{
  "id": 2256140,
  "title": "Leukocyte Immunoglobulin-Like Receptor B1 and its Interactions with Human Leukocyte Antigens",
  "url": "https://urgent.news/2026/08/20/leukocyte-immunoglobulin-like-receptor-b1-and-its-interactions-with",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-20T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.16.745109v1?rss=1"
  },
  "original_language": "en",
  "account": "Human Leukocyte Antigen (HLA) molecules interact with their corresponding immunoreceptors, such as Leukocyte Immunoglobulin-like Receptors (LILRs), to regulate innate and adaptive immune cell functions. LILRs, expressed across various immune cell types, can modulate immune activation and tolerance. Among the LILRs, LILRB1, which primarily binds to the conserved 3 and β2-microglobulin components of HLA molecules, is recognized as a broad regulator of pan-HLA class I-mediated functions. However, conflicting data has been observed regarding the breadth of LILRB1-HLA-I interactions. Some direct affinity studies on a limited number of HLA-I molecules have shown no significant differences in LILRB1 binding, while broader analyses using single-antigen bead arrays suggest underlying variability. This study aimed to investigate the differential preferences of LILRB1 across HLA-I allotypes. Through a broad binding assay, the research found that, although LILRB1 is a broad HLA-I-binding receptor, it exhibits differential preferences among HLA-I allotypes. By examining the HLA-I-LILRB1 interface through molecular dynamics analyses, the study determined that HLA-3 domain dynamism underlies these binding differences. The crystalline structure of LILRB1 was also determined, which provided insights into the intrinsic structural flexibility within its domains. These structural insights were then utilized to refine the understanding of the binding modalities of therapeutic monoclonal antibodies currently used in various immunotherapeutic applications. The findings of this study establish structural and mechanistic bases for the differential HLA-I recognition by LILRB1, providing valuable insights into the targeting of LILRB1 in immunotherapies related to transplantation, chronic infection, and cancer.",
  "summary": "Interactions between Human Leukocyte Antigen (HLA) molecules and their cognate immunoreceptors are essential for regulating innate and adaptive immune cell functions. Leukocyte Immunoglobulin-like Receptors (LILRs) are key regulators of HLA-mediated immune responses, owing to their broad expression across immune cell populations and their ability to modulate both immune activation and tolerance.…",
  "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."
}