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Träfflista för sökning "WFRF:(Williams Bryan) srt2:(2005-2009)"

Sökning: WFRF:(Williams Bryan) > (2005-2009)

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1.
  • Hultcrantz, Monica, et al. (författare)
  • Interferons induce an antiviral state in human pancreatic islet cells
  • 2007
  • Ingår i: Virology. - : Elsevier BV. - 0042-6822 .- 1096-0341. ; 367:1, s. 92-101
  • Tidskriftsartikel (refereegranskat)abstract
    • Enterovirus infections, in particular those with Coxsackieviruses, have been linked to the development of type 1 diabetes (T1D). Although animal models have demonstrated that interferons (IFNs) regulate virus-induced T1D by acting directly on the beta cell, little is known on the human pancreatic islet response to IFNs. Here we show that human islet cells respond to IFNs by expressing signature genes of antiviral defense. We also demonstrate that they express three intracellular sensors for viral RNA, the toll like receptor 3 (TLR3) gene, the retinoic acid-inducible gene I (RIG-I) and the melanoma differentiation-associated gene-5 (MDA-5), which induce type I IFN production in infected cells. Finally, we show for the first time that the IFN-induced antiviral state provides human islets with a powerful protection from the replication of Coxsackievirus. This may be critical for beta cell survival and protection from virus-induced T1D in humans.
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2.
  • Jallow, Muminatou, et al. (författare)
  • Genome-wide and fine-resolution association analysis of malaria in West Africa.
  • 2009
  • Ingår i: Nature Genetics. - : Springer Science and Business Media LLC. - 1061-4036 .- 1546-1718. ; , s. 657-665
  • Tidskriftsartikel (refereegranskat)abstract
    • We report a genome-wide association (GWA) study of severe malaria in The Gambia. The initial GWA scan included 2,500 children genotyped on the Affymetrix 500K GeneChip, and a replication study included 3,400 children. We used this to examine the performance of GWA methods in Africa. We found considerable population stratification, and also that signals of association at known malaria resistance loci were greatly attenuated owing to weak linkage disequilibrium (LD). To investigate possible solutions to the problem of low LD, we focused on the HbS locus, sequencing this region of the genome in 62 Gambian individuals and then using these data to conduct multipoint imputation in the GWA samples. This increased the signal of association, from P = 4 x 10(-7) to P = 4 x 10(-14), with the peak of the signal located precisely at the HbS causal variant. Our findings provide proof of principle that fine-resolution multipoint imputation, based on population-specific sequencing data, can substantially boost authentic GWA signals and enable fine mapping of causal variants in African populations.
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6.
  • Saramat, Ali, 1977, et al. (författare)
  • Large thermoelectric figure of merit at high temperature in Czochralski-grown clathrate Ba8Ga16Ge30
  • 2006
  • Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 99:2, s. 023708 -
  • Tidskriftsartikel (refereegranskat)abstract
    • The Czochralski method was used to grow a 46-mm -long crystal of the Ba8 Ga16 Ge30 clathrate, which was cut into disks that were evaluated for thermoelectric performance. The Seebeck coefficient and electrical and thermal conductivities all showed evidence of a transition from extrinsic to intrinsic behavior in the range of 600-900 K. The corresponding figure of merit (ZT) was found to be a record high of 1.35 at 900 K and with an extrapolated maximum of 1.63 at 1100 K. This makes the Ba8 Ga16 Ge30 clathrate an exceptionally strong candidate for medium and high-temperature thermoelectric applications.
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