Type

Journal Article

Authors

Cliona O'Farrelly
Justin Geoghegan
Diarmaid D Houlihan
Sarah Whelan
Ronan Fahey
Mark W Robinson
Cathal Harmon

Subjects

Biochemistry

Topics
t cells liver cells blood cells transcription factors killer cells natural liver transplantation adult human human cells

Tissue-resident Eomes(hi) T-bet(lo) CD56(bright) NK cells with reduced proinflammatory potential are enriched in the adult human liver (2016)

Abstract The adult human liver is enriched with natural killer (NK) cells, accounting for 30–50% of hepatic lymphocytes, which include tissue-resident hepatic NK-cell subpopulations, distinct from peripheral blood NK cells. In murine liver, a subset of liver-resident hepatic NK cells have altered expression of the two highly related T-box transcription factors, T-bet and eomesodermin (Eomes). Here, we investigate the heterogeneity of T-bet and Eomes expression in NK cells from healthy adult human liver with a view to identifying human liver-residentpopulations.HepaticNKcellswereisolatedfromdonorliverperfusatesand biopsies obtained during orthotopic liver transplantation (N = 28). Hepatic CD56bright NK cells were Eomeshi T-betlo, a phenotype virtually absent from peripheral blood. These NK cells express the chemokine receptor CXCR6 (chemokine (C-X-C motif) receptor 6), a marker of tissue residency, which is absent from hepatic CD56dim and blood NK cells. Compared to blood populations, these hepatic CD56bright NK cells have increased expression of activatory receptors (NKp44, NKp46, and NKG2D). They show reduced ability to produce IFN-γ but enhanced degranulation in response to challenge with target cells. This functionally distinct population of hepatic NK cells constitutes 20–30% of the total hepatic lymphocyte repertoire and represents a tissue-resident immune cell population adapted to the tolerogenic liver microenvironment.
Collections Ireland -> Maynooth University -> Academic Unit = Faculty of Science and Engineering: Biology
Ireland -> Maynooth University -> Type = Article
Ireland -> Maynooth University -> Status = Published

Full list of authors on original publication

Cliona O'Farrelly, Justin Geoghegan, Diarmaid D Houlihan, Sarah Whelan, Ronan Fahey, Mark W Robinson, Cathal Harmon

Experts in our system

1
Cliona O'Farrelly
Trinity College Dublin
Total Publications: 147
 
2
Justin Geoghegan
Trinity College Dublin
Total Publications: 14
 
3
Diarmaid D Houlihan
Maynooth University
Total Publications: 3
 
4
Sarah Whelan
Trinity College Dublin
Total Publications: 3
 
5
Ronan Fahey
Trinity College Dublin
Total Publications: 5
 
6
Mark W Robinson
Trinity College Dublin
Total Publications: 15
 
7
Cathal Harmon
Trinity College Dublin
Total Publications: 9