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Miura M, Furuya T, Hashimoto M, Shiratani Y, Inoue T, Yunde A, Okimatsu S, Hosokawa H, Maki S, Ohtori S. Differences in the expression of myelopathy in a rat model of chronic spinal cord compression. J Spinal Cord Med 2024; 47:450-458. [PMID: 35993796 PMCID: PMC11044740 DOI: 10.1080/10790268.2022.2111048] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/15/2022] Open
Abstract
CONTEXT/OBJECTIVE The degree of spinal cord compression does not always parallel neurological symptoms. We considered that some compensatory neuroprotective mechanism underlies the expression of this neurological phenotype. Oxygen-regulated-protein 150 (ORP150) is neuroprotective and expressed in neurons in response to neuronal ischemia. We sought to elucidate whether ORP150 expression is associated with the severity and variation of neurological recovery in our rat model of chronic spinal cord compression. METHODS We made a rat model of chronic spinal cord compression inserting an expandable water-absorbing polyurethane sheet. A neurological behavioral assessment of the severity of paralysis was performed for 10 weeks postoperatively. The rat model was defined as two groups: a myelopathy group with decreased locomotor function and an asymptomatic group. At 10 weeks postoperatively, the spinal cord of the cervical segment was resected for histology and qPCR. RESULTS Slowly progressive paralysis appeared at 5-10 weeks postoperatively in 53% of the rats with spinal cord compression. The asymptomatic group had no histological changes indicative of myelopathy. Histology and qPCR showed increased expression of ORP150 in the asymptomatic group, but the ratio of ORP150-positive neuron in the two groups was not significantly different. CONCLUSION The expression of ORP150 in neurons associated with spinal cord compression suggested that the spinal cord was under ischemic stress due to compression, but relation to the development of myelopathy was unclear. The results suggested that some other compensatory mechanisms may exist in response to spinal cord compression in asymptomatic rats.
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Affiliation(s)
- Masataka Miura
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takeo Furuya
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | | | - Yuki Shiratani
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Takaki Inoue
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Atsushi Yunde
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Sho Okimatsu
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hiroaki Hosokawa
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Satoshi Maki
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Seiji Ohtori
- Department of Orthopaedic Surgery, Graduate School of Medicine, Chiba University, Chiba, Japan
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Valido E, Bertolo A, Hertig-Godeschalk A, Flueck JL, Ruettimann B, Glisic M, Stoyanov J. Characteristics of the gut microbiome of Swiss elite athletes with a spinal cord injury: An exploratory study. J Spinal Cord Med 2024:1-9. [PMID: 38207282 DOI: 10.1080/10790268.2023.2265610] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2024] Open
Abstract
OBJECTIVES To illustrate and explore associations between the gut microbiome and spinal cord injury (SCI) characteristics, physical training, dietary intake, body composition, and blood biomarkers of elite Swiss athletes. DESIGN AND SETTING Baseline data analysis of athletes with SCI who participated in a pilot trial (NCT04659408) in the Swiss Paraplegic Center, Nottwil, Switzerland. PARTICIPANTS Elite athletes, five males, and six females, with SCI who competed internationally. OUTCOME MEASURES We conducted a differential abundance analysis and measured the alpha and beta diversity of the gut microbiome. RESULTS The athletes' median age was 34.5 years. Six had traumatic SCI and five had a spina bifida. The athletes competed in para-cycling (5), wheelchair athletics (3), and wheelchair tennis (3). A higher duration of training per week was positively associated with Akkermansia and Akkermansiaceae but negatively associated with Prevotellaceae. Muribaculaceae was negatively associated with the average number of trainings per week. Waist circumference is negatively associated with Butyricimonas. Significant differences in the alpha diversity were found with sex, gastrointestinal quality of life index (GIQLI) scores, total caloric intake, total fat intake, total carbohydrate intake, and high-sensitivity C-reactive protein (hs-CRP). Beta diversity differences were found with impairment of the sympathetic nervous system of the gut at the genus level and HbA1c at the family level. CONCLUSIONS This study provides insight into the gut microbiome of athletes with SCI. Our results were similar to those found in athletes without SCI. Further replication is needed to confirm the relationships of organisms observed in the gut of athletes with SCI.
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Affiliation(s)
- Ezra Valido
- Swiss Paraplegic Research, Nottwil, Switzerland
- Faculty of Health Sciences, University of Lucerne, Lucerne, Switzerland
| | - Alessandro Bertolo
- Swiss Paraplegic Research, Nottwil, Switzerland
- Department of Orthopedic Surgery, University of Bern, Bern Inselspital, Bern, Switzerland
| | | | - Joelle Leonie Flueck
- Institute of Sports Medicine, Swiss Paraplegic Centre Nottwil, Nottwil, Switzerland
| | - Belinda Ruettimann
- Institute of Sports Medicine, Swiss Paraplegic Centre Nottwil, Nottwil, Switzerland
| | - Marija Glisic
- Swiss Paraplegic Research, Nottwil, Switzerland
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
| | - Jivko Stoyanov
- Swiss Paraplegic Research, Nottwil, Switzerland
- Institute of Social and Preventive Medicine (ISPM), University of Bern, Bern, Switzerland
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Jackendoff R. The Parallel Architecture in Language and Elsewhere. Top Cogn Sci 2023. [PMID: 37801675 DOI: 10.1111/tops.12698] [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: 07/18/2023] [Revised: 09/13/2023] [Accepted: 09/18/2023] [Indexed: 10/08/2023]
Abstract
The Parallel Architecture is a conception of the organization of the mental representations involved in language and of the role of language in the mind as a whole. Its basic premise is that linguistic representations draw on three independent generative systems-phonological, syntactic, and semantic structures-plus a system of interface links by which they communicate with each other. In particular, words serve as partial interface links that govern the way they compose into novel sentences. It is shown that this architecture also provides a natural way to account for our ability to talk about what we see: semantic structure in language has to communicate via interface links with a level of spatial representation that encodes understanding of the physical world. It is suggested that such configurations of independent but linked representations are a widespread feature of cognition.
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Affiliation(s)
- Ray Jackendoff
- Center for Cognitive Studies, Tufts University
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology
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4
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Roshid MM, Ibna Seraj PM. Interrogating higher education's responses to international student mobility in the context of the COVID-19 pandemic. Heliyon 2023; 9:e13921. [PMID: 36843958 PMCID: PMC9942452 DOI: 10.1016/j.heliyon.2023.e13921] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 01/31/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
Since the COVID-19 pandemic, international higher education and student mobility have faced tremendous pressure and challenges. To address COVID-induced challenges and stress, higher education institutions and host governments undertook responses. This article has humanistically looked into the institutional responses of host universities and governments to international higher education and student mobilities during the COVID-19 pandemic. Informed by a systematic literature review of publications released between 2020 and 2021 in a wide range of academic sources, we argue that many of these responses were problematic and did not adequately maintain student well-being and fairness; instead, international students were treated to some extent with poor services in the host countries. To situate our comprehensive overview and propose ideas for forward-thinking conceptualisation, policy, and practice in higher education in the context of the ongoing pandemic, we engage with the literature on ethical and humanistic internationalisation of higher education and (international) student mobilities.
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Key AP, Roth S, Jones D, Hunt-Hawkins H. Typical and atypical neural mechanisms support spoken word processing in Angelman syndrome. Brain Lang 2023; 236:105215. [PMID: 36502770 PMCID: PMC9839587 DOI: 10.1016/j.bandl.2022.105215] [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] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 07/11/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
Angelman syndrome (AS) is known to affect expressive and receptive communication abilities. This study examined individual differences in neural mechanisms underlying speech processing in children with AS (n = 24, M age = 10.01 years) and typical development (n = 30, M age = 10.82 years) using auditory event-related potentials during passive listening to common English words and novel pseudowords. A group of adults with AS (n = 7, M = 31.78 years) provided data about the upper developmental range. The typically developing group demonstrated the expected more negative amplitudes in response to words than pseudowords within 250-500 ms after stimulus onset at the left temporal scalp region. Children and adults with AS exhibited a similar left-lateralized pattern of word-pseudoword differentiation at temporal and parietal regions, but not the midline parietal memory response for known words observed in the typically developing group, suggesting typical-like word-pseudoword differentiation along with possible alterations in the automatic recall of word meaning. These results have important implications for understanding receptive and expressive communication processes in AS and support the use of auditory neural responses for characterizing individual differences in neurodevelopmental disorders with limited speech.
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Affiliation(s)
- Alexandra P Key
- Vanderbilt Kennedy Center for Research on Human Development, Nashville, TN 37203, USA; Vanderbilt University Medical Center, Nashville, TN 37232, USA.
| | - Sydney Roth
- Vanderbilt University, Nashville, TN 37235, USA
| | - Dorita Jones
- Vanderbilt Kennedy Center for Research on Human Development, Nashville, TN 37203, USA; Vanderbilt University Medical Center, Nashville, TN 37232, USA
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Kinoshita H. Finger friction with leather and seam of new and used softballs with and without rosin powder. Sports Biomech 2022:1-14. [PMID: 35678234 DOI: 10.1080/14763141.2022.2085163] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 05/27/2022] [Indexed: 10/18/2022]
Abstract
The purpose of this study was to investigate the friction of finger against polyurethane-coated leather and seam surfaces of new and used softballs. The effects of seam alignment (across and along the seam) and chalk/rosin powder application were also investigated. The coefficient of static friction (COF) was evaluated on 14 college female softball players who rubbed the pad of their index finger on a test surface fixed on a biaxial force plate. The mean COF of the new leather was 1.04, and those of the seam were 1.16 for the across condition, and 1.07 for the along condition. The leather-seam difference in COF was significant. The used ball's leather and seam had lower COF than those of the new ball. The seam alignment difference did not reach the level of significance. For both new and used balls, the application of chalk/rosin powder to the finger reduced COF, and the reduction was greater on the leather than on the seam. It was concluded that the outer cover of softballs, and especially the seam portions, is equipped with reasonably high friction under natural finger condition. The friction is reduced in used balls and with the use of chalk/rosin powder.
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Affiliation(s)
- Hiroshi Kinoshita
- Common Education Center, Osaka Aoyama University, Minoo city, Osaka, Japan
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7
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Irusteta L, Ramírez-Miranda A, Navas-Pérez A, Montes-Almanza L, Arteaga J, García-Martínez F, Graue-Hernández E, Zenteno JC. Detailed phenotypic description of stromal corneal dystrophy in a large pedigree carrying the uncommon TGFBI p.Ala546Asp pathogenic variant. Ophthalmic Genet 2022; 43:589-593. [PMID: 35470743 DOI: 10.1080/13816810.2022.2068047] [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] [Indexed: 10/18/2022]
Abstract
PURPOSE The purpose of this study is to describe the corneal clinical spectrum and the intrafamilial phenotypic differences in an extended pedigree suffering from stromal corneal dystrophy due to the rare p.Ala546Asp mutation in TGFBI. METHODS A total of 15 members from a four-generation Mexican family were ascertained for clinical and genetic assessment. All individuals underwent slit-lamp biomicroscopic examination and an extensive ophthalmological examination including corneal topography (OCULUS Pentacam® AXL), corneal biomechanics (OCULUS Corvis ST), and corneal confocal biomicroscopy (Heidelberg Engineering®). A total of 10 individuals carried the heterozygous c.1637C>A (p. Ala546Asp) mutation at TGFBI exon 12. RESULTS Nine out of 10 mutation positive patients were available for clinical characterization. The mean age was 35.5 years, with the youngest and the eldest ones being 3 years old and 62 years old, respectively. The median age of onset of the symptoms was 19.7 years. Five (55.6%) patients presented with a predominantly granular corneal dystrophy type 2 (GCD2) phenotype, one presented with a lattice corneal dystrophy (LCD) phenotype, and one with a granular corneal dystrophy type 1 (GCD1) phenotype. Interestingly, two mutation positive subjects had no clinical deposits in the cornea, demonstrating incomplete penetrance of the disorder in this family. CONCLUSIONS Clinical differences in corneal phenotypes within this CD family and with other pedigrees carrying the same TGFBI genetic defect could be explained by the age of clinical examination of individual patients and/or by the presence of genetic and/or environmental modifiers.
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Affiliation(s)
- Leire Irusteta
- Department of Cornea, External Disease, and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Arturo Ramírez-Miranda
- Department of Cornea, External Disease, and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Alejandro Navas-Pérez
- Department of Cornea, External Disease, and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Luis Montes-Almanza
- Research Unit-Genetics Department, Institute of Ophthalmology, "Conde de Valenciana", Mexico City, Mexico
| | - José Arteaga
- Department of Cornea, External Disease, and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Froylán García-Martínez
- Research Unit-Genetics Department, Institute of Ophthalmology, "Conde de Valenciana", Mexico City, Mexico
| | - Enrique Graue-Hernández
- Department of Cornea, External Disease, and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Juan C Zenteno
- Research Unit-Genetics Department, Institute of Ophthalmology, "Conde de Valenciana", Mexico City, Mexico.,Department of Biochemistry, Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico
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Soga T, Suzuki N, Kato K, Kawamoto-Hirano A, Kawauchi Y, Izumi R, Toyoshima M, Mitsuzawa S, Shijo T, Ikeda K, Warita H, Katori Y, Aoki M, Kato M. Long-term outcomes after surgery to prevent aspiration for patients with amyotrophic lateral sclerosis. BMC Neurol 2022; 22:94. [PMID: 35296264 DOI: 10.1186/s12883-022-02619-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 03/07/2022] [Indexed: 11/24/2022] Open
Abstract
Background Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease that affects motor neurons selectively. In particular, weakness in respiratory and swallowing muscles occasionally causes aspiration pneumonia and choking, which can be lethal. Surgery to prevent aspiration, which separates the trachea and esophagus, can reduce the associated risks. Central-part laryngectomy (CPL) is a relatively minimally invasive surgery to prevent aspiration. No studies have been conducted on the long-term outcomes of surgery to prevent aspiration in patients with ALS. This case series aimed to determine the long-term outcomes of surgery to prevent aspiration and the use of a continuous low-pressure aspirator in patients with ALS by evaluating the frequency of intratracheal sputum suctions performed per day, intra- and postoperative complications, oral intake data, and satisfaction of patients and their primary caregiver to predict improvement in patients’ quality of life (QOL). Methods We report a case series of six patients with ALS who underwent CPL along with tracheostomy to prevent aspiration between January 2015 and November 2018. We evaluated their pre- and postoperative status and administered questionnaires at the time of last admission to the patients and their primary caregivers. Results The mean follow-up period after CPL was 33.5 months. Aerophagia was a common postoperative complication. The use of a continuous low-pressure aspirator resulted in reduced frequency of intratracheal sputum suctions. All cases avoided aspiration pneumonia. Oral intake was continued for 2–4 years after the tracheostomy and CPL. The satisfaction levels of the patient and primary caregiver were high. Conclusion Our case series suggests that the use of a continuous low-pressure aspirator in patients undergoing CPL improves oral intake and reduces the frequency of intratracheal sputum suctions, which improves the QOL of patients with ALS and their families and caregivers. CPL and continuous low-pressure aspiration should be considered as a management option for ALS with significant bulbar and respiratory muscle weakness/dysfunction. Supplementary Information The online version contains supplementary material available at 10.1186/s12883-022-02619-z.
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Birungi N, Fadnes LT, Engebretsen IMS, Tumwine JK, Lie SA, Åstrøm AN. Caries experience by socio-behavioural characteristics in HIV-1-infected and uninfected Ugandan mothers - a multilevel analysis. Acta Odontol Scand 2022; 80:91-98. [PMID: 34176405 DOI: 10.1080/00016357.2021.1942544] [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] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To assess caries experience in Ugandan mothers according to HIV status, socio-behavioural-characteristics, gingival bleeding status and to examine whether HIV status impacts the association of socio-behavioural characteristics with caries experience. Third, using multilevel analysis, this study assessed to what extent surface-specific caries experience varied between and within individuals. MATERIALS AND METHODS Caries experience was recorded using the World Health Organization's Decayed, Missed and Filled Teeth/Surfaces indices from a cohort of 164 HIV-1-infected Ugandan mothers and a cross sectional comparison group of 181 negative controls. Mixed-effects logistic regression was conducted with surface-specific caries experience as the outcome variable. RESULTS The prevalence of caries in HIV-1-infected and uninfected mothers was 81% and 71%, respectively. Significant associations occurred between caries experience at surface level and women's increasing age (odds ratio [OR] = 1.8, 95% confidence interval [CI]: 1.1-2.8) and presence of gingival bleeding (OR = 2.0, 95% CI: 1.2-3.2). Intra-class correlation (ICC) coefficient amounted to 0.54 (95% CI 0.48‒0.59). CONCLUSIONS Caries prevalence was higher in HIV-1 infected than in uninfected mothers and increased with age and gingival bleeding. ICC indicated that 54% of the variance was attributable to variation between individuals. Socio-demographic differences in dental caries did not vary by HIV-1 status.
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Affiliation(s)
- Nancy Birungi
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Lars Thore Fadnes
- Department of Global Health and Primary Care, University of Bergen, Bergen, Norway
- Department of Addiction Medicine, Haukeland University Hospital, Bergen, Norway
| | | | - James Kashugyera Tumwine
- Department of Paediatrics’ and Child Health, School of Medicine, College of Health Sciences, Makerere University Kampala, Kampala, Uganda
| | - Stein Atle Lie
- Department of Clinical Dentistry, University of Bergen, Bergen, Norway
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Perikova E, Blagovechtchenski E, Filippova M, Shcherbakova O, Kirsanov A, Shtyrov Y. Anodal tDCS over Broca's area improves fast mapping and explicit encoding of novel vocabulary. Neuropsychologia 2022;:108156. [PMID: 35026217 DOI: 10.1016/j.neuropsychologia.2022.108156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 12/09/2021] [Accepted: 01/08/2022] [Indexed: 11/24/2022]
Abstract
An accumulating body of evidence suggests that transcranial direct current stimulation (tDCS) can be used to modulate speech processing both in healthy individuals and in patients with speech disorders. There has been, however, no comprehensive study of effects of tDCS of the core language areas in relation to the main word-learning mechanisms. Two principal strategies have been posited as important for natural word acquisition: explicit encoding (EE) which relies on direct instructions and repetition of material, and fast mapping (FM) which operates implicitly, via context-based inference or deduction. We used anodal and cathodal tDCS of Broca's and Wernicke's areas to assess effects of stimulation site and polarity on novel word acquisition in both EE and FM regimes. 160 participants, divided into five groups, received 15 min of cathodal or anodal tDCS over one of the two areas or a sham (placebo) stimulation before learning eight novel words, presented ten times each in a short naturalistic audio-visual word-picture association session, fully counterbalanced across different learning regimes. Behavioural outcome of novel word acquisition was measured immediately after the training in a free recall task, which showed elevated accuracy in all real stimulation groups in comparison with sham stimulation; however, this effect only reached full significance after anodal tDCS of Broca's area. Comparisons between the two learning modes indicated that Broca's anodal tDCS significantly improved both implicit and explicit acquisition of novel vocabulary in comparison with sham tDCS, without, however, any significant differences between EE and FM regimes as such. The results indicate involvement of the left inferior-frontal neocortex in the learning of novel vocabulary and suggest a possibility to promote different types of word acquisition using anodal tDCS of this area.
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Hori Y, Ohmine K, Katada H, Noguchi Y, Sato K, Nambu T, Adeline LR, Wan GS, Haraya K, Ozeki K, Nanami M, Tachibana T, Sampei Z, Kuramochi T, Nezu J, Hattori K, Igawa T. Elimination of plasma soluble antigen in cynomolgus monkeys by combining pH-dependent antigen binding and novel Fc engineering. MAbs 2022; 14:2068213. [PMID: 35482905 PMCID: PMC9067469 DOI: 10.1080/19420862.2022.2068213] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
A conventional antibody targeting a soluble antigen in circulation typically requires a huge dosage and frequent intravenous administration to neutralize the antigen. This is because antigen degradation is reduced by the formation of antigen–antibody immune complexes, which escape from lysosomal degradation using neonatal Fc receptor (FcRn)-mediated recycling. To address this, we developed an antigen-sweeping antibody that combines pH-dependent antigen binding and Fc engineering to enhance Fc receptor binding. The sweeping antibody actively eliminates the plasma antigens by increasing the cellular uptake of the immune complex and dissociating the antigens in the acidic endosome for degradation. Strong antigen sweeping can reduce the dosage, potentially achieve higher efficacy, and expand the scope of antigen space available for targeting by antibodies. In this study, to further improve the sweeping efficacy, we developed a novel antibody Fc variant by enhancing Fcγ receptor IIb (FcγRIIb) binding and modulating charge characteristics for increased cellular uptake of the immune complex, together with enhancing FcRn binding for efficient salvage of the antigen-free antibodies. Our Fc variant achieved strong antigen sweeping in cynomolgus monkeys with antibody pharmacokinetics comparable to a wild-type human IgG1 antibody. The positive-charge substitutions enhanced uptake of the immune complex by FcγRIIb-expressing cells in vitro, which was completely inhibited by an anti-FcγRIIb antibody. This suggests that the strong in vivo sweeping efficacy improved by the charge engineering is more likely achieved by FcγRIIb-dependent uptake of the immune complex rather than nonspecific uptake. We expect this novel Fc engineering can maximize the antigen sweeping efficacy even in humans and create novel therapeutic antibodies that meet unmet medical needs for patients.
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Affiliation(s)
- Yuji Hori
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | - Ken Ohmine
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | | | - Yuki Noguchi
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | - Kazuki Sato
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | | | | | | | - Kenta Haraya
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | - Kazuhisa Ozeki
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | - Masahiko Nanami
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | | | - Zenjiro Sampei
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | - Taichi Kuramochi
- Research Division, Chugai Pharmaceutical Co, Ltd, Gotemba, Japan
| | - Junichi Nezu
- Research Division, Chugai Pharmaceutical Co, Ltd, Chuo-ku, Tokyo, Japan
| | - Kunihiro Hattori
- Research Division, Chugai Pharmaceutical Co, Ltd, Kamakura, Japan
| | - Tomoyuki Igawa
- Research Division, Chugai Pharmaceutical Co, Ltd, Chuo-ku, Tokyo, Japan
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Abstract
Assessments of the decriminalization of homosexuality are rarely questioned. It is widely accepted that the Ottomans decriminalized homosexuality in 1858 owing to the absence of penalties assigned to private same-sex intimacy. The reason for this misanalysis rests upon the universalization of the Western formula for the decriminalization of homosexuality. This assumption about the Ottomans has been made without examining how they had criminalized homosexuality in the first place. Two penal cultures that criminalized homosexuality differently cannot decriminalize it by way of the same legal framework. The current method excludes, moreover, the subject country's history. This elicits neo-orientalist conclusions such as the Ottomans' decriminalization of homosexuality in 1858 via the introduction of the 1810 French Penal Code, without an accompanying examination of how the Ottomans had criminalized homosexuality before 1858. This assessment method not only facilitates neo-orientalism, but also casts a significant doubt on this method's validity.
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13
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Feng C, Gu R, Li T, Wang L, Zhang Z, Luo W, Eickhoff SB. Separate neural networks of implicit emotional processing between pictures and words: A coordinate-based meta-analysis of brain imaging studies. Neurosci Biobehav Rev 2021; 131:331-344. [PMID: 34562542 DOI: 10.1016/j.neubiorev.2021.09.041] [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: 03/24/2021] [Revised: 09/14/2021] [Accepted: 09/21/2021] [Indexed: 02/02/2023]
Abstract
Both pictures and words are frequently employed as experimental stimuli to investigate the neurocognitive mechanisms of emotional processing. However, it remains unclear whether emotional picture processing and emotional word processing share neural underpinnings. To address this issue, we focus on neuroimaging studies examining the implicit processing of affective words and pictures, which require participants to meet cognitive task demands under the implicit influence of emotional pictorial or verbal stimuli. A coordinate-based activation likelihood estimation meta-analysis was conducted on these studies, which revealed no common activation maximum between the picture and word conditions. Specifically, implicit negative picture processing (35 experiments, 393 foci, and 932 subjects) engages the bilateral amygdala, left hippocampus, fusiform gyri, and right insula, which are mainly located in the subcortical network and visual network associated with bottom-up emotional responses. In contrast, implicit negative word processing (34 experiments, 316 foci, and 799 subjects) engages the default mode network and fronto-parietal network including the ventrolateral prefrontal cortex, dorsolateral prefrontal cortex, and dorsomedial prefrontal cortex, indicating the involvement of top-down semantic processing and emotion regulation. Our findings indicate that affective pictures (that intrinsically have an affective valence) and affective words (that inherit the affective valence from their object) modulate implicit emotional processing in different ways, and therefore recruit distinct brain systems.
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Affiliation(s)
- Chunliang Feng
- Key Laboratory of Brain, Cognition and Education Sciences (South China Normal University), Ministry of Education, Guangzhou, China; Guangdong Provincial Key Laboratory of Mental Health and Cognitive Science, Center for Studies of Psychological Application, School of Psychology, South China Normal University, Guangzhou, China.
| | - Ruolei Gu
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.
| | - Ting Li
- Institute of Brain Research and Rehabilitation (IBRR), South China Normal University, Guangzhou, China
| | - Li Wang
- Collaborative Innovation Center of Assessment for Basic Education Quality, Beijing Normal University, Beijing, China
| | - Zhixing Zhang
- Key Laboratory of Brain, Cognition and Education Sciences (South China Normal University), Ministry of Education, Guangzhou, China; Guangdong Provincial Key Laboratory of Mental Health and Cognitive Science, Center for Studies of Psychological Application, School of Psychology, South China Normal University, Guangzhou, China
| | - Wenbo Luo
- Research Center of Brain and Cognitive Neuroscience, Liaoning Normal University, Dalian, China
| | - Simon B Eickhoff
- Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany; Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany
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14
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Abstract
PURPOSE The aim of this article is to describe the technical development in proteomics during the last two decades with the focus on its use in radiation biology. It is written from a subjective point of view and aims not to be a scientific review of the subject. CONCLUSION Proteomics is a fast developing technique and it has already contributed greatly to our understanding of biological mechanisms following radiation exposure. Novel proteomics approaches can be used in adequately designed cellular and animal experiments and above all in big clinical trials to investigate effects of ionizing radiation in the future.
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Affiliation(s)
- Soile Tapio
- Institute of Radiation Biology and Institute for Biological and Medical Imaging, Helmholtz Center Munich, German Research Center for Environmental Health GmbH, Neuherberg, Germany
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15
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Ren S, Shao H, He S. Interaction Between Conscious and Unconscious Information-Processing of Faces and Words. Neurosci Bull 2021. [PMID: 34170485 DOI: 10.1007/s12264-021-00738-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 03/02/2021] [Indexed: 10/21/2022] Open
Abstract
It is widely acknowledged that holistic processing is a key characteristic of face perception. Although holistic processing implies the automatic integration of face parts, it is unclear whether such processing requires the awareness of face parts. Here, we investigated the interactions between visible face parts and face parts rendered invisible using continuous flash suppression (CFS). In the first experiment with the upper half-face visible and the lower half-face invisible, the results showed that perceived face identity was influenced by the invisible lower half-face, suggesting that integration occurs between the visible and invisible face parts, a variant of the "composite face effect". In the second experiment, we investigated the influence of visible face parts on the processing of invisible face parts, as measured by the time it took for the invisible parts to break out from CFS. The results showed a visible-to-invisible facilitation effect, that the aligned invisible face parts broke through CFS faster than when the visible and invisible face parts were misaligned. Visible eyes had a stronger influence on the invisible nose/mouth than the other way around. Such facilitation of processing from visible to invisible parts was also found when Chinese characters were used as stimuli. These results show that information integration occurs across the consciousness boundary.
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16
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Kimura T, Tokunaga R, Hashimoto Y, Nakamura N, Kishida A. Tumor growth suppression by implantation of an anti-CD25 antibody-immobilized material near the tumor via regulatory T cell capture. Sci Technol Adv Mater 2021; 22:607-615. [PMID: 34377087 PMCID: PMC8344258 DOI: 10.1080/14686996.2021.1944782] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/11/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
In this study, we designed and synthesized an implantable anti-CD25 antibody-immobilized polyethylene (CD25-PE) mesh to suppress tumor growth by removing regulatory T cells (Tregs). The PE mesh was graft-polymerized with poly(acrylic acid), and the anti-mouse CD25 antibody was then immobilized using the 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide reaction. Immobilization of the antibody on the PE mesh was confirmed by immunostaining. The CD25-PE mesh could effectively and selectively capture CD25-positive cells through antigen-antibody interactions when the CD25-PE mesh was incubated with a suspension of mouse spleen cells, including CD25-positive cells. In addition, implantation of the CD25-PE mesh into mice subcutaneously demonstrated the Treg-capturing ability of the CD25-PE mesh with only a weak inflammatory reaction. In tumor-bearing mice, tumor growth was suppressed by subcutaneous implantation of the CD25-PE mesh near the tumor for 1 week. These results suggested that the anti-CD25 antibody-immobilized material could capture Tregs in vivo and inhibit tumor proliferation in a limited tumor-bearing mouse model. Further research is needed to facilitate cancer immunotherapy using implantable anti-CD25 antibody-immobilized material as a Treg-capturing device.
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Affiliation(s)
- Tsuyoshi Kimura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Rino Tokunaga
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yoshihide Hashimoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Naoko Nakamura
- Department of Bioscience and Engineering, College of Systems Engineering and Science, Shibaura Institute of Technology, Tokyo, Japan
| | - Akio Kishida
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
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17
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Korko M, Coulson M, Jones A, de Mornay Davies P. Types of interference and their resolution in monolingual word production. Acta Psychol (Amst) 2021; 214:103251. [PMID: 33485153 DOI: 10.1016/j.actpsy.2021.103251] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/10/2020] [Accepted: 01/04/2021] [Indexed: 11/24/2022] Open
Abstract
There is growing evidence that speakers recruit inhibitory control in situations of high within-language interference, e.g., when selecting from among competing lexical entries or when tailoring utterances to the communicative needs of the addressee. However, little is known about the types of cognitive control mechanisms that are involved in the speech production process. This study examines the relative contribution of various forms of interference arising at different stages of information processing as well as their control to object naming under conditions of prepotent and underdetermined competition. Eighty-nine unimpaired native English speakers completed three inhibitory control tasks (arrow flanker, Simon arrow and anti-saccade) and two object naming tasks (picture-word interference, PWI, and name agreement, NA). Analyses of mean RT and RT distribution (delta plots) showed that only the flanker effect was a significant predictor of the PWI but not NA effect, while the remaining inhibitory measures made no significant contribution to either the PWI or NA effect. Participants with smaller flanker effects, indicative of better resolution of representational conflict, were faster to name objects in the face of competing stimuli. The pattern of results suggests that delays in production can be an outcome of inefficient resolution of interference traced to intermediate rather than late stages of processing, at least as far as the PWI task is concerned.
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Wen Y, Gwendoline CLQ, Lau SY. ICT-Supported Home-Based Learning in K-12: a Systematic Review of Research and Implementation. TechTrends 2021; 65:371-378. [PMID: 33458719 PMCID: PMC7801563 DOI: 10.1007/s11528-020-00570-9] [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] [Subscribe] [Scholar Register] [Accepted: 12/17/2020] [Indexed: 06/12/2023]
Abstract
With the integration of technology in teaching and learning, online learning is not a new instructional strategy in the education landscape. However, the onset of the Covid-19 pandemic has necessitated the implementation of Home-based Learning (HBL) for educators, parents, and students on an unprecedented duration and scale. The notions and the factors associated with the implementation of HBL are yet fully investigated. As such, this study aims to shed light on the prerequisites needed for implementing HBL and suggest its future research direction. The methodology involves a systematic review of the existing studies on ICT-supported formal learning outside the classroom and to identify the prerequisites of HBL from various perspectives of the students, teachers, and parents. By doing so, this report will provide a deeper understanding of the multiple components of HBL and how it is to be taken into consideration when implementing HBL from both the theoretical and practical standpoint.
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Affiliation(s)
- Yun Wen
- National Institute of Education, Nanyang Technological University, Singapore, Singapore
| | | | - Sin Yee Lau
- National Institute of Education, Nanyang Technological University, Singapore, Singapore
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19
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Lee NY, Joung HC, Kim BK, Kim BY, Park TS, Suk KT. Lactobacillus lactis CKDB001 ameliorate progression of nonalcoholic fatty liver disease through of gut microbiome: addendum. Gut Microbes 2020; 12:1829449. [PMID: 33131411 PMCID: PMC7644178 DOI: 10.1080/19490976.2020.1829449] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
According to our recent study (N.Y. LEE et al. Gut Microbes 2020; 11:882-99.)1, we reported that Lactobacillus and Pediococcus ameliorate progression of nonalcoholic fatty liver disease through modulation of the gut microbiome. According on the analysis method (Previous: 16s rRNA sequencing and Recent: whole gene sequencing), the probiotics named Lactobacillus bulgaricus that we used in the experiment was identified as Lactobacillus delbrueckii subsp. bulgaricus through 16s rRNA sequencing analysis. Recently, we performed a clearer analysis with whole gene sequencing to proceed with the clinical trial, it was identified as Lactobacillus delbrueckii subsp. lactis by whole gene sequencing. Therefore, we inform that the subspecies have been changed to lactis through WGS. Read L. bulgaricus in the previous paper as L. lactis. In this addendum, the results of the change to L. lactis are summarized, and descriptions have been added to Materials & methods and Discussion.
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Affiliation(s)
- Na Young Lee
- Institue for Liver and Digestive Disease, Hallym University, Chuncheon-si, Republic of Korea
| | - Hyun Chae Joung
- Chong Kun Dang Bio Research Institute, CKDBiO, Ansan-si, Republic of Korea
| | - Byoung Kook Kim
- Chong Kun Dang Bio Research Institute, CKDBiO, Ansan-si, Republic of Korea
| | - Byung Yong Kim
- ChunLab, Inc., Microbiome Department, Seoul, Republic of Korea
| | - Tae Sik Park
- Department of Life Science, Gachon University, Sungnam, Republic of Korea
| | - Ki Tae Suk
- Institue for Liver and Digestive Disease, Hallym University, Chuncheon-si, Republic of Korea,Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Republic of Korea,CONTACT Ki Tae Suk Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Gyo-dong, Chuncheon24253, South Korea
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20
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Lee SJ, Han YL, Park SJ, Park JW. Optimal generation number in magnetic-cored dendrimers as Pb(II) and Cd(II) adsorbents. Environ Technol 2020; 41:3412-3419. [PMID: 31074332 DOI: 10.1080/09593330.2019.1611935] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 04/18/2019] [Indexed: 06/09/2023]
Abstract
As the generation number of dendrimers increases, more organic branches and terminal groups are synthesized on the surface. However, this may not be actual situations in all generations of dendrimers. Different generations of magnetic cored dendrimer (MCD) terminalized with amine functional groups were compared as adsorbents for heavy metal ions in water. To determine the optimal generation number as adsorbent, the maximal adsorption of lead and cadmium on generation 1, 2, and 3 (G1, G2, and G3) MCDs. Higher generation MCD had more organic contents and possibly terminal groups on its structure. However, G2 MCD was the highest in adsorbing both lead and cadmium. An acid-base titration was performed to quantify the amine functional groups. The active amine sites on G2 are 4.35 times as much as that of G1 and 0.12 times as much as that of G3, which coincided with the adsorption experimental result. Incomplete dendritic structure formation due to steric hindrance caused G2 MCD to be the most efficient among the three generations of MCDs in this research.
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Affiliation(s)
- Soo-Jin Lee
- Department of Civil and Environmental Engineering, Hanyang University, Seoul, South Korea
| | - Ye-Lim Han
- Department of Civil and Environmental Engineering, Hanyang University, Seoul, South Korea
| | - Sung Jik Park
- Department of Civil and Environmental Engineering, Hanyang University, Seoul, South Korea
| | - Jae-Woo Park
- Department of Civil and Environmental Engineering, Hanyang University, Seoul, South Korea
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21
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Kim CZ, Lee SJ. Increased myofiber size and reduced satellite cell numbers in medial rectus muscle of patients with intermittent exotropia. Strabismus 2020; 28:201-207. [PMID: 33085552 DOI: 10.1080/09273972.2020.1832546] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE To elucidate the differences in muscle bundle and satellite cells in medial rectus muscle through histological and Immunofluorescence studies of intermittent exotropia patients and normal controls. Materials and Methods: From January 2015 to December 2017, 15 patients who underwent medial rectus resection surgery at Kosin University Gospel Hospital were enrolled. Four medial recti muscles collected from two brain-dead men without strabismus were used as controls and compared with the intermittent exotropia group. Hematoxylin and eosin (HE) staining were performed, and all muscle bundle diameters were measured with the Image J program and compared to the mean value. Immunological staining for MyoHC (Myosin Heavy Chain), PAX7 (Transcription Factor), and PCNA (Proliferating Cell Nuclear Antigen) were performed to analyze the distribution of myocytes and PAX7-positive and PCNA-positive cells. Results: The mean ages of the strabismus and control groups were 17.33 ± 13.05 and 22.0 ± 5.85 years, respectively, and the male to female ratio was 7:2 and 2:0. The average angle of deviation in the exotropia patients was 36.0 ± 16.83 prism diopters. The mean muscle bundle diameter under light microscopy was 60.21 ± 1.48 in the exotropia group and 52.27 ± 0.74 in the control group. The exotropia group showed significantly greater mean muscle bundle diameter (p < .001) and diameter regularity than the control group. The PAX7(+)/muscle bundle number ratio was 0.016 ± 0.014 and 0.056 ± 0.015 in the exotropia group and control group, respectively (p < .001), and the PCNA(+)/muscular bundle number ratio was 0.015 ± 0.017 and 0.182 ± 0.102 (p < .001). Both were significantly higher in the control group compared to that in the exotropia patients. Conclusion: In the exotropia group, mean diameter of medial rectus muscle bundle was significantly larger than that of control group. The ratios of PAX7 and PCNA to muscle bundle number were significantly higher in the control group than intermittent extropia group. We found the negative relationship between activation of satellite cells and muscle bundle diameter, and it might take one step forward to elucidate the pathogenesis of intermittent extropia.
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Affiliation(s)
- Chang Zoo Kim
- Department of Ophthalmology, College of Medicine, Kosin University, Gospel Hospital , Busan
| | - Sang Joon Lee
- Department of Ophthalmology, College of Medicine, Kosin University, Gospel Hospital , Busan
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22
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Abstract
Objectives: Parkinson's disease (PD) is a complex neurodegenerative disorder with a broad list of motor and non-motor symptoms (NMS) that has been shown to affect the relationship quality (mutuality) and caregiver burden. However, little is known if the effect of motor and NMS on caregiver burden is mediated by mutuality. Therefore, the aim of this study was to explore if perceived mutuality by patients and partners mediates the effect of motor and NMS on caregiver burden.Methods: Data were collected from 51 dyads with one PD patient, including measures of motor signs, NMS, impaired cognition, patients' and partners' perceived mutuality, caregiver burden and dependency in activities in daily life (ADL). Structural equation model with manifest variables were applied to explore if patients' and partners' mutuality score mediated the effect of motor signs, NMS, ADL or impaired cognition on caregiver burden.Result: Our results suggest that having a partner with PD who is dependent in ADL or has impaired cognition decreases partners' mutuality which leads to elevated burden. Motor symptoms or other NMS were not associated with partners' mutuality or caregiver burden. Instead, increasing severity of motor symptoms decrease patients' mutuality in turn leading to lower level of partners' mutuality.Conclusion: Our findings enhance the understanding of the complexity of living with PD for the partner and suggest that clinical assessment should include evaluation of how PD symptoms influence the quality of the relationship between partners and patients.
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Affiliation(s)
- Michaela Karlstedt
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | | | - Dag Aarsland
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Johan Lökk
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
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23
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Ashida N, Ida K, Koide Y, Vavricka CJ, Izumi M, Kiyota H. Synthesis of the oxazolidinone fragment of thelepamide. Nat Prod Res 2020; 36:1686-1692. [PMID: 32865028 DOI: 10.1080/14786419.2020.1809398] [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] [Indexed: 10/23/2022]
Abstract
Thelepamide, an unique ketide-amino acid isolated from a marine annelid worm Thelepus crispus, has a unique oxazolidinone ring derived from cysteine, glycine and valine. Rareness in nature as well as promising bioactive possibility make the oxazolidinone ring an attractive synthetic target. The hydroxy oxazolidinone fragment of thelepamide was prepared by acid-catalysed N,O-acetal formation between a ketoamide and formaldehyde. Lactone-carbonyl selective isopropyl addition to an oxazilidine-dione under Grignard conditions also forms the target compound.
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Affiliation(s)
- Naoki Ashida
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Kousuke Ida
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Yumi Koide
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | | | - Minoru Izumi
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
| | - Hiromasa Kiyota
- Graduate School of Environmental and Life Science, Okayama University, Okayama, Japan
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24
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Etani R, Ojima M, Ariyoshi K, Fujishima Y, Kai M. Cellular kinetics of hematopoietic cells with Sfpi1 deletion are present at different frequencies in bone-marrow and spleen in X-irradiated mice. Int J Radiat Biol 2020; 96:1119-1124. [PMID: 32658559 DOI: 10.1080/09553002.2020.1793018] [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] [Indexed: 10/23/2022]
Abstract
PURPOSE Several past studies using a mouse model of radiation-induced AML (rAML) have shown that hemizygous deletion of the Sfpi1 gene (HDSG) is an initiating event for the development of rAML. In this study, we examined the difference in frequency of HDSG in hematopoietic stem cells (HSCs) Rich hematopoietic Cell population (HRCs) from bone marrow (BM) and spleen of C3H mice irradiated with 3 Gy X-rays. MATERIALS AND METHODS 8-weeks old male C3H mice were irradiated 3Gy of whole body X-ray (1 Gy/min) and mice were sacrificed at 1, 4, 8, and 26 weeks. Then, HSPCs were isolated from BM of femur and spleen, the frequency of HRCs with Sfpi1 gene deletion was analyzed by fluorescence in situ hybridization (FISH). RESULTS AND CONCLUSIONS The frequency of HRCs with HDSG in both BM and spleen was increased 1 week after X-irradiation. Then, the frequency of HRCs with HDSG in BM showed a gradual decrease from 4 to 26 weeks, whereas HRCs with HDSG in spleen remained high, even at 26 weeks after X-irradiation. HDSG is less likely to be eliminated, particularly in the spleen, after X-irradiation. The spleen as well as BM of the femur may be major sites of rAML development.
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Affiliation(s)
- Reo Etani
- Laboratory of Environmental Health Science, Oita University of Nursing and Health Sciences, Oita City, Japan
| | - Mitsuaki Ojima
- Laboratory of Environmental Health Science, Oita University of Nursing and Health Sciences, Oita City, Japan
| | - Kentaro Ariyoshi
- Institute of Radiation Emergency Medicine, Hirosaki University, Hirosaki City, Japan.,Integrated Center for Science and Humanities, Fukushima Medical University, Fukushima City, Japan
| | - Yohei Fujishima
- Institute of Radiation Emergency Medicine, Hirosaki University, Hirosaki City, Japan.,Department of Radiation Biology, Tohoku University Grauduate School of Medicine, Sendai City, Japan
| | - Michiaki Kai
- Laboratory of Environmental Health Science, Oita University of Nursing and Health Sciences, Oita City, Japan
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25
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Jeong H, Hwang S, Kwon H. Survey for acrylamide in processed foods from Korean market and individual exposure estimation using a non-parametric probabilistic model. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2020; 37:916-930. [PMID: 32310016 DOI: 10.1080/19440049.2020.1746410] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 10/24/2022]
Abstract
Acrylamide, a known carcinogen, is formed during preparation of food containing reducing sugar and asparagine. Because acrylamide exposure of the population is primarily through food, the maximum levels of acrylamide in food were set by the European Commission in 2017. Moreover, in the 2016 Korean Total Diet study, acrylamide showed the lowest margin of exposure among 23 food-processing-related chemicals, necessitating risk reduction options. Therefore, the objective of this study was to determine the variation of acrylamide content in different food items and identify the food categories, to provide options for risk management. Acrylamide was analysed using high-performance liquid chromatography coupled with tandem mass spectrometry in more than 1,000 processed food items. To estimate acrylamide exposure, the analytical data obtained herein and the food consumption data of Korean National Health and Nutrition Examination Survey from 2013 to 2017 were used. A non-parametric technique of a probabilistic model was used for exposure estimation. Confectioneries (here this category includes potato and similar savoury snacks) contained a wide range of acrylamide content. Particularly, the highest acrylamide content was detected in a tea made of Jerusalem artichoke. The presence of acrylamide in turmeric along with the Jerusalem artichoke was reported in this study for the first time. The main contributors of dietary acrylamide exposure were confectioneries for youths aged 3-18 years and coffee for adults aged 19-80 years. Therefore, risk management in confectionery and coffee could help reduce acrylamide exposure for Koreans. In addition, the mitigation strategies for food containing high acrylamide content, such as Jerusalem artichoke tea, are needed to reduce acrylamide exposure to loyal consumers.
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Affiliation(s)
- Hyojin Jeong
- Department of Food and Nutrition, Seoul National University , Seoul, Korea
| | - Soomee Hwang
- Department of Food and Nutrition, Seoul National University , Seoul, Korea
| | - Hoonjeong Kwon
- Department of Food and Nutrition, Seoul National University , Seoul, Korea.,Research Institute of Human Ecology, Seoul National University , Seoul, Korea
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26
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Aleksandrov AA, Memetova KS, Stankevich LN, Knyazeva VM, Shtyrov Y. Referent's Lexical Frequency Predicts Mismatch Negativity Responses to New Words Following Semantic Training. J Psycholinguist Res 2020; 49:187-198. [PMID: 31745824 DOI: 10.1007/s10936-019-09678-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Lexical ERPs (event-related potentials) obtained in an oddball paradigm were suggested to be an index of the formation of new word representations in the brain in the learning process: with increased exposure to new lexemes, the ERP amplitude grows, which is interpreted as a signature of a new memory-trace build-up and activation. Previous learning studies using this approach have, however, mostly used meaningless novel word forms; it therefore remains uncertain whether the increased amplitude simply reflects increased familiarity with the new stimulus or is indeed a reflection of a complete word representation. Here, we used the oddball paradigm to measure the mismatch negativity (MMN) responses to novel word forms before and after semantic training, during which they were associated with previously familiar words of either high or low frequency of occurrence. Following training, the amplitude of the MMN to novel words was enhanced. Furthermore, these changes were dependent on the frequency of the reference which novel items became associated with: namely, the MMN amplitude became greater and the latency shorter for the item which was assigned the high-frequency meaning. Even though the amount of training was the same for both types of items, the low-frequency stimulus did not achieve similar significant changes. Our results suggest that the new surface form becomes linked to the existing representation, which then automatically activates in full when the respective stimulus is present at the input. This finding indicates that the learning-related MMN dynamics, manifest as a response increase after learning, likely reflects the formation and activation of a complete lexicosemantic memory circuits for words.
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Affiliation(s)
- Aleksander A Aleksandrov
- Laboratory of Behavioural Neurodynamics, Saint Petersburg State University, Saint Petersburg, Russia
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Kristina S Memetova
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
- Kurchatov Institute - National Research Centre, Moscow, Russia
| | - Lyudmila N Stankevich
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Veronika M Knyazeva
- Laboratory of Behavioural Neurodynamics, Saint Petersburg State University, Saint Petersburg, Russia
- Department of Higher Nervous Activity and Psychophysiology, Saint Petersburg State University, Saint Petersburg, Russia
| | - Yury Shtyrov
- Centre of Functionally Integrative Neuroscience (CFIN), Aarhus University/Aarhus University Hospital, Nørrebrogade 44, bld 1A, 8000, Aarhus C, Denmark.
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Sugi S, Nunome H, Tamura Y, Iga T, Lake M. Contribution of lower body segment rotations in various height soccer volley kicking. Sports Biomech 2019; 21:669-684. [PMID: 31762385 DOI: 10.1080/14763141.2019.1667422] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We aimed to quantify the contribution of lower body segment rotations in producing foot velocity during the soccer volley kick. Fifteen male experienced university players kicked a soccer ball placed at four height conditions (0, 25, 50 and 75 cm). Their kicking motion was captured at 500 Hz. The effectiveness of lower body segment rotations in producing forward (Ffv) and upward (Fuv) foot velocity were computed and time integrated. Major contributors for Ffv were a) left hip linear velocity, b) knee extension and c) pelvis retroflexion (the pitch rotation). The contribution of a) become smaller as the ball height increased while those of b) and c) did not change significantly. Moreover, the pelvis clockwise rotation (the yaw rotation) showed apparent contribution only for volley kicking (except 0 cm height). Major contributors for Fuv were 1) knee flexion, 2) hip internal rotation, 3) pelvis clockwise rotation (the roll rotation) and 4) hip flexion. The contributions of 1) and 4) become consistently smaller as the ball height increased, while those of 2) and 3) become larger systematically. Soccer volley kicking was found to have unique adaptations of segmental contributions to achieve higher foot position while maintain foot forward velocity.
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Affiliation(s)
- Shusei Sugi
- Graduate School of Sports and Health Science, Fukuoka University, Fukuoka, Japan
| | - Hiroyuki Nunome
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
| | - Yuji Tamura
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
| | - Takahito Iga
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan
| | - Mark Lake
- School of Sports and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
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Takeda K, Yanagi S. Mitochondrial retrograde signaling to the endoplasmic-reticulum regulates unfolded protein responses. Mol Cell Oncol 2019; 6:e1659078. [PMID: 31692879 PMCID: PMC6816402 DOI: 10.1080/23723556.2019.1659078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 08/19/2019] [Revised: 08/20/2019] [Accepted: 08/20/2019] [Indexed: 10/28/2022]
Abstract
Unfolded protein response (UPRs) directs adaption or apoptosis depending on the severity of endoplasmic-reticulum (ER) stress. We found that apoptotic signaling by inositol requiring enzyme 1α (IRE1α), a transducer of UPRs, is suppressed by mitochondrial ubiquitin ligase MITOL/MARCH5 on ER-mitochondria contacts, suggesting that mitochondria regulate cell fate under ER stress.
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Affiliation(s)
- Keisuke Takeda
- Laboratory of Molecular Biochemistry, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Shigeru Yanagi
- Laboratory of Molecular Biochemistry, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
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Ishikawa Y, Okamoto N, Yoneyama Y, Maeda N, Kamikouchi A. A single male auditory response test to quantify auditory behavioral responses in Drosophila melanogaster. J Neurogenet 2019; 33:64-74. [PMID: 31106644 DOI: 10.1080/01677063.2019.1611805] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 12/21/2022]
Abstract
Many animals utilize auditory signals to communicate with conspecific individuals. During courtship, males of the fruit fly Drosophila melanogaster and related species produce a courtship song comprised of sine and pulse songs by vibrating their wings. The pulse song increases female receptivity and male courtship activity, indicating that it functions as a sexual signal. One song parameter, interpulse interval (IPI), varies among closely related species. In D. melanogaster, a song with a conspecific IPI induces a stronger behavioral response than heterospecific songs, indicating the ability of the flies to discriminate conspecific IPI. Traditionally, the fly's response to the song is measured under grouped conditions, in which the effect of sensory modalities other than audition cannot be excluded. Here, to quantify the individual ability to discriminate a conspecific song, we systematically analyzed the auditory response of single male flies to sound with various parameters. Moreover, we applied this method, termed SMART (Single Male Auditory Response Test), to two sister species for potential application in a comparative approach. By quantifying the locomotor activity of single D. melanogaster males during sound exposure, we detected increased locomotor activity in response to pulse songs, but not to white noise or pure tone. The conspecific song evoked stronger response than the heterospecific songs, and ablation of their antennal receivers severely suppressed the locomotor increase. A pulse song with a small IPI variation evoked a continuous response, while the response to songs with highly variable IPIs tends to be rapidly decayed. This provides the first evidence that fruit flies discriminate IPI variations, which possibly inform the age and social contexts of the singer. Sister species, D. sechellia, exhibited a locomotor response to pulse song, while D. simulans exhibited no behavioral response. This suggests that auditory and other stimuli that elicit this behavioral response are diversified among Drosophila species.
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Affiliation(s)
- Yuki Ishikawa
- a Graduate School of Science, Nagoya University , Nagoya , Japan
| | - Natsuki Okamoto
- a Graduate School of Science, Nagoya University , Nagoya , Japan
| | - Yusuke Yoneyama
- a Graduate School of Science, Nagoya University , Nagoya , Japan
| | - Naoki Maeda
- a Graduate School of Science, Nagoya University , Nagoya , Japan
| | - Azusa Kamikouchi
- a Graduate School of Science, Nagoya University , Nagoya , Japan
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Incerti PV, Ching TY, Cowan R. The effect of cross-over frequency on binaural hearing performance of adults using electric-acoustic stimulation. Cochlear Implants Int 2019; 20:190-206. [PMID: 30880646 DOI: 10.1080/14670100.2019.1590499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 10/27/2022]
Abstract
Objective: To investigate the effect of varying cross-over frequency (CF) settings for electric-acoustic (EA) stimulation in one ear combined with acoustic (A) hearing in the opposite ear on binaural speech perception, localization and functional performance in real life. Methods: Performance with three different CF settings set according to audiometric-based criterion were compared, following a four week familiarisation period with each, in ten adult cochlear implant recipients with residual hearing in both ears. On completion of all trials participants selected their preferred CF setting. Results: On average, CF settings did not have a significant effect on performance scores. However, higher ratings on device usage were associated with the preferred CF settings. Conclusion: Individuals who use EA + A stimulation may benefit from access to different CF settings to achieve maximal device usage.
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Affiliation(s)
- Paola V Incerti
- a National Acoustic Laboratories , Australian Hearing , Sydney , NSW 2109 , Australia.,b The Hearing CRC , Melbourne , Australia.,c Department of Audiology and Speech Pathology , The University of Melbourne , Melbourne , Australia
| | - Teresa Yc Ching
- a National Acoustic Laboratories , Australian Hearing , Sydney , NSW 2109 , Australia.,b The Hearing CRC , Melbourne , Australia
| | - Robert Cowan
- b The Hearing CRC , Melbourne , Australia.,c Department of Audiology and Speech Pathology , The University of Melbourne , Melbourne , Australia
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Lai YJ, Hsu KD, Huang TJ, Hsieh CW, Chan YH, Cheng KC. Anti-Melanogenic Effect from Submerged Mycelial Cultures of Ganoderma weberianum. Mycobiology 2019; 47:112-119. [PMID: 30988994 PMCID: PMC6450578 DOI: 10.1080/12298093.2019.1568680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 12/25/2018] [Accepted: 01/02/2019] [Indexed: 06/09/2023]
Abstract
Compounds from Lingzhi has been demonstrated the ability for inhibiting tyrosinase (a key enzyme in melanogenesis) activity. In this study, we investigated the anti-melanogenic activity from the submerged mycelial culture of Ganoderma weberianum and elucidated the skin lightening mechanism by B16-F10 murine melanoma cells. From the cellular context, several fractionated mycelium samples exhibited anti-melanogenic activity by reducing more than 40% extracellular melanin content of B16-F10 melanoma cells. In particular, the fractionated chloroform extract (CF-F3) inhibited both secreted and intracellular melanin with the lowest dosage (25 ppm). Further analysis demonstrated that CF-F3 inhibited cellular tyrosinase activity without altering its protein expression. Taken together, our study has demonstrated that the chemical extracts from submerged mycelial culture of G. weberianum have the potential to serve as an alternative anti-melanogenic agent.
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Affiliation(s)
- Ying-Jang Lai
- Department of Food Science, National Quemoy University, Kinmen, Taiwan
| | - Kai-Di Hsu
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Tzu-Jung Huang
- Graduate Institute of Food Science Technology, National Taiwan University, Taipei, Taiwan
| | - Chang-Wei Hsieh
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung, Taiwan
| | - Yu-Hin Chan
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
| | - Kuan-Chen Cheng
- Institute of Biotechnology, National Taiwan University, Taipei, Taiwan
- Graduate Institute of Food Science Technology, National Taiwan University, Taipei, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
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Shuang L, Deyun C, Zhifeng C, Ming P. Multi-feature fusion method for medical image retrieval using wavelet and bag-of-features. Comput Assist Surg (Abingdon) 2019; 24:72-80. [PMID: 30689441 DOI: 10.1080/24699322.2018.1560087] [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] [Indexed: 10/27/2022] Open
Abstract
Color, texture, and shape are the common features used for the retrieval systems. However, many medical images have a spot of color information. Therefore, the discriminative texture and shape features should be extracted to obtain a satisfied retrieval result. In order to increase the credibility of the retrieval process, many features can be combined to be used for medical image retrieval. Meanwhile, more features require more processing time, which will decrease the retrieval speed. In this paper, wavelet decomposition is adopted to generate different resolution images. Bag-of-feature, texture, and LBP feature are extracted from three different-level wavelet images. Finally, the similarity measure function is obtained by fusing these three types of features. Experimental results show that the proposed multi-feature fusion method can achieve a higher retrieval accuracy with an acceptable retrieval time.
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Affiliation(s)
- Liu Shuang
- Center for Post-Doctoral Studies of Computer Science and Technology, Harbin University of Science and Technology , Harbin , Heilongjiang , China.,College of Computer and Information Engineering, Harbin University of Commerce , Harbin , Heilongjiang , China
| | - Chen Deyun
- Center for Post-Doctoral Studies of Computer Science and Technology, Harbin University of Science and Technology , Harbin , Heilongjiang , China
| | - Chen Zhifeng
- College of Energy and Architectural Engineering, Harbin University of Commerce , Harbin , Heilongjiang , China
| | - Pang Ming
- College of Automation, Harbin Engineering University , Harbin , Heilongjiang , China
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Key AP, Jones D, Peters S. Spoken word processing in Rett syndrome: Evidence from event-related potentials. Int J Dev Neurosci 2019; 73:26-31. [PMID: 30630072 DOI: 10.1016/j.ijdevneu.2019.01.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 11/21/2018] [Revised: 12/18/2018] [Accepted: 01/04/2019] [Indexed: 12/18/2022] Open
Abstract
This study examined the feasibility of using auditory event-related potentials to evaluate spoken word processing during passive listening in girls with Rett syndrome (n = 11) and typical peers (n = 33), age 4-12 years. The typical group demonstrated the expected pattern of more negative amplitudes within 200-500 ms in response to words than nonwords at left temporal sites. In participants with Rett syndrome, word-nonword differentiation was observed at the right temporal sites. More negative left hemisphere amplitudes in response to words were associated (at trend level) with better receptive language skills and more adaptive behavior. The results indicate that girls with Rett syndrome differentiate known words from novel nonwords, but may do so using potentially atypical neural processes. Brain-behavior correlations support validity of the proposed neural markers of word processing, making passive listening paradigms a promising approach for assessing speech and language processing in participants with limited spoken language skills.
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Affiliation(s)
- Alexandra P Key
- Vanderbilt Kennedy Center for Research on Human Development, Nashville, TN 37203, United States; Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, United States; Department of Psychiatry and Behavioral Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, United States.
| | - Dorita Jones
- Vanderbilt Kennedy Center for Research on Human Development, Nashville, TN 37203, United States.
| | - Sarika Peters
- Vanderbilt Kennedy Center for Research on Human Development, Nashville, TN 37203, United States; Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN, 37232, United States.
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Hashemzadeh S, Ramezani F, Rafii-Tabar H. Study of Molecular Mechanism of the Interaction Between MEK1/2 and Trametinib with Docking and Molecular Dynamic Simulation. Interdiscip Sci 2019; 11:115-24. [PMID: 30465279 DOI: 10.1007/s12539-018-0305-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 07/16/2018] [Accepted: 08/31/2018] [Indexed: 10/27/2022]
Abstract
Trametinib was endorsed by the FDA in 2013 as a single agent for adult melanoma patients. Trametinib inhibits cell growth and proliferation in multiple tumor xenografts by preventing RAF phosphorylation of MEK and thus restricting accumulation of activated MEK. In this study, the focus of investigation was the mechanism of the interaction between trametinib and MEK1/2 via computational simulation. To specify the best interaction site of inhibitor with MEK1/2 based on the interaction energy ranking, first we performed a docking and then we studied the interactions of the ATP-bound MEK with trametinib, with RAF and the complex of the ATP-bound MEK-trametinib with RAF via molecular dynamic simulations. The results showed that trametinib inactivates the enzyme by bonding to a group of amino acids including Lys97/101, SER218/216, Asp208/212, and Met143/147 in MEK1/2. By bonding to the essential amino acids, trametinib inhibits the activity of the enzyme. All in all, the acquired results can be of great use in designing new inhibitors.
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Ryan J, Woods RL, Britt C, Murray AM, Shah RC, Reid CM, Kirpach B, Wolfe RS, Nelson MR, Lockery JE, Orchard SG, Trevaks RE, McNeil JJ, Storey E. Normative performance of healthy older individuals on the Modified Mini-Mental State (3MS) examination according to ethno-racial group, gender, age, and education level. Clin Neuropsychol 2018; 33:779-797. [PMID: 29976121 DOI: 10.1080/13854046.2018.1488996] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [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: 10/28/2022]
Abstract
OBJECTIVE To present normative performance data on the Modified Mini-Mental State (3MS) examination for healthy community-dwelling older individuals according to gender, age, education level, and ethno-racial group. METHOD More than 19,000 generally healthy older men and women without a diagnosis of dementia were recruited from the general population in Australia and the U.S. for the ASPirin in Reducing Events in the Elderly (ASPREE) study. The 3MS exam was administered as part of the baseline screening and individuals scoring above 77 were eligible to participate. RESULTS The sample comprised 16,360 Australian whites, 1080 U.S. whites, 895 African-Americans and 316 Hispanic/Latinos. The median age of participants was 74 years (range 65-98), with an average of 12 years of education and 56% were female. Increasing age and fewer years of completed education were associated with lower scores on the 3MS. Women scored higher than men in most age and education categories. Differences across ethno-racial groups were found. With factor analysis, four factors were identified which accounted for 35% of the between-person variance in 3MS scores for white Australians. CONCLUSIONS This large cohort of older individuals provides some of the most comprehensive 3MS normative data to be generated for whites (Australian and U.S.), Hispanic/Latinos and African-Americans, by age, gender, and educational attainment. These findings will serve as important reference standards for monitoring cognitive function in generally healthy older individuals, becoming increasingly important as this fraction of the population increases.
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Affiliation(s)
- Joanne Ryan
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - Robyn L Woods
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - Carlene Britt
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - Anne M Murray
- b Berman Center for Outcomes and Clinical Research, Minneapolis Medical Research Foundation , Hennepin County Medical Center , Minneapolis , MN , USA.,c Division of Geriatrics, Department of Medicine , Hennepin County Medical Center and University of Minnesota , Minneapolis , MN , USA
| | - Raj C Shah
- d Department of Family Medicine and Rush Alzheimer's Disease Center , Rush University Medical Center , Chicago , IL , USA
| | - Christopher M Reid
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia.,e School of Public Health , Curtin University , Perth , Australia
| | - Brenda Kirpach
- b Berman Center for Outcomes and Clinical Research, Minneapolis Medical Research Foundation , Hennepin County Medical Center , Minneapolis , MN , USA
| | - Rory S Wolfe
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - Mark R Nelson
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia.,f Menzies Institute for Medical Research , University of Tasmania , Hobart , Australia
| | - Jessica E Lockery
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - Suzanne G Orchard
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - Ruth E Trevaks
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - John J McNeil
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
| | - Elsdon Storey
- a Department of Epidemiology and Preventive Medicine , Monash University , Melbourne , Australia
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Abstract
1. A novel method utilizing an internal standard in hepatocytes incubations has been developed and demonstrated to decrease the variability in the determination of intrinsic clearance (CLint) in this system. The reduced variability was shown to allow differentiation of lower elimination rate constants from noise. 2. The suggested method was able to compensate for a small but systematic error (0.5 µL/min/106 cells) caused by an evaporation of approximately 15% of the volume during the incubation time. 3. The approach was validated using six commercial drugs (ketoprofen, tolbutamide, phenacetin, etodolac and quinidine) which were metabolized by different pathways. 4. The suggested internal standard, MSC1815677, was extensively characterized and the acquired data suggest that it fulfills the requirements of an internal standard present during the incubation. The proposed internal standard was stable during the incubation and showed a low potential to inhibit drug metabolizing enzymes and transporters. With MSC1815677 we propose a novel simple, robust and cost-effective method to address the challenges in the estimation of low clearance in hepatocyte incubations.
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Affiliation(s)
- Ugo Zanelli
- a Global Early Development/Quantitative Pharmacology and Drug Disposition (QPD) , Biopharma, Merck , Darmstadt , Germany
| | - Thomas Michna
- a Global Early Development/Quantitative Pharmacology and Drug Disposition (QPD) , Biopharma, Merck , Darmstadt , Germany
| | - Carl Petersson
- a Global Early Development/Quantitative Pharmacology and Drug Disposition (QPD) , Biopharma, Merck , Darmstadt , Germany
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Takahashi Y, Araie Y, Nomura D, Takahashi Y, Sano K, Saji H, Takakura Y, Nishikawa M. Construction of nanostructured DNA harbouring phosphorodiamidate morpholino oligonucleotide for controlled tissue distribution in mice. J Drug Target 2017; 26:373-381. [PMID: 28972806 DOI: 10.1080/1061186x.2017.1387789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Phosphorodiamidate morpholino oligonucleotides (PMOs) are a class of antisense oligonucleotides used in the treatment of neuromuscular diseases. Their major drawbacks are high blood clearance and poor cellular delivery. Previously, we demonstrated that tripod-like nanostructured DNA, or tripodna, was efficiently taken up by macrophages and dendritic cells. In this study, we used iodine-125(125I)-labelled PMOs, designed a tripodna harbouring an 125I-PMO (125I-PMO/tripodna), and evaluated whether this tripodna could control the pharmacokinetic properties of PMO. Gel electrophoresis showed that 125I-PMO was almost completely incorporated into the tripodna. Compared to 125I-PMO, 125I-PMO/tripodna was more efficiently taken up by macrophage-like RAW264.7 cells. Moreover, after intravenous injection into mice, the area under the plasma concentration-time curve of 125I-PMO/tripodna was significantly larger than that of 125I-PMO. The distribution of 125I-PMO/tripodna in the liver and spleen at 24 h was 32- and 51-fold higher than that of 125I-PMO, respectively. The fractionation of liver cells revealed that non-parenchymal cells were the major cells contributing to the hepatic uptake of 125I-PMO/tripodna. These results indicate that tripodna has the potential to deliver PMO, particularly to the liver and spleen.
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Affiliation(s)
- Yosuke Takahashi
- a Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan
| | - Yuki Araie
- a Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan
| | - Daiki Nomura
- a Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan
| | - Yuki Takahashi
- a Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan
| | - Kohei Sano
- b Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan
| | - Hideo Saji
- b Department of Patho-Functional Bioanalysis, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan
| | - Yoshinobu Takakura
- a Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan
| | - Makiya Nishikawa
- a Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences , Kyoto University , Kyoto , Japan.,c Faculty of Pharmaceutical Sciences, Laboratory of Biopharmaceutics , Tokyo University of Science , Noda, Chiba , Japan
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Abstract
Glioblastoma is the most aggressive malignant brain tumor with poor prognosis. Radiomics is a newly emerging and promising technique to reveal the complex relationships between high-throughput medical image features and deep information of disease including pathology, biomarkers and genomics. An approach was developed to investigate the internal relationship between magnetic resonance imaging (MRI) features and the age-related origins of glioblastomas based on a quantitative radiomics method. A fully automatic image segmentation method was applied to segment the tumor regions from three dimensional MRI images. 555 features were then extracted from the image data. By analyzing large numbers of quantitative image features, some predictive and prognostic information could be obtained by the radiomics approach. 96 patients diagnosed with glioblastoma pathologically have been divided into two age groups (<45 and ≥45 years old). As expected, there are 101 features showing the consistency with the age groups (T test, p < .05), and unsupervised clustering results of those features also show coherence with the age difference (T test, p= .006). In conclusion, glioblastoma in different age groups present different radiomics-feature patterns with statistical significance, which indicates that glioblastoma in different age groups should have different pathologic, protein, or genic origins.
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Affiliation(s)
- Zeju Li
- a Department of Electronic Engineering , Fudan University , Shanghai , China
| | - Yuanyuan Wang
- a Department of Electronic Engineering , Fudan University , Shanghai , China.,b Key laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai , Shanghai , China
| | - Jinhua Yu
- a Department of Electronic Engineering , Fudan University , Shanghai , China.,b Key laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai , Shanghai , China
| | - Yi Guo
- a Department of Electronic Engineering , Fudan University , Shanghai , China.,b Key laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai , Shanghai , China
| | - Qi Zhang
- c School of Communication and Information Engineering, Institute of Biomedical Engineering , Shanghai University , Shanghai , China
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Abstract
Chronic lymphocytic leukemia (CLL) is a heterogeneous B cell malignancy that still remains incurable. Recent studies have highlighted cellular and non-cellular components of the tissue microenvironment in CLL that help nurture the growth of leukemic cells by providing the necessary stimuli for their proliferation and survival. The diverse stimuli in the specialized tissue microenvironment of CLL lead to constitutive activation of several signaling pathways that includes B cell receptor signaling and the associated mitogen-activated protein kinase (MAPK) signaling. Recent findings have described aberrant activation of MAPK signaling and its interactions with other cellular signaling pathways in the pathogenesis of CLL. These studies have shed light on the deregulated molecular mechanisms contributing to hyperactivation of MAPK signaling and provided avenues for therapeutic options for aggressive CLL. In this review, we describe and discuss the current status of our understanding into the role of MAPK signaling in the pathogenesis of CLL.
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Affiliation(s)
- Ashima Shukla
- a Sanford Burnham Prebys Medical Discovery Institute , La Jolla , CA , USA
| | - Vipul Shukla
- b La Jolla Institute for Allergy and Immunology , La Jolla , CA , USA
| | - Shantaram S Joshi
- c Department of Genetics Cell Biology and Anatomy , University of Nebraska Medical Centre , Omaha , NE , USA
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Gislason MK, Foster E, Bransby-Zachary M, Nash DH. Biomechanical analysis of the Universal 2 implant in total wrist arthroplasty: a finite element study. Comput Methods Biomech Biomed Engin 2017; 20:1113-1121. [PMID: 28580792 DOI: 10.1080/10255842.2017.1336548] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 10/19/2022]
Abstract
Little is known about the mechanics of in vivo loading on total wrist prostheses where many studies have looked at the mechanics of other types of arthroplasty such as for the hip and the knee which has contributed to the overall success of these types of procedures. Currently surgeons would prefer to carry out arthrodesis on the wrist rather than consider arthroplasty as clinical data have shown that the outcome of total wrist arthroplasty is poorer than compared to the hip and knee. More research is needed on the loading mechanisms of the implants in order to enhance the design of future generation implants. This study looks at the load transfer characteristics of the Universal 2 implant using a finite element model of a virtually implanted prosthesis during gripping. The results showed that the loading on the implant is higher on the dorsal and ulnar aspect than on the volar and radial aspect of the implant. The whole load is transmitted through the radius and none through the ulna.
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Affiliation(s)
- M K Gislason
- a Institute for Biomedical and Neural Engineering, School of Science and Engineering , University of Reykjavik , Reykjavik , Iceland.,b Faculty of Engineering, Department of Mechanical and Aerospace Engineering , University of Strathclyde , Glasgow , UK
| | - E Foster
- b Faculty of Engineering, Department of Mechanical and Aerospace Engineering , University of Strathclyde , Glasgow , UK
| | | | - D H Nash
- b Faculty of Engineering, Department of Mechanical and Aerospace Engineering , University of Strathclyde , Glasgow , UK
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Kaneko K, Saito H, Sasaki T, Sugawara S, Akasaka M, Kanaya T, Kubota I. Rosuvastatin prevents aortic arch plaque progression and improves prognosis in ischemic stroke patients. Neurol Res 2016; 39:133-141. [PMID: 27915586 DOI: 10.1080/01616412.2016.1263174] [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] [Indexed: 10/20/2022]
Abstract
OBJECTIVES Complicated aortic arch plaques (CAP) and their progression are important for recurrent ischemic stroke (IS) and its prognosis. We investigated the effects and clinical benefits of rosuvastatin therapy on this pathophysiology. The purpose of this study was to investigate whether rosuvastatin prevention of aortic arch plaque progression improved the prognosis of IS patients. METHODS Ninety-seven consecutive acute cerebral embolism patients were retrospectively surveyed. All had transesophageal echocardiography (TEE) to assess the presence or absence of CAP, defined as aortic wall thickness ≥4 mm or plaque ulceration. Patients received conventional antithrombotic therapy as clinically indicated. All patients with CAP were recommended to receive 5 mg rosuvastatin/day, administered by their attending physicians; not all physicians followed this recommendation. Six-month follow-up TEEs were performed in patients with CAP who received rosuvastatin. Major adverse cerebrovascular events (MACEs) comprised recurrent IS and death. RESULTS CAP was detected in 39 patients (40%), and MACEs in 15. Multivariate regression analysis showed that patients with CAP not taking rosuvastatin was an independent risk factor for MACEs (odds ratio = 18.044; 95% confidential interval = 2.089-155.846, p < 0.01). When patients were divided into three groups: those with CAP taking rosuvastatin, those with CAP not taking rosuvastatin, and those without CAP, Kaplan-Meier analysis demonstrated that patients with CAP not taking rosuvastatin had significantly more MACEs than those in the other two groups (long-rank test; χ2 = 6.553, p < 0.05). Six-month TEE follow-ups in the 26 patients with CAP taking rosuvastatin showed significant improvement in CAP diameter with improved lipid profiles; 88% (23/26 patients) showed no morphological CAP progression; 15 of these showed CAP regression. DISCUSSION Rosuvastatin therapy prevented aortic arch plaque progression in IS patients with CAP, and may also have long-term clinical benefits.
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Affiliation(s)
- Kazuyoshi Kaneko
- a Department of Cardiology , Kitamurayama Municipal Hospital , Higashine , Japan
| | - Hiroki Saito
- a Department of Cardiology , Kitamurayama Municipal Hospital , Higashine , Japan
| | - Toshiki Sasaki
- a Department of Cardiology , Kitamurayama Municipal Hospital , Higashine , Japan
| | - Shigeo Sugawara
- b Department of Cardiology , Nihonkai General Hospital , Sakata , Japan
| | - Masahiro Akasaka
- c Department of Neurosurgery , Nihonkai General Hospital , Sakata , Japan
| | - Tohru Kanaya
- a Department of Cardiology , Kitamurayama Municipal Hospital , Higashine , Japan
| | - Isao Kubota
- d Department of Cardiology, Pulmonology, and Nephrology , Yamagata University School of Medicine , Yamagata , Japan
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Hendrickson K, Walenski M, Friend M, Love T. The organization of words and environmental sounds in memory. Neuropsychologia 2015; 69:67-76. [PMID: 25624059 DOI: 10.1016/j.neuropsychologia.2015.01.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 08/05/2014] [Revised: 11/21/2014] [Accepted: 01/23/2015] [Indexed: 11/24/2022]
Abstract
In the present study we used event-related potentials to compare the organization of linguistic and meaningful nonlinguistic sounds in memory. We examined N400 amplitudes as adults viewed pictures presented with words or environmental sounds that matched the picture (Match), that shared semantic features with the expected match (Near Violation), and that shared relatively few semantic features with the expected match (Far Violation). Words demonstrated incremental N400 amplitudes based on featural similarity from 300-700ms, such that both Near and Far Violations exhibited significant N400 effects, however Far Violations exhibited greater N400 effects than Near Violations. For environmental sounds, Far Violations but not Near Violations elicited significant N400 effects, in both early (300-400ms) and late (500-700ms) time windows, though a graded pattern similar to that of words was seen in the mid-latency time window (400-500ms). These results indicate that the organization of words and environmental sounds in memory is differentially influenced by featural similarity, with a consistently fine-grained graded structure for words but not sounds.
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Affiliation(s)
- Kristi Hendrickson
- Center for Research in Language, University of California, San Diego, USA; School of Speech, Language, and Hearing Sciences, San Diego State University, USA; Joint Doctoral Program in Language and Communicative Disorders, San Diego State University, USA.
| | - Matthew Walenski
- School of Speech, Language, and Hearing Sciences, San Diego State University, USA.
| | | | - Tracy Love
- Center for Research in Language, University of California, San Diego, USA; School of Speech, Language, and Hearing Sciences, San Diego State University, USA.
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Yokoyama T, Noguchi Y, Koga H, Tachibana R, Saiki J, Kakigi R, Kita S. Multiple neural mechanisms for coloring words in synesthesia. Neuroimage 2014; 94:360-371. [PMID: 24486829 DOI: 10.1016/j.neuroimage.2014.01.039] [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: 09/12/2013] [Revised: 01/07/2014] [Accepted: 01/23/2014] [Indexed: 10/25/2022] Open
Abstract
Grapheme-color synesthesia is a phenomenon in which achromatic letters/digits automatically induce particular colors. When multiple letters are integrated into a word, some synesthetes perceive that all those letters are changed into the same color, reporting lexical color to that word. Previous psychological studies found several "rules" that determine those lexical colors. The colors to most words are determined by the first letters of the words, while some words in ordinal sequences have their specific colors. Recent studies further reported the third case where lexical colors might be influenced by semantic information of words. Although neural mechanisms determining those lexical colors remained unknown, here we identified three separate neural systems in the synesthete's brain underlying three rules for illusory coloring of words. In addition to the occipito-temporal and parietal regions previously found to be associated with the grapheme-color synesthesia, neural systems for lexical coloring extended to linguistic areas in the left inferior frontal and anterior temporal regions that were engaged in semantic analyses of words. Those results indicate an involvement of wider and higher neural networks than previously assumed in a production of synesthetic colors to visual stimuli and further showed a multiplicity of synesthetic mechanisms represented in the single brain.
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Affiliation(s)
- Takemasa Yokoyama
- Department of Psychology, Kobe University, Kobe, Japan; Japan Society for the Promotion of Science, Japan.
| | | | - Hiroki Koga
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | | | - Jun Saiki
- Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Ryusuke Kakigi
- Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki, Japan
| | - Shinichi Kita
- Department of Psychology, Kobe University, Kobe, Japan
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Kolich M. Using Failure Mode and Effects Analysis to design a comfortable automotive driver seat. Appl Ergon 2014; 45:1087-1096. [PMID: 24529532 DOI: 10.1016/j.apergo.2014.01.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 01/05/2012] [Revised: 11/19/2013] [Accepted: 01/19/2014] [Indexed: 06/03/2023]
Abstract
Given enough time and use, all designs will fail. There are no fail-free designs. This is especially true when it comes to automotive seating comfort where the characteristics and preferences of individual customers are many and varied. To address this problem, individuals charged with automotive seating comfort development have, traditionally, relied on iterative and, as a result, expensive build-test cycles. Cost pressures being placed on today's vehicle manufacturers have necessitated the search for more efficient alternatives. This contribution aims to fill this need by proposing the application of an analytical technique common to engineering circles (but new to seating comfort development), namely Design Failure Mode and Effects Analysis (DFMEA). An example is offered to describe how development teams can use this systematic and disciplined approach to highlight potential seating comfort failure modes, reduce their risk, and bring capable designs to life.
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Affiliation(s)
- Mike Kolich
- Ford Motor Company, Product Development Center, 20901 Oakwood Blvd, Dearborn, 48124 MI, USA.
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