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Sökning: WFRF:(Sapp M) > (2020-2022)

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1.
  • Lau, Allison N., et al. (författare)
  • Dissecting cell-type-specific metabolism in pancreatic ductal adenocarcinoma
  • 2020
  • Ingår i: eLife. - 2050-084X. ; 9, s. 1-35
  • Tidskriftsartikel (refereegranskat)abstract
    • Tumors are composed of many different cell types including cancer cells, fibroblasts, and immune cells. Dissecting functional metabolic differences between cell types within a mixed population can be challenging due to the rapid turnover of metabolites relative to the time needed to isolate cells. To overcome this challenge, we traced isotope-labeled nutrients into macromolecules that turn over more slowly than metabolites. This approach was used to assess differences between cancer cell and fibroblast metabolism in murine pancreatic cancer organoid-fibroblast co-cultures and tumors. Pancreatic cancer cells exhibited increased pyruvate carboxylation relative to fibroblasts, and this flux depended on both pyruvate carboxylase and malic enzyme 1 activity. Consequently, expression of both enzymes in cancer cells was necessary for organoid and tumor growth, demonstrating that dissecting the metabolism of specific cell populations within heterogeneous systems can identify dependencies that may not be evident from studying isolated cells in culture or bulk tissue.
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3.
  • Kuzma-Kozakiewicz, Magdalena, et al. (författare)
  • Putative founder effect in the Polish, Iranian and United States populations for the L144SSOD1mutation associated with slowly uniform phenotype of amyotrophic lateral sclerosis
  • 2021
  • Ingår i: Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration. - : Taylor & Francis. - 2167-8421 .- 2167-9223. ; 22:1-2, s. 80-85
  • Tidskriftsartikel (refereegranskat)abstract
    • Mutations inSOD1cause approximately 12-25% of familial ALS and approximate to 2% of apparently sporadic ALS cases. Clinical phenotypes linked to SOD1 mutations are heterogeneous and intra-familial variability of the clinical phenotype is frequently observed. SOD1 L144S mutation, identified also in Brazil, Iran and United States, is the second most frequent mutation among ALS patients in Poland. So far, 10 FALS pedigrees with SOD1 L144S mutation have been reported worldwide. The aim of the study was to establish the origin of SOD1 L144S mutation in geographically distinct populations. The clinical presentation of the Polish patients was compared with those from the previously reported populations (26 ever-reported patients). Clinically, L144S mutation is associated with both sporadic and familial ALS of relatively slow uniform course, a prevalent onset in the lower limbs, either classic or PMA presentation and a long survival time. Like in the case of other previously described SOD1 mutations, there was an intra-familial heterogeneity and reduced penetrance for ALS was observed. We propose that the L144S SOD1 mutation in the three studied populations has a common founder most likely of Polish origin.
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