Abstract:
:Human CD63 has been reported to play a role either as an inhibitor or as a co-stimulator of T- cell responses, although the mechanism of this is unclear. In this study, an anti-human CD63 monoclonal antibody (mAb) COS3A was used to monitor the role of CD63 in T-cell activation. MAb COS3A could inhibit CD3-mediated T-cell proliferation and CD25 expression in peripheral blood mononuclear cells (PBMCs), used as a study model, but the suppressive effect was not observed when purified T-cells were used instead of PBMCs. The inhibitory phenomenon was associated with downregulation of IL-2 and IFN-γ by T-cells, but upregulation of IL-10 by monocytes. Neutralizing IL-10 with anti-IL-10 mAb improved the T-cell response, indicating the role of IL-10 in T-cell suppression. In this study, monocytes were demonstrated to play a role in impeding T-cell activation by the anti-CD63 mAb COS3A. This is the first evidence that anti-CD63 mAb induces IL-10 secretion by monocytes, which later play a role in T-cell hypo-responsiveness.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Wansook S,Mahasongkram K,Chruekamlow N,Pata S,Kasinrerk W,Khunkaewla Pdoi
10.1016/j.molimm.2019.09.005subject
Has Abstractpub_date
2019-10-01 00:00:00pages
591-599eissn
0161-5890issn
1872-9142pii
S0161-5890(19)30300-1journal_volume
114pub_type
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