预测看不见的:基于扩散的脱基框架,用于在单细胞分辨率下预测转录反应.
Ergan Shang1, Yuting Wei2, Kathryn Roeder1,3
1Department of Statistics and Data Science, Carnegie Mellon University, Pittsburgh, PA 15213.
bioRxiv : the preprint server for biology
|September 26, 2025
概括
我们开发了dbDiffusion,这是一个计算工具,可以准确预测细胞对遗传干扰的反应. 这种方法通过推断基因表达变化对未测量的遗传变化,提高了Perturb-seq实验的实用性.
科学领域:
- 计算生物学 计算生物学
- 基因组学就是基因组学.
- 基因法规 基因法规
背景情况:
- 预测细胞对遗传干扰的反应对于理解基因调节至关重要.
- 像Perturb-seq这样的单细胞CRISPR扰动测定提供了直接的基因功能测量,但受到规模的限制.
- 需要计算方法来从现有数据中推断对未测量的干扰的反应.
研究的目的:
- 介绍dbDiffusion,这是一个用于预测转录组扰动反应的新型生成框架.
- 为了能够准确地推断基因表达变化对于未观察到的遗传扰乱.
- 开发一种可扩展的计算方法,扩展 Perturb-seq 实验的实用性.
主要方法:
- dbDiffusion 在一个变化自编码器 (VAE) 框架中集成了无分类器指导的扩散模型.
- 该模型在潜空间中运行,利用基因表达和扰动关系中的生物相似性.
- 它利用从测量干扰中嵌入到未见的干扰中进行概括,避免依赖大型语言模型.
主要成果:
- 与 Perturb-seq 数据集上的最先进的方法相比,dbDiffusion 在预测扰动响应方面表现出更高的准确性.
- 该框架通过利用生物相似性,成功地为以前未被观察到的扰动生成基因表达.
- 预测驱动推理的整合纠正了生成模型偏差,使得统计学上严格的下游分析,如差异基因表达识别.
结论:
- dbDiffusion提供了一个可扩展和准确的计算框架,用于预测和分析转录组扰动反应.
- 该方法提高了单细胞扰动实验的成本效益和范围.
- 这种方法促进了对基因调节的理解,通过能够预测更广泛的遗传扰乱.
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