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Normal human T lymphocytes growing in culture undergo replicative senescence. Previously, we have shown that in our conditions polyclonal T cells cease proliferation after about three weeks (Radziszewska et al., 1999, Cell Biol. Int. 23, 97-103). Now we present results of a more detailed analysis of in vitro growth as well as phenotypic changes of T cells. Cell cycle analysis showed that about 20%...
The study of human disorders known as premature aging syndromes may provide insight into the mechanisms of cellular senescence. The main feature of cellular senescence in vitro is cessation of cell proliferation. Down syndrome (DS) and neuronal ceroid-lypofuscinosis (NCL) are clinically characterized by the premature onset of numerous features normally associated with human aging. Phytohemagglu- tinin...
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