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JoVE Encyclopedia of Experiments
Cancer Research
福尔马林固定石蜡包埋肿瘤样本的制备:保存非小细胞肺癌 (NSCLC) 组织和细胞学样本的方案
福尔马林固定石蜡包埋肿瘤样本的制备:保存非小细胞肺癌 (NSCLC) 组织和细胞学样本的方案
Encyclopedia of Experiments
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Encyclopedia of Experiments Cancer Research
Preparation of Formalin-Fixed Paraffin-Embedded Tumor Samples: A Protocol to Preserve Tissue and Cytology Samples from Non-small Cell Lung Cancer (NSCLC)

福尔马林固定石蜡包埋肿瘤样本的制备:保存非小细胞肺癌 (NSCLC) 组织和细胞学样本的方案

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3,510 Views
03:39 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

- 首先,从支气管清洗液(一种含有气道内部细胞的盐水洗涤液)中获取组织样本或细胞学样本形式的肺肿瘤标本。为了制备组织样品,将新鲜解剖的肺组织转移到包埋盒中。用适当浓度的福尔马林固定并保存组织。

为了制备细胞学样品,首先,用 DL-二硫苏糖醇处理支气管洗涤液以进行均质化。离心并去除上清液。接下来,用粘液溶解溶液处理以液化粘液并分离细胞。离心使细胞沉淀并用福尔马林固定。用合适的细胞块制备试剂处理细胞,以便在处理小体积沉淀物时浓缩样品。

将沉淀转移到包埋盒中。通过一系列分级酒精浴对两种样品进行脱水来处理这两种样品。使用适当的清除剂去除酒精,然后进行蜡质渗透。将包埋盒嵌入液体石蜡中并使其凝固。这会在组织周围形成一层,将标本固定到位。

使用切片机获得薄片切片。将切片放在带正电的载玻片上,以促进粘附。干燥和染色,以便在显微镜下观察载玻片。在以下方案中,我们展示了来自肺肿瘤组织和细胞学样本的标本制备技术。

首先,将肿瘤组织固定在盒中的 10% 中性缓冲福尔马林中,并按照文本方案中的概述将盒嵌入石蜡中。将浸润的组织嵌入充满熔融石蜡的模具中。让组织留在模具中,直到石蜡凝固。在此之后,使用切片机以 3 微米的厚度对石蜡包埋的组织进行切片。

将石蜡带转移到带正电荷的玻璃显微镜载玻片上。然后在 37 摄氏度下干燥玻片 1 小时。首先,将支气管冲洗液收集在保存溶液中。将清洗液转移到 50 毫升锥形管中。加入 2 克 DL-二硫苏糖醇,涡旋试管 30 分钟。然后在室温下以 250 x g 离心 5 分钟。

去除上清液,加入 10 毫升粘液溶解溶液。以中速摇动样品 20 分钟,并在室温下以 250 倍 g 离心 5 分钟。在此之后,去除上清液并将细胞沉淀物沉积到含有 10% 中性缓冲福尔马林的收集管中。

加入四滴细胞块制备剂。将细胞沉淀转移到盒中。使用前面描述的制备肿瘤组织样品的过程固定细胞沉淀以进行石蜡包埋和切片。

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