Abstract
Sézary syndrome (SS) is a rare form of cutaneous T-cell lymphomas (CTCL) manifested by generalized exfoliative erythroderma, intense pruritus, peripheral lymphadenopathy, and abnormal hyperchromatic mononuclear cells in the skin, lymph nodes, and peripheral blood. Previous studies have revealed complex genetic aberrations affecting almost all chromosomes with up- and down-regulation of several genes in this subtype of CTCL. It is still unclear, however, which of these genetic alterations are the primary changes and which are the secondary ones. We have long thought that a key molecular defect should be consistently present at DNA, RNA, and protein levels. We therefore assume that some chromosome copy number changes (CNC) seen in cancer cells may have a direct impact on gene expression pattern and that these CNC are presumably functional. To test this hypothesis, we designed a simple but novel boinformatic method that included analysis of SS gene expression microarray raw data, generation of gene lists from the chromosomal regions showing significant CNC in SS, and data remaining to establish if the CNC gene lists affected gene clustering in terms of separation of SS cases from the normal controls or not. The bioinformatic analy...Continue Reading
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