Onset and organ specificity of Tk2 deficiency depends on Tk1 down-regulation and transcriptional compensation.

Abstract:

:Deficiency of thymidine kinase 2 (TK2) is a frequent cause of isolated myopathy or encephalomyopathy in children with mitochondrial DNA (mtDNA) depletion. To determine the bases of disease onset, organ specificity and severity of TK2 deficiency, we have carefully characterized Tk2 H126N knockin mice (Tk2-/-). Although normal until postnatal day 8, Tk2-/- mice rapidly develop fatal encephalomyopathy between postnatal days 10 and 13. We have observed that wild-type Tk2 activity is constant in the second week of life, while Tk1 activity decreases significantly between postnatal days 8 and 13. The down-regulation of Tk1 activity unmasks Tk2 deficiency in Tk2-/- mice and correlates with the onset of mtDNA depletion in the brain and the heart. Resistance to pathology in Tk2 mutant organs depends on compensatory mechanisms to the reduced mtDNA level. Our analyses at postnatal day 13 have revealed that Tk2-/- heart significantly increases mitochondrial transcript levels relative to the mtDNA content. This transcriptional compensation allows the heart to maintain normal levels of mtDNA-encoded proteins. The up-regulation in mitochondrial transcripts is not due to increased expression of the master mitochondrial biogenesis regulators peroxisome proliferator-activated receptor-gamma coactivator 1 alpha and nuclear respiratory factors 1 and 2, or to enhanced expression of the mitochondrial transcription factors A, B1 or B2. Instead, Tk2-/- heart compensates for mtDNA depletion by down-regulating the expression of the mitochondrial transcriptional terminator transcription factor 3 (MTERF3). Understanding the molecular mechanisms that allow Tk2 mutant organs to be spared may help design therapies for Tk2 deficiency.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Dorado B,Area E,Akman HO,Hirano M

doi

10.1093/hmg/ddq453

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

155-64

issue

1

eissn

0964-6906

issn

1460-2083

pii

ddq453

journal_volume

20

pub_type

杂志文章
  • Most genome-wide significant susceptibility loci for schizophrenia and bipolar disorder reported to date cross-traditional diagnostic boundaries.

    abstract::Recent findings from genetic epidemiology and from genome-wide association studies point strongly to a partial overlap in the genes that contribute susceptibility to schizophrenia and bipolar disorder (BD). Previous data have also directly implicated one of the best supported schizophrenia-associated loci, zinc finger...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddq471

    authors: Williams HJ,Craddock N,Russo G,Hamshere ML,Moskvina V,Dwyer S,Smith RL,Green E,Grozeva D,Holmans P,Owen MJ,O'Donovan MC

    更新日期:2011-01-15 00:00:00

  • Integrative genome and transcriptome analyses reveal two distinct types of ring chromosome in soft tissue sarcomas.

    abstract::Gene amplification is a common phenomenon in malignant neoplasms of all types. One mechanism behind increased gene copy number is the formation of ring chromosomes. Such structures are mitotically unstable and during tumor progression they accumulate material from many different parts of the genome. Hence, their conte...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddt479

    authors: Nord KH,Macchia G,Tayebwa J,Nilsson J,Vult von Steyern F,Brosjö O,Mandahl N,Mertens F

    更新日期:2014-02-15 00:00:00

  • Meta-analysis of genome scans of age-related macular degeneration.

    abstract::A genetic contribution to the development of age-related macular degeneration (AMD) is well established. Several genome-wide linkage studies have identified a number of putative susceptibility loci for AMD but only a few of these regions have been replicated in independent studies. Here, we perform a meta-analysis of ...

    journal_title:Human molecular genetics

    pub_type: 杂志文章,meta分析

    doi:10.1093/hmg/ddi230

    authors: Fisher SA,Abecasis GR,Yashar BM,Zareparsi S,Swaroop A,Iyengar SK,Klein BE,Klein R,Lee KE,Majewski J,Schultz DW,Klein ML,Seddon JM,Santangelo SL,Weeks DE,Conley YP,Mah TS,Schmidt S,Haines JL,Pericak-Vance MA,Gorin

    更新日期:2005-08-01 00:00:00

  • Predominance of pathogenic missense variants in the RAD51C gene occurring in breast and ovarian cancer families.

    abstract::RAD51C was defined by Meindl et al. in 2010 as a high-risk gene involved in hereditary breast and ovarian cancers. Although this role seems to be clear, nowadays there is controversy about the indication of including the gene in routine clinical genetic testing, due to the lower prevalence or the absence of mutations ...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/dds115

    authors: Osorio A,Endt D,Fernández F,Eirich K,de la Hoya M,Schmutzler R,Caldés T,Meindl A,Schindler D,Benitez J

    更新日期:2012-07-01 00:00:00

  • Coronary heart disease is associated with a mutation in mitochondrial tRNA.

    abstract::Coronary heart disease (CHD) is the leading cause of death worldwide. Mitochondrial genetic determinant for the development of CHD remains poorly explored. We report there the clinical, genetic, molecular and biochemical characterization of a four-generation Chinese family with maternally inherited CHD. Thirteen of 32...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddt256

    authors: Jia Z,Wang X,Qin Y,Xue L,Jiang P,Meng Y,Shi S,Wang Y,Qin Mo J,Guan MX

    更新日期:2013-10-15 00:00:00

  • The apical ectodermal ridge of the mouse model of ectrodactyly Dlx5;Dlx6-/- shows altered stratification and cell polarity, which are restored by exogenous Wnt5a ligand.

    abstract::The congenital malformation split hand/foot (SHFM) is characterized by missing central fingers and dysmorphology or fusion of the remaining ones. Type-1 SHFM is linked to deletions/rearrangements of the DLX5-DLX6 locus and point mutations in the DLX5 gene. The ectrodactyly phenotype is reproduced in mice by the double...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddv514

    authors: Conte D,Garaffo G,Lo Iacono N,Mantero S,Piccolo S,Cordenonsi M,Perez-Morga D,Orecchia V,Poli V,Merlo GR

    更新日期:2016-02-15 00:00:00

  • NEDD4-mediated HSF1 degradation underlies α-synucleinopathy.

    abstract::Cellular protein homeostasis is achieved by a delicate network of molecular chaperones and various proteolytic processes such as ubiquitin-proteasome system (UPS) to avoid a build-up of misfolded protein aggregates. The latter is a common denominator of neurodegeneration. Neurons are found to be particularly vulnerabl...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddv445

    authors: Kim E,Wang B,Sastry N,Masliah E,Nelson PT,Cai H,Liao FF

    更新日期:2016-01-15 00:00:00

  • Mutant SPTLC1 dominantly inhibits serine palmitoyltransferase activity in vivo and confers an age-dependent neuropathy.

    abstract::Mutations in enzymes involved in sphingolipid metabolism and trafficking cause a variety of neurological disorders, but details of the molecular pathophysiology remain obscure. SPTLC1 encodes one subunit of serine palmitoyltransferase (SPT), the rate-limiting enzyme in sphingolipid synthesis. Mutations in SPTLC1 cause...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddi380

    authors: McCampbell A,Truong D,Broom DC,Allchorne A,Gable K,Cutler RG,Mattson MP,Woolf CJ,Frosch MP,Harmon JM,Dunn TM,Brown RH Jr

    更新日期:2005-11-15 00:00:00

  • Different mechanisms cause imprinting defects at the IGF2/H19 locus in Beckwith-Wiedemann syndrome and Wilms' tumour.

    abstract::The parent of origin-dependent expression of the IGF2 and H19 genes is controlled by the imprinting centre 1 (IC1) consisting in a methylation-sensitive chromatin insulator. Deletions removing part of IC1 have been found in patients affected by the overgrowth- and tumour-associated Beckwith-Wiedemann syndrome (BWS). T...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddn031

    authors: Cerrato F,Sparago A,Verde G,De Crescenzo A,Citro V,Cubellis MV,Rinaldi MM,Boccuto L,Neri G,Magnani C,D'Angelo P,Collini P,Perotti D,Sebastio G,Maher ER,Riccio A

    更新日期:2008-05-15 00:00:00

  • Full-length dystrophin expression in half of the heart cells ameliorates beta-isoproterenol-induced cardiomyopathy in mdx mice.

    abstract::Gene therapy holds great promise for curing Duchenne muscular dystrophy (DMD), the most common fatal inherited childhood muscle disease. Success of DMD gene therapy depends upon functional improvement in both skeletal and cardiac muscle. Numerous gene transfer studies have been performed to correct skeletal muscle pat...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddh174

    authors: Yue Y,Skimming JW,Liu M,Strawn T,Duan D

    更新日期:2004-08-01 00:00:00

  • Whole-exome imputation of sequence variants identified two novel alleles associated with adult body height in African Americans.

    abstract::Adult body height is a quantitative trait for which genome-wide association studies (GWAS) have identified numerous loci, primarily in European populations. These loci, comprising common variants, explain <10% of the phenotypic variance in height. We searched for novel associations between height and common (minor all...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddu361

    authors: Du M,Auer PL,Jiao S,Haessler J,Altshuler D,Boerwinkle E,Carlson CS,Carty CL,Chen YD,Curtis K,Franceschini N,Hsu L,Jackson R,Lange LA,Lettre G,Monda KL,National Heart, Lung, and Blood Institute (NHLBI) GO Exome Sequencing

    更新日期:2014-12-15 00:00:00

  • Sonic Hedgehog, a key development gene, experienced intensified molecular evolution in primates.

    abstract::Sonic Hedgehog (SHH) is one of the most intensively studied genes in developmental biology. It is a highly conserved gene, found in species as diverse as arthropods and mammals. The mammalian SHH encodes a signaling molecule that plays a central role in developmental patterning, especially of the nervous system and th...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddl123

    authors: Dorus S,Anderson JR,Vallender EJ,Gilbert SL,Zhang L,Chemnick LG,Ryder OA,Li W,Lahn BT

    更新日期:2006-07-01 00:00:00

  • PGC-1alpha/beta upregulation is associated with improved oxidative phosphorylation in cells harboring nonsense mtDNA mutations.

    abstract::We have studied the functional effects of nonsense mitochondrial DNA (mtDNA) mutations in the COXI and ND5 genes in a colorectal tumor cell line. Surprisingly, these cells had an efficient oxidative phosphorylation (OXPHOS); however, when mitochondria from these cells were transferred to an osteosarcoma nuclear backgr...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddm045

    authors: Srivastava S,Barrett JN,Moraes CT

    更新日期:2007-04-15 00:00:00

  • A human keratin 10 knockout causes recessive epidermolytic hyperkeratosis.

    abstract::Epidermolytic hyperkeratosis (EHK) is a blistering skin disease inherited as an autosomal-dominant trait. The disease is caused by genetic defects of the epidermal keratin K1 or K10, leading to an impaired tonofilament network of differentiating epidermal cells. Here, we describe for the first time a kindred with rece...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddl028

    authors: Müller FB,Huber M,Kinaciyan T,Hausser I,Schaffrath C,Krieg T,Hohl D,Korge BP,Arin MJ

    更新日期:2006-04-01 00:00:00

  • Genome-wide meta-analysis for severe diabetic retinopathy.

    abstract::Diabetic retinopathy is a leading cause of blindness. The purpose of this study is to identify novel genetic loci associated with the sight threatening complications of diabetic retinopathy. We performed a meta-analysis of genome-wide association data for severe diabetic retinopathy as defined by diabetic macular edem...

    journal_title:Human molecular genetics

    pub_type: 杂志文章,meta分析

    doi:10.1093/hmg/ddr121

    authors: Grassi MA,Tikhomirov A,Ramalingam S,Below JE,Cox NJ,Nicolae DL

    更新日期:2011-06-15 00:00:00

  • An alpha-tectorin gene defect causes a newly identified autosomal recessive form of sensorineural pre-lingual non-syndromic deafness, DFNB21.

    abstract::In our efforts to identify new loci responsible for non-syndromic autosomal recessive forms of deafness, DFNB loci, we have pursued the analysis of large consanguineous affected families living in geographically isolated areas. Here, we report on the study of a Lebanese family comprising nine members presenting with a...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/8.3.409

    authors: Mustapha M,Weil D,Chardenoux S,Elias S,El-Zir E,Beckmann JS,Loiselet J,Petit C

    更新日期:1999-03-01 00:00:00

  • A human homologue of Drosophila minibrain (MNB) is expressed in the neuronal regions affected in Down syndrome and maps to the critical region.

    abstract::The minibrain (mnb) gene of Drosophila melanogaster encodes a serine-threonine protein kinase with an essential role in postembryonic neurogenesis. A corresponding human gene with similar function to mnb could provide important insights into both normal brain development and the abnormal brain development and mental r...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/5.9.1305

    authors: Guimerá J,Casas C,Pucharcòs C,Solans A,Domènech A,Planas AM,Ashley J,Lovett M,Estivill X,Pritchard MA

    更新日期:1996-09-01 00:00:00

  • Over-expression of angiotensin converting enzyme-1 augments cardiac hypertrophy in transgenic rats.

    abstract::Increased cardiac angiotensin converting enzyme-1 (ACE1) is found in individuals who carry a deletion in intron 16 of ACE1 gene or in individuals who suffer from cardiac disorders, such as hypertrophy. However, whether a single increase in ACE1 expression leads to spontaneous cardiac defects remains unknown. To determ...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddh147

    authors: Tian XL,Pinto YM,Costerousse O,Franz WM,Lippoldt A,Hoffmann S,Unger T,Paul M

    更新日期:2004-07-15 00:00:00

  • Mice with an isoform-ablating Mecp2 exon 1 mutation recapitulate the neurologic deficits of Rett syndrome.

    abstract::Mutations in MECP2 cause the neurodevelopmental disorder Rett syndrome (RTT OMIM 312750). Alternative inclusion of MECP2/Mecp2 exon 1 with exons 3 and 4 encodes MeCP2-e1 or MeCP2-e2 protein isoforms with unique amino termini. While most MECP2 mutations are located in exons 3 and 4 thus affecting both isoforms, MECP2 e...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddt640

    authors: Yasui DH,Gonzales ML,Aflatooni JO,Crary FK,Hu DJ,Gavino BJ,Golub MS,Vincent JB,Carolyn Schanen N,Olson CO,Rastegar M,Lasalle JM

    更新日期:2014-05-01 00:00:00

  • Functional implications of splicing polymorphisms in the human genome.

    abstract::Proper splicing is often crucial for gene functioning and its disruption may be strongly deleterious. Nevertheless, even the essential for splicing canonical dinucleotides of the splice sites are often polymorphic. Here, we use data from The 1000 Genomes Project to study single-nucleotide polymorphisms (SNPs) in the c...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddt200

    authors: Kurmangaliyev YZ,Sutormin RA,Naumenko SA,Bazykin GA,Gelfand MS

    更新日期:2013-09-01 00:00:00

  • The primary open-angle glaucoma gene WDR36 functions in ribosomal RNA processing and interacts with the p53 stress-response pathway.

    abstract::Primary open-angle glaucoma (POAG) is a genetically complex neuropathy that affects retinal ganglion cells and is a leading cause of blindness worldwide. WDR36, a gene of unknown function, was recently identified as causative for POAG at locus GLC1G. Subsequent studies found disease-associated variants in control popu...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddn147

    authors: Skarie JM,Link BA

    更新日期:2008-08-15 00:00:00

  • In vivo function of the orphan nuclear receptor NR2E3 in establishing photoreceptor identity during mammalian retinal development.

    abstract::Rod and cone photoreceptors in mammalian retina are generated from common pool(s) of neuroepithelial progenitors. NRL, CRX and NR2E3 are key transcriptional regulators that control photoreceptor differentiation. Mutations in NR2E3, a rod-specific orphan nuclear receptor, lead to loss of rods, increased density of S-co...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddl185

    authors: Cheng H,Aleman TS,Cideciyan AV,Khanna R,Jacobson SG,Swaroop A

    更新日期:2006-09-01 00:00:00

  • A mutational hot spot in keratin 10 (KRT 10) in patients with epidermolytic hyperkeratosis.

    abstract::Epidermolytic hyperkeratosis (EHK), (bullous congenital ichthyosiform erythroderma), is an autosomal dominant human skin disorder. Recently, we and others have described mutations in keratins 1 and 10 (K1 and K10) in patients with this disease. Structure-function models predict that these mutations would impair normal...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/2.12.2147

    authors: Rothnagel JA,Fisher MP,Axtell SM,Pittelkow MR,Anton-Lamprecht I,Huber M,Hohl D,Roop DR

    更新日期:1993-12-01 00:00:00

  • Genetic mapping of a major susceptibility locus for juvenile myoclonic epilepsy on chromosome 15q.

    abstract::The epilepsies are a group of disorders characterised by recurrent seizures caused by episodes of abnormal neuronal hyperexcitability involving the brain. Up to 60 million people are affected worldwide and genetic factors may contribute to the aetiology in up to 40% of patients. The most common human genetic epilepsie...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/6.8.1329

    authors: Elmslie FV,Rees M,Williamson MP,Kerr M,Kjeldsen MJ,Pang KA,Sundqvist A,Friis ML,Chadwick D,Richens A,Covanis A,Santos M,Arzimanoglou A,Panayiotopoulos CP,Curtis D,Whitehouse WP,Gardiner RM

    更新日期:1997-08-01 00:00:00

  • Functional characterization of SIM1-associated enhancers.

    abstract::Haploinsufficiency of the single-minded homology 1 (SIM1) gene in humans and mice leads to severe obesity, suggesting that altered expression of SIM1, by way of regulatory elements such as enhancers, could predispose individuals to obesity. Here, we identified transcriptional enhancers that could regulate SIM1, using ...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddt559

    authors: Kim MJ,Oksenberg N,Hoffmann TJ,Vaisse C,Ahituv N

    更新日期:2014-04-01 00:00:00

  • Zebrafish cul4a, but not cul4b, modulates cardiac and forelimb development by upregulating tbx5a expression.

    abstract::CUL4A and CUL4B are closely related cullin family members and can each assemble a Cullin-RING E3 ligase complex (CRL) and participate in a variety of biological processes. While the CRLs formed by the two cullin members may have common targets, the two appeared to have very different consequences when mutated or disru...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddu503

    authors: Zhao X,Jiang B,Hu H,Mao F,Mi J,Li Z,Liu Q,Shao C,Gong Y

    更新日期:2015-02-01 00:00:00

  • NSDHL, an enzyme involved in cholesterol biosynthesis, traffics through the Golgi and accumulates on ER membranes and on the surface of lipid droplets.

    abstract::NSDHL, for NAD(P)H steroid dehydrogenase-like, encodes a sterol dehydrogenase or decarboxylase involved in the sequential removal of two C-4 methyl groups in post-squalene cholesterol biosynthesis. Mutations in this gene are associated with human CHILD syndrome (congenital hemidysplasia with ichthyosiform nevus and li...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddg321

    authors: Caldas H,Herman GE

    更新日期:2003-11-15 00:00:00

  • Mutations in the histamine N-methyltransferase gene, HNMT, are associated with nonsyndromic autosomal recessive intellectual disability.

    abstract::Histamine (HA) acts as a neurotransmitter in the brain, which participates in the regulation of many biological processes including inflammation, gastric acid secretion and neuromodulation. The enzyme histamine N-methyltransferase (HNMT) inactivates HA by transferring a methyl group from S-adenosyl-l-methionine to HA,...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/ddv286

    authors: Heidari A,Tongsook C,Najafipour R,Musante L,Vasli N,Garshasbi M,Hu H,Mittal K,McNaughton AJ,Sritharan K,Hudson M,Stehr H,Talebi S,Moradi M,Darvish H,Arshad Rafiq M,Mozhdehipanah H,Rashidinejad A,Samiei S,Ghadami M,

    更新日期:2015-10-15 00:00:00

  • Aggregation of N-terminal huntingtin is dependent on the length of its glutamine repeats.

    abstract::Huntington's disease (HD) is caused by expansion of a glutamine repeat in huntingtin. Mutant huntingtin contains 36-55 repeats in adult HD patients and >60 repeats in juvenile HD patients. An N-terminal fragment of mutant huntingtin forms aggregates in neuronal nuclei in the brains of transgenic mice and HD patients. ...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/7.5.777

    authors: Li SH,Li XJ

    更新日期:1998-05-01 00:00:00

  • Heterozygous inactivation of the Nf1 gene in myeloid cells enhances neointima formation via a rosuvastatin-sensitive cellular pathway.

    abstract::Mutations in the NF1 tumor suppressor gene cause Neurofibromatosis type 1 (NF1). Neurofibromin, the protein product of NF1, functions as a negative regulator of Ras activity. Some NF1 patients develop cardiovascular disease, which represents an underrecognized disease complication and contributes to excess morbidity a...

    journal_title:Human molecular genetics

    pub_type: 杂志文章

    doi:10.1093/hmg/dds502

    authors: Stansfield BK,Bessler WK,Mali R,Mund JA,Downing B,Li F,Sarchet KN,DiStasi MR,Conway SJ,Kapur R,Ingram DA Jr

    更新日期:2013-03-01 00:00:00