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Table 1 Expression levels of immune cell-related markers measured in human MuStem cells

From: Human MuStem cells repress T-cell proliferation and cytotoxicity through both paracrine and contact-dependent pathways

Cell surface markers

Unstimulated hMuStem cells

TNF-α/IFN-γ-stimulated hMuStem cells

Positive cells (%)

rMFI

Positive cells (%)

rMFI

Human leukocyte antigen

HLA-ABC

100%

13.3 ± 7.3

100%

21.2 ± 10.3

HLA-DP

29.2% ± 23.9%

9.7 ± 4.8

88.3% ± 23.5%

19.6 ± 10.5

HLA-E

0%

NA

100%

4.0 ± 1.1

Immune-checkpoint ligands

Co-inhibitory factors

PDL-1

0%

NA

100%

4.0 ± 1.3

PDL-2

100%

2.3 ± 0.3

100%

3.7 ± 1.1

Other factors

CD155

100%

12.0 ± 2.9

100%

14.0 ± 3.6

Adhesion molecules involved in T-cell interaction

ICAM-1

37.4% ± 11.2%

10.4 ± 6.0

100%

284.5 ± 124.8

VCAM-1

8.3% ± 4.0%

6.0 ± 3.7

100%

5.6 ± 3.2

  1. Flow cytometry comparison of human leukocyte antigen (HLA) molecules, immune-checkpoint ligands and adhesion molecules involved in T-cell interaction in hMuStem cells cultured in basal (unstimulated) or pro-inflammatory (TNF-α/IFN-γ-stimulation) conditions. Data are presented as the mean ± SEM (n = 5, independent batches) percentage of positive events for each marker and the relative mean fluorescence intensity (rMFI). NA, not applicable