2.9. Confocalmicroscopyanalysis
For the visualization of NHDF cells within CAH (3% agarose–1.5% chitosan), 10×103 cells/mL were seeded in -Slide 8 well Ibidi imaging plates (Ibidi GmbH, Germany) in contact with hydrogel. After 24h, cells were fixed with 4% paraformaldehyde (PFA) in PBS for 20min and then stained with 1 L of Propidium Iodide (PI) (1 mg/mL) during 15 min, at 37 ◦ C. Imaging experiments were performed in a Zeiss LSM 710 laser scanning confocal microscope (CLSM) (Carl Zeiss SMT Inc., USA), where consecutive z-stacks were acquired. 3D reconstruction and image analysis was performed in Zeiss Zen 2010 (Gaspar et al., 2011; Lima et al., 2013).