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  • 1.
    Horvath, Istvan
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Iashchishyn, Igor A.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of General Chemistry, Sumy State University, Ukraine.
    Forsgren, Lars
    Umeå University, Faculty of Medicine, Department of Pharmacology and Clinical Neuroscience, Clinical Neuroscience.
    Morozova-Roche, Ludmilla A.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Immunochemical Detection of alpha-Synuclein Autoantibodies in Parkinson's Disease: Correlation between Plasma and Cerebrospinal Fluid Levels2017In: ACS Chemical Neuroscience, ISSN 1948-7193, E-ISSN 1948-7193, Vol. 8, no 6, p. 1170-1176Article in journal (Refereed)
    Abstract [en]

    Autoantibodies to Parkinson's disease (PD) amyloidogenic protein, a-synuclein, were recognized as a prospective biomarker for early disease diagnostics, yet there is inconsistency in previous reports, potentially related to PD status. Therefore, plasma and cerebrospinal fluid (CSF) of the cross-sectional cohort of 60 individuals, including recently diagnosed PD patients with mild and moderate PD and age-matched controls, were examined by enzyme-linked immunosorbent assay (ELISA). Nonparametric statistics was used for data analysis. We found significantly elevated levels of a-synuclein autoantibodies in both plasma and CSF in mild PD compared to controls, followed by some decrease in moderate PD. Receiver operating characteristic and effect size analyses confirmed the diagnostic power of a-synuclein antibodies in both plasma and CSF. For the first time, we showed the correlation between plasma and CSF a-synuclein antibody levels for mild, moderate, and combined PD groups. This indicates the potentiality of a-synuclein antibodies as PD biomarker and the increased diagnostic power of their simultaneous analysis in plasma and CSF.

  • 2.
    Horvath, Istvan
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Iashchishyn, Igor
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of General Chemistry, Sumy State University, Sumy 40007, Ukraine.
    Moskalenko, Roman A.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. 3 Department of Pathology, Sumy State University, Sumy 40007, Ukraine.
    Wang, Chao
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Warmlander, Sebastian K. T. S.
    Wallin, Cecilia
    Graslund, Astrid
    Kovacs, Gabor G.
    Morozova-Roche, Ludmilla
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Co-aggregation of pro-inflammatory S100A9 with alpha-synuclein in Parkinson's disease: ex vivo and in vitro studies2018In: Journal of Neuroinflammation, ISSN 1742-2094, E-ISSN 1742-2094, Vol. 15, article id 172Article in journal (Refereed)
    Abstract [en]

    Background: Chronic neuroinflammation is a hallmark of Parkinson's disease (PD) pathophysiology, associated with increased levels of pro-inflammatory factors in PD brain tissues. The pro-inflammatory mediator and highly amyloidogenic protein S100A9 is involved in the amyloid-neuroinflammatory cascade in Alzheimer's disease. This is the first report on the co-aggregation of alpha-synuclein (alpha-syn) and S100A9 both in vitro and ex vivo in PD brain.

    Methods: Single and sequential immunohistochemistry, immunofluorescence, scanning electron and atomic force (AFM) microscopies were used to analyze the ex vivo PD brain tissues for S100A9 and alpha-syn location and aggregation. In vitro studies revealing S100A9 and alpha-syn interaction and co-aggregation were conducted by NMR, circular dichroism, Thioflavin-T fluorescence, AFM, and surface plasmon resonance methods.

    Results: Co-localized and co-aggregated S100A9 and alpha-syn were found in 20% Lewy bodies and 77% neuronal cells in the substantia nigra; both proteins were also observed in Lewy bodies in PD frontal lobe (Braak stages 4-6). Lewy bodies were characterized by ca. 10-23 mu m outer diameter, with S100A9 and alpha-syn being co-localized in the same lamellar structures. S100A9 was also detected in neurons and blood vessels of the aged patients without PD, but in much lesser extent. In vitro S100A9 and alpha-syn were shown to interact with each other via the alpha-syn C-terminus with an apparent dissociation constant of ca. 5 mu M. Their co-aggregation occurred significantly faster and led to formation of larger amyloid aggregates than the self-assembly of individual proteins. S100A9 amyloid oligomers were more toxic than those of alpha-syn, while co-aggregation of both proteins mitigated the cytotoxicity of S100A9 oligomers.

    Conclusions: We suggest that sustained neuroinflammation promoting the spread of amyloidogenic S100A9 in the brain tissues may trigger the amyloid cascade involving alpha-syn and S100A9 and leading to PD, similar to the effect of S100A9 and A beta co-aggregation in Alzheimer's disease. The finding of S100A9 involvement in PD may open a new avenue for therapeutic interventions targeting S100A9 and preventing its amyloid self-assembly in affected brain tissues.

  • 3.
    Iashchishyn, Igor A.
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of General Chemistry, Sumy State University, Sumy, Ukraine.
    Gruden, Marina A.
    Moskalenko, Roman A.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of Pathology, Sumy State University, Sumy, Ukraine .
    Davydova, Tatiana, V
    Wang, Chao
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Sewell, Robert D. E.
    Morozova-Roche, Ludmilla A.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Intranasally Administered S100A9 Amyloids Induced Cellular Stress, Amyloid Seeding, and Behavioral Impairment in Aged Mice2018In: ACS Chemical Neuroscience, ISSN 1948-7193, E-ISSN 1948-7193, Vol. 9, no 6, p. 1338-1348Article in journal (Refereed)
    Abstract [en]

    Amyloid formation and neuroinflammation are major features of Alzheimer's disease pathology. Proinflammatory mediator S100A9 was shown to act as a link between the amyloid and neuroinflammatory cascades in Alzheimer's disease, leading together with Aβ to plaque formation, neuronal loss and memory impairment. In order to examine if S100A9 alone in its native and amyloid states can induce neuronal stress and memory impairment, we have administered S100A9 species intranasally to aged mice. Single and sequential immunohistochemistry and passive avoidance behavioral test were conducted to evaluate the consequences. Administered S100A9 species induced widespread cellular stress responses in cerebral structures, including frontal lobe, hippocampus and cerebellum. These were manifested by increased levels of S100A9, Box, and to a lesser extent activated caspase-3 immunopositive cells. Upon administration of S100A9 fibrils, the amyloid oligomerization was observed in the brain tissues, which can further exacerbate cellular stress. The cellular stress responses correlated with significantly increased training and decreased retention latencies measured in the passive avoidance test for the SI00A9 treated animal groups. Remarkably, the effect size in the behavioral tests was moderate already in the group treated with native S100A9, while the effect sizes were large in the groups administered S100A9 amyloid oligomers or fibrils. The findings demonstrate the brain susceptibility to neurotoxic damage of S100A9 species leading to behavioral and memory impairments. Intranasal administration of S100A9 species proved to be an effective method to study amyloid induced brain dysfunctions, and 5100A9 itself may be postulated as a target to allay early stage neurodegenerative and neuroinflammatory processes.

  • 4.
    Iashchishyn, Igor A.
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of General Chemistry, Sumy State University, Sumy, Ukraine.
    Sulskis, Darius
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of Biothermodynamics and Drug Design, Institute of Biotechnology, Vilnius University, Vilnius, Lithuania.
    Ngoc, Mai Nguyen
    Smirnovas, Vytautas
    Morozova-Roche, Ludmilla A.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Finke-Watzky Two-Step Nucleation-Autocatalysis Model of S100A9 Amyloid Formation: Protein Misfolding as "Nucleation" Event2017In: ACS Chemical Neuroscience, ISSN 1948-7193, E-ISSN 1948-7193, Vol. 8, no 10, p. 2152-2158Article in journal (Refereed)
    Abstract [en]

    Quantitative kinetic analysis is critical for understanding amyloid mechanisms. Here we demonstrate the application of generic Finke-Watzky (F-W) two-step nucleation-autocatalytic growth model to the concentration-dependent amyloid kinetics of proinflammatory alpha-helical S100A9 protein at pH 7.4 and at 37 and 42 degrees C. The model is based on two pseudoelementary reaction steps applied without further analytical constraints, and its treatment of S100A9 amyloid self-assembly demonstrates that initial misfolding and beta-sheet formation, defined as "nucleation" step, spontaneously takes place within individual S100A9 molecules at higher rate than the subsequent fibrillar growth. The latter, described as an autocatalytic process, will proceed if misfolded amyloid-prone S100A9 is populated on a macroscopic time scale. Short lengths of S100A9 fibrils are consistent with the F-W model. The analysis of fibrillar length distribution by the Beker-Doring model demonstrates independently that such distribution is solely determined by slow fibril growth and there is no fragmentation or secondary pathways decreasing fibrillar length.

  • 5.
    Pansieri, Jonathan
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Ostojic, Lucija
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Iashchishyn, Igor
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Magzoub, Mazin
    Wallin, Cecilia
    Warmlander, Sebastian K. T. S.
    Graslund, Astrid
    Ngoc, Mai Nguyen
    Smirnovas, Vytautas
    Svedruzic, Zeljko
    Morozova-Roche, Ludmilla
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Pro-Inflammatory S100A9 Protein Aggregation Promoted by NCAM1 Peptide Constructs2019In: ACS Chemical Biology, ISSN 1554-8929, E-ISSN 1554-8937, Vol. 14, no 7, p. 1410-1417Article in journal (Refereed)
    Abstract [en]

    Amyloid cascade and neuroinflammation are hallmarks of neurodegenerative diseases, and pro-inflammatory S100A9 protein is central to both of them. Here, we have shown that NCAM1 peptide constructs carrying polycationic sequences derived from A beta peptide (KKLVFF) and PrP protein (KKRPKP) significantly promote the S100A9 amyloid self-assembly in a concentration-dependent manner by making transient interactions with individual S100A9 molecules, perturbing its native structure and acting as catalysts. Since the individual molecule misfolding is a rate-limiting step in S100A9 amyloid aggregation, the effects of the NCAM1 construct on the native S100A9 are so critical for its amyloid self-assembly. S100A9 rapid self assembly into large aggregated clumps may prevent its amyloid tissue propagation, and by modulating S100A9 aggregation as a part of the amyloid cascade, the whole process may be effectively tuned.

  • 6.
    Wang, Chao
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Iashchishyn, Igor
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Kara, John
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Fodera, Vito
    Vetri, Valeria
    Sancataldo, Giuseppe
    Marklund, Niklas
    Morozova-Roche, Ludmilla
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Proinflammatory and amyloidogenic S100A9 induced by traumatic brain injury in mouse model2019In: Neuroscience Letters, ISSN 0304-3940, E-ISSN 1872-7972, Vol. 699, p. 199-205Article in journal (Refereed)
    Abstract [en]

    Traumatic brain injury (TBI) represents a significant risk factor for development of neurodegenerative diseases such as Alzheimer's and Parkinson's. The S100A9-driven amyloid-neuroinflammatory cascade occurring during primary and secondary TBI events can serve as a mechanistic link between TBI and Alzheimer's as demonstrated recently in the human brain tissues. Here by using immunohistochemistry in the controlled cortical impact TBI mouse model we have found pro-inflammatory S100A9 in the brain tissues of all mice on the first and third post- TBI days, while 70% of mice did not show any S100A9 presence on seventh post-TBI day similar to controls. This indicates that defensive mechanisms effectively cleared S100A9 in these mouse brain tissues during post-TBI recovery. By using sequential immunohistochemistry we have shown that S100A9 was produced by both neuronal and microglial cells. However, A beta peptide deposits characteristic for Alzheimer's disease were not detected in any post-TBI animals. On the first and third post-TBI days S100A9 was found to aggregate intracellularly into amyloid oligomers, similar to what was previously observed in human TBI tissues. Complementary, by using Rayleigh scatting, intrinsic fluorescence and atomic force microscopy we demonstrated that in vitro S100A9 self- assembles into amyloid oligomers within minutes. Its amyloid aggregation is highly dependent on changes of environmental conditions such as variation of calcium levels, pH, temperature and reduction/oxidation, which might be relevant to perturbation of cellular and tissues homeostasis under TBI. Present results demonstrate that S100A9 induction mechanisms in TBI are similar in mice and humans, emphasizing that S100A9 is an important marker of brain injury and therefore can be a potential therapeutic target.

  • 7.
    Wang, Chao
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Iashchishyn, Igor
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Nyström, Sofie
    Klementieva, Oxana
    Kara, John
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Bengtsson, Sara
    Umeå University, Faculty of Medicine, Department of Clinical Sciences.
    Foderà, Vito
    Vetri, Valeria
    Sancataldo, Giuseppe
    Horvath, Istvan
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Moskalenko, Roman
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of Pathology, Sumy State University, Sumy, Ukraine.
    Rofougaran, Reza
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Bäckström, Torbjörn
    Umeå University, Faculty of Medicine, Department of Clinical Sciences.
    Wang, Mingde
    Umeå University, Faculty of Medicine, Department of Clinical Sciences.
    Gouras, Gunnar
    Marklund, Niklas
    Shankar, S.K.
    Morozova-Roche, Ludmilla
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    S100A9-driven amyloid-neuroinflammatory cascade in traumatic brain injury as a risk factor for Alzheimer’s diseaseManuscript (preprint) (Other academic)
  • 8.
    Wang, Chao
    et al.
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Iashchishyn, Igor
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of General Chemistry, Sumy State University, Sumy, 40000, Ukraine.
    Pansieri, Jonathan
    Nyström, Sofie
    Klementieva, Oxana
    Kara, John
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Horvath, Istvan
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Moskalenko, Roman
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics. Department of Pathology, Sumy State University, Sumy, 40000, Ukraine.
    Rofougaran, Reza
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    Gouras, Gunnar
    Kovacs, Gabor G.
    Shankar, S. K.
    Morozova-Roche, Ludmilla
    Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
    S100A9-Driven Amyloid-Neuroinflammatory Cascade in Traumatic Brain Injury as a Precursor State for Alzheimer's Disease2018In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 8, article id 12836Article in journal (Refereed)
    Abstract [en]

    Pro-inflammatory and amyloidogenic S100A9 protein is an important contributor to Alzheimer's disease (AD) pathology. Traumatic brain injury (TBI) is viewed as a precursor state for AD. Here we have shown that S100A9-driven amyloid-neuroinflammatory cascade was initiated in TBI and may serve as a mechanistic link between TBI and AD. By analyzing the TBI and AD human brain tissues, we demonstrated that in post-TBI tissues S100A9, produced by neurons and microglia, becomes drastically abundant compared to A beta and contributes to both precursor-plaque formation and intracellular amyloid oligomerization. Conditions implicated in TBI, such as elevated S100A9 concentration, acidification and fever, provide strong positive feedback for S100A9 nucleation-dependent amyloid formation and delay in its proteinase clearance. Consequently, both intracellular and extracellular S100A9 oligomerization correlated with TBI secondary neuronal loss. Common morphology of TBI and AD plaques indicated their similar initiation around multiple aggregation centers. Importantly, in AD and TBI we found S100A9 plaques without A beta. S100A9 and A beta plaque pathology was significantly advanced in AD cases with TBI history at earlier age, signifying TBI as a risk factor. These new findings highlight the detrimental consequences of prolonged post-TBI neuroinflammation, which can sustain S100A9-driven amyloid-neurodegenerative cascade as a specific mechanism leading to AD development.

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