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JoVE Encyclopedia of Experiments
Cancer Research
肿瘤间质液压力的空间测量:一种测量间质液压力的方法
肿瘤间质液压力的空间测量:一种测量间质液压力的方法
Encyclopedia of Experiments
Cancer Research
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Encyclopedia of Experiments Cancer Research
Spatial Measurement of Tumor Interstitial Fluid Pressure: A Method to Measure the Interstitial Fluid Pressure

肿瘤间质液压力的空间测量:一种测量间质液压力的方法

Protocol
3,341 Views
03:34 min
April 30, 2023
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Transcript

间质液压力 (IFP) 是液体在组织中细胞之间的间隙中施加的力。首先,用 2% 异氟烷与氧气混合麻醉荷瘤小鼠,并将其固定在计算机断层扫描或 CT-IFP 机器人平台上。现在,用造影剂包裹的脂质体注射到小鼠的外侧尾静脉中,以观察肿瘤。将动物放回笼子里,让它恢复。

注射后 48 至 72 小时之间,将麻醉的鼠标固定在 CT-IFP 平台上,并在肿瘤上选择几个均匀分布的位置来测量 IFP。接下来,在插入前用肝素盐水溶液冲洗 IFP 系统针头。将针头放在所选位置并将其插入肿瘤组织内。

现在获取所有位置的图像并使用软件测量 IFP。由于其致密性、异常血管和淋巴系统缺陷,肿瘤中的 IFP 通常很高。这可能导致脂质体在肿瘤外围积累。在以下协议中,我们将演示测量实体瘤中 IFP 的技术。

要测量 IFP,请将动物贴在 CT-IFP 机器人平台上,以便肿瘤被固定并可供 CT-IFP 机器人系统访问。如刚才所示,获得解剖显微 CT 扫描,然后将针前插入数据加载到 CT-IFP 机器人对准软件中,并调整窗口和水平以可视化肿瘤。单击任何图像中肿瘤的边缘,然后在肿瘤的相邻侧选择第二个边缘位置。

软件将沿两点之间的线性线计算一系列位置。然后从列表中选择一系列 5 到 8 个均匀分布位置的 x、y 和 z 坐标。接下来,用生理盐水肝素溶液冲洗 IFP 系统针头,并将第一个预定针头位置输入到 CT-IFP 机器人控制软件的 XYZ 坐标窗口中。

按 Go 按钮将机器人移动到所需位置。然后依次对于每个针头位置,单击 Insert Needle(插入针头)按钮,将针头插入组织。捏住并松开 PE-20 管,以确认 IFP 针头和组织之间有良好的流体交通,并观察 IFP 测量值是否增加并返回到 IFP 采集软件上的预捏值。最后,在插入针头的情况下进行解剖 CT 扫描,单击扫描结束时的缩回针头按钮,将针头从组织中取出。

Key Terms and Definitions

  • Interstitial Fluid Pressure (IFP) - The force exerted by fluid between cells in tissue.
  • Computed Tomography (CT-IFP) - A technique to visualize and measure IFP in tissues.
  • Liposomes - Spheres used to encapsulate and safely deliver contrast agents in imaging.
  • Isofluorane - An anesthetic used to immobilize subjects for procedures.
  • Saline Heparin Solution - Fluid used to flush instruments like IFP system needles.

Scientific Background

  • Introduce Interstitial Fluid Pressure (IFP) - Defined as the force exerted by fluid in-between tissue cells (e.g., IFP).
  • Key Concepts - Summarizing essential information about IFP and methods to visualise and measure it (e.g., CT-IFP platform).
  • Underlying Mechanisms - Short explanation of how dense nature of tumor tissue can lead to higher IFP (e.g., defective lymphatic system).
  • Connect to Experiment - The experiment demonstrates how to measure the IFP in a solid tumor using the CT-IFP robot platform.

Questions that this video will help you answer

  • What is Interstitial Fluid Pressure (IFP), and why is it important in oncology procedures?
  • How does the Computed Tomography IFP robot platform assist in IFP measurements?
  • What are the steps to measure IFP in a solid tumor using the CT-IFP robot platform?

Applications and Relevance

  • Practical Applications – Measuring IFP in tumors assists in effective oncology treatments (e.g., CT-IFP).
  • Industry Impact – Beneficial in healthcare and oncology sectors (e.g., tumor treatment methodologies).
  • Societal Importance – Greater understanding of tumor treatment resulting in improved healthcare (e.g., cancer treatments).
  • Link to Scientific Advancements – The CT-IFP platform facilitates advanced tumor measurements and treatments.

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