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Lookup NU author(s): Dr Sally Coulthard
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Thiopurine methyltransferase (TPMT) is involved in the metabolism of thiopurines such as 6-mercaptopurine and 6-thioguanine. TPMT activity is significantly altered by genetics, and heterozygous and even more homozygous variant people reveal substiantially decreased TPMT activity. Treatment for childhood acute lymphoblastic leukemia (ALL) regularly includes the use of thiopurine drugs. Importantly, childhood ALL patients with low TPMT activity have been considered to be at increased risk of developing therapy-associated acute myeloid leukemia and brain tumors. In the present study, we genotyped 105 of 129 patients who developed a secondary malignant neoplasm after ALL treatment on 7 consecutive German Berlin-Frankfurt-Munster trials for all functionally relevant TPMT variants. Frequencies of TPMT variants were similarly distributed in secondary malignant neoplasm patients and the overall ALL patient population of 814 patients. Thus, TPMT does not play a major role in the etiology of secondary malignant neoplasm after treatment for childhood ALL, according to Berlin-Frankfurt-Munster strategies. (Blood. 2009;114:1314-1318)
Author(s): Stanulla M, Schaeffeler E, Möricke A, Coulthard SA, Cario G, Schrauder A, Kaatsch P, Dördelmann M, Welte K, Zimmermann M, Reiter A, Eichelbaum M, Riehm H, Schrappe M, Schwab M
Publication type: Article
Publication status: Published
Journal: Blood
Year: 2009
Volume: 114
Issue: 7
Pages: 1314-1318
ISSN (print): 0006-4971
ISSN (electronic): 1528-0020
Publisher: American Society of Hematology
URL: http://dx.doi.org/10.1182/blood-2008-12-193250
DOI: 10.1182/blood-2008-12-193250
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