Fig. 4.

Stability of coaxially-printed microbubble gene delivery vehicles. A Representative microscopy images of coaxially-bioprinted HEK293T-laden 4% w/v alginate filaments containing microbubbles from 0-48 hr, in samples kept incubated at 37 °C (top row) and at room temperature (RT, bottom row). B Quantification of microbubble stability over time in 4% w/v alginate in samples incubated at 37 °C and at room temperature. C Representative fluorescence image of bioprinted filament containing microbubbles and Hoechst stained HEK293T cells