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Sökning: WFRF:(Oudit G. Y.)

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1.
  • Sungnak, W., et al. (författare)
  • SARS-CoV-2 entry factors are highly expressed in nasal epithelial cells together with innate immune genes
  • 2020
  • Ingår i: Nature Medicine. - : Nature Research. - 1078-8956 .- 1546-170X. ; 26:5, s. 681-687
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigated SARS-CoV-2 potential tropism by surveying expression of viral entry-associated genes in single-cell RNA-sequencing data from multiple tissues from healthy human donors. We co-detected these transcripts in specific respiratory, corneal and intestinal epithelial cells, potentially explaining the high efficiency of SARS-CoV-2 transmission. These genes are co-expressed in nasal epithelial cells with genes involved in innate immunity, highlighting the cells’ potential role in initial viral infection, spread and clearance. The study offers a useful resource for further lines of inquiry with valuable clinical samples from COVID-19 patients and we provide our data in a comprehensive, open and user-friendly fashion at www.covid19cellatlas.org. 
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2.
  • MacDonald, Patrick, et al. (författare)
  • Impaired glucose-stimulated insulin secretion, enhanced IP insulin tolerance and increased {beta}-cell mass in mice lacking the p110{gamma} isoform of PI3-kinase.
  • 2004
  • Ingår i: Endocrinology. - : The Endocrine Society. - 0013-7227 .- 1945-7170. ; 145:9, s. 4078-4083
  • Tidskriftsartikel (refereegranskat)abstract
    • Phosphoinositide 3-kinase (PI3 kinase) has been implicated in G protein-coupled receptor regulation of pancreatic ß-cell growth and glucose-stimulated insulin secretion. The G protein-activated p110{gamma} isoform of PI3 kinase was detected in insulinoma cells, mouse islets, and human islets. In 7- to 10-wk-old mice, knockout of p110{gamma} reduced the plasma insulin response to ip glucose injection and impaired first and second phase glucose-stimulated insulin secretion from pancreata perfused ex vivo. The p110{gamma} –/– mice responded to preinjection with the glucagon-like peptide-1 receptor agonist exendin 4, such that plasma glucose and insulin responses to ip glucose injection were not different from wild types. Mice lacking p110{gamma} were not diabetic and were only slightly glucose intolerant (ip glucose injection) compared with wild types, in part due to enhanced responsiveness to insulin as determined by an ip insulin tolerance test. Despite severely reduced insulin secretion in these animals, the p110{gamma} –/– mice had greater pancreatic insulin content, and an increased ß-cell mass due to ß-cell hypertrophy. These surprising results suggest that the G protein-coupled p110{gamma} isoform of PI3 kinase is not central to the development or maintenance of sufficient ß-cell mass but positively regulates glucose-stimulated insulin secretion.
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