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Sökning: WFRF:(Rising A)

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  • Lin, CH, et al. (författare)
  • In Vitro Study of Human Immune Responses to Hyaluronic Acid Hydrogels, Recombinant Spidroins and Human Neural Progenitor Cells of Relevance to Spinal Cord Injury Repair
  • 2021
  • Ingår i: Cells. - : MDPI AG. - 2073-4409. ; 10:7
  • Tidskriftsartikel (refereegranskat)abstract
    • Scaffolds of recombinant spider silk protein (spidroin) and hyaluronic acid (HA) hydrogel hold promise in combination with cell therapy for spinal cord injury. However, little is known concerning the human immune response to these biomaterials and grafted human neural stem/progenitor cells (hNPCs). Here, we analyzed short- and long-term in vitro activation of immune cells in human peripheral blood mononuclear cells (hPBMCs) cultured with/without recombinant spidroins, HA hydrogels, and/or allogeneic hNPCs to assess potential host–donor interactions. Viability, proliferation and phenotype of hPBMCs were analyzed using NucleoCounter and flow cytometry. hPBMC viability was confirmed after exposure to the different biomaterials. Short-term (15 h) co-cultures of hPBMCs with spidroins, but not with HA hydrogel, resulted in a significant increase in the proportion of activated CD69+ CD4+ T cells, CD8+ T cells, B cells and NK cells, which likely was caused by residual endotoxins from the Escherichia coli expression system. The observed spidroin-induced hPBMC activation was not altered by hNPCs. It is resource-effective to evaluate human compatibility of novel biomaterials early in development of the production process to, when necessary, make alterations to minimize rejection risk. Here, we present a method to evaluate biomaterials and hPBMC compatibility in conjunction with allogeneic human cells.
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  • Rising, A., et al. (författare)
  • Major ampullate spidroins from Euprosthenops australis : multiplicity at protein, mRNA and gene levels
  • 2007
  • Ingår i: Insect molecular biology (Print). - : Wiley. - 0962-1075 .- 1365-2583. ; 16:5, s. 551-561
  • Tidskriftsartikel (refereegranskat)abstract
    • Spider dragline silk possesses extraordinary mechanical properties. It consists of large fibrous proteins called spidroins that display modular structures. It is known to consist of two proteins: the major ampullate spidroin (MaSp) 1 and MaSp2. This study analyses MaSp sequences from the nursery-web spider Euprosthenops australis. We have identified a previously uncharacterized MaSp2 sequence and a new MaSp-like spidroin, which display distinct homogenous submotifs within their respective Gly-rich repeats. Furthermore, a group of MaSp1 cDNA clones show unexpected heterogeneity. Genomic PCR identified several MaSp1 gene variants within individual spiders, which suggests the presence of a gene cluster in E. australis. Finally, the evolution of spidroin genes is discussed in relation to phylogenetic analysis of nonrepetitive C-terminal domains from diverse species.
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  • Resultat 21-30 av 34

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