markers to study disease distribution and determinants, offering insights beyond traditional methods.
• Biological markers are categorized into exposure, effect, and susceptibility types.
• Susceptibility genes, particularly low penetrance genes like GSTs and XRCC1, are crucial for understanding human carcinogenesis.

Impact:

• Enhances understanding of multifactorial and multistep disease occurrence.
• Highlights the importance of genetic susceptibility in disease etiology.
• Emphasizes the need for multidisciplinary collaboration among epidemiologists, molecular biologists, and human geneticists.