Chemotherapy sensitization of glioblastoma by focused ultrasound-mediated delivery of therapeutic liposomes

In glioblastoma, the benefit from temozolomide chemotherapy is largely limited to a subgroup of patients (30–35%) with tumors exhibiting methylation of the promoter region of the O6-methylguanine-DNA methyltransferase (MGMT) gene. In order to allow more patients to benefit from this treatment, we ex...

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Veröffentlicht in:Journal of controlled release 2019-02, Vol.295, p.130-139
Hauptverfasser: Papachristodoulou, Alexandros, Signorell, Rea Deborah, Werner, Beat, Brambilla, Davide, Luciani, Paola, Cavusoglu, Mustafa, Grandjean, Joanes, Silginer, Manuela, Rudin, Markus, Martin, Ernst, Weller, Michael, Roth, Patrick, Leroux, Jean-Christophe
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container_end_page 139
container_issue
container_start_page 130
container_title Journal of controlled release
container_volume 295
creator Papachristodoulou, Alexandros
Signorell, Rea Deborah
Werner, Beat
Brambilla, Davide
Luciani, Paola
Cavusoglu, Mustafa
Grandjean, Joanes
Silginer, Manuela
Rudin, Markus
Martin, Ernst
Weller, Michael
Roth, Patrick
Leroux, Jean-Christophe
description In glioblastoma, the benefit from temozolomide chemotherapy is largely limited to a subgroup of patients (30–35%) with tumors exhibiting methylation of the promoter region of the O6-methylguanine-DNA methyltransferase (MGMT) gene. In order to allow more patients to benefit from this treatment, we explored magnetic resonance image-guided microbubble-enhanced low-intensity pulsed focused ultrasound (LIFU) to transiently open the blood-brain barrier and deliver a first-in-class liposome-loaded small molecule MGMT inactivator in mice bearing temozolomide-resistant gliomas. We demonstrate that a liposomal O6-(4-bromothenyl)guanine (O6BTG) derivative can efficiently target MGMT, thereby sensitizing murine and human glioma cells to temozolomide in vitro. Furthermore, we report that image-guided LIFU mediates the delivery of the stable liposomal MGMT inactivator in the tumor region resulting in potent MGMT depletion in vivo. Treatment with this new liposomal MGMT inactivator facilitated by LIFU-mediated blood-brain barrier opening reduced tumor growth and significantly prolonged survival of glioma-bearing mice, when combined with temozolomide chemotherapy. Exploring this novel combined approach in the clinic to treat glioblastoma patients with MGMT promoter-unmethylated tumors is warranted. [Display omitted] •A novel therapeutic liposomal agent inactivates MGMT in glioblastoma•MRI-guided LIFU opens the BBB to deploy nanotherapeutics in targeted regions•LIFU-driven delivery of liposomal MGMT inactivators reverses glioma chemoresistance
doi_str_mv 10.1016/j.jconrel.2018.12.009
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Exploring this novel combined approach in the clinic to treat glioblastoma patients with MGMT promoter-unmethylated tumors is warranted. 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Exploring this novel combined approach in the clinic to treat glioblastoma patients with MGMT promoter-unmethylated tumors is warranted. 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subjects Animals
Antineoplastic Agents, Alkylating - administration & dosage
Antineoplastic Agents, Alkylating - therapeutic use
Brain Neoplasms - diagnostic imaging
Brain Neoplasms - drug therapy
Brain Neoplasms - metabolism
Cell Line, Tumor
Dacarbazine - administration & dosage
Dacarbazine - therapeutic use
Drug Delivery Systems - methods
Enzyme Inhibitors - administration & dosage
Enzyme Inhibitors - therapeutic use
Focused ultrasound
Glioblastoma
Glioblastoma - diagnostic imaging
Glioblastoma - drug therapy
Glioblastoma - metabolism
Guanine - administration & dosage
Guanine - analogs & derivatives
Guanine - therapeutic use
Image-guided targeting
Liposomes
Liposomes - administration & dosage
Liposomes - therapeutic use
Magnetic Resonance Imaging - methods
Methylguanine-DNA methyltransferase inactivation
Mice
O-Methylguanine-DNA Methyltransferase - antagonists & inhibitors
O-Methylguanine-DNA Methyltransferase - metabolism
Temozolomide resistance
Ultrasonic Waves
title Chemotherapy sensitization of glioblastoma by focused ultrasound-mediated delivery of therapeutic liposomes
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