RNA Size and Structure Modulate the Apparent p K a of Ionizable Lipid Nanoparticles
Academic source · Bioconjugate Chemistry
Source published:
Site published: 2026-11-03 · Updated: 2026-11-03
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What the paper reports
Across six ionizable lipids, researchers encapsulated RNAs ranging from short oligonucleotides to 4.5-kilobase mRNA and measured apparent pKa using a fluorescence assay. Both RNA length and structure altered particle ionization, with lipid-dependent shifts. The study indicates that cargo is an active formulation variable; it does not directly establish changes in therapeutic efficacy or organ targeting.
Why this paper is included
Warns against transferring pKa assumptions between RNA cargos; apparent-pKa shifts require biological validation before inferring delivery or safety changes.
The interpretation above is analysis, not a conclusion attributed to the original source.
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