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相关概念视频

Increased Body Temperature01:25

Increased Body Temperature

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A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in...
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Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

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Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
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Desensitization and Tachyphylaxis01:20

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Tachyphylaxis is described as a rapid decrease in response to a drug after repeated or continuous administration of the same drug dose. It is a phenomenon where the body becomes less responsive to a particular substance or intervention over time, requiring higher doses or stronger interventions to achieve the same effect. It results from adaptive changes in the body's receptors, signaling pathways, or physiological processes that occur in response to prolonged exposure to a stimulus.
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Thermosensation01:43

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
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相关实验视频

Updated: Jul 13, 2025

Author Spotlight: Computing the Effects of a Local Radiofrequency Hyperthermia Intervention on Tumor Biomechanics
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通过高热度的辐射敏感性严重依赖于时间间隔.

Xionge Mei1, H Petra Kok2, Hans M Rodermond1

  • 1Department of Radiation Oncology, University of Amsterdam, Amsterdam UMC, Amsterdam, The Netherlands; Center for Experimental and Molecular Medicine (CEMM), Laboratory for Experimental Oncology and Radiobiology (LEXOR), Amsterdam, The Netherlands; Cancer Biology and Immunology, Cancer Center Amsterdam, Amsterdam, The Netherlands.

International journal of radiation oncology, biology, physics
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PubMed
概括

缩短高温和放射治疗之间的间隔显著改善局部晚期宫癌 (LACC) 患者的结果. 治疗的顺序不会影响结果,使得时间成为增强辐射敏感性的关键因素.

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科学领域:

  • 在瘤学瘤学.
  • 辐射瘤学 辐射瘤学
  • 癌症生物学 癌症生物学

背景情况:

  • 过热可以提高局部晚期宫癌 (LACC) 的辐射疗法的疗效.
  • 高热和放射治疗的最佳时间和顺序仍在研究中,用于LACC治疗.

研究的目的:

  • 确定高热和放射治疗间隔和顺序对LACC治疗结果的影响.
  • 在临床前模型和临床数据中评估高热辐射敏感性.

主要方法:

  • 使用宫癌细胞系和患者衍生器官的体外研究.
  • 在实体研究中,小鼠使用SiHa子宫癌异种移植.
  • 对58名接受热辐射治疗的LACC患者的回顾性分析.

主要成果:

  • 加热和放射治疗之间的间隔缩短,使放射敏感度增加了2至8倍,导致更多的DNA损伤和亡.
  • 细胞存活率降低了10-100倍,在小鼠中延迟瘤生长,并在LACC患者中改善了5年存活率.
  • 过热和放射治疗的顺序并没有显著影响治疗结果.

结论:

  • 过热和放射治疗之间的较短间隔显著改善了LACC的治疗结果.
  • 过热和放射治疗的顺序对治疗疗效没有影响.