R(q) is the Rayleigh ratio at a specific measurement angle. By measuring R(q) for a set of θ and C p , values of M w and

A 2 were estimated from typical Zimm plots. ADR releasing profile A dialysis bag (molecular weight cutoff 1 kDa) containing 3 mL PC-ADR solution before or after UV irradiation was respectively put in a beaker with 500 mL PBS. The beaker was fixed in a water buy PF-3084014 bath kept at 37°C with continues siring. About 500 μL PBS solution outside the dialysis bag was sampled at different time intervals, which was measured by UV at 480 nm to determine the ADR concentration. The cumulative drug release was calculated by the following function: Serum stability evaluation by DLS For evaluating the effect of UV irradiation on the liposomal stability,

a bovine serum albumin (BSA) solution in RPMI 1640 with a concentration of 50% (m/v) was used as an in vitro serum model to mimic the in vivo status. Then, the irradiation (irrad) and non-irrad liposome solutions were separately mixed with the resulting serum model at 37°C for 24 h. The dynamic light scattering (DLS) was used to measure the size and size distribution profile of BSA/liposome mixture at 0 and 24 h, respectively. Cellular uptake and internalization assays Raji and Daudi cells were seeded into a 48-well microplate selleck chemical (1 × 105 cells) and incubated with 1 μg/mL free ADR, ADR-loaded liposomes decorated with Fab fragments (PC-ADR-Fab), Phloretin or BSA (PC-ADR-BSA) in cell AG-881 in vitro culture medium containing 1% (v/v) antibiotics at 37°C

for 4 h. Cells incubated with culture medium were used as a negative control. After washing with PBS for twice, a FACScan Flow Cytometer (Becton Dickinson, San Jose, CA, USA) was used to assess the cellular uptake of ADR or ADR-loaded liposomes by detecting the mean fluorescence intensity (MFI) of FL-2 (ADR fluorescence). Additionally, each sample was also visualized using an inverse fluorescent microscopy. In vitrocytotoxicity assay Cytotoxicity assessment was carried out on Raji and Daudi cells using a Cell Counting Kit-8 (CCK-8, Beyotime Institute of Biotechnology, Shanghai, China) assay. Briefly, cells were seeded in a 96-well plate at an initial density of 3,000 cells/well in 100 μL of RPMI-1640 supplemented with 10% (v/v) heat-inactivated FBS, 1% (v/v) antibiotics, and different concentrations of free ADR, PC-ADR-BSA, or PC-ADR-Fab or the corresponding concentration of rituximab Fab. After 48 h, 10 μL CCK-8 was added to each well for another 2-h incubation protected from light.