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Andeweg SM, Bodrij FF, Prevoo MJL, Rippe RCA, Alink LRA. Household chaos and parenting: The effect of household chaos does not depend on sensory-processing sensitivity and self-regulation. Infant Ment Health J 2024; 45:165-184. [PMID: 38329393 DOI: 10.1002/imhj.22105] [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: 01/11/2022] [Revised: 11/24/2023] [Accepted: 01/07/2024] [Indexed: 02/09/2024]
Abstract
Previous studies have found evidence for a causal effect of household chaos on parenting and suggest that this effect may be stronger for parents with higher sensory-processing sensitivity (SPS) or lower self-regulation. This study investigates whether primary caregivers of children around age 1.5-2 years show greater improvement in parenting after a decrease in household chaos if parents have higher SPS or lower self-regulation. The study employs a randomized controlled trial (RCT) design with an intervention aimed at reducing household chaos. A total of 125 parents of toddlers participated in the study. All participants were living in the Netherlands at the time of the study, 89% identified with the Dutch ethnicity and 11% with a non-Dutch ethnicity. Self-report as well as objective measures were used, including videotaped parent-child interactions and home observations. The effect of the intervention on parenting did not depend on SPS or self-regulation. When studying the relation between change in measures of household chaos and posttest parenting, decreased self-reported household chaos was related to less harsh discipline in parents with higher self-regulation, and to more harsh discipline in parents with lower self-regulation. However, this is a tentative finding that should be further explored in future research.
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Affiliation(s)
- Suzanne M Andeweg
- Institute of Education and Child Studies, Leiden University, Leiden, The Netherlands
| | - F Fenne Bodrij
- Institute of Education and Child Studies, Leiden University, Leiden, The Netherlands
| | - Mariëlle J L Prevoo
- Institute of Education and Child Studies, Leiden University, Leiden, The Netherlands
| | - Ralph C A Rippe
- Institute of Education and Child Studies, Leiden University, Leiden, The Netherlands
| | - Lenneke R A Alink
- Institute of Education and Child Studies, Leiden University, Leiden, The Netherlands
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2
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Liu L, Li H, Wang X, Chang C. Transcription Factor TaMYB30 Activates Wheat Wax Biosynthesis. Int J Mol Sci 2023; 24:10235. [PMID: 37373378 DOI: 10.3390/ijms241210235] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 06/11/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
The waxy cuticle covers a plant's aerial surface and contributes to environmental adaptation in land plants. Although past decades have seen great advances in understanding wax biosynthesis in model plants, the mechanisms underlying wax biosynthesis in crop plants such as bread wheat remain to be elucidated. In this study, wheat MYB transcription factor TaMYB30 was identified as a transcriptional activator positively regulating wheat wax biosynthesis. The knockdown of TaMYB30 expression using virus-induced gene silencing led to attenuated wax accumulation, increased water loss rates, and enhanced chlorophyll leaching. Furthermore, TaKCS1 and TaECR were isolated as essential components of wax biosynthetic machinery in bread wheat. In addition, silencing TaKCS1 and TaECR resulted in compromised wax biosynthesis and potentiated cuticle permeability. Importantly, we showed that TaMYB30 could directly bind to the promoter regions of TaKCS1 and TaECR genes by recognizing the MBS and Motif 1 cis-elements, and activate their expressions. These results collectively demonstrated that TaMYB30 positively regulates wheat wax biosynthesis presumably via the transcriptional activation of TaKCS1 and TaECR.
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Affiliation(s)
- Lang Liu
- College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Haoyu Li
- College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Xiaoyu Wang
- College of Life Sciences, Qingdao University, Qingdao 266071, China
| | - Cheng Chang
- College of Life Sciences, Qingdao University, Qingdao 266071, China
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3
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Gui Y, Zhang Y, Zhang Q, Chen X, Wang F, Wu F, Gui Y, Li Q. The functional verification and analysis of Fugu promoter of cardiac gene tnni1a in zebrafish. Cells Dev 2022; 171:203801. [PMID: 35787465 DOI: 10.1016/j.cdev.2022.203801] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 05/09/2022] [Accepted: 06/28/2022] [Indexed: 01/25/2023]
Abstract
Troponin I type 1b (Tnni1b) is thought to be a novel isoform that is expressed only in the zebrafish heart. Knocking down of tnni1b can lead to cardiac defects in zebrafish. Although both the zebrafish tnni1b and human troponin I1 (TNNI1) genes are thought to be closely associated with fatal cardiac development, the regulatory molecular mechanisms of these genes are poorly understood. Analyzing the functionally conserved sequence, especially in the noncoding regulatory region involved in gene expression, clarified these mechanisms. In this study, we isolated a 3 kb fragment upstream of Fugu tnni1a that can regulate green fluorescence protein (GFP) expression in a heart-specific manner, similar to the pattern of zebrafish homologue expression. Three evolutionarily conserved regions (ECRs) in the 5'-flanking sequence of Fugu tnni1a were identified by sequence alignment. Deletion analysis led to the identification of ECR2 as a core sequence that affects the heart-specific expression function of the Fugu tnni1a promoter. Interestingly, both the Fugu tnni1a promoter and ECR2 sequence were functionally conserved in zebrafish, although they shared no sequence similarity. Together, the findings of our study provided further evidence for the important role of tnni1a homologous in cardiac development and demonstrated that two functionally conserved sequences in the zebrafish and Fugu genomes may be ECRs, despite their lack of similarity.
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Affiliation(s)
- Yiting Gui
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, NHC Key Laboratory of Neonatal Diseases, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China; Cardiovascular Center, NHC Key Laboratory of Neonatal Diseases, Fudan University, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Yawen Zhang
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, NHC Key Laboratory of Neonatal Diseases, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China; Cardiovascular Center, NHC Key Laboratory of Neonatal Diseases, Fudan University, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Qi Zhang
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, NHC Key Laboratory of Neonatal Diseases, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Xudong Chen
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, NHC Key Laboratory of Neonatal Diseases, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Feng Wang
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, NHC Key Laboratory of Neonatal Diseases, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China; Cardiovascular Center, NHC Key Laboratory of Neonatal Diseases, Fudan University, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China
| | - Fang Wu
- Department of Neonatology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201600, China
| | - Yonghao Gui
- Cardiovascular Center, NHC Key Laboratory of Neonatal Diseases, Fudan University, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China.
| | - Qiang Li
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, NHC Key Laboratory of Neonatal Diseases, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai 201102, China.
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4
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Zhang Z, Tian L. Trends in DTR, CR, ECR, and FQR in Four Common Gram-Negative Bacteria: A Retrospective Study from 2013 to 2021. Infect Drug Resist 2022; 15:2625-2631. [PMID: 35634581 PMCID: PMC9139338 DOI: 10.2147/idr.s365139] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Accepted: 05/19/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose The purpose of this study was to examine the prevalence of four important drug-resistance phenotypes: difficult-to-treat resistance (DTR), fluoroquinolone resistance (FQR), carbapenem resistance (CR), and extended-spectrum cephalosporin resistance (ECR). Methods DTR was defined as insensitivity to all the β-lactams and fluoroquinolones tested. We retrospectively analyzed the distribution characteristics of specific drug-resistant phenotypes of the main Gram-negative bacteria causing bloodstream infections (BSIs) in Tongji Hospital (Wuhan, China) between 2013 and 2021: Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii. Results FQR was the main antimicrobial resistance phenotype of E. coli, accounting for 59.45% (1117/1879, 95% confidence interval, 57.21%-61.65%); the detection rates for CR and DTR were low, accounting for 1.86% (35/1879, 1.34%-2.58%), and 1.81% (34/1879, 1.30%-2.52%), respectively. However, the detection rates for CR and DTR in K. pneumoniae were 38.83% (497/1280, 36.20%-41.53%) and 35.94% (460/1280, 33.35%-38.60%), respectively. In P. aeruginosa, the detection rates of the four drug-resistant phenotypes (DTR, CR, FQR, and ECR) were all < 30%, but conversely, for A. baumannii, the detection rates were all > 80%. The changes in the data from 2013 to 2021 showed upward trends (z > 0) for CR-E. coli, DTR-E. coli, FQR-E. coli, CR-K. pneumoniae, DTR-K. pneumoniae, FQR-K. pneumoniae, and ECR-K. pneumoniae, but downward trends (z < 0) for ECR-E. coli, CR-A. baumannii, DTR-A. baumannii, FQR-A. baumannii, ECR-A. baumannii, CR-P. aeruginosa, DTR-P. aeruginosa, FQR-P. aeruginosa, and ECR-P. aeruginosa. Conclusion DTR warrants further attention, especially in in BSI-associated K. pneumoniae and A. baumannii, in which the detection rates were very high. Between 2013 and 2021 in this region, DTR-E. coli and CR-E. coli showed obvious upward trends, whereas DTR-P. aeruginosa and ECR-P. aeruginosa showed obvious downward trends.
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Affiliation(s)
- Zhen Zhang
- Department of Pharmacy, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People’s Republic of China
| | - Lei Tian
- Department of Clinical Laboratory, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, People’s Republic of China
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Bansal A, Abruzzese GA, Hewawasam E, Hasebe K, Hamada H, Hoodbhoy Z, Diounou H, Ibáñez CA, Miranda RA, Golden TN, Miliku K, Isasi CR. Impact of COVID-19 pandemic on research and careers of early career researchers: a DOHaD perspective. J Dev Orig Health Dis 2022;:1-6. [PMID: 35241213 DOI: 10.1017/S2040174422000071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The COVID-19 pandemic has exposed several inequalities worldwide, including the populations' access to healthcare systems and economic differences that impact the access to vaccination, medical resources, and health care services. Scientific research activities were not an exception, such that scientific research was profoundly impacted globally. Research trainees and early career researchers (ECRs) are the life force of scientific discovery around the world, and their work and progress in research was dramatically affected by the COVID-19 pandemic. ECRs are a particularly vulnerable group as they are in a formative stage of their scientific careers, any disruptions during which is going to likely impact their lifelong career trajectory. To understand how COVID-19 impacted lives, career development plans, and research of Developmental Origins of Health and Disease (DOHaD) ECRs, the International DOHaD ECR committee formed a special interest group comprising of ECR representatives of International DOHaD affiliated Societies/Chapters from around the world (Australia and New Zealand, Canada, French Speaking DOHaD, Japan, Latin America, Pakistan and USA). The anecdotal evidence summarized in this brief report, provide an overview of the findings of this special interest group, specifically on the impact of the evolving COVID-19 pandemic on daily research activities and its effects on career development plans of ECRs. We also discuss how our learnings from these shared experiences can strengthen collaborative work for the current and future generation of scientists.
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6
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Fu B, Ma R, Liu F, Chen X, Teng X, Yang P, Liu J, Zhao D, Sun L. Ginsenosides improve reproductive capability of aged female Drosophila through mechanism dependent on ecdysteroid receptor ( ECR) and steroid signaling pathway. Front Endocrinol (Lausanne) 2022; 13:964069. [PMID: 36017314 PMCID: PMC9396376 DOI: 10.3389/fendo.2022.964069] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
Aging ovaries caused diminished fertility and depleted steroid hormone level. Ginsenosides, the active ingredient in ginseng, had estrogen-like hormonal effects. Although ginsenosides were well known for their ability to alleviate many age-related degenerative diseases, the effect of ginsenosides on the decline in reproductive capability caused by aging, as well as the mechanism, are unknown. We found that ginsenosides improved the quantity and quality of the offspring, prolonged life and restored muscle ability in aged female Drosophila. In addition, ginsenosides inhibited ovarian atrophy and maintained steroid hormone 20-Hydroxyecdysone (20E) and juvenile-preserving hormone (JH)) levels. Ginsenosides activated ecdysteroid receptor (ECR) and increased the expression of the early transcription genes E74 and Broad (Br), which triggered steroid signaling pathway. Meanwhile, ginsenosides promoted JH biosynthesis by increasing the expression of Hydroxyl-methylglutaryl-CoA reductase (HMGR) and juvenile hormone acid O-methyltransferase (JHAMT). Subsequently, JH was bound to Methoprene Tolerant (Met) and activated the transcription of the responsive gene Kruppel Homolog 1 (Kr-h1), which coordinated with 20E signaling to promote the reproduction of aged female Drosophila. The reproductive capacity and steroid hormone levels were not improved and the steroid signaling pathway was not activated in ginsenoside-treated ECR knockout Drosophila. This suggested that ginsenosides played a role dependent on targeted ECR. Furthermore, 17 kinds of ginsenoside monomers were identified from the total ginsenosides. Among them, Rg1, Re and Rb1 improved the reproductive capacity and steroid hormone levels of aged female Drosophila, which has similar effects to the total ginsenoside. These results indicated that ginsenosides could enhance the reproductive capacity of aged female Drosophila by activating steroid signals dependent on nuclear receptor ECR. In addition, ginsenoside monomers Rg1, Rb1 and Re are the main active components of total ginsenosides to improve reproductive ability. This will provide strong evidence that ginsenosides had the potential to alleviate age-induced reproductive degradation.
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Affiliation(s)
- Baoyu Fu
- Research Center of Traditional Chinese Medicine, Affiliated Hospital, Changchun University of Chinese Medicine, Changchun, China
| | - Rui Ma
- Research Center of Traditional Chinese Medicine, Affiliated Hospital, Changchun University of Chinese Medicine, Changchun, China
- *Correspondence: Liwei Sun, ; Rui Ma,
| | - Fangbing Liu
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
| | - Xuenan Chen
- Research Center of Traditional Chinese Medicine, Affiliated Hospital, Changchun University of Chinese Medicine, Changchun, China
| | - Xiaoyu Teng
- College of Science, Beihua University, Jilin, China
| | - Pengdi Yang
- College of Science, Beihua University, Jilin, China
| | - Jianzeng Liu
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
| | - Daqing Zhao
- Jilin Ginseng Academy, Changchun University of Chinese Medicine, Changchun, China
- Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Ministry of Education, Changchun University of Chinese Medicine, Changchun, China
| | - Liwei Sun
- Research Center of Traditional Chinese Medicine, Affiliated Hospital, Changchun University of Chinese Medicine, Changchun, China
- Key Laboratory of Active Substances and Biological Mechanisms of Ginseng Efficacy, Ministry of Education, Changchun University of Chinese Medicine, Changchun, China
- *Correspondence: Liwei Sun, ; Rui Ma,
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7
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Hammam N, Li J, Evans M, Kay JL, Izadi Z, Anastasiou C, Gianfrancesco MA, Yazdany J, Schmajuk G. Epidemiology and treatment of Behçet's disease in the USA: insights from the Rheumatology Informatics System for Effectiveness (RISE) Registry with a comparison with other published cohorts from endemic regions. Arthritis Res Ther 2021; 23:224. [PMID: 34461986 PMCID: PMC8404295 DOI: 10.1186/s13075-021-02615-7] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/23/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Behçet's disease (BD), a chronic systemic vasculitis, has distinct geographical and ethnic variation. Data regarding the epidemiology of patients with BD in the U.S. are limited; therefore, we sought to describe BD patient characteristics and medication use in the U.S., and compared them with data from patients from endemic regions. METHODS We conducted a cross-sectional study using data from the RISE registry (2014-2018). Patients aged ≥ 18 years with BD were included. Sociodemographic and treatment information was extracted. We compared patients from the RISE registry to data from other published studies of patients with BD from endemic areas. RESULTS One thousand three hundred twenty-three subjects with BD from the RISE registry were included. Mean age was 48.7 ± 16.3 years, female to male ratio was 3.8:1, and 66.7% were White. The most frequently used medications included glucocorticoids (67.6%) and colchicine (55.0%). Infliximab and adalimumab were the most used biologics (14.5% and 14.1%, respectively); 3.2% of patients used apremilast. The RISE registry had more women (79.3%), and patients were older compared to previously published BD studies from endemic areas. Methotrexate and TNFi were more commonly reported in RISE (21.8% and 29.4%) compared to studies from Egypt and Turkey. Colchicine, cyclosporine, and cyclophosphamide were more commonly used in cohorts from Egypt, Turkey, and Iran. CONCLUSIONS Findings from the largest BD dataset in the U.S. suggest that BD patients are predominantly female. Further research is needed to explore the reasons for the higher prevalence of BD among women in the U.S. and its possible impact on disease severity and management.
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Affiliation(s)
- Nevin Hammam
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Jing Li
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Michael Evans
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Julia L Kay
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Zara Izadi
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Christine Anastasiou
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Milena A Gianfrancesco
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Jinoos Yazdany
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Gabriela Schmajuk
- Division of Rheumatology, Department of Medicine, University of California San Francisco, San Francisco, CA, USA.
- Philip R. Lee Institute for Health Policy Research, San Francisco, USA.
- San Francisco Veterans Affairs Medical Center, 4150 Clement St 111R, San Francisco, CA, 94121, USA.
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8
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Cunliffe J, Al-Hadidi A, Sawair FA, Mahasneh SA. Comparison of imaging modalities in the diagnosis of external cervical resorption ( ECR): an in-vitro study. Odontology 2021; 110:157-163. [PMID: 34448951 DOI: 10.1007/s10266-021-00651-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/18/2021] [Indexed: 01/25/2023]
Abstract
External cervical resorption is a pathological condition affecting the cervical margins of teeth. Due to the increased prevalence and the area it affects, it can be easily misdiagnosed. The ability of clinicians to diagnose ECR and subcategorise the lesions using periapical radiographs and cone beam-CT scans has not been investigated in-depth. This study aims to assess if diagnostic ability to detect ECR lesions with the two modalities was different and if there was a change in the diagnosis when CBCT was used. A human skull, including the mandible was used for this study. The teeth were randomly allocated to the different subcategories, then pre and post-preparation radiographs with CBCT were taken. Statistical analysis was done using IBM SPSS version 16.0 (SPSS Inc., Chicago, IL, USA). The study sample was composed of 60 participants, the overall sensitivity of intraoral radiographs was significantly lower than CBCT. When the participants were told the radiograph and the CBCT were of the same tooth 60% said they would change their diagnosis. The use of intraoral radiographs alone might not be enough to identify and correctly diagnose ECR lesions. CBCT can give a better idea about the nature and the extent of the lesion.
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Affiliation(s)
- Joanne Cunliffe
- Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester, M13 9PL, UK
| | - Abeer Al-Hadidi
- School of Dentistry, The University of Jordan, Amman, 11942, Jordan
| | - Faleh A Sawair
- School of Dentistry, The University of Jordan, Amman, 11942, Jordan
| | - Sari A Mahasneh
- Division of Dentistry, School of Medical Sciences, The University of Manchester, Manchester, M13 9PL, UK. .,School of Dentistry, The University of Jordan, Amman, 11942, Jordan.
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Abstract
BACKGROUND Static muscular activity of muscles activated in the use of the conventional PC mouse is believed to represent a higher risk for the musculoskeletal health of the user than dynamic muscular activity. OBJECTIVE This paper presents a compounded muscular activity dynamics indicator (akin to percent relative range), enabling comparison between computer handheld pointing devices. METHODS This muscular dynamism approach considers baseline muscular activity (APL, ECR, ECU and ED) relative to the Maximum Voluntary Contraction as well as the dynamics of muscular activation. The latter is computed as the ratio of the difference between APDF90 and APDF10 divided by APDF50 (APDF-Amplitude Probability Distribution Function for the 90th, 50th and 10th percentiles). The paper demonstrates the approach with results of comparative evaluation of a horizontal, a slanted and a vertical PC mouse, through surface EMG monitoring of 20 participants performing standardized graphical task with the devices. RESULTS Hand size impacts muscular activity dynamics in these four muscles, which supersedes differences in device geometry, across the range of devices tested. CONCLUSION Smaller devices relative to hand size foster more dynamic muscular activity.
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Affiliation(s)
- Denis A Coelho
- Department of Supply Chain and Operations Management, School of Engineering, Jönköping University, Jönköping, Sweden
| | - Miguel L Lourenço
- C-MAST: Centre for Mechanical and Aerospace Science and Technologies, Universidade da Beira Interior, Covilhã, Portugal.,Engineering and Technology Technical Scientific Unit & Research Unit for Inland Development, Technology and Management School, Guarda Polytechnic Institute, Guarda, Portugal
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10
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Cuypers WL, Dönertaş HM, Grewal JK, Fatima N, Donnelly C, Mer AS, Krieger S, Cuypers B, Rahman F. Highlights from the 16th International Society for Computational Biology Student Council Symposium 2020. F1000Res 2021; 10. [PMID: 34136128 PMCID: PMC8182693 DOI: 10.12688/f1000research.53408.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/25/2021] [Indexed: 11/20/2022] Open
Abstract
In this meeting overview, we summarise the scientific program and organisation of the 16th International Society for Computational Biology Student Council Symposium in 2020 (ISCB SCS2020). This symposium was the first virtual edition in an uninterrupted series of symposia that has been going on for 15 years, aiming to unite computational biology students and early career researchers across the globe.
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Affiliation(s)
- Wim L Cuypers
- Adrem Data Lab, Department of Computer Science, University of Antwerp, Antwerp, Belgium.,Tropical Bacteriology Unit, Department of Clinical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Handan Melike Dönertaş
- European Molecular Biology Laboratory, European Bioinformatics Institute EMBL-EBI, Wellcome Trust Genome Campus, Cambridge, UK
| | - Jasleen K Grewal
- Canada's Michael Smith Genome Sciences Centre, BC Cancer Research Institute, Vancouver, British Columbia, Canada
| | | | - Chase Donnelly
- Adrem Data Lab, Department of Computer Science, University of Antwerp, Antwerp, Belgium
| | - Arvind Singh Mer
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Spencer Krieger
- Department of Computer Science, University of Arizona, Tucson, Arizona, USA
| | - Bart Cuypers
- Adrem Data Lab, Department of Computer Science, University of Antwerp, Antwerp, Belgium.,Molecular Parasitology Unit, Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium
| | - Farzana Rahman
- School of Human and Life Sciences, Canterbury Christ Church University, Canterbury, UK
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Abstract
Early-career researchers (ECRs) make up a large portion of the academic workforce and their experiences often reflect the wider culture of the research system. Here we surveyed 658 ECRs working in Australia to better understand the needs and challenges faced by this community. Although most respondents indicated a 'love of science', many also expressed an intention to leave their research position. The responses highlight how job insecurity, workplace culture, mentorship and 'questionable research practices' are impacting the job satisfaction of ECRs and potentially compromising science in Australia. We also make recommendations for addressing some of these concerns.
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Affiliation(s)
| | | | - Jo-ann Larkins
- School of Engineering, Information Technology and Physical Sciences, Federation University AustraliaChurchillAustralia
| | - Wendy Wright
- School of Science, Psychology and Sport, Federation University AustraliaChurchillAustralia
| | - Michael R Doran
- School of Biomedical Sciences and Centre for Biomedical Technologies, Queensland University of TechnologyBrisbaneAustralia
- Translational Research InstituteBrisbaneAustralia
- Mater Research InstituteBrisbaneAustralia
- Skeletal Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of HealthBethesdaUnited States
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12
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Liu Q, Song Z, Cai H, Zhou A, Wang W, Jiang L, Liu Y, Zhang Y, Xu N. Effect of Ultrasonic Parameters on Electrochemical Chloride Removal and Rebar Repassivation of Reinforced Concrete. Materials (Basel) 2019; 12:E2774. [PMID: 31470506 DOI: 10.3390/ma12172774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 08/17/2019] [Accepted: 08/28/2019] [Indexed: 12/03/2022]
Abstract
Electrochemical chloride removal (ECR) from reinforced concrete can be considered as an environment-friendly technique since it can reduce the environmental issues arising from demolition and reconstruction. In this study, we used ultrasonic waves to promote the ECR efficiency without increasing the current density so as to shorten the overall power-on time, lowering the power consumption and electricity-induced material damage. Rebar-embedded cement mortar specimens were prepared and a set of ultrasonic-assisted ECR test devices was designed. For obtaining the optimal parameters, different ultrasonic frequencies and powers were adopted to conduct the ECR test. After that, the discharged and residual chloride ion amounts were detected to characterize the ECR efficiency. The corrosion behavior of rebar was characterized by electrochemical method. It was found that ultrasonic waves can not only promote the discharge of chloride ions, but also promote the passivation process of steel bar. For this investigation, the ultrasonic waves with a frequency of 40 Hz and a power of 60 W had the best auxiliary effect and could reduce the work time by 64%. It is considered that the ultrasound-assisted method has potential to promote the application possibilities of the ECR technique.
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Huang S, Maingard J, Kok HK, Barras CD, Thijs V, Chandra RV, Brooks DM, Asadi H. Optimizing Resources for Endovascular Clot Retrieval for Acute Ischemic Stroke, a Discrete Event Simulation. Front Neurol 2019; 10:653. [PMID: 31316449 PMCID: PMC6610480 DOI: 10.3389/fneur.2019.00653] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 06/04/2019] [Indexed: 11/30/2022] Open
Abstract
Objective: Endovascular clot retrieval (ECR) is the standard of care for acute ischemic stroke due to large vessel occlusion. Performing ECR is a time critical and complex process involving many specialized care providers and resources. Maximizing patient benefit while minimizing service cost requires optimization of human and physical assets. The aim of this study is to develop a general computational model of an ECR service, which can be used to optimize resource allocation. Methods: Using a discrete event simulation approach, we examined ECR performance under a range of possible scenarios and resource use configurations. Results: The model demonstrated the impact of competing emergency interventional cases upon ECR treatment times and time impact of allocating more physical (more angiographic suites) or staff resources (extending work hours). Conclusion: Our DES model can be used to optimize resources for interventional treatment of acute ischemic stroke and large vessel occlusion. This proof-of-concept study of computational simulation of resource allocation for ECR can be easily extended. For example, center-specific cost data may be incorporated to optimize resource allocation and overall health care value.
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Affiliation(s)
| | - Julian Maingard
- Interventional Neuroradiology Service, Department of Radiology, Austin Health, Heidelberg, VIC, Australia.,Faculty of Health, School of Medicine, Deakin University, Waurn Ponds, VIC, Australia
| | - Hong Kuan Kok
- Faculty of Health, School of Medicine, Deakin University, Waurn Ponds, VIC, Australia.,Interventional Radiology Service, Department of Radiology, Northern Health, Epping, VIC, Australia
| | - Christen D Barras
- South Australian Health and Medical Research Institute, The University of Adelaide, Adelaide, SA, Australia.,Department of Radiology, Royal Adelaide Hospital, Adelaide, SA, Australia
| | - Vincent Thijs
- Stroke Division, Department of Neurology, Austin Health, Melbourne, VIC, Australia.,Stroke Division, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Ronil V Chandra
- Interventional Neuroradiology, Monash Imaging, Monash Medical Centre, Clayton, VIC, Australia.,Department of Surgery and Department of Medicine, Monash University, Clayton, VIC, Australia
| | - Duncan Mark Brooks
- Interventional Neuroradiology Service, Department of Radiology, Austin Health, Heidelberg, VIC, Australia.,Faculty of Health, School of Medicine, Deakin University, Waurn Ponds, VIC, Australia.,Stroke Division, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia
| | - Hamed Asadi
- Interventional Neuroradiology Service, Department of Radiology, Austin Health, Heidelberg, VIC, Australia.,Faculty of Health, School of Medicine, Deakin University, Waurn Ponds, VIC, Australia.,Stroke Division, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC, Australia.,Interventional Neuroradiology, Monash Imaging, Monash Medical Centre, Clayton, VIC, Australia
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14
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Lang A, Papp B, Gonda X, Dome P, Rihmer Z. Dimensions of adult attachment are significantly associated with specific affective temperament constellations in a Hungarian university sample. J Affect Disord 2016; 191:78-81. [PMID: 26655115 DOI: 10.1016/j.jad.2015.11.026] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 11/11/2015] [Accepted: 11/15/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND Related to emotion regulation and mental health, adult attachment and affective temperaments are relevant research topics of contemporary psychiatry and clinical psychology. However, to date, only one study investigated the relationship between these two constructs. Thus, we aimed to further reveal adult attachment's association with affective temperaments. METHODS Affective temperament and adult attachment dimensions of 1469 Hungarian university students were assessed with self-report measures (Temperament Evaluation of Memphis, Pisa and San Diego autoquestionnaire and Experiences in Close Relationships Scale, respectively). Age and measured variables were compared between genders with ANOVAs. Associations between attachment dimensions and affective temperaments were examined with Pearson's correlations and partial correlations; the moderation effect of age and gender on these relationships was tested with PROCESS macro. Using Fisher r-to-z transformation, we also compared our results with the findings of the previous study. Cohen's ds were used to report effect size and Cronbach's alphas were computed as indices of internal reliability. RESULTS Significant correlations were found between attachment dimensions and affective temperaments. Correlations were especially robust between attachment anxiety and depressive, cyclothymic and anxious temperaments. Contrasted with the results of the previous study, hyperthymic temperament was negatively related to attachment avoidance and anxious temperament was significantly more strongly correlated with attachment anxiety in our study. LIMITATIONS We used a previous version of the adult attachment measure. Our sample differed from the target sample in several ways. Participants were not screened for mental disorders. CONCLUSIONS Findings highlight that adult attachment dimensions are significantly associated with affective temperaments.
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Affiliation(s)
- Andras Lang
- Institute of Psychology, University of Pecs, Ifjusag str. 6., H-7624 Pecs, Hungary.
| | - Barbara Papp
- Doctoral School of Psychology, University of Pecs, Ifjusag str. 6., H-7624 Pecs, Hungary
| | - Xenia Gonda
- Department of Clinical and Theoretical Mental Health, Semmelweis University, Kutvolgyi str. 4., H-1125 Budapest, Hungary; National Institute of Psychiatry and Addictions, Laboratory for Suicide Research and Prevention, Lehel str. 59, H-1135 Budapest, Hungary; MTA-SE Neuropsychopharmacology and Neurochemistry Research Group, Hungarian Academy of Sciences, Nagyvarad sq. 4., H-1089 Budapest, Hungary
| | - Peter Dome
- Department of Clinical and Theoretical Mental Health, Semmelweis University, Kutvolgyi str. 4., H-1125 Budapest, Hungary; National Institute of Psychiatry and Addictions, Laboratory for Suicide Research and Prevention, Lehel str. 59, H-1135 Budapest, Hungary
| | - Zoltan Rihmer
- Department of Clinical and Theoretical Mental Health, Semmelweis University, Kutvolgyi str. 4., H-1125 Budapest, Hungary; National Institute of Psychiatry and Addictions, Laboratory for Suicide Research and Prevention, Lehel str. 59, H-1135 Budapest, Hungary
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15
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Maslovat D, Drummond NM, Carter MJ, Carlsen AN. Startle activation is additive with voluntary cortical activation irrespective of stimulus modality. Neurosci Lett 2015; 606:151-5. [PMID: 26335271 DOI: 10.1016/j.neulet.2015.08.053] [Citation(s) in RCA: 9] [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] [Received: 07/27/2015] [Revised: 08/19/2015] [Accepted: 08/28/2015] [Indexed: 10/23/2022]
Abstract
When a startling acoustic stimulus (SAS) is presented during a simple reaction time (RT) task, it can trigger the prepared response through an involuntary initiation pathway. Previous research modelling the effects of presenting a SAS at various intervals following a non-startling auditory imperative signal (IS) suggested that involuntary initiation-related neural activation is additive with the voluntary initiation processes. The current study tested the predictions of this additive model when the SAS and IS are of different modalities by using a visual rather than auditory go-signal. Because voluntary RT latencies are delayed for visual stimuli compared to acoustic stimuli, it was hypothesised that the time course of additive activation would be similarly delayed. Participants performed 150 RT trials requiring a targeted 20° wrist extension task with a SAS presented 0-125 ms following a visual go-signal. Results were not different to those predicted by an additive model (p=0.979), yet were significantly different to those predicted by a horse-race model (p=0.037), indicating a joint contribution of voluntary and involuntary activation, even when the IS and SAS are of different modalities. Furthermore, the results indicated that voluntary RT differences due to stimulus modality are attributable to processes that occur prior to the increase in initiation-related activation.
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Affiliation(s)
- Dana Maslovat
- School of Kinesiology, University of British Columbia, Vancouver, Canada; Department of Kinesiology, Langara College, Vancouver, Canada
| | - Neil M Drummond
- School of Human Kinetics, University of Ottawa, Ottawa, Canada
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16
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Kaimala S, Kumar S. An evolutionarily conserved non-coding element in casein locus acts as transcriptional repressor. Gene 2015; 554:75-80. [PMID: 25455101 DOI: 10.1016/j.gene.2014.10.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 10/07/2014] [Accepted: 10/10/2014] [Indexed: 12/31/2022]
Abstract
In mammals, the casein locus consists of stretches of non-coding DNA, the functions of most of which are unknown. These regions are believed to harbour elements responsible for spatio-temporally regulated expression of genes in this locus and so far, only a few such elements have been identified. In this study, we report a novel regulatory element in the casein locus. Comparative analysis of genomic DNA sequences of casein loci from different mammals identified a 147bp long evolutionarily conserved region (ECR) upstream of Odam, a gene in this locus. The ECR was found in close proximity of Odam gene in all the mammals examined. In-silico analysis predicted the ECR as a potential regulatory element. Functional analysis in different cell lines identified it as a unidirectional repressor element. From our findings we speculate that the ECR may be involved in the repression of the Odam expression in the mammary gland during lactation.
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Affiliation(s)
- Suneesh Kaimala
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research (CSIR), Hyderabad, India.
| | - Satish Kumar
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research (CSIR), Hyderabad, India.
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Maslovat D, Carter MJ, Kennefick M, Carlsen AN. Startle neural activity is additive with normal cortical initiation-related activation. Neurosci Lett 2013; 558:164-8. [PMID: 24269874 DOI: 10.1016/j.neulet.2013.11.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 11/07/2013] [Accepted: 11/09/2013] [Indexed: 11/17/2022]
Abstract
The current study examined the process of response initiation in a simple reaction time (RT) task using a startling acoustic stimulus (SAS), which has been shown to trigger a prepared movement through an involuntary initiation pathway. The SAS was presented within the RT interval (concurrent with, and 25, 50, 75, 100, and 125 ms following the "go" signal), with the observed response latency used to examine the relative contributions of voluntary and involuntary activation to response initiation. Our results clearly indicate that both voluntary and startle-related initiation activation jointly contribute to the observed RT. The data support a model in which startle-related neural activity is additive with voluntary cortical initiation-related activation. This result also provides indirect support for the hypothesis that both voluntary and SAS-related involuntary activation involve a similar process of response output.
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Affiliation(s)
- Dana Maslovat
- School of Kinesiology, University of British Columbia, Vancouver, Canada
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18
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Hayduk-Costa G, Drummond NM, Carlsen AN. Anodal tDCS over SMA d ecreases the probability of withholding an anticipated action. Behav Brain Res 2013; 257:208-14. [PMID: 24064279 DOI: 10.1016/j.bbr.2013.09.030] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 09/09/2013] [Accepted: 09/14/2013] [Indexed: 01/06/2023]
Abstract
Previous research has shown that the supplementary motor area (SMA) is critical in movement inhibition. Recently it was shown that applying transcranial direct current stimulation (tDCS) over SMA affected participants' ability to inhibit their movement in a stop-signal reaction time task (Hsu et al. [11]). Of interest in the current study was whether modulating SMA excitability using tDCS would have similar effects in an anticipation-timing stop-signal task. Participants performed 2 sessions each consisting of a pre- and post-tDCS block of 160 trials in which they were instructed to extend their wrist concurrently with the arrival of a pointer to a target (i.e., a clock hand reaching a set position). In 20% of trials (stop trials) the pointer stopped 80, 110, 140, 170, or 200 ms prior to the target, and on these trials participants were instructed to inhibit their movement if possible. Anodal and cathodal tDCS (separated by at least 48 h) was applied for each participant between the pre- and post-tDCS blocks. No change in the proportion of successfully inhibited movements on stop trials was found following cathodal tDCS (p>.05). However, anodal tDCS resulted in a decreased proportion of successfully inhibited movements on stop trials (p=002), and an earlier movement onset on control trials (p<.01). This suggests that the SMA may be more involved in initiation than in inhibition of anticipatory movements. Furthermore these data suggest that differences in initiation and inhibitory processes exist between stop-signal reaction time and anticipation-timing stop-signal tasks.
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Haslam TM, Kunst L. Extending the story of very-long-chain fatty acid elongation. Plant Sci 2013; 210:93-107. [PMID: 23849117 DOI: 10.1016/j.plantsci.2013.05.008] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/01/2013] [Accepted: 05/03/2013] [Indexed: 05/18/2023]
Abstract
Very-long-chain fatty acids (VLCFAs) are essential molecules produced by all plant cells, and are components or precursors of numerous specialized metabolites synthesized in specific cell types. VLCFAs are elongated by an endoplasmic reticulum-localized fatty acid elongation complex of four core enzymes, which sequentially add two carbon units to a growing acyl chain. Identification and characterization of these enzymes in Arabidopsis thaliana has revealed that three of the four enzymes act as generalists, contributing to all metabolic pathways that require VLCFAs. A fourth component, the condensing enzyme, provides substrate specificity and determines the amount of product synthesized by the entire complex. Land plants have two families of condensing enzymes, FATTY ACID ELONGATION 1 (FAE1)-type ketoacyl-CoA synthases (KCSs) and ELONGATION DEFECTIVE-LIKEs (ELO-LIKEs). Our current knowledge of the specific roles of different condensing enzymes is incomplete, as is our understanding of the biological function of a recently characterized family of proteins, CER2-LIKEs, which contribute to condensing enzyme function. More broadly, the stoichiometry and quaternary structure of the fatty acid elongase complex remains poorly understood, and specific phylogenetic and biochemical questions persist for each component of the complex. Investigation of VLCFA elongation in different organisms, structural biochemistry, and cell biology approaches stand to greatly benefit this field of plant biology.
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Affiliation(s)
- Tegan M Haslam
- Department of Botany, University of British Columbia, 3529-6270 University Boulevard, Vancouver, BC, Canada
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20
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Roche MJ, Pincus AL, Hyde AL, Conroy DE, Ram N. Within-person Covariation of Agentic and Communal Perceptions: Implications for Interpersonal Theory and Assessment. J Res Pers 2013; 47:445-452. [PMID: 24072945 PMCID: PMC3780453 DOI: 10.1016/j.jrp.2013.01.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Interpersonal theory identifies agency and communion as uncorrelated (orthogonal) dimensions, largely evidenced by research examining between-person analyses of single-occasion measures. However, longitudinal studies of interpersonal behavior demonstrated the within-person association of agency and communion is not orthogonal for many individuals, and between-person differences in these associations relate to adjustment. We applied a similar approach to investigate the association of interpersonal perceptions. 184 university students completed a 7-day event-contingent study of their interpersonal experiences. Using multilevel regression models, we demonstrated that agentic and communal perceptions were positively associated, and the strength of this within-person association was moderated by between-person scores of dependency and narcissism. We discuss the benefits of incorporating within-person interpersonal associations (termed interpersonal covariation) into interpersonal theory and assessment.
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Vdovenko MM, Hung CT, Sakharov IY, Yu FY. Determination of okadaic acid in shellfish by using a novel chemiluminescent enzyme-linked immunosorbent assay method. Talanta 2013; 116:343-6. [PMID: 24148413 DOI: 10.1016/j.talanta.2013.05.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 05/22/2013] [Accepted: 05/23/2013] [Indexed: 10/26/2022]
Abstract
A direct competitive chemiluminescent enzyme-linked immunosorbent assay (CL-ELISA) was developed to determine okadaic acid (OA). Concentrations of the capture monoclonal anti-OA antibodies, conjugate of OA-HRP and a composition of blocking buffers were varied to optimize the assay condition. The values of IC10, IC50 and working range (IC20-IC80) for CL-ELISA were 0.01, 0.07, and 0.03-0.2 ng/mL, respectively. Additionally, the analytical recovery values of CL-ELISA from 3 shellfish spiked samples with OA concentrations of 0.03, 0.1 and 0.2 ng/mL ranged from 86.7% to 111.2%. Closely examining the OA concentrations in 19 various shellfish products performed by CL-ELISA revealed that OA concentrations in 6 of the 19 examined samples was undetected, whereas the 13 samples were contaminated with low levels of OA ranging from 1.2 to 8.0 ng/g.
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Affiliation(s)
- Marina M Vdovenko
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
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