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Ref Type Journal Article
PMID (25266042)
Authors Ono R, Hasegawa D, Hirabayashi S, Kamiya T, Yoshida K, Yonekawa S, Ogawa C, Hosoya R, Toki T, Terui K, Ito E, Manabe A
Title Acute megakaryoblastic leukemia with acquired trisomy 21 and GATA1 mutations in phenotypically normal children.
Journal European journal of pediatrics
Vol 174
Issue 4
Date 2015 Apr
URL
Abstract Text GATA1 mutations are found almost exclusively in children with myeloid proliferations related to Down syndrome (DS). Here, we report two phenotypically and cytogenetically normal children with acute megakaryoblastic leukemia (AMKL) whose blasts had both acquired trisomy 21 and GATA1 mutation. Patient 1 was diagnosed with transient abnormal myelopoiesis in the neonatal period. Following spontaneous improvement of the disease, leukemic blasts increased 7 months later. He received less intensive chemotherapy, and he is now 6 years old in complete remission. Patient 2 was diagnosed with AMKL at the age of 18 months. Although he received intensive chemotherapy and a cord blood transplantation, he died without gaining remission. In both cases, trisomy 21 and GATA1 mutation were detected only in leukemic blasts, but not in germline samples. Based on a literature review, we identified reports describing 14 non-DS AMKL with GATA1 mutation and acquired trisomy 21. Of those, 12 cases were diagnosed during the neonatal period, whereas the remaining 2 cases were diagnosed at the age of 22 and 31 months, respectively.These cases suggest that GATA1 mutation may cooperate with the additional chromosome 21 in developing myeloid proliferations even in non-DS patients.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
GATA1 mutant megakaryocytic leukemia not applicable N/A Clinical Study Diagnostic GATA1 mutations are used in the diagnosis of Down Syndrome related acute megakaryoblastic leukemia (PMID: 25266042, PMID: 14636651, PMID: 12586620). 14636651 12586620 25266042