Glucose transporter Glut-1 is detectable in peri-necrotic regions in many human tumor types but not normal tissues: Study using tissue microarrays.

Glucose transporter Glut-1 is detectable in peri-necrotic regions in many human tumor types but not normal tissues: Study using tissue microarrays.
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DOI:
10.1016/j.aanat.2010.03.001
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发表时间:
2010-05-20
期刊:
Annals of anatomy = Anatomischer Anzeiger : official organ of the Anatomische Gesellschaft
影响因子:
--
通讯作者:
Hewitt SM
Hewitt SM
中科院分区:
其他
文献类型:
--
作者:
Airley R;Evans A;Mobasheri A;Hewitt SM

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缺氧的肿瘤微环境与恶性进展和治疗反应不佳有关。葡萄糖转运蛋白 Glut-1 是一种预后因素和假定的缺氧标志物。到目前为止,Glut-1 在癌症中的研究已经在一系列个体活检或手术标本中使用了常规免疫组织化学分析。然而,组织微阵列提供了一种快速、廉价的生物标志物表达分析方法。为了评估缺氧标志物,组织核心必须显示缺氧的结构特征;即坏死区域周围的活组织。 Glut-1 可能是一种有用的生物标志物,可验证组织微阵列用于癌症缺氧调节基因的研究。在这项研究中,我们在一系列组织微阵列中对许多肿瘤和正常组织类型中的 Glut-1 蛋白进行了免疫组织化学检测。 Glut-1 经常出现在坏死周围区域,出现在 9/34 淋巴瘤、6/12 黑色素瘤和 5/16 胶质母细胞瘤中; 43/54 为肺肿瘤,22/84 为结肠肿瘤,23/60 为卵巢肿瘤。在乳腺癌 (6/40) 和前列腺 (1/57) 肿瘤中表达很少,而在正常组织中,仅限于脾、舌和中枢神经系统内皮细胞。总之,组织微阵列能够观察坏死周围区域的 Glut-1 表达,这可能与缺氧有关,并反映了先前的研究显示肿瘤类型和非恶性组织中 Glut-1 表达的差异。
The hypoxic tumor microenvironment is associated with malignant progression and poor treatment response. The glucose transporter Glut-1 is a prognostic factor and putative hypoxia marker. So far, studies of Glut-1 in cancer have utilized conventional immunohistochemical analysis in a series of individual biopsy or surgical specimens. Tissue microarrays, however, provide a rapid, inexpensive means of profiling biomarker expression. To evaluate hypoxia markers, tissue cores must show the architectural features of hypoxia; i.e. viable tissue surrounding necrotic regions. Glut-1 may be a useful biomarker to validate tissue microarrays for use in studies of hypoxia-regulated genes in cancer. In this study, we carried out immunohistochemical detection of Glut-1 protein in many tumor and normal tissue types in a range of tissue microarrays. Glut-1 was frequently found in peri-necrotic regions, occurring in 9/34 lymphomas, 6/12 melanomas, and 5/16 glioblastomas; and in 43/54 lung, 22/84 colon, and 23/60 ovarian tumors. Expression was rare in breast (6/40) and prostate (1/57) tumors, and in normal tissue, was restricted to spleen, tongue, and CNS endothelium. In conclusion, tissue microarrays enable the observation of Glut-1 expression in peri-necrotic regions, which may be linked to hypoxia, and reflect previous studies showing differential Glut-1 expression across tumor types and non-malignant tissue.
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