CART delivery platform
methodology effectively complexes, delivers,
and releases mRNA via both systemic and local administration. (A)
CART electrostatic formulation, cellular uptake, endosomal escape,
and translation of SARS-CoV-2 RBD mRNA. (B) CART synthesis via ring-opening
polymerization (DBU = 1,8-diazabicyclo[5.4.0]undec-7-ene, TU = 1-(3,5-bis(trifluoromethyl)phenyl)-3-cyclohexylthiourea).
(C) CART chemical structure, degradation products, and charge-altering
mechanism. (D) In vivo luciferase reporter gene expression via systemic
IV administration (left, 5 μg of fLuc mRNA), and local IM administration
(2.5 μg of fLuc mRNA each flank). (E) Quantification of in vivo
mRNA expression at 4 h postadministration.