3 research outputs found
Bioorthogonal Copper Free Click Chemistry for Labeling and Tracking of Chondrocytes <i>In Vivo</i>
Establishment
of an appropriate cell labeling and tracking method
is essential for the development of cell-based therapeutic strategies.
Here, we are introducing a new method for cell labeling and tracking
by combining metabolic gylcoengineering and bioorthogonal copper-free
Click chemistry. First, chondrocytes were treated with tetraacetylated
N-azidoacetyl-d-mannosamine (Ac<sub>4</sub>ManNAz) to generate
unnatural azide groups (-N<sub>3</sub>) on the surface of the cells.
Subsequently, the unnatural azide groups on the cell surface were
specifically conjugated with near-infrared fluorescent (NIRF) dye-tagged
dibenzyl cyclooctyne (DBCO-650) through bioorthogonal copper-free
Click chemistry. Importantly, DBCO-650-labeled chondrocytes presented
strong NIRF signals with relatively low cytotoxicity and the amounts
of azide groups and DBCO-650 could be easily controlled by feeding
different amounts of Ac<sub>4</sub>ManNAz and DBCO-650 to the cell
culture system. For the <i>in vivo</i> cell tracking, DBCO-650-labeled
chondrocytes (1 × 10<sup>6</sup> cells) seeded on the 3D scaffold
were subcutaneously implanted into mice and the transplanted DBCO-650-labeled
chondrocytes could be effectively tracked in the prolonged time period
of 4 weeks using NIRF imaging technology. Furthermore, this new cell
labeling and tracking technology had minimal effect on cartilage formation <i>in vivo</i>
Bioorthogonal Copper Free Click Chemistry for Labeling and Tracking of Chondrocytes <i>In Vivo</i>
Establishment
of an appropriate cell labeling and tracking method
is essential for the development of cell-based therapeutic strategies.
Here, we are introducing a new method for cell labeling and tracking
by combining metabolic gylcoengineering and bioorthogonal copper-free
Click chemistry. First, chondrocytes were treated with tetraacetylated
N-azidoacetyl-d-mannosamine (Ac<sub>4</sub>ManNAz) to generate
unnatural azide groups (-N<sub>3</sub>) on the surface of the cells.
Subsequently, the unnatural azide groups on the cell surface were
specifically conjugated with near-infrared fluorescent (NIRF) dye-tagged
dibenzyl cyclooctyne (DBCO-650) through bioorthogonal copper-free
Click chemistry. Importantly, DBCO-650-labeled chondrocytes presented
strong NIRF signals with relatively low cytotoxicity and the amounts
of azide groups and DBCO-650 could be easily controlled by feeding
different amounts of Ac<sub>4</sub>ManNAz and DBCO-650 to the cell
culture system. For the <i>in vivo</i> cell tracking, DBCO-650-labeled
chondrocytes (1 × 10<sup>6</sup> cells) seeded on the 3D scaffold
were subcutaneously implanted into mice and the transplanted DBCO-650-labeled
chondrocytes could be effectively tracked in the prolonged time period
of 4 weeks using NIRF imaging technology. Furthermore, this new cell
labeling and tracking technology had minimal effect on cartilage formation <i>in vivo</i>
Bioorthogonal Copper Free Click Chemistry for Labeling and Tracking of Chondrocytes <i>In Vivo</i>
Establishment
of an appropriate cell labeling and tracking method
is essential for the development of cell-based therapeutic strategies.
Here, we are introducing a new method for cell labeling and tracking
by combining metabolic gylcoengineering and bioorthogonal copper-free
Click chemistry. First, chondrocytes were treated with tetraacetylated
N-azidoacetyl-d-mannosamine (Ac<sub>4</sub>ManNAz) to generate
unnatural azide groups (-N<sub>3</sub>) on the surface of the cells.
Subsequently, the unnatural azide groups on the cell surface were
specifically conjugated with near-infrared fluorescent (NIRF) dye-tagged
dibenzyl cyclooctyne (DBCO-650) through bioorthogonal copper-free
Click chemistry. Importantly, DBCO-650-labeled chondrocytes presented
strong NIRF signals with relatively low cytotoxicity and the amounts
of azide groups and DBCO-650 could be easily controlled by feeding
different amounts of Ac<sub>4</sub>ManNAz and DBCO-650 to the cell
culture system. For the <i>in vivo</i> cell tracking, DBCO-650-labeled
chondrocytes (1 × 10<sup>6</sup> cells) seeded on the 3D scaffold
were subcutaneously implanted into mice and the transplanted DBCO-650-labeled
chondrocytes could be effectively tracked in the prolonged time period
of 4 weeks using NIRF imaging technology. Furthermore, this new cell
labeling and tracking technology had minimal effect on cartilage formation <i>in vivo</i>