{
  "id": 495234,
  "title": "OTUB1 controls marginal zone B-cell development by stabilizing RelA in a CD40-dependent manner",
  "url": "https://urgent.news/2026/08/10/otub1-controls-marginal-zone-b-cell-development-by-stabilizing-rela",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-08-10T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.06.743158v1?rss=1"
  },
  "original_language": "en",
  "account": "The study of OTUB1, a deubiquitinase involved in immune regulation, has revealed its crucial role in controlling marginal zone B-cell development. This process is tightly linked to NF-kappaB signaling, which is essential for B-cell homeostasis and fate decisions. By examining B cell-specific OTUB1-deficient mice, researchers discovered that its absence leads to an expansion of marginal zone B cells and their precursor populations in the spleen. These cells exhibit an activated phenotype and enhanced proliferative responses, particularly when stimulated by CD40. The study further shows that OTUB1 deficiency alters CD40-induced NF-kappaB signaling. This is characterized by increased degradation of IkappaB and enhanced nuclear accumulation of p50-containing NF-kappaB complexes, despite reduced stability of RelA, a key transcription factor. Through mechanisms involving RelA interaction with OTUB1, the protein restricts its lysine-48-linked ubiquitination and subsequent proteasomal degradation. Consequently, OTUB1 acts as a stabilizer for RelA, playing an additional role in the ubiquitin-dependent control of NF-kappaB signaling. This discovery highlights RelA as a novel target of OTUB1 and introduces a new layer to the regulatory mechanisms governing splenic B-cell homeostasis and marginal zone B-cell development.",
  "summary": "Ubiquitin-dependent regulation of NF-kappaB signaling is essential for B-cell homeostasis and fate decisions, yet the contribution of specific deubiquitinating enzymes remains incompletely defined. OTUB1, a lysine-48-specific deubiquitinase, has been broadly implicated in immune regulation, including control of NF-kappa;B signaling and prevention of immune hyperactivation. Previous studies have…",
  "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."
}