Abstract |
The development of immunoliposomes for systemic siRNA ( small interfering RNA) delivery is highly desired. We reported previously the development of targeted LPD ( liposome-polycation- DNA complex) conjugated with anti-EGFR ( epidermal growth factor receptor) Fab' (TLPD-FCC) for siRNA delivery, which showed superior gene silencing activity in EGFR-overexpressing breast cancers. However, TLPD-FCC did not achieve satisfactory gene silencing activity in EGFR-overexpressing hepatocellular carcinoma (HCC). In this study, some modifications including increased antibody conjugation efficiency and reduced PEGylation degree were made to TLPD-FCC to increase gene silencing activity in HCC. The resultant optimized liposomes denoted as TLPD-FP75 efficiently bound and delivered to EGFR-overexpressing HCC, resulting in enhanced gene silencing activity compared to untargeted LPD (NTLPD-FP75). Tissue distribution in vivo revealed that the accumulation of TLPD-FP75 was higher than NTLPD-FP75 in orthotopic HCC model of mice. The promoted uptake of TLPD-FP75 in HCC cells was confirmed by confocal microscopy. To investigate the in vivo gene silencing activity, we administered TLPD-FP75 by intravenous injections into mice bearing orthotopic HCC. The results showed TLPD-FP75 potently suppressed luciferase expression, while little silencing was observed in NTLPD-FP75. TLPD-FP75 was demonstrated to possess potent gene silencing activity in HCC and will potentially increase the feasibility of HCC gene therapy.
|
Authors | Jie Gao, Yongsheng Yu, Yingying Zhang, Jinjing Song, Huaiwen Chen, Wei Li, Weizhu Qian, Li Deng, Geng Kou, Jianming Chen, Yajun Guo |
Journal | Biomaterials
(Biomaterials)
Vol. 33
Issue 1
Pg. 270-82
(Jan 2012)
ISSN: 1878-5905 [Electronic] Netherlands |
PMID | 21963149
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
|
Copyright | Copyright © 2011 Elsevier Ltd. All rights reserved. |
Chemical References |
- Liposomes
- RNA, Small Interfering
- Polyethylene Glycols
- ErbB Receptors
|
Topics |
- Animals
- Carcinoma, Hepatocellular
(genetics, therapy)
- Cell Line, Tumor
- ErbB Receptors
- Gene Silencing
- Humans
- Liposomes
(administration & dosage, chemistry)
- Liver Neoplasms
(genetics, therapy)
- Male
- Mice
- Polyethylene Glycols
(chemistry)
- RNA, Small Interfering
(administration & dosage, genetics, physiology)
|