CRTAM+ NK cells endowed with suppressor properties arise in leukemic bone marrow

Journal of Leukocyte Biology
Dalia Ramírez-RamírezRosana Pelayo

Abstract

Due to their increasing rates of morbidity and mortality, childhood malignancies are considered a global health priority, with acute lymphoblastic leukemias (ALLs) showing the highest incidence worldwide. Control of malignant clone emergence and the subsequent normal-leukemic hematopoietic cell out-competition require antitumor monitoring mechanisms. Investigation of cancer surveillance innate cells may be critical to understand the mechanisms contributing in either disease progression or relapse, and to promote displacement of leukemic hematopoiesis by the normal counterpart. We report here that NK cell production is less and low hematopoietic progenitor numbers contribute to this defect. By investigating the expression of the activation molecule class I restricted T-cell associated molecule (CRTAM) along the hematopoietic lineage differentiation pathway, we have identified lymphoid precursor populations coexpressing CD34, CD56/CD3/CD19, and CRTAM as the earliest developmental stage where activation may take place in specialized niches that display the ligand nectin-like-2. Of note, bone marrow (BM) from patients with ALL revealed high contents of preactivated CD56high NK cells expressing CRTAM and endowed with an exhaustion-l...Continue Reading

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Citations

Mar 24, 2021·Current Oncology Reports·Marta Zapata-TarrésRosana Pelayo
Oct 6, 2021·The Journal of Immunology : Official Journal of the American Association of Immunologists·Sinthuja JegatheeswaranSarah Q Crome

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