A unique translocation of the TEL gene in a case of acute myelogenous leukemia with inv(12)(p13q15)
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Aneuploidy↗
Biomedical subjects
M Ishimae
Publications and source records attributed to M Ishimae.
[Neoplasias in hematopoietic tissues].
Leukemia-specific chromosomal aberrations are the most reliable tumor markers. Although chromosome analysis is a powerful diagnostic tool, some aberrations like monosomy 7 in AML, 15; 17 translocation in APL and trisomy 12 in CLL are not adequately detected. Fluorescence in situ hybridization is a recent method to detect specific genetic alteration in both interphase and mitoic cells and overcomes the disadvantages of conventional cytogenetics, Southern blotting and RT-PCR. In this manuscript, the advantages and limitations of the methods used for detecting leukemia/lymphoma specific chromosomal markers were discussed.
Chromosome Aberrations↗
[Progress in diagnosis of leukemia].
Recent advances in molecular biological techniques have contributed to the tremendous progression made in the field of diagnosis of leukemia. Discovery of T- or B-lymphocyte associated genes, tumor specific genes and genes involved in chromosomal translocation has made it possible to detect leukemia cells by Southern blotting, PCR, RT-PCR or fluorescence in situ hybridization (FISH). The recently developed FISH is a simple, rapid and accurate method and requires a very small amount of specimen (about 500-1000 cells). It is possible to obtain results within 48 hours of sampling. This lecture were focused on two topics; 1) The application of FISH method in the diagnosis of leukemia using three types of probes (whole chromosome painting probe, centromeric probes and oncogene specific probes) and their combinations. 2) Clarification of concepts made by molecular biology especially in Philadelphia chromosome positive leukemia, Ph-negative chronic myelocytic leukemia, endemic/sporadic type of Burkitt's lymphoma, biphenotypic leukemia and leukemia with specific translocations.
DNA Probes↗
Bone marrow suppression induced by high dose valproic acid.
A girl with intractable epilepsy who received high dose valproic acid showed bone marrow suppression, which improved after the end of valproic acid treatment and the administration of supportive treatments. Valproic acid markedly suppressed the in vitro colony growth in this patient. It is believed that high dose valproic acid treatment directly suppressed the growth of haematopoietic progenitors, resulting in bone marrow failure.
Anemia↗