Where are we today with personalized medicine?

Area of Science:

• Pharmacology
• Genetics
• Personalized Medicine

Background:

• Pharmacogenetics is key to personalized medicine, aiming to tailor drug therapy based on individual genetic makeup.
• Studies have primarily focused on pharmacokinetic and pharmacodynamic processes to understand genetic influences on drug response.
• Despite the commercial availability of pharmacogenetic tests, their widespread clinical utility remains under investigation.

Purpose of the Study:

• To review the current state of pharmacogenetics in personalized medicine.
• To assess the established clinical utility of pharmacogenetic testing.
• To identify factors contributing to the variability in pharmacogenetic study findings.

Main Methods:

• Review of existing pharmacogenetics research and literature.
• Analysis of studies investigating pharmacokinetic and pharmacodynamic processes.
• Consideration of genetic and non-genetic factors influencing drug response.

Main Results:

• Pharmacogenetic testing shows limited clinical utility, with notable exceptions for immune response genes (e.g., human leukocyte antigen) and adverse drug reactions.
• Variability in research findings may stem from unexamined factors like epistasis (gene-gene and gene-environment interactions) and epigenetics.
• The role of other largely unexplored genetic factors in drug response is acknowledged.

Conclusions:

• The clinical utility of pharmacogenetic testing is not yet broadly established.
• Further research is required to explore complex genetic interactions and epigenetic factors.
• Understanding these factors is essential for advancing personalized medicine through pharmacogenetics.