Title |
T Cells Infiltrating Diseased Liver Express Ligands for the NKG2D Stress Surveillance System
|
---|---|
Published in |
The Journal of Immunology, February 2017
|
DOI | 10.4049/jimmunol.1601313 |
Pubmed ID | |
Authors |
Wei-Chen Huang, Nicholas J. Easom, Xin-Zi Tang, Upkar S. Gill, Harsimran Singh, Francis Robertson, Chiwen Chang, John Trowsdale, Brian R. Davidson, William M. Rosenberg, Giuseppe Fusai, Antoine Toubert, Patrick T. Kennedy, Dimitra Peppa, Mala K. Maini |
Abstract |
NK cells, which are highly enriched in the liver, are potent regulators of antiviral T cells and immunopathology in persistent viral infection. We investigated the role of the NKG2D axis in T cell/NK cell interactions in hepatitis B. Activated and hepatitis B virus (HBV)-specific T cells, particularly the CD4 fraction, expressed NKG2D ligands (NKG2DL), which were not found on T cells from healthy controls (p < 0.001). NKG2DL-expressing T cells were strikingly enriched within HBV-infected livers compared with the periphery or to healthy livers (p < 0.001). NKG2D(+)NK cells were also increased and preferentially activated in the HBV-infected liver (p < 0.001), in direct proportion to the percentage of MICA/B-expressing CD4 T cells colocated within freshly isolated liver tissue (p < 0.001). This suggests that NKG2DL induced on T cells within a diseased organ can calibrate NKG2D-dependent activation of local NK cells; furthermore, NKG2D blockade could rescue HBV-specific and MICA/B-expressing T cells from HBV-infected livers. To our knowledge, this is the first ex vivo demonstration that non-virally infected human T cells can express NKG2DL, with implications for stress surveillance by the large number of NKG2D-expressing NK cells sequestered in the liver. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 4 | 36% |
Sweden | 2 | 18% |
United States | 1 | 9% |
Venezuela, Bolivarian Republic of | 1 | 9% |
Unknown | 3 | 27% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 8 | 73% |
Scientists | 1 | 9% |
Practitioners (doctors, other healthcare professionals) | 1 | 9% |
Science communicators (journalists, bloggers, editors) | 1 | 9% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Japan | 1 | 2% |
United Kingdom | 1 | 2% |
Unknown | 47 | 96% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 12 | 24% |
Researcher | 8 | 16% |
Student > Bachelor | 5 | 10% |
Other | 4 | 8% |
Professor | 3 | 6% |
Other | 9 | 18% |
Unknown | 8 | 16% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 13 | 27% |
Immunology and Microbiology | 13 | 27% |
Biochemistry, Genetics and Molecular Biology | 7 | 14% |
Agricultural and Biological Sciences | 3 | 6% |
Veterinary Science and Veterinary Medicine | 1 | 2% |
Other | 3 | 6% |
Unknown | 9 | 18% |