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PNAS:质谱分析可能帮助指导脑瘤手术

2014-07-02 佚名 生物360

使用一种基于质谱分析的技术探测肿瘤的代谢物,科研人员报告称,实时诊断可能有助于外科医生在手术室跟踪人类大脑肿瘤的范围。外科切除肿瘤常常需要诊断信息,目前是通过病理学家辛苦而耗费时间的活检显微检查获得的。 Nathalie Agar及其同事使用一种称为电喷雾解吸电离质谱(DESI-MS)的技术,用最少的样本处理在手术室迅速执行,从而检测2-HG,这是一种见于IDH-1 和IDH-2基因突变的人类

使用一种基于质谱分析的技术探测肿瘤的代谢物,科研人员报告称,实时诊断可能有助于外科医生在手术室跟踪人类大脑肿瘤的范围。外科切除肿瘤常常需要诊断信息,目前是通过病理学家辛苦而耗费时间的活检显微检查获得的。

Nathalie Agar及其同事使用一种称为电喷雾解吸电离质谱(DESI-MS)的技术,用最少的样本处理在手术室迅速执行,从而检测2-HG,这是一种见于IDH-1 和IDH-2基因突变的人类大脑肿瘤的代谢物,这两种基因为参与细胞生长和分化的酶编码。

研究人员使用电喷雾解吸电离质谱(DESI-MS)在数分钟时间里区分了有IDH突变的人类大脑肿瘤样本和没有IDH突变的样本,而这种代谢物清晰地勾画出了肿瘤的范围,并且探测到了渗透的肿瘤细胞——这类能力被认为对于优化肿瘤切除和手术的结果具有关键意义。使用安装在美国波士顿的Brigham和女性医院的一间手术室的一台质谱仪,研究人员在手术期间测量了来自两名患星形细胞瘤的脑瘤病人的活检样本中的2-HG,他们提出这种方法可能用于实时诊断,并且有可能清除用其他方法可能会遗漏的肿瘤细胞。

研究人员说,电喷雾解吸电离质谱(DESI-MS)仪器可能有助于描述肿瘤,比组织病理学检查更有效,它们可以安装在手术室中,成本只有用于间接神经外科导航的外科手术MRI机器的一小部分。

原始出处:

Sandro Santagata, Livia S. Eberlin, Isaiah Norton, David Calligaris, Daniel R. Feldman, Jennifer L. Ide,Xiaohui Liu, Joshua S. Wiley, Matthew L. Vestal, Shakti H. Ramkissoon, Daniel A. Orringer,Kristen K. Gill, Ian F. Dunn, Dora Dias-Santagata, Keith L. Ligon, Ferenc A. Jolesz,Alexandra J. Golby, R. Graham Cooks, and Nathalie Y. R. Agar. Intraoperative mass spectrometry mapping of an onco-metabolite to guide brain tumorsurgery. PNAS, June 30, 2014;

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    2015-06-14 drwjr
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    2014-07-04 jxrzshh
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    2014-07-04 jeanqiuqiu

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