Summary
Deletion of the short arm of chromosome 9p involving the Β1-interferon (IFN) gene has been implicated in the process of malignant transformation in lymphomas and acute lymphoblastic leukemias. Since cytogenetic analysis is frequently unsuccessful in clinical samples, we used a recently described differential PCR technique to detect losses within the Β1-IFN gene in 86 acute leukemias. Using differential PCR, no Β1-IFN deletion was detected in 44 acute myeloid leukemia (AML) and eight control samples. However, five of 42 acute lymphoblastic leukemia (ALL) probes (12%) exhibited loss of the Β1-IFN gene (three common ALL, two T-ALL). Cytogenetic analysis was performed independently in three of these five cases and revealed abnormalities of chromosome 9p in two samples. Two of five T-ALL cases exhibited a loss within the Β1-IFN gene, compared with 3/29 c-ALLs, suggesting a predominance of IFN gene loss in T-ALLs. These data indicate that PCR can be used for rapid detection of gene dosage phenomena in clinical leukemia samples.
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Schmidt, C.A., Neubauer, A., Seeger, K.H. et al. Detection of allelic loss within the β1-interferon gene in childhood acute lymphoblastic leukemia using differential PCR. Ann Hematol 68, 171–174 (1994). https://doi.org/10.1007/BF01834362
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DOI: https://doi.org/10.1007/BF01834362