GEN:新成像技术,“更**”分级肿瘤活检

2018-03-15 Tierna 生物探索

近日,伦敦帝国理工学院开发出了一种新的成像技术,来对肿瘤切片进行等级评定,以消除人工操作的主体性,进而确保患者准确接受适时治疗。

近日,伦敦帝国理工学院开发出了一种新的成像技术,来对肿瘤切片进行等级评定,以消除人工操作的主体性,进而确保患者准确接受适时治疗。

这一成果由伦敦帝国理工学院物理系和外科与癌症部领导的研究人员完成,相关成果近日发表在《Convergent Science Physical Oncology》杂志上,阐述了这种新方法如何能显着降低在判定癌症严重等级时的主观性和多变性。

1传统活检

几乎所有的癌症都是由医生进行活检确诊的,就是将待检查组织切成薄片,并用两种已被使用了100多年的植物染料染色(苏木素—伊红染色法),然后在显微镜下观察苏木精和伊红(H + E)染色的样品,最后通过肉眼判断疾病的严重程度。

众所周知,传统活检存在一个的准确度问题,即不同的医疗人员在判断相同的切片时,只有约70%的概率能够对疾病等级的判定达成统一,从而导致患者治疗过度的问题。因此,伦敦帝国理工学院科学家们认为,必须基于这一基础,发明一种更精确的、能够提高人们治疗效果的方法。

2Digistain技术

根据研究人员介绍,新的Digistain技术,使用了中红外成像技术来绘制核酸浓度的分数,即在未染色的活检切片上的核-细胞质化学比(NCR)。

“这项技术可以从癌症的客观物理测量中重复提取与NCR相对应的定量。我们当前的目标是,在双盲临床试验中,将DI指数与H + E指数结合分析,首次评估Digistain技术在辅助癌症诊断中的潜力。”研究人员详述道。

3实验结果

在实验中,研究团队使用了75个乳腺癌活检组织中的两个相邻切片进行了双盲临床试验。临床医生先用常规的H + E方案对第一片进行分级。它也被用来识别所谓的感兴趣区域(RoI),即包含肿瘤的切片部分。

然后,研究团队使用Digistain技术,得到另一个未染色的切片上对相应的RoI求平均值,并对结果进行了统计分析。

传统植物染色活检(左)与同一样本的Digistain活检相比(右)。图片来源:Imperial College London

Phillips博士表示:“即使样本数量不多,我们在DI评分和H + E评分之间的相关性也仅在1400次试验中偶然出现一次,这种强度的相关性使我们非常乐观地认为,Digistain能够消除活检分级中的主观性和可变性。”

4重要意义

Digistain测量的NCR因子能够感知到各种癌症,因为在肿瘤中欧,当生殖细胞周期被破坏时,细胞内的细胞核会受到游离DNA的扭曲。Phillips博士指出,从长远来看,Digistain可以帮助诊断任意类型的癌症。

从实践层面来讲,研究人员表示,Digistain成像技术可以轻松、很便宜地被纳入现有的医院实验室供员工使用。

Phillips博士表示:“通过对已经在医院档案中保存的数千个活检标本进行检查,很容易证明Digistain的价值。一个更精确的结果将会直接影响患者的治疗情况,甚至于挽救他们的生命。”

原始出处:
H Amrania, L Woodley-Barker, K Goddard, et al.Mid-infrared imaging in breast cancer tissue: an objective measure of grading breast cancer biopsies.13 March 2018.Convergent Science Physical Oncology, Volume 4, Number 2

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    2018-03-23 大爰

    学习了谢谢分享!!

    0

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    2018-03-17 smlt2008
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    2018-03-15 紫迎馨

    学习了

    0