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Nolan D, Castley A, Tschochner M, James I, Qiu W, Sayer D, Christiansen FT, Witt C, Mastaglia F, Carroll W, Kermode A. Contributions of vitamin D response elements and HLA promoters to multiple sclerosis risk. Neurology 2012; 79:538-46. [DOI: 10.1212/wnl.0b013e318263c407] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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2
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Rodrigues J, Walters S, Stell R, Mastaglia F, Thickbroom G. Spike-timing related plasticity is preserved in parkinson's disease and is enhanced by dopamine: evidence from transcranial magnetic stimulation. Brain Stimul 2008. [DOI: 10.1016/j.brs.2008.06.244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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3
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Needham M, Corbett A, Day T, Fabian V, Mastaglia F. G.P.13.07 Prevalence and diagnosis of sporadic inclusion body myositis (sIBM) in Western Australia. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Needham M, Corbett A, Day T, Mastaglia F. G.P.13.06 Sporadic inclusion body myositis (sIBM): A phenotypic spectrum in a cohort of 57 cases. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Price P, Santoso L, Mastaglia F, Garlepp M, Kok CC, Allcock R, Laing N. Two major histocompatibility complex haplotypes influence susceptibility to sporadic inclusion body myositis: critical evaluation of an association with HLA-DR3. ACTA ACUST UNITED AC 2005; 64:575-80. [PMID: 15496200 DOI: 10.1111/j.1399-0039.2004.00310.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Previous studies of sporadic inclusion body myositis (sIBM) have shown a strong association with HLA-DR3 and other components of the 8.1 ancestral haplotype (AH) (HLA-A1, B8, DR3), where the susceptibility locus has been mapped to the central major histocompatibility complex (MHC) region between HLA-DR and C4. Here, the association with HLA-DR3 and other genes in the central MHC and class II region was further investigated in a group of 42 sIBM patients and in an ethnically similar control group (n = 214), using single-nucleotide polymorphisms and microsatellite screening. HLA-DR3 (marking DRB1*0301 in Caucasians) was associated with sIBM (Fisher's test). However, among HLA-DR3-positive patients and controls, carriage of HLA-DR3 without microsatellite and single-nucleotide polymorphism alleles of the 8.1AH (HLA-A1, B8, DRB3*0101, DRB1*0301, DQB1*0201) was marginally less common in patients. Patients showed no increase in carriage of the 18.2AH (HLA-A30, B18, DRB3*0202, DRB1*0301, DQB1*0201) or HLA-DR3 without the central MHC of the 8.1AH, further arguing against HLA-DRB1 as the direct cause of susceptibility. Genes between HLA-DRB1 and HOX12 require further investigation. BTL-II lies in this region and is expressed in muscle. Carriage of allele 2 (exon 6) was more common in patients. BTL-II(E6)*2 is characteristic of the 35.2AH (HLA-A3, B35, DRB1*01) in Caucasians and HLA-DR1, BTL-II(E6)*2, HOX12*2, RAGE*2 was carried by several patients. The 8.1AH and 35.2AH may confer susceptibility to sIBM independently or share a critical allele.
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Affiliation(s)
- P Price
- School of Surgery and Pathology, University of Western Australia, Nedlands, Australia.
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6
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Li YJ, Hauser MA, Scott WK, Martin ER, Booze MW, Qin XJ, Walter JW, Nance MA, Hubble JP, Koller WC, Pahwa R, Stern MB, Hiner BC, Jankovic J, Goetz CG, Small GW, Mastaglia F, Haines JL, Pericak-Vance MA, Vance JM. Apolipoprotein E controls the risk and age at onset of Parkinson disease. Neurology 2004; 62:2005-9. [PMID: 15184605 DOI: 10.1212/01.wnl.0000128089.53030.ac] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Similarities between Alzheimer disease (AD) and Parkinson disease (PD) suggest a possible role for apolipoprotein E (APOE) in PD. Most previous studies seeking to establish such a link used case-control datasets and results have been inconsistent. OBJECTIVE To investigate APOE's role in PD using family-based association analyses. METHODS APOE functional polymorphisms were genotyped for 658 PD affected families, including 282 multiplex and 376 singleton families. The pedigree disequilibrium test (PDT) and the genotype-PDT were used to test the risk effect of APOE. The Monks-Kaplan test was used to evaluate the effect of APOE on age at onset of PD. RESULTS APOE was significantly associated with risk of developing PD. Stratified analysis revealed that APOE was most strongly associated with families with a positive PD family history (global p = 0.003). Like AD, the APOE-4 allele increases disease risk while the APOE-3 allele decreases risk. We detected a positive association of APOE-3 (p = 0.019) and a negative association of APOE-4 (p = 0.015) with age at onset in PD. CONCLUSIONS The APOE-4 allele increases risk and decreases age at onset of PD, an association that may not be dependent upon cognitive impairment.
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Affiliation(s)
- Y J Li
- Department of Medicine and Center for Human Genetics, Duke University Medical Center, Durham, NC 27710, USA.
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7
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Matteelli A, Gori A, Pinsi G, El-Hamad I, Bombana E, Mastaglia F, Degli Esposti A, Bandera A, Tedoldi S, Casalini C, Scolari C, Carvalho ACC, Carosi G. Clustering of tuberculosis among senegalese immigrants in Italy. Int J Tuberc Lung Dis 2003; 7:967-72. [PMID: 14552567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
OBJECTIVE To study clustered Mycobacterium tuberculosis isolates as an indicator of recent TB transmission in a small urban setting in Italy, and to determine associated risk factors. METHODS M. tuberculosis strains isolated between 1991 and 1997 were characterised by IS6110 restriction fragment length polymorphism (RFLP) analysis. RESULTS One hundred and ninety-five isolates were available for RFLP analysis, which revealed 163 different patterns. Available cases were represented by 137 Italians (70%), 32 Senegalese (17%), and 26 other foreign-born cases (13%). A unique fingerprint pattern was found in 143 cases (73.3%), while 52 strains (26.7%) were grouped into 20 clusters. Nineteen cases (10%) were resident in the same quarter of Brescia with a high density of Senegalese immigrants (Area A). An increased probability of yielding clustered M. tuberculosis strains was associated with residence in Area A (OR 3.87, 95%CI 1.42-10.56; P = 0.02) and being Senegalese (OR = 5.96, 95%CI 1.48-23.97; P = 0.005). In the logistic regression analysis, being Senegalese was independently associated with yielding a clustered M. tuberculosis strain. CONCLUSIONS Our results demonstrate a clustering of TB cases among Senegalese immigrants and suggest that RFLP analysis may be used to identify geographical areas where efforts can be targeted to interrupt TB transmission.
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Affiliation(s)
- A Matteelli
- Department of Infectious Diseases, Institute of Infectious Diseases, Brescia, Italy.
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8
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Gommans IMP, Davis M, Saar K, Lammens M, Mastaglia F, Lamont P, van Duijnhoven G, ter Laak HJ, Reis A, Vogels OJM, Laing N, van Engelen BGM, Kremer H. A locus on chromosome 15q for a dominantly inherited nemaline myopathy with core-like lesions. Brain 2003; 126:1545-51. [PMID: 12805120 DOI: 10.1093/brain/awg162] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Nemaline myopathy is a congenital neuromuscular disorder characterized by muscle weakness and the presence of nemaline rods. Five genes have now been associated with nemaline myopathy: alpha-tropomyosin-3 (TPM3), alpha-actin (ACTA1), nebulin (NEB), beta-tropomysin (TPM2) and troponin T (TNNT1). In addition, mutations in the ryanodine receptor gene (RYR1) have been associated with core-rod myopathy. Here we report linkage in two unrelated families, with a variant of nemaline myopathy, with associated core-like lesions. The clinical phenotype consists of muscle weakness in addition to a peculiar kind of muscle slowness. A genome-wide scan revealed a locus for nemaline myopathy with core-like lesions on chromosome 15q21-q23 for both families. Combining the two families gave a two-point LOD score of 10.65 for D15S993. The alpha-tropomyosin-1 gene (TPM1) located within this region is the strongest candidate gene. However, no mutations were found in the protein-coding region of TPM1, although small deletions or mutations in an intron cannot be excluded. The critical region contains few other candidate genes coding for muscle proteins and several genes of unknown function, and has not yet been sequenced completely. The novel phenotype of nemaline myopathy in the two presented families corresponds to an also novel, as yet uncharacterized, genotype.
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Affiliation(s)
- I M P Gommans
- Neuromuscular Centre, Nijmegen Institute of Neurology, University Medical Center Nijmegen, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands.
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van der Walt JM, Martin ER, Scott WK, Zhang F, Nance MA, Watts RL, Hubble JP, Haines JL, Koller WC, Lyons K, Pahwa R, Stern MB, Colcher A, Hiner BC, Jankovic J, Ondo WG, Allen FH, Goetz CG, Small GW, Mastaglia F, Roses AD, Stajich JM, Booze MW, Fujiwara K, Gibson RA, Middleton LT, Scott BL, Pericak-Vance MA, Vance JM. Genetic polymorphisms of the N-acetyltransferase genes and risk of Parkinson's disease. Neurology 2003; 60:1189-91. [PMID: 12682333 DOI: 10.1212/01.wnl.0000055929.84668.9a] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Recently, the authors demonstrated linkage in idiopathic PD to a region on chromosome 8p that contains the N-acetyltransferase genes, NAT1 and NAT2. The authors examined NAT1 and NAT2 for association with PD using family-based association methods and single nucleotide polymorphisms (SNPs). The authors did not find evidence for association with increased risk for PD between any individual NAT1 or NAT2 SNP or acetylation haplotype (N = 397 families, 1,580 individuals).
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Affiliation(s)
- J M van der Walt
- Department of Medicine and Center for Human Genetics, Institute for Genome Sciences and Policy, Duke University Medical Center, Durham, NC 27710, USA
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Scott WK, Nance MA, Watts RL, Hubble JP, Koller WC, Lyons K, Pahwa R, Stern MB, Colcher A, Hiner BC, Jankovic J, Ondo WG, Allen FH, Goetz CG, Small GW, Masterman D, Mastaglia F, Laing NG, Stajich JM, Slotterbeck B, Booze MW, Ribble RC, Rampersaud E, West SG, Gibson RA, Middleton LT, Roses AD, Haines JL, Scott BL, Vance JM, Pericak-Vance MA. Complete genomic screen in Parkinson disease: evidence for multiple genes. JAMA 2001; 286:2239-44. [PMID: 11710888 DOI: 10.1001/jama.286.18.2239] [Citation(s) in RCA: 211] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
CONTEXT The relative contribution of genes vs environment in idiopathic Parkinson disease (PD) is controversial. Although genetic studies have identified 2 genes in which mutations cause rare single-gene variants of PD and observational studies have suggested a genetic component, twin studies have suggested that little genetic contribution exists in the common forms of PD. OBJECTIVE To identify genetic risk factors for idiopathic PD. DESIGN, SETTING, AND PARTICIPANTS Genetic linkage study conducted 1995-2000 in which a complete genomic screen (n = 344 markers) was performed in 174 families with multiple individuals diagnosed as having idiopathic PD, identified through probands in 13 clinic populations in the continental United States and Australia. A total of 870 family members were studied: 378 diagnosed as having PD, 379 unaffected by PD, and 113 with unclear status. MAIN OUTCOME MEASURES Logarithm of odds (lod) scores generated from parametric and nonparametric genetic linkage analysis. RESULTS Two-point parametric maximum parametric lod score (MLOD) and multipoint nonparametric lod score (LOD) linkage analysis detected significant evidence for linkage to 5 distinct chromosomal regions: chromosome 6 in the parkin gene (MLOD = 5.07; LOD = 5.47) in families with at least 1 individual with PD onset at younger than 40 years, chromosomes 17q (MLOD = 2.28; LOD = 2.62), 8p (MLOD = 2.01; LOD = 2.22), and 5q (MLOD = 2.39; LOD = 1.50) overall and in families with late-onset PD, and chromosome 9q (MLOD = 1.52; LOD = 2.59) in families with both levodopa-responsive and levodopa-nonresponsive patients. CONCLUSIONS Our data suggest that the parkin gene is important in early-onset PD and that multiple genetic factors may be important in the development of idiopathic late-onset PD.
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MESH Headings
- Adult
- Age of Onset
- Aged
- Antiparkinson Agents/therapeutic use
- Chromosomes, Human, Pair 17
- Chromosomes, Human, Pair 3
- Chromosomes, Human, Pair 5
- Chromosomes, Human, Pair 6
- Chromosomes, Human, Pair 8
- Chromosomes, Human, Pair 9
- Drug Resistance
- Genetic Predisposition to Disease
- Genotype
- Humans
- Levodopa/therapeutic use
- Ligases/genetics
- Lod Score
- Microsatellite Repeats
- Middle Aged
- Parkinson Disease/drug therapy
- Parkinson Disease/epidemiology
- Parkinson Disease/genetics
- Risk Factors
- Ubiquitin-Protein Ligases
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Affiliation(s)
- W K Scott
- Center for Human Genetics, Box 3445, Duke University Medical Center, Durham, NC 27710, USA
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Martin ER, Scott WK, Nance MA, Watts RL, Hubble JP, Koller WC, Lyons K, Pahwa R, Stern MB, Colcher A, Hiner BC, Jankovic J, Ondo WG, Allen FH, Goetz CG, Small GW, Masterman D, Mastaglia F, Laing NG, Stajich JM, Ribble RC, Booze MW, Rogala A, Hauser MA, Zhang F, Gibson RA, Middleton LT, Roses AD, Haines JL, Scott BL, Pericak-Vance MA, Vance JM. Association of single-nucleotide polymorphisms of the tau gene with late-onset Parkinson disease. JAMA 2001; 286:2245-50. [PMID: 11710889 PMCID: PMC3973175 DOI: 10.1001/jama.286.18.2245] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
CONTEXT The human tau gene, which promotes assembly of neuronal microtubules, has been associated with several rare neurologic diseases that clinically include parkinsonian features. We recently observed linkage in idiopathic Parkinson disease (PD) to a region on chromosome 17q21 that contains the tau gene. These factors make tau a good candidate for investigation as a susceptibility gene for idiopathic PD, the most common form of the disease. OBJECTIVE To investigate whether the tau gene is involved in idiopathic PD. DESIGN, SETTING, AND PARTICIPANTS Among a sample of 1056 individuals from 235 families selected from 13 clinical centers in the United States and Australia and from a family ascertainment core center, we tested 5 single-nucleotide polymorphisms (SNPs) within the tau gene for association with PD, using family-based tests of association. Both affected (n = 426) and unaffected (n = 579) family members were included; 51 individuals had unclear PD status. Analyses were conducted to test individual SNPs and SNP haplotypes within the tau gene. MAIN OUTCOME MEASURE Family-based tests of association, calculated using asymptotic distributions. RESULTS Analysis of association between the SNPs and PD yielded significant evidence of association for 3 of the 5 SNPs tested: SNP 3, P =.03; SNP 9i, P =.04; and SNP 11, P =.04. The 2 other SNPs did not show evidence of significant association (SNP 9ii, P =.11, and SNP 9iii, P =.87). Strong evidence of association was found with haplotype analysis, with a positive association with one haplotype (P =.009) and a negative association with another haplotype (P =.007). Substantial linkage disequilibrium (P<.001) was detected between 4 of the 5 SNPs (SNPs 3, 9i, 9ii, and 11). CONCLUSIONS This integrated approach of genetic linkage and positional association analyses implicates tau as a susceptibility gene for idiopathic PD.
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Affiliation(s)
- E R Martin
- Center for Human Genetics, Box 2903, Duke University Medical Center, Durham, NC 27710, USA
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Kok CC, Boyt A, Gaudieri S, Martins R, Askanas V, Dalakas M, Kiers L, Mastaglia F, Garlepp M. Mitochondrial DNA variants in inclusion body myositis. Neuromuscul Disord 2000; 10:604-11. [PMID: 11053689 DOI: 10.1016/s0960-8966(00)00144-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Mitochondrial DNA variants have been shown to be associated with many diseases. Mutations at mitochondrial DNA nucleotide positions 3192, 3196, 3397 and 4336 have been described in association with late-onset Alzheimer's disease. The pathological similarities between inclusion body myositis and Alzheimer's disease prompted an analysis of the relationship between the reported mutations and sporadic inclusion body myositis. The 4336G variant was not significantly increased in patients with inclusion body myositis or Alzheimer's disease when compared to controls. None of the patients with inclusion body myositis carried mutations at nucleotide positions 3192, 3196 and 3397. A transition at nucleotide position 4580 was detected in some patients with inclusion body myositis and Alzheimer's disease but was not significantly higher in frequency when compared to controls. Phylogenetic analysis showed that the 4336G and 4580A variants clustered together in their respective group. A group of patients with inclusion body myositis also clustered together on a separate branch of the phylogenetic tree. Closer investigation of this group revealed a common polymorphism at nucleotide position 16311. The frequency of the 16311C variant was higher in inclusion body myositis than in Alzheimer's disease and controls, although when only caucasian patients were considered the increased frequency was not statistically significant. Further studies will be required to determine whether this variant plays a role in the pathogenesis of inclusion body myositis.
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Affiliation(s)
- C C Kok
- Australian Neuromuscular Research Institute, Queen Elizabeth II Medical Centre, Nedlands, Western Australia, Australia
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13
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Scott WK, Yamaoka LH, Stajich JM, Scott BL, Vance JM, Roses AD, Pericak-Vance MA, Watts RL, Nance M, Hubble J, Koller W, Stern MB, Colcher A, Allen FH, Hiner BC, Jankovic J, Ondo W, Laing NG, Mastaglia F, Goetz C, Pappert E, Small GW, Masterman D, Haines JL, Davies TL. The alpha-synuclein gene is not a major risk factor in familial Parkinson disease. Neurogenetics 1999; 2:191-2. [PMID: 10541595 DOI: 10.1007/s100480050083] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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House AK, Bell R, House J, Mastaglia F, Kumar A, D'Antuono M. Asymptomatic carotid artery stenosis associated with peripheral vascular disease: a prospective study. Cardiovasc Surg 1999; 7:44-9. [PMID: 10073759 DOI: 10.1016/s0967-2109(98)00076-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This study aimed to determine the prevalence of symptomless internal carotid artery stenosis in consecutive patients presenting with peripheral vascular disease. Duplex ultrasound screening of the carotid arteries was used to determine the degree of stenosis. Co-morbidities were recorded together with age, sex and tobacco use. Internal carotid artery stenosis of > 50% was found in 35% of patients. Among these there was > or = 70% stenosis in 18% of patients and of this group 5% had an occluded carotid vessel at first presentation. Males presented with peripheral vascular disease and associated carotid stenoses at a younger age than females. Male smokers had a higher prevalence of stenosis (P = 0.036) but all smokers had developed stenoses 3-5 years before non-smokers. Females with abdominal aortic aneurysms had a greater prevalence of carotid stenosis (P = 0.037), and male aneurysmal disease diminished stenosis prevalence (P = 0.023). Men with an elevated serum creatinine were more likely to have a stenosis (P = 0.019), but not women. The other co-morbidities were not specifically associated with carotid artery stenosis.
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Affiliation(s)
- A K House
- University of Western Australia, QEII Medical Centre, Nedlands, Australia
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Sudoyo H, Marzuki S, Byrne E, Mastaglia F. Phenotypic expression of mtDNA heteroplasmy in the skeletal muscle of patients with oculomyopathy: defect in mitochondrial protein synthesis. J Neurol Sci 1993; 117:83-91. [PMID: 8410073 DOI: 10.1016/0022-510x(93)90159-v] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The biochemical consequences of mtDNA heteroplasmy, observed in patients with a range of diseases associated with the mitochondrial respiratory enzymes deficiency is of particular interest, as they might provide information with regard to the regulatory interactions which govern the expression of the human mitochondrial genome. Three patients with chronic progressive external ophthalmoplegia (CPEO) were investigated to study the consequences of mtDNA heteroplasmy on mitochondrial protein synthesis. All 3 patients exhibited partially deleted mtDNA species (varying in size from 10.5 to 14 kb) in their skeletal muscle, which co-existed with the normal 16.5 kb mtDNA. The examination of mitochondrial translation products following the incorporation of [35S]methionine by isolated mitochondria, showed grossly abnormal patterns of mitochondrial translation products, suggesting a major disturbance in the regulation of mitochondrial protein synthesis.
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Affiliation(s)
- H Sudoyo
- Department of Biochemistry, Monash University, Clayton, Vic., Australia
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Sudoyo H, Marzuki S, Mastaglia F, Carroll W. Molecular genetics of Leber's hereditary optic neuropathy: study of a six-generation family from Western Australia. J Neurol Sci 1992; 108:7-17. [PMID: 1352537 DOI: 10.1016/0022-510x(92)90181-j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Molecular genetic studies were carried out on a 6-generation family from Western Australia with Leber's hereditary optic neuropathy. Pedigree analysis confirms the maternal inheritance of the genetic lesion underlying the disorder in this family. The presence of a recently reported disease-associated mutation at nucleotide 11778 of the mtDNA was established in one clinically affected family member by the sequencing of an appropriate 1.6 kb PCR-amplified fragment of the mtDNA; this mutation leads to an Arg340----His amino acid replacement in the ND4 subunit of respiratory complex I. The 11778 G to A base substitution is associated with the loss of an SfaNI restriction site. Examination of the representative members for this site revealed that while only mtDNA carrying this substitution could be detected in the leukocytes of 4 family members of the sixth generation, the mutated mtDNA was found to co-exist with the normal mtDNA population (heteroplasmy) in a clinically unaffected member from the fifth generation. This observation suggests that the nt 11778 mutation observed in this LHON family is relatively new; the observation of both heteroplasmy and apparent homoplasmy of the mtDNA in different family members might reflect the normal progression in the establishment of a mitochondrially inherited mutation.
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Affiliation(s)
- H Sudoyo
- Department of Biochemistry, Monash University, Clayton, Victoria, Australia
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Trounce I, Byrne E, Marzuki S, Dennett X, Sudoyo H, Mastaglia F, Berkovic SF. Functional respiratory chain studies in subjects with chronic progressive external ophthalmoplegia and large heteroplasmic mitochondrial DNA deletions. J Neurol Sci 1991; 102:92-9. [PMID: 1677417 DOI: 10.1016/0022-510x(91)90098-r] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The functional consequences of large heteroplasmic mtDNA deletions were investigated in a group of 6 patients with chronic progressive external ophthalmoplegia (CPEO) syndromes. State III respiration rates corrected for age were low with site I and II substrates in all cases and cytochrome oxidase activity was depressed. The severity of impairment varied and is consistent with inclusion of a variable percentage of non-functioning mitochondria (with deleted mtDNA) in the pellet. Western blot studies with a holocomplex antibody battery revealed no abnormalities in subunit content of complexes III and IV. A deficiency of several complex I subunits in 3 cases suggests that abnormal nuclear-mitochondrial regulation of complex I assembly may follow large mtDNA deletions.
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Affiliation(s)
- I Trounce
- Mitochondrial Diseases Investigational Unit, St. Vincent's Hospital, Fitzroy, Australia
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19
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Mastaglia F. Sphingolipidoses and Allied Disorders, Volume 1. Journal of Neurology, Neurosurgery & Psychiatry 1980. [DOI: 10.1136/jnnp.43.4.374-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Grainger K, Mastaglia F. Smoking, transient ischaemic attacks and stroke: A temporal association. Med J Aust 1976; 2:302-3. [PMID: 995004 DOI: 10.5694/j.1326-5377.1976.tb130188.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Two patients are described, both of whom demonstrate a temporal association between the clinical manifestations of cerebral ischaemia and smoking. A number of mechanisms through which smoking may influence cerebral blood flow and platelet function are discussed, and their relevance to the present cases is considered.
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