کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1368532 981701 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and evaluation of fluorescent Pam3Cys peptide conjugates
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis and evaluation of fluorescent Pam3Cys peptide conjugates
چکیده انگلیسی

Chirally pure R- and S-epimers of TLR2 ligand Pam3CysSK4 were prepared and separately conjugated to an OVA model epitope, in which lysine was replaced by azidonorleucine. The azide function in the conjugate permitted labelling with different fluorophores by use of strain-promoted 3+2 cycloaddition. The R-epimer of the labelled conjugates induced TLR2-dependent DC maturation, while S-epimer proved to be inactive. Combining the lipophilicity of Pam3CysSK4 ligand with fluorophores influenced the solubility of the resulting conjugates in an unpredictable way and only the conjugates labelled with Cy-5 were suitable for confocal fluorescence microscopy experiments. It was shown that both epimers of the Cy-5 labelled lipopeptides were internalized equally well, indicating TLR2-independent cellular uptake. The presented results demonstrate the usefulness of strain-promoted azide-alkyne cycloaddition in the labelling of highly lipophilic lipopeptides without disturbing the in vitro activity of these conjugates with respect to activation of TLR-2.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioorganic & Medicinal Chemistry Letters - Volume 26, Issue 15, 1 August 2016, Pages 3641–3645
نویسندگان
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