Reproduce “SENCA-st: Integrating Spatial Transcriptomics and Histopathology with Cross Attention Shared Encoder for Region Identification in Cancer Pathology” on OpenResearch

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About this paper

Shanaka Liyanaarachchi, Chathurya Wijethunga, Shihab Aaquil Ahamed, Akthas Absar, Ranga Rodrigo

The SENCA-st deep learning architecture integrates spatial transcriptomics and histopathology with a shared encoder and neighborhood cross-attention to identify functional regions in cancer pathology. It achieved a mean Adjusted Rand Index of 0.304 on the HER2ST breast cancer dataset, exceeding prior methods, and successfully correlated identified regions with known marker genes in Squamous Cell Carcinoma.

Key insights

  • A balanced integration of spatial transcriptomics and histopathology, rather than biased approaches, is critical for accurately identifying functional regions, especially those with subtle functional differences masked by structural similarity.
  • Neighborhood cross-attention effectively captures and leverages the interplay between spatial gene expression and tissue morphology to highlight regions that are structurally alike but functionally distinct.
  • Combining local feature learning (via reconstruction) with global contrastive learning enables robust noise reduction in spatial transcriptomics while preserving fine-grained, biologically meaningful information.

Summary by alphaXiv.

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