September 12th, 2011
Posted by Shane Climie, Ph.D.
It’s increasingly clear to anyone who deals with human health – from the bench biologist to the clinical oncologist – that humans are a heterogeneous species. As a result, a drug that works well in one individual may not work at all in another. Thus, the field of targeted (or personalized) medicine came about so doctors could optimize patient care through the use of genetic and biomarker testing. Such tests help identify patients who are (or who are not) most likely to respond to a given therapy. The field is often promoted as a way to get the “right drug to the right patient at the right dose.”
Correct dosing is critical because about 25 percent of all outpatient prescription drugs in the U.S. are taken by patients with genetic variations (specifically, polymorphisms) that affect absorption, metabolism or excretion of those drugs. Again, at risk of stating the obvious, human beings are heterogeneous.