{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T04:39:53Z","timestamp":1769056793112,"version":"3.49.0"},"reference-count":44,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2002,4,25]],"date-time":"2002-04-25T00:00:00Z","timestamp":1019692800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Br J Haematol"],"published-print":{"date-parts":[[2002,5]]},"abstract":"<jats:p><jats:bold>Summary.<\/jats:bold> Infant t(4;11) acute lymphoblastic leukaemia (ALL) is a rare but cytogenetically well defined subgroup of immature B\u2010cell precursor (BCP) ALL. To date, the configuration of their antigen receptor genes has not been studied in a large group of patients so far. In this study on 27 t(4;11) infant ALL, we have used standardized primer sets for the detection of all incomplete and complete immunoglobulin (Ig) heavy chain (IGH) rearrangements, as well as for the Ig light chain kappa (IGK), T\u2010cell receptor delta (TCRD) and gamma (TCRG) rearrangements that are most common in childhood BCP ALL. Only 52% of cases displayed clonotypic antigen receptor gene rearrangements (IGH in 48%, IGK, TCRD and TCRG in 12%, 41% and 6% respectively). This low frequency suggests, together with the findings of predominantly incomplete DJ<jats:sc>h<\/jats:sc> joins and monoallelic IGH rearrangements, that they are derived from an immature progenitor cell. As 48% of the t(4;11) infant ALL cases had no detectable antigen receptor gene rearrangements that could be used for minimal residual disease (MRD) analysis, we established an expression\u2010independent, leukaemia\u2010specific polymerase chain reaction (PCR) using the genomic sequence of the MLL\u2013AF4 fusion genes. This method had high sensitivity and specificity and resulted in identical estimations of tumour loads when compared with IGH targets. Thus, genomic MLL\u2013AF4 fusion genes are a good alternative target for the analysis of MRD in patients with t(4;11) leukaemias.<\/jats:p>","DOI":"10.1046\/j.1365-2141.2002.03428.x","type":"journal-article","created":{"date-parts":[[2003,3,11]],"date-time":"2003-03-11T06:44:12Z","timestamp":1047365052000},"page":"315-321","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Low frequency of clonotypic Ig and T\u2010cell receptor gene rearrangements in t(4;11) infant acute lymphoblastic leukaemia and its implication for the detection of minimal residual disease"],"prefix":"10.1111","volume":"117","author":[{"given":"Martina","family":"Peham","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Simon","family":"Panzer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karin","family":"Fasching","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Oskar A.","family":"Haas","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Susanna","family":"Fischer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rolf","family":"Marschalek","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Helmut","family":"Gadner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E. 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