One key obstacle to crafting effective gene therapies is the ability to tailor dosing according to a patient’s needs. This can be tricky because even if protein production is successful, staying within the therapeutic window is paramount—too much of a protein could be toxic, and too little will not produce the desired effect. This balance is difficult to achieve with current technologies. In a study recently published in Nature Biotechnology, researchers at Baylor College of Medicine investigated a possible solution to this problem, engineering a molecular “on/off” switch that could regulate gene expression and maintain protein production at dose-dependent, therapeutic levels.

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