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Blood, 15 February 2004, Vol. 103, No. 4, pp. 1499-1502. Prepublished online as a Blood First Edition Paper on October 23, 2003; DOI 10.1182/blood-2003-07-2446. This Article Full Text Full Text (PDF) All Versions of this Article: 2003-07-2446v1 103/4/1499    most recent Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Gattermann, N. Articles by Hofhaus, G. Search for Related Content PubMed PubMed Citation Articles by Gattermann, N. Articles by Hofhaus, G. Related Collections Brief Reports Hematopoiesis and Stem Cells Neoplasia Related Article in Blood Online Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  NEOPLASIA Brief report Ineffective hematopoiesis linked with a mitochondrial tRNA mutation (G3242A) in a patient with myelodysplastic syndrome Norbert Gattermann, Michael Wulfert, Bärbel Junge, Ulrich Germing, Rainer Haas, and Götz Hofhaus From the Dept of Hematology, Oncology, and Clinical Immunology, and Institute of Biochemistry, Heinrich-Heine-University, Düsseldorf, Germany. In a patient with refractory anemia with excess blasts (RAEB), a somatic mutation of mitochondrial transfer RNALeu(UUR) was detected in bone marrow cells. Heteroduplex analysis indicated that 40% to 50% of mitochondrial DNA (mtDNA) molecules in the bone marrow (BM) carried the novel G3242A mutation. The proportion of mutant mtDNA was higher in CD34+ cells than in the unfractionated sample. Surprisingly, the mutation was not detectable by heteroduplex analysis in the peripheral blood (PB). However, PB CD34+ cells selected by immunomagnetic beads harbored the mutation with a proportion of approximately 50%. In hematopoietic colony assays, CD34+ cells from BM and PB yielded only colonies with wild-type mtDNA. These results indicate that the mtDNA mutation in CD34+ cells was associated with a maturation defect. Mitochondrial tRNA mutations impair mitochondrial protein synthesis, thereby causing dysfunction of the mitochondrial respiratory chain. We propose that this effect contributed to ineffective hematopoiesis in our patient. CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? Related Article in Blood Online: The myelodysplastic syndromes: heterogeneneity on many levels Peter T. Curtin Blood 2004 103: 1181-1182. [Full Text] [PDF]

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