Abstract The outbreak of 2019 coronavirus disease (COVID‐19), caused by severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2), has resulted in a global pandemic. Despite intensive research, the current treatment options show limited curative efficacies. Here the authors report a strategy incorporating neutralizing antibodies conjugated to the surface of a photothermal nanoparticle (NP) to capture and inactivate SARS‐CoV‐2. The NP is comprised of a semiconducting polymer core and a biocompatible polyethylene glycol surface decorated with high‐affinity neutralizing antibodies. The multifunctional NP efficiently captures SARS‐CoV‐2 pseudovirions and completely blocks viral infection to host cells in vitro through the surface neutralizing antibodies. In addition to virus capture and blocking function, the NP also possesses photothermal function to generate heat following irradiation for inactivation of virus. Importantly, the NPs described herein significantly outperform neutralizing antibodies at treating authentic SARS‐CoV‐2 infection in vivo. This multifunctional NP provides a flexible platform that can be readily adapted to other SARS‐CoV‐2 antibodies and extended to novel therapeutic proteins, thus it is expected to provide a broad range of protection against original SARS‐CoV‐2 and its variants. A multifunctional neutralizing antibody‐conjugated nanoparticle is developed to capture and inactivate SARS‐CoV‐2. It efficiently captures SARS‐CoV‐2 pseudovirions and completely blocks viral infection of host cells in vitro through the surface neutralizing antibodies. In addition, its photothermal function inactivates viruses upon light irradiation. More importantly, it treats authentic SARS‐CoV‐2 infection in vivo outperforming neutralizing antibodies.
【저자키워드】 COVID‐19, SARS‐CoV‐2, virus inactivation, multifunctional nanoparticle, photothermal therapy, 【초록키워드】 Treatment, coronavirus disease, viruses, neutralizing antibody, viral infection, coronavirus, Neutralizing antibodies, Proteins, in vitro, severe acute respiratory syndrome Coronavirus, virus, variants, Polymer, COVID‐19, SARS‐CoV‐2, global pandemic, Viral, outbreak, inactivation, therapeutic, Research, 2019 coronavirus disease, Neutralizing, respiratory, in vivo, Intensive, platform, Polyethylene glycol, capture, host cells, host cell, captures, glycol, acute respiratory syndrome, acute respiratory syndrome coronavirus, acute respiratory syndrome coronavirus 2, irradiation, treat, SARS‐CoV‐2 infection, heat, SARS‐CoV‐2 antibodies, block, pseudovirion, flexible, described, caused, significantly, addition, generate, provide, expected, multifunctional, curative, SARS‐CoV‐2 antibody, 【제목키워드】 SARS‐CoV‐2, nanoparticle,