{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T07:05:59Z","timestamp":1789369559732,"version":"build-2803163510"},"reference-count":24,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2004,8,11]],"date-time":"2004-08-11T00:00:00Z","timestamp":1092182400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Genes Chromosomes &amp; Cancer"],"published-print":{"date-parts":[[2004,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The functional consequences of a high\u2010hyperdiploid karyotype, found in up to one\u2010third of cases of acute lymphoblastic leukemia (ALL), are unknown. Using the technique of comparative expressed sequence hybridization (CESH), we sought to address the question of whether increased chromosome copies in hyperdiploid ALL lead to increased gene expression. Relative expression of hyperdiploid ALL blasts versus peripheral blood mononuclear cells was analyzed in 18 patients. Common regions of overexpression corresponding to the presence of tri\u2010\/tetrasomies included: Xp22.1\u201322.2, 4q28, 6q14\u201315, 6q24, 10p13, 14q23\u201324, 17q21, 18q12, and 21q21, identified in 28\u201389% of cases. However, increased expression without underlying trisomy occurred at 3p21.3, 7q11.2, 8p21, and 8q24.1 in 39\u201390% of cases. High expression at 7q11.2, the most consistent change detected, was confirmed by quantitative PCR. Poor correlation between the presence of tri\u2010\/tetrasomy and overexpression was observed for chromosomes 14 and 17. Two cases were reanalyzed versus (i) B cells, (ii) transformed B cells, and (iii) CD34+19+ cells (the putative counterpart of the leukemic cell). A reduction in the number of relatively overexpressed regions was observed with CD34+19+ cells. In particular, the peak at 7q11.2 disappeared, suggesting up\u2010regulation of genes from this region in the early ontology of normal B\u2010cell development. In conclusion, we have shown that tri\u2010\/tetrasomies in hyperdiploid ALL lead to an increase in the expression of associated sequences. The choice of a biologically relevant reference is crucial for data interpretation. \u00a9 2004 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/gcc.20085","type":"journal-article","created":{"date-parts":[[2004,8,11]],"date-time":"2004-08-11T18:04:40Z","timestamp":1092247480000},"page":"191-202","source":"Crossref","is-referenced-by-count":26,"title":["Comparative expressed sequence hybridization studies of high\u2010hyperdiploid childhood acute lymphoblastic leukemia"],"prefix":"10.1002","volume":"41","author":[{"given":"Alicja M.","family":"Gruszka\u2010Westwood","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sharon W.","family":"Horsley","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Angel","family":"Martinez\u2010Ramirez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine 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