TEL/AML1 fusion gene resulting from a cryptic t(12;21) is uncommon in adult patients with B-cell lineage ALL and CML lymphoblastic transformation.
TEL is a new member of the ETS-like family on chromosome 12 and forms fusion genes with several partners in leukemia. Among these fusion genes, the TEL/AML1 translocation resulting from t(12;21) is found in approximately one quarter of the childhood B-cell lineage acute lymphoblastic leukemia (ALL) cases and its prognosis is excellent. We examined 42 adult patients with B-cell lineage ALL and 13 adult patients with lymphoblastic transformation of chronic myeloid leukemia (CML) to detect TEL/AML1 fusion genes using the reverse transcriptase-polymerase chain reaction (RT-PCR) and Southern blotting, but no translocation was detected. These findings indicate that absence of the TEL/AML1 fusion transcript partly correlates with the poorer outcome of adult B-cell lineage ALL as compared with childhood ALL and the TEL/AML1 fusion transcript is specific for pediatric B-cell lineage ALL.
Hoshino
K
K
Second Department of Internal Medicine, Kumamoto University School of Medicine, Japan.
Asou
N
N
Suzushima
H
H
Osato
M
M
Yamasaki
H
H
Okubo
T
T
Nishimura
S
S
Kiyokawa
T
T
Kawano
F
F
Takatsuki
K
K
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000818:Animals; D014408:Biomarkers, Tumor / Q000032:analysis / Q000235:genetics*; D001752:Blast Crisis / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D002051:Burkitt Lymphoma / Q000235:genetics* / Q000401:mortality; D002471:Cell Transformation, Neoplastic / Q000235:genetics; D002648:Child; D002881:Chromosomes, Human, Pair 12 / Q000235:genetics* / Q000648:ultrastructure; D002891:Chromosomes, Human, Pair 21 / Q000235:genetics* / Q000648:ultrastructure; D050676:Core Binding Factor Alpha 2 Subunit; D015973:Gene Expression Regulation, Leukemic; D005787:Gene Frequency; D006801:Humans; D015464:Leukemia, Myelogenous, Chronic, BCR-ABL Positive / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000032:analysis / Q000235:genetics* / Q000502:physiology; D015514:Oncogene Proteins, Fusion; D011379:Prognosis; D014178:Translocation, Genetic; D000097764:ETS Translocation Variant 6 Protein
D014408:Biomarkers, Tumor; D050676:Core Binding Factor Alpha 2 Subunit; D009363:Neoplasm Proteins; D015514:Oncogene Proteins, Fusion; C102421:TEL-AML1 fusion protein; D000097764:ETS Translocation Variant 6 Protein