title: Nanohybrid liposomal cerasomes with good physiological stability and rapid temperature responsiveness for high intensity focused ultrasound triggered local chemotherapy of cancer.
abstract: The high intensity focused ultrasound (HIFU) and thermosensitive cerasomes (HTSCs) were successfully assembled by employing cerasome-forming lipid (CFL) in combination with the component lipids of conventional low temperature sensitive liposomes (LTSLs) including 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000] (DSPE-PEG-2000) and 1-stearoyl-2-hydroxy-sn-glycero-3-phosphocholine (MSPC). The HTSCs showed spherical shape with a mean diameter around 200 nm, exhibiting good biocompatibility. Both hydrophilic and lipophilic drugs can be efficiently encapsulated into HTSCs. In addition, the release rate of HTSCs could be conveniently adjusted by varying the molar ratios of CFL to DPPC. The drug loaded HTSCs showed much longer blood circulation time (half-life >8.50 ± 1.49 h) than conventional LTSLs (0.92 ± 0.17 h). An in vitro study demonstrated that the drug loaded HTSCs are highly stable at 37 °C and show a burst release at 42 °C, providing a capability to act synergistically against tumors. We found that the HTSCs with a proportion of 43.25% of CFL could release more than 90% hydrophilic drugs in 1 min at an elevated temperature of 42 °C generated by HIFU exposure. After intravenous injection of doxorubicin (DOX) loaded HTSCs at 5 mg DOX/kg, followed by double HIFU sonication, the tumor growth of the adenocarcinoma (MDA-MB-231) bearing mice could be significantly inhibited. Therefore, the drug loaded HTSCs combined with HIFU hold great potential for efficient local chemotherapy of cancer due to the ability to deliver high concentration of chemotherapy drugs directly to the tumor, achieve maximum therapeutic efficacy and minimal side effects, and avoid the damage to the healthy tissues caused by systemic administration of drugs.
authors.affiliation: Department of Biomedical Engineering, College of Engineering, Peking University , Beijing 100871, China.
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Liang
authors.forename: Jing
authors.initials: J
authors.lastname: Gao
authors.forename: Lingdong
authors.initials: L
authors.lastname: Jiang
authors.forename: Jianwen
authors.initials: J
authors.lastname: Luo
authors.forename: Lijia
authors.initials: L
authors.lastname: Jing
authors.forename: Xiaoda
authors.initials: X
authors.lastname: Li
authors.forename: Yushen
authors.initials: Y
authors.lastname: Jin
authors.forename: Zhifei
authors.initials: Z
authors.lastname: Dai
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000737:chemistry* / Q000493:pharmacokinetics / Q000494:pharmacology; D001672:Biocompatible Materials / Q000737:chemistry* / Q000633:toxicity; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004317:Doxorubicin / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics / Q000494:pharmacology; D065546:Drug Liberation; D004355:Drug Stability; D005260:Female; D020404:Glycerophospholipids / Q000737:chemistry; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D008051:Lipid Bilayers / Q000737:chemistry; D008081:Liposomes; D051379:Mice; D008958:Models, Molecular; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000633:toxicity; D009369:Neoplasms / Q000188:drug therapy* / Q000473:pathology; D051381:Rats; D013696:Temperature; D000069453:Ultrasonic Waves
chemical_list: D000970:Antineoplastic Agents; D001672:Biocompatible Materials; D020404:Glycerophospholipids; D008051:Lipid Bilayers; D008081:Liposomes; D004317:Doxorubicin
keywords: cerasomes; high intensity focused ultrasound; local chemotherapy; thermosensitive liposome; triggered drug release