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<p>Many inhibitory receptors that regulate immune cell function recognize a limited number of specific ligands. However, a subgroup of so-called inhibitory pattern recognition receptors (iPRRs) can bind a much larger array of ligands of structural similarity. Leukocyte-associated immunoglobulin-like receptor 1 (LAIR1) is one such iPRR that is expressed by most immune cells and recognizes a common structural pattern present in collagens and collagen domain-containing proteins. LAIR1 signalling regulates diverse immune cell populations and is currently the focus of multiple clinical trials for the treatment of cancer. We here review the current literature on LAIR1, as a prototypic example of how inhibitory PRRs contribute to immune balance and of how these receptors are regulated. We discuss the function of LAIR1 in homeostasis, infection, inflammation and cancer, and consider the advantages and potential pitfalls of targeting this receptor in human disease.</p>

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Inhibitory pattern recognition receptors: lessons from LAIR1

  • 期刊论文

  • 发表日期：

    2025年5月27日

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  • M. Inês Pascoal Ramos,
  • Michiel van der Vlist,
  • Linde Meyaard

摘要

Many inhibitory receptors that regulate immune cell function recognize a limited number of specific ligands. However, a subgroup of so-called inhibitory pattern recognition receptors (iPRRs) can bind a much larger array of ligands of structural similarity. Leukocyte-associated immunoglobulin-like receptor 1 (LAIR1) is one such iPRR that is expressed by most immune cells and recognizes a common structural pattern present in collagens and collagen domain-containing proteins. LAIR1 signalling regulates diverse immune cell populations and is currently the focus of multiple clinical trials for the treatment of cancer. We here review the current literature on LAIR1, as a prototypic example of how inhibitory PRRs contribute to immune balance and of how these receptors are regulated. We discuss the function of LAIR1 in homeostasis, infection, inflammation and cancer, and consider the advantages and potential pitfalls of targeting this receptor in human disease.