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2017 ; 45
(12
): e113
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Characterizing exogenous mRNA delivery, trafficking, cytoplasmic release and
RNA-protein correlations at the level of single cells
#MMPMID28449134
Kirschman JL
; Bhosle S
; Vanover D
; Blanchard EL
; Loomis KH
; Zurla C
; Murray K
; Lam BC
; Santangelo PJ
Nucleic Acids Res
2017[Jul]; 45
(12
): e113
PMID28449134
show ga
The use of synthetic messenger ribonucleic acid (mRNA) to express specific
proteins is a highly promising therapeutic and vaccine approach that avoids many
safety issues associated with viral or DNA-based systems. However, in order to
optimize mRNA designs and delivery, technology advancements are required to study
fundamental mechanisms of mRNA uptake and localization at the single-cell and
tissue level. Here, we present a single RNA sensitive fluorescent labeling method
which allows us to label and visualize synthetic mRNA without significantly
affecting function. This approach enabled single cell characterization of mRNA
uptake and release kinetics from endocytic compartments, the measurement of
mRNA/protein correlations, and motivated the investigation of mRNA induced
cellular stress, all important mechanisms influencing protein production. In
addition, we demonstrated this approach can facilitate near-infrared imaging of
mRNA localization in vivo and in ex-vivo tissue sections, which will facilitate
mRNA trafficking studies in pre-clinical models. Overall, we demonstrate the
ability to study fundamental mechanisms necessary to optimize delivery and
therapeutic strategies, in order to design the next generation of novel mRNA
therapeutics and vaccines.