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Immunohistochemical detection of epidermal growth factor receptor in human high-grade astrocytomas--a comparison between frozen- and paraffin sections.

机译:人体高级星形细胞瘤中表皮生长因子受体的免疫组织化学检测-冷冻切片和石蜡切片之间的比较。

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The overexpression of epidermal growth factor receptor (EGFR) in human astrocytic tumours is associated with the oncogenesis of these tumours. Ongoing research on diagnostic, prognostic, and therapeutic aspects of this receptor is highly dependent on the development of reliable techniques for the detection of EGFR in tumour tissue. The aim of this study was to assess EGFR expression in human high-grade astrocytomas by means of immunohistochemistry on formalin-fixed, paraffin-embedded sections and to compare these findings with the results of our previous study on frozen sections from these tumours, in which we found about 60% EGFR positivity (10). Four anaplastic astrocytomas and 19 glioblastomas were included in this study. Two different antibodies were used, the monoclonal antibody E30 reactive against the extracellular domain of EGFR and the polyclonal antibody Ab-4 directed against its cytoplasmic domain. With E30, 3 out of 4 anaplastic astrocytomas (75%) and 12 out of 19 glioblastomas (63%) were found to express EGFR whereas Ab-4 demonstrated positive EGFR immunoreactivity in most of the tumours (18/19 glioblastomas and all the 4 anaplastic astrocytomas). In conclusion, immunohistochemistry represents a reliable and convenient technique for the detection of EGFR in tissue sections of human high-grade astrocytomas, and that EGFR immunoreactivity is comparable in frozen- and paraffin sections from these tumours.
机译:人星形细胞肿瘤中表皮生长因子受体(EGFR)的过表达与这些肿瘤的发生有关。对该受体的诊断,预后和治疗方面的正在进行的研究高度依赖于检测肿瘤组织中EGFR的可靠技术的发展。本研究的目的是通过福尔马林固定石蜡包埋切片的免疫组织化学方法评估人类高级星形细胞瘤中EGFR的表达,并将这些发现与我们先前对这些肿瘤冷冻切片的研究结果进行比较,其中我们发现约60%的EGFR阳性(10)。这项研究包括四个间变性星形细胞瘤和19个胶质母细胞瘤。使用两种不同的抗体,对EGFR胞外域具有反应性的单克隆抗体E30和针对其胞质域的多克隆抗体Ab-4。使用E30,发现4个间变性星形细胞瘤中的3个(75%)和19个胶质母细胞瘤中的12个(63%)表达EGFR,而Ab-4在大多数肿瘤(18/19胶质母细胞瘤和所有4个肿瘤)中均表现出阳性EGFR免疫反应性。间变性星形细胞瘤)。总之,免疫组化是检测人类高级星形细胞瘤组织切片中EGFR的可靠便捷技术,在这些肿瘤的冷冻和石蜡切片中EGFR免疫反应性相当。

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