Human Molecular Genetics Advance Access originally published online on April 13, 2006
Human Molecular Genetics 2006 15(11):1801-1807; doi:10.1093/hmg/ddl102
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Suppression of disease phenotypes of adult mito-mice carrying pathogenic mtDNA by bone marrow transplantation
1Graduate School of Life and Environmental Sciences and 2Center for Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan and 3Subteam for Manipulation of Cell Fate, BioResource Center, RIKEN Tsukuba Institute, Ibaraki 305-0074, Japan
* To whom correspondence should be addressed at: Graduate School of Life and Environmental Sciences, Institute of Biological Sciences, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8572, Japan. Tel/Fax: +81 298536650; Email: jih45{at}sakura.cc.tsukuba.ac.jp
Received March 6, 2006; Accepted April 7, 2006
For directly addressing the issue of gene therapy of adult patients with mitochondrial diseases, we carried out bone marrow transplantation to adult mito-mice with mutated mtDNA and expressing respiration defects for improvement of disease phenotypes. We supposed that bone marrow cells transdifferentiated into various tissues, so that their transplantation would suppress disease phenotypes. The results showed improvement of survival and delayed expression of renal failure. As most mito-mice without a transplant died due to renal failure, we examined whether transplanted bone marrow cells transdifferentiated into renal tissues carrying improved renal function. Histochemical analyses showed that the suppression of disease phenotypes was not due to transdifferentiation, but due to suppression of apoptosis of renal cells. Thus, bone marrow cells possess a novel function of supporting tissues by suppressing apoptosis induced by respiration defects.
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