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arXiv 2412.03027q-bio.GN
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时间序列单细胞RNA-seq表达数据的时间戳校准

Timestamp calibration for time-series single cell RNA-seq expression data

Xiran Chen, Sha Lin, Xiaofeng Chen, Weikai Li, Yifei Li

AI总结:

针对时间序列单细胞RNA-seq数据中时间戳噪声问题,提出ScPace模型,利用潜在变量指示器检测噪声样本,实验证明其优于现有方法并提升拟时间分析性能。

摘要:

时间戳自动标注(TAA)是分析时间序列ScRNA-seq数据的关键步骤,因为这些数据揭示了动态的生物学发育过程和细胞再生机制。然而,当前的TAA方法严重依赖人工时间戳,往往忽视其可靠性。这种忽视可能因噪声时间戳而显著降低时间戳自动标注的性能。尽管如此,目前解决该问题的方法倾向于选择不太关键的清洁样本进行时间戳校准。为应对这一挑战,我们开发了一种新颖的时间戳校准模型,称为ScPace,用于处理带噪声标签的时间序列ScRNA-seq数据。该方法在基础分类器中引入潜在变量指示器,而非概率采样,以有效检测噪声样本。为验证所提方法,我们在模拟和真实的时间序列ScRNA-seq数据集上进行了实验。在不同人工错误标注率下的交叉验证实验表明,ScPace优于先前的方法。此外,使用我们的方法校准原始时间序列ScRNA-seq数据的时间戳后,我们进行了有监督的拟时间分析,结果显示ScPace显著提升了其性能。这些发现表明,ScPace是一种有效的时间戳校准工具,能够对检测到的噪声标签样本进行重新分类和删除,同时在不同范围的时间序列ScRNA-seq数据集中保持鲁棒性。源代码可在https://github.com/OPUS-Lightphenexx/ScPace获取。

英文摘要:

Timestamp automatic annotation (TAA) is a crucial procedure for analyzing time-series ScRNA-seq data, as they unveil dynamic biological developments and cell regeneration process. However, current TAA methods heavily rely on manual timestamps, often overlooking their reliability. This oversight can significantly degrade the performance of timestamp automatic annotation due to noisy timestamps. Nevertheless, the current approach for addressing this issue tends to select less critical cleaned samples for timestamp calibration. To tackle this challenge, we have developed a novel timestamp calibration model called ScPace for handling noisy labeled time-series ScRNA-seq data. This approach incorporates a latent variable indicator within a base classifier instead of probability sampling to detect noisy samples effectively. To validate our proposed method, we conducted experiments on both simulated and real time-series ScRNA-seq datasets. Cross-validation experiments with different artificial mislabeling rates demonstrate that ScPace outperforms previous approaches. Furthermore, after calibrating the timestamps of the original time-series ScRNA-seq data using our method, we performed supervised pseudotime analysis, revealing that ScPace enhances its performance significantly. These findings suggest that ScPace is an effective tool for timestamp calibration by enabling reclassification and deletion of detected noisy labeled samples while maintaining robustness across diverse ranges of time-series ScRNA-seq datasets. The source code is available at https://github.com/OPUS-Lightphenexx/ScPace.

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。

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