Article Dans Une Revue Science Immunology Année : 2025

Uptake of lipids from ascites drives NK cell metabolic dysfunction in ovarian cancer

Karen Slattery
Cong-Hui Yao
Eimear Mylod
  • Fonction : Auteur
John Scanlan
Barry Scott
Joseph Patrick Crowley
  • Fonction : Auteur
Orla Mcgowan
  • Fonction : Auteur
Gavin Mcmanus
  • Fonction : Auteur
Martin Brennan
  • Fonction : Auteur
Katie O’brien
Kate Glennon
Edward Corry
  • Fonction : Auteur
Ann Treacy
  • Fonction : Auteur
Clair Gardiner
Marcia C Haigis
Donal J Brennan
Lydia Lynch
  • Fonction : Auteur
  • PersonId : 1624037

Résumé

High-grade serous ovarian cancer (HGSOC) remains an urgent unmet clinical need, with more than 70% of patients presenting with metastatic disease. Many patients develop large volumes of ascites, which promotes metastasis and is associated with poor therapeutic response and survival. Immunotherapy trials have shown limited success, highlighting the need to better understand HGSOC immunology. Here, we analyzed cytotoxic lymphocytes [natural killer (NK), T, and innate T cells] from patients with HGSOC and observed widespread dysfunction across primary and metastatic sites. Although nutrient rich, ascites was immunosuppressive for all lymphocyte subsets. NK cell dysfunction was driven by uptake of polar lipids, with associated dysregulation in lipid storage. Phosphatidylcholine was a key immunosuppressive metabolite, disrupting NK cell membrane order and cytotoxicity. Blocking lipid uptake through SR-B1 protected NK cell antitumor functions in ascites. These findings offer insights into immune suppression in HGSOC and have important implications for the design of future immunotherapies.

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hal-05417026 , version 1 (15-12-2025)

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Karen Slattery, Cong-Hui Yao, Eimear Mylod, John Scanlan, Barry Scott, et al.. Uptake of lipids from ascites drives NK cell metabolic dysfunction in ovarian cancer. Science Immunology, 2025, 10 (107), pp.eadr4795. ⟨10.1126/sciimmunol.adr4795⟩. ⟨hal-05417026⟩
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