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Träfflista för sökning "WFRF:(Brodin P) "

Sökning: WFRF:(Brodin P)

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  • Bereczki, E., et al. (författare)
  • Synaptic proteins in CSF relate to Parkinson's disease stage markers
  • 2017
  • Ingår i: Npj Parkinsons Disease. - : Springer Science and Business Media LLC. - 2373-8057. ; 3
  • Tidskriftsartikel (refereegranskat)abstract
    • Recent findings of morphological and functional changes in Parkinson's disease brains have shown altered synapse formation, but their role in cognitive decline is still an area under exploration. Here we measured the concentration of three key synaptic proteins, Rab3A, SNAP25 and neurogranin by enzyme-linked immunosorbent assay, in cerebrospinal fluid from a total of 139 participants (87 controls and 52 Parkinson's disease patients out of which 30 were drug-naive) and explored their associations with motor and cognitive symptoms. Associations with motor disease stage (assessed by Hoehn and Yahr scale) and cognitive performance (assessed by the Montreal Cognitive Assessment scores) were explored. An overall increase in the concentration of SNAP25 was found in Parkinson's disease patients (p = 0.032). Increased neurogranin levels were found in the drug naive patients subgroup (p = 0.023). Significant associations were observed between increased concentration of neurogranin and cognitive impairment in total Parkinson's disease group (p = 0.017), as well as in the drug naive (p = 0.021) and with motor disease stage (p = 0.041). There were no significant disease-driven changes observed in the concentration of Rab3a. Concentrations SNAP25 and neurogranin were increased in cerebrospinal fluid of Parkinson's disease patients in a disease specific manner and related to cognitive and motor symptom severity. Future longitudinal studies should explore whether cerebrospinal fluid synaptic proteins can predict cognitive decline in Parkinson's disease.
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  • Bloom, O, et al. (författare)
  • Colocalization of synapsin and actin during synaptic vesicle recycling
  • 2003
  • Ingår i: The Journal of cell biology. - : Rockefeller University Press. - 0021-9525 .- 1540-8140. ; 161:4, s. 737-747
  • Tidskriftsartikel (refereegranskat)abstract
    • It has been hypothesized that in the mature nerve terminal, interactions between synapsin and actin regulate the clustering of synaptic vesicles and the availability of vesicles for release during synaptic activity. Here, we have used immunogold electron microscopy to examine the subcellular localization of actin and synapsin in the giant synapse in lamprey at different states of synaptic activity. In agreement with earlier observations, in synapses at rest, synapsin immunoreactivity was preferentially localized to a portion of the vesicle cluster distal to the active zone. During synaptic activity, however, synapsin was detected in the pool of vesicles proximal to the active zone. In addition, actin and synapsin were found colocalized in a dynamic filamentous cytomatrix at the sites of synaptic vesicle recycling, endocytic zones. Synapsin immunolabeling was not associated with clathrin-coated intermediates but was found on vesicles that appeared to be recycling back to the cluster. Disruption of synapsin function by microinjection of antisynapsin antibodies resulted in a prominent reduction of the cytomatrix at endocytic zones of active synapses. Our data suggest that in addition to its known function in clustering of vesicles in the reserve pool, synapsin migrates from the synaptic vesicle cluster and participates in the organization of the actin-rich cytomatrix in the endocytic zone during synaptic activity.
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  • Brodin, Elisabeth, et al. (författare)
  • The Swedish version of the Haemophilia Activity List.
  • 2011
  • Ingår i: Haemophilia : the official journal of the World Federation of Hemophilia. - : Wiley. - 1365-2516. ; 17:4, s. 662-8
  • Tidskriftsartikel (refereegranskat)abstract
    • There has been increasing interest in the patient's perspective on outcome of treatment. The Haemophilia Activity List (HAL) has been developed as a disease-specific questionnaire for haemophilia patients and is a validated self-report measure of function developed according to WHO's International Classification of Functioning, Disability and Health. To validate HAL in Sweden. The Dutch and English versions of HAL were translated into Swedish using 'the forward-backward translation' method and merged into a final Swedish version. Validation was performed against the Swedish version of the questionnaires Arthritis Impact Measurement 2 (AIMS 2) and Impact on Participation and Autonomy (IPA). Two hundred and twenty-five patients with severe and moderate forms of haemophilia A and B from three centres were invited to participate in the study. Spearman's rank correlation test was used for validation, and internal consistency of the HAL was calculated with Cronbach's alpha. Eighty-four patients (39%) (18-80 years old) filled out the questionnaires. The internal consistency of the Swedish version of HAL was high, with Cronbach's alpha being 0.98-0.71. Function of the legs had the highest consistency and transportation had the lowest. The correlation was excellent between the HAL sum score and AIMS 2 physical (r = 0.84, P< 0.01), IPA autonomy indoors (r = 0.83, P < 0.01) and autonomy outdoors (r = 0.89, P < 0.01). The Swedish version of HAL has both internal consistency and convergent validity and may complement other functional tests to gather information on the patient's self-perceived ability.
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  • Brodin, P, et al. (författare)
  • The strength of inhibitory input during education quantitatively tunes the functional responsiveness of individual natural killer cells
  • 2009
  • Ingår i: Blood. - : American Society of Hematology. - 1528-0020 .- 0006-4971. ; 113:11, s. 2434-2441
  • Tidskriftsartikel (refereegranskat)abstract
    • Natural killer (NK) cells express inhibitory receptors for major histocompatibility complex (MHC) class I. If self-MHC is down-regulated or absent, lack of inhibition triggers “missing self” killing. NK cells developing in the absence of MHC class I are hypo-responsive, demonstrating that MHC class I molecules are required for NK-cell education. Here, we show that the number and the type of MHC class I alleles that are present during NK-cell education quantitatively determine the frequency of responding NK cells, the number of effector functions in individual NK cells, and the amount of interferon-γ production in NK cells of specific Ly49 subsets. A relationship between the extent of inhibitory signals during education and functional responsiveness was corroborated by an enhanced probability of NK cells expressing more than one inhibitory receptor for a single host self–MHC class I allele to degranulate after activation. Our data suggest that the capacity of an individual NK cell to respond to stimulation is quantitatively controlled by the extent of inhibitory signals that are received from MHC class I molecules during NK-cell education.
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