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Weakly supervised latent variable inference of proximity bias in crispr gene knockouts from single-cell images
Paper Details
Published: 2025/11/19
Container Title: LMRL Workshop at ICLR 2025
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PDFHigh-throughput screening enables biologists to study cell perturbations by gen erating large, high-dimensional datasets, such as gene expression profiles and cell microscopy images. Particularly in CRISPR-Cas9 screens, where gene knockout effects are typically represented using perturbation-specific conditional mean em beddings, these representations can be distorted by off-target effects in which the knockouts impact not only the target gene but also neighboring genes on the same chromosomearm, introducing “proximity bias”. To address this, we develop a dis crete latent variable inference method that leverages correlations between neigh boring perturbations as a weak supervision signal to detect single cells affected by off-target effects. Removing these cells reduces spurious correlations between adjacent gene embeddings, achieving comparable correction performance without relying on additional gene expression data. Moreover, we show that the identified cells exhibit chromosome-arm specificity, reinforcing the validity of our approach and its potential for scaling into a genome-wide proximity bias correction method
Authors
Kristina Ulicna
Jana Osea
Konstantin Donhauser