Riordan Daniel P, Varma Sushama, West Robert B, Brown Patrick O
Department of Biochemistry, Stanford University School of Medicine, Stanford, California, United States of America; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America.
Department of Pathology, Stanford University School of Medicine, Stanford, California, United States of America.
PLoS One. 2015 Jul 15;10(7):e0128975. doi: 10.1371/journal.pone.0128975. eCollection 2015.
Characterization of the molecular attributes and spatial arrangements of cells and features within complex human tissues provides a critical basis for understanding processes involved in development and disease. Moreover, the ability to automate steps in the analysis and interpretation of histological images that currently require manual inspection by pathologists could revolutionize medical diagnostics. Toward this end, we developed a new imaging approach called multidimensional microscopic molecular profiling (MMMP) that can measure several independent molecular properties in situ at subcellular resolution for the same tissue specimen. MMMP involves repeated cycles of antibody or histochemical staining, imaging, and signal removal, which ultimately can generate information analogous to a multidimensional flow cytometry analysis on intact tissue sections. We performed a MMMP analysis on a tissue microarray containing a diverse set of 102 human tissues using a panel of 15 informative antibody and 5 histochemical stains plus DAPI. Large-scale unsupervised analysis of MMMP data, and visualization of the resulting classifications, identified molecular profiles that were associated with functional tissue features. We then directly annotated H&E images from this MMMP series such that canonical histological features of interest (e.g. blood vessels, epithelium, red blood cells) were individually labeled. By integrating image annotation data, we identified molecular signatures that were associated with specific histological annotations and we developed statistical models for automatically classifying these features. The classification accuracy for automated histology labeling was objectively evaluated using a cross-validation strategy, and significant accuracy (with a median per-pixel rate of 77% per feature from 15 annotated samples) for de novo feature prediction was obtained. These results suggest that high-dimensional profiling may advance the development of computer-based systems for automatically parsing relevant histological and cellular features from molecular imaging data of arbitrary human tissue samples, and can provide a framework and resource to spur the optimization of these technologies.
对复杂人体组织内细胞的分子特性和空间排列以及特征进行表征,是理解发育和疾病相关过程的关键基础。此外,目前需要病理学家进行人工检查的组织学图像分析和解释步骤若能实现自动化,可能会彻底改变医学诊断。为此,我们开发了一种名为多维显微分子分析(MMMP)的新成像方法,该方法可以在亚细胞分辨率下原位测量同一组织标本的几种独立分子特性。MMMP包括抗体或组织化学染色、成像和信号去除的重复循环,最终可以生成类似于对完整组织切片进行多维流式细胞术分析的信息。我们使用一组15种信息丰富的抗体、5种组织化学染色剂加DAPI,对包含102种不同人类组织的组织微阵列进行了MMMP分析。对MMMP数据进行大规模无监督分析,并对所得分类进行可视化,确定了与功能性组织特征相关的分子谱。然后,我们直接对该MMMP系列的苏木精-伊红(H&E)图像进行注释,以便分别标记感兴趣的典型组织学特征(如血管、上皮、红细胞)。通过整合图像注释数据,我们确定了与特定组织学注释相关的分子特征,并开发了用于自动分类这些特征的统计模型。使用交叉验证策略客观评估了自动组织学标记的分类准确性,并获得了较高的准确性(来自15个注释样本的每个特征的中位数像素率为77%)用于从头特征预测。这些结果表明,高维分析可能会推动基于计算机的系统的发展,该系统能够从任意人类组织样本的分子成像数据中自动解析相关的组织学和细胞特征,并可以提供一个框架和资源来促进这些技术的优化。