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Local hyperthermia for esophageal cancer in a rabbit tumor model: Magnetic stent hyperthermia versus magnetic fluid hyperthermia

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单位: [1]Cent S Univ, Dept Oncol, Xiangya Hosp, Changsha 410008, Hunan, Peoples R China [2]Tsinghua Univ, Dept Engn Phys, Inst Med Phys & Engn, Key Lab Particle & Radiat Imaging,Minist Educ, Beijing 100084, Peoples R China [3]Peoples Hosp Zhangqiu, Dept Pathol, Zhangqiu 250200, Shandong, Peoples R China [4]China Japan Friendship Hosp, Dept Med Oncol, Beijing 100029, Peoples R China [5]Jiamusi Univ, Dept Stomatol, Hosp Affiliated 2, Jiamusi 154002, Heilongjiang, Peoples R China
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关键词: magnetic mediated hyperthermia esophageal cancer magnetic nanoparticles esophageal stent alternative magnetic field

摘要:
Magnetic-mediated hyperthermia (MMH) is a promising local thermotherapy approach for cancer treatment. The present study investigated the feasibility and effectiveness of MMH in esophageal cancer using a rabbit tumor model. The therapeutic effect of two hyperthermia approaches, magnetic stent hyperthermia (MSH), in which heat is induced by the clinical stent that is placed inside the esophagus, and magnetic fluid hyperthermia (MFH), where magnetic nanoparticles are applied as the agent, was systematically evaluated. A rabbit esophageal tumor model was established by injecting VX2 carcinoma cells into the esophageal submucosa. The esophageal stent was deployed perorally into the tumor segment of the esophagus. For the MFH, magnetic nanoparticles (MNPs) were administered to the rabbits by intratumoral injection. The rabbits were exposed under a benchtop applicator using an alternative magnetic field (AMF) with 300 kHz frequency for the hyperthermia treatment. The results demonstrated that esophageal stents and MNPs had ideal inductive heating properties upon exposure under an AMF of 300 kHz. MSH, using a thermal dose of 46 degrees C with a 10-min treatment time, demonstrated antitumor effects on the rabbit esophageal cancer. However, the rabbit esophageal wall is not heat-resistant. Therefore, a higher temperature or longer treatment time may lead to necrosis of the rabbit esophagus. MFH has a significant antitumor effect by confining the heat within the tumor site without damaging the adjacent normal tissues. The present study indicates that the two hyperthermia procedures have therapeutic effects on esophageal cancer, and that MFH may be more specific than MSH in terms of temperature control during the treatment.

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出版当年[2012]版:
大类 | 4 区 医学
小类 | 4 区 肿瘤学
最新[2025]版:
大类 | 4 区 医学
小类 | 4 区 肿瘤学
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出版当年[2011]版:
Q4 ONCOLOGY
最新[2023]版:
Q3 ONCOLOGY

影响因子: 最新[2023版] 最新五年平均[2021-2025] 出版当年[2011版] 出版当年五年平均[2007-2011] 出版前一年[2010版] 出版后一年[2012版]

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第一作者单位: [1]Cent S Univ, Dept Oncol, Xiangya Hosp, Changsha 410008, Hunan, Peoples R China [2]Tsinghua Univ, Dept Engn Phys, Inst Med Phys & Engn, Key Lab Particle & Radiat Imaging,Minist Educ, Beijing 100084, Peoples R China
通讯作者:
通讯机构: [1]Cent S Univ, Dept Oncol, Xiangya Hosp, Changsha 410008, Hunan, Peoples R China [2]Tsinghua Univ, Dept Engn Phys, Inst Med Phys & Engn, Key Lab Particle & Radiat Imaging,Minist Educ, Beijing 100084, Peoples R China
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