Inflammation Caused by Nanosized Delivery Systems: Is There a Benefit?

Abstract:

:Secondary macrophage cytotoxicity induced by nanoparticles was described before. The study aim was to investigate the role of secondary cytotoxic effect in a macrophage-lung cancer coculture model after nanoparticle treatment in the presence and absence of anti-inflammatory drugs. An in vitro coculture model composed of confluent alveolar macrophage MH-S and A-549 lung cancer cells separated by a 0.4 μm porous membrane was used in the study. Macrophages were treated with two sizes of gelatin nanoparticles and two sizes of poly(isobutyl cyanoacrylate) (PIBCA) nanoparticles, with and without doxorubicin as a chemotherapeutic drug. The treatment effect with and without the presence of anti-inflammatory drug was studied using an MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay. The model drugs were ibuprofen, celecoxib, prednisolone, dexamethasone, and methotrexate. Different nanoparticles in different sizes were synthesized with a range of physicochemical characteristics. Doxorubicin loaded nanoparticles were prepared with an entrapment efficiency of 82-83% for PIBCA and 39-42% for gelatin. Nanoparticle treatment of macrophages showed a secondary cytotoxic effect on A-549 cancer cells at 24 and 36 h, with a drop in cell viability of 40-62%. However, this effect was significantly reduced to 10-48% if the macrophages were exposed to anti-inflammatory drugs. When ibuprofen and celecoxib were used the cell viability rebounded between 24 and 36 h. For prednisolone, dexamethasone, and methotrexate the cell viability dropped further between 24 and 36 h. Macrophages exposed to nanoparticles show secondary cytotoxicity, which has a significant antitumor effect in the microclimate of the coculture model. The beneficial nanoparticle treatment effect was significantly reduced if nonsteroidal anti-inflammatory drugs (NSAIDs), glucocorticoids, or methotrexate was given at the same time. The data suggest that anti-inflammatory treatments can decrease the carrier-induced macrophage cytotoxicity and its antitumor effectiveness with chemotherapy.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Sarfraz M,Roa W,Bou-Chacra N,Löbenberg R

doi

10.1021/acs.molpharmaceut.6b00530

subject

Has Abstract

pub_date

2016-09-06 00:00:00

pages

3270-8

issue

9

eissn

1543-8384

issn

1543-8392

journal_volume

13

pub_type

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