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Słowiński P, White A, Lison S, Sullivan S, Emmens T, Self P, Wileman J, Karl A, Tsaneva-Atanasova K. The potential of digital behavioural tests as a diagnostic aid for psychosis. PLOS Digit Health 2023; 2:e0000339. [PMID: 37713385 PMCID: PMC10503702 DOI: 10.1371/journal.pdig.0000339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 07/29/2023] [Indexed: 09/17/2023]
Abstract
Timely interventions have a proven benefit for people experiencing psychotic illness. One bottleneck to accessing timely interventions is the referral process to the specialist team for early psychosis (STEP). Many general practitioners lack awareness or confidence in recognising psychotic symptoms or state. Additionally, referrals for people without apparent psychotic symptoms, although beneficial at a population level, lead to excessive workload for STEPs. There is a clear unmet need for accurate stratification of STEPs users and healthy cohorts. Here we propose a new approach to addressing this need via the application of digital behavioural tests. To demonstrate that digital behavioural tests can be used to discriminate between the STEPs users (SU; n = 32) and controls (n = 32, age and sex matched), we compared performance of five different classifiers applied to objective, quantitative and interpretable features derived from the 'mirror game' (MG) and trail making task (TMT). The MG is a movement coordination task shown to be a potential socio-motor biomarker of schizophrenia, while TMT is a neuropsychiatric test of cognitive function. All classifiers had AUC in the range of 0.84-0.92. The best of the five classifiers (linear discriminant classifier) achieved an outstanding performance, AUC = 0.92 (95%CI 0.75-1), Sensitivity = 0.75 (95%CI 0.5-1), Specificity = 1 (95%CI 0.75-1), evaluated on 25% hold-out and 1000 folds. Performance of all analysed classifiers is underpinned by the large effect sizes of the differences between the cohorts in terms of the features used for classification what ensures generalisability of the results. We also found that MG and TMT are unsuitable in isolation to successfully differentiate between SU with and without at-risk-mental-state or first episode psychosis with sufficient level of performance. Our findings show that standardised batteries of digital behavioural tests could benefit both clinical and research practice. Including digital behavioural tests into healthcare practice could allow precise phenotyping and stratification of the highly heterogenous population of people referred to STEPs resulting in quicker and more personalised diagnosis. Moreover, the high specificity of digital behavioural tests could facilitate the identification of more homogeneous clinical high-risk populations, benefiting research on prognostic instruments for psychosis. In summary, our study demonstrates that cheap off-the-shelf equipment (laptop computer and a leap motion sensor) can be used to record clinically relevant behavioural data that could be utilised in digital mental health applications.
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Affiliation(s)
- Piotr Słowiński
- Translational Research Exchange @ Exeter, Living Systems Institute, Department of Mathematics and Statistics, Faculty of Environment, Science and Economy, University of Exeter, United Kingdom
| | - Alexander White
- Department of Psychology, Faculty of Health and Life Sciences, University of Exeter, United Kingdom
| | - Sian Lison
- Research & Development Department, Devon Partnership NHS Trust, Exeter, United Kingdom
| | - Sarah Sullivan
- Faculty of Health Sciences, Bristol Medical School, University of Bristol, United Kingdom
| | - Tobit Emmens
- Research & Development Department, Devon Partnership NHS Trust, Exeter, United Kingdom
| | - Philip Self
- Research & Development Department, Devon Partnership NHS Trust, Exeter, United Kingdom
| | - Jane Wileman
- Specialist Team for Early Psychosis, Devon Partnership NHS Trust, Exeter, United Kingdom
| | - Anke Karl
- Department of Psychology, Faculty of Health and Life Sciences, University of Exeter, United Kingdom
| | - Krasimira Tsaneva-Atanasova
- Translational Research Exchange @ Exeter, Living Systems Institute, Department of Mathematics and Statistics, Faculty of Environment, Science and Economy, University of Exeter, United Kingdom
- EPSRC Hub for Quantitative Modelling in Healthcare University of Exeter, Exeter, United Kingdom
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Kruszyna Ł, Strauss E, Tomczak J, Słowiński P, Madycki G, Dzieciuchowicz Ł, Krzemiński A, Stanišic MG, Kasprzak P, Krasiński Z. Outcomes of Covered Endovascular Reconstruction of the Aortic Bifurcation (CERAB) Procedure for the Treatment of Extensive Aortoiliac Occlusive Disease Using the BeGraft Balloon-Expandable Covered Stent: A Multicenter Observational Study. J Endovasc Ther 2023:15266028231180350. [PMID: 37309126 DOI: 10.1177/15266028231180350] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
PURPOSE The covered endovascular reconstruction of the aortic bifurcation (CERAB) technique offers an alternative for Trans-Atlantic Inter-Society Consensus (TASC) C/D lesions involving the aortic bifurcation. The study aims to evaluate the outcomes of the CERAB technique for extensive aortoiliac occlusive disease (AIOD) using the BeGraft balloon-expandable covered stent (BECS). MATERIALS AND METHODS This is a physician-initiated, multicenter, retrospective, observational study. Between June 2017 and June 2021, all consecutive patients who underwent the CERAB procedure using the BeGraft stent (Bentley InnoMed, Hechingen, Germany) in 3 clinics were enrolled. Patients' demographics, lesion characteristics, and procedural results were collected and retrospectively analyzed. Follow-up was done at 1, 6, and 12 months and then annually with clinical examination, ankle-brachial index (ABI), and duplex ultrasound. The primary endpoint was the patency at 12 months. Secondary endpoints included procedural-related complications, secondary patency, freedom from target lesion revascularization (TLR), and clinical improvement. RESULTS In all, 120 patients (64 men) with a median age of 65 years (range: 34-84 years) were analyzed. Most patients had extensive AIOD classified as TASC II C (n=32; 26.7%) or TASC II D (n=81; 67.5%). The median duration of the procedure was 120 minutes (interquartile range [IQR]: 80-180 minutes). All 454 BeGraft stents (137 aortic and 317 peripheral) were successfully delivered and deployed. The overall procedural complication rate was 14 (11.7%). The median hospital length of stay was 5 days (IQR: 3-6 days). All patients improved clinically, and the ABI increased significantly (p<0.05). The median follow-up was 19 months (range: 6-56 months). The primary patency rate, secondary patency rate, and freedom from TLR at 12 months were 94.5%, 97.3%, and 93.5%, respectively. CONCLUSIONS The CERAB procedure with BeGraft BECSs has a high technical success rate, favorable patency outcomes, and low morbidity, even in relatively ill patients with extensive AIOD. Prospective randomized studies on the CERAB technique are definitely recommended. CLINICAL IMPACT This study evaluates the outcomes of BeGraft stents used during the covered endovascular reconstruction of the aortic bifurcation (CERAB) procedure. To date, several balloon-expandable covered stents have been used for this technique with satisfactory results. This study showed the safety and excellent patency of the CERAB technique in extensive AIOD using BeGraft balloon-expandable covered stents.
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Affiliation(s)
- Łukasz Kruszyna
- Department of Vascular and Endovascular Surgery, Angiology and Phlebology, Poznan University of Medical Sciences, Poznan, Poland
| | - Ewa Strauss
- Department of Vascular and Endovascular Surgery, Angiology and Phlebology, Poznan University of Medical Sciences, Poznan, Poland
- Department of Vascular Surgery and Angiology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Jolanta Tomczak
- Department of Vascular and Endovascular Surgery, Angiology and Phlebology, Poznan University of Medical Sciences, Poznan, Poland
| | - Piotr Słowiński
- Department of Vascular Surgery, Institute of Medical Sciences, Collegium Medicum, University of Zielona Góra, Zielona Góra, Poland
| | - Grzegorz Madycki
- Department of Vascular Surgery, Institute of Medical Sciences, Collegium Medicum, University of Zielona Góra, Zielona Góra, Poland
| | | | | | - Michał-Goran Stanišic
- Department of Vascular and Endovascular Surgery, Angiology and Phlebology, Poznan University of Medical Sciences, Poznan, Poland
| | - Piotr Kasprzak
- Department of Vascular and Endovascular Surgery, Angiology and Phlebology, Poznan University of Medical Sciences, Poznan, Poland
- Department of Surgery, Vascular and Endovascular Surgery, University Hospital, University of Regensburg, Regensburg, Germany
| | - Zbigniew Krasiński
- Department of Vascular and Endovascular Surgery, Angiology and Phlebology, Poznan University of Medical Sciences, Poznan, Poland
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3
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Słowiński P, Grindley B, Muncie H, Harris D, Vine S, Wilson M. Assessment of cognitive biases in augmented reality: Beyond eye tracking. J Eye Mov Res 2022; 15. [PMID: 37179771 PMCID: PMC10171922 DOI: 10.16910/jemr.15.3.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
We study an individual’s propensity for rational thinking; the avoidance of cognitive biases (unconscious errors generated by our mental simplification methods) using a novel augmented reality (AR) platform. Specifically, we developed an odd-one-out (OOO) game-like task in AR designed to try to induce and assess confirmatory biases. Forty students completed the AR task in the laboratory, and the short form of the comprehensive assessment of rational thinking (CART) online via the Qualtrics platform. We demonstrate that behavioural markers (based on eye, hand and head movements) can be associated (linear regression) with the short CART score – more rational thinkers have slower head and hand movements and faster gaze movements in the second more ambiguous round of the OOO task. Furthermore, short CART scores can be associated with the change in behaviour between two rounds of the OOO task (one less and one more ambiguous) – hand-eye-head coordination patterns of the more rational thinkers are more consistent in the two rounds. Overall, we demonstrate the benefits of augmenting eye-tracking recordings with additional data modalities when trying to understand complicated behaviours.
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Pacewski B, Słowiński P, Madycki G. The phenomenon of stentgraft “shortening” during endovascular stentgraft implantation into an abdominal aortic aneurysm in cases involving significant tortuosity of the aorta and iliac arteries. Acta Angiologica 2022. [DOI: 10.5603/aa.2022.0009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Evans BD, Słowiński P, Hattersley AT, Jones SE, Sharp S, Kimmitt RA, Weedon MN, Oram RA, Tsaneva-Atanasova K, Thomas NJ. Estimating disease prevalence in large datasets using genetic risk scores. Nat Commun 2021; 12:6441. [PMID: 34750397 PMCID: PMC8575951 DOI: 10.1038/s41467-021-26501-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 09/30/2021] [Indexed: 11/09/2022] Open
Abstract
Clinical classification is essential for estimating disease prevalence but is difficult, often requiring complex investigations. The widespread availability of population level genetic data makes novel genetic stratification techniques a highly attractive alternative. We propose a generalizable mathematical framework for determining disease prevalence within a cohort using genetic risk scores. We compare and evaluate methods based on the means of genetic risk scores' distributions; the Earth Mover's Distance between distributions; a linear combination of kernel density estimates of distributions; and an Excess method. We demonstrate the performance of genetic stratification to produce robust prevalence estimates. Specifically, we show that robust estimates of prevalence are still possible even with rarer diseases, smaller cohort sizes and less discriminative genetic risk scores, highlighting the general utility of these approaches. Genetic stratification techniques offer exciting new research tools, enabling unbiased insights into disease prevalence and clinical characteristics unhampered by clinical classification criteria.
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Affiliation(s)
- Benjamin D Evans
- Department of Mathematics, University of Exeter, North Park Road, Exeter, EX4 4QF, UK.,Living Systems Institute, Centre for Biomedical Modelling and Analysis, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK.,School of Psychological Science, University of Bristol, Priory Road, Bristol, BS8 1TU, UK
| | - Piotr Słowiński
- Department of Mathematics, University of Exeter, North Park Road, Exeter, EX4 4QF, UK.,Living Systems Institute, Translational Research Exchange @ Exeter, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK
| | - Andrew T Hattersley
- University of Exeter Medical School, Institute of Biomedical & Clinical Science, RILD Building, Royal Devon & Exeter Hospital, Barrack Road, Exeter, EX2 5DW, UK.,Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Samuel E Jones
- University of Exeter Medical School, Institute of Biomedical & Clinical Science, RILD Building, Royal Devon & Exeter Hospital, Barrack Road, Exeter, EX2 5DW, UK
| | - Seth Sharp
- University of Exeter Medical School, Institute of Biomedical & Clinical Science, RILD Building, Royal Devon & Exeter Hospital, Barrack Road, Exeter, EX2 5DW, UK
| | - Robert A Kimmitt
- University of Exeter Medical School, Institute of Biomedical & Clinical Science, RILD Building, Royal Devon & Exeter Hospital, Barrack Road, Exeter, EX2 5DW, UK.,Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Michael N Weedon
- University of Exeter Medical School, Institute of Biomedical & Clinical Science, RILD Building, Royal Devon & Exeter Hospital, Barrack Road, Exeter, EX2 5DW, UK
| | - Richard A Oram
- University of Exeter Medical School, Institute of Biomedical & Clinical Science, RILD Building, Royal Devon & Exeter Hospital, Barrack Road, Exeter, EX2 5DW, UK.,Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics, University of Exeter, North Park Road, Exeter, EX4 4QF, UK.,Living Systems Institute, EPSRC Hub for Quantitative Modelling in Healthcare, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK
| | - Nicholas J Thomas
- Department of Mathematics, University of Exeter, North Park Road, Exeter, EX4 4QF, UK. .,Living Systems Institute, Centre for Biomedical Modelling and Analysis, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK. .,Royal Devon & Exeter NHS Foundation Trust, Exeter, UK.
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6
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Wedgwood KCA, Słowiński P, Manson J, Tsaneva-Atanasova K, Krauskopf B. Robust spike timing in an excitable cell with delayed feedback. J R Soc Interface 2021; 18:20210029. [PMID: 33849329 DOI: 10.1098/rsif.2021.0029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The initiation and regeneration of pulsatile activity is a ubiquitous feature observed in excitable systems with delayed feedback. Here, we demonstrate this phenomenon in a real biological cell. We establish a critical role of the delay resulting from the finite propagation speed of electrical impulses in the emergence of persistent multiple-spike patterns. We predict the coexistence of a number of such patterns in a mathematical model and use a biological cell subject to dynamic clamp to confirm our predictions in a living mammalian system. Given the general nature of our mathematical model and experimental system, we believe that our results capture key hallmarks of physiological excitability that are fundamental to information processing.
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Affiliation(s)
- Kyle C A Wedgwood
- Living Systems Institute and Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK
| | - Piotr Słowiński
- Living Systems Institute and Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK
| | - James Manson
- Living Systems Institute and Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK
| | - Krasimira Tsaneva-Atanasova
- Living Systems Institute and Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK.,Institute for Advanced Study, Technical University of Munich, Lichtenbergstrasse 2 a, 85748 Garching, Germany.,Department of Bioinformatics and Mathematical Modelling, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 105 Acad. G. Bonchev Str., 1113 Sofia, Bulgaria
| | - Bernd Krauskopf
- Department of Mathematics, University of Auckland, Auckland 1010, New Zealand.,Dodd-Walls Centre for Photonic and Quantum Technologies, Dunedin 9054, New Zealand
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7
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Liu H, Prashant NM, Spurr LF, Bousounis P, Alomran N, Ibeawuchi H, Sein J, Słowiński P, Tsaneva-Atanasova K, Horvath A. scReQTL: an approach to correlate SNVs to gene expression from individual scRNA-seq datasets. BMC Genomics 2021; 22:40. [PMID: 33419390 PMCID: PMC7791999 DOI: 10.1186/s12864-020-07334-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 12/16/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Recently, pioneering expression quantitative trait loci (eQTL) studies on single cell RNA sequencing (scRNA-seq) data have revealed new and cell-specific regulatory single nucleotide variants (SNVs). Here, we present an alternative QTL-related approach applicable to transcribed SNV loci from scRNA-seq data: scReQTL. ScReQTL uses Variant Allele Fraction (VAFRNA) at expressed biallelic loci, and corelates it to gene expression from the corresponding cell. RESULTS Our approach employs the advantage that, when estimated from multiple cells, VAFRNA can be used to assess effects of SNVs in a single sample or individual. In this setting scReQTL operates in the context of identical genotypes, where it is likely to capture RNA-mediated genetic interactions with cell-specific and transient effects. Applying scReQTL on scRNA-seq data generated on the 10 × Genomics Chromium platform using 26,640 mesenchymal cells derived from adipose tissue obtained from three healthy female donors, we identified 1272 unique scReQTLs. ScReQTLs common between individuals or cell types were consistent in terms of the directionality of the relationship and the effect size. Comparative assessment with eQTLs from bulk sequencing data showed that scReQTL analysis identifies a distinct set of SNV-gene correlations, that are substantially enriched in known gene-gene interactions and significant genome-wide association studies (GWAS) loci. CONCLUSION ScReQTL is relevant to the rapidly growing source of scRNA-seq data and can be applied to outline SNVs potentially contributing to cell type-specific and/or dynamic genetic interactions from an individual scRNA-seq dataset. AVAILABILITY https://github.com/HorvathLab/NGS/tree/master/scReQTL.
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Affiliation(s)
- Hongyu Liu
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, 20037, USA
- Chinese Medicine Toxicological Laboratory, Institute of Traditional Chinese Medicine, Heilongjiang University of Chinese Medicine, Harbin, 150040, People's Republic of China
| | - N M Prashant
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, 20037, USA
| | - Liam F Spurr
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, 02215, USA
- Cancer Program, The Broad Institute of MIT and Harvard, Cambridge, MA, 02142, USA
- Pritzker School of Medicine, Biological Sciences Division, The University of Chicago, Chicago, IL, 60637, USA
| | - Pavlos Bousounis
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, 20037, USA
| | - Nawaf Alomran
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, 20037, USA
| | - Helen Ibeawuchi
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, 20037, USA
| | - Justin Sein
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, 20037, USA
| | - Piotr Słowiński
- Translational Research Exchange at Exeter, University of Exeter, Exeter, EX4 4QJ, UK
- EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, EX4 4QJ, UK
| | - Krasimira Tsaneva-Atanasova
- Translational Research Exchange at Exeter, University of Exeter, Exeter, EX4 4QJ, UK
- EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, EX4 4QJ, UK
- Department of Mathematics & Living Systems Institute, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK
- Dept. of Bioinformatics and Mathematical Modelling, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 105 Acad. G. Bonchev Str, 1113, Sofia, Bulgaria
| | - Anelia Horvath
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, 20037, USA.
- Department of Biochemistry and Molecular Medicine, Department of Biostatistics and Bioinformatics School of Medicine and Health Sciences, George Washington University, Washington, DC, 20037, USA.
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8
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Spurr LF, Alomran N, Bousounis P, Reece-Stremtan D, Prashant NM, Liu H, Słowiński P, Li M, Zhang Q, Sein J, Asher G, Crandall KA, Tsaneva-Atanasova K, Horvath A. ReQTL: identifying correlations between expressed SNVs and gene expression using RNA-sequencing data. Bioinformatics 2020; 36:1351-1359. [PMID: 31589315 PMCID: PMC7058180 DOI: 10.1093/bioinformatics/btz750] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 09/19/2019] [Accepted: 10/01/2019] [Indexed: 12/31/2022] Open
Abstract
MOTIVATION By testing for associations between DNA genotypes and gene expression levels, expression quantitative trait locus (eQTL) analyses have been instrumental in understanding how thousands of single nucleotide variants (SNVs) may affect gene expression. As compared to DNA genotypes, RNA genetic variation represents a phenotypic trait that reflects the actual allele content of the studied system. RNA genetic variation at expressed SNV loci can be estimated using the proportion of alleles bearing the variant nucleotide (variant allele fraction, VAFRNA). VAFRNA is a continuous measure which allows for precise allele quantitation in loci where the RNA alleles do not scale with the genotype count. We describe a method to correlate VAFRNA with gene expression and assess its ability to identify genetically regulated expression solely from RNA-sequencing (RNA-seq) datasets. RESULTS We introduce ReQTL, an eQTL modification which substitutes the DNA allele count for the variant allele fraction at expressed SNV loci in the transcriptome (VAFRNA). We exemplify the method on sets of RNA-seq data from human tissues obtained though the Genotype-Tissue Expression (GTEx) project and demonstrate that ReQTL analyses are computationally feasible and can identify a subset of expressed eQTL loci. AVAILABILITY AND IMPLEMENTATION A toolkit to perform ReQTL analyses is available at https://github.com/HorvathLab/ReQTL. SUPPLEMENTARY INFORMATION Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Liam F Spurr
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA.,Cancer Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.,Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Nawaf Alomran
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Pavlos Bousounis
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Dacian Reece-Stremtan
- Computer Applications Support Services, School of Medicine and Health Sciences, The George Washington University, Washington, DC 20037, USA
| | - N M Prashant
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Hongyu Liu
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Piotr Słowiński
- Department of Mathematics & Living Systems Institute, University of Exeter, Exeter EX4 4QD, UK
| | - Muzi Li
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Qianqian Zhang
- Department of Biochemistry and Molecular Medicine.,Department of Biostatistics and Bioinformatics, School of Medicine and Health Sciences, George Washington University, Washington, DC 20037, USA
| | - Justin Sein
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Gabriel Asher
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center
| | - Keith A Crandall
- Computational Biology Institute, Department of Biostatistics and Bioinformatics, Milken Institute School of Public Health, The George Washington University, Washington, DC 20052, USA
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics & Living Systems Institute, University of Exeter, Exeter EX4 4QD, UK.,EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter EX4 4QJ, UK
| | - Anelia Horvath
- Biochemistry and Molecular Medicine, McCormick Genomics and Proteomics Center.,Department of Biochemistry and Molecular Medicine.,Department of Pharmacology and Physiology, School of Medicine and Health Sciences, The George Washington University, Washington, DC 20037, USA
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9
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Słowiński P, Li M, Restrepo P, Alomran N, Spurr LF, Miller C, Tsaneva-Atanasova K, Horvath A. GeTallele: A Method for Analysis of DNA and RNA Allele Frequency Distributions. Front Bioeng Biotechnol 2020; 8:1021. [PMID: 33042959 PMCID: PMC7525018 DOI: 10.3389/fbioe.2020.01021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/04/2020] [Indexed: 12/12/2022] Open
Abstract
Variant allele frequencies (VAF) are an important measure of genetic variation that can be estimated at single-nucleotide variant (SNV) sites. RNA and DNA VAFs are used as indicators of a wide-range of biological traits, including tumor purity and ploidy changes, allele-specific expression and gene-dosage transcriptional response. Here we present a novel methodology to assess gene and chromosomal allele asymmetries and to aid in identifying genomic alterations in RNA and DNA datasets. Our approach is based on analysis of the VAF distributions in chromosomal segments (continuous multi-SNV genomic regions). In each segment we estimate variant probability, a parameter of a random process that can generate synthetic VAF samples that closely resemble the observed data. We show that variant probability is a biologically interpretable quantitative descriptor of the VAF distribution in chromosomal segments which is consistent with other approaches. To this end, we apply the proposed methodology on data from 72 samples obtained from patients with breast invasive carcinoma (BRCA) from The Cancer Genome Atlas (TCGA). We compare DNA and RNA VAF distributions from matched RNA and whole exome sequencing (WES) datasets and find that both genomic signals give very similar segmentation and estimated variant probability profiles. We also find a correlation between variant probability with copy number alterations (CNA). Finally, to demonstrate a practical application of variant probabilities, we use them to estimate tumor purity. Tumor purity estimates based on variant probabilities demonstrate good concordance with other approaches (Pearson's correlation between 0.44 and 0.76). Our evaluation suggests that variant probabilities can serve as a dependable descriptor of VAF distribution, further enabling the statistical comparison of matched DNA and RNA datasets. Finally, they provide conceptual and mechanistic insights into relations between structure of VAF distributions and genetic events. The methodology is implemented in a Matlab toolbox that provides a suite of functions for analysis, statistical assessment and visualization of Genome and Transcriptome allele frequencies distributions. GeTallele is available at: https://github.com/SlowinskiPiotr/GeTallele.
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Affiliation(s)
- Piotr Słowiński
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, Living Systems Institute, Translational Research Exchange @ Exeter and The Engineering and Physical Sciences Research Council Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, United Kingdom
| | - Muzi Li
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States
| | - Paula Restrepo
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States.,Department of Genetics and Genomics Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Nawaf Alomran
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States
| | - Liam F Spurr
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States.,Cancer Program, Broad Institute of MIT and Harvard, Cambridge, MA, United States.,Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, United States.,Biological Sciences Division, Pritzker School of Medicine, The University of Chicago, Chicago, IL, United States
| | - Christian Miller
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, Living Systems Institute, Translational Research Exchange @ Exeter and The Engineering and Physical Sciences Research Council Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, United Kingdom.,Department of Bioinformatics and Mathematical Modelling, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Anelia Horvath
- McCormick Genomics and Proteomics Center, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States.,Department of Pharmacology and Physiology, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States.,Department of Biochemistry and Molecular Medicine, School of Medicine and Health Sciences, The George Washington University, Washington, DC, United States
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10
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Coste A, Bardy BG, Janaqi S, Słowiński P, Tsaneva-Atanasova K, Goupil JL, Marin L. Correction to: Decoding identity from motion: how motor similarities colour our perception of self and others. Psychol Res 2020; 85:520. [PMID: 32495130 DOI: 10.1007/s00426-020-01361-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Alexandre Coste
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France.
| | - Benoît G Bardy
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
| | - Stefan Janaqi
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
| | - Piotr Słowiński
- Department of Mathematics and Living Systems Institute, Translational Research Exchange @ Exeter, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF, UK
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics and Living Systems Institute, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF, UK
- EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, EX4 4QJ, UK
| | - Juliette Lozano Goupil
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
| | - Ludovic Marin
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
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11
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Coste A, Bardy BG, Janaqi S, Słowiński P, Tsaneva-Atanasova K, Goupil JL, Marin L. Decoding identity from motion: how motor similarities colour our perception of self and others. Psychol Res 2020; 85:509-519. [PMID: 32030518 PMCID: PMC7900038 DOI: 10.1007/s00426-020-01290-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 01/14/2020] [Indexed: 01/05/2023]
Abstract
For more than 4 decades, it has been shown that humans are particularly sensitive to biological motion and extract socially relevant information from it such as gender, intentions, emotions or a person’s identity. A growing number of findings, however, indicate that identity perception is not always highly accurate, especially due to large inter-individual differences and a fuzzy self-recognition advantage compared to the recognition of others. Here, we investigated the self-other identification performance and sought to relate this performance to the metric properties of perceptual/physical representations of individual motor signatures. We show that identity perception ability varies substantially across individuals and is associated to the perceptual/physical motor similarities between self and other stimuli. Specifically, we found that the perceptual representations of postural signatures are veridical in the sense that closely reflects the physical postural trajectories and those similarities between people’ actions elicit numerous misattributions. While, on average, people can well recognize their self-generated actions, they more frequently attribute to themselves the actions of those acting in a similar way. These findings are consistent with the common coding theory and support that perception and action are tightly linked and may modulate each other by virtue of similarity.
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Affiliation(s)
- Alexandre Coste
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France.
| | - Benoît G Bardy
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
| | - Stefan Janaqi
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
| | - Piotr Słowiński
- Department of Mathematics and Living Systems Institute, Translational Research Exchange @ Exeter, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF, UK
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics and Living Systems Institute, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF, UK.,EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, EX4 4QJ, UK
| | - Juliette Lozano Goupil
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
| | - Ludovic Marin
- EuroMov Digital Health in Motion, Univ. Montpellier, IMT Mines Alès, Montpellier, France
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12
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Słowiński P, Al-Ramadhani S, Tsaneva-Atanasova K. Neurologically Motivated Coupling Functions in Models of Motor Coordination. SIAM J Appl Dyn Syst 2020; 19:208-232. [PMID: 31992962 PMCID: PMC6986925 DOI: 10.1137/19m1279381] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present an analysis of two Haken-Kelso-Bunz (HKB) oscillators coupled by a neurologically motivated function. We study the effect of time delay and weighted self-feedback and mutual feedback on the synchronization behavior of the model. We focus on identifying parameter regimes supporting experimentally observed decrease in oscillation amplitude and loss of anti-phase stability that has inspired the development of the HKB model. We show that a combination of cross-talk and nonlinearity in the coupling, along with physiologically relevant time delay, is able to quantitatively account for both drop in oscillation amplitude and loss of anti-phase stability in a frequency dependent manner. Furthermore, we demonstrate that the transition between discrete and rhythmic movements could be captured by this model. To this end, we carry out theoretical and numerical analysis of the emergence of in-phase and anti-phase oscillations.
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Affiliation(s)
- Piotr Słowiński
- Department of Mathematics and the Living Systems Institute, Translational Research Exchange @Exeter, University of Exeter, Exeter EX4 4QD, UK (http://emps.exeter.ac.uk/mathematics/staff/pms210)
| | - Sohaib Al-Ramadhani
- Department of Mathematics, College of Education for Pure Science, University of Mosul, Mosul, 41002, Iraq
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics and the Living Systems Institute, EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter EX4 4QD, UK (http://emps.exeter.ac.uk/mathematics/staff/kt298)
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13
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Słowiński P, Baldemir H, Wood G, Alizadehkhaiyat O, Coyles G, Vine S, Williams G, Tsaneva-Atanasova K, Wilson M. Gaze training supports self-organization of movement coordination in children with developmental coordination disorder. Sci Rep 2019; 9:1712. [PMID: 30737438 PMCID: PMC6368583 DOI: 10.1038/s41598-018-38204-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 07/16/2018] [Accepted: 12/20/2018] [Indexed: 12/13/2022] Open
Abstract
Children with developmental coordination disorder (DCD) struggle with the acquisition of coordinated motor skills. This paper adopts a dynamical systems perspective to assess how individual coordination solutions might emerge following an intervention that trained accurate gaze control in a throw and catch task. Kinematic data were collected from six upper body sensors from twenty-one children with DCD, using a 3D motion analysis system, before and after a 4-week training intervention. Covariance matrices between kinematic measures were computed and distances between pairs of covariance matrices calculated using Riemannian geometry. Multidimensional scaling was then used to analyse differences between coordination patterns. The gaze trained group revealed significantly higher total coordination (sum of all the pairwise covariances) following training than a technique-trained control group. While the increase in total coordination also significantly predicted improvement in task performance, the distinct post-intervention coordination patterns for the gaze trained group were not consistent. Additionally, the gaze trained group revealed individual coordination patterns for successful catch attempts that were different from all the coordination patterns before training, whereas the control group did not. Taken together, the results of this interdisciplinary study illustrate how gaze training may encourage the emergence of coordination via self-organization in children with DCD.
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Affiliation(s)
- Piotr Słowiński
- College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QJ, UK
- Living Systems Institute, University of Exeter, Exeter, EX4 4QJ, UK
- Translational Research Exchange @ Exeter, University of Exeter, Exeter, EX4 4QJ, UK
| | - Harun Baldemir
- College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QJ, UK
- Living Systems Institute, University of Exeter, Exeter, EX4 4QJ, UK
| | - Greg Wood
- Department of Sport and Exercise Sciences, Manchester Metropolitan University, Manchester, M1 5GD, UK
- School of Health Sciences, Liverpool Hope University, Liverpool, L16 9JD, UK
| | | | - Ginny Coyles
- School of Health Sciences, Liverpool Hope University, Liverpool, L16 9JD, UK
| | - Samuel Vine
- College of Life and Environmental Sciences, University of Exeter, Exeter, EX1 2LU, UK
| | - Genevieve Williams
- College of Life and Environmental Sciences, University of Exeter, Exeter, EX1 2LU, UK
| | - Krasimira Tsaneva-Atanasova
- College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter, EX4 4QJ, UK
- Living Systems Institute, University of Exeter, Exeter, EX4 4QJ, UK
- EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, EX4 4QJ, UK
| | - Mark Wilson
- College of Life and Environmental Sciences, University of Exeter, Exeter, EX1 2LU, UK.
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14
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Cohen L, Khoramshahi M, Salesse RN, Bortolon C, Słowiński P, Zhai C, Tsaneva-Atanasova K, Di Bernardo M, Capdevielle D, Marin L, Schmidt RC, Bardy BG, Billard A, Raffard S. Influence of facial feedback during a cooperative human-robot task in schizophrenia. Sci Rep 2017; 7:15023. [PMID: 29101325 PMCID: PMC5670132 DOI: 10.1038/s41598-017-14773-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 10/05/2017] [Indexed: 01/28/2023] Open
Abstract
Rapid progress in the area of humanoid robots offers tremendous possibilities for investigating and improving social competences in people with social deficits, but remains yet unexplored in schizophrenia. In this study, we examined the influence of social feedbacks elicited by a humanoid robot on motor coordination during a human-robot interaction. Twenty-two schizophrenia patients and twenty-two matched healthy controls underwent a collaborative motor synchrony task with the iCub humanoid robot. Results revealed that positive social feedback had a facilitatory effect on motor coordination in the control participants compared to non-social positive feedback. This facilitatory effect was not present in schizophrenia patients, whose social-motor coordination was similarly impaired in social and non-social feedback conditions. Furthermore, patients' cognitive flexibility impairment and antipsychotic dosing were negatively correlated with patients' ability to synchronize hand movements with iCub. Overall, our findings reveal that patients have marked difficulties to exploit facial social cues elicited by a humanoid robot to modulate their motor coordination during human-robot interaction, partly accounted for by cognitive deficits and medication. This study opens new perspectives for comprehension of social deficits in this mental disorder.
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Affiliation(s)
- Laura Cohen
- Learning Algorithms and Systems Laboratory, School of Engineering, EPFL, Lausanne, Switzerland
| | - Mahdi Khoramshahi
- Learning Algorithms and Systems Laboratory, School of Engineering, EPFL, Lausanne, Switzerland
| | | | - Catherine Bortolon
- University Department of Adult Psychiatry, CHU, Montpellier, France
- Laboratory Epsylon, EA 4556, University Montpellier 3 Paul Valery, Montpellier, France
| | - Piotr Słowiński
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom
| | - Chao Zhai
- Department of Engineering Mathematics, University of Bristol, Bristol, United Kingdom
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom
| | - Mario Di Bernardo
- Department of Engineering Mathematics, University of Bristol, Bristol, United Kingdom
| | | | - Ludovic Marin
- EuroMov, Montpellier University, Montpellier, France
| | - Richard C Schmidt
- Psychology Department, College of the Holy Cross, Worcester, MA, USA
| | - Benoit G Bardy
- EuroMov, Montpellier University, Montpellier, France
- Institut Universitaire de France, Paris, France
| | - Aude Billard
- Learning Algorithms and Systems Laboratory, School of Engineering, EPFL, Lausanne, Switzerland
| | - Stéphane Raffard
- University Department of Adult Psychiatry, CHU, Montpellier, France.
- Laboratory Epsylon, EA 4556, University Montpellier 3 Paul Valery, Montpellier, France.
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15
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Słowiński P, Alderisio F, Zhai C, Shen Y, Tino P, Bortolon C, Capdevielle D, Cohen L, Khoramshahi M, Billard A, Salesse R, Gueugnon M, Marin L, Bardy BG, di Bernardo M, Raffard S, Tsaneva-Atanasova K. Unravelling socio-motor biomarkers in schizophrenia. NPJ Schizophr 2017; 3:8. [PMID: 28560254 PMCID: PMC5441525 DOI: 10.1038/s41537-016-0009-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 12/06/2016] [Accepted: 12/15/2016] [Indexed: 12/24/2022]
Abstract
We present novel, low-cost and non-invasive potential diagnostic biomarkers of schizophrenia. They are based on the 'mirror-game', a coordination task in which two partners are asked to mimic each other's hand movements. In particular, we use the patient's solo movement, recorded in the absence of a partner, and motion recorded during interaction with an artificial agent, a computer avatar or a humanoid robot. In order to discriminate between the patients and controls, we employ statistical learning techniques, which we apply to nonverbal synchrony and neuromotor features derived from the participants' movement data. The proposed classifier has 93% accuracy and 100% specificity. Our results provide evidence that statistical learning techniques, nonverbal movement coordination and neuromotor characteristics could form the foundation of decision support tools aiding clinicians in cases of diagnostic uncertainty.
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Affiliation(s)
- Piotr Słowiński
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF UK
| | - Francesco Alderisio
- Department of Engineering Mathematics, University of Bristol, Merchant Venturers’ Building, Exeter, BS8 1UB UK
| | - Chao Zhai
- Department of Engineering Mathematics, University of Bristol, Merchant Venturers’ Building, Exeter, BS8 1UB UK
| | - Yuan Shen
- School of Computer Science, University of Birmingham, Edgbaston, Birmingham, B15 2TT UK
| | - Peter Tino
- School of Computer Science, University of Birmingham, Edgbaston, Birmingham, B15 2TT UK
| | - Catherine Bortolon
- University Department of Adult Psychiatry, Hôpital de la Colombière, CHU Montpellier, Montpellier-1 University, Montpellier, France
| | - Delphine Capdevielle
- University Department of Adult Psychiatry, Hôpital de la Colombière, CHU Montpellier, Montpellier-1 University, Montpellier, France
- INSERM U-1061, Montpellier, France
| | - Laura Cohen
- LASA Laboratory, School of Engineering, Ecole Polytechnique Federale de Lausanne—EPFL, Station 9, Lausanne, 1015 Switzerland
| | - Mahdi Khoramshahi
- LASA Laboratory, School of Engineering, Ecole Polytechnique Federale de Lausanne—EPFL, Station 9, Lausanne, 1015 Switzerland
| | - Aude Billard
- LASA Laboratory, School of Engineering, Ecole Polytechnique Federale de Lausanne—EPFL, Station 9, Lausanne, 1015 Switzerland
| | - Robin Salesse
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, Montpellier, 34090 France
| | - Mathieu Gueugnon
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, Montpellier, 34090 France
| | - Ludovic Marin
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, Montpellier, 34090 France
| | - Benoit G. Bardy
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, Montpellier, 34090 France
- Institut Universitaire de France, Paris, France
| | - Mario di Bernardo
- Department of Engineering Mathematics, University of Bristol, Merchant Venturers’ Building, Exeter, BS8 1UB UK
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, Naples, 80125 Italy
| | - Stephane Raffard
- University Department of Adult Psychiatry, Hôpital de la Colombière, CHU Montpellier, Montpellier-1 University, Montpellier, France
- Epsylon Laboratory Dynamic of Human Abilities & Health Behaviors, Montpellier-3 University, Montpellier, France
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF UK
- EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, EX4 4QJ UK
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16
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Słowiński P, Zhai C, Alderisio F, Salesse R, Gueugnon M, Marin L, Bardy BG, di Bernardo M, Tsaneva-Atanasova K. Dynamic similarity promotes interpersonal coordination in joint action. J R Soc Interface 2016; 13:rsif.2015.1093. [PMID: 27009178 PMCID: PMC4843673 DOI: 10.1098/rsif.2015.1093] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 02/23/2016] [Indexed: 11/12/2022] Open
Abstract
Human movement has been studied for decades, and dynamic laws of motion that are common to all humans have been derived. Yet, every individual moves differently from everyone else (faster/slower, harder/smoother, etc.). We propose here an index of such variability, namely an individual motor signature (IMS) able to capture the subtle differences in the way each of us moves. We show that the IMS of a person is time-invariant and that it significantly differs from those of other individuals. This allows us to quantify the dynamic similarity, a measure of rapport between dynamics of different individuals' movements, and demonstrate that it facilitates coordination during interaction. We use our measure to confirm a key prediction of the theory of similarity that coordination between two individuals performing a joint-action task is higher if their motions share similar dynamic features. Furthermore, we use a virtual avatar driven by an interactive cognitive architecture based on feedback control theory to explore the effects of different kinematic features of the avatar motion on coordination with human players.
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Affiliation(s)
- Piotr Słowiński
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
| | - Chao Zhai
- Department of Engineering Mathematics, University of Bristol, Merchant Venturers' Building, Bristol BS8 1UB, UK
| | - Francesco Alderisio
- Department of Engineering Mathematics, University of Bristol, Merchant Venturers' Building, Bristol BS8 1UB, UK
| | - Robin Salesse
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, 34090 Montpellier, France
| | - Mathieu Gueugnon
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, 34090 Montpellier, France
| | - Ludovic Marin
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, 34090 Montpellier, France
| | - Benoit G Bardy
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, 34090 Montpellier, France Institut Universitaire de France, Paris, France
| | - Mario di Bernardo
- Department of Engineering Mathematics, University of Bristol, Merchant Venturers' Building, Bristol BS8 1UB, UK Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK
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17
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Avitabile D, Słowiński P, Bardy B, Tsaneva-Atanasova K. Beyond in-phase and anti-phase coordination in a model of joint action. Biol Cybern 2016; 110:201-216. [PMID: 27278609 PMCID: PMC4903117 DOI: 10.1007/s00422-016-0691-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 05/27/2016] [Indexed: 05/30/2023]
Abstract
In 1985, Haken, Kelso and Bunz proposed a system of coupled nonlinear oscillators as a model of rhythmic movement patterns in human bimanual coordination. Since then, the Haken-Kelso-Bunz (HKB) model has become a modelling paradigm applied extensively in all areas of movement science, including interpersonal motor coordination. However, all previous studies have followed a line of analysis based on slowly varying amplitudes and rotating wave approximations. These approximations lead to a reduced system, consisting of a single differential equation representing the evolution of the relative phase of the two coupled oscillators: the HKB model of the relative phase. Here we take a different approach and systematically investigate the behaviour of the HKB model in the full four-dimensional state space and for general coupling strengths. We perform detailed numerical bifurcation analyses and reveal that the HKB model supports previously unreported dynamical regimes as well as bistability between a variety of coordination patterns. Furthermore, we identify the stability boundaries of distinct coordination regimes in the model and discuss the applicability of our findings to interpersonal coordination and other joint action tasks.
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Affiliation(s)
- Daniele Avitabile
- Centre for Mathematical Medicine and Biology, School of Mathematical Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Piotr Słowiński
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, Devon, EX4 4QF, UK
| | - Benoit Bardy
- EuroMov, Montpellier University, 700 Avenue du Pic Saint-Loup, 34090, Montpellier, France
- Institut Universitaire de France, Paris, France
| | - Krasimira Tsaneva-Atanasova
- Department of Mathematics, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, Devon, EX4 4QF, UK.
- EPSRC Centre for Predictive Modelling in Healthcare, University of Exeter, Exeter, Devon, EX4 4QF, UK.
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18
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Zhai C, Alderisio F, Słowiński P, Tsaneva-Atanasova K, di Bernardo M. Design of a Virtual Player for Joint Improvisation with Humans in the Mirror Game. PLoS One 2016; 11:e0154361. [PMID: 27123927 PMCID: PMC4849738 DOI: 10.1371/journal.pone.0154361] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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: 01/20/2016] [Accepted: 04/12/2016] [Indexed: 11/18/2022] Open
Abstract
Joint improvisation is often observed among humans performing joint action tasks. Exploring the underlying cognitive and neural mechanisms behind the emergence of joint improvisation is an open research challenge. This paper investigates jointly improvised movements between two participants in the mirror game, a paradigmatic joint task example. First, experiments involving movement coordination of different dyads of human players are performed in order to build a human benchmark. No designation of leader and follower is given beforehand. We find that joint improvisation is characterized by the lack of a leader and high levels of movement synchronization. Then, a theoretical model is proposed to capture some features of their interaction, and a set of experiments is carried out to test and validate the model ability to reproduce the experimental observations. Furthermore, the model is used to drive a computer avatar able to successfully improvise joint motion with a human participant in real time. Finally, a convergence analysis of the proposed model is carried out to confirm its ability to reproduce joint movements between the participants.
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Affiliation(s)
- Chao Zhai
- Department of Engineering Mathematics, University of Bristol, BS8 1UB Bristol, United Kingdom
| | - Francesco Alderisio
- Department of Engineering Mathematics, University of Bristol, BS8 1UB Bristol, United Kingdom
| | - Piotr Słowiński
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, EX4 4QF Exeter, United Kingdom
| | - Krasimira Tsaneva-Atanasova
- College of Engineering, Mathematics and Physical Sciences, University of Exeter, EX4 4QF Exeter, United Kingdom
| | - Mario di Bernardo
- Department of Engineering Mathematics, University of Bristol, BS8 1UB Bristol, United Kingdom
- Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
- * E-mail:
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19
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Karyński M, Słowiński P, Grzesiowski P, Fiett J, Podsiadły E, Walory J, Tylewska-Wierzbanowska S, Staszkiewicz W, Hryniewicz W. [Chlamydia pneumoniae infection in patients with advanced carotid atherosclerosis]. Pol Merkur Lekarski 2004; 17:365-7. [PMID: 15690703] [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] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Despite the growing number of scientific reports showing different markers of infection caused by Chlamydia pneumoniae in patients with advanced atherosclerosis, there is still no clear confirmation of a pathogenetic link between this infection and atherogenesis. The aim of the present study was to investigate the presence C. pneumoniae DNA in peripheral blood mononuclear cells and carotid endarterectomy samples obtained from patients with advanced atherosclerosis according to the presence specific antibodies against C. pneumoniae in serum. The levels of IgG, IgM and IgA antibodies to C. pneumoniae were determined by enzyme immunoassay (EIA) in sera of 36 patients with advanced atherosclerosis undergoing carotid endarterectomy. The presence of C. pneumoniae DNA in the carotid samples and in peripheral blood mononuclear cells was investigated by a nested polymerase chain reaction (PCR). We have not confirm the presence of C. pneumoniae DNA either in the carotid endarterectomy samples or in peripheral blood mononuclear cells, both in patients having the specific antibodies against C. pneumoniae and in seronegative patients. In the studied group of patients with advanced carotid atherosclerosis there was no correlation between the presence of specific antibodies against C. pneumoniae and the presence of C. pneumoniae DNA in endarterectomy samples and peripheral blood mononuclear cells.
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