| 11. |
- Dillman, AA, et al.
(författare)
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Transcriptomic profiling of the human brain reveals that altered synaptic gene expression is associated with chronological aging
- 2017
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Ingår i: Scientific reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 7:1, s. 16890-
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Tidskriftsartikel (refereegranskat)abstract
- Aging is a biologically universal event, and yet the key events that drive aging are still poorly understood. One approach to generate new hypotheses about aging is to use unbiased methods to look at change across lifespan. Here, we have examined gene expression in the human dorsolateral frontal cortex using RNA- Seq to populate a whole gene co-expression network analysis. We show that modules of co-expressed genes enriched for those encoding synaptic proteins are liable to change with age. We extensively validate these age-dependent changes in gene expression across several datasets including the publically available GTEx resource which demonstrated that gene expression associations with aging vary between brain regions. We also estimated the extent to which changes in cellular composition account for age associations and find that there are independent signals for cellularity and aging. Overall, these results demonstrate that there are robust age-related alterations in gene expression in the human brain and that genes encoding for neuronal synaptic function may be particularly sensitive to the aging process.
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| 12. |
- Files, DC, et al.
(författare)
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I-SPY COVID adaptive platform trial for COVID-19 acute respiratory failure: rationale, design and operations
- 2022
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Ingår i: BMJ open. - : BMJ. - 2044-6055. ; 12:6, s. e060664-
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Tidskriftsartikel (refereegranskat)abstract
- The COVID-19 pandemic brought an urgent need to discover novel effective therapeutics for patients hospitalised with severe COVID-19. The Investigation of Serial studies to Predict Your Therapeutic Response with Imaging And moLecular Analysis (ISPY COVID-19 trial) was designed and implemented in early 2020 to evaluate investigational agents rapidly and simultaneously on a phase 2 adaptive platform. This manuscript outlines the design, rationale, implementation and challenges of the ISPY COVID-19 trial during the first phase of trial activity from April 2020 until December 2021.Methods and analysisThe ISPY COVID-19 Trial is a multicentre open-label phase 2 platform trial in the USA designed to evaluate therapeutics that may have a large effect on improving outcomes from severe COVID-19. The ISPY COVID-19 Trial network includes academic and community hospitals with significant geographical diversity across the country. Enrolled patients are randomised to receive one of up to four investigational agents or a control and are evaluated for a family of two primary outcomes—time to recovery and mortality. The statistical design uses a Bayesian model with ‘stopping’ and ‘graduation’ criteria designed to efficiently discard ineffective therapies and graduate promising agents for definitive efficacy trials. Each investigational agent arm enrols to a maximum of 125 patients per arm and is compared with concurrent controls. As of December 2021, 11 investigational agent arms had been activated, and 8 arms were complete. Enrolment and adaptation of the trial design are ongoing.Ethics and disseminationISPY COVID-19 operates under a central institutional review board via Wake Forest School of Medicine IRB00066805. Data generated from this trial will be reported in peer-reviewed medical journals.Trial registration numberNCT04488081.
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| 17. |
- Hibar, Derrek P., et al.
(författare)
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Novel genetic loci associated with hippocampal volume
- 2017
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Ingår i: Nature Communications. - : Springer Science and Business Media LLC. - 2041-1723. ; 8
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Tidskriftsartikel (refereegranskat)abstract
- The hippocampal formation is a brain structure integrally involved in episodic memory, spatial navigation, cognition and stress responsiveness. Structural abnormalities in hippocampal volume and shape are found in several common neuropsychiatric disorders. To identify the genetic underpinnings of hippocampal structure here we perform a genome-wide association study (GWAS) of 33,536 individuals and discover six independent loci significantly associated with hippocampal volume, four of them novel. Of the novel loci, three lie within genes (ASTN2, DPP4 and MAST4) and one is found 200 kb upstream of SHH. A hippocampal subfield analysis shows that a locus within the MSRB3 gene shows evidence of a localized effect along the dentate gyrus, subiculum, CA1 and fissure. Further, we show that genetic variants associated with decreased hippocampal volume are also associated with increased risk for Alzheimer's disease (r(g) = -0.155). Our findings suggest novel biological pathways through which human genetic variation influences hippocampal volume and risk for neuropsychiatric illness.
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| 18. |
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| 19. |
- Johansson Falck, Marlene, et al.
(författare)
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Embodied motivations for metaphorical meanings
- 2012
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Ingår i: Cognitive Linguistics. - Berlin : Mouton de Gruyter. - 0936-5907 .- 1613-3641. ; 23:2, s. 251-272
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Tidskriftsartikel (refereegranskat)abstract
- This paper explores the relationship between people’s mental imagery for their experiences of paths and roads and the metaphorical use of path and road in discourse. We report the results of two studies, one a survey examining people’s mental imagery about their embodied experiences with paths and roads, with the second providing a corpus analysis of the ways path and road are metaphorically used in discourse. Our hypothesis is that both people’s mental imagery for path and road, and speakers’ use of these words in metaphorical contexts are strongly guided by their embodied understandings of real-world events related to travel on paths and roads. The results of these studies demonstrate how bodily experiences with artifacts partly constrains not only how specific conceptual metaphors emerge, but how different metaphorical understandings are applied in talk about abstract entities and events.
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| 20. |
- Johansson Falck, Marlene, et al.
(författare)
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Embodied motivations for metaphorical meanings
- 2013
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Ingår i: Cognitive linguistics. - Berlin : Mouton de Gruyter. - 9783110333886 - 9783110335255 ; , s. 81-102
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Bokkapitel (refereegranskat)abstract
- This paper explores the relationship between people's mental imagery for their experiences of paths and roads and the metaphorical use of path and road in discourse. We report the results of two studies, one a survey examining people's mental imagery about their embodied experiences with paths and roads, with the second providing a corpus analysis of the ways path and road are metaphorically used in discourse. Our hypothesis is that both people's mental imagery for path and road, and speakers' use of these words in metaphorical contexts are strongly guided by their embodied understandings of real-world events related to travel on paths and roads. The results of these studies demonstrate how bodily experiences with artifacts partly constrains not only how specific conceptual metaphors emerge, but how different metaphorical understandings are applied in talk about abstract entities and events.
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