{
  "id": 3814077,
  "title": "Scalable spatial DNA sequencing from archival tissue maps copy number subclones",
  "url": "https://urgent.news/2026/08/27/scalable-spatial-dna-sequencing-from-archival-tissue-maps-copy-number",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-27T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.24.746226v1?rss=1"
  },
  "original_language": "en",
  "account": "Scalable spatial DNA sequencing from archival tissue can help reveal copy number subclones, according to a new study. This method, called Adaptive Resolution Multiscale Spatial DNA sequencing (ARMS DNAseq), overcomes technical challenges and high costs of existing spatial genomic assays. By using ultra-low coverage whole genome sequencing at sub-millimeter resolution, ARMS DNAseq can profile copy number alterations (CNAs) at user-defined spatial resolution. The researchers applied the technique to profile CNAs from over 766 regions (tiles) from 3 patients, covering an area of more than 300 mm2. With ARMS DNAseq, the team was able to better understand tumour evolution in a spatial context and identify tumour subclones that were previously obscured or incompletely represented in bulk multi-region whole genome sequencing. Furthermore, the study revealed associations between tumour subclones and morphology, as well as predictions of subclone identity from deep learning-derived image representations. Finally, the researchers demonstrated how ARMS DNAseq integrates with spatial transcriptomic data, showing subclone-specific immune cell co-occurrence and transcriptional programmes cutting across subclone boundaries. This scalable and adaptable workflow for direct spatial copy number profiling from archival tissue sections represents a significant advancement in the field of spatial genomic analysis.",
  "summary": "Spatially resolved DNA sequencing holds promise due to its potential utility in understanding cancer intra-tumour heterogeneity and tumour evolution in relation to tissue architecture. However, it has so far been used to a limited extent due to technical challenges and high cost of existing methods. Hence we aimed to develop a high throughput spatial genomic assay to obtain copy number alteration…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 2,
    "also_reported_by": [
      {
        "outlet": "bioRxiv",
        "title": "Mitochondrial DNA copy number in neurodegenerative diseases: a global meta-analysis of 156 comparisons across 76 studies",
        "url": "https://urgent.news/2026/08/29/mitochondrial-dna-copy-number-in-neurodegenerative-diseases-a-global",
        "published": "2026-08-29T00:00:00.000Z"
      }
    ]
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}