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hyperthermia treatment

Maneea Eizadi Sharifabad, Tim Mercer, Tapas Sen
Liposome-capped core-shell mesoporous silica-coated superparamagnetic iron oxide nanoparticles called 'magnetic protocells' were prepared as novel nanocomposites and used for loading anticancer drug doxorubicin (DOX) for cellular toxicity study. Cytotoxicity of the magnetic protocells with or without DOX was tested in vitro on commercial MCF7 and U87 cell lines under alternating magnetic field. MCF7 cell line treated with the DOX-loaded nanoparticles under alternating magnetic field exhibited nearly 20% lower survival rate after 24 h compared with cells treated with free DOX and similarly, it was around 24% when applied to U87...
October 19, 2016: Nanomedicine
Cristina Munoz-Menendez, Ivan Conde-Leboran, David Serantes, Roy Chantrell, Oksana Chubykalo-Fesenko, Daniel Baldomir
In the magnetic fluid hyperthermia (MFH) research field, it is usually assumed that achieving a uniform temperature enhancement (ΔT) of the entire tumour is a key-point for treatment. However, various experimental works reported successful cell apoptosis via MFH without a noticeable ΔT of the system. A possible explanation of the success of these negligible-ΔT experiments is that a local ΔT restricted to the particle nanoenvironment (i.e. with no significant effect on the global temperature T) could be enough to trigger cell death...
October 18, 2016: Soft Matter
Wafaa Abdou Mohamed Mohamed, Tamer Ismail, Sameh Farouk
OBJECTIVES: Hyperthermia is one of the most common environmental stressors that affect multi-biological systems in the body including the central nervous system as well as the hematopoietic organs. The objective of the present study was to investigate the protective role of ethanolic extract of propolis (EEP) on some selective stress markers, hematological, biochemical, and histopathological changes in rats subjected to hyperthermia (40 °C/12 hr). MATERIALS AND METHODS: The experimental groups (10 rats each) were classified as follows; Group A; control, (C), was kept at a controlled room temperature (25±5 °C)...
August 2016: Iranian Journal of Basic Medical Sciences
Azadeh Kheirolomoom, Elizabeth S Ingham, Joel Commisso, Neveen Abushaban, Katherine W Ferrara
We previously developed a pH-responsive copper-doxorubicin (CuDox) cargo in lysolipid-based temperature-sensitive liposomes (LTSLs). The CuDox complex is released from the particle by elevated temperature; however, full release of doxorubicin from CuDox requires a reduced pH, such as that expected in lysosomes. The primary goal of this study is to evaluate the cellular uptake and intracellular trafficking of the drug-metal complex in comparison with intact liposomes and free drug. We found that the CuDox complex was efficiently internalized by mammary carcinoma cells after release from LTSLs...
October 13, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
C M van Leeuwen, J Crezee, A L Oei, N A P Franken, L J A Stalpers, A Bel, H P Kok
PURPOSE: Currently, clinical decisions regarding thermoradiotherapy treatments are based on clinical experience. Quantification of the radiosensitising effect of hyperthermia allows comparison of different treatment strategies, and can support clinical decision-making regarding the optimal treatment. The software presented here enables biological evaluation of thermoradiotherapy plans through calculation of equivalent 3D dose distributions. METHODS: Our in-house developed software (X-Term) uses an extended version of the linear-quadratic model to calculate equivalent radiation dose, i...
October 17, 2016: International Journal of Hyperthermia
Farah Benyettou, Jaen Alonso Ocadiz Flores, Florent Ravaux, Rachid Rezgui, Mustapha Jouiad, Samer I Nehme, Rajesh Kumar Parsapur, John-Carl Olsen, Parasuraman Selvam, Ali Trabolsi
Mesoporous iron-oxide nanoparticles (mNPs) were prepared by using a modified nanocasting approach with mesoporous carbon as a hard template. mNPs were first loaded with doxorubicin (Dox), an anticancer drug, and then coated with the thermosensitive polymer Pluronic F108 to prevent the leakage of Dox molecules from the pores that would otherwise occur under physiological conditions. The Dox-loaded, Pluronic F108-coated system (Dox@F108-mNPs) was stable at room temperature and physiological pH and released its Dox cargo slowly under acidic conditions or in a sudden burst with magnetic heating...
October 14, 2016: Chemistry: a European Journal
Gokce Dundar, Gokhan Gokce, Kaan Gokcen, Esat Korgali, Aydemir Asdemir, Kenan Kaygusuz
PURPOSE: Pediatric stone disease is an important clinical problem in pediatric urology practice. We aimed to compare mini-percutaneous nephrolithotomy (miniperc) and micro-percutaneous nephrolithotomy (microperc) in pediatric patients who underwent unsuccesful SWL procedure. MATERIALS AND METHODS: A number of 43 pediatric patients, aged 17 years or younger, were treated with miniperc or microperc procedures due to renal calculi by a single surgeon. In group 1, there were 27 patients who underwent miniperc procedure...
October 10, 2016: Urology Journal
Fiona Brigid McDonald, Kumaran Chandrasekharan, Richard J A Wilson, Shabih U Hasan
Maternal cigarette smoke (CS) exposure exhibits a strong epidemiological association with Sudden Infant Death Syndrome but other environmental stressors, including infection, hyperthermia and hypoxia have also been postulated as important risk factors. This study examines if maternal CS exposure causes maladaptations within homeostatic control networks by influencing the response to lipopolysaccharide, heat stress and/or hypoxia in neonatal rats. Pregnant dams were exposed to CS or parallel sham treatments daily for the length of gestation...
October 12, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
C Raspé, L Flöther, R Schneider, M Bucher, P Piso
Due to the significantly improved outcome and quality of life of patients with different tumor entities after cytoreductive surgery (CRS) and HIPEC, there is an increasing number of centers performing CRS and HIPEC procedures. As this procedure is technically challenging with potential high morbidity and mortality, respectively, institutional experience also in the anesthetic and intensive care departments is essential for optimal treatment and prevention of adverse events. Clinical pathways have to be developed to achieve also good results in more comorbid patients with border line indications and extensive surgical procedures...
September 28, 2016: European Journal of Surgical Oncology
Yaoping Shi, Jianfeng Wang, Zhibin Bai, Yonggang Li, Longhua Qiu, Bo Zhai, Feng Zhang, Xiaoming Yang
Despite recent advances in surgical technique and treatment strategies for esophageal cancer (EC), to effectively manage the advanced (metastatic or disseminated) and recurrent EC still remain a great challenge. The aim of this study was to determine the feasibility of using intra-esophagus radiofrequency hyperthermia to enhance local HSV-TK/ganciclovir-mediated suicide gene therapy of an innovative animal models with orthotopic esophageal squamous cancers. Human esophageal squamous cancer (ESCa) cells were labeled with lentivirus/luciferase...
2016: American Journal of Cancer Research
Patrícia Santos, Ana P Herrmann, Radharani Benvenutti, Guilherme Noetzold, Franciele Giongo, Clarissa S Gama, Angelo L Piato, Elaine Elisabetsky
Anxiety disorders are highly prevalent and often result in poor quality of life. Available anxiolytics show significant adverse effects as well as partial efficacy in a sizable part of patients. Innovative treatments with more favorable risk-benefit ratio are sorely needed. A growing body of clinical data indicates the benefits of N-acetylcysteine (NAC) in psychiatric conditions. NAC modulates antioxidant, glutamatergic, inflammatory and neurotrophic pathways in the central nervous system, all of which are relevant to anxiety pathology...
October 7, 2016: Behavioural Brain Research
Miriam Jaafar, Óscar Iglesias-Freire, Pedro García-Mochales, Juan José Sáenz, Agustina Asenjo
Measuring energy dissipation on the nanoscale is of great interest not only for nanomechanics but also to understand important energy transformation and loss mechanisms that determine the efficiency of energy of data storage devices. Fully understanding the magnetic dynamics and dissipation processes in nanomagnets is of major relevance for a number of basic and applied issues from magnetic recording to spin-based sensor devices to biomedical magnetic-based hyperthermia treatments. Here we present experimental evidence for a counter-intuitive monotonical reduction of energy dissipation as the interaction between two nanomagnets is enhanced...
September 29, 2016: Nanoscale
Sheetal Parida, Chiranjit Maiti, Y Rajesh, Kaushik K Dey, Ipsita Pal, Aditya Parekh, Rusha Patra, Dibakar Dhara, Pranab Kumar Dutta, Mahitosh Mandal
BACKGROUND: Gold nanorods, by virtue of surface plasmon resonance, convert incident light energy (NIR) into heat energy which induces hyperthermia. We designed unique, multifunctional, gold nanorod embedded block copolymer micelle loaded with GW627368X for targeted drug delivery and photothermal therapy. METHODS: Glutathione responsive diblock co-polymer was synthesized by RAFT process forming self-assembled micelle on gold nanorods prepared by seed mediated method and GW627368X was loaded on to the reduction responsive gold nanorod embedded micelle...
October 6, 2016: Biochimica et Biophysica Acta
Chunfang Zhang, Yuan Yong, Li Song, Xinghua Dong, Xiao Zhang, Xiangfeng Liu, Zhanjun Gu, Yuliang Zhao, Zhongbo Hu
The combination of photothermal therapy (PTT) with gene therapy (GT) to improve PTT efficiency and thus eliminate cancer cells under mild hyperthermia is highly needed. Herein, multifunctional WS2 @polyetherimide (WS2 @PEI) nanoplatform has been designed and constructed for gene-photothermal synergistic therapy of tumors at mild condition. After a surface modification of WS2 with a positively charged PEI, the as-prepared WS2 @PEI nanoplatform can not only act as an efficient survivin-siRNA carrier for GT but also exhibit remarkable near-infrared (NIR) photothermal effects for PTT...
September 26, 2016: Advanced Healthcare Materials
J Irani
: Non-muscle-invasive bladder cancer (NMIBC) is characterised by a high risk of recurrence when performing only a transurethral resection of the bladder (TURB). Intravesical instillations are performed postoperatively to decrease the rate of recurrence. The standard agents currently used are Mitomycin-C (MMC) or bacillus Calmette-Guérin (BCG). In order to further enhance the efficacy of the adjuvant treatments and/or diminish their side effects, alternative treatments are studied. Intravesical MMC combined with hyperthermia could be an interesting alternative active treatment for intermediate- and possibly high-risk NMIBC, and has been investigated in the past years...
October 3, 2016: Progrès en Urologie
Jennifer L Krill, Ken Dawson-Scully
While the mammalian brain functions within a very narrow range of oxygen concentrations and temperatures, the fruit fly, Drosophila melanogaster, has employed strategies to deal with a much wider range of acute environmental stressors. The foraging (for) gene encodes the cGMP-dependent protein kinase (PKG), has been shown to regulate thermotolerance in many stress-adapted species, including Drosophila, and could be a potential therapeutic target in the treatment of hyperthermia in mammals. Whereas previous thermotolerance studies have looked at the effects of PKG variation on Drosophila behavior or excitatory postsynaptic potentials at the neuromuscular junction (NMJ), little is known about PKG effects on presynaptic mechanisms...
2016: PloS One
Mahdi Nabil, Paolo Zunino
The application of hyperthermia to cancer treatment is studied using a novel model arising from the fundamental principles of flow, mass and heat transport in biological tissues. The model is defined at the scale of the tumour microenvironment and an advanced computational scheme called the embedded multiscale method is adopted to solve the governing equations. More precisely, this approach involves modelling capillaries as one-dimensional channels carrying flow, and special mathematical operators are used to model their interaction with the surrounding tissue...
September 2016: Royal Society Open Science
Samira Eynali, Samideh Khoei, Sepideh Khoei, Elaheh Esmaelbeygi
The purpose of this study was to evaluate the combined effects of heat and poly lactic-co-glycolic acid (PLGA) nanoparticles, as 5-fluorouracil carriers with/without iron oxide core, on the viability and proliferation capacity of human colon cancer cell line HT-29 in the spheroid model. HT-29 spheroid cells were treated with different concentrations of 5-FU or 5-FU loaded into both nanoparticles for 74 h. Hyperthermia was then performed at 43°C for 60 min. Finally, the effects of the mentioned treatments on cell viability and proliferation capacity were evaluated using the trypan blue dye exclusion test and colony formation assay, respectively...
October 4, 2016: International Journal of Hyperthermia
Jie Yu, Ping Liang
Tumor ablation is defined as the direct application of chemical or thermal therapy to eradicate or substantially destroy a tumor. Currently, minimally invasive ablation techniques are available for the local destruction of focal tumors in multiple organ sites. Microwave ablation is premised on the biological response of solid tumors to tissue hyperthermia, and it is a relatively low-risk procedure. Due to several advantages of microwave ablation, including higher thermal efficiency, higher capability for coagulating blood vessels, faster ablation time, and the simultaneous application of multiple antennae, microwave ablation could be a promising minimally invasive ablation technique for the treatment of solid tumors...
October 4, 2016: International Journal of Hyperthermia
A Fornes-Leal, C Garcia-Pardo, M Frasson, V Pons Beltrán, N Cardona
Several reports over the last few decades have shown that the dielectric properties of healthy and malignant tissues of the same body organ usually show different values. However, no intensive dielectric studies of human colon tissue have been performed, despite colon cancer's being one of the most common types of cancer in the world. In order to provide information regarding this matter, a dielectric characterization of healthy and malignant colon tissues is presented. Measurements are performed on ex vivo surgery samples obtained from 20 patients, using an open-ended coaxial probe in the 0...
October 3, 2016: Physics in Medicine and Biology
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