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. 2025 Oct;24(10):1653-1663.
doi: 10.1038/s41563-024-02114-5. Epub 2025 Feb 17.

Blood-brain-barrier-crossing lipid nanoparticles for mRNA delivery to the central nervous system

Affiliations

Blood-brain-barrier-crossing lipid nanoparticles for mRNA delivery to the central nervous system

Chang Wang et al. Nat Mater. 2025 Oct.

Abstract

The systemic delivery of mRNA molecules to the central nervous system is challenging as they need to cross the blood-brain barrier (BBB) to reach into the brain. Here we design and synthesize 72 BBB-crossing lipids fabricated by conjugating BBB-crossing modules and amino lipids, and use them to assemble BBB-crossing lipid nanoparticles for mRNA delivery. Screening and structure optimization studies resulted in a lead formulation that has substantially higher mRNA delivery efficiency into the brain than those exhibited by FDA-approved lipid nanoparticles. Studies in distinct mouse models show that these BBB-crossing lipid nanoparticles can transfect neurons and astrocytes of the whole brain after intravenous injections, being well tolerated across several dosage regimens. Moreover, these nanoparticles can deliver mRNA to human brain ex vivo samples. Overall, these BBB-crossing lipid nanoparticles deliver mRNA to neurons and astrocytes in broad brain regions, thereby being a promising platform to treat a range of central nervous system diseases.

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Conflict of interest statement

Competing interests: Y.D. is a scientific advisor in Arbor Biotechnologies, Sirnagen Therapeutics and Moonwalk Biosciences, and also a co-founder and holds equity in Immunanoengineering Therapeutics. J.P. is a current employee of Biogen with salary and stock options. P.C.P. is a current employee of City Therapeutics with salary and stock options. The other authors declare no competing interests.

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