Abstract:
:Although the T cell costimulatory molecules CD2 and CD28 are enriched within the immunological synapse (IS), it has been suggested that costimulatory molecules need not be localized to the contact site between a T cell and an antigen-presenting cell (APC) in order to costimulate T cell activation. To determine whether CD2 or CD28 engagement outside of the IS is sufficient to costimulate T cell activation, we compared mouse T cell responses to anti-CD3 and anti-CD2 monoclonal antibodies (mAbs) or anti-CD3 and anti-CD28 mAbs immobilized on the same, i.e., in cis, or on different, i.e., in trans, 10 micron polystyrene microspheres. In comparison to T cells that were stimulated with co-immobilized anti-CD3 and anti-CD2 or anti-CD28 mAbs, DNA synthesis, interleukin (IL)-2 production, and cellular proliferation were all severely impaired following T cell stimulation with anti-CD3 and anti-CD2 mAbs or anti-CD3 and anti-CD28 mAbs on different microspheres. Deficient cellular proliferation and IL-2 synthesis by T cells that experienced CD3 and CD2 or CD28 cross-linking in trans provides evidence that costimulatory molecules must function in the context of the IS for optimal T cell activation.
journal_name
Immunol Investjournal_title
Immunological investigationsauthors
Watson CL,Furlong SJ,Hoskin DWdoi
10.1080/08820130701555035subject
Has Abstractpub_date
2008-01-01 00:00:00pages
63-78issue
1eissn
0882-0139issn
1532-4311pii
789925275journal_volume
37pub_type
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