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Thermosensitive liposomes

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https://www.readbyqxmd.com/read/29126907/influence-of-cholesterol-inclusion-on-the-doxorubicin-release-characteristics-of-lysolipid-based-thermosensitive-liposomes
#1
Negar Sadeghi, Roel Deckers, Burcin Ozbakir, Sohail Akthar, Robbert Jan Kok, Twan Lammers, Gert Storm
Fast hyperthermia (i.e. 39-42 °C) triggered doxorubicin release from lysolipid-containing thermosensitive liposomes (LTSL) in the tumor vasculature has been demonstrated to result in considerable enhancement of bioavailable drug levels in heated tumor tissue in preclinical tumor models. However, there is also significant leakage of doxorubicin already at 37 °C in the bloodstream, making these LTSL less efficient and increasing the risk for systemic toxicity. In conventional liposomes, cholesterol is incorporated in the bilayer to increase the stability of the liposomes...
November 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29124936/in-vivo-ct-photoacoustic-imaging-and-nir-triggered-chemo-photothermal-combined-therapy-based-on-a-gold-nanostar-mesoporous-silica-and-thermo-sensitive-liposomes-composited-nanoprobe
#2
Jie An, Xiao-Quan Yang, Kai Cheng, Xian-Lin Song, Lin Zhang, Cheng Li, Xiao-Shuai Zhang, Yang Xuan, Yuan-Yang Song, Bi-Yun Fang, Xiao-Lin Hou, Yuan-Di Zhao, Bo Liu
Safe multifunctional nanoplatforms that have multiple therapeutic functions integrated with imaging capabilities are highly desired for biomedical applications. In this paper, targeted chemo-photothermal synergistic therapy and photoacoustic/CT imaging of tumor were achieved by one novel multifunctional nanoprobe (GMS/DOX@SLB-FA), it was composed of gold nanostar core and doxorubicin (DOX) loading mesoporous silica shell (GMS), which was coated with folic acid (FA) modified thermosensitively supported lipid bilayer (FA-SLB) as gatekeeper...
November 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29118984/clinical-trial-protocol-for-tardox-a-phase-i-study-to-investigate-the-feasibility-of-targeted-release-of-lyso-thermosensitive-liposomal-doxorubicin-thermodox%C3%A2-using-focused-ultrasound-in-patients-with-liver-tumours
#3
Paul C Lyon, Lucy F Griffiths, Jenni Lee, Daniel Chung, Robert Carlisle, Feng Wu, Mark R Middleton, Fergus V Gleeson, Constantin C Coussios
Background: TARDOX is a Phase I single center study of ultrasound triggered targeted drug delivery in adult oncology patients with incurable liver tumours. This proof of concept study is designed to demonstrate the safety and feasibility of targeted drug release and enhanced delivery of doxorubicin from thermally sensitive liposomes (ThermoDox®) triggered by mild hyperthermia induced by focused ultrasound in liver tumours. A key feature of the study is the direct quantification of the doxorubicin concentration before and after ultrasound exposure from tumour biopsies, using high performance liquid chromatography (HPLC)...
2017: Journal of Therapeutic Ultrasound
https://www.readbyqxmd.com/read/29109030/layer-by-layer-assembly-of-graphene-oxide-on-thermosensitive-liposomes-for-photo-chemotherapy
#4
Mohadeseh Hashemi, Meisam Omidi, Bharadwaj Muralidharan, Lobat Tayebi, Matthew J Herpin, Mohammad Ali Mohagheghi, Javad Mohammadi, Hugh D C Smyth, Thomas E Milner
Stimuli responsive polyelectrolyte nanoparticles have been developed for chemo-photothermal destruction of breast cancer cells. This novel system, called layer by layer Lipo-graph (LBL Lipo-graph), is composed of alternate layers of graphene oxide (GO) and graphene oxide conjugated poly (l-lysine) (GO-PLL) deposited on cationic liposomes encapsulating doxorubicin. Various concentrations of GO and GO-PLL were examined and the optimal LBL Lipo-graph was found to have a particle size of 267.9 ± 13 nm, zeta potential of +43...
November 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29032194/in-situ-mucoadhesive-thermosensitive-liposomal-gel-as-a-novel-vehicle-for-nasal-extended-delivery-of-opiorphin
#5
Paola Mura, Natascia Mennini, Cristina Nativi, Barbara Richichi
Previous studies proved the effectiveness of an intravenous PEGylated liposomal formulation of opiorphin (1 mg/mL) in protecting the drug from enzymatic degradation, and improving intensity and duration of its painkilling effect. Therefore, considering the advantages of nasal administration, the aim of this work was the development of a liposomal mucoadhesive thermo-sensitive in situ gel for the extended nasal delivery of opiorphin. With this purpose, the potential of a series of combinations of different polymers (i...
October 12, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29018051/phase-iii-heat-study-adding-lyso-thermosensitive-liposomal-doxorubicin-to-radiofrequency-ablation-in-patients-with-unresectable-hepatocellular-carcinoma-lesions
#6
Won Young Tak, Shi-Ming Lin, Yijun Wang, Jiasheng Zheng, Aldo Vecchione, Soo Young Park, Min Hua Chen, Stephen Wong, Ruocai Xu, Cheng-Yuan Peng, Yi-You Chiou, Guan-Tarn Huang, Jianqiang Cai, Basri Johan Abdullah, June Sung Lee, Jae Young Lee, Jong Young Choi, Julieta Gopez-Cervantes, Morris Sherman, Richard S Finn, Masao Omata, Michael O'Neal, Lukas Makris, Nicholas Borys, Ronnie Poon, Riccardo Lencioni
PURPOSE: Lyso-thermosensitive liposomal doxorubicin (LTLD) consists of doxorubicin contained within a heat-sensitive liposome. When heated to >=40ºC, LTLD locally releases a high concentration of doxorubicin. We aimed to determine whether adding LTLD improves the efficacy of radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC) lesions with a maximum diameter (dmax) of 3 to 7 cm. PATIENTS AND METHODS: The HEAT Study was a randomized, double-blind, dummy-controlled trial of RFA +/- LTLD...
October 10, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28937646/effects-of-liposomes-contained-in-thermosensitive-hydrogels-as-biomaterials-useful-in-neural-tissue-engineering
#7
Yusser Olguín, Cristian Campos, Javiera Catalán, Luís Velásquez, Fernando Osorio, Iván Montenegro, Alejandro Madrid, Cristian Acevedo
Advances in the generation of suitable thermosensitive hydrogels for the delivery of cells in neural tissue engineering demonstrate a delicate relationship between physical properties and capabilities to promote cell proliferation and differentiation. To improve the properties of these materials, it is possible to add liposomes for the controlled release of bioactive elements, which in turn can affect the physical and biological properties of the hydrogels. In the present investigation, different hydrogels based on Pluronic F127 have been formulated with the incorporation of chitosan and two types of liposomes of two different sizes...
September 22, 2017: Materials
https://www.readbyqxmd.com/read/28934281/smart-thermosensitive-liposomes-for-effective-solid-tumor-therapy-and-in-vivo-imaging
#8
Kevin Affram, Ofonime Udofot, Mandip Singh, Sunil Krishnan, Renee Reams, Jens Rosenberg, Edward Agyare
In numerous studies, liposomes have been used to deliver anticancer drugs such as doxorubicin to local heat-triggered tumor. Here, we investigate: (i) the ability of thermosensitive liposomal nanoparticle (TSLnp) as a delivery system to deliver poorly membrane-permeable anticancer drug, gemcitabine (Gem) to solid pancreatic tumor with the aid of local mild hyperthermia and, (ii) the possibility of using gadolinium (Magnevist®) loaded-TSLnps (Gd-TSLnps) to increase magnetic resonance imaging (MRI) contrast in solid tumor...
2017: PloS One
https://www.readbyqxmd.com/read/28920483/hydroxycamptothecin-liposomes-based-on-thermal-and-magnetic-dual-responsive-system-preparation-in-vitro-and-in-vivo-antitumor-activity-microdialysis-based-tumor-pharmacokinetics
#9
Hai-Mei Zhu, Jin-Hui Gu, Yi Xie, Bo Xie, Jia-Jun Ling
Due to the absence of lactone form of hydroxycamptothecin, the commercially available hydroxycamptothecin injection exhibits inefficient therapeutic effects. In this study, we constructed a novel delivery system (thermosensitive magnetic liposomes) that protects lactone form of hydroxycamptothecin from blood or water. After hydroxycamptothecin was loaded into the thermosensitive magnetic liposome(HCPT/TML),its in vitro and in vivo antitumor activity and microdialysis-based tumor pharmacokinetics were determined...
September 18, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28843864/sustained-release-of-intravitreal-flurbiprofen-from-a-novel-drug-in-liposome-in-hydrogel-formulation
#10
K Pachis, S Blazaki, M Tzatzarakis, P Klepetsanis, E Naoumidi, M Tsilimbaris, S G Antimisiaris
A novel Flurbiprofen (FLB)-in-liposome-in-hydrogel formulation was developed, as a method to sustain the release and increase the ocular bioavailability of FLB following intravitreal injection. For this, FLB loading into liposomes was optimized and liposomes were entrapped in thermosensitive hydrogels consisted of Pluronic F-127 (P). FLB solution, liposomes, and FLB dissolved in hydrogel were also used as control formulations. Actively loaded liposomes were found to be optimal for high FLB loading and small size, while in vitro studies revealed that P concentration of 18% (w/v) was best to retain the integrity of the hydrogel-dispersed liposome, compared to a 20% concentration...
August 25, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28819458/focused-ultrasound-hyperthermia-mediated-drug-delivery-using-thermosensitive-liposomes-and-visualized-with-in-vivo-two-photon-microscopy
#11
Marc A Santos, David E Goertz, Kullervo Hynynen
The future of nanomedicines in oncology requires leveraging more than just the passive drug accumulation in tumors through the enhanced permeability and retention effect. Promising results combining mild hyperthermia (HT) with lyso-thermosensitive liposomal doxorubicin (LTSL-DOX) has led to improved drug delivery and potent antitumor effects in pre-clinical studies. The ultimate patient benefit from these treatments can only be realized when robust methods of HT can be achieved clinically. One of the most promising methods of non-invasive HT is the use of focused ultrasound (FUS) with MRI thermometry for anatomical targeting and feedback...
2017: Theranostics
https://www.readbyqxmd.com/read/28801266/lipogels-responsive-to-near-infrared-light-for-the-triggered-release-of-therapeutic-agents
#12
Francisco Martín-Saavedra, Eduardo Ruiz-Hernández, Clara Escudero-Duch, Martín Prieto, Manuel Arruebo, Negar Sadeghi, Roel Deckers, Gert Storm, Wim E Hennink, Jesús Santamaría, Nuria Vilaboa
Here we report a composite system based on fibrin hydrogels that incorporate in their structure near-infrared (NIR) responsive nanomaterials and thermosensitive liposomes (TSL). Polymerized fibrin networks entrap simultaneously gold-based nanoparticles (NPs) capable of transducing NIR photon energy into heat, and lysolipid-incorporated TSL (LTSL) loaded with doxorubicin hydrochloride (DOX). NIR irradiation of the resulting hydrogels (referred to as "lipogels") with 808nm laser light increased the temperature of the illuminated areas, leading to the release of the liposomal cargo...
August 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28760449/tumor-microenvironment-determines-response-to-a-heat-activated-thermosensitive-liposome-formulation-of-cisplatin-in-cervical-carcinoma
#13
Yannan N Dou, Naz Chaudary, Martin C Chang, Michael Dunne, Huang Huang, David A Jaffray, Michael Milosevic, Christine Allen
Significant heterogeneity in the tumor microenvironment of human cervical cancer patients is known to challenge treatment outcomes in this population. The current standard of care for cervical cancer patients is radiation therapy and concurrent cisplatin (CDDP) chemotherapy. Yet this treatment strategy fails to control loco-regional disease in 10-30% of patients. In order to improve the loco-regional control rate, a thermosensitive liposome formulation of CDDP (HTLC) was developed to increase local concentrations of drug in response to mild hyperthermia (HT)...
July 29, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28758116/structure-and-function-of-trypsin-loaded-fibrinolytic-liposomes
#14
Anna Tanka-Salamon, Attila Bóta, András Wacha, Judith Mihály, Miklós Lovas, Krasimir Kolev
Protease encapsulation and its targeted release in thrombi may contribute to the reduction of haemorrhagic complications of thrombolysis. We aimed to prepare sterically stabilized trypsin-loaded liposomes (SSLT) and characterize their structure and fibrinolytic efficiency. Hydrogenated soybean phosphatidylcholine-based SSLT were prepared and their structure was studied by transmission electron microscopy combined with freeze fracture (FF-TEM), Fourier transform infrared spectroscopy (FT-IR), and small-angle X-ray scattering (SAXS)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28741634/mitochondria-targeting-near-infrared-light-triggered-thermosensitive-liposomes-for-localized-photothermal-and-photodynamic-ablation-of-tumors-combined-with-chemotherapy
#15
Caixia Yue, Yuming Yang, Jie Song, Gabriel Alfranca, Chunlei Zhang, Qian Zhang, Ting Yin, Fei Pan, Jesús M de la Fuente, Daxiang Cui
Lonidamine, an anticancer drug that acts on mitochondria, has poor water solubility. Mitochondria are the primary source of cellular reactive oxygen species (ROS), which are necessary for photodynamic therapy. Hence, a mitochondria-targeting drug delivery system loaded with Lonidamine and a ROS-produced photosensitizer could improve the bioavailability of Lonidamine and maximize photodynamic therapeutic efficiency. Here we report, for the first time, new IR-780 and Lonidamine encapsulated mitochondria-targeting thermosensitive liposomes (IL-TTSL)...
July 25, 2017: Nanoscale
https://www.readbyqxmd.com/read/28721817/improvement-of-thermosensitive-liposome-stability-by-cerasome-forming-lipid-with-si-o-si-network-structure
#16
Qin Su, Ximing Pu, He Bai, Xianchun Chen, Xiaoming Liao, Zhongbing Huang, Guangfu Yin
BACKGROUND: Liposomes have been widely used in the gene transfection and the drug delivery systems due to their excellent biocompatibility and encapsulation ability, especially, the ability to deliver the gene/drug into the cells via the membrane fusion. Thermosensitive liposoems have been proven to be a precise and effective method for cancer treatment in many preclinical studies. But the imperfect crystalline arrangement between grains occurred, resulting in planar defects at the boundaries of membranes, compromising the stability of thermosensitive liposomes...
July 19, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28696100/thermosensitive-liposomal-codelivery-of-hsa-paclitaxel-and-hsa-ellagic-acid-complexes-for-enhanced-drug-perfusion-and-efficacy-against-pancreatic-cancer
#17
Yan Wei, Yuxi Wang, Dengning Xia, Shiyan Guo, Feng Wang, Xinxin Zhang, Yong Gan
Fibrotic stroma and tumor-promoting pancreatic stellate cells (PSCs), critical characters in the pancreatic ductal adenocarcinoma (PDA) microenvironment, promote a tumor-facilitating environment that simultaneously prevents drug penetration into tumor foci and stimulates tumor growth. Nab-PTX, a human serum albumin (HSA) nanoparticle of paclitaxel (PTX), indicates enhanced matrix penetration in PDA probably due to its small size in vivo and high affinity of HSA with secreted protein acidic and rich in cysteine (SPARC), overexpressed in the PDA stroma...
July 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28654745/efficient-cancer-regression-by-a-thermosensitive-liposome-for-photoacoustic-imaging-guided-photothermal-chemo-combinatorial-therapy
#18
Yue Cao, Jingwen Yi, Xiaoguang Yang, Lei Liu, Chunlei Yu, Yanxin Huang, Luguo Sun, Yongli Bao, Yuxin Li
The capacity to specifically destroy cancer cells while avoiding normal tissue is urgently desirable in cancer treatment. Herein, a photothermal-trigger-released system serves as a photoacoustic imaging agent constructed by entrapping diketopyrrolopyrrole-based conjugated polymers and curcumin in a poly(ethylene glycol) (PEG)-protected thermoresponsive liposomal phospholipid bilayer. This lipid nanostructure can improve the bioavailability of hydrophobic agents for photothermal treatment with high efficiency and deliver the anticancer drug curcumin to the tumor site actuated by near-infrared (NIR) irradiation...
July 13, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28652729/nir-responsive-liposomal-system-for-rapid-release-of-drugs-in-cancer-therapy
#19
Ming-Mao Chen, Yuan-Yuan Liu, Guang-Hao Su, Fei-Fei Song, Yan Liu, Qi-Qing Zhang
To design a rapid release liposomal system for cancer therapy, a NIR responsive bubble-generating thermosensitive liposome (BTSL) system combined with photothermal agent (Cypate), doxorubicin (DOX), and NH4HCO3 was developed. Cypate/DOX-BTSL exhibited a good aqueous stability, photostability, and photothermal effect. In vitro release suggested that the amounts of DOX released from BTSL were obviously higher than that of (NH4)2SO4 liposomes at 42°C. After NIR irradiation, the hyperthermic temperature induced by Cypate led to the decomposition of NH4HCO3 and the generation of a large number of CO2 bubbles, triggering a rapid release of drugs...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28648864/impact-of-plasma-protein-binding-on-cargo-release-by-thermosensitive-liposomes-probed-by-fluorescence-correlation-spectroscopy
#20
Judith J Mittag, Barbara Kneidl, Tobias Preiβ, Martin Hossann, Gerhard Winter, Stefan Wuttke, Hanna Engelke, Joachim O Rädler
Thermosensitive liposomes (TSLs) whose phase-transition temperature (Tm) lies slightly above body temperature are ideal candidates for controlled drug release via local hyperthermia. Recent studies, however, have revealed disruptive shifts in the release temperature Tr in mouse plasma, which are attributed to undefined interactions with blood proteins. Here, we study the effects of four major plasma proteins - serum albumin (SA), transferrin (Tf), apolipoprotein A1 (ApoA1) and fibrinogen (Fib) - on the temperature-dependent release of fluorescein di-β-D-galactopyranoside (FDG) from TSLs...
October 2017: European Journal of Pharmaceutics and Biopharmaceutics
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