Hyperthermia-induced antitumor activity of thermosensitive polymer modified temperature-sensitive liposomes.
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| Abstract |
Temperature-sensitive liposomes (TS-liposomes) have been studied for chemotherapeutic purposes to enhance the release of anticancer drugs at tumor sites. In this study, we prepared poly(N-isopropylacrylamide-co-acrylamide) (PNIPAM-AAM) and polyethylene glycol (PEG)-modified TS-liposomes (PETS-liposomes). PETS-liposomes significantly increased in vitro drug release in serum compared with PEG-fixed or PNIPAM-AAM-modified liposomes. Furthermore, incorporation of both PNIPAM-AAM and PEG into PETS-liposomes enhanced the stabilities of liposomes in serum by inhibiting protein adsorption. In addition, to investigate the therapeutic efficacy of doxorubicin (DOX)-loaded PETS-liposomes, the in vivo antitumor activity of liposomes in combination with hyperthermia was evaluated in a B16F10 melanoma tumor-bearing mouse model. PETS-liposomes showed much higher levels of tumor growth inhibition than PEG-fixed or PNIPAM-AAM-modified TS-liposomes. Moreover, the antitumor activity of PETS-liposomes was enhanced significantly when they were administered in combination with hyperthermia. PETS-liposomes were found to be highly efficacious carriers for the in vivo delivery of anticancer drugs, and to have potential anticancer applications in combination with hyperthermia.
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| Authors | Hee Dong Han, Min Soo Choi, Taewon Hwang, Chung Kil Song, Hasoo Seong, Tae Woo Kim, Ho Suk Choi, Byung Cheol Shin |
| Journal | Journal of pharmaceutical sciences (J Pharm Sci) Vol. 95 Issue 9 Pg. 1909-17 (Sep 2006) ISSN: 0022-3549 [Print] United States |
| PMID | 16795016 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't) |
| Copyright | (c) 2006 Wiley-Liss, Inc. and the American Pharmacists Association. |
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