Flowchart: Preparation: Tau

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Text Box: TSH 

 

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Text Box: Tau

                                                                

Afrontotemporal dementia

Haplotype(H1)

Text Box: Apoe
 


               

 

Arch Neurol. 2002 Jun;59(6):935-9.Click here to read Links

Association between the extended tau haplotype and frontotemporal dementia.

Verpillat P, Camuzat A, Hannequin D, Thomas-Anterion C, Puel M, Belliard S, Dubois B, Didic M, Michel BF, Lacomblez L, Moreaud O, Sellal F, Golfier V, Campion D, Clerget-Darpoux F, Brice A.

Département d'Epidémiologie, de Biostatistique, et de Recherche Clinique, Hôpital Bichat-Claude Bernard, 46 rue Henri Huchard, 75877 Paris CEDEX 18, France. patrice.verpillat@bch.ap-hop-paris.fr

BACKGROUND: Recent studies have shown an association between an extended tau haplotype (H1) that covers the entire human tau gene and progressive supranuclear palsy or, more inconsistently, other neurodegenerative disorders, such as corticobasal degeneration, Parkinson disease, Alzheimer disease, and frontotemporal dementia (FTD). In addition, disease-causing mutations in the tau gene on chromosome 17 have been detected in some families with autosomal dominant FTD and parkinsonism. In FTD, the pathological accumulation of the microtubule-associated protein tau suggests that the tau gene may be a genetic risk factor for this disorder. OBJECTIVE: To confirm or refute the association between the H1 haplotype or the H1H1 genotype of the tau gene and FTD. DESIGN: Case-control study. SETTING: Neurology departments of 12 French university hospitals. PARTICIPANTS: One hundred unrelated patients with FTD and 79 controls. METHODS: Tau genotype (contiguous polymorphisms in exons 1, 7, and 13 and in intron 9 used to reconstruct the extended haplotypes H1 and H2). Clinical examination, psychometric testing, laboratory tests, computed tomography and magnetic resonance imaging, single-photon emission computed tomography, and electroencephalography for patients with FTD. RESULTS: The H1H1 genotype was significantly overrepresented in patients with FTD compared with controls (62% vs 46%; P=.01, 1-sided; odds ratio adjusted for age and sex, 1.95). After stratification according to apolipoprotein E (APOE) genotype, we found a significant interaction between APOE and tau genotypes (P=.03). CONCLUSIONS: This study of the largest series of patients with FTD confirms the primary role of tau in FTD and establishes that the H1 haplotype of the tau gene and the E2 allele of APOE interact by an unknown mechanism that increases the risk of FTD

Neuroreport. 2001 Apr 17;12(5):905-9.Click here to read Links

Increased risk for frontotemporal dementia through interaction between tau polymorphisms and apolipoprotein E epsilon4.

Ingelson M, Fabre SF, Lilius L, Andersen C, Viitanen M, Almkvist O, Wahlund LO, Lannfelt L.

Karolinska Institutet, NEUROTEC, Novum, KFC, Huddinge, Sweden.

The tau gene has an important role in frontotemporal dementia (FTD) as pathogenic mutations have been found in hereditary forms of the disease. Furthermore, a certain extended tau haplotype has been shown to increase the risk for progressive supranuclear palsy, corticobasal degeneration, Parkinson's disease and, in interaction with the apolipoprotein E (apoE) epsilon4 allele, Alzheimer's disease. By microsatellite analysis we investigated an intronic tau polymorphism, in linkage disequilibrium with the extended tau haplotype, in FTD patients (n = 36) and healthy controls (n = 39). No association between any of the tau alleles/genotypes and FTD was seen, but certain tau alleles and apoE epsilon4 interactively increased the risk of FTD (p = 0.006). We thus propose that this extended tau haplotype in combination with apoE epsilon4 is a genetic risk factor for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 2004;13(4):119-29.Click here to read Links