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Tail length of triazine-based lipids influences blood clotting risk in vitro and in vivo

Ibnat, N.; Masud, A. A.; Mory, J.; Funk, T.; Mahmood, D. F.; Wood, J.; Venditto, V. J.

2026-08-26 bioengineering
10.64898/2026.08.25.747137 bioRxiv
Show abstract

Lung-targeted delivery of mRNA with lipid nanoparticles (LNPs) demonstrates high potential for therapeutic applications in pulmonary disorders. However, progress in pulmonary mRNA therapeutics is constrained by the challenges of engineering lipids that are both safe and highly effective at targeting the lungs. To meet these critical needs, we designed triazine-based (TZ) ionizable lipids with cyanuric chloride as the linker between the cationic head and the lipophilic tail, which allows for easy derivatization capable of systemic mRNA delivery. Three TZ-based lipids were synthesized using the same ionizable headgroups while differing in the carbon tail length and evaluated for their in vitro and in vivo protein expression. Notably, all three lipids result in pulmonary expression after intravenous administration, but the TZ lipid containing a C14 tail does so without any indication of thrombosis, both in vitro and in vivo as compared to other formulations. Our findings highlight the effect of minor chemical modifications driving altered in vivo activity, thus enabling new opportunities for safe pulmonary delivery of mRNA for lung-related diseases.

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"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.