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Digitale Medien

Apolipoprotein E type 4 allele and Alzheimer's disease: Effect on age at onset and relative risk in different age groups (1996)

Kurz, Alexander ; Altland, Klaus ; Lautenschlager, Nicola ; [weitere]

Springer

Journal of neurology 243 (1996), S. 452-456

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ISSN: 1432-1459

Schlagwort(e): Alzheimer's disease ; Apolipoprotein E ; Age at onset ; Relative risk

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract The effect of the apolipoprotein E (apoE) genotype on the age at onset of Alzheimer's disease (AD) and the relative risk conferred by the apoE ε4 allele were studied in 91 patients and 69 healthy age-matched controls. According to the age of presentation, which varied from 44 to 95 years, subjects were divided into four groups. The inheritance of at least one ɛ4 allele was associated with a significant reduction of the age at onset by 7.7 years among patients who were 83 years or older when examined. A weaker inverse relationship between the ɛ4 allele and the age at onset was also observed among patients who were aged 44–63 years at presentation. The effect of the c4 allele was minimal or absent in the two intermediate age categories. The relative risk of AD conferred by the inheritance of at least one £4 allele showed no consistent age-related pattern. The overall risk expressed as an odds ratio was 5.0 (95% CI 2.4–10.5). With respect to the limitations of the study, we tentatively conclude (1) that the effect of the apoE ɛ4 allele on the age at onset is not restricted to AD patients of a particular age, in accordance with current hypotheses on the role of apoE gene products in the biology of AD; (2) that the relative risk of AD associated with the ɛ4 allele is not significantly modulated by age. Although the apoE ɛ4 allele is an important susceptibility factor for AD occurring in middle age as well as in later life, it is of limited value in routine clinical diagnosis and should not be used for predictive testing in asymptomatic individuals.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00900498

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Digitale Medien

η-Mo4O11 und Mg2Mo3O8: eine neue Synthese und Verfeinerung ihrer Kristallstrukturen (1995)

Knorr, Roland ; Müller, Ulrich

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 621 (1995), S. 541-545

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ISSN: 0044-2313

Schlagwort(e): Dimagnesium trimolybdate(IV) ; molybdenum oxide ; preparation ; crystal structures ; Chemistry ; Inorganic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Beschreibung / Inhaltsverzeichnis: η-Mo4O11 and Mg2Mo3O8: a New Way of Synthesis and Refinement of their Crystal StructuresMg2Mo3O8 was obtained by solid state reaction of MgI2 and MoO3 (1:1) at 200°C and subsequent crystallization at 800°C. Under the same conditions, ZnI2 and MoO3 only yielded rather impure Zn2Mo3O8; however, when ZnI2 or CdI2 and MoO3 were taken in a molar ratio of 1:2, well crystallized η-Mo4O11 was obtained. The known crystal structures of Mg2Mo3O8 and η-Mo4O11 were refined with new X-ray diffraction data (R = 0.030 and 0.059, respectively). The kind of twinning of monoclinic η-Mo4O11 is discussed.

Notizen: Durch Festkörperreaktion von MgI2 und MoO3 (1:1) bei 200°C und anschließender Kristallisation bei 800°C entsteht Mg2Mo3O8. Mit ZnI2 entsteht unter den gleichen Bedingungen nur stark verunreinigtes Zn2Mo3O8; beim Einsetzen von ZnI2 oder CdI2 und MoO3 im Molverhältnis von 1:2 wird dagegen gut kristallisiertes η-Mo4O11 erhalten. Die bekannten Kristallstrukturen von Mg3Mo8O8 und η-Mo4O11 wurden mit neuen Meßdaten verfeinert (R = 3,0 bzw. 5,9%). Die Art der Zwillingsbildung des monoklinen η-Mo4O11 wird diskutiert.

Zusätzliches Material: 2 Ill.