Abstract
Antigen-mediated T-cell proliferation is a transient phenomenon. Like other somatic cells, T lymphocytes generally show replicative senescence in vitro. However, we here show that cytokine-dependent continuous (immortal) T-cell lines can be established from skin biopsy specimens of inflammatory skin diseases. Continuous growth can be obtained by culturing T cells in medium supplemented with interleukin-2 and interleukin-4, but without antigen or antigen-presenting cells added. Loss of the T-cell antigen receptor complex is observed in some of the continuous T-cell lines. Most T-cell lines develop clonal chromosome aberrations during continuous growth. Aberrations for chromosomes 1, 2, 8, 16, and 18 are most commonly observed.
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