DNA Barcoding Enhances Gene Therapy Delivery Efficiency

Researchers at Oregon State University (OSU) have made significant strides in gene therapy by employing DNA barcoding to identify which gene-therapy nanoparticles successfully target cells in vivo. This groundbreaking study, led by graduate student Antony Jozić and published in _Nature Biotechnology_, addresses a critical challenge in genetic therapies: ensuring that therapeutic materials reach their intended cellular destinations without being degraded.

Gene therapies often face obstacles as they enter cells, frequently being directed to lysosomes, where they are broken down before they can exert their therapeutic effects. The OSU team developed a novel method to measure, for the first time in living organisms, the success rates of various gene-carrying nanoparticles in avoiding destruction and effectively delivering their cargo to target sites within cells.

Under the guidance of Professor Gaurav Sahay, Jozić and his collaborators from institutions including OHSU, Tennessee Technological University, Yeungnam University in South Korea, and the University of Brest in France, created a DNA-based barcoding test. This test allowed them to quantify the efficiency of different nanoparticle designs in delivering genetic material to its intended location, marking a significant advancement in the field.

The research team discovered that ionizable lipids, which can change their charge based on the surrounding acidity, play a crucial role in the effectiveness of lipid nanoparticles. By utilizing the insights gained from their measurements, the researchers successfully designed a new class of lipid nanoparticles that enable powerful gene editing at lower doses than previously possible, thus enhancing the potential for safer and more effective gene therapies.