{
  "id": 2998627,
  "title": "Actin-related ACTL8 localizes to the nucleus and modulates locus-specific transcription through chromatin regulation",
  "url": "https://urgent.news/2026/08/24/actin-related-actl8-localizes-to-the-nucleus-and-modulates-locus",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-24T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.21.746286v1?rss=1"
  },
  "original_language": "en",
  "account": "Actin-related proteins (Arps) are ancient and present in all organisms, but certain Arps, like ACTL8, are exclusive to mammals and express themselves in germ cells. Researchers explored the role of germline-specific Arp ACTL8 in cancer development and discovered a surprising nuclear localization in spermatogonia, testicular cells, as well as breast and lung cancer cells.\n\nIn breast cancer cells, ACTL8 overexpression disrupted normal transcriptional programs, particularly those related to cell migration. Conversely, reducing ACTL8 levels in these cells improved their migration speed. The researchers found that ACTL8 interacts with KDM5B, a protein that removes methyl groups from H3K4, a process that influences gene expression. This interaction between ACTL8 and KDM5B modulates gene transcription, leading to changes in cell migration. Specifically, ACTL8 depletion boosted H3K4me3 at genes involved in migration, suggesting an activation of transcription. These findings reveal ACTL8 as a previously unknown nuclear Arp with a role in regulating gene expression via KDM5B, shedding light on its function in cancer and possibly spermatogenesis.",
  "summary": "Actin-related proteins (Arps) are evolutionarily ancient and broadly expressed, yet some Arps evolved in mammals and acquired germline-specific expression. Here, we investigate the germline-specific Arp \"Actin-like 8\" (ACTL8), which is also misexpressed in multiple cancers with unexplored molecular roles. We show that ACTL8 surprisingly localizes to the nucleus of spermatogonia in human testes…",
  "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."
}