{
  "id": 8332804,
  "title": "Spatially resolved multimodal hallmarks of response to neoadjuvant immunotherapies in the melanoma ecosystem in 2D and 3D",
  "url": "https://urgent.news/2026/09/18/spatially-resolved-multimodal-hallmarks-of-response-to-neoadjuvant",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-18T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.12.751186v1?rss=1"
  },
  "original_language": "en",
  "account": "Neoadjuvant immunotherapy has revolutionized cancer treatment, yet the spatial molecular landscape driving response and resistance across various immune checkpoint blockade (ICB) regimens remains elusive. A collaborative effort has compiled the most extensive neoadjuvant ICB spatial multi-omics dataset to date, analyzing over 112 million cells at the single-cell level across three distinct melanoma ICB regimens using advanced MERFISH spatial transcriptomics, multiplexed immunofluorescence, and scRNA-sequencing techniques. This comprehensive study unveiled the intricate multicellular architecture of the neoadjuvant tumor microenvironment, encompassing mature tumor-infiltrating lymphocytes (TILs) with germinal centers, TCF7+ stem-like T cells, myeloid cells organized into spatially distinct cellular neighborhoods with unique intercellular signaling circuits, and CCL19/CCL21-expressing fibroblasts acting as a novel stromal scaffold sustaining these immune hubs. To facilitate this extensive analysis, researchers developed three specialized computational tools that, for the first time, enabled comprehensive quantification of this complex microenvironment: SCIRA for whole-slide single-cell receptor-ligand quantification, GCSCAN for molecularly grounded TIL and germinal center structural delineation, and PathNet-TLS for automated TIL detection on H&E images. By applying these tools across the entire cohort, the research team successfully distinguished the immune and stromal composition and cellular neighborhood organization that differentiates responders from non-responders. Additionally, they quantified cell-cell interactions and regimen-specific immune architectures, revealing a significantly stronger mature TIL/germinal center response in the IPI-NIVO regimen compared to NIVO-RELA. Crucially, GCSCAN-derived TIL and germinal center density each significantly stratified disease-free survival, with non-responders lacking germinal centers displaying an elevated risk of relapse. Employing open-top light-sheet imaging and CODA-based 3D reconstruction, the study uncovered interconnected germinal center-TIL tunnels invisible to conventional 2D histopathology. These groundbreaking findings establish a novel discovery-to-tool paradigm that links single-cell tumor microenvironment interrogation to clinically deployable computational pathology, paving the way for biomarker-driven neoadjuvant ICB assessment across various cancer types.",
  "summary": "Neoadjuvant immunotherapy has transformed cancer treatment, yet the spatial molecular architecture governing response and resistance across distinct immune checkpoint blockade (ICB) regimens remains poorly defined. We assembled the largest neoadjuvant ICB (NICB) spatial multi-omics cohort to date, profiling over 112 million cells at single-cell resolution across three melanoma ICB regimens using…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "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."
}