Abstract:
:T-cell activation and the subsequent transformation of activated T cells into T-cell blasts require profound changes in cell volume. However, the impact of cell volume regulation for T-cell immunology has not been characterized. Here we studied the role of the cell-volume regulating osmolyte transporter Taut for T-cell activation in Taut-deficient mice. T-cell mediated recall responses were severely impaired in taut(-/-) mice as shown with B16 melanoma rejection and hapten-induced contact hypersensitivity. CD4(+) and CD8(+) T cells were unequivocally located within peripheral lymph nodes of unprimed taut(-/-) mice but significantly decreased in taut(-/-) compared with taut(+/+) mice following in vivo activation. Further analysis revealed that Taut is critical for rescuing T cells from activation-induced cell death in vitro and in vivo as shown with TCR, superantigen, and antigen-specific activation. Consequently, reduction of CD4(+) and CD8(+) T cells in taut(-/-) mice upon antigen challenge resulted in impaired in vivo generation of T-cell memory. These findings disclose for the first time that volume regulation in T cells is an element in the regulation of adaptive immune responses and that the osmolyte transporter Taut is crucial for T-cell survival and T-cell mediated immune reactions.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Kaesler S,Sobiesiak M,Kneilling M,Volz T,Kempf WE,Lang PA,Lang KS,Wieder T,Heller-Stilb B,Warskulat U,Häussinger D,Lang F,Biedermann Tdoi
10.1002/eji.201141690subject
Has Abstractpub_date
2012-04-01 00:00:00pages
831-41issue
4eissn
0014-2980issn
1521-4141journal_volume
42pub_type
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