Figure 2.

Relative cell viability of PDLCs (a) and SH-SY5Y cells (b) on the hydrogels 1, 4, 7, and 14 days after cell seeding. The viability was normalized to the value measured on the dopamine-free (DA₀) gel on day 1. In case of the SH-SY5Y cells, a logarithmic scale was applied, as this cell line originates from a tumor and it grows much faster than the PDLC cells. * significant difference (p < 0.05) compared to the DA₀ gel at the same time point. # significant difference (p < 0.05) compared to the same gel type at the previous time point.