• Title/Summary/Keyword: Hyperthermia

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Controlling the Heat Generation Capability of Iron Oxide-Base Nanoparticles (산화철 나노 입자의 발열 효과의 제어)

  • Choi, Jin-sil
    • Journal of Powder Materials
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    • v.28 no.6
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    • pp.518-526
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    • 2021
  • This review summarizes the recent progress in iron-oxide-based heat generators. Cancer treatment using magnetic nanoparticles as a heat generator, termed magnetic fluid hyperthermia, is a promising noninvasive approach that has gained significant interest. Most previous studies on improving the hyperthermia effect have focused on the construction of dopant-containing iron oxides. However, their applications in a clinical application can be limited due to extra dopants, and pure iron oxide is the only inorganic material approved by the Food and Drug Administration (FDA). Several factors that influence the heat generation capability of iron-oxide-based nanoparticles are summarized by reviewing recent studies on hyperthermia agents. Thus, our paper will provide the guideline for developing pure iron oxide-based heat generators with high heat dissipation capabilities.

The Development of Ultrasonic Hyperthermia Simulator to Improve the Efficiency of Ultrasonic Therapy (초음파 치료의 효율성 향상을 위한 초음파 온열 시뮬레이터 개발)

  • Yu, W.J.;Noh, S.C.;Jung, D.W.;Park, J.H.;Choi, M.J.;Choi, H.H.
    • Journal of Biomedical Engineering Research
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    • v.30 no.5
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    • pp.418-427
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    • 2009
  • As many people are westernizing their life style and food consumption habits, a number of patients who have malignant tumors which grow very rapidly and hazardously destroy the human body are increasing. Ultrasonic hyperthermia is not only one of the tumor treatment methods which employs the non-radioactive ultrasonic waves to increase the temperature at the tumor region up to $40\sim45^{\circ}C$ to destroy and suppress tumor cells but also has been proved by many studies. Due to the rapid development of High Intensity Focused Ultrasound(HIFU), the ultrasound hyperthemia extensively boosts its applications in clinical field. For those reasons, Computed simulation factor should be needed before inspection to patients. To prove efficiency of ultrasonic hyperthermia, precise acoustic field measurement considering tissue characteristics and a heating experiment with tissue mimicking material phantom were conducted for effectiveness of simulation program. Finally, in this study, the computer simulation program verified the anticipated temperature effects induced by ultrasound hyperthermia. In the near future, it is hoped that this simulation program could be utilized to improve the efficiency of ultrasound hyperthermia.

Microwave Cavity with Controllable Temperature for In Vitro Hyperthermia Investigations

  • Kiourti, Asimina;Sun, Mingrui;He, Xiaoming;Volakis, John L.
    • Journal of electromagnetic engineering and science
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    • v.14 no.3
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    • pp.267-272
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    • 2014
  • Hyperthermia is a form of cancer treatment in which affected human tissue is exposed to $>40^{\circ}C$ temperature. In this paper, our goal is to assess the efficacy of fullerene agents to reduce heating time for cancer treatment. Such agents can accelerate heating of cancer cells and improve hyperthermia treatment efficacy. Typically, in vitro testing involves cancer cell culturing, heating cell cultures in accordance to specifications, and recording cancer cell viability after hyperthermia. To heat cell cultures, we design and evaluate a 2.4-GHz microwave cavity with controllable temperature. The cavity is comprised of a polystyrene cell culture dish (diameter = 54 mm, height = 13.5 mm) and a printed monopole antenna placed within the cavity for microwave heating. The culture temperature can be controlled through the intensity and duration of the antenna's microwave radiation. Heating experiments were carried out to validate the cavity's performance for F-12K culture medium (Kaighn's F-12K medium, ATCC). Importantly, fullerene agents were shown to reduce heating time and improve hyperthermia treatment efficacy. The culture medium temperature increased, on average, from $24.0^{\circ}C$ to $50.9^{\circ}C$ (without fullerene) and from $24.0^{\circ}C$ to $56.8^{\circ}C$ (with 3 mg/mL fullerene) within 15 minutes.

An Experimental Study on the Effects of X-ray Irradiation and Hyperthermia on the Rat Testis (X-선 조사와 온열요법이 백서고환에 미치는 영향에 관한 실험적 연구)

  • Lee, Kyung-Ja
    • Radiation Oncology Journal
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    • v.8 no.1
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    • pp.17-27
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    • 1990
  • The effects of both hyperthermia alone and X-ray irradiation combined with hyperthermia on rat testis have been investigated. The histological changes were observed on 15 and 30 days after treatment. There was no histological change of rat testis by hyperthermia alone. The earliest change by X-ray irradiation was the degeneration of the spermatogonia of the seminiferous tubule, which was appeared in 2 Gy group. Necrosis of the spermatogonia was severe in 6 Gy group and complete atrophy was developed in 8 Gy group. With increased dose of radiation, the degree of changes of tubules was increased. In combined group of X-ray irradiation and hyperthermia, the histological change of the seminiferous tubule was more severe than X-ray alone group. Necrosis and atrophy of the spermatogonia were appeared in 2 Gy and complete atrophy of spermatogonia was seen in 6 Gy group. Thermal enhancement ratio (calculated at the complete atrophy of the spermatogonia) was 1.3 in this experiment. There was no difference in observation time inverval between 15 and 30 days after each treatment in all groups.

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Hyperthermia for Head and Neck Cancer - Preliminary Result of Hyperthermia Using 8 MHz Radiofrequency in Treatment of Advanced and Recurrent Head and Neck Cancer- (두경부암의 온열요법 -국소적으로 진행 혹은 재발된 두경부암 치료에 있어서 8MHz 라디오파를 이용한 온열요법의 중간보고 -)

  • Park K.R.;Lee C.G.;Kim S.K.;Cho K.H.;Suh C.O.;Kim G.E.;Loh J.K.;Kim B.S.;Hong W.P.;Park C.S.
    • Korean Journal of Head & Neck Oncology
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    • v.3 no.1
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    • pp.107-114
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    • 1987
  • Clinical application of hyperthermia using 8 MHz radiofrequency(capacitive type THERMOTRON RF-8) in cancer treatment was begun at Yonsei Cancer Center in 1985. From April 1985 to April 1986, 23 patients with loco-regionally advanced and persistent or recurrent carcinomas of the head and neck were treated with hyperthermia at the Department of Radiation Oncology, Yonsei University College of Medicine. Radiation therapy and/or chemotherapy were combined with hyperthermia to improve the tumor response. The response rate of 23 patients was 52%, 4 had complete response, and 7 had partial response. The factors affecting the tumor response were dose of irradiation(P=0.009). Complications related to treatment were found in 8 patients and all of them were self-limited. The result of this study indicates that localized hyperthermia as a combined modality has a significant role in palliation of advanced and recurrent head and neck cancer.

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Effect of hyperthermia on cell viability, amino acid transfer, and milk protein synthesis in bovine mammary epithelial cells

  • Zhou, Jia;Yue, Shuangming;Xue, Benchu;Wang, Zhisheng;Wang, Lizhi;Peng, Quanhui;Hu, Rui;Xue, Bai
    • Journal of Animal Science and Technology
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    • v.64 no.1
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    • pp.110-122
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    • 2022
  • The reduction of milk yield caused by heat stress in summer is the main condition restricting the economic benefits of dairy farms. To examine the impact of hyperthermia on bovine mammary epithelial (MAC-T) cells, we incubated the MAC-T cells at thermal-neutral (37℃, CON group) and hyperthermic (42℃, HS group) temperatures for 6 h. Subsequently, the cell viability and apoptotic rate of MAC-T cells, apoptosis-related genes expression, casein and amino acid transporter genes, and the expression of the apoptosis-related proteins were examined. Compared with the CON group, hyperthermia significantly decreased the cell viability (p < 0.05) and elevated the apoptotic rate (p < 0.05) of MAC-T cells. Moreover, the expression of heat shock protein (HSP)70, HSP90B1, Bcl-2-associated X protein (BAX), Caspase-9, and Caspase-3 genes was upregulated (p < 0.05). The expression of HSP70 and BAX (pro-apoptotic) proteins was upregulated (p < 0.05) while that of B-cell lymphoma (BCL)2 (antiapoptotic) protein was downregulated (p < 0.05) by hyperthermia. Decreased mRNA expression of mechanistic target of rapamycin (mTOR) signaling pathway-related genes, amino acid transporter genes (SLC7A5, SLC38A3, SLC38A2, and SLC38A9), and casein genes (CSNS1, CSN2, and CSN3) was found in the heat stress (HS) group (p < 0.05) in contrast with the CON group. These findings illustrated that hyperthermia promoted cell apoptosis and reduced the transport of amino acids into cells, which inhibited the milk proteins synthesis in MAC-T cells.

In vivo verification of regional hyperthermia in the liver

  • Noh, Jae Myoung;Kim, Hye Young;Park, Hee Chul;Lee, So Hyang;Kim, Young-Sun;Hong, Saet-Byul;Park, Ji Hyun;Jung, Sang Hoon;Han, Youngyih
    • Radiation Oncology Journal
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    • v.32 no.4
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    • pp.256-261
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    • 2014
  • Purpose: We performed invasive thermometry to verify the elevation of local temperature in the liver during hyperthermia. Materials and Methods: Three 40-kg pigs were used for the experiments. Under general anesthesia with ultrasonography guidance, two glass fiber-optic sensors were placed in the liver, and one was placed in the peritoneal cavity in front of the liver. Another sensor was placed on the skin surface to assess superficial cooling. Six sessions of hyperthermia were delivered using the Celsius TCS electro-hyperthermia system. The energy delivered was increased from 240 kJ to 507 kJ during the 60-minute sessions. The inter-session cooling periods were at least 30 minutes. The temperature was recorded every 5 minutes by the four sensors during hyperthermia, and the increased temperatures recorded during the consecutive sessions were analyzed. Results: As the animals were anesthetized, the baseline temperature at the start of each session decreased by $1.3^{\circ}C$ to $2.8^{\circ}C$ (median, $2.1^{\circ}C$). The mean increases in temperature measured by the intrahepatic sensors were $2.42^{\circ}C$ (95% confidence interval [CI], 1.70-3.13) and $2.67^{\circ}C$ (95% CI, 2.05-3.28) during the fifth and sixth sessions, respectively. The corresponding values for the intraperitoneal sensor were $2.10^{\circ}C$ (95% CI, 0.71-3.49) and $2.87^{\circ}C$ (1.13-4.43), respectively. Conversely, the skin temperature was not increased but rather decreased according to application of the cooling system. Conclusion: We observed mean $2.67^{\circ}C$ and $2.87^{\circ}C$ increases in temperature at the liver and peritoneal cavity, respectively, during hyperthermia. In vivo real-time thermometry is useful for directly measuring internal temperature during hyperthermia.

Prospective phase II trial of regional hyperthermia and whole liver irradiation for numerous chemorefractory liver metastases from colorectal cancer

  • Yu, Jeong Il;Park, Hee Chul;Choi, Doo Ho;Noh, Jae Myoung;Oh, Dongryul;Park, Jun Su;Chang, Ji Hyun;Kim, Seung Tae;Lee, Jeeyun;Park, Se Hoon;Park, Joon Oh;Park, Young Suk;Lim, Ho Yeong;Kang, Won Ki
    • Radiation Oncology Journal
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    • v.34 no.1
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    • pp.34-44
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    • 2016
  • Purpose: A prospective phase II trial was conducted to evaluate the effectiveness and toxicity of regional hyperthermia and whole liver irradiation (WLI) for numerous chemorefractory liver metastases from colorectal cancer. Materials and Methods: Enrolled patients had numerous chemorefractory hepatic metastases from colorectal cancer. Five sessions of hyperthermia and seven fractions of 3-gray WLI were planned. Health-related quality of life (HRQoL) was determined using the Korean version of the European Organization for Research and Treatment of Cancer quality of life questionnaire C-30 and the Functional Assessment of Cancer Therapy-Hepatobiliary version 4.0. Objective and pain response was evaluated. Results: A total of 12 patients consented to the study and the 10 who received WLI and hyperthermia were analyzed. WLI was completed as planned in nine patients and hyperthermia in eight. Pain response was partial in four patients and stable in four. Partial objective response was achieved in three patients (30.0%) and stable disease was seen in four patients at the 1-month follow-up. One patient died 1 month after treatment because of respiratory failure related to pleural metastasis progression. Other grade III or higher toxicities were detected in three patients; however, all severe toxicities were related to disease progression rather than treatment. No significant difference in HRQoL was noted at the time of assessment for patients who were available for questionnaires. Conclusion: Combined WLI and hyperthermia were well tolerated without severe treatment-related toxicity with a promising response from numerous chemorefractory hepatic metastases from colorectal cancer.

MALIGNANT HYPERTHERMIA - A Case Report - (악성고열증 1예 보고)

  • Chang, Hak-Weon;Park, Kwan-Su;Kim, Chang-Whan;Nam, Dong-Seok;Park, Hyo-Sang;Park, No-Boo;Kim, Jong-Bae
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.19 no.1
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    • pp.109-114
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    • 1997
  • Malignant hyperthermia is a hypermetabolic, fatal syndrome triggered by anesthetic drugs that occurs frequently in genetically susceptible persons. It is characterized by tachycardia, rapidly increasing temperature, skeletal muscle rigidity, respiratory and metabolic acidosis, cyanosis etc. It has been noted that the majority of cases of malignant hyperthermia are fatal unless early diagnosis and treatment are performed. Thus, the accurate prediction of preanesthetic susceptibility and early diagnosis of malignant hyperthermia is necessary to appropriate treatment. Dantrolene sodium has been shown to be effective in the prevention and treatment of malignant hyperthermia. We experienced a case of malignant hyperthermia, which is presented of a 32-year-old healthy male patient in whom a orthognatic surgery was performed under $O_2-N_2O$-enfl-rane anesthesia with induction by pentobarbital and succinylcholine. We discuss this case with reviewing the history, incidence, etiology, pathophysiology, clinical signs & biochemical changes, prevention & treatment.

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