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Search: WFRF:(Backman Olof) > Social Sciences

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1.
  • Ferencz, Beata, et al. (author)
  • The influence of APOE and TOMM40 polymorphisms on hippocampal volume and episodic memory in old age
  • 2013
  • In: Frontiers in Human Neuroscience. - : Frontiers Media SA. - 1662-5161. ; 7
  • Journal article (peer-reviewed)abstract
    • Mitochondrial dysfunction is implicated in neurodegenerative disorders, such as Alzheimer's disease (AD). Translocase of outer mitochondrial membrane 40 (TOMM40) may be influential in this regard by influencing mitochondrial neurotoxicity. Little is known about the influence of the TOMM40 gene on hippocampal (HC) volume and episodic memory (EM), particularly in healthy older adults. Thus, we sought to discern the influence of TOMM40 single nucleotide polymorphisms (SNPs), which have previously been associated with medial temporal lobe integrity (rs11556505 and rs2075650), on HC volume and EM. The study sample consisted of individuals from the Swedish National Study on Aging and Care in Kungsholmen (SNAC-K) who were free of dementia and known neurological disorders, and 6087 years of age (n = 424). EM was measured by using a 16-item word list with a 2-min free recall period and delineation of the HC was performed manually. The influence of Apolipoprotein E (APOE) and TOMM40 was assessed by 2 x 2 ANOVAs and partial correlations. There was no effect of APOE and TOMM40 on EM performance and HC volume. However, partial correlations revealed that HC volume was positively associated with free recall performance (r = 0.21, p < 0.01, r(2) = 0.04). When further stratified for TOMM40, the observed association between HC volume and free recall in APOE epsilon 4 carriers was present in combination with TOMM40 rs11556505 any T (r = 0.28, p < 0.01, R-2 = 0.08) and rs2075650 any G (r = 0.28, p < 0.01, R-2 = 0.08) risk alleles. This pattern might reflect higher reliance on HC volume for adequate EM performance among APOE epsilon 4 carriers with additional TOMM40 risk alleles suggesting that the TOMM40 gene cannot merely be considered a marker of APOE genotype. Nevertheless, neither APOE nor TOMM40 influenced HC volume or EM in this population-based sample of cognitively intact individuals over the age of 60.
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2.
  • Mullier, G.A., et al. (author)
  • A search for an unexpected asymmetry in the production of e+μ− and e−μ+ pairs in proton–proton collisions recorded by the ATLAS detector at √s = 13 TeV
  • 2022
  • In: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 830
  • Journal article (peer-reviewed)abstract
    • This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e+μ− and e−μ+ pairs to constrain physics processes beyond the Standard Model. It uses 139fb−1 of proton–proton collision data recorded at √s=13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e+μ− to e−μ+, the search contains two broad signal regions which are used to provide model-independent constraints on the ratio of cross sections at the 2% level. The search also has two special selections targeting supersymmetric models and leptoquark signatures. Observations using one of these selections are able to exclude, at 95% confidence level, singly produced smuons with masses up to 640 GeV in a model in which the only other light sparticle is a neutralino when the R-parity-violating coupling λ231′ is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when geu1R=gμc1R=1, at 95% confidence level. The limit on the coupling reduces to geu1R=gμc1R=0.46 for a mass of 1420 GeV.
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peer-reviewed (2)
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Lund-Jensen, Bengt (1)
Ripellino, Giulia (1)
Strandberg, Jonas (1)
Zwalinski, L. (1)
Brenner, Richard (1)
Ekelöf, Tord (1)
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Jarlskog, G. (1)
Konya, B. (1)
Lytken, E. (1)
Mankinen, K.H. (1)
Mjörnmark, J.U. (1)
Mullier, G.A. (1)
Poettgen, R. (1)
Skorda, E. (1)
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