PMID- 2970390 OWN - NLM STAT- MEDLINE DCOM- 19880929 LR - 20190813 IS - 0340-6199 (Print) IS - 0340-6199 (Linking) VI - 147 IP - 5 DP - 1988 Jun TI - Clonal variation in childhood acute lymphoblastic leukaemia at early and late relapse detected by analyses of phenotype and genotype. PG - 503-7 AB - To increase our knowledge of the clonal relationship of leukaemia relapse, the genotypes and phenotypes of ten children with acute lymphoblastic leukaemia (ALL) were examined at initial diagnosis and relapse. Seven patients were phenotyped as common ALL, two as mixed, and one as T-cell ALL (T-ALL). Comparative analyses of immunoglobulin (Ig) heavy and light chain as well as T-cell receptor beta-chain (T beta) sequences revealed clonal variations, i.e. appearance of a novel or an evoluted leukaemic cell clone in five patients coinciding with the loss of common acute lymphoblastic leukaemic antigen (CALLA) in four cases, irrespective of early or late relapse. Conversion of early B- to T-ALL or lymphoblastic to non-lymphoblastic leukaemia was not noted in any of the patients examined. Our results suggest that clonal variation is a frequent event in childhood ALL. FAU - Raghavachar, A AU - Raghavachar A AD - Department of Transfusion Medicine, University of Ulm, Federal Republic of Germany. FAU - Ludwig, W D AU - Ludwig WD FAU - Bartram, C R AU - Bartram CR LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Eur J Pediatr JT - European journal of pediatrics JID - 7603873 RN - 0 (Antigens, Differentiation) RN - 0 (Antigens, Neoplasm) RN - 0 (Immunoglobulins) RN - 0 (Lewis X Antigen) RN - 0 (Receptors, Antigen, T-Cell) RN - EC 3.4.24.11 (Neprilysin) SB - IM MH - Antigens, Differentiation/analysis MH - Antigens, Neoplasm/analysis/*genetics MH - B-Lymphocytes MH - Child MH - Clone Cells MH - Genotype MH - Humans MH - Immunoglobulins/genetics MH - Leukemia, Lymphoid/*genetics/immunology/pathology MH - Lewis X Antigen/analysis/genetics MH - Neprilysin MH - Phenotype MH - Receptors, Antigen, T-Cell/analysis/*genetics MH - Recurrence MH - T-Lymphocytes EDAT- 1988/06/01 00:00 MHDA- 1988/06/01 00:01 CRDT- 1988/06/01 00:00 PHST- 1988/06/01 00:00 [pubmed] PHST- 1988/06/01 00:01 [medline] PHST- 1988/06/01 00:00 [entrez] AID - 10.1007/BF00441975 [doi] PST - ppublish SO - Eur J Pediatr. 1988 Jun;147(5):503-7. doi: 10.1007/BF00441975.