arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1801.08447q-bio.QM
收藏

用于数字组织去卷积的损失函数学习

Loss-function learning for digital tissue deconvolution

Franziska Görtler, Stefan Solbrig, Tilo Wettig, Peter J. Oefner, Rainer Spang, Michael Altenbuchinger

摘要:

组织的基因表达谱是该组织中所有细胞的表达谱的平均值。数字组织去卷积(DTD)解决了以下逆问题:给定组织的表达谱$y$,该组织的细胞组成$c$是什么?如果$X$是其列是单个细胞类型的参考谱的矩阵,则可以通过针对给定损失函数$\mathcal L$最小化$\mathcal L(y-Xc)$来计算组成$c$。目前的方法使用预定义的通用损失函数。他们成功地量化了组织中的主要细胞,但在检测小细胞群方面往往不足。在这里,我们学习损失函数$\mathcal L$以及组合$c$。这使我们能够适应应用特定的要求,例如专注于小细胞群体或区分表型相似的细胞群体。我们的方法与现有方法一样准确地定量大细胞组分,并显着提高了小细胞群体的检测和相似细胞类型的区分。

英文摘要:

The gene expression profile of a tissue averages the expression profiles of all cells in this tissue. Digital tissue deconvolution (DTD) addresses the following inverse problem: Given the expression profile $y$ of a tissue, what is the cellular composition $c$ of that tissue? If $X$ is a matrix whose columns are reference profiles of individual cell types, the composition $c$ can be computed by minimizing $\mathcal L(y-Xc)$ for a given loss function $\mathcal L$. Current methods use predefined all-purpose loss functions. They successfully quantify the dominating cells of a tissue, while often falling short in detecting small cell populations. Here we learn the loss function $\mathcal L$ along with the composition $c$. This allows us to adapt to application-specific requirements such as focusing on small cell populations or distinguishing phenotypically similar cell populations. Our method quantifies large cell fractions as accurately as existing methods and significantly improves the detection of small cell populations and the distinction of similar cell types.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑