Abstract:
:The adaptor protein-2 sigma subunit (AP2σ2) is pivotal for clathrin-mediated endocytosis of plasma membrane constituents such as the calcium-sensing receptor (CaSR). Mutations of the AP2σ2 Arg15 residue result in familial hypocalciuric hypercalcaemia type 3 (FHH3), a disorder of extracellular calcium (Ca(2+) o) homeostasis. To elucidate the role of AP2σ2 in Ca(2+) o regulation, we investigated 65 FHH probands, without other FHH-associated mutations, for AP2σ2 mutations, characterized their functional consequences and investigated the genetic mechanisms leading to FHH3. AP2σ2 mutations were identified in 17 probands, comprising 5 Arg15Cys, 4 Arg15His and 8 Arg15Leu mutations. A genotype-phenotype correlation was observed with the Arg15Leu mutation leading to marked hypercalcaemia. FHH3 probands harboured additional phenotypes such as cognitive dysfunction. All three FHH3-causing AP2σ2 mutations impaired CaSR signal transduction in a dominant-negative manner. Mutational bias was observed at the AP2σ2 Arg15 residue as other predicted missense substitutions (Arg15Gly, Arg15Pro and Arg15Ser), which also caused CaSR loss-of-function, were not detected in FHH probands, and these mutations were found to reduce the numbers of CaSR-expressing cells. FHH3 probands had significantly greater serum calcium (sCa) and magnesium (sMg) concentrations with reduced urinary calcium to creatinine clearance ratios (CCCR) in comparison with FHH1 probands with CaSR mutations, and a calculated index of sCa × sMg/100 × CCCR, which was ≥ 5.0, had a diagnostic sensitivity and specificity of 83 and 86%, respectively, for FHH3. Thus, our studies demonstrate AP2σ2 mutations to result in a more severe FHH phenotype with genotype-phenotype correlations, and a dominant-negative mechanism of action with mutational bias at the Arg15 residue.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Hannan FM,Howles SA,Rogers A,Cranston T,Gorvin CM,Babinsky VN,Reed AA,Thakker CE,Bockenhauer D,Brown RS,Connell JM,Cook J,Darzy K,Ehtisham S,Graham U,Hulse T,Hunter SJ,Izatt L,Kumar D,McKenna MJ,McKnight JA,Morrdoi
10.1093/hmg/ddv226subject
Has Abstractpub_date
2015-09-15 00:00:00pages
5079-92issue
18eissn
0964-6906issn
1460-2083pii
ddv226journal_volume
24pub_type
杂志文章abstract::The Vesicle-associated membrane protein (VAMP)-Associated Protein B (VAPB) is the causative gene of amyotrophic lateral sclerosis 8 (ALS8) in humans. Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease characterized by selective death of motor neurons leading to spasticity, muscle atrophy an...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddt118
更新日期:2013-07-01 00:00:00
abstract::The gene which is defective in Duchenne muscular dystrophy (DMD) is the largest known gene. The product of the gene in muscle, dystrophin, is a 427 kDa protein. The same gene encodes at least six additional products: two non-muscle dystrophin isoforms transcribed from promoters located in the 5'-end region of the gene...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/7.4.581
更新日期:1998-04-01 00:00:00
abstract::We examined the imprinting status of the insulin-like growth factor II gene (IGF2) in a series of 20 human breast disease samples to determine if disrupted imprinting (as evidenced by biallelic expression), was a demonstrable mechanism of altered gene expression. These samples included benign (n = 7) and malignant bre...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/5.8.1123
更新日期:1996-08-01 00:00:00
abstract::Genetic and environmental influences are thought to interact in their contribution to the etiology of major neuropsychiatric disorders. One of the best replicated findings obtained in genome-wide association studies are genetic variants in the CACNA1C gene. Here, we used our constitutive heterozygous Cacna1c rat model...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddz235
更新日期:2019-12-15 00:00:00
abstract::Splice modulation therapy has shown great clinical promise in Duchenne muscular dystrophy, resulting in the production of dystrophin protein. Despite this, the relationship between restoring dystrophin to established dystrophic muscle and its ability to induce clinically relevant changes in muscle function is poorly u...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddv155
更新日期:2015-08-01 00:00:00
abstract::PLEKHA7, a gene recently associated with primary angle closure glaucoma (PACG), encodes an apical junctional protein expressed in components of the blood aqueous barrier (BAB). We found that PLEKHA7 is down-regulated in lens epithelial cells and in iris tissue of PACG patients. PLEKHA7 expression also correlated with ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddx292
更新日期:2017-10-15 00:00:00
abstract::Lysosomal storage diseases are due to inherited deficiencies in various enzymes involved in basic metabolic processes. As with other genetic diseases, accurate structure data for these enzymatic proteins should help in better understanding the molecular effects of mutations identified in patients with the correspondin...
journal_title:Human molecular genetics
pub_type: 杂志文章,评审
doi:10.1093/hmg/9.6.967
更新日期:2000-04-12 00:00:00
abstract::Systemic sclerosis (SSc) is complex autoimmune disease affecting the connective tissue; influenced by genetic and environmental components. Recently, we performed the first successful genome-wide association study (GWAS) of SSc. Here, we perform a large replication study to better dissect the genetic component of SSc....
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds099
更新日期:2012-06-15 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::Spinal and bulbar muscular atrophy (SBMA) is an X-linked motoneuron disease due to a CAG triplet-repeat expansion in the androgen receptor (AR) gene, which is translated into an elongated polyglutamine (polyQ) tract in AR protein (ARpolyQ). ARpolyQ toxicity is activated by the AR ligand testosterone (or dihydrotestost...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddu419
更新日期:2015-01-01 00:00:00
abstract::Rheumatoid arthritis (RA) is the commonest chronic, systemic, inflammatory disorder affecting ∼1% of the world population. It has a strong genetic component and a growing number of associated genes have been discovered in genome-wide association studies (GWAS), which nevertheless only account for 23% of the total gene...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddr248
更新日期:2011-09-01 00:00:00
abstract::Nicotine is thought to act on brain monoamine systems that normally mediate diverse motivational behaviors. How monoamine-related genes contribute to behavioral traits (e.g. responses to novel stimuli) comorbid with the susceptibility to nicotine addiction is still poorly understood. We examined the impact of constitu...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddl206
更新日期:2006-09-15 00:00:00
abstract::Apolipoprotein-E (apoE) protects against coronary artery disease via hepatic removal of atherogenic remnant lipoproteins, sequestration of cholesterol from vessel walls and local anti-oxidant, anti-platelet and anti-inflammatory actions. ApoE gene transfer may thus ameliorate a hyperlipidaemic profile and have benefic...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/9.17.2545
更新日期:2000-10-12 00:00:00
abstract::Bone mineral density (BMD) is one of the major determinants of risk for osteoporotic fracture. Multiple studies reveal that peak bone mass is under strong genetic influence. One of the major susceptibility loci for peak spine BMD has been mapped to chromosome 1q21-q23 in the Caucasian population. We have previously re...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddn397
更新日期:2009-02-15 00:00:00
abstract::Aminoacyl-tRNA synthetases (ARSs) are ubiquitously expressed enzymes implicated in several dominant and recessive disease phenotypes. The canonical function of ARSs is to couple an amino acid to a cognate transfer RNA (tRNA). We identified three novel disease-associated missense mutations in the alanyl-tRNA synthetase...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy290
更新日期:2018-12-01 00:00:00
abstract::Expansion of a polyglutamine tract in ataxin-3 (AT3) results in spinocerebellar ataxia type 3/Machado-Joseph disease, one of the nine polyglutamine neurodegenerative diseases. Understanding the normal functions of AT3 as well as its function in the context of expansion of the polyglutamine tract is critical for unders...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddl164
更新日期:2006-08-15 00:00:00
abstract::Mutations in PKD1 cause dominant polycystic kidney disease (PKD), characterized by large fluid-filled kidney cysts in adult life, but the molecular mechanism of cystogenesis remains obscure. Ostrom et al. [Dev. Biol., 219, 250-258 (2000)] showed that reduced dosage of Pax2 caused increased apoptosis, and ameliorated c...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddl428
更新日期:2006-12-15 00:00:00
abstract::Induced pluripotent stem cell (iPSC)-derived cortical neurons potentially present a powerful new model to understand corticogenesis and neurological disease. Previous work has established that differentiation protocols can produce cortical neurons, but little has been done to characterize these at cellular resolution....
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddv637
更新日期:2016-03-01 00:00:00
abstract::Genetics of Holoprosencephaly (HPE), a congenital malformation of the developing human forebrain, is due to multiple genetic defects. Most genes that have been implicated in HPE belong to the sonic hedgehog signaling pathway. Here we describe a new candidate gene isolated from array comparative genomic hybridization r...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddq556
更新日期:2011-03-15 00:00:00
abstract::The von Hippel-Lindau (VHL) tumour suppressorgene product is believed to be involved in the down-regulation of transcriptional elongation by preventing the association of elongin B and C with the catalytic subunit elongin A. Alterations in the human VHL gene lead to VHL disease which is associated with various rare ne...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/8.2.229
更新日期:1999-02-01 00:00:00
abstract::Beckwith-Wiedemann syndrome (BWS) is an overgrowth malformation syndrome that maps to human chromosome 11p15.5, a region that harbours a number of imprinted genes. We studied the methylation status of H19 and KCNQ1OT1 (LIT1/KvDMR1) in a large series of BWS patients. Different patient groups were identified: group I pa...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/10.5.467
更新日期:2001-03-01 00:00:00
abstract::Malignant hyperthermia susceptibility (MHS) is an autosomal dominant disorder of skeletal muscle which manifests as a life-threatening hypermetabolic crisis triggered by commonly-used inhalation anaesthetics and depolarizing muscle relaxants. Defects in the ryanodine receptor (RYR1) protein have been proposed to under...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/2.7.863
更新日期:1993-07-01 00:00:00
abstract::One mechanism by which endogenous microRNAs (miRNAs) function is to suppress translation of target mRNAs. Computational identification of target mRNAs is hampered by the partial complementarity between miRNAs and their targets and the lack of in vivo approaches to identify targets. Here, we identify mRNAs that are reg...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddi397
更新日期:2005-12-15 00:00:00
abstract::Selenoprotein N (SelN) deficiency causes a group of inherited neuromuscular disorders termed SEPN1-related myopathies (SEPN1-RM). Although the function of SelN remains unknown, recent data demonstrated that it is dispensable for mouse embryogenesis and suggested its involvement in the regulation of ryanodine receptors...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddq515
更新日期:2011-02-15 00:00:00
abstract::While the presence of a lipoyl-containing protein (protein X) separate from lipoyl transacetylase in the pyruvate dehydrogenase complex (PDC) has been known for some time, until recently only the cDNA for the yeast enzyme has been cloned. We have cloned, sequenced and characterized the cDNA encoding the human protein ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/7.3.501
更新日期:1998-03-01 00:00:00
abstract::The expansion of CAG.CTG trinucleotide repeats has been associated with an increasing number of human diseases. Once into the expanded disease-associated range, the repeats become dramatically unstable in the germline and also throughout the soma. Instability is expansion-biased, contributing towards the unusual genet...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/10.8.845
更新日期:2001-04-01 00:00:00
abstract::Mutations in the human PAX6 gene produce various phenotypes, including aniridia, Peters' anomaly, autosomal dominant keratitis and familial foveal dysplasia. The various phenotypes may arise from different mutations in the same gene. To test this theory, we performed a functional analysis of two missense mutations in ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/6.3.381
更新日期:1997-03-01 00:00:00
abstract::Identifying the causes of high fever syndromes such as Kawasaki disease (KD) remains challenging. To investigate pathogen exposure signatures in suspected pathogen-mediated diseases such as KD, we performed immunoglobulin (Ig) profiling using a next-generation sequencing method. After intravenous Ig (IVIG) treatment, ...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/ddy176
更新日期:2018-08-01 00:00:00
abstract::Hirschsprung disease (HSCR) is a frequent neurocristopathy characterized by the absence of submucosal and myenteric plexuses in a variable length of the gastrointestinal tract. Pedigrees and segregation analyses suggested the involvement of one or several dominant genes with low penetrance in HSCR. Considering that RE...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/7.9.1449
更新日期:1998-09-01 00:00:00
abstract::Mutations in PARK8, encoding leucine-rich repeat kinase 2 (LRRK2), are a frequent cause of Parkinson's disease (PD). Nonetheless, the physiological role of LRRK2 remains unclear. Here, we demonstrate that LRRK2 participates in canonical Wnt signaling as a scaffold. LRRK2 interacts with key Wnt signaling proteins of th...
journal_title:Human molecular genetics
pub_type: 杂志文章
doi:10.1093/hmg/dds342
更新日期:2012-11-15 00:00:00