发布: 2016年10月20日第6卷第20期 DOI: 10.21769/BioProtoc.1976 浏览次数: 11468
评审: Masahiro MoritaAnonymous reviewer(s)
Abstract
The mitochondrial paradigm for common disease proposes that mitochondrial DNA (mtDNA) sequence variation can contribute to disease susceptibility and progression. To test this concept, we developed the Mitochondrial-nuclear eXchange (MNX) model, in which isolated embryonic pronuclei from one strain of species are implanted into an enucleated embryo of a different strain of the same species (e.g., C57BL/6 and C3H/HeN, Mus musculus), generating a re-constructed zygote harboring nuclear and mitochondrial genomes from different strains. Two-cell embryos are transferred to the ostia of oviducts in CD-1 pseudopregnant mice and developed to term. Nuclear genotype and mtDNA haplotype are verified in offspring, and females selected as founders for desired MNX colonies. By utilizing MNX models, many new avenues for the in vivo study for mitochondrial and nuclear genetics, or mito-Mendelian genetics, are now possible.
Keywords: Mitochondria (线粒体)Background
The isolation of nuclear and mitochondrial genomes in MNX mice strains allows examination of pathomechanisms of dysfunctional bioenergetics such as cardiovascular disease (Fetterman et al., 2013; Grimsditch et al., 2000; Paigen et al., 1990; Wang et al., 2005), glucose tolerance (Freeman et al., 2006; Kaku et al., 1988) and fatty liver disease (Betancourt et al., 2014). This approach is distinct from conplastic (Yu et al., 2009) and xenomitochondrial (McKenzie et al., 2004) approaches in that MNX mice are generated directly with 100% of the desired nuclear and mtDNA complements from respective donor strains through nuclear transfer and thus do not require repeated back-crossings (as do conplastics) to generate animals having the desired genotype (Figure 1). Furthermore, MNX mice allow direct, unambiguous assessment of mtDNA contributions to disease since there is no complexity introduced by potential nuclear cross-over and combinational effects in the filial generations associated with standard backcrossing methods used to generate conplastic mice.
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版权信息
© 2016 The Authors; exclusive licensee Bio-protocol LLC.
如何引用
Kesterson, R. A., Johnson, L. W., Lambert, L. J., Vivian, J. L., Welch, D. R. and Ballinger, S. W. (2016). Generation of Mitochondrial-nuclear eXchange Mice via Pronuclear Transfer. Bio-protocol 6(20): e1976. DOI: 10.21769/BioProtoc.1976.
分类
分子生物学 > DNA > 诱/突变
分子生物学 > DNA > 基因分型
分子生物学 > DNA > DNA 克隆
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