Volume 61, Issue 2 e202113671
Communication

Virus-Mimicking Cell Membrane-Coated Nanoparticles for Cytosolic Delivery of mRNA

Joon Ho Park

Joon Ho Park

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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Animesh Mohapatra

Animesh Mohapatra

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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Jiarong Zhou

Jiarong Zhou

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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Maya Holay

Maya Holay

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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Nishta Krishnan

Nishta Krishnan

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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Dr. Weiwei Gao

Dr. Weiwei Gao

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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Dr. Ronnie H. Fang

Corresponding Author

Dr. Ronnie H. Fang

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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Prof. Liangfang Zhang

Corresponding Author

Prof. Liangfang Zhang

Department of NanoEngineering, Chemical Engineering Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093 USA

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First published: 25 October 2021
Citations: 89

Graphical Abstract

Cell membrane-coated nanoparticles are engineered to express a viral fusion protein, thus enabling them to exhibit improved endosomal escape properties. It is demonstrated that these virus-mimicking nanocarriers are able to deliver mRNA payloads to the cytosolic compartment after cellular uptake, enhancing expression of the encoded proteins both in vitro and in vivo.

Abstract

Effective endosomal escape after cellular uptake represents a major challenge in the field of nanodelivery, as the majority of drug payloads must localize to subcellular compartments other than the endosomes in order to exert activity. In nature, viruses can readily deliver their genetic material to the cytosol of host cells by triggering membrane fusion after endocytosis. For the influenza A virus, the hemagglutinin (HA) protein found on its surface fuses the viral envelope with the surrounding membrane at endosomal pH values. Biomimetic nanoparticles capable of endosomal escape were fabricated using a membrane coating derived from cells engineered to express HA on their surface. When evaluated in vitro, these virus-mimicking nanoparticles were able to deliver an mRNA payload to the cytosolic compartment of target cells, resulting in the successful expression of the encoded protein. When the mRNA-loaded nanoparticles were administered in vivo, protein expression levels were significantly increased in both local and systemic delivery scenarios. We therefore conclude that utilizing genetic engineering approaches to express viral fusion proteins on the surface of cell membrane-coated nanoparticles is a viable strategy for modulating the intracellular localization of encapsulated cargoes.

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