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Leppilahti JM, Tervahartiala T, Kautiainen H, Räisänen I, Ahonen M, Uitto V, Sorsa T, Mäntylä P. Correlations between different protein species of oral rinse MMP-8 and patient-related factors. Clin Exp Dent Res 2023; 9:1021-1033. [PMID: 37877535 PMCID: PMC10728547 DOI: 10.1002/cre2.803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 09/25/2023] [Accepted: 10/12/2023] [Indexed: 10/26/2023] Open
Abstract
OBJECTIVES The aim of this study is to examine correlations between different oral rinse matrix metalloproteinase (MMP)-8 protein species in western blot (WB) analysis, quantitative MMP-8 measurements, and patient-related factors. Elevated activated MMP-8 (aMMP-8) associate with periodontitis and a diagnostic point-of-care technology has been developed based on aMMP-8. In WB, different MMP-8 protein species can be analyzed. Relative abundancy of fragmented 20-25 kDa forms in WB has been associated with and reflects MMP-8 activation and related fragmentation and elevated quantitative aMMP-8 measurements. MATERIAL AND METHODS A random sample of 192 participants from a periodontal disease screening study was used for this study. Oral rinse samples for biomarker analyses were collected before clinical periodontal examinations. aMMP-8 immunofluorometric (IFMA) and WB analysis (utilizing the same monoclonal antibody, 8708), polymorphonuclear leukocyte (PMN) elastase activity test and tissue inhibitor of metalloproteinases (TIMP)-1 ELISA levels were performed from the oral rinse samples. Distinct MMP-8 protein species were differentiated in the WB analysis. Principal component (PC) analysis was conducted to explore correlation patterns between the different species. Adjusted correlation analysis between the extracted PCs of WB and aMMP-8 IFMA levels and multilevel regression analysis were conducted to explore if the other periodontal disease-related biomarkers and clinical surrogate measures and patient-related factors are co-variating with the extracted components. RESULTS Distinct correlation patterns between the MMP-8 protein species were observed. The first four PCs explained 89% of the whole variance in PC analysis. Statistically significant correlation (p < 0.05) were observed as follows: PC1 positively with 21 kDa (r = .69) and 25 kDa fragments (r = .55) and negatively with 150 kDa complexes (r = -.46). PC2 correlated with 45 (r = .70) and 55 kDa (r = .65) activated forms, PC3 with 70-80 kDa latent proforms (r = .63) and 90-100 kDa complexes (r = .67), and PC4 with 35 kDa fragments (r = .81). There were significant correlations between quantitative (IFMA) aMMP-8 measurements and PC1 (p < 0.001), PC2 (<0.05) and PC3 (<0.05) but not with PC4. In multilevel regression models age, PMN elastase activity, TIMP-1 levels, and a number of 4-5 mm periodontal pockets were associated with PC1, nonsmoking with PC2, age and PMN elastase activity with PC3, and age and smoking with PC4. CONCLUSIONS Relative abundancy of fragmented 21-25 kDa protein species was correlated with the quantitative aMMP-8 (IFMA) measurements, which is in line with previous results. Different patient-related factors (smoking, age, proteolytic activity) may modify the formation of different MMP-8 protein species in oral rinse samples and may cause variability in quantitative aMMP-8 measurement.
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Affiliation(s)
- Jussi M. Leppilahti
- Research Unit of Population Health, Faculty of MedicineUniversity of OuluOuluFinland
| | - Taina Tervahartiala
- Department of Oral and Maxillofacial DiseasesUniversity of Helsinki and Helsinki University HospitalHelsinkiFinland
| | - Hannu Kautiainen
- Primary Health Care UnitKuopio University HospitalKuopioFinland
- Folkhälsan Research CenterHelsinkiFinland
| | - Ismo Räisänen
- Department of Oral and Maxillofacial DiseasesUniversity of Helsinki and Helsinki University HospitalHelsinkiFinland
| | - Minna‐Maija Ahonen
- Unit of Dental Health Care ServicesKeski‐Uudenmaan hyvinvointialue (KEUSOTE)HyvinkääFinland
| | - Veli‐Jukka Uitto
- Department of Oral and Maxillofacial DiseasesUniversity of Helsinki and Helsinki University HospitalHelsinkiFinland
| | - Timo Sorsa
- Department of Oral and Maxillofacial DiseasesUniversity of Helsinki and Helsinki University HospitalHelsinkiFinland
- Division of Periodontology, Department of Dental MedicineKarolinska InstitutetStockholmSweden
| | - Päivi Mäntylä
- Institute of DentistryUniversity of Eastern FinlandKuopioFinland
- Oral and Maxillofacial DiseasesKuopio University HospitalKuopioFinland
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Moulder R, Välikangas T, Hirvonen MK, Suomi T, Brorsson CA, Lietzén N, Bruggraber SFA, Overbergh L, Dunger DB, Peakman M, Chmura PJ, Brunak S, Schulte AM, Mathieu C, Knip M, Elo LL, Lahesmaa R. Targeted serum proteomics of longitudinal samples from newly diagnosed youth with type 1 diabetes distinguishes markers of disease and C-peptide trajectory. Diabetologia 2023; 66:1983-1996. [PMID: 37537394 PMCID: PMC10542287 DOI: 10.1007/s00125-023-05974-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/06/2023] [Indexed: 08/05/2023]
Abstract
AIMS/HYPOTHESIS There is a growing need for markers that could help indicate the decline in beta cell function and recognise the need and efficacy of intervention in type 1 diabetes. Measurements of suitably selected serum markers could potentially provide a non-invasive and easily applicable solution to this challenge. Accordingly, we evaluated a broad panel of proteins previously associated with type 1 diabetes in serum from newly diagnosed individuals during the first year from diagnosis. To uncover associations with beta cell function, comparisons were made between these targeted proteomics measurements and changes in fasting C-peptide levels. To further distinguish proteins linked with the disease status, comparisons were made with measurements of the protein targets in age- and sex-matched autoantibody-negative unaffected family members (UFMs). METHODS Selected reaction monitoring (SRM) mass spectrometry analyses of serum, targeting 85 type 1 diabetes-associated proteins, were made. Sera from individuals diagnosed under 18 years (n=86) were drawn within 6 weeks of diagnosis and at 3, 6 and 12 months afterwards (288 samples in total). The SRM data were compared with fasting C-peptide/glucose data, which was interpreted as a measure of beta cell function. The protein data were further compared with cross-sectional SRM measurements from UFMs (n=194). RESULTS Eleven proteins had statistically significant associations with fasting C-peptide/glucose. Of these, apolipoprotein L1 and glutathione peroxidase 3 (GPX3) displayed the strongest positive and inverse associations, respectively. Changes in GPX3 levels during the first year after diagnosis indicated future fasting C-peptide/glucose levels. In addition, differences in the levels of 13 proteins were observed between the individuals with type 1 diabetes and the matched UFMs. These included GPX3, transthyretin, prothrombin, apolipoprotein C1 and members of the IGF family. CONCLUSIONS/INTERPRETATION The association of several targeted proteins with fasting C-peptide/glucose levels in the first year after diagnosis suggests their connection with the underlying changes accompanying alterations in beta cell function in type 1 diabetes. Moreover, the direction of change in GPX3 during the first year was indicative of subsequent fasting C-peptide/glucose levels, and supports further investigation of this and other serum protein measurements in future studies of beta cell function in type 1 diabetes.
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Affiliation(s)
- Robert Moulder
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
| | - Tommi Välikangas
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
| | - M Karoliina Hirvonen
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
| | - Tomi Suomi
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland
| | - Caroline A Brorsson
- Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Niina Lietzén
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland
| | | | - Lut Overbergh
- Katholieke Universiteit Leuven/Universitaire Ziekenhuizen, Leuven, Belgium
| | - David B Dunger
- Department of Paediatrics, University of Cambridge, Cambridge, UK
| | - Mark Peakman
- Immunology & Inflammation Research Therapeutic Area, Sanofi, Boston, MA, USA
| | - Piotr J Chmura
- Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Soren Brunak
- Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Chantal Mathieu
- Katholieke Universiteit Leuven/Universitaire Ziekenhuizen, Leuven, Belgium
| | - Mikael Knip
- Pediatric Research Center, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Tampere Center for Child Health Research, Tampere University Hospital, Tampere, Finland
| | - Laura L Elo
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland.
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland.
- Institute of Biomedicine, University of Turku, Turku, Finland.
| | - Riitta Lahesmaa
- Turku Bioscience Centre, University of Turku and Åbo Akademi University, Turku, Finland.
- InFLAMES Research Flagship Center, University of Turku, Turku, Finland.
- Institute of Biomedicine, University of Turku, Turku, Finland.
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Pulkkinen LIA, Barrass SV, Lindgren M, Pace H, Överby AK, Anastasina M, Bally M, Lundmark R, Butcher SJ. Simultaneous membrane and RNA binding by tick-borne encephalitis virus capsid protein. PLoS Pathog 2023; 19:e1011125. [PMID: 36787339 PMCID: PMC9970071 DOI: 10.1371/journal.ppat.1011125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/27/2023] [Accepted: 01/16/2023] [Indexed: 02/15/2023] Open
Abstract
Tick-borne encephalitis virus is an enveloped, pathogenic, RNA virus in the family Flaviviridae, genus Flavivirus. Viral particles are formed when the nucleocapsid, consisting of an RNA genome and multiple copies of the capsid protein, buds through the endoplasmic reticulum membrane and acquires the viral envelope and the associated proteins. The coordination of the nucleocapsid components to the sites of assembly and budding are poorly understood. Here, we investigate the interactions of the wild-type and truncated capsid proteins with membranes with biophysical methods and model membrane systems. We show that capsid protein initially binds membranes via electrostatic interactions with negatively-charged lipids, which is followed by membrane insertion. Additionally, we show that membrane-bound capsid protein can recruit viral genomic RNA. We confirm the biological relevance of the biophysical findings by using mass spectrometry to show that purified virions contain negatively-charged lipids. Our results suggest that nucleocapsid assembly is coordinated by negatively-charged membrane patches on the endoplasmic reticulum and that the capsid protein mediates direct contacts between the nucleocapsid and the membrane.
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Affiliation(s)
- Lauri Ilmari Aurelius Pulkkinen
- Faculty of Biological and Environmental Sciences, Molecular and Integrative Bioscience Research Programme, University of Helsinki, Helsinki, Finland
- Helsinki Institute of Life Sciences-Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Sarah Victoria Barrass
- Faculty of Biological and Environmental Sciences, Molecular and Integrative Bioscience Research Programme, University of Helsinki, Helsinki, Finland
- Helsinki Institute of Life Sciences-Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Marie Lindgren
- Department of Clinical Microbiology, Faculty of Medicine, Umeå University, Umeå, Sweden
- The Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, Umeå, Sweden
| | - Hudson Pace
- Department of Clinical Microbiology, Faculty of Medicine, Umeå University, Umeå, Sweden
- Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden
| | - Anna K. Överby
- Department of Clinical Microbiology, Faculty of Medicine, Umeå University, Umeå, Sweden
- The Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, Umeå, Sweden
| | - Maria Anastasina
- Faculty of Biological and Environmental Sciences, Molecular and Integrative Bioscience Research Programme, University of Helsinki, Helsinki, Finland
- Helsinki Institute of Life Sciences-Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Marta Bally
- Department of Clinical Microbiology, Faculty of Medicine, Umeå University, Umeå, Sweden
- Wallenberg Centre for Molecular Medicine, Umeå University, Umeå, Sweden
| | - Richard Lundmark
- The Laboratory for Molecular Infection Medicine Sweden (MIMS), Umeå University, Umeå, Sweden
- Department of Integrative Medical Biology, Faculty of Medicine, Umeå University, Umeå, Sweden
- * E-mail: (SJB); (RL)
| | - Sarah Jane Butcher
- Faculty of Biological and Environmental Sciences, Molecular and Integrative Bioscience Research Programme, University of Helsinki, Helsinki, Finland
- Helsinki Institute of Life Sciences-Institute of Biotechnology, University of Helsinki, Helsinki, Finland
- * E-mail: (SJB); (RL)
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Tuovinen EA, Pöysti S, Hamdan F, Le KM, Keskitalo S, Turunen T, Minier L, Mamia N, Heiskanen K, Varjosalo M, Cerullo V, Kere J, Seppänen MRJ, Hänninen A, Grönholm J. Characterization of Expanded Gamma Delta T Cells from Atypical X-SCID Patient Reveals Preserved Function and IL2RG-Mediated Signaling. J Clin Immunol 2023; 43:358-370. [PMID: 36260239 PMCID: PMC9892142 DOI: 10.1007/s10875-022-01375-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 09/25/2022] [Indexed: 02/05/2023]
Abstract
Abnormally high γδ T cell numbers among individuals with atypical SCID have been reported but detailed immunophenotyping and functional characterization of these expanded γδ T cells are limited. We have previously reported atypical SCID phenotype caused by hypomorphic IL2RG (NM_000206.3) c.172C > T;p.(Pro58Ser) variant. Here, we have further investigated the index patient's abnormally large γδ T cell population in terms of function and phenotype by studying IL2RG cell surface expression, STAT tyrosine phosphorylation and blast formation in response to interleukin stimulation, immunophenotyping, TCRvγ sequencing, and target cell killing. In contrast to his ⍺β T cells, the patient's γδ T cells showed normal IL2RG cell surface expression and normal or enhanced IL2RG-mediated signaling. Vδ2 + population was proportionally increased with a preponderance of memory phenotypes and high overall tendency towards perforin expression. The patient's γδ T cells showed enhanced cytotoxicity towards A549 cancer cells. His TCRvγ repertoire was versatile but sequencing of IL2RG revealed a novel c.534C > A; p.(Phe178Leu) somatic missense variant restricted to γδ T cells. Over time this variant became predominant in γδ T cells, though initially present only in part of them. IL2RG-Pro58Ser/Phe178Leu variant showed higher cell surface expression compared to IL2RG-Pro58Ser variant in stable HEK293 cell lines, suggesting that somatic p.(Phe178Leu) variant may at least partially rescue the pathogenic effect of germline p.(Pro58Ser) variant. In conclusion, our report indicates that expansion of γδ T cells associated with atypical SCID needs further studying and cannot exclusively be deemed as a homeostatic response to low numbers of conventional T cells.
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Affiliation(s)
- Elina A Tuovinen
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
- Pediatric Research Center, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
| | - Sakari Pöysti
- Department of Clinical Microbiology and Immunology, Turku University Hospital, Turku, Finland
| | - Firas Hamdan
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Drug Research Program Helsinki (DRP), Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
- Digital Precision Cancer Medicine Flagship (iCAN), University of Helsinki, Helsinki, Finland
| | - Kim My Le
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Pediatric Research Center, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
| | - Salla Keskitalo
- Systems Biology Research Group and Proteomics Unit, Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Tanja Turunen
- Systems Biology Research Group and Proteomics Unit, Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Léa Minier
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Faculty of Science and Technology, University of Lille, Lille, France
| | - Nanni Mamia
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Pediatric Research Center, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
| | - Kaarina Heiskanen
- Pediatric Research Center, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
- Children's Immunodeficiency Unit, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
| | - Markku Varjosalo
- Systems Biology Research Group and Proteomics Unit, Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Vincenzo Cerullo
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Drug Research Program Helsinki (DRP), Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
- Digital Precision Cancer Medicine Flagship (iCAN), University of Helsinki, Helsinki, Finland
| | - Juha Kere
- Folkhälsan Research Center, Helsinki, Finland
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
- Stem Cells and Metabolism Research Program, University of Helsinki, Helsinki, Finland
| | - Mikko R J Seppänen
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Pediatric Research Center, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
- Rare Diseases Center and Pediatric Research Center, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland
| | - Arno Hänninen
- Department of Clinical Microbiology and Immunology, Turku University Hospital, Turku, Finland
| | - Juha Grönholm
- Translational Immunology Research Program, University of Helsinki, Helsinki, Finland.
- Pediatric Research Center, New Children's Hospital, University of Helsinki and HUS Helsinki University Hospital, Helsinki, Finland.
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Valkonen K, Mäkelä JP, Airaksinen K, Nurminen J, Kivisaari R, Renvall H, Pekkonen E. Deep brain stimulation of subthalamic nucleus modulates cortical auditory processing in advanced Parkinson’s Disease. PLoS One 2022; 17:e0264333. [PMID: 35202426 PMCID: PMC8870490 DOI: 10.1371/journal.pone.0264333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 02/08/2022] [Indexed: 12/02/2022] Open
Abstract
Deep brain stimulation (DBS) has proven its clinical efficacy in Parkinson’s disease (PD), but its exact mechanisms and cortical effects continue to be unclear. Subthalamic (STN) DBS acutely modifies auditory evoked responses, but its long-term effect on auditory cortical processing remains ambiguous. We studied with magnetoencephalography the effect of long-term STN DBS on auditory processing in patients with advanced PD. DBS resulted in significantly increased contra-ipsilateral auditory response latency difference at ~100 ms after stimulus onset compared with preoperative state. The effect is likely due to normalization of neuronal asynchrony in the auditory pathways. The present results indicate that STN DBS in advanced PD patients has long-lasting effects on cortical areas outside those confined to motor processing. Whole-head magnetoencephalography provides a feasible tool to study motor and non-motor neural networks in PD, and to track possible changes related to cortical reorganization or plasticity induced by DBS.
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Affiliation(s)
- Kati Valkonen
- Department of Neurology, Helsinki University Hospital, Finland and Department of Clinical Neurosciences (Neurology), University of Helsinki, Helsinki, Finland
- BioMag Laboratory, Helsinki University Hospital Medical Imaging Center, Helsinki University Hospital, Helsinki University and Aalto University School of Science, Helsinki, Finland
| | - Jyrki P. Mäkelä
- BioMag Laboratory, Helsinki University Hospital Medical Imaging Center, Helsinki University Hospital, Helsinki University and Aalto University School of Science, Helsinki, Finland
| | - Katja Airaksinen
- Department of Neurology, Helsinki University Hospital, Finland and Department of Clinical Neurosciences (Neurology), University of Helsinki, Helsinki, Finland
| | - Jussi Nurminen
- BioMag Laboratory, Helsinki University Hospital Medical Imaging Center, Helsinki University Hospital, Helsinki University and Aalto University School of Science, Helsinki, Finland
| | - Riku Kivisaari
- Department of Neurosurgery, Helsinki University Hospital, Helsinki, Finland
| | - Hanna Renvall
- BioMag Laboratory, Helsinki University Hospital Medical Imaging Center, Helsinki University Hospital, Helsinki University and Aalto University School of Science, Helsinki, Finland
- Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo, Finland
- * E-mail:
| | - Eero Pekkonen
- Department of Neurology, Helsinki University Hospital, Finland and Department of Clinical Neurosciences (Neurology), University of Helsinki, Helsinki, Finland
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Rautalin IM, Sebök M, Germans MR, Korja M, Dannecker N, Zindel-Geisseler O, Brugger P, Regli L, Stienen MN. Screening tools for early neuropsychological impairment after aneurysmal subarachnoid hemorrhage. Neurol Sci 2020; 41:817-824. [PMID: 31802342 PMCID: PMC7160061 DOI: 10.1007/s10072-019-04159-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 11/14/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Although most aneurysmal subarachnoid hemorrhage (aSAH) patients suffer from neuropsychological disabilities, outcome estimation is commonly based only on functional disability scales such as the modified Rankin Scale (mRS). Moreover, early neuropsychological screening tools are not used routinely. OBJECTIVE To study whether two simple neuropsychological screening tools identify neuropsychological deficits (NPDs), among aSAH patients categorized with favorable outcome (mRS 0-2) at discharge. METHODS We reviewed 170 consecutive aSAH patients that were registered in a prospective institutional database. We included all patients graded by the mRS at discharge, and who had additionally been evaluated by a neuropsychologist and/or occupational therapist using the Montreal Cognitive Assessment (MoCA) and/or Rapid Evaluation of Cognitive Function (ERFC). The proportion of patients with scores indicative of NPDs in each test were reported, and spearman correlation tests calculated the coefficients between the both neuropsychological test results and the mRS. RESULTS Of the 42 patients (24.7%) that were evaluated by at least one neuropsychological test, 34 (81.0%) were rated mRS 0-2 at discharge. Among these 34 patients, NPDs were identified in 14 (53.9%) according to the MoCA and 8 (66.7%) according to the ERFC. The mRS score was not correlated with the performance in the MoCA or ERFC. CONCLUSION The two screening tools implemented here frequently identified NPDs among aSAH patients that were categorized with favorable outcome according to the mRS. Our results suggest that MoCA or ERFC could be used to screen early NPDs in favorable outcome patients, who in turn might benefit from early neuropsychological rehabilitation.
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Affiliation(s)
- Ilari M Rautalin
- Department of Neurosurgery, University Hospital Zurich & Clinical Neuroscience Center University of Zurich, Zurich, Switzerland.
- Department of Neurosurgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
| | - Martina Sebök
- Department of Neurosurgery, University Hospital Zurich & Clinical Neuroscience Center University of Zurich, Zurich, Switzerland
| | - Menno R Germans
- Department of Neurosurgery, University Hospital Zurich & Clinical Neuroscience Center University of Zurich, Zurich, Switzerland
| | - Miikka Korja
- Department of Neurosurgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Noemi Dannecker
- Neuropsychology Unit, Department of Neurology, University Hospital Zurich & Clinical Neuroscience Center, University of Zurich, Zurich, Switzerland
| | - Olivia Zindel-Geisseler
- Neuropsychology Unit, Department of Neurology, University Hospital Zurich & Clinical Neuroscience Center, University of Zurich, Zurich, Switzerland
| | - Peter Brugger
- Neuropsychology Unit, Department of Neurology, University Hospital Zurich & Clinical Neuroscience Center, University of Zurich, Zurich, Switzerland
| | - Luca Regli
- Department of Neurosurgery, University Hospital Zurich & Clinical Neuroscience Center University of Zurich, Zurich, Switzerland
| | - Martin N Stienen
- Department of Neurosurgery, University Hospital Zurich & Clinical Neuroscience Center University of Zurich, Zurich, Switzerland
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Saarinen T, Meriläinen S, Koivukangas V, Pietiläinen KH, Juuti A. Prospective randomized controlled trial comparing the efficacy and safety of Roux-en-Y gastric bypass and one-anastomosis gastric bypass (the RYSA trial): trial protocol and interim analysis. Trials 2019; 20:803. [PMID: 31888729 PMCID: PMC6937917 DOI: 10.1186/s13063-019-3898-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 11/08/2019] [Indexed: 01/16/2023] Open
Abstract
INTRODUCTION There is a lack of prospective studies comparing Roux-en-Y gastric bypass (RYGB) and one-anastomosis gastric bypass (OAGB). Also, the effects of bariatric surgery and weight loss need a deeper understanding through metabolic studies. We describe the trial protocol and interim analysis of a prospective randomized controlled study comparing RYGB and OAGB: the RYSA trial. MATERIALS AND METHODS In total, 120 bariatric patients will be randomized between RYGB and OAGB in two academic centers. All patients will be followed up for 10 years with analysis and measurements of weight, comorbidities, blood tests, body composition and questionnaires. Extensive metabolic analyses (mixed meal tests, energy expenditure, biopsies of muscle and subcutaneous fat, urine, saliva and fecal samples) will be carried out in the Obesity Research Unit, University of Helsinki, for all patients treated at the Helsinki University Hospital (80 patients) at baseline, 6 months and 12 months. Bile reflux will be studied for the OAGB group at the Helsinki University Hospital at 6 months with gastroscopy and scintigraphy. RESULTS At an interim analysis at 3 months (half-way) through recruitment (30 RYGB and 30 OAGB patients) there have been no deaths and no intensive care unit admittances. One patient in both groups required additional gastroscopy, with anastomosis dilatation in the RYGB group but with no additional intervention in the OAGB group. CONCLUSION The trial can be safely carried out. Recruitment is estimated to be complete by the end of 2019. TRIAL REGISTRATION Clinical Trials Identifier NCT02882685. Registered on August 30th 2016.
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Affiliation(s)
- Tuure Saarinen
- Department of Gastrointestinal Surgery, Helsinki University Hospital, Abdominal Center, Haartmaninkatu 4, 00029 HUS Helsinki, Finland
| | | | | | - Kirsi Hannele Pietiläinen
- Research Program for Clinical and Molecular Metabolism, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Department of Endocrinology, Helsinki University Hospital, Abdominal Center, Helsinki, Finland
| | - Anne Juuti
- Department of Gastrointestinal Surgery, Helsinki University Hospital, Abdominal Center, Haartmaninkatu 4, 00029 HUS Helsinki, Finland
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Sathyanarayanan G, Haapala M, Sikanen T. Interfacing Digital Microfluidics with Ambient Mass Spectrometry Using SU-8 as Dielectric Layer. Micromachines (Basel) 2018; 9:E649. [PMID: 30544772 PMCID: PMC6316065 DOI: 10.3390/mi9120649] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 11/27/2018] [Accepted: 12/06/2018] [Indexed: 01/20/2023]
Abstract
This work describes the interfacing of electrowetting-on-dielectric based digital microfluidic (DMF) sample preparation devices with ambient mass spectrometry (MS) via desorption atmospheric pressure photoionization (DAPPI). The DMF droplet manipulation technique was adopted to facilitate drug distribution and metabolism assays in droplet scale, while ambient mass spectrometry (MS) was exploited for the analysis of dried samples directly on the surface of the DMF device. Although ambient MS is well-established for bio- and forensic analyses directly on surfaces, its interfacing with DMF is scarce and requires careful optimization of the surface-sensitive processes, such as sample precipitation and the subsequent desorption/ionization. These technical challenges were addressed and resolved in this study by making use of the high mechanical, thermal, and chemical stability of SU-8. In our assay design, SU-8 served as the dielectric layer for DMF as well as the substrate material for DAPPI-MS. The feasibility of SU-8 based DMF devices for DAPPI-MS was demonstrated in the analysis of selected pharmaceuticals following on-chip liquid-liquid extraction or an enzymatic dealkylation reaction. The lower limits of detection were in the range of 1⁻10 pmol per droplet (0.25⁻1.0 µg/mL) for all pharmaceuticals tested.
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Affiliation(s)
- Gowtham Sathyanarayanan
- Drug Research Program, Faculty of Pharmacy, Division of Pharmaceutical Chemistry and Technology, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.
| | - Markus Haapala
- Drug Research Program, Faculty of Pharmacy, Division of Pharmaceutical Chemistry and Technology, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.
| | - Tiina Sikanen
- Drug Research Program, Faculty of Pharmacy, Division of Pharmaceutical Chemistry and Technology, University of Helsinki, Viikinkaari 5E, 00790 Helsinki, Finland.
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Sammallahti S, Kajantie E, Matinolli HM, Pyhälä R, Lahti J, Heinonen K, Lahti M, Pesonen AK, Eriksson JG, Hovi P, Järvenpää AL, Andersson S, Raikkonen K. Nutrition after preterm birth and adult neurocognitive outcomes. PLoS One 2017; 12:e0185632. [PMID: 28957424 PMCID: PMC5619810 DOI: 10.1371/journal.pone.0185632] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 09/15/2017] [Indexed: 01/25/2023] Open
Abstract
Background Preterm birth (<37 gestational weeks) poses a risk of poorer neurocognitive functioning. Faster growth after preterm birth predicts better cognitive abilities and can be promoted through adequate nutrition, but it remains unknown whether variations in nutrient intakes translate into long-term benefits for neurodevelopment. Methods In 86 participants of the Helsinki Study of Very Low Birth Weight Adults (birthweight <1500g), we examined if higher intakes of energy, macronutrients, and human milk during the first nine weeks after preterm birth predict performance in tests of cognitive ability at 25.1 years of age (SD = 2.1). Results 10 kcal/kg/day higher total energy intake at 3 to 6 weeks of age was associated with 0.21 SD higher adult IQ (95% Confidence Interval [CI] 0.07–0.35). Higher carbohydrate and fat intake at 3–6 weeks, and higher energy intake from human milk at 3–6 and at 6–9 weeks were also associated with higher adult IQ: these effect sizes ranged from 0.09 SD (95% CI 0.01–0.18) to 0.34 SD (0.14–0.54) higher IQ, per one gram/kg/day more carbohydrate and fat, and per 10 kcal/kg/day more energy from human milk. Adjustment for neonatal complications attenuated the associations: intraventricular hemorrhage, in particular, was associated with both poorer nutrition and poorer IQ. Conclusion In preterm neonates with very low birth weight, higher energy and human milk intake predict better neurocognitive abilities in adulthood. To understand the determinants of these infants' neurocognitive outcome, it seems important to take into account the role of postnatal nutrition, not just as an isolated exposure, but as a potential mediator between neonatal illness and long-term neurodevelopment.
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Affiliation(s)
- Sara Sammallahti
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
- Children’s Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
- National Institute for Health and Welfare, Helsinki, Finland
- * E-mail:
| | - Eero Kajantie
- Children’s Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
- National Institute for Health and Welfare, Helsinki, Finland
- PEDEGO Research Unit, MRC Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | | | - Riikka Pyhälä
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
| | - Jari Lahti
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
- Helsinki Collegium for Advanced Studies, Helsinki, Finland
| | - Kati Heinonen
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
| | - Marius Lahti
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
- University BHF Centre for Cardiovascular Sciences, Queen’s Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Anu-Katriina Pesonen
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
| | - Johan G. Eriksson
- National Institute for Health and Welfare, Helsinki, Finland
- Folkhälsan Research Center, Helsinki, Finland
- Department of General Practice and Primary Health Care, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
- Vasa Central Hospital, Vasa, Finland
| | - Petteri Hovi
- Children’s Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
- National Institute for Health and Welfare, Helsinki, Finland
| | - Anna-Liisa Järvenpää
- Children’s Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Sture Andersson
- Children’s Hospital, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Katri Raikkonen
- Department of Psychology and Logopedics, University of Helsinki, Helsinki, Finland
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Mäkeläinen S, de Knegt HJ, Ovaskainen O, Hanski IK. Home-range use patterns and movements of the Siberian flying squirrel in urban forests: Effects of habitat composition and connectivity. Mov Ecol 2016; 4:5. [PMID: 26893904 PMCID: PMC4758174 DOI: 10.1186/s40462-016-0071-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Accepted: 02/05/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Urbanization causes modification, fragmentation and loss of native habitats. Such landscape changes threaten many arboreal and gliding mammals by limiting their movements through treeless parts of a landscape and by making the landscape surrounding suitable habitat patches more inhospitable. Here, we investigate the effects of landscape structure and habitat availability on the home-range use and movement patterns of the Siberian flying squirrel (Pteromys volans) at different spatial and temporal scales. We followed radio-tagged individuals in a partly urbanized study area in Eastern Finland, and analysed how landscape composition and connectivity affected the length and speed of movement bursts, distances moved during one night, and habitat and nest-site use. RESULTS The presence of urban habitat on movement paths increased both movement lengths and speed whereas nightly distances travelled by males decreased with increasing amount of urban habitat within the home range. The probability of switching from the present nest site to another nest site decreased with increasing distance among the nest sites, but whether the nest sites were connected or unconnected by forests did not have a clear effect on nest switching. Flying squirrels preferred to use mature forests for their movements at night. CONCLUSIONS Our results suggest that the proximity to urban habitats modifies animal movements, possibly because animals try to avoid such habitats by moving faster through them. Urbanization at the scale of an entire home range can restrict their movements. Thus, maintaining a large enough amount of mature forests around inhabited landscape fragments will help protect forest specialists in urban landscapes. The effect of forested connections remains unclear, highlighting the difficulty of measuring and preserving connectivity in a species-specific way.
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Affiliation(s)
- Sanna Mäkeläinen
- />Finnish Museum of Natural History LUOMUS, University of Helsinki, P. O. Box 17 (P. Rautatiekatu 13), Helsinki, FI-00014 Finland
| | - Henrik J de Knegt
- />Department of Biosciences, University of Helsinki, P. O. Box 65 (Viikinkaari 1), FI-00014 Helsinki, Finland
- />Current address: Resource Ecology Group, Wageningen University, Droevendaalsesteeg 3a, Wageningen, 6708 PB The Netherlands
| | - Otso Ovaskainen
- />Department of Biosciences, University of Helsinki, P. O. Box 65 (Viikinkaari 1), FI-00014 Helsinki, Finland
| | - Ilpo K Hanski
- />Finnish Museum of Natural History LUOMUS, University of Helsinki, P. O. Box 17 (P. Rautatiekatu 13), Helsinki, FI-00014 Finland
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