Abstract:
:Gamma glutamyl cysteine ligase (GCL) is the rate-limiting enzyme for intracellular glutathione (GSH) synthesis. The GSH concentration and GCL activity are declining with age in the central nervous system (CNS), and is accompanied by elevated reactive oxygen species (ROS). To study the biological effects of low GSH levels, we disrupted its synthesis both at birth by breeding a Gclc loxP mouse with a thy1-cre mouse (NEGSKO mouse) and at a later age by breeding with a CaMKII-ERT2-Cre (FIGSKO mouse). NEGSKO mice with deficiency of the Gclc in their entire CNS neuronal cells develop at 4 weeks: progressive motor neuron loss, gait problems, muscle denervation and atrophy, paralysis, and have diminished life expectancy. The observed neurodegeneration in Gclc deficiency is of more chronic rather than acute nature as demonstrated by Gclc targeted single-neuron labeling from the inducible Cre-mediated knockout (SLICK) mice. FIGSKO mice with inducible Gclc deficiency in the forebrain at 23 weeks after tamoxifen induction demonstrate profound brain atrophy, elevated astrogliosis and neurodegeneration, particularly in the hippocampus region. FIGSKO mice also develop cognitive abnormalities, i.e. learning impairment and nesting behaviors based on passive avoidance, T-Maze, and nesting behavior tests. Mechanistic studies show that impaired mitochondrial glutathione homeostasis and subsequent mitochondrial dysfunction are responsible for neuronal cell loss. This was confirmed by mitochondrial electron transporter chain activity analysis and transmission electron microscopy that demonstrate remarkable impairment of state 3 respiratory activity, impaired complex IV function, and mitochondrial swollen morphology in the hippocampus and cerebral cortex. These mouse genetic tools of oxidative stress open new insights into potential pharmacological control of apoptotic signaling pathways triggered by mitochondrial dysfunction.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Feng W,Rosca M,Fan Y,Hu Y,Feng P,Lee HG,Monnier VM,Fan Xdoi
10.1093/hmg/ddx040subject
Has Abstractpub_date
2017-04-01 00:00:00pages
1376-1390issue
7eissn
0964-6906issn
1460-2083pii
2965276journal_volume
26pub_type
杂志文章abstract::Multiple mitochondrial DNA deletions are associated with clinically heterogeneous disorders transmitted as mendelian traits. Dominant missense mutations were found in the gene encoding the heart and skeletal muscle-specific isoform of the adenine nucleotide translocator (ANT1) in families with autosomal dominant progr...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddi341
更新日期:2005-10-15 00:00:00
abstract::Hypertension is a complex disease that affects a large proportion of adult population. Although approximately half of the inter-individual variance in blood pressure (BP) level is heritable, identification of genes responsible for its regulation has remained challenging. Genome-wide association study (GWAS) is a novel...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddp135
更新日期:2009-06-15 00:00:00
abstract::The autosomal recessive mouse mutation retinal degeneration 6 (rd6) causes small, white retinal spots and progressive photoreceptor degeneration similar to that observed in human flecked retinal diseases. Using a positional cloning approach, we determined that rd6 mice carry a splice donor mutation in the mouse homolo...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/11.16.1879
更新日期:2002-08-01 00:00:00
abstract::Human GM1-gangliosidosis is caused by a genetic deficiency of lysosomal acid beta-galactosidase (beta-gal). The disease manifests itself either as an infantile, juvenile or adult form and is primarily a neurological disorder with progressive brain dysfunction. A mouse model lacking a functional beta-gal gene has been ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/6.2.205
更新日期:1997-02-01 00:00:00
abstract::An unresolved issue about many neurodegenerative diseases is why neurons are particularly sensitive to defects in ubiquitous cellular processes. One example is Niemann Pick type C1, caused by defects in cholesterol trafficking in all cells, but where neurons are preferentially damaged. Understanding this selective fai...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds090
更新日期:2012-06-15 00:00:00
abstract::Differential allelic expression has been shown to be common in mice, humans and maize, and variability in the expression of polymorphic alleles has been associated with human disease. Here, we describe the differential expression pattern of Paraoxonase-1, a gene involved in lipid metabolism and implicated in the forma...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddn222
更新日期:2008-11-01 00:00:00
abstract::An intronic GGGGCC (G4C2) hexanucleotide repeat expansion inC9orf72 is the most common genetic cause of amyotrophic lateral sclerosis and frontotemporal dementia (C9ALS/FTD). Repeat-associated non-AUG (RAN) translation of G4C2 RNA can result in five different dipeptide repeat proteins (DPR: poly GA, poly GP, poly GR, ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddx350
更新日期:2017-12-15 00:00:00
abstract::The autosomal dominant myopathy facioscapulohumeral muscular dystrophy (FSHD) is causally related to a short Eco RI fragment detected by probe p13E-11. This remnant fragment is the result of a deletion of an integral number of tandemly arrayed 3.3 kb repeat units (D4Z4) on 4q35. Despite intensive efforts, no transcrib...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/7.8.1207
更新日期:1998-08-01 00:00:00
abstract::Uromodulin (UMOD) mutations are responsible for three autosomal dominant tubulo-interstitial nephropathies including medullary cystic kidney disease type 2 (MCKD2), familial juvenile hyperuricemic nephropathy and glomerulocystic kidney disease. Symptoms include renal salt wasting, hyperuricemia, gout, hypertension and...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddq077
更新日期:2010-05-15 00:00:00
abstract::Paraoxonase is an arylesterase enzyme that is expressed in the liver and found in the circulation in association with apoA1 and the high-density lipoprotein, and prevents the accumulation of oxidized lipids in low-density lipoproteins in vitro. Common polymorphisms in genes encoding paraoxonase are established risk fa...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddi428
更新日期:2006-01-01 00:00:00
abstract::Huntington's disease (HD) and myotonic dystrophy (DM1) are caused by trinucleotide repeat expansions. The repeats show different instability patterns according to the disorder, cell type and developmental stage. Here we studied the behavior of these repeats in DM1- and HD-derived human embryonic stem cells (hESCs) bef...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddq456
更新日期:2011-01-01 00:00:00
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
更新日期:2011-01-15 00:00:00
abstract::We report the case of a consanguineous couple who lost four pregnancies associated with skeletal dysplasia. Radiological examination of one fetus was inconclusive. Parental exome sequencing showed that both parents were heterozygous for a novel missense variant, p.(Pro133Leu), in the SLC35D1 gene encoding a nucleotide...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddz200
更新日期:2019-11-01 00:00:00
abstract::Loss-of-function mutations of the X-chromosome gene UPF3B cause male neurodevelopmental disorders (NDDs) via largely unknown mechanisms. We investigated initially by interrogating a novel synonymous UPF3B variant in a male with absent speech. In silico and functional studies using cell lines derived from this individu...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddaa151
更新日期:2020-08-29 00:00:00
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...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/3.5.735
更新日期:1994-05-01 00:00:00
abstract::Spliceosomal Uridine-rich small ribonucleo protein (U snRNP) assembly is an active process mediated by the macromolecular survival motor neuron (SMN) complex. This complex contains the SMN protein and six additional proteins, named Gemin2-7, according to their localization to nuclear structures termed gems. Here, we p...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddi343
更新日期:2005-10-15 00:00:00
abstract::Autism spectrum disorder (ASD) is characterized by a triad of behavioural impairments including social behaviour. Neuroligin, a trans-synaptic adhesion molecule, has emerged as a penetrant genetic determinant of behavioural traits that signature the neuroatypical behaviours of autism. However, the function of neurolig...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddaa232
更新日期:2021-01-06 00:00:00
abstract::Supplementation with high doses of folic acid, an important mediator of one-carbon transfers for DNA methylation, is used clinically to improve sperm parameters in infertile men. We recently detected an unexpected loss of DNA methylation in the sperm of idiopathic infertile men after 6 months of daily supplementation ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy021
更新日期:2018-04-01 00:00:00
abstract::PLEC, the gene encoding the cytolinker protein plectin, has eight tissue-specific isoforms in humans, arising by alternate splicing of the first exon. To date, all PLEC mutations that cause epidermolysis bullosa simplex (EBS) were found in exons common to all isoforms. Due to the ubiquitous presence of plectin in mamm...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddv066
更新日期:2015-06-01 00:00:00
abstract::We report identification of a novel genetic locus (GLC1P) for normal tension glaucoma (NTG) on chromosome 12q14 using linkage studies of an African-American pedigree (maximum non-parametric linkage score = 19.7, max LOD score = 2.7). Subsequent comparative genomic hybridization and quantitative polymerase chain reacti...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddr123
更新日期:2011-06-15 00:00:00
abstract::Mucolipidosis IV (MLIV) is an orphan neurodevelopmental disease that causes severe neurologic dysfunction and loss of vision. Currently there is no therapy for MLIV. It is caused by loss of function of the lysosomal channel mucolipin-1, also known as TRPML1. Knockout of the Mcoln1 gene in a mouse model mirrors clinica...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy182
更新日期:2018-08-01 00:00:00
abstract::Polycystin-1 (PC1), encoded by the PKD1 gene that is mutated in the autosomal dominant polycystic kidney disease, regulates a number of processes including bone development. Activity of the transcription factor RunX2, which controls osteoblast differentiation, is reduced in Pkd1 mutant mice but the mechanism governing...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy322
更新日期:2019-01-01 00:00:00
abstract::Chromosomal aneuploidy, the gain or loss of whole chromosomes, is a hallmark of pathological conditions and a causal factor of birth defects and cancer. A number of studies indicate that aneuploid cells are present at a high frequency in the brain of mice and humans, suggesting that mosaic aneuploidies are compatible ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds375
更新日期:2012-12-15 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
更新日期:1992-05-01 00:00:00
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
更新日期:2011-06-15 00:00:00
abstract::Aiming to identify novel genetic variants and to confirm previously identified genetic variants associated with bone mineral density (BMD), we conducted a three-stage genome-wide association (GWA) meta-analysis in 27 061 study subjects. Stage 1 meta-analyzed seven GWA samples and 11 140 subjects for BMDs at the lumbar...
journal_title:Human molecular genetics
pub_type: 杂志文章,meta分析
doi:10.1093/hmg/ddt575
更新日期:2014-04-01 00:00:00
abstract::CREB-binding protein (CBP, CREBBP, KAT3A) and its closely related paralogue p300 (EP300, KAT3B), together termed p300/CBP, are histone/lysine acetyl-transferases that control gene expression by modifying chromatin-associated proteins. Here, we report roles for both of these chromatin-modifying enzymes in mouse sex det...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddx398
更新日期:2018-01-01 00:00:00
abstract::Although genetic variations in several genes encoding for synaptic adhesion proteins have been found to be associated with autism spectrum disorders, one of the most consistently replicated genes has been CNTNAP2, encoding for contactin-associated protein-like 2 (CASPR2), a multidomain transmembrane protein of the neu...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds320
更新日期:2012-11-01 00:00:00
abstract::Superovulation or ovarian stimulation is currently an indispensable assisted reproductive technology (ART) for human subfertility/infertility treatment. Recently, increased frequencies of imprinting disorders have been correlated with ARTs. Significantly, for Angelman and Beckwith-Wiedemann Syndromes, patients have be...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddp465
更新日期:2010-01-01 00:00:00
abstract::In humans, poor nutrition, malabsorption and variation in cobalamin (vitamin B12) metabolic genes are associated with hematological, neurological and developmental pathologies. Cobalamin is transported from blood into tissues via the transcobalamin (TC) receptor encoded by the CD320 gene. We created mice carrying a ta...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy267
更新日期:2018-10-15 00:00:00