Abstract:
:The effector potential of NK cells is counterbalanced by their sensitivity to inhibition by "self" MHC class I molecules in a process called "education." In humans, interactions between inhibitory killer immunoglobulin-like receptors (KIR) and human MHC (HLA) mediate NK cell education. In HLA-B(∗)27:05(+) transgenic mice and in patients undergoing HLA-mismatched hematopoietic cell transplantation (HCT), NK cells derived from human CD34(+) stem cells were educated by HLA from both donor hematopoietic cells and host stromal cells. Furthermore, mature human KIR3DL1(+) NK cells gained reactivity after adoptive transfer to HLA-B(∗)27:05(+) mice or bone marrow chimeric mice where HLA-B(∗)27:05 was restricted to either the hematopoietic or stromal compartment. Silencing of HLA in primary NK cells diminished NK cell reactivity, while acquisition of HLA from neighboring cells increased NK cell reactivity. Altogether, these findings reveal roles for cell-extrinsic HLA in driving NK cell reactivity upward, and cell-intrinsic HLA in maintaining NK cell education.
journal_name
Immunityjournal_title
Immunityauthors
Boudreau JE,Liu XR,Zhao Z,Zhang A,Shultz LD,Greiner DL,Dupont B,Hsu KCdoi
10.1016/j.immuni.2016.07.005subject
Has Abstractpub_date
2016-08-16 00:00:00pages
280-91issue
2eissn
1074-7613issn
1097-4180pii
S1074-7613(16)30257-6journal_volume
45pub_type
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