A new technique for precisely targeting molecules within cells is paving the way for safer drugs that are free of side effects.
Researcher J. Julius Zhu, PhD, of the School of Medicine, and his colleagues have developed a way to manipulate molecules from compartment to compartment within individual cells. Amazingly, the same molecules do different things depending on their location, the researchers determined. By manipulating the molecules, scientists can determine exactly which locations to target with treatments, while avoiding locations that would cause harmful side effects. That will lead to safer drugs and more effective treatments.
“The problem with side effects is caused because you just could not distinguish the molecules doing different things in the same cell,” Zhu explained. “If you blocked a molecule, you blocked it regardless of what it was doing. And that usually has unwanted side effects. Almost every drug that can treat disease has side effects, either major or minor, but usually they always have something.”
More Precise Precision Medicine
Until now, drugs have targeted molecules in a very general way. If a molecule was thought to be harmful, researchers might try to develop a drug to block it entirely. But Zhu’s new work highlights the downside of that shotgun approach. A molecule might be causing problems because of what it’s doing in one part of the cell, but, at the same time, that same molecule is doing something entirely different in other parts — perhaps something tremendously important. So shutting it down entirely would be like trying to solve the problem of traffic congestion by banning cars.
Now, rather than crudely trying to block a molecule regardless of its many functions, doctors can target a specific molecule doing a specific thing in a specific location. That adds a new level of precision to the concept of precision medicine – medicine tailored exactly to a patient’s needs.
Safer Drugs and Medicines
Zhu, of UVA’s Department of Pharmacology, thinks the technique will be useful for many different diseases, but especially for cancers and neurological conditions such as autism and Alzheimer’s. Those, in particular, will benefit from a better understanding of what molecules at what locations would make good targets, he and his colleagues note in a new paper sharing their technique with other scientists.
The technique will also speed up the development of new treatments by letting researchers more quickly understand what molecules are doing and which should be targeted.
“The idea [behind the technique] is actually very simple,” Zhu said. “But it took us a lot of years to make this thing work.”
Learn more: UVA Develops Way to Create Drugs Without Side Effects
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