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Sökning: WFRF:(Dawson )

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  • 2021
  • swepub:Mat__t
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  • Niemi, MEK, et al. (författare)
  • 2021
  • swepub:Mat__t
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  • Cabaleiro-Lago, Celia, et al. (författare)
  • Inhibition of IAPP and IAPP(20-29) fibrillation by polymeric nanoparticles
  • 2010
  • Ingår i: Langmuir. - : The American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 26:5, s. 3453-3461
  • Tidskriftsartikel (refereegranskat)abstract
    • The fibrillation process of the islet amyloid polypeptide (IAPP) and its fragment (IAPP(20-29)) was studied by means of Thioflavin T (ThT) fluorescence and transmission electron microscopy in the absence and presence of N-isopropylacrylamide:N-tert-butylacrylamide (NiPAM:BAM) copolymeric nanoparticles. The process was found to be strongly affected by the presence of the nanoparticles, which retard protein fibrillation as a function of the chemical surface properties of the nanoparticles. The NiPAM:BAM ratio was varied from 50:50 to 100:0. The nanoparticles with higher fraction of NiPAM imposed the strongest retardation of IAPP and IAPP(20-29) fibrillation. These particles have the strongest hydrogen bonding capacity due to the less bulky N-isopropyl group and thus less steric hindrance of the hydrogen-bonding groups of the nanoparticle polymer backbone. Kinetic fibrillation data, as monitored by ThT fluorescence and supported by surface plasmon resonance experiments, suggest that the peptide is strongly absorbed onto the surface of the nanoparticles. This interaction reduces the concentration of peptide free in solution available to proceed to fibrillation which results in an increased lag time of fibrillation, observed as a delayed onset of ThT fluorescence increase, plus a reduction of the amount of fibrils formed as indicated by the equilibrium values at the end of the fibrillation reaction. For the fragment (IAPP(20-29)), the presence of nanoparticles changes the mechanism of association from monomers to fibrils, by interfering with early oligomeric species along the fibrillation pathway.
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  • Dawson, Andreas, et al. (författare)
  • The effect of botulinum toxin A on patients with persistent idiopathic dentoalveolar pain : A systematic review
  • 2020
  • Ingår i: Journal of Oral Rehabilitation. - : John Wiley & Sons. - 1365-2842 .- 0305-182X. ; 47:9, s. 1184-1191
  • Tidskriftsartikel (refereegranskat)abstract
    • BACKGROUND: It has been suggested that botulinum toxin A (BONT-A) is a safe and effective treatment in relieving pain in patients with persistent idiopathic dentoalveolar pain (PIDP).OBJECTIVES: This study aimed to systematically evaluate all the available studies investigating the pain-relieving effects of BONT-A in patients with PIDP.METHODS: A systematic search with specific search terms was made in PubMed, Web of Science and Scopus. Two authors screened titles and abstracts and selected eligible studies for inclusion in the systematic review. The quality of the studies was evaluated by the 12 items Quality Assessment Tool for Observational studies (Pre-Post) Studies with No Control Group, and the level of evidence was assessed according to GRADE.RESULTS: Three observational studies of 3695 identified were included (445 overlapping studies; 3247 excluded studies). All studies were uncontrolled observational studies investigating the pain-relieving effect of BONT-A in patients with PIDP. The included studies had a fair quality (moderate risk of bias) and insufficient level of evidence. The pain reducing effect by BONT-A injections was in average 50% or more in two studies, in one study 3 out of 4 patients became almost pain free.CONCLUSIONS: This systematic review shows that presently the level of scientific evidence is insufficient to evaluate the pain-relieving effect of BONT-A injections in patients with PIDP. There are indications that BONT-A injections could be a possible management option for patients with PIDP that seems to be safe and with few adverse events. There is a need for well-designed placebo-controlled, double-blind RCTs.
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