癌症的过水:一种特征性的生物物理特征,强烈增加O,CO,葡萄糖和乳酸扩散率,并改善固体恶性瘤的热物理特性
Peter Vaupel1,2, Helmut Piazena3
1Department of Radiation Oncology, University Medical Center, University of Freiburg, Freiburg/Breisgau, Germany. vaupel@uni-mainz.de.
Advances in experimental medicine and biology
|October 16, 2023
概括
癌症表现出独特的生物物理特性,包括更高的水含量,影响扩散和热传输. 了解这些癌症特征对于在瘤热辐射治疗中准确建模至关重要.
科学领域:
- 在瘤学瘤学.
- 生物物理学的生物物理.
- 医学物理 医学物理
背景情况:
- 癌症具有复杂的,侵略性的生物物理特征,超出了生物特征.
- 固体瘤通常与健康组织相比,水分含量 (过水) 显著增加.
- 这些差异影响生理过程和治疗反应.
研究的目的:
- 突出癌症特异生物物理特性在扩散和热分析中的重要性.
- 强调需要将这些特性纳入瘤热辐射疗法模型.
- 为了提高氧气,葡萄糖和热传输在瘤中的模拟的准确性.
主要方法:
- 在癌症组织中分析O2,CO2,葡萄糖和乳酸的Fick扩散系数 (D).
- 在瘤中评估特定热容量 (cp) 和热导率 (k).
- 对扩散建模和高温症治疗计划的影响的审查.
主要成果:
- 由于过度水分,癌症对关键分子的扩散系数较高.
- 瘤表现出增加的特定热容量和热导率.
- 这些改变的特性显著影响了瘤微环境中的物质和热量传输.
结论:
- 癌症特定的生物物理数据 (扩散,热容量,热导率) 对于准确的建模至关重要.
- 准确的建模对于有效的瘤热辐射疗法至关重要,包括扩散分析和高温症规划.
- 忽视这些特性可能会导致对治疗结果的不可靠预测.
相关概念视频
Disorder of Water Balance
424
Water balance disorders are medical conditions that occur when there is a deviation from the body's water volume or osmolarity, disrupting normal homeostasis and leading todehydration, hypotonic hydration, hyperhydration, edema, or water intoxication.
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
424
Adaptive Mechanisms in Cancer Cells
5.8K
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
5.8K
Homeostatic Imbalances in Body Temperature
136
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...
136
Cancer Therapies
7.7K
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
7.7K
Increased Body Temperature
685
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...
685
Strength and Heat of Hydration
250
The hydration of cement is an exothermic reaction in which heat is generated as cement hydrates. This heat of hydration is critical to cement's strength development. The rate at which this heat is generated affects the temperature rise, with a majority of the heat being released early in the hydration process, half within the first three days, and about 75% within the first week.
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
250


