Abstract
We address this issue using yeast mitochondria and the multispan protein Ugo1. Using a specific insertion assay and analysis by native gel electrophoresis, we show that the import receptor Tom70, but not its partner Tom20, is involved in the initial recognition of the Ugo1 precursor. Surprisingly, t...
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PMID: 21825074
PDF is available here.
Abstract
Experimental data indicate that moderate uncoupling oxidative phosphorylation induces reduction in production of reactive oxygen species (ROS) and promotes an increase in survival of neurons and cardiomyocytes under hypoxia and re-oxygenation conditions. Uncoupling proteins (UCP) are...
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PMID: 21961301
PDF is available here.
Abstract
We use and build on in adult life. Key to persistent modifications of neuronal connectivity and plasticity of the neocortex are molecular changes occurring at the synapse. Here we used isobaric tag for relative and absolute quantification to measure levels of 467 synaptic proteins in a well-establis...
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PMID: 21398567
PDF is available here.
Abstract
We report that knockdown of NPY expression in the DMH by adeno-associated virus-mediated RNAi reduced fat depots in rats fed regular chow and ameliorated high-fat diet-induced hyperphagia and obesity. DMH NPY knockdown resulted in development of brown adipocytes in inguinal white adipose tissue thro...
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PMID: 21531339
PDF is available here.
Abstract
We show that the greatest sensitivity and specificity are obtained by using a combination of seven carefully selected classifiers. We also show that increasing the number of independent prediction methods can paradoxically decrease the accuracy of predicting mitochondrial localization. This approach...
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PMID: 21195798
PDF is available here.
Abstract
We have identified the gene BCA1 (YLR077W). A FISH analysis showed that the BCA1 mRNA co-localized with the mitochondrial network. Cellular fractionation revealed that Bca1 is bound to the mitochondrial inner-membrane and protrudes into the inter-membrane space. We show that Bca1 controls an early s...
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PMID: 21168530
PDF is available here.
Abstract
We analysed the anti-obesity effect of ApoA-I using two mouse models, a transgenic mouse with overexpression of ApoA-I and the mice administered with an ApoA-I mimetic peptide D-4F. The mice were induced to develop obesity by feeding with high fat diet. Both ApoA-I overexpression and D-4F treatment...
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PMID: 20193037
PDF is available here.
Abstract
We decided to study the expression of the translocator protein (TSPO) 18-kDa, peroxisome proliferator-activated receptor-γ (PPAR-γ), mitochondrial uncoupling protein-1 (UCP-1), and adipocyte morphology in the adipose tissue of rats subjected to stress conditions. In our model of stress, rats faste...
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PMID: 20948513
PDF is available here.
Abstract
We used a quantitative comparative proteomic profiling approach to analyze changes in the mitochondrial proteome in AD. A triple transgenic mouse model of AD (3xTg-AD) which harbors mutations in three human transgenes, APP(Swe), PS1(M146V) and Tau(P301L), was used in these experiments. Quantitative...
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PMID: 21237293
PDF is available here.
Abstract
I dysfunction, but the exact pathways which lead to cell death have not been resolved. 2D-gel electrophoresis profiles of isolated mitochondria from neuroblastoma cells treated with subcytotoxic concentrations of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), a well-characterized complex I inh...
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PMID: 21322648
PDF is available here.
Toshiaki Watanabe,
Shinichiro Chuma,
Yasuhiro Yamamoto,
Satomi Kuramochi-Miyagawa,
Yasushi Totoki,
Atsushi Toyoda,
Yuko Hoki,
Asao Fujiyama,
Tatsuhiro Shibata,
Takashi Sado,
Toshiaki Noce,
Toru Nakano,
Norio Nakatsuji,
Haifan Lin and
Hiroyuki Sasaki
Abstract
We generated Mitopld mutant mice. The mice display meiotic arrest during spermatogenesis, demethylation and derepression of retrotransposons, and defects in primary piRNA biogenesis. Furthermore, in mutant germ cells, mitochondria and the components of the nuage, a perinuclear structure involved in...
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PMID: 21397847
PDF is available here.
Abstract
Pancreatic islets contain low activities of catalase, selenium-dependent glutathione peroxidase 1 (GPX1), and Cu,Zn-superoxide dismutase 1 (SOD1). Thus, enhancing expression of these enzymes in islets has been unquestionably favored. However, such an attempt has produced variable met...
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PMID: 20618069
PDF is available here.
Abstract
We addressed the significance of two mammalian outer membrane fusion DRPs using an in vitro mammalian mitochondrial fusion assay. We demonstrate that heterotypic MFN1-MFN2 trans complexes possess greater efficacy in fusion as compared to homotypic MFN1 or MFN2 complexes. In addition, we show that t...
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PMID: 21255726
PDF is available here.
Abstract
Frataxin, the mitochondrial protein deficient in Friedreich ataxia, a rare autosomal recessive neurodegenerative disorder, is thought to be involved in multiple iron-dependent mitochondrial pathways. In particular, frataxin plays an important role in the formation of iron-sulfur (Fe-S) clusters bioge...
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PMID: 21298097
PDF is available here.
YanFang Ju,
JinJu Yang,
Rong Liu,
XiaoLan Liu,
XueMei Du,
Li Liu,
ZhiCheng Chen,
Jun Chi,
ShuEr Liu,
Yuan Gao,
JianEn Gao,
ShunChang Jiao,
FuChu He and
QiHong Sun
Abstract
We generated >240 hybridoma cell lines from native mitochondrial proteins after cell fusion, screening, and cloning. Antibodies that recognized mitochondrial proteins were identified by screening human liver cDNA expression libraries. In this study, we identified 6 major antigens that were recognize...
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PMID: 21253866
PDF is available here.
Abstract
We performed two-dimensional polyacrylamide gel electrophoresis to determine differentially expressed proteins. Peptides of interest were further analysed by mass spectrometry and Mascot software was employed to identify protein matches.
Our data showed that ATP synthase D chain, ubi...
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PMID: 20859605
PDF is available here.
Abstract
We show for the first time that both human isoforms of the newly identified mARC (mitochondrial amidoxime reducing component) enhance the rate of reduction of NOHA, in the presence of NADH cytochrome b₅ reductase and cytochrome b₅, by more than 500-fold. Consequently, these results provide the f...
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PMID: 21029045
PDF is available here.
Abstract
We found for the first time that parkin expression was decreased in the mnd2 mouse brain. Since parkin is a crucial protein for PD, the neurodegenerative disorder in mnd2 mice may be caused by parkin protein loss. We therefore examined whether compensation of parkin protein prevents neurodegenerativ...
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PMID: 20971077
PDF is available here.
Abstract
We quantified protein vicinal dithiols within mammalian mitochondria using the vicinal dithiol-specific reagent phenylarsine oxide (PAO). We found 5-15% of thiols exposed on mitochondrial proteins were vicinal dithiols and that these thiols were particularly sensitive to oxidation by hydrogen peroxi...
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PMID: 20836988
PDF is available here.
Abstract
We exploited these variations to predict the function of two so far poorly annotated genes: Coiled-coil-helix-coiled-coil-helix domain containing 10 (CHCHD10) and glioblastoma amplified sequence (GBAS). We predicted both genes to be involved in oxidative phosphorylation. Through in vitro experiments...
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PMID: 20888800
PDF is available here.
Abstract
The mammalian mitochondrial inner membrane protein Oxa1L is involved in the insertion of a number of mitochondrial translation products into the inner membrane. During this process, the C-terminal tail of Oxa1L (Oxa1L-CTT) binds mitochondrial ribosomes and is believed to coordinate the synthesis and...
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PMID: 20739282
PDF is available here.
Abstract
We report that TpMs regulates the tethering between mitochondria and endoplasmic reticulum (ER) in a Mitofusin 2 (Mfn2)-dependent manner. Subcellular fractionation and immunostaining show that TpMs is present at the interface between mitochondria and ER. The expression of TpMs leads to mitochondrial...
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PMID: 20930847
PDF is available here.
Abstract
We demonstrate a simple, cost-effective way to sequence the full complement of protein coding mitochondrial genes from pooled samples using the 454/Roche platform. Multiplexing was achieved without the need for expensive indexing tags ('barcodes'). The method was trialled with a set of long-range po...
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PMID: 20876691
PDF is available here.
Abstract
We generated TIF2((i)skm)⁻(/)⁻ mice in which TIF2 was selectively ablated in skeletal muscle myofibers at adulthood. We found that increased mitochondrial uncoupling in skeletal muscle myocytes protected these mice from decreased muscle oxidative capacities induced by sedentariness, delayed the...
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PMID: 21035760
PDF is available here.
Abstract
We introduced an shRNA into mouse insulinoma MIN6 cells to deplete Pdx1 and found that expression of proapoptotic genes, including NIP3-like protein X (Nix), was increased. Forced Nix expression in MIN6 and pancreatic islet β cells induced programmed cell death by simultaneously activating apoptoti...
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PMID: 20978346
PDF is available here.
Abstract
We explored the nuclear genome of the cnidarian Nematostella vectensis for the presence of mt-tRNA genes and their corresponding mt aminoacyl-tRNA synthetases (mt-aaRS). We detected no candidates for mt-tRNA genes and only two mt-aaRS orthologs. At the same time, we found that all but one cytosolic...
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PMID: 20439315
PDF is available here.
Abstract
Our study presents evidence of differential tissue expression profiles of five isoforms of UCPs in normal and diet-induced obese (DIO) rats using real-time polymerase chain reaction (PCR) analysis. The results clearly show that the tissue-specific expression patterns of individual isoforms between D...
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PMID: 19834821
PDF is available here.
Abstract
In this paper, the complete mitochondrial genome of Acraea issoria (Lepidoptera: Nymphalidae: Heliconiinae: Acraeini) is reported; a circular molecule of 15,245 bp in size. For A. issoria, genes are arranged in the same order and orientation as the complete sequenced mitochondrial genomes of the oth...
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PMID: 20091125
PDF is available here.
Abstract
The review highlights recent findings regarding the functions of mitochondria in adipocytes, providing an understanding of their central roles in regulating substrate metabolism, energy expenditure, disposal of reactive oxygen species (ROS), and in the pathophysiology of obesity and...
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PMID: 20585248
PDF is available here.
Abstract
We show that human ERAL1 is a mitochondrial protein important for the formation of the 28S small mitoribosomal subunit. We also show that ERAL1 binds in vivo to the rRNA component of the small subunit [12S mt (mitochondrial)-rRNA]. Bacterial Era associates with a 3' unstructured nonanucleotide immed...
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PMID: 20604745
PDF is available here.
Abstract
We show that Ups protein import is mediated by another IMS protein, Mdm35p. In vitro import assays show that import of Ups proteins requires Mdm35p. Loss of Mdm35p led to a decrease in steady state levels of Ups proteins in mitochondria. In addition, mdm35Delta cells displayed a similar phenotype to...
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PMID: 20622808
PDF is available here.
Abstract
We separated the two mitochondrial subpopulations from skeletal muscle using a refined method that provides an excellent division of these unique mitochondrial subpopulations. Using proteomics of mitochondria and its subfractions (intermembrane space, matrix and inner membrane), a total of 325 disti...
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PMID: 20665633
PDF is available here.
Abstract
We reported 10 suspected Chinese LHON families without the three primary mutations. The overall penetrance (53.4%) in these families is significantly higher than in those families with m.11778G>A (33.3%) or m.3460G>A (25.6%). Complete mtDNA genome sequencing of the 10 families showed that they belon...
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PMID: 20643099
PDF is available here.
Abstract
We show for the first time that UCP2 knockdown participates in the mechanism of action of cisplatin, thus providing evidence that targeting UCP2 may offer clinical benefit in the treatment of cancer.
Copyright (c) 2010 Elsevier Inc. All rights reserved....
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PMID: 20595066
PDF is available here.
Abstract
We found that native UCP3 actively lowers the rate of ROS production in isolated energized skeletal muscle mitochondria, in the absence of exogenous activators. The estimated specific activity of UCP3 in lowering ROS production was 90 to 500 times higher than that of the adenine nucleotide transloca...
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PMID: 20493945
PDF is available here.
Abstract
We used a genome-wide approach to uncover sex-specific parent-of-origin allelic effects in the adult mouse brain. Our study identified preferential selection of the maternally inherited X chromosome in glutamatergic neurons of the female cortex. Moreover, analysis of the cortex and hypothalamus iden...
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PMID: 20616234
PDF is available here.
Abstract
Pretreatment of HT-29 cells with JP-1201 (5.0 microM) prior to ionizing radiation (IR) significantly decreased the survival of these cells. SCID mice bearing HT-29 xenografts demonstrated no difference in tumor load in the group receiving exclusively JP-1201 versus control. At the end of the treatme...
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PMID: 20633731
PDF is available here.
Abstract
We found no evidence of a Dutch founder for the c.1042C>T mutation in AR ataxia. We report here the first nonsense mutations in CABC1 that most likely lead to complete absence of a functional CABC1 protein. Our results indicate that CABC1 is an important candidate for mutation analysis in progressiv...
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PMID: 20580948
PDF is available here.
Abstract
We report the identification and characterization of scox, the single Drosophila melanogaster SCO-encoding gene. Null mutations of the scox gene are associated with larval lethality, while mutations in its 5'UTR are associated with motor dysfunction and female sterile phenotypes. All mutant phenotyp...
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PMID: 20388558
PDF is available here.
Abstract
Platelets participate in a variety of responses of the blood to injury. An emerging body of evidence suggests that these cells express an intrinsic capacity to interact with and trigger both classical and alternative pathways of complement. This activity requires cell activation with biochemical ago...
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PMID: 20621693
PDF is available here.
Abstract
Extracellular adenosine disrupted mitochondrial membrane potentials in HuH-7 cells, a Fas-deficient human hepatoma cell line, and the effect was inhibited by the adenosine transporter inhibitor dipyridamole or by overexpressing Bcl-X(L). Adenosine downregulated the expression of mRNAs and proteins f...
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PMID: 20063052
PDF is available here.
Abstract
We decided to pursue the question of whether polymorphic variants of genes encoding enzymes involved in choline metabolism might be associated with the maternal risk of having a baby with NCL/P. Analysis of 18 single nucleotide polymorphisms (SNPs) of betaine-homocysteine methyltransferase (BHMT), b...
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PMID: 20662904
PDF is available here.
Abstract
We now report the shared presence of two rps3 introns, namely the rps3i74 and the rps3i249, in the mitochondria of all the classes representing the surviving lineages of gymnosperms, and unveil several lineages experiencing intron loss. Interestingly, the rps3 intron gains and losses within the four...
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PMID: 20605476
PDF is available here.
Abstract
We identified 77 different proteins mostly from the oxidative phosphorylation and mitochondrial metabolism. Sedentary mice presented a significant loss of ETC functionality in opposition to active mice. Although some proteins were found damaged in both A and S mice, damage to ETC proteins was more e...
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PMID: 20513666
PDF is available here.
Abstract
We developed a rodent mitochondrial gene chip (RoMitoChip). The chip had 1088 probe sets including 46 probe sets representing 37 mouse mitochondrial DNA transcripts and the remaining probe sets representing mouse nuclear genes contributing to the mitochondrial structure and function. Mouse cardiomyo...
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PMID: 20160671
PDF is available here.
Abstract
We use the full set of MPCGs of 15 species of beetles (two of them newly sequenced here) to estimate the nucleotide evolutionary rates in a reconstructed phylogeny among suborders, paying special attention to the effect of data partitioning and model choices on these estimations. The optimal strateg...
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PMID: 20152911
PDF is available here.
Abstract
The expression of Omi/HtrA2 in kidneys is increased in postasphyxial neonatal rats. The increased Omi/HtrA2 expression may play an important role in the development of postasphyxial renal injury. Treatment with Ucf-101 can reduce the expression of Omi/HtrA2 in kidneys of postasphyxial neonatal rats...
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PMID: 20704803
PDF is available here.
Meike Moschallski,
Monika Hausmann,
Anton Posch,
Aran Paulus,
Nancy Kunz,
Thanh Tu Duong,
Brigitte Angres,
Kai Fuchsberger,
Heiko Steuer,
Dieter Stoll,
Simon Werner,
Britta Hagmeyer and
Martin Stelzle
Abstract
We have developed a microfluidic system--microPrep--for subcellular fractionation of cell homogenates based on dielectrophoretic sorting. Separation of mitochondria isolated from a human lymphoblastoid cell line was monitored by fluorescence microscopy and further characterized by western blot analy...
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PMID: 20665923
PDF is available here.
Abstract
We show, using a combination of genetic, molecular, and biochemical approaches, that Isd11, in line with its strong association with Nfs, is localized in the mitochondrion of T. brucei. In addition to its involvement in Fe/S assembly, Isd11 also partakes in both cytoplasmic and mitochondrial tRNA th...
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PMID: 20442400
PDF is available here.
Abstract
We report on the ability of exogenous GrB to insert into and function within a proteinase K-resistant mitochondrial compartment. We identified Hax-1 (HS-1-associated protein X-1), a mitochondrial protein involved in the maintenance of mitochondrial membrane potential, as a GrB substrate within the m...
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PMID: 20388708
PDF is available here.
Abstract
We show that UCP1 potently reduces mitochondrial superoxide production after cold acclimation and during fatty acid oxidation. We address the sites of superoxide production and suggest diminished probability of "reverse electron transport" facilitated by uncoupled respiration as the underlying mecha...
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PMID: 20466728
PDF is available here.
Abstract
We hypothesized that energy depletion could be a mechanism leading to difficulty maintaining wakefulness and assessed changes in components of the electron transport chain....
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PMID: 20614849
PDF is available here.
Abstract
We investigated the contribution of ROS in mitochondrial signaling pathways, death-receptor-initiated signaling pathway, and endoplasmic reticulum stress in butyric-acid-induced T-cell apoptosis. N-acetyl-L-Cysteine (NAC) abrogated mitochondrial injury, cytochrome c, AIF, and Smac release, and Bcl-2...
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PMID: 20439934
PDF is available here.
Abstract
We investigated the involvement of basal sympathetic tone in brown adipose tissue (BAT) recruitment and gene expression profile induced by peroxisome proliferator-activated receptor-gamma (PPAR-gamma) activation. Innervated and surgically denervated BAT pads of rats treated or not with rosiglitazone...
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PMID: 20393157
PDF is available here.
Abstract
We sought to determine the molecular basis of elevations in aerobic metabolic capacity in the oxidative muscle and liver of Gasterosteus aculeatus in response to cold acclimation. Fishes were cold- or warm-acclimated for 9 wk and harvested on days 1, 2, and 3 and weeks 1, 4, and 9 of cold acclimatio...
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PMID: 20427717
PDF is available here.
Abstract
We present the 91,500 bp mitochondrial genome of the wood-degrading basidiomycete Trametes cingulata and compare it with the mitochondrial genomes of five additional Basidiomycota species. The Trametes mitochondrial genome encodes 15 proteins, 25 tRNAs and the small and large rRNAs. All of the genes...
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PMID: 20455947
PDF is available here.
Nopasak Phasukkijwatana,
Bussaraporn Kunhapan,
Jim Stankovich,
Wanicha L Chuenkongkaew,
Russell Thomson,
Timothy Thornton,
Melanie Bahlo,
Taisei Mushiroda,
Yusuke Nakamura,
Surakameth Mahasirimongkol,
Aung Win Tun,
Chatchawan Srisawat,
Chanin Limwongse,
Chayanon Peerapittayamongkol,
Thanyachai Sura,
Wichit Suthammarak and
Patcharee Lertrit
Abstract
We first conducted a genome-wide linkage scan with 400 microsatellite markers in 9 large Thai LHON G11778A pedigrees. Using an affecteds-only nonparametric linkage analysis, 4 regions on chromosomes 3, 12, 13 and 18 showed Zlr scores greater than 2 (P < 0.025), which is consistently significant acro...
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PMID: 20407791
PDF is available here.
Nopasak Phasukkijwatana,
Bussaraporn Kunhapan,
Jim Stankovich,
Wanicha L Chuenkongkaew,
Russell Thomson,
Timothy Thornton,
Melanie Bahlo,
Taisei Mushiroda,
Yusuke Nakamura,
Surakameth Mahasirimongkol,
Aung Win Tun,
Chatchawan Srisawat,
Chanin Limwongse,
Chayanon Peerapittayamongkol,
Thanyachai Sura,
Wichit Suthammarak and
Patcharee Lertrit
Abstract
We first conducted a genome-wide linkage scan with 400 microsatellite markers in 9 large Thai LHON G11778A pedigrees. Using an affecteds-only nonparametric linkage analysis, 4 regions on chromosomes 3, 12, 13 and 18 showed Zlr scores greater than 2 (P < 0.025), which is consistently significant acro...
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PMID: 20407791
PDF is available here.
Nopasak Phasukkijwatana,
Bussaraporn Kunhapan,
Jim Stankovich,
Wanicha L Chuenkongkaew,
Russell Thomson,
Timothy Thornton,
Melanie Bahlo,
Taisei Mushiroda,
Yusuke Nakamura,
Surakameth Mahasirimongkol,
Aung Win Tun,
Chatchawan Srisawat,
Chanin Limwongse,
Chayanon Peerapittayamongkol,
Thanyachai Sura,
Wichit Suthammarak and
Patcharee Lertrit
Abstract
We first conducted a genome-wide linkage scan with 400 microsatellite markers in 9 large Thai LHON G11778A pedigrees. Using an affecteds-only nonparametric linkage analysis, 4 regions on chromosomes 3, 12, 13 and 18 showed Zlr scores greater than 2 (P < 0.025), which is consistently significant acro...
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PMID: 20407791
PDF is available here.