dna-nanotechnology
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The $85 Million Bet That a DNA Scaffold Can Make Gene Therapy Re-Dosable
Code Biotherapeutics is trying to turn DNA into the FedEx network for genetic medicine. Its modular 3DNA scaffold promises bigger payloads, precise addresses and repeat delivery - but the public evidence is still preclinical.
Feng Xuan
Feng Xuan is a Boston-based scientist-entrepreneur and the co-founder and CEO of Spear Bio, a biotechnology company building ultra-sensitive immunoassays for protein research and early disease diagnostics. He invented the company's core SPEAR (Successive Proximity Extension Amplification Reaction) technology as a Technology Development Fellow at Harvard's Wyss Institute, translating a decade of research in molecular and immuno-diagnostics into a platform that can measure minute quantities of protein biomarkers from sub-microliter samples. Under his leadership, Spear Bio raised an oversubscribed $45 million Series A in 2024 and earned FDA Breakthrough Device Designation for a blood-based pTau 217 test aimed at early Alzheimer's disease detection.