Fig. 2

Metabolic activity measurements of MSC (a), CMC (b) and ReN (c) cultures at 24 h post labelling using 500 nm and 1000 nm MPs at a range of concentrations (a, b) including the standard 10 μg/ml dose (c). Error bars presented as SEM, n = 8 (a, b) and n = 3 (c). *P ≤ 0.05, **P ≤ 0.01, ****P ≤ 0.0001. MP magnetic particle