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DNA-fingerprint changes compared to karyotypes in acute leukemia
S Pakkala1, S Knuutila, P Helminen
1Transplantation Laboratory, University of Helsinki, Finland.
Leukemia
|December 1, 1990
Summary
DNA-fingerprint (DNA-F) analysis offers complementary molecular markers for acute leukemia follow-up, detecting changes missed by chromosomal analysis. This method aids in identifying new DNA markers and potential chromosome associations in leukemia.
Area of Science:
- Hematology
- Molecular Biology
- Genetics
Background:
- Chromosomal analysis is standard for acute leukemia, but fails in 10-46% of cases lacking karyotypic abnormalities.
- Unspecific DNA-fingerprint (DNA-F) changes have been identified in leukemia's blastic phase.
Purpose of the Study:
- To evaluate DNA-fingerprint (DNA-F) analysis as a complementary method to chromosomal analysis in acute leukemia.
- To explore the potential of DNA-F alterations as molecular markers for disease follow-up.
- To investigate possible associations between DNA-F changes and specific chromosomal abnormalities.
Main Methods:
- Comparative analysis of DNA-fingerprint (DNA-F) and karyotypes in 50 acute leukemia patients.
- Detection of DNA-F alterations and chromosomal abnormalities in blastic phase samples.
Main Results:
- DNA-F alterations were found in 19 patients, while 31 had abnormal karyotypes; 12 showed both.
- DNA-F changes were detected in 6 of 16 patients with normal karyotypes.
- Three acute myeloid leukemia (AML) patients with DNA-F changes had trisomy 8, suggesting a potential AML-associated minisatellite locus on chromosome 8.
Conclusions:
- DNA-fingerprint (DNA-F) analysis and chromosomal analysis are complementary in acute leukemia follow-up.
- DNA-F analysis can identify molecular markers in cases with normal karyotypes.
- Further research may localize specific minisatellite loci related to leukemia, potentially on chromosome 8.