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bioRxiv · 10.64898/2026.05.23.727398

ClusToRa: A niche-centric framework for identifying structural recruitment and infiltration in spatial omics

Githaka, J. M.·Lerner, E. P.
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Abstract

Spatial omics maps cellular landscapes, yet current tools might conflate stochastic proximity with organized niches. We present ClusToRa (Cluster-to-Randomization), a framework that identifies high-density cellular territories and quantifies cell-type recruitment using a fixed-position null model. Benchmarked against graph-based neighborhood-enrichment and point-pattern statistics, ClusToRa reduced false-positive enrichment in simulations and resolved core-vs-boundary interactions. Applied to cirrhotic MASH liver, ClusToRa identifies stellate-cell territories with immune/endothelial infiltration and stress-, Notch-, and PPAR-associated programs, providing a niche-centric framework for distinguishing structural cellular infiltration from boundary adjacency or density-driven colocalization.

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Githaka, J. M., Lerner, E. P.. 2026-05-27. ClusToRa: A niche-centric framework for identifying structural recruitment and infiltration in spatial omics. https://doi.org/10.64898/2026.05.23.727398

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