{
  "id": 6225485,
  "title": "Environment-driven active transport of influenza A virus",
  "url": "https://urgent.news/2026/09/07/environment-driven-active-transport-of-influenza-a-virus",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-09-07T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.03.749308v1?rss=1"
  },
  "original_language": "en",
  "account": "Influenza A virus (IAV) breaks traditional views of particles as passive diffusers or those powered by internal engines. Instead, researchers demonstrate that IAV actively navigates its surroundings through environmental manipulation, creating memory and directional cues in two and three dimensions. This process hinges on IAV's envelope proteins, hemagglutinin (HA) and neuraminidase (NA), which bind and cleave sialylated glycan receptors.\n\nBy examining the interplay between HA, NA, and receptor binding/cleavage, the study integrates theoretical models, simulations, and single-virus tracking to reveal the relationship between these interactions and macroscopic transport. As HA cleaves receptors, it dissipates chemical free energy, influencing the likelihood of re-bonding to the altered landscape while leaving a trail that shapes future interactions.\n\nIn landscapes with varied receptor densities, multivalent binding between HA and receptors directs motion towards regions with higher receptor concentration, while NA-mediated receptor destruction amplifies this tendency by enhancing the contrast experienced by HA. To validate their findings, researchers conducted experiments on artificial glycan membranes, confirming that IAV steps are indeed biased along local receptor gradients.\n\nThe implications of this research extend beyond understanding IAV's movement. The theory suggests that the variability exhibited by virions can distribute transport functions within a population, acting as a physical safeguard against complex receptor environments. Ultimately, this study establishes environment-driven active matter as a mechanism enabling motorless transport, powered and guided by the chemical modification of the surroundings.",
  "summary": "Biological media such as airway mucus and extracellular matrix are usually viewed as transport barriers that particles cross by passive diffusion or with internal engines. We show instead that a particle can move actively by modifying the landscape it traverses, creating environmental memory and directional cues in two and three dimensions. Influenza A virus (IAV) realizes this principle through…",
  "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."
}