TY - JOUR
T1 - Bioorthogonal Labeling, Bioimaging, and Photocytotoxicity Studies of Phosphorescent Ruthenium(II) Polypyridine Dibenzocyclooctyne Complexes
AU - Tang, Tommy Siu Ming
AU - Yip, Alex Man Hei
AU - Zhang, Kenneth Yin
AU - Liu, Hua Wei
AU - Wu, Po Lam
AU - Li, King Fai
AU - Cheah, Kok Wai
AU - Lo, Kenneth Kam Wing
N1 - Publisher Copyright:
© 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - The synthesis, characterization, photophysics, lipophilicity, and cellular properties of new phosphorescent ruthenium(II) polypyridine complexes functionalized with a dibenzocyclooctyne (DIBO) or amine moiety [Ru(N^N)2(L)](PF6)2 are reported (L=4-(13-N-(3,4:7,8-dibenzocyclooctyne-5-oxycarbonyl) amino-4,7,10-trioxa-tridecanyl-aminocarbonyl-oxy-methyl)-4′-methyl-2,2′-bipyridine bpy-DIBO, N^N=2,2′-bipyridine bpy (1a), 1,10-phenanthroline phen (2a); L=4-(13-amino-4,7,10-trioxa-tridecanylaminocarbonyl-oxy-methyl)-4′-methyl-2,2′-bipyridine bpy-NH2, N^N=bpy (1b), phen (2b)). The strain-promoted alkyne-azide cycloaddition (SPAAC) reaction of the DIBO complexes 1a and 2a with benzyl azide were studied. Also, the DIBO complexes 1a and 2a can selectively label N-azidoglycans located on the surface of CHO-K1 and A549 cells that were pretreated with 1,3,4,6-tetra-O-acetyl-N-azidoacetyl-D-mannosamine (Ac4ManNAz). Additionally, the intracellular trafficking and localization of these biomolecules were monitored using laser-scanning confocal microscopy. Interestingly, the biolabeling and cellular uptake efficiency of the DIBO complexes 1a and 2a were cell-line dependent, as revealed by flow cytometry and ICP-MS. Furthermore, the complexes showed good biocompatibility toward the Ac4ManNAz-pretreated cells in the dark, but exhibited photoinduced cytotoxicity due to the generation of singlet oxygen. Tracing of cell-surface glycans: New azide-reactive phosphorescent ruthenium(II) polypyridine dibenzocyclooctyne (DIBO) complexes were designed to selectively label and visualize N-azidoglycans of 1,3,4,6-tetra-O-acetyl-N-azidoacetyl-D-mannosamine (Ac4ManNAz)-pretreated cells (see figure).
AB - The synthesis, characterization, photophysics, lipophilicity, and cellular properties of new phosphorescent ruthenium(II) polypyridine complexes functionalized with a dibenzocyclooctyne (DIBO) or amine moiety [Ru(N^N)2(L)](PF6)2 are reported (L=4-(13-N-(3,4:7,8-dibenzocyclooctyne-5-oxycarbonyl) amino-4,7,10-trioxa-tridecanyl-aminocarbonyl-oxy-methyl)-4′-methyl-2,2′-bipyridine bpy-DIBO, N^N=2,2′-bipyridine bpy (1a), 1,10-phenanthroline phen (2a); L=4-(13-amino-4,7,10-trioxa-tridecanylaminocarbonyl-oxy-methyl)-4′-methyl-2,2′-bipyridine bpy-NH2, N^N=bpy (1b), phen (2b)). The strain-promoted alkyne-azide cycloaddition (SPAAC) reaction of the DIBO complexes 1a and 2a with benzyl azide were studied. Also, the DIBO complexes 1a and 2a can selectively label N-azidoglycans located on the surface of CHO-K1 and A549 cells that were pretreated with 1,3,4,6-tetra-O-acetyl-N-azidoacetyl-D-mannosamine (Ac4ManNAz). Additionally, the intracellular trafficking and localization of these biomolecules were monitored using laser-scanning confocal microscopy. Interestingly, the biolabeling and cellular uptake efficiency of the DIBO complexes 1a and 2a were cell-line dependent, as revealed by flow cytometry and ICP-MS. Furthermore, the complexes showed good biocompatibility toward the Ac4ManNAz-pretreated cells in the dark, but exhibited photoinduced cytotoxicity due to the generation of singlet oxygen. Tracing of cell-surface glycans: New azide-reactive phosphorescent ruthenium(II) polypyridine dibenzocyclooctyne (DIBO) complexes were designed to selectively label and visualize N-azidoglycans of 1,3,4,6-tetra-O-acetyl-N-azidoacetyl-D-mannosamine (Ac4ManNAz)-pretreated cells (see figure).
KW - bioorthogonal labeling
KW - cell-surface glycan recycling
KW - imaging agents
KW - photocytotoxicity
KW - ruthenium
UR - http://www.scopus.com/inward/record.url?scp=84936996884&partnerID=8YFLogxK
U2 - 10.1002/chem.201501040
DO - 10.1002/chem.201501040
M3 - Journal article
C2 - 26096074
AN - SCOPUS:84936996884
SN - 0947-6539
VL - 21
SP - 10729
EP - 10740
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
IS - 30
ER -