["I can live with it, if it doesn't get worse"-Caregivers of people with dementia in Austria talk about their needs and experiences]. / "Wenn es nicht schlimmer wird, kann ich damit leben" Bedürfnisse und Erfahrungen pflegender Angehöriger von Menschen mit Demenz in Österreich.

BACKGROUND: Family members undertake a large proportion of the care of people living with dementia. The purpose of this study was to explore the needs and caring experiences of family caregivers of people with dementia in Austria, who were organized in a self-help group. METHODS: Using an explorative, qualitative research design, data were collected through 1 focus group and 3 in-depth interviews with a total of 10 family caregivers of people with dementia from a self-help group. An inductive qualitative analysis was applied and resulted in four themes: frightening images of dementia in society, continuity and conflicts in the relationship to the person with dementia, caring for one's own health and lack of support and community. RESULTS: Continuity in the relationship to and joint activities with the person with dementia were positively described but simultaneously the frequently occurring conflicts were described as burdensome. Also described were bureaucratic, structural and financial hurdles for the utilization of support services. The existing support systems offered were mostly judged to be inadequate, inaccessible or unaffordable. The participating caregivers described the communication of the diagnosis of dementia in the environment as a prerequisite for support in the community. DISCUSSION: Destigmatization and the further development of dementia-specific support offers and self-help groups for caring relatives and people living with dementia could represent further steps forward. Communicating the dementia diagnosis in the social environment and community seems to be an important but difficult step for caregivers organized in a self-help group.

Elo1p-dependent carboxy-terminal elongation of C14:1Delta(9) to C16:1Delta(11) fatty acids in Saccharomyces cerevisiae.

Saccharomyces cerevisiae medium-chain acyl elongase (ELO1) mutants have previously been isolated in screens for fatty acid synthetase (FAS) mutants that fail to grow on myristic acid (C14:0)-supplemented media. Here we report that wild-type cells cultivated in myristoleic acid (C14:1Delta(9))-supplemented media synthesized a novel unsaturated fatty acid that was identified as C16:1Delta(11) fatty acid by gas chromatography-mass spectroscopy. Synthesis of C16:1Delta(11) was dependent on a functional ELO1 gene, indicating that Elo1p catalyzes carboxy-terminal elongation of unsaturated fatty acids (alpha-elongation). In wild-type cells, the C16:1Delta(11) elongation product accounted for approximately 12% of the total fatty acids. This increased to 18% in cells that lacked a functional acyl chain desaturase (ole1Delta mutants) and hence were fully dependent on uptake and elongation of C14:1. The observation that ole1Delta mutant cells grew almost like wild type on medium supplemented with C14:1 indicated that uptake and elongation of unsaturated fatty acids were efficient. Interestingly, wild-type cells supplemented with either C14:1 or C16:1 fatty acids displayed dramatic alterations in their phospholipid composition, suggesting that the availability of acyl chains is a dominant determinant of the phospholipid class composition of cellular membranes. In particular, the relative content of the two major phospholipid classes, phosphatidylethanolamine and phosphatidylcholine, was strongly dependent on the chain length of the supplemented fatty acid. Moreover, analysis of the acyl chain composition of individual phospholipid classes in cells supplemented with C14:1 revealed that the relative degree of acyl chain saturation characteristic for each phospholipid class appeared to be conserved, despite the gross alteration in the cellular acyl chain pool. Comparison of the distribution of fatty acids that were taken up and elongated (C16:1Delta(11)) to those that were endogenously synthesized by fatty acid synthetase and then desaturated by Ole1p (C16:1Delta(9)) in individual phospholipid classes finally suggested the presence of two different pools of diacylglycerol species. These results will be discussed in terms of biosynthesis of different phospholipid classes via either the de novo or the Kennedy pathway.

A novel cold-sensitive allele of the rate-limiting enzyme of fatty acid synthesis, acetyl coenzyme A carboxylase, affects the morphology of the yeast vacuole through acylation of Vac8p.

The yeast vacuole functions both as a degradative organelle and as a storage depot for small molecules and ions. Vacuoles are dynamic reticular structures that appear to alternately fuse and fragment as a function of growth stage and environment. Vac8p, an armadillo repeat-containing protein, has previously been shown to function both in vacuolar inheritance and in protein targeting from the cytoplasm to the vacuole. Both myristoylation and palmitoylation of Vac8p are required for its efficient localization to the vacuolar membrane (Y.-X. Wang, N. L. Catlett, and L. S. Weisman, J. Cell Biol. 140:1063-1074, 1998). We report that mutants with conditional defects in the rate-limiting enzyme of fatty acid synthesis, acetyl coenzyme A carboxylase (ACC1), display unusually multilobed vacuoles, similar to those observed in vac8 mutant cells. This vacuolar phenotype of acc1 mutant cells was shown biochemically to be accompanied by a reduced acylation of Vac8p which was alleviated by fatty acid supplementation. Consistent with the proposed defect of acc1 mutant cells in acylation of Vac8p, vacuolar membrane localization of Vac8p was impaired upon shifting acc1 mutant cells to nonpermissive condition. The function of Vac8p in protein targeting, on the other hand, was not affected under these conditions. These observations link fatty acid synthesis and availability to direct morphological alterations of an organellar membrane.