Details

Autor(en) / Beteiligte

• Young, Rachel E.
• Nelson, Katherine M.
• Hofbauer, Samuel I.
• Vijayakumar, Tara
• Alameh, Mohamad-Gabriel
• Weissman, Drew
• Papachristou, Charalampos
• Gleghorn, Jason P.
• Riley, Rachel S.

Titel

Systematic development of ionizable lipid nanoparticles for placental mRNA delivery using a design of experiments approach

Ist Teil von

• Bioactive materials, 2024-04, Vol.34, p.125-137

Ort / Verlag

China: Elsevier B.V

Erscheinungsjahr

2024

Quelle

Elektronische Zeitschriftenbibliothek

Beschreibungen/Notizen

• Ionizable lipid nanoparticles (LNPs) have gained attention as mRNA delivery platforms for vaccination against COVID-19 and for protein replacement therapies. LNPs enhance mRNA stability, circulation time, cellular uptake, and preferential delivery to specific tissues compared to mRNA with no carrier platform. However, LNPs are only in the beginning stages of development for safe and effective mRNA delivery to the placenta to treat placental dysfunction. Here, we develop LNPs that enable high levels of mRNA delivery to trophoblasts in vitro and to the placenta in vivo with no toxicity. We conducted a Design of Experiments to explore how LNP composition, including the type and molar ratio of each lipid component, drives trophoblast and placental delivery. Our data revealed that utilizing C12-200 as the ionizable lipid and 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE) as the phospholipid in the LNP design yields high transfection efficiency in vitro. Analysis of lipid molar composition as a design parameter in LNPs displayed a strong correlation between apparent pKa and poly (ethylene) glycol (PEG) content, as a reduction in PEG molar amount increases apparent pKa. Further, we present one LNP platform that exhibits the highest delivery of placental growth factor mRNA to the placenta in pregnant mice, resulting in synthesis and secretion of a potentially therapeutic protein. Lastly, our high-performing LNPs have no toxicity to both the pregnant mice and fetuses. Our results demonstrate the feasibility of LNPs as a platform for mRNA delivery to the placenta, and our top LNP formulations may provide a therapeutic platform to treat diseases that originate from placental dysfunction during pregnancy. [Display omitted] •C12-200 and DOPE increase transfection efficiency of mRNA in trophoblasts.•Reduction in PEG molar amount increases apparent pKa of LNPs.•LNPs deliver therapeutic mRNA to the placenta in pregnant mice.•LNPs exhibit no toxicity to fetuses.