Table 2.
Formulation | Method 1
|
Method 2
|
||||||
---|---|---|---|---|---|---|---|---|
Size ± SD (nm) | PDI ± SD | ZP ± SD (mV) | Ab loading (µg/mg of NP) | Size ± SD (nm) | PDI ± SD | ZP ± SD (mV) | Ab loading (µg/mg of NP) | |
Adsorption | ||||||||
0.18C-NP | 336±19 | 0.28±0.04 | −12.9±0.6 | 3.62±0.43 | 556±41 | 0.29±0.04 | −1.9±0.3 | 2.73±0.17 |
0.18C-NP+S | 567±36 | 0.47±0.06 | −2.5±0.2 | 2.64±0.21 | 311±15 | 0.32±0.04 | −2.9±0.2 | 2.11±0.67 |
0.55C-NP | 978±424 | 0.69±0.12 | −9.1±0.6 | 2.42±0.86 | 1,266±193 | 0.63±0.04 | −3.4±0.2 | 2.62±0.67 |
0.55C-NP+S | 733±52 | 0.58±0.26 | −1.2±0.1 | 1.90±0.31 | 399±143 | 0.31±0.07 | −0.4±0.1 | 2.44±0.27 |
0.15E-NP | 5,270±965 | 0.79±0.25 | 0.3±0.3 | 1.91±0.09 | 3,681±453 | 0.75±0.01 | 0.1±0.1 | 2.41±0.30 |
0.15E-NP+S | 468±14 | 0.69±0.02 | −2.3±0.7 | 3.45±0.38 | 417±51 | 0.43±0.05 | 0.2±0.1 | 3.18±0.48 |
0.55E-NP | 5,507±927 | 1.00±0.00 | −1.9±0.2 | 2.82±0.83 | 1,999±404 | 0.95±0.05 | −0.4±0.3 | 2.54±0.33 |
0.55E-NP+S | 1,946±41 | 0.97±0.04 | 0.7±0.4 | 2.94±0.46 | 544±45 | 0.39±0.07 | −1.9±0.2 | 2.31±0.57 |
Covalent | ||||||||
0.18C-NP | 426±6 | 0.41±0.02 | −2.5±0.7 | 2.51±0.22 | 349±24 | 0.34±0.04 | −9.4±0.4 | 2.70±0.61 |
0.18C-NP+S | 774±8 | 0.57±0.01 | 2.6±0.1 | 2.25±0.01 | 421±12 | 0.37±0.05 | 2.1±0.4 | 2.16±0.43 |
0.55C-NP | 1,033±20 | 0.73±0.07 | −1.6±0.5 | 3.53±0.47 | 346±15 | 0.41±0.02 | −2.6±0.3 | 2.13±1.02 |
0.55C-NP+S | 828±10 | 0.66±0.03 | −2.2±0.1 | 3.22±0.08 | 461±10 | 0.27±0.09 | 1.7±0.5 | 2.31±0.63 |
0.15E-NP | NA | NA | NA | NA | 305±156 | 0.65±0.08 | −1.1±0.2 | 1.96±0.16 |
0.15E-NP+S | NA | NA | NA | NA | 309±36 | 0.22±0.07 | 1.5±0.1 | 2.79±0.24 |
0.55E-NP | NA | NA | NA | NA | 327±22 | 0.38±0.05 | −4.1±0.2 | 2.62±0.35 |
0.55E-NP+S | NA | NA | NA | NA | 314±31 | 0.32±0.02 | 2.2±0.5 | 2.71±0.32 |
Notes: C = COOH ended PLGA; E = ester ended PLGA; S = sucrose (10%). Data are presented as mean ± standard deviation.
Abbreviations: NP, nanoparticle; PDI, polydispersity index; ZP, zeta potential; SD, standard deviation; NA, not applicable; Ab, anti-CD205 antibody; COOH, carboxylic acid; PLGA, poly(d, l-lactide co-glycolide).