{
  "id": 14087550,
  "title": "A simple platform for in situ DNA-PAINT optimization enables improved multiplexed super-resolution imaging in Gram-negative bacteria",
  "url": "https://urgent.news/2026/10/12/a-simple-platform-for-in-situ-dna-paint-optimization-enables-improved",
  "topic": "science",
  "section": "Science",
  "published": "2026-10-12T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.10.11.758320v1?rss=1"
  },
  "original_language": "en",
  "account": "A streamlined platform for optimizing DNA-PAINT in situ facilitates enhanced multiplexed super-resolution imaging of Gram-negative bacteria. This innovation stems from the identification of obstacles hindering the widespread application of DNA-PAINT in nanoscale bacteriology. The primary challenge lies in the absence of user-friendly protocols and systematic evaluation of imager-docking strand pairs within the complex environments of bacterial cells. To address this, researchers developed a screening platform employing RNA-FISH, which incorporated customizable docking sequences onto the 16S rRNA-directed EUB338 probe. This approach enabled rigorous assessment of imager-docking pairs directly inside living Escherichia coli cells, with a focus on critical parameters like specificity, binding kinetics, and localization precision. Through extensive screening of 12 DNA-PAINT sequences, the team identified an optimized set for conducting four-target 3D Exchange-PAINT in individual E. coli cells. Furthermore, this strategy was successfully applied to visualize three effector mRNAs within the Gram-negative pathogen Yersinia enterocolitica, yielding detailed insights into the spatial arrangement and clustering of these molecules. The presented framework and practical guidelines for high-quality 3D DNA-PAINT imaging in Gram-negative bacteria are expected to catalyze the broader adoption of this technique in nanoscale bacteriology research.",
  "summary": "DNA-PAINT enables super-resolution imaging with high multiplexing capacity, yet it is rarely used in nanoscale bacteriology. A likely reason is the lack of straightforward protocols and of systematic characterization of imager-docking strand pairs inside intact bacterial cells, whose envelope and dense cytoplasm differ markedly from both the DNA origami in vitro systems used to develop them, and…",
  "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."
}