Quantification of the efficiency of cargo delivery by peptidic and pseudo-peptidic Trojan carriers using MALDI-TOF mass spectrometry |
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Authors: | Aussedat Baptiste Sagan Sandrine Chassaing Gérard Bolbach Gérard Burlina Fabienne |
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Affiliation: | Université Pierre et Marie Curie-Paris6, boite 45, 4 place Jussieu, 75252 Paris cedex 05, France. |
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Abstract: | We have measured the efficiencies of two novel pseudo-peptidic carriers and various cell-penetrating peptides (Penetratin, (Arg)9 and the third helix of the homeodomain of Knotted-1) to deliver the same cargo inside cells. The cargo that was studied corresponds to the pseudo-substrate of protein kinase C. Cargo delivery was quantified using a recent method based on isotope labeling and MALDI-TOF MS. Results of cargo delivery were compared to the amounts of free CPP internalized inside cells. The third helix of Knotted gave the best results concerning free CPP cellular uptake. It was also found to be the most efficient carrier. This peptide thus emerges as a new CPP with very promising properties. |
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