Medicinal Chemistry - Fusion of Traditional and Western Medicine

Volume: 1

First Edition

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Medicinal Chemistry - Fusion of Traditional and Western Medicine is a textbook intended for students taking courses in the various fields of medicinal chemistry, pharmacy, medical and dental ...
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How New Drugs are Developed: Improve the Lead Compound

Pp. 163-176 (14)

Robert E. Smith


To improve the lead compound, chemists can design rational drug. They can systematically alter the structure of the lead compound to yield different compounds that are more effective and present fewer side effects. The structures of compounds drawn in silico can be docked to the target proteins and interaction energies calculated. Databases of biochemical and medicinal interactions can be evaluated using network theory to find new targets for therapy. Computer programs can be used to calculate molecular and quantum mechanical descriptors, which can be correlated to the measured properties in a quantitative structure-activity relationship, or QSAR. Other tools of rational drug design are to model molecular structures and their binding to potential targets, to perform combinatorial synthesis and high throughput screening for any of a number of biological effects. One can also look for the genetic cause of a disease and a way to deliver the correct gene into the patient in gene therapy.


Rational drug design, QSAR, combinatorial synthesis, high throughput screening, Once the pharmacokinetics and toxicokinetics of a lead compound has been identified, the next step is to try to find an improved lead compound that is more effective, has fewer side effects and has lower toxicity.


Adjunct Assistant Professor Park University and Consultant Science Advisor United States Food and Drug Administration (FDA) USA