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JoVE Encyclopedia of Experiments
Cancer Research
对前列腺癌组织进行采样以进行生物样本库:一种 MRI 引导的靶向技术,用于从新鲜肿瘤组织中去除活检穿孔
对前列腺癌组织进行采样以进行生物样本库:一种 MRI 引导的靶向技术,用于从新鲜肿瘤组织中去除活检穿孔
Encyclopedia of Experiments
Cancer Research
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Encyclopedia of Experiments Cancer Research
Sampling Prostate Cancer Tissue for Biobanking: An MRI-guided Targeted Technique to Remove Biopsy Punches from Fresh Tumor Tissue

对前列腺癌组织进行采样以进行生物样本库:一种 MRI 引导的靶向技术,用于从新鲜肿瘤组织中去除活检穿孔

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04:37 min
July 8, 2025
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Transcript

生物样本库涉及出于研究目的收集和储存生物组织标本或液体。要对前列腺癌标本进行生物样本库,首先获取前列腺的轴向或横向平面MRI图像以识别肿瘤。随后,获得相应的冠状或正面图像以标记准确的肿瘤位置。

接下来,收集荷瘤前列腺。使用组织标记墨水,在器官的左侧和右侧涂漆以表示手术边缘,并在随后的取样过程中识别组织碎片的正确方向。

将标记的前列腺放在预先组装好的切片装置上,使其基部和顶端朝向相对的壁,后侧朝下,前侧朝上。将销钉放在前列腺周围以获得紧密贴合。

测量从基部到顶点的前列腺长度。将其与冠状图像进行比较以发现肿瘤位置。找到最靠近肿瘤区域的引脚。将切片刀片安装在标记销的两侧。切割组织以获得携带肿瘤的横向切片。

以轴向MRI图像为指导,在切片上定位肿瘤。打出肿瘤的所需区域。储存标本用于下游生物样本库应用。

采集标本后,用70%乙醇对层流罩和前列腺切片装置进行灭菌,并在标准秤上称重前列腺(以克为单位)。然后,用蓝色墨水涂上标本的右侧和黑色墨水的左侧,用墨水覆盖整个囊膜和精囊,以便辨别手术边缘。

要切开前列腺,请将组织的基部和顶端朝向设备的相对壁,后侧朝下,前侧朝上。在组织标本周围放置金针,如有必要,稍微向内推动前列腺以达到紧密贴合,并测量从基部到顶点的前列腺长度,以将该测量值与 MRI 测量的前列腺长度进行比较。

如果前列腺已经缩小,则将预期的切片位置调整为适当的缩小百分比。接下来,从底部到所需的横向切片进行测量,并选择最接近该测量值的引脚进行切片。戴上链甲手套以防止受伤,将切片装置的刀片放在已识别销钉的两侧,并使用垫片使刀片保持 5 毫米的距离。

要获取切片,请使用长行程缓慢但坚定地向下、向前和向后移动刀片,在拆卸设备之前通过感觉确认已分离完整的切片。然后,取下壁和别针,并戴上手套小心地将切片转移到一块无菌软木板上。

获取标本后,目视检查横向切片以与轴向 MRI 图像进行比较。在某些情况下,肿瘤区域可能看起来比周围组织更苍白。轻轻触诊横向切片。肿瘤可能感觉比周围组织更坚硬。以轴向MRI图像为指导,选择一个或多个区域进行采样,并使用6毫米冲头向下推感兴趣的组织区域。

在

现场扭动组织冲头并向下抵住软木塞以确保完全分离,必要时使用锋利的手术刀将活检样本与标本分离。采集样品后,取下冲头并使用柱塞将样品弹射到适当的容器中,以进行后续的下游分析。

Key Terms and Definitions

  • Biobanking - Collection and storage process of biological specimens for research.
  • Prostate MRI - Medical imaging used to identify and locate prostate tumors.
  • Prostate Tumor Sample - A portion of the prostate tumor collected for study.
  • Fresh Tissue Biopsy - A procedure to obtain a fresh tissue sample from the body for diagnosis.
  • Prostate Orientation - Refers to the positioning and direction of the prostate gland during medical procedures.

Scientific Background

  • Introduce Biobanking – It’s the process of preserving biological samples (e.g., prostate cancer tissue).
  • Key Concepts – Highlighting the procedures of locating and sampling prostate tumors (e.g., prostate MRI video).
  • Underlying Mechanisms – Discuss the biopsy and sampling techniques used (e.g., fresh tissue biopsy).
  • Connect to Experiment – Explain how the collected sample is prepared and stored for downstream applications.

Questions that this video will help you answer

  • What is biobanking and how does it help in preserving prostate cancer tissues?
  • How do medical practitioners locate and sample prostate tumors?
  • What procedures are followed during a fresh tissue biopsy?

Applications and Relevance

  • Practical Applications – Discuss how biobanking aids in medical and biological research (e.g., prostate cancer biobank).
  • Industry Impact – Highlights the role of biobanking in healthcare and medical research (e.g., cancer research).
  • Societal Importance – Touch on the broader benefits of biobanking for disease study and target drug development (e.g., health progress).
  • Link to Scientific Advancements – Brief note on how biobanking supports new medical discoveries and innovations.

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