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Updated: Jun 11, 2025

Detection of Human Leukocyte Antigen Biomarkers in Breast Cancer Utilizing Label-free Biosensor Technology
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HLA-G neo-expression modifies genetic programs governing tumor cell lines.

Diana Tronik-Le Roux1,2, Marina Daouya3,4, Isabelle Poras3,4

  • 1CEA Commissariat À L'Énergie Atomique Et Aux Énergies Alternatives/Atomic Energy and Alternative Energies Agency, HIRD Hematology and Immunology Research Division, Saint-Louis Hospital, 1 Avenue Claude Vellefaux, 75010, Paris, France. diana.tronik@gmail.com.

Cancer Immunology, Immunotherapy : CII
|October 2, 2024
PubMed
Summary

Investigating immune checkpoints in kidney cancer revealed Human Leukocyte Antigen-G (HLA-G) alters tumor development, angiogenesis, and mitochondria. This finding offers new therapeutic targets beyond immune response for improved patient outcomes.

Keywords:
Cancer markersHLA-GImmune checkpointsTranscriptome analysisccRCC

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Area of Science:

  • Oncology
  • Immunology
  • Molecular Biology

Background:

  • Immunotherapies show promise for cancer treatment by restoring immune function.
  • Tumor-expressed immune inhibitory molecules (IC) can limit treatment efficacy, leading to poor patient survival.
  • Understanding molecular mechanisms of IC neo-expression is crucial for advancing cancer treatment protocols.

Purpose of the Study:

  • To investigate modifications induced by the neo-expression of immune checkpoint Human Leukocyte Antigen-G (HLA-G) in clear cell renal cell carcinoma (ccRCC) tumor cells.
  • To elucidate the role of HLA-G beyond its known immune functions in tumor evolution.

Main Methods:

  • Analysis of gene expression changes triggered by HLA-G neo-expression in ccRCC.
  • CRISPR/Cas9-mediated gene editing to confirm HLA-G's role in regulating specific gene expression.
  • Investigated pathways included tumor development, angiogenesis, calcium flow, and mitochondria dynamics.

Main Results:

  • HLA-G significantly modifies key genes involved in tumor development, angiogenesis, calcium flow, and mitochondria dynamics.
  • Confirmed the involvement of HLA-G in regulating genes such as ADAM-12, NCAM1, and NRP1 using CRISPR/Cas9.
  • Demonstrated multifaceted roles of HLA-G within tumor cells, extending beyond its established immune functions.

Conclusions:

  • HLA-G plays a significant role in ccRCC tumor cell biology, impacting pathways critical for tumor progression.
  • These findings reveal novel, non-immune functions of HLA-G, suggesting it as a potential therapeutic target.
  • Further research into HLA-G and its interacting partners in various tumors may lead to improved cancer treatments and patient outcomes.