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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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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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Lo YK, Fu TC, Chen CP, Yuan SS, Hsu CC. Involvement of swallowing therapy is associated with improved long-term survival in patients with post-stroke dysphagia. Eur J Phys Rehabil Med 2020; 55:728-734. [PMID: 31958220 DOI: 10.23736/s1973-9087.19.05893-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
BACKGROUND The effects of swallowing therapy (ST) on long-term clinical outcomes in patients with post-stroke dysphagia (PSD) remain unclear. AIM This study explores the effect of ST, initiated within 6 months of the stroke onset, on long-term pneumonia-free and overall survival rates in PSD patients. DESIGN Retrospective cohort study. SETTING Longitudinal Health Insurance Database. POPULATION The study included 2994 eligible PSD patients between 2005 and 2013. METHODS Among the scrutinized PSD patients, ST was initiated during the nasogastric intubation (NGI) period and was implemented by physician discretion. Therefore, subjects who underwent ST were classified into the ST-intervention (STI) group and those without ST were classified into the non-ST (NST) group. Propensity score matching (PSM) was used to match age, sex, pneumonia events during the NGI period, the Charlson comorbidity index, and the National Institutes of Health Stroke Scale between the two groups. We started to follow all selected PSD patients 6 months after the onset of stroke for four years. Multivariable adjusted Cox regression and Kaplan-Meier estimations were conducted to assess the effects of ST and the ST duration on pneumonia-free and overall survival. RESULTS Overall, 1497 PSD patients aged approximately 68 years in each group were selected in this study. The pneumonia-free survival rate in STI subjects was 57.4% and was significantly greater (P=0.003) than that (54.2%) in NST subjects during the follow-up (F/U). A significantly improved (P<0.0001) overall survival rate was observed in STI subjects (75.0%) compared to NST subjects (63.7%) during the F/U. In STI subjects, ST duration ≥ 1 month was significantly (P=0.009) associated with reduced pneumonia incidence compared to those with ST duration<1 month. CONCLUSIONS Participation of ST within 6 months of the stroke onset is associated with decreased pneumonia incidence and improved long-term survival in selected PSD patients. In the selected STI subjects, longer ST duration may be valuable in pneumonia prevention. CLINICAL REHABILITATION IMPACT This study reveals that ST initiated within 6 months of the stroke onset may be associated with improved long-term survival in selected PSD patients.
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Affiliation(s)
- Yu-Kuan Lo
- Department of Physical Medicine and Rehabilitation, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Tieh-Cheng Fu
- Department of Physical Medicine and Rehabilitation, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan.,Community Medicine Research Center, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan
| | - Carl P Chen
- Department of Physical Medicine and Rehabilitation, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shin-Sheng Yuan
- Institute of Statistical Science, Academia Sinica, Taipei, Taiwan
| | - Chih-Chin Hsu
- Department of Physical Medicine and Rehabilitation, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan - .,Community Medicine Research Center, Keelung Chang Gung Memorial Hospital, Keelung, Taiwan.,School of Medicine, College of Medicine, Chang Gung University, Taoyuan, Taiwan
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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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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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Chen R, Chen CP, Preston JE. Effects of transthyretin on thyroxine and β-amyloid removal from cerebrospinal fluid in mice. Clin Exp Pharmacol Physiol 2017; 43:844-50. [PMID: 27220110 DOI: 10.1111/1440-1681.12598] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 05/14/2016] [Accepted: 05/20/2016] [Indexed: 11/28/2022]
Abstract
Transthyretin (TTR) is a binding protein for the thyroid hormone thyroxine (T4 ), retinol and β-amyloid peptide. TTR aids the transfer of T4 from the blood to the cerebrospinal fluid (CSF), but also prevents T4 loss from the blood-CSF barrier. It is, however, unclear whether TTR affects the clearance of β-amyloid from the CSF. This study aimed to investigate roles of TTR in β-amyloid and T4 efflux from the CSF. Eight-week-old 129sv male mice were anaesthetized and their lateral ventricles were cannulated. Mice were infused with artificial CSF containing (125) I-T4 /(3) H-mannitol, or (125) I-Aβ40/(3) H-inulin, in the presence or absence of TTR. Mice were decapitated at 2, 4, 8, 16, 24 minutes after injection. The whole brain was then removed and divided into different regions. The radioactivities in the brain were determined by liquid scintillation counting. At baseline, the net uptake of (125) I-T4 into the brain was significantly higher than that of (125) I-Aβ40, and the half time for efflux was shorter ((125) I-T4 , 5.16; (3) H-mannitol, 7.44; (125) I-Aβ40, 8.34; (3) H-inulin, 10.78 minutes). The presence of TTR increased the half time for efflux of (125) I-T4 efflux, and caused a noticeable increase in the uptake of (125) I-T4 and (125) I-Aβ40 in the choroid plexus, whilst uptakes of (3) H-mannitol and (3) H-inulin remained similar to control experiments. This study indicates that thyroxine and amyloid peptide effuse from the CSF using different transporters. TTR binds to thyroxine and amyloid peptide to prevent the loss of thyroxine from the brain and redistribute amyloid peptide to the choroid plexus.
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Affiliation(s)
- Ruoli Chen
- Institute of Pharmaceutical Science, King's College London, London, UK.,Institute of Science and Technology of Medicine, School of Pharmacy, Keele University, Staffordshire, UK
| | - Carl P Chen
- Institute of Pharmaceutical Science, King's College London, London, UK.,Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, College of Medicine, Chang Gung University, Taoyuan County, Taiwan, China
| | - Jane E Preston
- Institute of Pharmaceutical Science, King's College London, London, UK
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Huang YC, Wei KC, Chang CN, Chen PY, Hsu PW, Chen CP, Lu CS, Wang HL, Gutmann DH, Yeh TH. Transglutaminase 2 expression is increased as a function of malignancy grade and negatively regulates cell growth in meningioma. PLoS One 2014; 9:e108228. [PMID: 25247996 PMCID: PMC4172767 DOI: 10.1371/journal.pone.0108228] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 08/26/2014] [Indexed: 02/01/2023] Open
Abstract
Most meningiomas are benign, but some clinical-aggressive tumors exhibit brain invasion and cannot be resected without significant complications. To identify molecular markers for these clinically-aggressive meningiomas, we performed microarray analyses on 24 primary cultures from 21 meningiomas and 3 arachnoid membranes. Using this approach, increased transglutaminase 2 (TGM2) expression was observed, which was subsequently validated in an independent set of 82 meningiomas by immunohistochemistry. Importantly, the TGM2 expression level was associated with increasing WHO malignancy grade as well as meningioma recurrence. Inhibition of TGM2 function by siRNA or cystamine induced meningioma cell death, which was associated with reduced AKT phosphorylation and caspase-3 activation. Collectively, these findings suggest that TGM2 expression increases as a function of malignancy grade and tumor recurrence and that inhibition of TGM2 reduces meningioma cell growth.
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Affiliation(s)
- Yin-Cheng Huang
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Kuo-Chen Wei
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Chen-Nen Chang
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Pin-Yuan Chen
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Peng-Wei Hsu
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Carl P. Chen
- Department of Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Chin-Song Lu
- Department of Neurology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Neuroscience Research Center, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - Hung-Li Wang
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
| | - David H. Gutmann
- Department of Neurology, Washington University, School of Medicine, St. Louis, Missouri, United States of America
| | - Tu-Hsueh Yeh
- Department of Neurology, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Neuroscience Research Center, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
- Chang Gung University, College of Medicine, Taoyuan, Taiwan
- * E-mail:
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11
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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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18
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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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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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23
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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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24
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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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25
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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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26
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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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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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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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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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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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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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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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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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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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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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45
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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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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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Chen CP, Lee CC, Town DD, Chen WL, Chen LF, Lee MS, Pan CW, Wang W. Detection of euchromatic variants and unusual C band heterochromatin variants at genetic amniocentesis. Genet Couns 2006; 17:91-5. [PMID: 16719285] [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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Chen CP, Lin SP, Chern SR, Lee CC, Huang JK, Wang W. Direct transmission of the 18q- syndrome from mother to daughter. Genet Couns 2006; 17:185-9. [PMID: 16970036] [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: 05/11/2023]
Abstract
A 34-year-old mother presented moderate mental retardation, short stature, microcephaly, and characteristic facial dysmorphism. Her 12-year-old daughter manifested moderate mental retardation, short stature, microcephaly, dysplastic external ear canals, hearing impairment, and characteristic facial dysmorphism. Cytogenetic analysis of the family revealed a normal karyotype, 46,XY, in the father, and a 46,XX,del(18)(q22.2) karyotype in both mother and daughter. Molecular marker analysis determined direct transmission of the distal 18q deletion from mother to daughter. The present case provides evidence of fertility of the affected females and a mother-to-daughter direct transmission in the familial 18q- syndrome. Identification of affected females with the 18q- syndrome should include genetic counseling of possible direct transmission and consideration of birth control or prenatal genetic testing at reproductive age.
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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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