2. MATERIALS AND METHODS
2.5. Blood and tissue samples
Samples representing cell populations were obtained from our collaborators:
Natural Immunity Group (University Clinic of Düsseldorf, Germany) and Faculty of Medicine (University of Southampton, UK).
Taking blood and tissue samples with subsequent cell isolation was conducted with the approval of ethical authorities. Sample collection in the University Clinic of Düsseldorf was approved by the ethical committee of the Heinrich Heine University Düsseldorf (study numbers 3756, 3240, 3880, and 4723); blood and bone marrow samples were obtained from healthy donors, while tonsils were resected due to medical recommendations. Liver sample collection was approved by the National Research Ethics Service (reference number 13/WA/0329).
In all cases cells were isolated by density gradient centrifugation using Ficoll medium and specific lymphocyte subpopulations were selected by fluorescence-activated cell sorting (FACS) based on known surface markers. Details about origin and sorting strategy of cell populations are summarized in Table 1.
The analyzed sample set included human NK cells (n=57), T lymphocytes (n=17), B lymphocytes (n=2), monocytes (n=2), and CD34+ lymphocyte precursors isolated from peripheral blood, umbilical cord blood, bone marrow, tonsils, and liver. Besides this, NK cells from two independent in vitro differentiation assays were analyzed (n=9). These NK cells were generated from bone marrow-derived CD34+ progenitors by induction with the combination of cytokines including IL-2, IL-3, IL-6, IL-7, IL-12, IL-15, IL-18, and trombopoetin. The differentiation assays were performed by the Natural Immunity Group (University Clinic of Düsseldorf).
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Table 1 Characteristic of studied lymphocyte populations
Name Source Cell
Type Phenotype Specific
characteristic
pbNKst4_1 Peripheral blood NK CD56brightCD16- Stage 4
pbNKst4_2 Peripheral blood NK CD56brightCD16+ Stage 4
pbNKst5_1 Peripheral blood NK CD56dimKIR2DL3+ Stage 5
cbNKst4 Cord blood NK CD56bright Stage 4
pbNKst5_2 Peripheral blood NK KIR-NKG2A-CD56+CD3- Stage 5
pbNKst5_3 Peripheral blood NK KIR-NKG2A-CD56+CD3- Stage 5
pbNKst5lic_1 Peripheral blood NK KIR3DL1-NKG2A-KIR2DL1 -KIR2DL3+CD56+CD3-
Stage 5 licensed pbNKst5lic_2 Peripheral blood NK KIR3DL1-NKG2A
-KIR2DL1+KIR2DL3-CD56+CD3-
Stage 5 licensed
cbNKst5 Cord blood NK CD56dimKIR2DL3+ Stage 5
cbCD34pos_1 Cord blood CD34 CD34+CD38+ Lymphocyte
precursors
cbCD34pos_2 Cord blood CD34 CD34+CD38+ Lymphocyte
precursors
cbTCD4pos_1 Cord blood T CD4+ T lymphocytes
cbTCD4pos_2 Cord blood T CD4+ T lymphocytes
cbTCD8pos_1 Cord blood T CD8+ T lymphocytes
cbTCD8pos_2 Cord blood T CD8+ T lymphocytes
pbNKst5lic_3 Peripheral blood NK KIR2DL3+KIR2DL1+ KIR3DL1+
Stage 5 licensed
cbCD34_1 Cord blood CD34 CD34+ Cultured without
feeder layer
cbCD34_2 Cord blood CD34 CD34+ Cultured with
feeder layer
pbNKst5lic_4 Peripheral blood NK KIR2DL1+ Stage 5 licensed
pbNKst5lic_5 Peripheral blood NK KIR2DL3+ Stage 5 licensed
pbNKst5lic_6 Peripheral blood NK KIR2DL3+ Stage 5 licensed
pbNKst5lic_7 Peripheral blood NK KIR2DL1+ Stage 5
daNKst2_1 Differentiation
assay
NK CD34+CD117+CD56-CD94- Stage 2
daNKst3_1 Differentiation
assay
NK CD34+CD117+CD56+CD94- Stage 3
daNKst4_1 Differentiation
assay
NK CD34-CD117
-CD56+CD94+CD62L+/ CD117brightCD56+CD94-KIR
-Stage 4
daNKst5_1 Differentiation
assay
NK CD117dimCD56+CD94+ KIR+
Stage 5
pbTKIRpos_1 Peripheral blood T CD4+KIR2DL2+ KIR-positive
pbTKIRpos_2 Peripheral blood T CD4+KIR3DL2+ KIR-positive
pbTKIRneg_1 Peripheral blood T CD4+KIR- KIR-negative
daNKst4_2 Differentiation
assay
NK CD117brightCD56+CD94+ CD62L+/CD117brightCD56+ CD94-KIR
-Stage 4
daNKst2_2 Differentiation
assay
NK CD34+CD3-CD94-CD117+CD56- Stage 2 day 7
daNKst3_2 Differentiation
assay
NK CD34-CD117+CD56+CD94 -NKG2Adim
Stage 3 day 11
daNKst3_3 Differentiation
assay
NK CD94-CD117+CD56+NKG2A -KIR
-Stage 3 day 25
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daNKst4_3 Differentiation
assay
NK CD94+CD117 -CD56+NKG2A+KIR
-Stage 4 day 25
daNKst5_2 Differentiation
assay
NK CD94+CD117 -CD56+NKG2A+KIR+
Stage 5 day 25
pbTCKIRneg_2 Peripheral blood T CD4+KIR- KIR-negative
pbTKIRpos_4 Peripheral blood T CD4-KIR3DL2+ KIR-positive
pbTKIRpos_5 Peripheral blood T CD4+KIR3DL2+ KIR-positive
stimulated pbTKIRpos_6 Peripheral blood T CD4+KIR3DL2+ CD3/CD28 KIR-positive
stimulated
pbTKIRneg_3 Peripheral blood T CD8+KIR- KIR-negative
pbTKIRpos_7 Peripheral blood T CD8+KIR3DL2+ KIR-positiv
pbNKst5mem_1 Peripheral blood NK CD56dimNKG2A-CD57 -KIR2DL1+NKG2C+CD3-
Stage 5 memory-like
pbNKst5mem_2 Peripheral blood NK CD56dimNKG2A
+/-CD57+KIR2DL1+NKG2C-CD3-
Stage 5 memory-like
pbNKst5mem_3 Peripheral blood NK CD56dimNKG2A
-CD57+KIR2DL1+NKG2C+CD3-
Stage 5 memory-like
pbNKst5lic_8 Peripheral blood NK CD56dimNKG2A-CD57 -KIR2DL1+NKG2C-CD3-
Stage 5 licensed pbNKst5lic_9 Peripheral blood NK CD56dimNKG2A+KIR2DL1
-KIR2DL3-KIR3DL1-CD3-
Stage 5 licensed pbNKst5nonl_2 Peripheral blood NK CD56dimNKG2A
-KIR2DL1+KIR2DL3-KIR3DL1 -CD3-
Stage 5 nonlicensed
pbNKst5lic_10 Peripheral blood NK CD56dimNKG2A- KIR2DL1
-KIR2DL3+KIR3DL1-CD3
-Stage 5 licensed
pbNKst4_3 Peripheral blood NK CD56bright Stage 4
pbNKst5nonl_3 Peripheral blood NK CD56dimNKG2A-KIR2DL1 -KIR2DL3-KIR3DL1-CD3-
Stage 5 nonlicensed
cbB Cord blood B CD19+ B lymphocytes
pbTKIRneg_4 Peripheral blood T CD4+KIR+ Stimulated
pbTKIRneg_5 Peripheral blood T CD4+KIR+ CD3/CD28 KIR-positive
pbNKst5mem_4 Peripheral blood NK CD56dimCD3
-CD57+KIR2DL3+NKG2C -NKG2A-KIR2DL1-
Stage 5 memory-like pbNKst5mem_5 Peripheral blood NK CD56dimCD3-CD57
-KIR2DL3+NKG2C+NKG2A -KIR2DL1
-Stage 5 memory-like pbNKst5lic_12 Peripheral blood NK CD56dimCD3-CD57
-KIR2DL3+NKG2C-NKG2A -KIR2DL1-
Stage 5 licensed
pbNKst5mem_6 Peripheral blood NK CD56dimCD3
-CD57+KIR2DL3+NKG2C+NKG2 A-KIR2DL1-
Stage 5 memory-like pbNKst5nonl_4 Peripheral blood NK CD56dimCD3-CD57-KIR2DL3
-NKG2C-NKG2A-KIR2DL1+
Stage 5 nonlicensed bmNKst1_1 Bone marrow NK CD34+CD117-CD56-CD94-CD3
-CD14-CD19
-Stage 1
bmNKst2_1 Bone marrow NK CD34+CD117+CD56-CD94-CD3
-CD14-CD19
-Stage 2
bmNKst3_1 Bone marrow NK CD34+CD117+CD56-CD94-CD3
-CD14-CD19
-Stage 3
bmNKst4_1 Bone marrow NK CD117-CD34
-CD56brightCD94+CD3-CD14 -CD19
-Stage 4
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bmNKst5_1 Bone marrow NK CD117-CD34
-CD56dimCD94+CD3-CD14-CD19
-Stage 5
cbNKst2 Cord blood NK CD3-CD14-CD19-CD117+CD34+ Stage 2
cbNKst3 Cord blood NK CD3-CD14-CD19-CD117+CD34
-CD56-CD94
-Stage 3
cbNKst4_2 Cord blood NK CD3-CD14-CD19
-CD56brightCD94+
Stage 4
cbNKst5_2 Cord blood NK CD3-CD14-CD19-CD117-CD34
-CD56dimCD94+
Stage 5
toNKst3_1 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56+/-CD94
-Stage 3
toNKst4_1 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56brightCD94+
Stage 4
liNKCXCR6n_1 Liver NK CD56dimCXCR6- CXCR-negative
liNKCXCR6n_2 Liver NK CD56dimCXCR6- CXCR-negative
liNKCXCR6p Liver NK CD56dimCXCR6+ CXCR-positive
bmNKst1_2 Bone marrow NK CD3-CD14-CD19-CD117-CD34+ Stage 1 bmNKst2_3 Bone marrow NK CD3-CD14-CD19-CD117+CD34+ Stage 2 bmNKst3_2 Bone marrow NK CD3-CD14-CD19-CD117+CD34+ Stage 3
bmNKst4_2 Bone marrow NK CD3-CD14-CD19
-CD56brightCD94+
Stage 4 bmNKst5_2 Bone marrow NK CD3-CD14-CD19-CD56dimCD94+ Stage 5
toNKst2 Tonsils NK CD3-CD14-CD19-CD117+CD34+ Stage 2
toNKst3_2 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56+/-CD94
-Stage 3
toNKst4_2 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56brightCD94+
Stage 4
toNKst5 Tonsils NK CD3-CD14-CD19-CD117-CD34
-CD56dimCD94+
Stage 5
toNKst3a Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56-CD94
-Stage 3a
toNKst3b Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56+CD94
-Stage 3b
toNKst3_4 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56-CD94-NKp44+
Stage 3
NKp44-positive
toNKst3_5 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56+CD94-NKp44+
Stage 3
NKp44-positive
toNKst3_6 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56+CD94-NKp44
-Stage 3
toNKst3_7 Tonsils NK CD3-CD14-CD19-CD117+CD34
-CD56-CD94-NKp44
-Stage 4
pbB Peripheral blood B CD19+ B lymphocytes
cbMono Cord blood MC CD14+ Monocytes
pbMono Peripheral blood MC CD14+ Monocytes
pbNKst5lic_11 Peripheral blood NKs NKG2A+CD56dim Stage 5
licensed