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- Rosa, Isabel M. D., et al.
(författare)
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Multiscale scenarios for nature futures
- 2017
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Ingår i: Nature Ecology & Evolution. - : Springer Science and Business Media LLC. - 2397-334X. ; 1:10, s. 1416-1419
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Targets for human development are increasingly connected with targets for nature, however, existing scenarios do not explicitly address this relationship. Here, we outline a strategy to generate scenarios centred on our relationship with nature to inform decision-making at multiple scales.
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- Visser, Pieter Jelle, et al.
(författare)
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Cerebrospinal fluid total tau levels indicate aberrant neuronal plasticity in Alzheimer's disease.
- 2020
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Ingår i: medRxiv : the preprint server for health sciences. - : Cold Spring Harbor Laboratory.
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Alzheimer's disease (AD) is characterised by abnormal amyloid beta and tau processing. Previous studies reported that cerebrospinal fluid (CSF) total tau (t-tau) levels vary between patients. Here we show that CSF t-tau variability is associated with distinct impairments in neuronal plasticity mediated by gene repression factors SUZ12 and REST. AD individuals with abnormal t-tau levels have increased CSF concentrations of plasticity proteins regulated by SUZ12 and REST. AD individuals with normal t-tau, on the contrary, have decreased concentrations of these plasticity proteins and increased concentrations in proteins associated with blood-brain and blood CSF-barrier dysfunction. Genomic analyses suggested that t-tau levels in part depend on genes involved in gene expression. The distinct plasticity abnormalities in AD as signaled by t-tau urge the need for personalised treatment.
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- Popp, Magnus, 1965-
(författare)
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Disentangling the Reticulate History of Polyploids in Silene (Caryophyllaceae)
- 2004
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- DNA sequences from the rps16 intron and the psbE-petL spacer from the chloroplast genome, the ribosomal nuclear ITS region, and introns from the low copy nuclear genes RPA2, RPB2, RPD2a and RPD2b, are in different combinations used to infer phylogenetic relationships in Sileneae (Caryophyllaceae). Used in concert, the biparentally inherited nuclear regions are useful to distinguish between paralogy due to allopolyploidy and single gene duplications, respectively, because the latter are not expected to give rise to repeated phylogenetic patterns in potentially unlinked sequence regions. In addition, the sequences resolve previously poorly known relationships in the tribe Sileneae. Several independent losses and incomplete concerted evolution are inferred between the two RPD2 paralogues in a subgroup of Silene. An allopolyploid origin is suggested for the tetraploid S. aegaea, with the maternal ancestor from the diploid S. pentelica lineage, and the paternal contributor from the diploid S. sedoides lineage. Silene involucrata originated as an allotetraploid with the diploid lineage of Arctic S. uralensis as cytoplasmic donor and the diploid Siberian/Northeast Asian S. ajanensis lineage as pollen donor. A subsequent allopolyploidization with the S. ajanensis lineage as pollen donor and the tetraploid S. involucrata lineage as cytoplasmic donor resulted in the hexaploid lineage of S. sorensenis sensu lato. A monophyletic origin of the North American polyploids is rejected. One lineage consists of tetraploid S. menziesii and its diploid allies. A separate lineage leads to a clade consisting of both diploid and polyploid Arctic, European and Asian taxa in addition to the majority of the North American polyploids. The tetraploid S. californica and the hexaploid S. hookeri are derived from separate allopolyploidization events between these two lineages.
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