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de Kort FA, Coenen M, Weaver NA, Kuijf HJ, Aben HP, Bae HJ, Bordet R, Cammà G, Chen CP, Dewenter A, Duering M, Fang R, van der Giessen RS, Hamilton OK, Hilal S, Huenges Wajer IM, Kan CN, Kim J, Kim BJ, Köhler S, de Kort PL, Koudstaal PJ, Lim JS, Lopes R, Mok VC, Staals J, Venketasubramanian N, Verhagen CM, Verhey FR, Wardlaw JM, Xu X, Yu KH, Biesbroek JM, Biessels GJ. White Matter Hyperintensity Volume and Poststroke Cognition: An Individual Patient Data Pooled Analysis of 9 Ischemic Stroke Cohort Studies. Stroke 2023; 54:3021-3029. [PMID: 37901947 PMCID: PMC10664782 DOI: 10.1161/strokeaha.123.044297] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/14/2023] [Accepted: 09/22/2023] [Indexed: 10/31/2023]
Abstract
BACKGROUND White matter hyperintensities (WMH) are associated with cognitive dysfunction after ischemic stroke. Yet, uncertainty remains about affected domains, the role of other preexisting brain injury, and infarct types in the relation between WMH burden and poststroke cognition. We aimed to disentangle these factors in a large sample of patients with ischemic stroke from different cohorts. METHODS We pooled and harmonized individual patient data (n=1568) from 9 cohorts, through the Meta VCI Map consortium (www.metavcimap.org). Included cohorts comprised patients with available magnetic resonance imaging and multidomain cognitive assessment <15 months poststroke. In this individual patient data meta-analysis, linear mixed models were used to determine the association between WMH volume and domain-specific cognitive functioning (Z scores; attention and executive functioning, processing speed, language and verbal memory) for the total sample and stratified by infarct type. Preexisting brain injury was accounted for in the multivariable models and all analyses were corrected for the study site as a random effect. RESULTS In the total sample (67 years [SD, 11.5], 40% female), we found a dose-dependent inverse relationship between WMH volume and poststroke cognitive functioning across all 4 cognitive domains (coefficients ranging from -0.09 [SE, 0.04, P=0.01] for verbal memory to -0.19 [SE, 0.03, P<0.001] for attention and executive functioning). This relation was independent of acute infarct volume and the presence of lacunes and old infarcts. In stratified analyses, the relation between WMH volume and domain-specific functioning was also largely independent of infarct type. CONCLUSIONS In patients with ischemic stroke, increasing WMH volume is independently associated with worse cognitive functioning across all major domains, regardless of old ischemic lesions and infarct type.
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Affiliation(s)
- Floor A.S. de Kort
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
| | - Mirthe Coenen
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
| | - Nick A. Weaver
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
| | - Hugo J. Kuijf
- Image Sciences Institute, University Medical Center Utrecht, the Netherlands (H.J.K.)
| | - Hugo P. Aben
- Department of Neurology, Elisabeth Tweesteden Hospital, Tilburg, the Netherlands (H.P.A., P.L.M.d.K.)
| | - Hee-Joon Bae
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea (H.-J.B., J.K., B.J.K.)
| | - Régis Bordet
- Lille Neuroscience & Cognition (LilNCog) U1172, Université Lille, Inserm, CHU Lille, France (R.B., R.L.)
| | - Guido Cammà
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
| | - Christopher P.L.H. Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
- Memory, Aging and Cognition Center, National University Health System, Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
| | - Anna Dewenter
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Germany (A.D., M.D., R.F.)
| | - Marco Duering
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Germany (A.D., M.D., R.F.)
- Medical Image Analysis Center (MIAC) and Department of Biomedical Engineering, University of Basel, Switzerland (M.D.)
| | - Rong Fang
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Germany (A.D., M.D., R.F.)
| | - Ruben S. van der Giessen
- Department of Neurology, Erasmus Medical Center, Rotterdam, the Netherlands (R.S.v.d.G., P.J.K.)
| | - Olivia K.L. Hamilton
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, United Kingdom (O.K.L.H., J.M.W.)
- UK Dementia Research Institute at the University of Edinburgh, United Kingdom (O.K.L.H., J.M.W.)
- MRC/CSO Social and Public Health Sciences Unit, School of Health and Wellbeing, University of Glasgow, United Kingdom (O.K.L.H.)
| | - Saima Hilal
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
- Memory, Aging and Cognition Center, National University Health System, Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System (S.H.)
| | - Irene M.C. Huenges Wajer
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
- Experimental Psychology, Helmholtz Institute, Utrecht University, the Netherlands (I.M.C.H.W.)
| | - Cheuk Ni Kan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
- Memory, Aging and Cognition Center, National University Health System, Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
| | - Jonguk Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea (H.-J.B., J.K., B.J.K.)
| | - Beom Joon Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea (H.-J.B., J.K., B.J.K.)
| | - Sebastian Köhler
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, the Netherlands (S.K., F.R.J.V.)
| | - Paul L.M. de Kort
- Department of Neurology, Elisabeth Tweesteden Hospital, Tilburg, the Netherlands (H.P.A., P.L.M.d.K.)
| | - Peter J. Koudstaal
- Department of Neurology, Erasmus Medical Center, Rotterdam, the Netherlands (R.S.v.d.G., P.J.K.)
| | - Jae-Sung Lim
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea (J.-S.L.)
| | - Renaud Lopes
- Lille Neuroscience & Cognition (LilNCog) U1172, Université Lille, Inserm, CHU Lille, France (R.B., R.L.)
| | - Vincent C.T. Mok
- Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M.), The Chinese University of Hong Kong
- Lau Tat-Chuen Research Centre of Brain Degenerative Diseases in Chinese, Li Ka Shing Institute of Health Sciences, Gerald Choa Neuroscience Institute, Lui Chi Woo Institute of Innovative Medicine (V.C.T.M.), The Chinese University of Hong Kong
| | - Julie Staals
- Department of Neurology, Maastricht University Medical Center, the Netherlands (J.S.)
| | | | - Charlotte M. Verhagen
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
| | - Frans R.J. Verhey
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, the Netherlands (S.K., F.R.J.V.)
| | - Joanna M. Wardlaw
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, United Kingdom (O.K.L.H., J.M.W.)
- UK Dementia Research Institute at the University of Edinburgh, United Kingdom (O.K.L.H., J.M.W.)
| | - Xin Xu
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
- Memory, Aging and Cognition Center, National University Health System, Singapore (C.P.L.H.C., S.H., C.N.K., X.X.)
| | - Kyung-Ho Yu
- Department of Neurology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea (K.-H.Y.)
| | - J. Matthijs Biesbroek
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
- Department of Neurology, Diakonessenhuis Hospital, Utrecht, the Netherlands (J.M.B.)
| | - Geert Jan Biessels
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (F.A.S.d.K., M.C., N.A.W., G.C., I.M.C.H.W., C.M.V., J.M.B., G.J.B.)
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Chen TH, Lin SC, Chiou JF, Chen CP, Hsu SM, Tseng KH, Lu LS. Analysis of Skin Dose and Position Stability for a New Personalized Device for Breast Radiotherapy. Int J Radiat Oncol Biol Phys 2023; 117:e169. [PMID: 37784774 DOI: 10.1016/j.ijrobp.2023.06.1009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Whole breast irradiation is the standard treatment for patients with early-stage breast cancer. We previously developed a personalized breast support device (PERSBRA) that reduced heart and lung radiation exposure. However, the skin dose was concerned for the device due to its thickness. In this study, we designed the new honeycomb structures to reduce the dose to the skin and maintain stable breast position with this device. MATERIALS/METHODS Three different structures of PERSBRA were designed. They were solid structure, honeycomb structures with 3.5 mm wall thickness and honeycomb structures with 4.5 mm wall thickness respectively. Those patients who scheduled to receive whole breast irradiation were enrolled for anthropometric breast position analysis. Stability of breast position in supine with PERSBRA were analyzed by scanning with a 3D infrared scanner. The distances between the nipples, between the nipple and the xiphoid process, and between the nipple and the inframammary fold were used to be the index. 32 patients were enrolled for anthropometric breast position analysis. The skin dose was simulated using the thermoluminescent dosimeter (TLD) positioned on the phantom with PERSBRA in the treatment scenario. RESULTS The displacements between two nipples, the nipple and the infra mammary point, and the nipple and the xiphoid process were 1.4%, 1.2%, and 0.4% for 3.5 mm honeycomb structure. Meanwhile, these displacements were 0.8%, 0.7% and 0.2% for solid 10% structure. Compared to these results, there were no significant difference for the two designations. The surface dose simulating the treatment scenario were 78.27%, 89.39% and 91.9% of prescribed dose for the 3.5mm, 4.5 mm honeycomb structure and the solid 10% filled structure, respectively. The 3.5 mm honeycomb structure reduce the surface dose significantly compared to another two designations. CONCLUSION The honeycomb structures do not jeopardize mechanical properties of PERSBRA or the breast positional stability support. Moreover, honeycomb structure with 3.5 mm thickness effectively reduces skin surface dose on a breast phantom. These data encourage further clinical studies to investigate the effects of such design on radiation dermatitis during whole breast irradiation.
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Affiliation(s)
- T H Chen
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei, Taiwan
| | - S C Lin
- Department of Graduate Institution of Biomedical Material and Tissue Engineering, Taipei Medical University, Taipei, Taiwan
| | - J F Chiou
- Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - C P Chen
- Department of Radiation Oncology, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
| | - S M Hsu
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - K H Tseng
- Department of Electrical Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - L S Lu
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan
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Exalto LG, Weaver NA, Kuijf HJ, Aben HP, Bae HJ, Best JG, Bordet R, Chen CP, van der Giessen RS, Godefroy O, Gyanwali B, Hamilton OK, Hilal S, Huenges Wajer IM, Kim J, Kappelle LJ, Kim BJ, Köhler S, de Kort PL, Koudstaal PJ, Lim JS, Makin SD, Mok VC, van Oostenbrugge RJ, Roussel M, Staals J, Valdés-Hernández MDC, Venketasubramanian N, Verhey FR, Wardlaw JM, Werring DJ, Xu X, van Zandvoort MJ, Biesbroek JM, Chappell FM, Biessels GJ. Sex Differences in Poststroke Cognitive Impairment: A Multicenter Study in 2343 Patients With Acute Ischemic Stroke. Stroke 2023; 54:2296-2303. [PMID: 37551589 PMCID: PMC10453354 DOI: 10.1161/strokeaha.123.042507] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 06/02/2023] [Accepted: 06/09/2023] [Indexed: 08/09/2023]
Abstract
BACKGROUND Poststroke cognitive impairment (PSCI) occurs in about half of stroke survivors. Cumulative evidence indicates that functional outcomes of stroke are worse in women than men. Yet it is unknown whether the occurrence and characteristics of PSCI differ between men and women. METHODS Individual patient data from 9 cohorts of patients with ischemic stroke were harmonized and pooled through the Meta-VCI-Map consortium (n=2343, 38% women). We included patients with visible symptomatic infarcts on computed tomography/magnetic resonance imaging and cognitive assessment within 15 months after stroke. PSCI was defined as impairment in ≥1 cognitive domains on neuropsychological assessment. Logistic regression analyses were performed to compare men to women, adjusted for study cohort, to obtain odds ratios for PSCI and individual cognitive domains. We also explored sensitivity and specificity of cognitive screening tools for detecting PSCI, according to sex (Mini-Mental State Examination, 4 cohorts, n=1814; Montreal Cognitive Assessment, 3 cohorts, n=278). RESULTS PSCI was found in 51% of both women and men. Men had a lower risk of impairment of attention and executive functioning (men: odds ratio, 0.76 [95% CI, 0.61-0.96]), and language (men: odds ratio, 0.67 [95% CI, 0.45-0.85]), but a higher risk of verbal memory impairment (men: odds ratio, 1.43 [95% CI, 1.17-1.75]). The sensitivity of Mini-Mental State Examination (<25) for PSCI was higher for women (0.53) than for men (0.27; P=0.02), with a lower specificity for women (0.80) than men (0.96; P=0.01). Sensitivity and specificity of Montreal Cognitive Assessment (<26.) for PSCI was comparable between women and men (0.91 versus 0.86; P=0.62 and 0.29 versus 0.28; P=0.86, respectively). CONCLUSIONS Sex was not associated with PSCI occurrence but affected domains differed between men and women. The latter may explain why sensitivity of the Mini-Mental State Examination for detecting PSCI was higher in women with a lower specificity compared with men. These sex differences need to be considered when screening for and diagnosing PSCI in clinical practice.
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Affiliation(s)
- Lieza G. Exalto
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (L.G.E., N.A.W., I.M.C.H.W., L.J.K., M.J.E.v.Z., J.M.B., G.J.B.)
| | - Nick A. Weaver
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (L.G.E., N.A.W., I.M.C.H.W., L.J.K., M.J.E.v.Z., J.M.B., G.J.B.)
| | - Hugo J. Kuijf
- Image Sciences Institute, University Medical Center Utrecht, the Netherlands (H.J.K.)
| | - Hugo P. Aben
- Department of Neurology, Elisabeth Tweesteden Hospital, Tilburg, the Netherlands (H.P.A., P.L.M.d.K.)
| | - Hee-Joon Bae
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea (H.-J.B., J.K., B.J.K.)
| | - Jonathan G. Best
- Stroke Research Centre, Department of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, London, United Kingdom (J.G.B., D.J.W.)
| | - Régis Bordet
- Université Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, F-Lille, France (R.B.)
| | - Christopher P.L.H. Chen
- Department of Pharmacology, National University of Singapore (C.P.L.H.C., S.H., X.X.)
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore (C.P.L.H.C., B.G., S.H., X.X.)
| | - Ruben S. van der Giessen
- Department of Neurology, Erasmus Medical Center, Rotterdam, the Netherlands (R.S.v.d.G., P.J.K.)
| | - Olivier Godefroy
- Department of Neurology, Amiens University hospital, Laboratory of Functional Neurosciences, Jules Verne Picardy University, France (O.G., M.R.)
| | - Bibek Gyanwali
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore (C.P.L.H.C., B.G., S.H., X.X.)
| | - Olivia K.L. Hamilton
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, United Kingdom (O.K.L.H., M.d.C.V.-H., J.M.W.)
- UK Dementia Research Institute at the University of Edinburgh, United Kingdom (O.K.L.H., M.d.C.V.-H., J.M.W.)
- MRC/CSO Social and Public Health Sciences Unit, School of Health and Wellbeing (O.K.L.H.), University of Glasgow, United Kingdom
| | - Saima Hilal
- Department of Pharmacology, National University of Singapore (C.P.L.H.C., S.H., X.X.)
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore (C.P.L.H.C., B.G., S.H., X.X.)
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System (S.H.)
| | - Irene M.C. Huenges Wajer
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (L.G.E., N.A.W., I.M.C.H.W., L.J.K., M.J.E.v.Z., J.M.B., G.J.B.)
- Experimental Psychology, Helmholtz Institute, Utrecht University, the Netherlands (I.M.C.H.W., M.J.E.v.Z.)
| | - Jonguk Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea (H.-J.B., J.K., B.J.K.)
| | - L. Jaap Kappelle
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (L.G.E., N.A.W., I.M.C.H.W., L.J.K., M.J.E.v.Z., J.M.B., G.J.B.)
| | - Beom Joon Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea (H.-J.B., J.K., B.J.K.)
| | - Sebastian Köhler
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, the Netherlands (S.K., F.R.J.V.)
| | - Paul L.M. de Kort
- Department of Neurology, Elisabeth Tweesteden Hospital, Tilburg, the Netherlands (H.P.A., P.L.M.d.K.)
| | - Peter J. Koudstaal
- Department of Neurology, Erasmus Medical Center, Rotterdam, the Netherlands (R.S.v.d.G., P.J.K.)
| | - Jae-Sung Lim
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea (J.-S.L.)
| | - Stephen D.J. Makin
- Centre For Rural Health, Institute of Applied Health Sciences, University of Aberdeen, United Kingdom (S.D.J.M.)
| | - Vincent C.T. Mok
- Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M.), The Chinese University of Hong Kong
- Therese Pei Fong Chow Research Centre for Prevention of Dementia, Margaret Kam Ling Cheung Research Centre for Management of Parkinsonism, Gerald Choa Neuroscience Centre (V.C.T.M.), The Chinese University of Hong Kong
| | | | - Martine Roussel
- Department of Neurology, Amiens University hospital, Laboratory of Functional Neurosciences, Jules Verne Picardy University, France (O.G., M.R.)
| | - Julie Staals
- Department of Neurology, Maastricht University Medical Center, the Netherlands (R.J.v.O., J.S.)
| | - Maria del C. Valdés-Hernández
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, United Kingdom (O.K.L.H., M.d.C.V.-H., J.M.W.)
- UK Dementia Research Institute at the University of Edinburgh, United Kingdom (O.K.L.H., M.d.C.V.-H., J.M.W.)
| | | | - Frans R.J. Verhey
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, the Netherlands (S.K., F.R.J.V.)
| | - Joanna M. Wardlaw
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, United Kingdom (O.K.L.H., M.d.C.V.-H., J.M.W.)
- UK Dementia Research Institute at the University of Edinburgh, United Kingdom (O.K.L.H., M.d.C.V.-H., J.M.W.)
| | - David J. Werring
- Stroke Research Centre, Department of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, London, United Kingdom (J.G.B., D.J.W.)
| | - Xin Xu
- Department of Pharmacology, National University of Singapore (C.P.L.H.C., S.H., X.X.)
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore (C.P.L.H.C., B.G., S.H., X.X.)
| | - Martine J.E. van Zandvoort
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (L.G.E., N.A.W., I.M.C.H.W., L.J.K., M.J.E.v.Z., J.M.B., G.J.B.)
- Experimental Psychology, Helmholtz Institute, Utrecht University, the Netherlands (I.M.C.H.W., M.J.E.v.Z.)
| | - J. Matthijs Biesbroek
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (L.G.E., N.A.W., I.M.C.H.W., L.J.K., M.J.E.v.Z., J.M.B., G.J.B.)
- Department of Neurology, Diakonessenhuis Hospital, Utrecht, the Netherlands (J.M.B.)
| | - Francesca M. Chappell
- Social and Public Health Sciences Unit (F.M.C.), University of Glasgow, United Kingdom
| | - Geert Jan Biessels
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, the Netherlands (L.G.E., N.A.W., I.M.C.H.W., L.J.K., M.J.E.v.Z., J.M.B., G.J.B.)
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Huang CH, Chen CP, Huang YY, Hsu BRS. Modifiable factors related to 7-year renal outcomes in subjects with type 2 diabetes and chronic kidney disease stage 3. J Postgrad Med 2020; 66:187-193. [PMID: 33037171 PMCID: PMC7819377 DOI: 10.4103/jpgm.jpgm_680_19] [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] [Indexed: 01/21/2023] Open
Abstract
Background and Aims Subjects with diabetes are prone to a rapid decline in renal function and major adverse cardiovascular events when they reach chronic kidney disease (CKD) stage 3. This study aimed to identify modifiable risk factors associated with the progression of CKD in this population. Settings and Design An observational cohort study. Methods and Materials A total of 320 type 2 diabetic patients with CKD stage 3 registered in the shared-care-system in our hospital in 2010 were regularly followed up for 7 years. Demographic, laboratory, medication, and fundus examination data of these subjects were collected and analyzed. Statistical Analysis Used Cox regression was used to identify factors associated with changes in CKD stage. Results During the 7-year follow-up period, 204 cases (63.7%) remained at CKD stage 3 while 79 cases (24.7%) progressed to stage 4 or 5 and 37 cases (11.6%) improved to stage 1 or 2. The change in estimated glomerular filtration rate (eGFR) in the first 2 years and variations in glycated hemoglobin (HbA1c) over 7 years were independent factors of both progression (hazard ratio (HR) 1.098 and 1.710, respectively) and improvement (HR 0.919 and 0.231, respectively) of CKD stage. Variations in systolic blood pressure (SBP) was also found as an independent factor for progression of renal function (HR 1.052). Conclusions Our results demonstrated that fluctuations in HbA1c and SBP, and changes in eGFR during the first 2 years of treatment were associated with the long-term renal outcomes in type 2 diabetic patients with CKD stage 3.
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Affiliation(s)
- C H Huang
- Division of Endocrinology and Metabolism, Chang Gung Memorial Hospital at Linkou, Taiwan
| | - C P Chen
- Division of Endocrinology and Metabolism, Chang Gung Memorial Hospital at Linkou, Taiwan
| | - Y Y Huang
- Division of Endocrinology and Metabolism, Chang Gung Memorial Hospital at Linkou, Taiwan
| | - B R S Hsu
- Division of Endocrinology and Metabolism, Chang Gung Memorial Hospital at Linkou, Taiwan
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Dubucs C, Chassaing N, Sergi C, Aubert-Mucca M, Attié-Bitach T, Lacombe D, Thauvin-Robinet C, Arpin S, Perez MJ, Cabrol C, Chen CP, Aziza J, Colin E, Martinovic J, Calvas P, Plaisancié J. Re-focusing on Agnathia-Otocephaly complex. Clin Oral Investig 2020; 25:1353-1362. [PMID: 32643087 DOI: 10.1007/s00784-020-03443-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 07/03/2020] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Agnathia-otocephaly complex is a rare condition characterized by mandibular hypoplasia or agnathia, ear anomalies (melotia/synotia) and microstomia with aglossia. This severe anomaly of the first branchial arch is most often lethal. The estimated incidence is less than 1 in 70.000 births, with etiologies linked to both genetic and teratogenic factors. Most of the cases are sporadic. To date, two genes have been described in humans to be involved in this condition: OTX2 and PRRX1. Nevertheless, the overall proportion of mutated cases is unknown and a significant number of patients remain without molecular diagnosis. Thus, the involvement of other genes than OTX2 and PRRX1 in the agnathia-otocephaly complex is not unlikely. Heterozygous mutations in Cnbp in mice are responsible for mandibular and eye defects mimicking the agnathia-otocephaly complex in humans and appear as a good candidate. Therefore, in this study, we aimed (i) to collect patients presenting with agnathia-otocephaly complex for screening CNBP, in parallel with OTX2 and PRRX1, to check its possible implication in the human phenotype and (ii) to compare our results with the literature data to estimate the proportion of mutated cases after genetic testing. MATERIALS AND METHODS In this work, we describe 10 patients suffering from the agnathia-otocephaly complex. All of them benefited from array-CGH and Sanger sequencing of OTX2, PRRX1 and CNBP. A complete review of the literature was made using the Pubmed database to collect all the patients described with a phenotype of agnathia-otocephaly complex during the 20 last years (1998-2019) in order (i) to study etiology (genetic causes, iatrogenic causes…) and (ii), when genetic testing was performed, to study which genes were tested and by which type of technologies. RESULTS In our 10 patients' cohort, no point mutation in the three tested genes was detected by Sanger sequencing, while array-CGH has allowed identifying a 107-kb deletion encompassing OTX2 responsible for the agnathia-otocephaly complex phenotype in 1 of them. In 4 of the 70 cases described in the literature, a toxic cause was identified and 22 out the 66 remaining cases benefited from genetic testing. Among those 22 patients, 6 were carrying mutation or deletion in the OTX2 gene and 4 in the PRRX1 gene. Thus, when compiling results from our cohort and the literature, a total of 32 patients benefited from genetic testing, with only 34% (11/32) of patients having a mutation in one of the two known genes, OTX2 or PRRX1. CONCLUSIONS From our work and the literature review, only mutations in OTX2 and PRRX1 have been found to date in patients, explaining around one third of the etiologies after genetic testing. Thus, agnathia-otocephaly complex remains unexplained in the majority of the patients, which indicates that other factors might be involved. Although involved in first branchial arch defects, no mutation in the CNBP gene was found in this study. This suggests that mutations in CNBP might not be involved in such phenotype in humans or that, unlike in mice, a compensatory effect might exist in humans. Nevertheless, given that agnathia-otocephaly complex is a rare phenotype, more patients have to be screened for CNBP mutations before we definitively conclude about its potential implication. Therefore, this work presents the current state of knowledge on agnathia-otocephaly complex and underlines the need to expand further the understanding of the genetic bases of this disorder, which remains largely unknown. CLINICAL RELEVANCE We made here an update and focus on the clinical and genetic aspects of agnathia-otocephaly complex as well as a more general review of craniofacial development.
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Affiliation(s)
- C Dubucs
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,Département d'Anatomie et de Cytologie Pathologiques, Institut Universitaire du cancer de Toulouse, Toulouse, France
| | - N Chassaing
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,INSERM U1056, Université Toulouse III, Toulouse, France
| | - C Sergi
- Department of Lab. Med. & Pathology (5B4.09), University of Alberta, Edmonton, AB, Canada
| | - M Aubert-Mucca
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France
| | - T Attié-Bitach
- Unité d'Embryofœtopathologie, Service d'Histologie Embryologie Cytogénétique, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris (APHP), Paris, France.,Institut Imagine, INSERM U1163, Université Paris Descartes, Sorbonne Paris Cite, Paris, France
| | - D Lacombe
- Service de Génétique Médicale, CRMR, CHU de Bordeaux, Bordeaux, France.,INSERM U1211, Université de Bordeaux, 33076, Bordeaux, France
| | - C Thauvin-Robinet
- UMR1231 GAD, Inserm - Université Bourgogne-Franche Comté, Dijon, France.,Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU-TRANSLAD, CHU Dijon, Dijon, Bourgogne, France.,Centre de Référence maladies rares "Anomalies du Développement et syndromes malformatifs," Centre de Génétique, FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| | - S Arpin
- Service de Génétique Clinique, Centre Hospitalier Régional Universitaire de Tours, Tours, France
| | - M J Perez
- Department of Medical Genetics, Reference Center for Developmental Abnormalities and Constitutional Bone Diseases, CHRU, Montpellier, France
| | - C Cabrol
- Centre de Génétique Humaine, Centre Hospitalier Universitaire, Université de Franche-Comté, Besançon, France
| | - C P Chen
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - J Aziza
- Département d'Anatomie et de Cytologie Pathologiques, Institut Universitaire du cancer de Toulouse, Toulouse, France
| | - E Colin
- Department de Biochimie et Génétique, Centre Hospitalier Universitaire, Angers, France.,UMR CNRS 6214-INSERM 1083 and PREMMI, Université d'Angers, Angers, France
| | - J Martinovic
- Unit of Fetal Pathology, AP-HP Antoine Béclère Hospital, Clamart, France
| | - P Calvas
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France.,INSERM U1056, Université Toulouse III, Toulouse, France
| | - Julie Plaisancié
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France. .,INSERM U1056, Université Toulouse III, Toulouse, France.
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Abstract
Clefting of the secondary palate is one of the most common congenital anomalies, and the multiple corrective surgeries that individuals with isolated cleft palate undergo are associated with major costs and morbidities. Secondary palate development is a complex, multistep process that includes the elevation of the palatal shelves from a vertical to horizontal position, a process that is not well understood. The Hippo signaling cascade is a mechanosensory pathway that regulates morphogenesis, homeostasis, and regeneration by controlling cell proliferation, apoptosis, and differentiation, primarily via negative regulation of the downstream effectors, Yes-associated protein (YAP) and transcriptional coactivator with PDZ-binding motif (TAZ). We deleted Yap/Taz throughout the palatal shelf mesenchyme as well as specifically in the posterior palatal shelf mesenchyme, using the Osr2Cre and Col2Cre drivers, respectively, which resulted in palatal shelf elevation delay and clefting of the secondary palate. In addition, the deletion resulted in undersized bones of the secondary palate. We next determined downstream targets of YAP/TAZ in the posterior palatal shelves, which included Ibsp and Phex, genes involved in mineralization, and Loxl4, which encodes a lysyl oxidase that catalyzes collagen crosslinking. Ibsp, Phex, and Loxl4 were expressed at decreased levels in the ossification region in the posterior palatal shelf mesenchyme upon deletion of Yap/Taz. Furthermore, collagen levels were decreased specifically in the same region prior to elevation. Thus, our data suggest that YAP/TAZ may regulate collagen crosslinking in the palatal shelf mesenchyme, thus controlling palatal shelf elevation, as well as mineralization of the bones of the secondary palate.
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Affiliation(s)
- A F Goodwin
- Department of Orofacial Sciences, University of California, San Francisco, CA, USA.,Program in Craniofacial Biology, University of California, San Francisco, CA, USA
| | - C P Chen
- Department of Orofacial Sciences, University of California, San Francisco, CA, USA.,Program in Craniofacial Biology, University of California, San Francisco, CA, USA
| | - N T Vo
- Department of Orofacial Sciences, University of California, San Francisco, CA, USA.,Program in Craniofacial Biology, University of California, San Francisco, CA, USA
| | - J O Bush
- Program in Craniofacial Biology, University of California, San Francisco, CA, USA.,Department of Cell and Tissue Biology, University of California, San Francisco, CA, USA.,Institute of Human Genetics, University of California, San Francisco, CA, USA
| | - O D Klein
- Department of Orofacial Sciences, University of California, San Francisco, CA, USA.,Program in Craniofacial Biology, University of California, San Francisco, CA, USA.,Institute of Human Genetics, University of California, San Francisco, CA, USA.,Department of Pediatrics, University of California, San Francisco, CA, USA
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Weaver NA, Zhao L, Biesbroek JM, Kuijf HJ, Aben HP, Bae HJ, Caballero MÁ, Chappell FM, Chen CP, Dichgans M, Duering M, Georgakis MK, van der Giessen RS, Gyanwali B, Hamilton OK, Hilal S, vom Hofe EM, de Kort PL, Koudstaal PJ, Lam BY, Lim JS, Makin SD, Mok VC, Shi L, Valdés Hernández MC, Venketasubramanian N, Wardlaw JM, Wollenweber FA, Wong A, Xin X, Biessels GJ. The Meta VCI Map consortium for meta-analyses on strategic lesion locations for vascular cognitive impairment using lesion-symptom mapping: Design and multicenter pilot study. Alzheimers Dement (Amst) 2019; 11:310-326. [PMID: 31011619 PMCID: PMC6465616 DOI: 10.1016/j.dadm.2019.02.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
INTRODUCTION The Meta VCI Map consortium performs meta-analyses on strategic lesion locations for vascular cognitive impairment using lesion-symptom mapping. Integration of data from different cohorts will increase sample sizes, to improve brain lesion coverage and support comprehensive lesion-symptom mapping studies. METHODS Cohorts with available imaging on white matter hyperintensities or infarcts and cognitive testing were invited. We performed a pilot study to test the feasibility of multicenter data processing and analysis and determine the benefits to lesion coverage. RESULTS Forty-seven groups have joined Meta VCI Map (stroke n = 7800 patients; memory clinic n = 4900; population-based n = 14,400). The pilot study (six ischemic stroke cohorts, n = 878) demonstrated feasibility of multicenter data integration (computed tomography/magnetic resonance imaging) and achieved marked improvement of lesion coverage. DISCUSSION Meta VCI Map will provide new insights into the relevance of vascular lesion location for cognitive dysfunction. After the successful pilot study, further projects are being prepared. Other investigators are welcome to join.
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Affiliation(s)
- Nick A. Weaver
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Lei Zhao
- BrainNow Medical Technology Limited, Hong Kong Science and Technology Park, Shatin, Hong Kong SAR, China
| | - J. Matthijs Biesbroek
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Hugo J. Kuijf
- Image Sciences Institute, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Hugo P. Aben
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, the Netherlands
- Department of Neurology, Elisabeth Tweesteden Hospital, Tilburg, the Netherlands
| | - Hee-Joon Bae
- Department of Neurology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Miguel Á.A. Caballero
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
| | - Francesca M. Chappell
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
- UK Dementia Research Institute at the University of Edinburgh, Edinburgh, United Kingdom
| | - Christopher P.L.H. Chen
- Department of Pharmacology, National University of Singapore, Singapore, Singapore
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore
| | - Martin Dichgans
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Marco Duering
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Marios K. Georgakis
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | | | - Bibek Gyanwali
- Department of Pharmacology, National University of Singapore, Singapore, Singapore
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore
| | - Olivia K.L. Hamilton
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
- UK Dementia Research Institute at the University of Edinburgh, Edinburgh, United Kingdom
| | - Saima Hilal
- Department of Pharmacology, National University of Singapore, Singapore, Singapore
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore
- Departments of Radiology and Nuclear Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Elise M. vom Hofe
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Paul L.M. de Kort
- Department of Neurology, Elisabeth Tweesteden Hospital, Tilburg, the Netherlands
| | - Peter J. Koudstaal
- Department of Neurology, Erasmus Medical Center, Rotterdam, the Netherlands
| | - Bonnie Y.K. Lam
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
- Gerald Choa Neuroscience Centre, Therese Pei Fong Chow Research Centre for Prevention of Dementia, Lui Che Woo Institute of Innovative Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Jae-Sung Lim
- Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
| | - Stephen D.J. Makin
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom
| | - Vincent C.T. Mok
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
- Gerald Choa Neuroscience Centre, Therese Pei Fong Chow Research Centre for Prevention of Dementia, Lui Che Woo Institute of Innovative Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Lin Shi
- BrainNow Medical Technology Limited, Hong Kong Science and Technology Park, Shatin, Hong Kong SAR, China
- Department of Imaging and Interventional Radiology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Maria C. Valdés Hernández
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
- UK Dementia Research Institute at the University of Edinburgh, Edinburgh, United Kingdom
| | | | - Joanna M. Wardlaw
- Neuroimaging Sciences, Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
- UK Dementia Research Institute at the University of Edinburgh, Edinburgh, United Kingdom
| | - Frank A. Wollenweber
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Adrian Wong
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
- Gerald Choa Neuroscience Centre, Therese Pei Fong Chow Research Centre for Prevention of Dementia, Lui Che Woo Institute of Innovative Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Xu Xin
- Department of Pharmacology, National University of Singapore, Singapore, Singapore
- Memory, Aging and Cognition Center, National University Health System, Singapore, Singapore
| | - Geert Jan Biessels
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, University Medical Center Utrecht, Utrecht, the Netherlands
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Kumar P, Tripathi SK, Chen CP, Wickstrom E, Thakur ML. Evaluating Ga-68 Peptide Conjugates for Targeting VPAC Receptors: Stability and Pharmacokinetics. Mol Imaging Biol 2019; 21:130-139. [PMID: 29802552 DOI: 10.1007/s11307-018-1207-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 12/16/2022]
Abstract
PURPOSE In recent years, considerable progress has been made in the use of gallium-68 labeled receptor-specific peptides for imaging oncologic diseases. The objective was to examine the stability and pharmacokinetics of [68Ga]NODAGA and DOTA-peptide conjugate targeting VPAC [combined for vasoactive intestinal peptide (VIP) and pituitary adenylate cyclase-activating peptide (PACAP)] receptors on tumor cells. PROCEDURES A VPAC receptor-specific peptide was chosen as a model peptide and conjugated to NODAGA and DOTA via solid-phase synthesis. The conjugates were characterized by HPLC and MALDI-TOF. Following Ga-68 chelation, the radiochemical purity of Ga-68 labeled peptide conjugate was determined by radio-HPLC. The stability was tested against transmetallation using 100 nM Fe3+/Zn2+/Ca2+ ionic solution and against transchelation using 200 μM DTPA solution. The ex vivo and in vivo stability of the Ga-68 labeled peptide conjugate was tested in mouse plasma and urine. Receptor specificity was determined ex vivo by cell binding assays using human breast cancer BT474 cells. Positron emission tomography (PET)/X-ray computed tomography (CT) imaging, tissue distribution, and blocking studies were performed in mice bearing BT474 xenografts. RESULTS The chemical and radiochemical purity was greater than 95 % and both conjugates were stable against transchelation and transmetallation. Ex vivo stability at 60 min showed that the NODAGA-peptide-bound Ga-68 reduced to 42.1 ± 3.7 % (in plasma) and 37.4 ± 2.9 % (in urine), whereas the DOTA-peptide-bound Ga-68 was reduced to 1.2 ± 0.3 % (in plasma) and 4.2 ± 0.4 % (in urine) at 60 min. Similarly, the in vivo stability for [68Ga]NODAGA-peptide was decreased to 2.1 ± 0.2 % (in plasma) and 2.2 ± 0.4 % (in urine). For [68Ga]DOTA-peptide, it was decreased to 1.4 ± 0.3 % (in plasma) and 1.2 ± 0.4 % (in urine) at 60 min. The specific BT474 cell binding was 53.9 ± 0.8 % for [68Ga]NODAGA-peptide, 25.8 ± 1.4 % for [68Ga]-DOTA-peptide, and 18.8 ± 2.5 % for [68Ga]GaCl3 at 60 min. Inveon microPET/CT imaging at 1 h post-injection showed significantly (p < 0.05) higher tumor to muscle (T/M) ratio for [68Ga]NODAGA-peptide (3.4 ± 0.3) as compared to [68Ga]DOTA-peptide (1.8 ± 0.6). For [68Ga]GaCl3 and blocked mice, their ratios were 1.5 ± 0.6 and 1.5 ± 0.3 respectively. The tissue distributions data were similar to the PET imaging data. CONCLUSION NODAGA is superior to DOTA in terms of radiolabeling kinetics. The method of radiolabeling was reproducible and yielded higher specific activity. Although both agents have relatively low in vivo stability, PET/CT imaging studies delineated BC tumors with [68Ga]NODAGA-peptide, but not with [68Ga]DOTA-peptide.
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Affiliation(s)
- Pardeep Kumar
- Departments of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Sushil K Tripathi
- Departments of Radiology, Thomas Jefferson University, Philadelphia, PA, USA
| | - C P Chen
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, China
| | - Eric Wickstrom
- Departments of Biochemistry & Molecular Biology, Thomas Jefferson University, Philadelphia, PA, USA.,Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA
| | - Mathew L Thakur
- Departments of Radiology, Thomas Jefferson University, Philadelphia, PA, USA. .,Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, USA. .,Departments of Radiation Oncology, Thomas Jefferson University, 1020 Locust Street, JAH Suite 359, Philadelphia, PA, 19107, USA. .,Departments of Urology, Thomas Jefferson University, Philadelphia, PA, USA.
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Xu X, Shi JC, Wang CE, Liang L, Zheng R, Li K, Huang Y, Chen CP, Ye Q, Kan B. [Study on the mechanism of serotype conversion of historical isolates of Shigella flexneri]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 52:1050-1055. [PMID: 30392326 DOI: 10.3760/cma.j.issn.0253-9624.2018.10.016] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: The serotype screening of Shigella flexneri from 1934 to 1965 preserved by the National Center for Medical Culture Collections was carried out, and the molecular characteristics of the serotype conversion strains were studied. Methods: Serotyping of Shigella flexneri in this study was conducted by slide agglutination and multiplex PCR, respectively. The gtrⅡ gene sequence alignment and pulsed field gel electrophoresis typing were performed on the serotype conversion strains. Results: Among the 255 strains of Shigella flexneri preserved in CMCC (B) from 1934 to 1965, 79 were carrying gtrⅡ gene, of which 19 strains and 1 strain were agglutinated with the Y serotype and X serotype, respectively, and furthermore, the multiplex PCR assays results showed serotypes 2a and 2b, respectively, and the strains were considered to have serotype conversion. The 20 strains carrying the gtrⅡ gene showed multiple nucleotide mutations. Besides 3 strains of 3 amino acid mutations, the amino acid sequences of the other 17 strains showed a stop codon in advance, resulting in functional inactivation of gtrⅡ. PFGE analysis revealed that the similarity between the serotype Y strain carrying the gtrⅡ gene and the serotype 2a strain was 75.8%-100%, and the similarity between the serotype X strain carrying the gtrⅡ gene and the serotype 2b strain was 81.6%-100%. Conclusion: Mutations in the gtrⅡ gene are more complicated in serotype-transforming Shigella flexneri serotype Y or X strains. Molecular typing suggests that the serotype-transforming Shigella flexneri serotype Y or X strains may be derived from the Shigella flexneri serotype 2a or 2b, and advance the serotype conversion to 1949.
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Affiliation(s)
- X Xu
- National Center for Medical Culture Collections, National Institutes for Food and Drug Control, Beijing 102629, China
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10
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Chen CY, Chang HT, Chen CP, Sun FJ. First trimester placental vascular indices and volume by three-dimensional ultrasound in pre-gravid overweight women. Placenta 2019; 80:12-17. [PMID: 31103061 DOI: 10.1016/j.placenta.2019.03.014] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 03/14/2019] [Accepted: 03/25/2019] [Indexed: 12/29/2022]
Abstract
OBJECTIVES To investigate changes of placental vascular indices and volume in pre-gravid overweight Chinese women during the first trimester using three-dimensional power Doppler ultrasound. METHODS This was a prospective observational study of the morphology of placentas in pre-gravid overweight (body mass index (BMI) ≥ 24 kg/m2) and non-overweight (BMI < 24 kg/m2) Chinese women during the first trimester of pregnancy. Data on placental vascular indices (vascularization index, flow index, and vascularization flow index (VFI)), placental volume, uterine artery pulsatility index (PI), and neonatal outcomes were obtained during the first trimester and analyzed. Linear regression analysis was used to evaluate confounding factors between BMI and ultrasound indices. RESULTS Of the 429 pregnant women enrolled, 68 (15.9%) were pre-gravid overweight. Placental VFI was significantly lower in the overweight group (p = 0.037). Conversely, placental volume was significantly larger in the overweight group (p = 0.044), and uterine artery PI was significantly higher in the overweight group (p = 0.021). After adjustments for confounding factors, there were still significant differences in placental VFI (unstandardized coefficient (B) -0.666, 95% confidence interval (CI) -1.306 - (-0.025)), placental volume (B 2.458, 95% CI 0.071-4.844), and uterine artery PI (B 0.152, 95% CI 0.030-0.274) between the two groups. CONCLUSIONS Placental vascular indices using three-dimensional power Doppler ultrasound can provide an insight into placental vascularization in pre-gravid overweight women in early pregnancy. Alterations in placental VFI, placental volume, and uterine artery PI occur during the first trimester in pre-gravid overweight women.
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Affiliation(s)
- C Y Chen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
| | - H T Chang
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - F J Sun
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
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Verhaaren BF, Debette S, Bis JC, Smith JA, Ikram MK, Adams HH, Beecham AH, Rajan KB, Lopez LM, Barral S, van Buchem MA, van der Grond J, Smith AV, Hegenscheid K, Aggarwal NT, de Andrade M, Atkinson EJ, Beekman M, Beiser AS, Blanton SH, Boerwinkle E, Brickman AM, Bryan RN, Chauhan G, Chen CP, Chouraki V, de Craen AJ, Crivello F, Deary IJ, Deelen J, De Jager PL, Dufouil C, Elkind MS, Evans DA, Freudenberger P, Gottesman RF, Guðnason V, Habes M, Heckbert SR, Heiss G, Hilal S, Hofer E, Hofman A, Ibrahim-Verbaas CA, Knopman DS, Lewis CE, Liao J, Liewald DC, Luciano M, van der Lugt A, Martinez OO, Mayeux R, Mazoyer B, Nalls M, Nauck M, Niessen WJ, Oostra BA, Psaty BM, Rice KM, Rotter JI, von Sarnowski B, Schmidt H, Schreiner PJ, Schuur M, Sidney SS, Sigurdsson S, Slagboom PE, Stott DJ, van Swieten JC, Teumer A, Töglhofer AM, Traylor M, Trompet S, Turner ST, Tzourio C, Uh HW, Uitterlinden AG, Vernooij MW, Wang JJ, Wong TY, Wardlaw JM, Windham BG, Wittfeld K, Wolf C, Wright CB, Yang Q, Zhao W, Zijdenbos A, Jukema JW, Sacco RL, Kardia SL, Amouyel P, Mosley TH, Longstreth WT, DeCarli CC, van Duijn CM, Schmidt R, Launer LJ, Grabe HJ, Seshadri SS, Ikram MA, Fornage M. Multiethnic genome-wide association study of cerebral white matter hyperintensities on MRI. Circ Cardiovasc Genet 2015; 8:398-409. [PMID: 25663218 PMCID: PMC4427240 DOI: 10.1161/circgenetics.114.000858] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 01/23/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND The burden of cerebral white matter hyperintensities (WMH) is associated with an increased risk of stroke, dementia, and death. WMH are highly heritable, but their genetic underpinnings are incompletely characterized. To identify novel genetic variants influencing WMH burden, we conducted a meta-analysis of multiethnic genome-wide association studies. METHODS AND RESULTS We included 21 079 middle-aged to elderly individuals from 29 population-based cohorts, who were free of dementia and stroke and were of European (n=17 936), African (n=1943), Hispanic (n=795), and Asian (n=405) descent. WMH burden was quantified on MRI either by a validated automated segmentation method or a validated visual grading scale. Genotype data in each study were imputed to the 1000 Genomes reference. Within each ethnic group, we investigated the relationship between each single-nucleotide polymorphism and WMH burden using a linear regression model adjusted for age, sex, intracranial volume, and principal components of ancestry. A meta-analysis was conducted for each ethnicity separately and for the combined sample. In the European descent samples, we confirmed a previously known locus on chr17q25 (P=2.7×10(-19)) and identified novel loci on chr10q24 (P=1.6×10(-9)) and chr2p21 (P=4.4×10(-8)). In the multiethnic meta-analysis, we identified 2 additional loci, on chr1q22 (P=2.0×10(-8)) and chr2p16 (P=1.5×10(-8)). The novel loci contained genes that have been implicated in Alzheimer disease (chr2p21 and chr10q24), intracerebral hemorrhage (chr1q22), neuroinflammatory diseases (chr2p21), and glioma (chr10q24 and chr2p16). CONCLUSIONS We identified 4 novel genetic loci that implicate inflammatory and glial proliferative pathways in the development of WMH in addition to previously proposed ischemic mechanisms.
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Affiliation(s)
- Benjamin F.J. Verhaaren
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Radiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Stéphanie Debette
- Inserm U897, Université Bordeaux Segalen, Bordeaux
- Dept of Neurology, Lariboisière Hospital, Paris
- Inserm U1191, Montpellier, France
- Dept of Neurology, Boston Univ School of Medicine, Boston, MA
| | - Joshua C. Bis
- Cardiovascular Health Research Unit, Dept of Medicine, Seattle, WA
| | - Jennifer A. Smith
- Dept of Epidemiology, School of Public Health, Univ of Michigan, Ann Arbor, MI
| | - M. Kamran Ikram
- Singapore Eye Research Institute, Singapore National Eye Centre, National Univ of Singapore & National Univ Health System, Singapore
- Dept of Ophthalmology, National Univ of Singapore & National Univ Health System, Singapore
- Memory Aging & Cognition Centre, National Univ of Singapore, Singapore
| | - Hieab H. Adams
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Radiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Ashley H. Beecham
- John P. Hussman Institute for Human Genomics, Univ of Miami, Miller School of Medicine, Miami, FL
| | | | - Lorna M. Lopez
- Centre for Cognitive Ageing & Cognitive Epidemiology, Psychology, Univ of Edinburgh, United Kingdom
| | - Sandra Barral
- Dept of Neurology, Columbia Univ Medical Ctr, New York, NY
| | | | | | | | - Katrin Hegenscheid
- Dept of Diagnostic Radiology & Neuroradiology, Univ Medicine Greifswald, Greifswald, Germany
| | | | - Mariza de Andrade
- Division of Biomedical Statistics & Informatics, Mayo Clinic, Rochester, MN
| | | | - Marian Beekman
- Dept of Molecular Epidemiology, Leiden Univ Medical Ctr, Leiden, the Netherlands
| | - Alexa S. Beiser
- Dept of Neurology, Boston Univ School of Medicine, Boston, MA
- National Heart, Lung, & Blood Institute's Framingham Heart Study, Framingham
- Dept of Biostatistics, Boston Univ School of Public Health, Boston, MA
| | - Susan H. Blanton
- John P. Hussman Institute for Human Genomics, Univ of Miami, Miller School of Medicine, Miami, FL
- Dr. John T. Macdonald Foundation Dept of Human Genetics, Univ of Miami, Miller School of Medicine, Miami, FL
- Neuroscience Program, Univ of Miami, Miller School of Medicine, Miami, FL
| | - Eric Boerwinkle
- Human Genetics Ctr, Univ of Texas Health Science Ctr at Houston, Houston, TX
| | - Adam M. Brickman
- G.H. Sergievsky Ctr, Taub Institute for Research on Alzheimer’s Disease & Aging Brain, Columbia Univ Medical Ctr, New York, NY
| | - R. Nick Bryan
- Dept of Radiology, Perelman School of Medicine, Univ of Pennsylvania Health System, Philadelphia, PA
| | - Ganesh Chauhan
- Inserm U897, Université Bordeaux Segalen, Bordeaux
- Inserm U1191, Montpellier, France
| | | | - Vincent Chouraki
- Dept of Neurology, Boston Univ School of Medicine, Boston, MA
- National Heart, Lung, & Blood Institute's Framingham Heart Study, Framingham
| | - Anton J.M. de Craen
- Dept of Gerontology & Geriatrics, Leiden Univ Medical Ctr, Leiden, the Netherlands
| | | | - Ian J. Deary
- Centre for Cognitive Ageing & Cognitive Epidemiology, Psychology, Univ of Edinburgh, United Kingdom
| | - Joris Deelen
- Dept of Molecular Epidemiology, Leiden Univ Medical Ctr, Leiden, the Netherlands
| | | | | | - Mitchell S.V. Elkind
- Dept of Neurology, College of Physicians & Surgeons, Dept of Epidemiology, Mailman School of Public Health, Columbia Univ, New York, NY
| | | | - Paul Freudenberger
- Institute of Molecular Biology & Biochemistry, Medical Univ Graz, Graz, Austria
| | | | - Vilmundur Guðnason
- The Icelandic Heart Association, Kopavogur, Iceland
- Faculty of Medicine, Univ of Iceland, Reykjavik, Iceland
| | - Mohamad Habes
- Dept of Radiology, Perelman School of Medicine, Univ of Pennsylvania Health System, Philadelphia, PA
- Institutes for Community Medicine, Univ Medicine Greifswald, Greifswald, Germany
| | - Susan R. Heckbert
- Cardiovascular Health Research Unit, Dept of Medicine, Seattle, WA
- Cardiovascular Health Research Unit, Dept of Medicine Epidemiology, Univ of Washington, Seattle, WA
| | - Gerardo Heiss
- Dept of Epidemiology, Univ of North Carolina at Chapel Hill School of Public Health, Chapel Hill, NC
| | - Saima Hilal
- Memory Aging & Cognition Centre, National Univ of Singapore, Singapore
| | - Edith Hofer
- Dept of Neurology, Clinical Division of Neurogeriatrics, Medical Univ Graz, Graz, Austria
- Institute for Medical Informatics, Statistics & Documentation, Medical Univ Graz, Graz, Austria
| | - Albert Hofman
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Carla A. Ibrahim-Verbaas
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Neurology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | | | - Cora E. Lewis
- Division of Preventive Medicine, Univ of Alabama, Birmingham, AL
| | - Jiemin Liao
- Singapore Eye Research Institute, Singapore National Eye Centre, National Univ of Singapore & National Univ Health System, Singapore
- Dept of Ophthalmology, National Univ of Singapore & National Univ Health System, Singapore
| | - David C.M. Liewald
- Centre for Cognitive Ageing & Cognitive Epidemiology, Psychology, Univ of Edinburgh, United Kingdom
| | - Michelle Luciano
- Centre for Cognitive Ageing & Cognitive Epidemiology, Psychology, Univ of Edinburgh, United Kingdom
| | - Aad van der Lugt
- Dept of Radiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Oliver O. Martinez
- Alzheimer's Disease Ctr, Imaging of Dementia & Aging (IdeA) Laboratory, Dept of Neurology, Ctr for Neuroscience, Univ of California, Davis, CA
| | - Richard Mayeux
- G.H. Sergievsky Ctr, Taub Institute for Research on Alzheimer’s Disease & Aging Brain, Columbia Univ Medical Ctr, New York, NY
| | | | - Mike Nalls
- Laboratory of Neurogenetics, The National Institutes of Health, Bethesda, MD
| | - Matthias Nauck
- Clinical Chemistry & Laboratory Medicine, Univ Medicine Greifswald, Greifswald, Germany
| | - Wiro J. Niessen
- Dept of Radiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Medical Informatics, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Faculty of Applied Sciences, Delft Univ of Technology, Delft, the Netherlands
| | - Ben A. Oostra
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Bruce M. Psaty
- Cardiovascular Health Research Unit, Dept of Medicine, Seattle, WA
- Cardiovascular Health Research Unit, Dept of Medicine Epidemiology, Univ of Washington, Seattle, WA
- Cardiovascular Health Research Unit, Dept of Medicine Health Services, Univ of Washington, Seattle, WA
- Group Health Research Institute, Group Health Cooperative, Seattle, WA
| | - Kenneth M. Rice
- Cardiovascular Health Research Unit, Dept of Biostatistics, Univ of Washington, Seattle, WA
| | - Jerome I. Rotter
- Institute for Translational Genomics & Population Sciences, Los Angeles Biomedical Research Institute, Harbor-UCLA Medical Ctr, Torrance, CA
- Dept of Neurology, Univ Medicine of Greifswald, Greifswald, Germany
| | | | - Helena Schmidt
- Dept of Neurology, Johns Hopkins Univ School of Medicine, Baltimore, MD
| | - Pamela J. Schreiner
- Division of Epidemiology & Community Health, Univ of Minnesota, Minneapolis, MN
| | - Maaike Schuur
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Neurology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | | | | | - P. Eline Slagboom
- Dept of Molecular Epidemiology, Leiden Univ Medical Ctr, Leiden, the Netherlands
| | - David J.M. Stott
- Institute of Cardiovascular and Medical Sciences, Faculty of Medicine, Univ of Glasgow, Glasgow
| | | | - Alexander Teumer
- Interfaculty Institute for Genetics & Functional Genomics, Univ Medicine Greifswald, Greifswald, Germany
| | | | - Matthew Traylor
- Research Centre for Stroke & Dementia, St. George's, Univ of London, London, United Kingdom
| | - Stella Trompet
- Dept of Cardiology, Leiden Univ Medical Ctr, Leiden, the Netherlands
- Interuniversity Cardiology Institute of the Netherlands, Utrecht, the Netherlands
| | | | | | - Hae-Won Uh
- Dept of Medical Statistics & Bioinformatics, Leiden Univ Medical Ctr, Leiden, the Netherlands
| | - André G. Uitterlinden
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Internal Medicine, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Clinical Chemistry, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Meike W. Vernooij
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Radiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Jing J. Wang
- National Heart, Lung, & Blood Institute's Framingham Heart Study, Framingham
- Dept of Biostatistics, Boston Univ School of Public Health, Boston, MA
| | - Tien Y. Wong
- Singapore Eye Research Institute, Singapore National Eye Centre, National Univ of Singapore & National Univ Health System, Singapore
- Dept of Ophthalmology, National Univ of Singapore & National Univ Health System, Singapore
| | - Joanna M. Wardlaw
- Centre for Cognitive Ageing & Cognitive Epidemiology, Psychology, Univ of Edinburgh, United Kingdom
- Brain Research Imaging Centre, SINAPSE Collaboration, Centre for Clinical Brain Sciences, Univ of Edinburgh, United Kingdom
| | - B. Gwen Windham
- Division of Geriatrics/ Gerontology, Univ of Mississippi Medical Ctr, Jackson, MS
| | - Katharina Wittfeld
- German Ctr for Neurodegenerative Diseases (DZNE), Rostock/Greifswald, Germany
| | | | - Clinton B. Wright
- Neuroscience Program, Univ of Miami, Miller School of Medicine, Miami, FL
- Dept of Epidemiology & Public Health Sciences, Univ of Miami, Miller School of Medicine, Miami, FL
- Dept of Neurology, Univ of Miami, Miller School of Medicine, Miami, FL
- Evelyn F. McKnight Brain Institute, Univ of Miami, Miller School of Medicine, Miami, FL
| | - Qiong Yang
- National Heart, Lung, & Blood Institute's Framingham Heart Study, Framingham
- Dept of Biostatistics, Boston Univ School of Public Health, Boston, MA
| | - Wei Zhao
- Dept of Epidemiology, School of Public Health, Univ of Michigan, Ann Arbor, MI
| | | | - J. Wouter Jukema
- Dept of Cardiology, Leiden Univ Medical Ctr, Leiden, the Netherlands
- Interuniversity Cardiology Institute of the Netherlands, Utrecht, the Netherlands
| | - Ralph L. Sacco
- Dept of Epidemiology & Public Health Sciences, Univ of Miami, Miller School of Medicine, Miami, FL
- Dept of Neurology, Univ of Miami, Miller School of Medicine, Miami, FL
- Evelyn F. McKnight Brain Institute, Univ of Miami, Miller School of Medicine, Miami, FL
| | - Sharon L.R. Kardia
- Dept of Epidemiology, School of Public Health, Univ of Michigan, Ann Arbor, MI
| | - Philippe Amouyel
- Inserm, U744, Lille, France
- Université Lille 2, Lille, France
- Institut Pasteur de Lille, Lille, France
- Ctr Hospitalier Régional Universitaire de Lille, Lille, France
| | | | - W. T. Longstreth
- Cardiovascular Health Research Unit, Dept of Medicine Epidemiology, Univ of Washington, Seattle, WA
- Cardiovascular Health Research Unit, Dept of Neurology, Univ of Washington, Seattle, WA
| | - Charles C. DeCarli
- Alzheimer's Disease Ctr, Imaging of Dementia & Aging (IdeA) Laboratory, Dept of Neurology, Ctr for Neuroscience, Univ of California, Davis, CA
| | | | - Reinhold Schmidt
- Dept of Neurology, Clinical Division of Neurogeriatrics, Medical Univ Graz, Graz, Austria
| | - Lenore J. Launer
- Laboratory of Epidemiology, Demography, & Biometry, National Institute of Aging, The National Institutes of Health, Bethesda, MD
| | - Hans J. Grabe
- Dept of Psychiatry & Psychotherapy, Univ Medicine Greifswald, Greifswald, Germany
| | - Sudha S. Seshadri
- Dept of Neurology, Boston Univ School of Medicine, Boston, MA
- National Heart, Lung, & Blood Institute's Framingham Heart Study, Framingham
| | - M. Arfan Ikram
- Dept of Epidemiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Radiology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
- Dept of Neurology, Erasmus MC Univ Medical Ctr, Rotterdam, the Netherlands
| | - Myriam Fornage
- Human Genetics Ctr, Univ of Texas Health Science Ctr at Houston, Houston, TX
- Institute of Molecular Medicine, Univ of Texas Health Science Ctr at Houston, Houston, TX
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Yokozawa T, Chen CP. Evidence suggesting a nitric oxide-scavenging activity for traditional crude drugs, and action mechanisms of Sanguisorbae Radix against oxidative stress and aging. J Am Aging Assoc 2013; 24:19-30. [PMID: 23604872 DOI: 10.1007/s11357-001-0003-7] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
In this series of experiments, we found that Sanguisorbae Radix extract possesses strong free radical-scavenging activity in vitro and in vivo. This crude drug protected against renal disease, which is closely associated with excessive generation of reactive oxygen species. We also showed that Sanguisorbae Radix extract can suppress lipid peroxidation and stimulate an antioxidant defense ability in SAM, suggesting that this crude drug may be an effective agent for ameliorating the pathological conditions related to excessive generation of free radicals and oxidant damage, particularly in the aging process.
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Affiliation(s)
- T Yokozawa
- Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, 2630 Sugitani, Toyama, 930-0194 Japan
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Chen CP, Wan JZ. A rapid learning and dynamic stepwise updating algorithm for flat neural networks and the application to time-series prediction. ACTA ACUST UNITED AC 2012; 29:62-72. [PMID: 18252280 DOI: 10.1109/3477.740166] [Citation(s) in RCA: 161] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A fast learning algorithm is proposed to find an optimal weights of the flat neural networks (especially, the functional-link network). Although the flat networks are used for nonlinear function approximation, they can be formulated as linear systems. Thus, the weights of the networks can be solved easily using a linear least-square method. This formulation makes it easier to update the weights instantly for both a new added pattern and a new added enhancement node. A dynamic stepwise updating algorithm is proposed to update the weights of the system on-the-fly. The model is tested on several time-series data including an infrared laser data set, a chaotic time-series, a monthly flour price data set, and a nonlinear system identification problem. The simulation results are compared to existing models in which more complex architectures and more costly training are needed. The results indicate that the proposed model is very attractive to real-time processes.
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Affiliation(s)
- C P Chen
- Dept. of Comput. Sci. & Eng., Wright State Univ., Dayton, OH
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Chen CP, Lin SP, Suo YN, Chern SR, Su JW, Wang W. Identification of a missense mutation of c.3064G>A, Gly1022Ser in exon 43 of COL1A1 gene in a girl with osteogenesis imperfecta type III. Genet Couns 2012; 23:359-365. [PMID: 23072183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Osteogenesis imperfecta (OI) types I-V have been inherited in an autosomal dominant pattern. OI type I is associated with mutations in COL1A1 mostly due to a null allele. OI types II-IV are associated with mutations in COL1A1 or COL1A2 and mostly are due to glycine substitutions. It has been suggested that the effect of glycine substitutions is position specific, and the substitution of glycine by serine has much less lethal effect than the substitutions by valine, aspartic acid, glutamic acid, arginine and cysteine. We report identification of c.3064G>A, GGT>AGT, Gly1022Ser (Gly(844) --> Ser844 in triple helix) in exon 43 of the COL1A1 gene in an 8-year-old girl with OI type III. Our report provides evidence that at triple helix glycine residue 844 (p.Gly1022), a glycine substitution by serine can result in OI type III but not a lethal outcome.
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Affiliation(s)
- C P Chen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.
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Chen CP, Lin SP, Chen MR, Su YN, Chern SR, Liu YP, Su JW, Lee MS, Wang W. Partial monosomy 3p (3p26.2 --> pter) and partial trisomy 5q (5q34 --> qter) in a girl with coarctation of the aorta, congenital heart defects, short stature, microcephaly and developmental delay. Genet Couns 2012; 23:405-413. [PMID: 23072190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A 1-year-and-3-month-old girl presented with psychomotor retardation, developmental delay, clinodactyly of the thumb, coarctation of the aorta, patent ductus arteriosus, peripheral pulmonary stenosis, atrial septal defect, microcephaly, brachycephaly, a small oval face, almond-shaped eyes, a down-turned mouth, a widened nasal bridge, hypertelorism, epicanthic folds, long philtrum, low-set large ears and but no craniosynostosis. Oligonucleotide-based array comparative genomic hybridization revealed a -4.79-Mb deletion of 3p26.2 --> pter encompassing CHL1 and CNTN4, and a -19.56-Mb duplication of 5q34 --> qter encompassing MSX2, NKX2-5 and NSD1. The karyotype of the girl was 46,XX,der(3)t(3;5)(p26.2;q34) pat. The present case adds distal 5q duplication to the list of chromosome aberrations associated with coarctation of the aorta.
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Affiliation(s)
- C P Chen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.
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Chen CP, Lin SP, Lin DS, Liu YP, Hsu LJ, Wang W. Clinical imaging findings in a girl with Hutchinson-Gilford progeria syndrome. Genet Couns 2012; 23:1-7. [PMID: 22611635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report an 82-year-old girl with premature aging, a karyotype of 46,XX and a de novo c.1824C>T mutation encoding p.G608G in the lamin A gene. The clinical features of accelerated aging and the molecular finding were consistent with the diagnosis of Hutchinson-Gilford progeria syndrome (HGPS). In this presentation, we demonstrate the radiological imaging findings of skeletal, oral and craniofacial phenotypes of abnormalities associated with HGPS. The oral and craniofacial abnormalities caused dental caries, severe malocclusion, and swallowing, feeding and speech problems. Dural calcification, and granulation in the ear drum and external ear canal were additionally observed.
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
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Ackerman WE, Bulmer JN, Carter AM, Chaillet JR, Chamley L, Chen CP, Chuong EB, Coleman SJ, Collet GP, Croy BA, de Mestre AM, Dickinson H, Ducray J, Enders AC, Fogarty NME, Gauster M, Golos T, Haider S, Heazell AE, Holland OJ, Huppertz B, Husebekk A, John RM, Johnsen GM, Jones CJP, Kalionis B, König J, Lorenzon AR, Moffett A, Moreira de Mello JC, Nuzzo AM, Parham P, Parolini O, Petroff MG, Pidoux G, Ramírez-Pinilla MP, Robinson WP, Rolfo A, Sadovsky Y, Soma H, Southcombe JH, Tilburgs T, Lash GE. IFPA Meeting 2011 workshop report III: Placental immunology; epigenetic and microRNA-dependent gene regulation; comparative placentation; trophoblast differentiation; stem cells. Placenta 2011; 33 Suppl:S15-22. [PMID: 22154501 DOI: 10.1016/j.placenta.2011.11.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 11/22/2011] [Accepted: 11/24/2011] [Indexed: 10/14/2022]
Abstract
Workshops are an important part of the IFPA annual meeting as they allow for discussion of specialised topics. At IFPA meeting 2011 there were twelve themed workshops, five of which are summarized in this report. These workshops related to various aspects of placental biology: 1) immunology; 2) epigenetics; 3) comparative placentation; 4) trophoblast differentiation; 5) stem cells.
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Affiliation(s)
- W E Ackerman
- Laboratory of Perinatal Research, Department of Obstetrics and Gynecology, The Ohio State University, Columbus, OH, USA
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Chen CP, Lin SP, Su YN, Chern SR, Tsai EJ, Wu PC, Lee CC, Wang W. Mosaic ring chromosome 4 in a child with mild dysmorphisms, congenital heart defects and developmental delay. Genet Couns 2011; 22:321-326. [PMID: 22029176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Chen CP, Lin SP, Chen M, Su YN, Chern SR, Wang TY, Liu YP, Tsai FJ, Lee CC, Chen YJ, Wang W. Mosaic supernumerary r(1)(p13.2q23.3) in a 10-year-old girl with epilepsy facial asymmetry psychomotor retardation kyphoscoliosis dermatofibrosarcoma and multiple exostoses. Genet Couns 2011; 22:273-280. [PMID: 22029168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report molecular cytogenetic characterization of mosaic supernumerary r(1)(p13.2q23.3) in a 10-year-old girl with epilepsy, facial asymmetry, psychomotor retardation, kyphoscoliosis, dermatofibrosarcoma and multiple exostoses. The supernumerary r(1) is associated with gene dosage increase of CHRNB2, ADAR and KCNJ10 in the pericentromeric area of 1q, and a breakpoint within CTTNBP2NL at 1p13.2. We speculate that the gene dosage increase of CHRNB2, ADAR and KCNJ10 is most likely responsible for epilepsy, and the breakpoint at 1p13.2 in the supernumerary r(1) is most likely responsible for the development of multiple exostoses and osteochondroma in this patient.
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
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Chen CP, Lin SP, Su YN, Chern SR, Tsai FJ, Wu PC, Chen LF, Wang W. A 24.2-Mb deletion of 4q12 --> q21.21 characterized by array CGH in a 131/2-year-old girl with short stature, mental retardation, developmental delay, hyperopia, exotropia, enamel defects, delayed tooth eruption and delayed puberty. Genet Couns 2011; 22:255-261. [PMID: 22029166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report molecular and cytogenetic characterization of proximal deletion of chromosome 4q, del(4)(q12 --> q21.21) in a 131/2-year-old girl with short stature, mental retardation, developmental delay, hyperopia, exotropia, enamel defects, delayed tooth eruption and delayed puberty. We speculate that haploinsufficiency of the AMTN, ENAM and AMBN genes is most likely responsible for dental disorders, haploinsufficiency of the BMP2K genes is most likely responsible for ocular disorders, and haploinsufficiency of the EREG, AREG and BTC genes is most likely responsible for delayed puberty in this patient.
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
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Chen CP, Lin SP, Su YN, Chern SR, Tsai FJ, Chen WL, Wang W. Self-injurious behavior associated with trisomy 9p (9p13.1 --> p24.3). Genet Couns 2011; 22:327-331. [PMID: 22029177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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22
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Narasimhalu K, Effendy S, Sim CH, Lee JM, Chen I, Hia SB, Xue HL, Corrales MP, Chang HM, Wong MC, Chen CP, Tan EK. A randomized controlled trial of rivastigmine in patients with cognitive impairment no dementia because of cerebrovascular disease. Acta Neurol Scand 2010; 121:217-24. [PMID: 19951274 DOI: 10.1111/j.1600-0404.2009.01263.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The safety and efficacy of early acetylcholinesterase inhibitors therapy in patients with cognitive impairment no dementia (CIND) after a cerebrovascular accident have not been examined. In this study, we investigated the safety and efficacy of rivastigmine in cognition, particularly executive function in patients with CIND because of cerebrovascular disease. METHODS This study was a 24-week, double-blind, randomized, placebo-controlled trial of ischemic stroke patients seen at a tertiary hospital who had cognitive impairment no dementia because of cerebrovascular disease. The intervention was either rivastigmine or placebo up to 9 mg/day. The primary outcome of interest was mean change from baseline in the Ten-Point Clock Drawing and Color Trails 1 and 2. RESULTS Fifty patients were randomized into rivastigmine (n = 25) and placebo (n = 25) arms. Patients in the rivastigmine group showed statistically significant improvement (1.70 vs 0.13, P = 0.02) on the animal subtask of the verbal fluency measure compared with placebo. There was also a trend (non-significant) towards improvement in Color Trails II. CONCLUSIONS In this pilot study, we demonstrated that rivastigmine was well tolerated in patients with CIND because of cerebrovascular disease and may potentially improve executive functioning.
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Affiliation(s)
- K Narasimhalu
- Center for Molecular Epidemiology, National University of Singapore, Singapore
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Chen CP, Tsai FJ, Lee CC, Chen WL, Pan CW, Wu PC, Wang W. Prenatal diagnosis of satellited 21q derived from pericentric inversion involving the satellite stalk region and terminal 21q. Genet Couns 2010; 21:353-357. [PMID: 20964129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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24
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Chen CP, Chern SR, Tsai FJ, Lin HH, Wui PC, Lee CC, Pan CW, Wang W. Prenatal diagnosis of partial monosomy 1q (1q42.3-qter) associated with hydrocephalus and corpus callosum agenesis. Genet Couns 2010; 21:451-455. [PMID: 21290974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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25
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Chen CP, Lin SP, Chern SR, Tsai FJ, Lee CC, Pan CW, Wu PC, Wang W. A 5.3-Mb duplication of 9p12 --> p13.1 characterized by array CGH in a female infant with developmental delay. Genet Couns 2010; 21:457-460. [PMID: 21290975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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26
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Chen CP, Lin SP, Chern SR, Tsai FJ, Wu PC, Lee CC, Chen LF, Lee MS, Wang W. Deletion 2q37.3->qter and duplication 15q24.3->qter characterized by array CGH in a girl with epilepsy and dysmorphic features. Genet Couns 2010; 21:263-267. [PMID: 20681230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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27
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Chen CH, Chen TH, Kuo SJ, Chen CP, Lee DJ, Ke YY, Yeh KT, Ma GC, Liu CS, Shih JC, Chen M. Genetic evaluation and management of fetal chylothorax: review and insights from a case of Noonan syndrome. Lymphology 2009; 42:134-138. [PMID: 19927903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Fetal chylothorax is one of a very few syndromes that can be treated in utero with thoracoamniotic shunting or pleurodesis by OK-432 as two major therapeutic modalities. We report on a fetus with Noonan syndrome and a missense mutation c.182A > C (p.Asp61Ala) of PTPN11 who responded poorly to antenatal pleurodesis by OK-432. Based on our previous publication and this case study, we propose that fetal chylothorax of a distinct genetic origin may respond poorly to OK-432 pleurodesis.
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Affiliation(s)
- C H Chen
- Department of Obstetrics and Gynecology, Changhua Christian Hospital, Changhua, Taiwan
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Liao YL, Tsai HY, Lin JH, Chen CP. SU-FF-I-68: Survey of MSCT and SSCT Scanners in Taiwan: Technical Factors, CTDIs, and Effective Doses. Med Phys 2009. [DOI: 10.1118/1.3181188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Tan EK, Lee J, Chen CP, Wong MC, Zhao Y. Case control analysis of LRRK2 Gly2385Arg in Alzheimer's disease. Neurobiol Aging 2009; 30:501-2. [PMID: 17720280 DOI: 10.1016/j.neurobiolaging.2007.07.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2007] [Revised: 07/10/2007] [Accepted: 07/18/2007] [Indexed: 10/22/2022]
Abstract
Alzheimer's disease (AD) pathology has been described in Parkinson's disease (PD) patients with leucine-rich repeat kinase-2 (LRRK2) mutations. A common LRRK2 Gly2385Arg variant has been widely shown to be associated with a twofold increased risk of PD in various Asian populations. In a case control study, the frequency of the heterozygous Gly2385Arg genotype was demonstrated in 4.3% of AD compared to 4.5% in controls (odds ratio=0.94, 95% CI 0.37-2.42, p=1.0). The Gly2385Arg variant does not appear to modulate the risk of AD in our population.
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Affiliation(s)
- E K Tan
- Department of Neurology, Singapore General Hospital, Singapore.
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Chen CP, Chern SR, Tsai EJ, Lee CC, Chen LF, Wang W. Prenatal diagnosis of partial trisomy 14q (14q31.1-->qter) and partial monosomy 5p (5p13.2-->pter) associated with polyhydramnios, short limbs, micropenis and brain malformations. Genet Couns 2009; 20:281-288. [PMID: 19852436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
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Abstract
A problem nowadays tissue engineers encounter in developing sizable tissue implants is the nonuniform spread of cells and/or extracellular matrices. Research shows such a nutrients transport restriction may be improved by employing hydrodynamic culture systems. We propose a compact model for the simulation of cell growth in a porous construct under direct perfusion. Unlike the previous model proposed in the literature, which composes a cellular scaffold sandwiched between two culture media layers, the current model includes only the scaffold layer to simplify the mathematical and computational complex. Results show the present single-layer model can predict cell spreads and the nutrient and metabolic waste distribution as accurately as does the three-layer model. Only if the hydrodynamic aspects such as the pressure and viscous stress are prominent to know, should the more sophisticated analyses with the three-layer model be employed. The compact model provides comparable investigations for the tissue-engineering construct developments.
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Affiliation(s)
- C A Chung
- Department of Mechanical Engineering, National Central University, Jhongli 32001, Taiwan.
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32
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De Silva DA, Woon FP, Chen CP, Chang HM, Koh TH, Cameron J, Kingwell B, Wong MC. 442: Arterial stiffness is associated with left ventricular hypertrophy among ischemic stroke patients. J Clin Neurosci 2008. [DOI: 10.1016/j.jocn.2007.07.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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33
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Chen CP, Shieh E, Chern SR, Wang W. Triploidy and fetal holoprosencephaly. Genet Couns 2008; 19:105-108. [PMID: 18564507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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34
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De Silva DA, Woon FP, Chen CP, Chang HM, Wong MC. Response to Letter by Sheikh. Stroke 2008. [DOI: 10.1161/strokeaha.107.505479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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35
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Chen CP, Hwu YM, Tsai FJ, Wang W. Occipital encephalocele associated with iniencephaly mimicking an unilateral nuchal tumor on prenatal ultrasound. Genet Couns 2008; 19:101-103. [PMID: 18564506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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36
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Tan EK, Lee J, Chen CP, Teo YY, Zhao Y, Lee WL. SORL1 haplotypes modulate risk of Alzheimer's disease in Chinese. Neurobiol Aging 2007; 30:1048-51. [PMID: 18063222 DOI: 10.1016/j.neurobiolaging.2007.10.013] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Revised: 10/18/2007] [Accepted: 10/25/2007] [Indexed: 11/17/2022]
Abstract
Genetic variants of the neuronal sortilin-related receptor (SORL1) have been demonstrated to modulate the risk of Alzheimer's disease (AD) in different American and European populations [Rogaeva, E., Meng, Y., Lee, J.H., Gu, Y., Kawarai, T., Zou, F., Katayama, T., Baldwin, C.T., Cheng, R., Hasegawa, H., Chen, F., Shibata, N., Lunetta, K.L., Pardossi-Piquard, R., Bohm, C., Wakutani, Y., Cupples, L.A., Cuenco, K.T., Green, R.C., Pinessi, L., Rainero, I., Sorbi, S., Bruni, A., Duara, R., Friedland, R.P., Inzelberg, R., Hampe, W., Bujo, H., Song, Y.Q., Andersen, O.M., Willnow, T.E., Graff-Radford, N., Petersen, R.C., Dickson, D., Der, S.D., Fraser, P.E., Schmitt-Ulms, G., Younkin, S., Mayeux, R., Farrer, L.A., St George-Hyslop, P., 2007. The neuronal sortilin-related receptor SORL1 is genetically associated with Alzheimer disease. Nat. Genet. 39 (2), 168-177]. We conducted haloptype analysis involving two genetic clusters of SORL1 in AD and controls among Han Chinese. rs3824968 (SNP 23) was associated with an increased risk of AD, and there was a trend towards association for rs1699102 (SNP 22) and rs2282649 (SNP 24). More robust associations were found for three-loci haplotypes. In particular, the GCA haplotype at SNPs 19-22-23 was associated with an increased risk (odds ratio 1.4), and CTC haplotype at SNPs 19-22-23 and TCT at SNPs 22-23-24 a decreased risk (odds ratio 0.67) of AD. The complete absence of some at-risk North European haplotypes in our Chinese study subjects was likely due to different ancestral origins, with allelic heterogeneity among races. However, our study suggests that certain SORL1 haplotypes at SNPs 19-24 modulated risk of AD in our Chinese population.
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Affiliation(s)
- E K Tan
- Department of Neurology, Singapore General Hospital, Singapore, Singapore.
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Chung CA, Chen CW, Chen CP, Tseng CS. Enhancement of cell growth in tissue-engineering constructs under direct perfusion: Modeling and simulation. Biotechnol Bioeng 2007; 97:1603-16. [PMID: 17304558 DOI: 10.1002/bit.21378] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Perfusion bioreactors improve mass transfer in cell-scaffold constructs. We developed a mathematical model to simulate nutrient flow through cellular constructs. Interactions among cell proliferation, nutrient consumption, and culture medium circulation were investigated. The model incorporated modified Contois cell-growth kinetics that includes effects of nutrient saturation and limited cell growth. Nutrient uptake was depicted through the Michaelis-Menton kinetics. To describe the culture medium convection, the fluid flow outside the cell-scaffold construct was described by the Navier-Stokes equations, while the fluid dynamics within the construct was modeled by Brinkman's equation for porous media flow. Effects of the media perfusion were examined by including time-dependant porosity and permeability changes due to cell growth. The overall cell volume was considered to consist of cells and extracellular matrices (ECM) as a whole without treating ECM separately. Numerical simulations show when cells were cultured subjected to direct perfusion, they penetrated to a greater extent into the scaffold and resulted in a more uniform spatial distribution. The cell amount was increased by perfusion and ultimately approached an asymptotic value as the perfusion rates increased in terms of the dimensionless Peclet number that accounts for the ratio of nutrient perfusion to diffusion. In addition to enhancing the nutrient delivery, perfusion simultaneously imposes flow-mediated shear stress to the engineered cells. Shear stresses were found to increase with cell growth as the scaffold void space was occupied by the cell and ECM volumes. The macro average stresses increased from 0.2 mPa to 1 mPa at a perfusion rate of 20 microm/s with the overall cell volume fraction growing from 0.4 to 0.7, which made the overall permeability value decrease from 1.35 x 10(-2)cm(2) to 5.51 x 10(-4)cm(2). Relating the simulation results with perfusion experiments in literature, the average shear stresses were below the critical value that would induce the chondrocyte necrosis.
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Affiliation(s)
- C A Chung
- Department of Mechanical Engineering, National Central University, Jhongli 32001, Taiwan.
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38
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Chen CP, Lin SP, Tzen CY, Hwu WL, Chern SR, Chuang CK, Chiang SS, Wang W. Prenatal diagnosis and genetic counseling of mucopolysaccharidosis type II (Hunter syndrome). Genet Couns 2007; 18:49-56. [PMID: 17515300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We present prenatal diagnosis of mucopolysaccharidosis type II (MPS II) (Hunter syndrome) and demonstrate marked mucopolysaccharide deposition in multiple vital organs in a 22-gestational-week affected fetus. Level II ultrasound showed cardiomegaly and hepatomegaly. Histological examinations of the fetal vital organs manifested marked mucopolysaccharide deposition. We suggest that any therapeutic approach and counseling for prenatally diagnosed MPS II should consider the early signs of in utero marked mucopolysaccharide storage.
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
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39
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Chen CP, Lin CJ, Chang TY, Hsu CY, Tzen CY, Wang W. Second-trimester diagnosis of limb-body wall complex with literature review of pathogenesis. Genet Couns 2007; 18:105-12. [PMID: 17515306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Three fetuses having limb-body wall complex (LBWC) with craniofacial defects and 9 fetuses having LBWC without craniofacial defects were diagnosed and delivered in the second trimester at Mackay Memorial Hospital during the period January 1990 - May 2006. Cases of LBWC with craniofacial defects showed severe anomalies of the upper limbs, craniofacial defects, constrictive amniotic bands and cranioplacental attachment, whereas, cases of LBWC without craniofacial defects presented major anomalies of the lower limbs, abnormal genitalia, anal atresia, renal defects, abdominoplacental attachment and umbilical cord abnormalities. The perinatal findings of LBWC with or without craniofacial defects were compared and the pathogenesis was discussed.
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MESH Headings
- Abdominal Wall/abnormalities
- Abnormalities, Multiple/diagnosis
- Abnormalities, Multiple/embryology
- Abnormalities, Multiple/epidemiology
- Abnormalities, Multiple/etiology
- Adult
- Chorionic Gonadotropin, beta Subunit, Human/blood
- Craniofacial Abnormalities/diagnosis
- Craniofacial Abnormalities/embryology
- Craniofacial Abnormalities/epidemiology
- Female
- Fetus/abnormalities
- Humans
- Incidence
- Limb Deformities, Congenital/diagnosis
- Limb Deformities, Congenital/embryology
- Limb Deformities, Congenital/epidemiology
- Limb Deformities, Congenital/etiology
- Male
- Maternal Age
- Pregnancy
- Pregnancy Trimester, Second
- Prenatal Diagnosis
- alpha-Fetoproteins/analysis
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
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Chen CP, Su YN, Lin CC, Li YC, Hsieh LJ, Lee CC, Wang W. Genetic counseling of prenatally detected unbalanced t(Y;15)(q12;p13). Genet Couns 2007; 18:455-457. [PMID: 18286828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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41
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Chen CP, Chien SC, Chern SR, Tzen CY, Wang W. Prenatal diagnosis of Dandy-Walker malformation associated with distal limb deficiencies. Genet Couns 2007; 18:343-347. [PMID: 18019377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report the perinatal findings of a 23 gestational-week fetus with Dandy-Walker malformation (DWM), ventriculomegaly, symmetrical transverse limb deficiencies, hypertelorism, frontal bossing, low-set ears, and a depressed nasal bridge. The karyotype was 46,XX. We believe that this combination is significant. Concomitant DWM and symmetrical distal limb deficiencies may represent a new entity that awaits more new cases for further delineation.
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan.
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Chen CP, Lee YJ, Chiu ST, Shyu WC, Lee MY, Huang SP, Li H. The application of stem cells in the treatment of ischemic diseases. Histol Histopathol 2006; 21:1209-16. [PMID: 16874664 DOI: 10.14670/hh-21.1209] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ischemia causes oxygen deprivation, cell injury and related organ dysfunction. Although ischemic injury may be local, it involves many biochemical changes in different cell types. The ability of stem cells to differentiate into different cell lineages provides the possibility of their use in treating a variety of diseases requiring tissue repair or reconstitution, such as stroke, ischemic retinopathy, myocardial infarction, ischemic disorders of the liver, ischemic renal failure, and ischemic limb dysfunction. Several cell types including embryonic stem cells, various progenitor and stem cells of hematopoietic or mesenchymal origin have been used in attempts to reconstitute injured tissue. Xenologous or autologous stem cells may be administered either through the peripheral vascular system or directly by regional injection. The stem cells are then guided to the infarct site by homing signals. Either by cell differentiation or paracrine effects, stem cells or progenitor cells participate in the reconstruction of a favorable microenvironment resulting in neovascularization and tissue regeneration that eventually improve the physiological function of organs with ischemic damage.
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Affiliation(s)
- C P Chen
- Division of High Risk Pregnancy, Mackay Memorial Hospital, Taipei, Taiwan
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Lee E, Hui S, Ho G, Tan EK, Chen CP. LRRK2 G2019S and I2020T mutations are not common in Alzheimer's disease and vascular dementia. Am J Med Genet B Neuropsychiatr Genet 2006; 141B:549-50. [PMID: 16741939 DOI: 10.1002/ajmg.b.30305] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chen CP, Lin SP, Chern SR, Lee CC, Chen LF, Chen YJ, Wang W. Molecular cytogenetic analysis of de novo partial monosomy 4p (4p16.2-->pter) and partial trisomy 8p (8p23.2-->pter). Genet Couns 2006; 17:81-5. [PMID: 16719283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
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45
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Chen CP, Lin SP, Lee CC, Town DD, Wang W. Partial trisomy 1p (1p36.22-->pter) and partial monosomy 9p (9p22.2-->pter) associated with achalasia, flexion deformity of the fingers and epilepsy in a girl. Genet Couns 2006; 17:301-6. [PMID: 17100198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We report on a 12-year-old girl presenting with mental retardation, trigonocephaly, midface hypoplasia, upward-slanting palpebral fissures, arched eyebrows, bilateral epicanthal folds, hypertelorism, a flattened nasal bridge, a short nose, anteverted nares, a long philtrum, a small mouth, micrognathia, low-set ears, a short neck, long digits, flexion deformity of the fingers of the hands, hypoplasia of the labia majora, hyperplasia of the labia minora, flat feet, dysphagia, frequent regurgitation, prominent esophageal dilation, and achalasia. Seizures were noted since 5 years of age. Cytogenetic analysis of her peripheral blood revealed a karyotype of 46,XX, der(9)t(1;9)(p36.22;p22.2)pat. Achalasia, an uncommon esophageal motor disorder, has not been previously described in association with either a deletion of 9p or a duplication of 1p.
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China.
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46
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Lin YH, Chen CP, Chen TC, Liang SJ, Hsu CS. Familial occurrence of isolated Dandy-Walker variant in two consecutive male fetuses. Genet Couns 2006; 17:461-3. [PMID: 17375534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
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47
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Chen CP, Wang TH, Chang TY, Lee CC, Chen WL, Chen LF, Wang W. Prenatal diagnosis of the supernumerary der(22)t(11;22) syndrome associated with abnormal sonographic findings. Genet Couns 2006; 17:469-72. [PMID: 17375536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
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48
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Chen CP, Lin SP, Chang TY, Tsai JD, Huang JK, Wang W. Recurrent Galloway Mowat syndrome associated with abnormal prenatal sonographic findings. Genet Couns 2006; 17:87-9. [PMID: 16719284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
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49
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Wang CB, Lin SP, Chen CP, Chen YJ, Lee CC. An unusual clinical characterization of a male with distal partial trisomy 1q42.1 and monosomy 4q35.1 and review of the literature. Genet Couns 2006; 17:435-40. [PMID: 17375530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We report a male patient with a karyotype of 46,XY, der(4)t(1;4)(q42.1;q35.1) inherited from a maternal balanced translocation involving chromosome 1q and 4q. The boy had corpus callosum dysgenesis, laryngomalacia, tracheobronchus, facial dysmorphism, simian creases, and developmental retardation. The first three features are unique compared to previous literature reports on distal partial trisomy 1q. This case report allows a further delineation of the distal partial trisomy 1q syndrome.
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Affiliation(s)
- C B Wang
- Department of Obstetrics and Gynecology, Chang Gung Memorial Hospital, Chia Yi, Taiwan
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Chen CP, Lin SP, Lin CC, Li YC, Hsieh LJ, Huang JK, Lee CC, Wang W. Spectral karyotyping and fluorescence in situ hybridization analysis of de novo partial trisomy 7p (7p21.2-->pter) and partial monosomy 12q (12q24.33-->qter). Genet Couns 2006; 17:57-63. [PMID: 16719278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
An 8-year-old boy presenting with hypotonia, moderate mental retardation, developmental delay, and psychomotor retardation is reported. Magnetic resonance imaging of the brain at age 3 years revealed a Dandy-Walker variant. Cytogenetic analysis of the peripheral blood revealed a derivative chromosome 12 with unknown additional material attached to the distal region of the long arm of chromosome 12. The parental karyotypes were normal. Spectral karyotyping (SKY) using the 24-color SKY probes and fluorescence in situ hybridization (FISH) using the specific 7p, 7q, 12p, and 12q telomeric probes confirmed a duplication of distal 7p and a deletion of terminal 12q. The karyotype of the proband was designated as 46,XY.ish der(12)t(7;12) (p21.2;q24. 33)(SKY+, 7pTEL+, 12qTEL-). The present case provides evidence for the association of partial trisomy 7p (7p21.2-->pter) and partial monosomy 12q (12q24.33-->qter) with a cerebellar malformation and the usefulness of SKY and FISH in the identification of a de novo aberrant chromosome resulting from an unbalanced translocation.
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Affiliation(s)
- C P Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China.
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