Comprehensive scanning of somatic mitochondrial DNA alterations in acute leukemia developing from myelodysplastic syndromes.

Abstract

Myelodysplastic syndromes (MDS) are clonal myeloid disorders characterized by ineffective hematopoiesis resulting in refractory cytopenias. Transformation resulting in acute myeloblastic leukemia is the final stage in the multistep process of MDS evolution. Functional relevant mutations of mitochondrial DNA (mtDNA) have been related to sideroblastic anemia and MDS. To investigate the role of mtDNA in malignant transformation to acute leukemia, we used high-resolution techniques such as single-strand conformational polymorphism and fluorescence sequencing for investigation of the whole mitochondrial genome from blood cells of 10 patients with MDS. Functionally relevant point mutations in mitochondrial RNA and polypeptide-encoding genes were detected in 50% of patients with MDS. Their increasing mutation load connects MDS and the developing acute myeloid leukemias. Several point mutations of mtDNA, including secondary point mutations for Leber's hereditary optic neuropathy, occur in one bone marrow and may synergically affect bone marrow stem cells by an apoptotic pathway.

• Authors: Bjoern Linnartz, Roswitha Anglmayer, Stefanie Zanssen
• Journal: Cancer research (Cancer Res) Vol. 64 Issue 6 Pg. 1966-71 (Mar 15 2004) ISSN: 0008-5472 [Print] United States
• PMID: 15026331 (Publication Type: Case Reports, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• DNA, Mitochondrial
• DNA

Topics

• Acute Disease
• Aged
• Bone Marrow (pathology)
• Cell Transformation, Neoplastic
• DNA (blood)
• DNA, Mitochondrial (genetics)
• Female
• Humans
• Leukemia, Myeloid (genetics)
• Middle Aged
• Myelodysplastic Syndromes (genetics)
• Point Mutation
• Polymerase Chain Reaction
• Polymorphism, Restriction Fragment Length
• Polymorphism, Single-Stranded Conformational