Batch EE ± SD (%) Size ± SD (nm) PI ± SD Zeta potential ± SD (mV) Lysozyme-loaded NPs 76 ± 5 381 ± 68 0.14 ± 0.05 -29 ± 2.6 TGFβ1-loaded NPs 50 ± 7 345 ± 35 0.13 ± 0.03 -28 ± 1.3 *EE: encapsulation efficiency; SD: standard deviation; PI: mean polydispersity index expressed using a 0-1 scale (n=3)

Table 1: Characterization of PLGA nanoparticles prepared by phase separation*.