Britannica Sources used in this answer

How does biochemistry help scientists develop new drugs?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Diagram showing how epinephrine binding to a beta-adrenergic receptor on a cell membrane activates a G-protein, which then stimulates adenylyl cyclase to convert ATP into cyclic AMP (cAMP), leading to physiological effects such as increased heart rate, blood vessel dilation, and glycogen breakdown. — Biochemistry In biochemistry, researchers study the chemical substances and processes that occur in living organisms and cells. In particular, various processes by which cells gain energy, such as epinephrine-stimulated cAMP synthesis, have been deduced through the study of biochemistry.

Biochemistry plays a fundamental role in drug development by providing the molecular insights necessary to design therapeutic agents that interact precisely with biological systems. By studying the molecular basis of life, biochemists identify specific pathways and enzymes involved in disease, allowing for the creation of targeted treatments.12

Key methods in this process include:

Enzyme Inhibition: Many drugs are designed as enzyme inhibitors that interfere with the metabolism of invasive agents or host cells. For example, antimetabolites like methotrexate compete with natural substrates for an enzyme's active site, effectively disrupting processes like DNA synthesis in cancer cells.234
Structure-Activity Relationship (SAR): Scientists synthesize and test structurally related compounds to determine how minor chemical modifications affect biological activity. This approach helps identify which substitutions create effective agonists or antagonists.5
Computer-Aided Design (CAD): Using sophisticated software, researchers can model the interaction between a new molecule and its target receptor or enzyme before synthesis, significantly increasing the efficiency of the discovery process.6
Pharmacokinetic Investigation: Biochemists study how drugs are absorbed, distributed, metabolized, and excreted, ensuring that new treatments are safe and effective at appropriate dosages.7