Abstract:
:We previously showed that disruptive complex I mutations in mitochondrial DNA are the main genetic hallmark of oncocytic tumors of the thyroid and kidney. We here report a high frequency of homoplasmic disruptive mutations in a large panel of oncocytic pituitary and head-and-neck tumors. The presence of such mutations implicates disassembly of respiratory complex I in vivo which in turn contributes to the inability of oncocytic tumors to stabilize HIF1alpha and to display pseudo-hypoxia. By utilizing transmitochondrial cytoplasmic hybrids (cybrids), we induced the shift to homoplasmy of a truncating mutation in the mitochondria-coded MTND1 gene. Such shift is associated with a profound metabolic impairment leading to the imbalance of alpha-ketoglutarate and succinate, the Krebs cycle metabolites which are the main responsible for HIF1alpha stabilization. We conclude that the main hallmarks of oncocytic transformation, namely the occurrence of homoplasmic disruptive mutations and complex I disassembly, may explain the benign nature of oncocytic neoplasms through lack of HIF1alpha stabilization.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Porcelli AM,Ghelli A,Ceccarelli C,Lang M,Cenacchi G,Capristo M,Pennisi LF,Morra I,Ciccarelli E,Melcarne A,Bartoletti-Stella A,Salfi N,Tallini G,Martinuzzi A,Carelli V,Attimonelli M,Rugolo M,Romeo G,Gasparre Gdoi
10.1093/hmg/ddp566subject
Has Abstractpub_date
2010-03-15 00:00:00pages
1019-32issue
6eissn
0964-6906issn
1460-2083pii
ddp566journal_volume
19pub_type
杂志文章abstract::Melanomas contain high frequencies of tumorigenic cells and their tumorigenic capacity resides in several distinct subpopulations within melanoma. Since their metastatic potential is linked to their ability to recruit lymphatic vessels, we aimed at identifying lymphangiogenic subpopulations by comparative in vitro ana...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds171
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abstract::Ketosis-prone diabetes (KPD) is a rare form of type 2 diabetes, mostly observed in subjects of west African origin (west Africans and African-Americans), characterized by fulminant and phasic insulin dependence, but lacking markers of autoimmunity observed in type 1 diabetes. PAX4 is a transcription factor essential f...
journal_title:Human molecular genetics
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doi:10.1093/hmg/ddh341
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abstract::Proteolytic fragmentation of polyglutamine-expanded ataxin-3 is a concomitant and modifier of the molecular pathogenesis of Machado-Joseph disease (MJD), the most common autosomal dominant cerebellar ataxia. Calpains, a group of calcium-dependent cysteine proteases, are important mediators of ataxin-3 cleavage and imp...
journal_title:Human molecular genetics
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journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddx110
更新日期:2017-06-15 00:00:00
abstract::Beside the well-known polyglutamine expansions involved in several neurodegenerative disorders, convergent recent findings pointed to the expansion of polyalanine stretches as a disease mechanism in congenital malformations, skeletal dysplasia and nervous system anomalies. Polyalanine stretches have been predicted in ...
journal_title:Human molecular genetics
pub_type: 杂志文章,评审
doi:10.1093/hmg/ddh251
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abstract::The members of the huntingtin-interacting protein-1 (HIP1) family, HIP1 and HIP1-related (HIP1r), are multi-domain proteins that interact with inositol lipids, clathrin and actin. HIP1 is over-expressed in a variety of cancers and both HIP1 and HIP1r prolong the half-life of multiple growth factor receptors. To better...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddm076
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journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/9.18.2715
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abstract::Several known or putative glycosyltransferases are required for the synthesis of laminin-binding glycans on alpha-dystroglycan (αDG), including POMT1, POMT2, POMGnT1, LARGE, Fukutin, FKRP, ISPD and GTDC2. Mutations in these glycosyltransferase genes result in defective αDG glycosylation and reduced ligand binding by α...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddt021
更新日期:2013-05-01 00:00:00
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journal_title:Human molecular genetics
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abstract::Fragile X Syndrome (FXS) is a learning disability seen in individuals who have >200 CGG•CCG repeats in the 5' untranslated region of the X-linked FMR1 gene. Such alleles are associated with a fragile site, FRAXA, a gap or constriction in the chromosome that is coincident with the repeat and is induced by folate stress...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddu006
更新日期:2014-06-01 00:00:00
abstract::Parkinson disease (PD) is the second most common neurodegenerative disorder. We studied 754 affected individuals, comprising 425 sibling pairs, to identify PD susceptibility genes. Screening of the parkin gene was performed in a subset of the sample having earlier age of PD onset or a positive LOD score with a marker ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddg270
更新日期:2003-10-15 00:00:00
abstract::Although hundreds of genome-wide association studies-implicated loci have been reported for adult obesity-related traits, less is known about the genetics specific for early-onset obesity and with only a few studies conducted in non-European populations to date. Searching for additional genetic variants associated wit...
journal_title:Human molecular genetics
pub_type: 杂志文章,meta分析
doi:10.1093/hmg/ddz161
更新日期:2019-10-01 00:00:00
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journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddn156
更新日期:2008-08-15 00:00:00
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...
journal_title:Human molecular genetics
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doi:10.1093/hmg/ddq453
更新日期:2011-01-01 00:00:00
abstract::According to the telomere hypothesis of senescence, the progressive shortening of telomeres that occurs upon division of normal somatic cells eventually leads to cellular senescence. The immortalisation of human cells is associated with the acquisition of a telomere maintenance mechanism which is usually dependent upo...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/6.6.921
更新日期:1997-06-01 00:00:00
abstract::Spinal muscular atrophy (SMA), a frequent neurodegenerative disease, is caused by reduced levels of functional survival of motoneuron (SMN) protein. SMN is involved in multiple pathways, including RNA metabolism and splicing as well as motoneuron development and function. Here we provide evidence for a major contribut...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddr425
更新日期:2011-12-15 00:00:00
abstract::Facio-scapulo-humeral dystrophy (FSHD) results from deletions in the subtelomeric macrosatellite D4Z4 array on the 4q35 region. Upregulation of the DUX4 retrogene from the last D4Z4 repeated unit is thought to underlie FSHD pathophysiology. However, no one knows what triggers muscle defect and when alteration arises. ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddt272
更新日期:2013-10-15 00:00:00
abstract::An amphibian homologue of the human cystic fibrosis transmembrane conductance regulator (CFTR) gene has been isolated from Xenopus laevis by polymerase chain reaction (PCR) amplification. The 4455bp sequence encodes a predicted polypeptide of 1485 amino acids which has an overall homology at the amino acid level of 77...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/1.2.77
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abstract::Ataxia oculomotor apraxia type 1 (AOA1) is an autosomal recessive disease caused by mutations in APTX, which encodes the DNA strand-break repair protein aprataxin (APTX). CoQ10 deficiency has been identified in fibroblasts and muscle of AOA1 patients carrying the common W279X mutation, and aprataxin has been localized...
journal_title:Human molecular genetics
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journal_title:Human molecular genetics
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doi:10.1093/hmg/ddt479
更新日期:2014-02-15 00:00:00
abstract::We investigated the population differences in patterns of single nucleotide polymorphisms (SNPs) for a 400 kb olfactory receptor (OR) gene cluster on human chromosome 17p13.3. Samples were drawn from 35 individuals, of four different ethnogeographical origins: Pygmies, Bedouins, Yemenite Jews and Ashkenazi Jews. Of th...
journal_title:Human molecular genetics
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abstract::Recent genome-wide association studies (GWAS) and subsequent meta-analyses have identified over 25 SNPs at 18 loci, together accounting for >15% of the genetic susceptibility to testicular germ cell tumour (TGCT). To identify further common SNPs associated with TGCT, here we report a three-stage experiment, involving ...
journal_title:Human molecular genetics
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更新日期:2015-02-15 00:00:00
abstract::Marfan syndrome is an autosomal dominant disorder mainly caused by mutations within FBN1 gene. The disease displays large variability in age of onset or severity and very poor phenotype/genotype correlations have been demonstrated. We investigated the hypothesis that phenotype severity could be related to the variable...
journal_title:Human molecular genetics
pub_type: 杂志文章
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abstract::Degenerate primer pairs that include consensus sequences of evolutionary conserved portions of protein families (BLOCKs or ancient conserved regions) can be used to screen by polymerase chain reaction (PCR) for cognate cDNAs and YACs through much of phylogeny. Nine such primer pairs were developed, and five with sites...
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pub_type: 杂志文章
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journal_title:Human molecular genetics
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journal_title:Human molecular genetics
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abstract::Poly(ADP-ribose) polymerase 2 (PARP-2) is a newly discovered member of the PARP family. We report the association of PARP-2 with mammalian centromeres in a cell-cycle-dependent manner, accumulating at centromeres during prometaphase and metaphase, disassociating during anaphase, and disappearing from the centromeres b...
journal_title:Human molecular genetics
pub_type: 杂志文章
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