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Sökning: WFRF:(LeBlanc Katarina)

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  • Ajalloueian, Fatemeh, et al. (författare)
  • Investigation of Human Mesenchymal Stromal Cells Cultured on PLGA orPLGA/Chitosan Electrospun Nanofibers
  • 2015
  • Ingår i: Journal of Bioprocessing & Biotechniques. - : OMICS Publishing Group. - 2155-9821. ; 5:6
  • Tidskriftsartikel (refereegranskat)abstract
    • We compared the viability, proliferation, and differentiation of human Mesenchymal Stromal Cells (MSC)after culture on poly(lactic-co-glycolic acid) (PLGA) and PLGA/chitosan (PLGA/CH) hybrid scaffolds. We appliedconventional and emulsion electrospinning techniques, respectively, for the fabrication of the PLGA and PLGA/CH scaffolds. Electrospinning under optimum conditions resulted in an average fiber diameter of 166 ± 33 nmfor the PLGA/CH and 680 ± 175 nm for the PLGA scaffold. The difference between the tensile strength of thePLGA and PLGA/CH nanofibers was not significant, but PLGA/CH showed a significantly lower tensile modulusand elongation at break. However, it should be noted that the extensibility of the PLGA/CH was higher than thatof the nanofibrous scaffolds of pure chitosan. As expected, a higher degree of hydrophilicity was seen with PLGA/CH, as compared to PLGA alone. The biocompatibility of the PLGA and PLGA/CH scaffolds was compared usingMTS assay as well as analysis by scanning electron microscopy and confocal microscopy. The results showed thatboth scaffold types supported the viability and proliferation of human MSC, with significantly higher rates on PLGA/CH nanofibers. Nonetheless, an analysis of gene expression of MSC grown on either PLGA or PLGA/CH showed asimilar differentiation pattern towards bone, nerve and adipose tissues.
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  • Fransson, Moa, et al. (författare)
  • Intranasal Delivery of CNS-Retargeted Human Mesenchymal Stromal Cells Prolongs Treatment Efficacy of Experimental Autoimmune Encephalomyelitis
  • 2014
  • Ingår i: Immunology. - : Wiley. - 0019-2805 .- 1365-2567. ; 142:3, s. 431-441
  • Tidskriftsartikel (refereegranskat)abstract
    • Treatment with mesenchymal stromal cells (MSC) is currently of interest for a number of diseases including multiple sclerosis (MS). MSCs is well known to target inflamed tissues however, in a therapeutic scenery, systemic administration will lead to few cells reaching the brain. We hypothesized that MSCs may target the brain upon intranasal (i.n) administration and persist in CNS tissue if expressing a CNS-targeting receptor. To demonstrate proof of concept, MSCs were genetically engineered to express a myelin oligodendrocyte glycoprotein (MOG)-specific receptor. Engineered MSCs retained their immunosuppressive capacity, infiltrated into the brain upon i.n. cell administration, and were able to significantly reduce disease symptoms of experimental autoimmune encephalomyelitis (EAE). The mice treated with CNS-targeting MSCs were resistant to further EAE induction whereas non-targeted MSC did not give such persistent effects. Histological analysis revealed increased brain restoration in engineered MSC-treated mice. In conclusion, MSCs can be genetically engineered to target the brain and prolong therapeutic efficacy in an EAE model.
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