Abstract:
:The major aim of the present study was to develop an integrin receptor-targeted liposomal paclitaxel (PTX) to enhance the targeting specificity and therapeutic effect of PTX on hepatocellular carcinoma (HCC) cells. The specific Arg-Gly-Asp (RGD) ligand was conjugated to 1,2-distearoylphosphatidylethanolamine-polyethylene glycol 2000 to prepare the RGD-modified liposomes (RGD-LP). Furthermore, physicochemical characteristics of RGD-LP, including particle size, ζ potential, encapsulation efficiency and in vitro PTX release, were evaluated. RGD-modified liposomes were selected as the carrier for the present study, as they exhibit good biocompatibility and are easy to modify using RGD. The cellular uptake efficacy of RGD-LP by HepG2 cells was 3.3-fold higher than that of liposomes without RGD, indicating that RGD-LP may specifically target HepG2 cells by overexpressing integrin αvβ3 receptors. The RGD modification appeared to enhance the anti-proliferative activity of LP-PTX against HepG2 cells, with the extent of anti-proliferative activity dependent on the concentration of PTX and the incubation time. Additionally, evaluation of the homing specificity and anticancer efficacy of RGD-LP on the tumor spheroids indicated that solid tumor penetration was enhanced by the modification of RGD. In agreement with these in vitro findings, in vivo investigations demonstrated that RGD-LP-PTX exhibited a greater inhibitory effect on tumor growth in HepG2-bearing mice than LP-PTX or free PTX. Thus, RGD-LPs may represent an efficient targeted PTX delivery system for the treatment of patients with HCC.
journal_name
Oncol Lettjournal_title
Oncology lettersauthors
Chen L,Liu Y,Wang W,Liu Kdoi
10.3892/ol.2015.3242subject
Has Abstractpub_date
2015-07-01 00:00:00pages
77-84issue
1eissn
1792-1074issn
1792-1082pii
OL-0-0-3242journal_volume
10pub_type
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