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  • 1.
    Andersson, Annika
    et al.
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Remnestål, Julia
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Nellgård, B.
    Vunk, Helian
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Kotol, David
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Edfors, Fredrik
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Uhlén, Mathias
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Schwenk, Jochen M.
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Ilag, L. L.
    Zetterberg, H.
    Blennow, K.
    Månberg, Anna
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Nilsson, Peter
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap.
    Fredolini, Claudia
    KTH, Centra, Science for Life Laboratory, SciLifeLab. KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics.
    Development of parallel reaction monitoring assays for cerebrospinal fluid proteins associated with Alzheimer's disease2019Inngår i: Clinica Chimica Acta, ISSN 0009-8981, E-ISSN 1873-3492, Vol. 494, s. 79-93Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Detailed knowledge of protein changes in cerebrospinal fluid (CSF) across healthy and diseased individuals would provide a better understanding of the onset and progression of neurodegenerative disorders. In this study, we selected 20 brain-enriched proteins previously identified in CSF by antibody suspension bead arrays (SBA) to be potentially biomarkers for Alzheimer's disease (AD) and verified these using an orthogonal approach. We examined the same set of 94 CSF samples from patients affected by AD (including preclinical and prodromal), mild cognitive impairment (MCI), non-AD dementia and healthy individuals, which had previously been analyzed by SBA. Twenty-eight parallel reaction monitoring (PRM) assays were developed and 13 of them could be validated for protein quantification. Antibody profiles were verified by PRM. For seven proteins, the antibody profiles were highly correlated with the PRM results (r > 0.7) and GAP43, VCAM1 and PSAP were identified as potential markers of preclinical AD. In conclusion, we demonstrate the usefulness of targeted mass spectrometry as a tool for the orthogonal verification of antibody profiling data, suggesting that these complementary methods can be successfully applied for comprehensive exploration of CSF protein levels in neurodegenerative disorders.

  • 2.
    Edfors, Fredrik
    et al.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Forsström, Björn
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Vunk, Helian
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Kotol, David
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Fredolini, Claudia
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Maddalo, Gianluca
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Svensson, Anne-Sophie
    KTH.
    Boström, Tove
    KTH.
    Tegel, Hanna
    KTH.
    Nilsson, Peter
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Schwenk, Jochen M.
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Affinity Proteomics. KTH, Centra, Science for Life Laboratory, SciLifeLab.
    Uhlén, Mathias
    KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Proteinvetenskap, Systembiologi. KTH, Centra, Science for Life Laboratory, SciLifeLab. Karolinska Inst, Dept Neurosci, SE-17165 Solna, Sweden.;Tech Univ Denmark, Novo Nordisk Fdn Ctr Biosustainabil, DK-2970 Horsholm, Denmark..
    Screening a Resource of Recombinant Protein Fragments for Targeted Proteomics2019Inngår i: Journal of Proteome Research, ISSN 1535-3893, E-ISSN 1535-3907, Vol. 18, nr 7, s. 2706-2718Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The availability of proteomics resources hosting protein and peptide standards, as well as the data describing their analytical performances, will continue to enhance our current capabilities to develop targeted proteomics methods for quantitative biology. This study describes the analysis of a resource of 26,840 individually purified recombinant protein fragments corresponding to more than 16,000 human protein-coding genes. The resource was screened to identify proteotypic peptides suitable for targeted proteomics efforts, and we report LC-MS/MS assay coordinates for more than 25,000 proteotypic peptides, corresponding to more than 10,000 unique proteins. Additionally, peptide formation and digestion kinetics were, for a subset of the standards, monitored using a time-course protocol involving parallel digestion of isotope-labeled recombinant protein standards and endogenous human plasma proteins. We show that the strategy by adding isotope-labeled recombinant proteins before trypsin digestion enables short digestion protocols (<= 60 min) with robust quantitative precision. In a proof-of-concept study, we quantified 23 proteins in human plasma using assay parameters defined in our study and used the standards to describe distinct clusters of individuals linked to different levels of LPA, APOE, SERPINAS, and TFRC. In summary, we describe the use and utility of a resource of recombinant proteins to identify proteotypic peptides useful for targeted proteomics assay development.

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