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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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2
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Kung YA, Huang SY, Huang CG, Liu KT, Huang PN, Yu KY, Yang SL, Chen CP, Cheng CY, Lee IK, Lin SM, Chang HP, Lin YT, Liu YC, Chen GW, Shih SR. Factors influencing neutralizing antibody titers elicited by coronavirus disease 2019 vaccines. Microbes Infect 2023; 25:105044. [PMID: 36096357 PMCID: PMC9461341 DOI: 10.1016/j.micinf.2022.105044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 09/02/2022] [Indexed: 02/04/2023]
Abstract
The World Health Organization has highlighted the importance of an international standard (IS) for severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) neutralizing antibody titer detection to calibrate diagnostic techniques. We applied an IS to calibrate neutralizing antibody titers (NTs) (international units/mL) in response to coronavirus disease 2019 (COVID-19) vaccination. Moreover, the association between different factors and neutralizing antibodies was analyzed. A total of 1667 serum samples were collected from participants receiving different COVID-19 vaccines. Antibody titers were determined by a microneutralization assay using live viruses in a biosafety level 3 (BSL-3) laboratory and a commercial serological MeDiPro kit. The titer determined using the MeDiPro kit was highly correlated with the NT determined using live viruses and calibrated using IS. Fever and antipyretic analgesic treatment were related to neutralizing antibody responses in ChAdOx1-S and BNT162b2 vaccinations. Individuals with diabetes showed a low NT elicited by MVC-COV1901. Individuals with hypertension receiving the BNT162b2 vaccine had lower NTs than those without hypertension. Our study provided the international unit (IU) values of NTs in vaccinated individuals for the development of vaccines and implementation of non-inferiority trials. Correlation of the influencing factors with NTs can provide an indicator for selecting COVID-19 vaccines based on personal attributes.
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Affiliation(s)
- Yu-An Kung
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Sheng-Yu Huang
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Chung-Guei Huang
- Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan,Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Kuan-Ting Liu
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan,Graduate Institute of Biomedical Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Peng-Nien Huang
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan,Division of Pediatric Infectious Diseases, Department of Pediatrics, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Kar-Yee Yu
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan,Graduate Institute of Biomedical Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shu-Li Yang
- Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chia-Pei Chen
- Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ching-Yun Cheng
- Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Ing-Kit Lee
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan,College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Shu-Min Lin
- College of Medicine, Chang Gung University, Taoyuan, Taiwan,Department of Thoracic Medicine, Chang Gung Memorial Hospital, Taoyuan, Taiwan,Department of Respiratory Therapy, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Han-Pin Chang
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yueh-Te Lin
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan,Graduate Institute of Biomedical Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yen-Chin Liu
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Guang-Wu Chen
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; Artificial Intelligence Research Center, Chang Gung University, Taoyuan, Taiwan; Department of Computer Science and Information Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, Taoyuan, Taiwan.
| | - Shin-Ru Shih
- Research Center for Emerging Viral Infections, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan; Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Research Center for Chinese Herbal Medicine, Research Center for Food and Cosmetic Safety, And Graduate Institute of Health Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan, Taiwan.
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3
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Chen CP, Su TC, Yang MJ, Chen WT, Siao AC, Huang LR, Lin YY, Kuo YC, Chung JF, Cheng CF, Ku HC, Kao YH. Green tea epigallocatechin gallate suppresses 3T3-L1 cell growth via microRNA-143/MAPK7 pathways. Exp Biol Med (Maywood) 2022; 247:1670-1679. [PMID: 35894140 PMCID: PMC9597208 DOI: 10.1177/15353702221108925] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Green tea epigallocatechin gallate (EGCG) and microRNA (miRNA) molecules modulate obesity. Nevertheless, it is still unknown whether EGCG modulates fat cell growth via miRNA-related signaling. In this study, white preadipocytes were used to examine whether the antimitogenic effect of EGCG on fat cells is regulated by the miR-143/MAPK7 pathway. We showed that EGCG upregulated the levels of miR-143, but not miR-155, in 3T3-L1 preadipocytes. Moreover, EGCG downregulated MAPK7 mRNA and protein levels time- and dose-dependently. MAPK7 expression increased during 3T3-L1 cell proliferation. miR-143 overexpression in the absence of EGCG mimicked the effects of EGCG to suppress preadipocyte growth and MAPK7 expression, whereas knockdown of miR-143 antagonized the EGCG-altered levels of miR-143, MAPK7, and pERK1/2 and reversed the EGCG-inhibited cell growth. These findings suggest that EGCG inhibits 3T3-L1 cell growth via miR-143/MAPK7 pathway.
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Affiliation(s)
- Chia-Pei Chen
- Department of Life Sciences, National
Central University, Taoyuan 320
| | - Tsung-Chen Su
- Tea Research and Extension Station,
Council of Agriculture, Taoyuan 326
| | - Meei-Ju Yang
- Tea Research and Extension Station,
Council of Agriculture, Taoyuan 326
| | - Wen-Ting Chen
- Department of Life Sciences, National
Central University, Taoyuan 320
| | - An-Ci Siao
- Department of Life Sciences, National
Central University, Taoyuan 320
| | - Ling-Ru Huang
- Department of Life Sciences, National
Central University, Taoyuan 320
| | - Yen-Yue Lin
- Department of Life Sciences, National
Central University, Taoyuan 320,Department of Emergency Medicine,
Taoyuan Armed Forces General Hospital, Taoyuan 325,Department of Emergency Medicine,
Tri-Service General Hospital, National Defense Medical Center, Taipei 114
| | - Yow-Chii Kuo
- Department of Gastroenterology,
Landseed Hospital, Taoyuan 324
| | - Jia-Fang Chung
- Department of Pediatrics, Taipei Tzu
Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142
| | - Ching-Feng Cheng
- Department of Pediatrics, Taipei Tzu
Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142,Institute of Biomedical Sciences,
Academia Sinica, Taipei 11529,Department of Pediatrics, Tzu Chi
University, Hualien 97004
| | - Hui-Chen Ku
- Department of Pediatrics, Taipei Tzu
Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 23142
| | - Yung-Hsi Kao
- Department of Life Sciences, National
Central University, Taoyuan 320,Yung-Hsi Kao.
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Chao CT, Chang CI, Wang PC, Chiang CF, Chen CP, Hsu HS, Hung KY. Impact of a kidney-specific disease-specific care certification program on the institutional performance indicators of hospitals caring for patients with chronic kidney disease: A national data analysis. Nephrology (Carlton) 2021; 26:669-675. [PMID: 33991037 DOI: 10.1111/nep.13901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/16/2021] [Accepted: 04/29/2021] [Indexed: 10/21/2022]
Abstract
AIM The prevalence of chronic kidney disease (CKD) is on the rise due to population aging and multimorbidity. Taiwan is particularly afflicted by this prevailing ailment. Although multidisciplinary pre-dialysis care has been implemented to halt CKD progression and reduce health-care utilization in Taiwan, more is needed to reduce the local burden of CKD. METHODS The Taiwan Joint Commission initiated a kidney-care disease-specific care (DSC) certification program since 2017, aiming to improve participating hospitals' quality of care for kidney disease and to synchronize the quality of kidney care across Taiwan. We analysed the trend of changes over time among the kidney DSC certification program participating institutes during the period before, during, and after DSC certification program implementation, using the Generalized Estimating Equation methods. RESULTS A total of 20 institutes participated in the DSC certification program focusing on kidney diseases between January 2018 and March 2020, among which 70% were medical centres. DSC certification program was shown to significantly reduce the annual incidence of arteriovenous fistula reconstruction while increase the levels of serum albumin and haemoglobin among patients with end-stage renal disease (ESRD) under haemodialysis over time. For parameters related to peritoneal dialysis (PD), participating in the kidney-care DSC certification program significantly increased serum albumin levels among these patients with ESRD over time. CONCLUSION In this study, we discovered that a kidney-care DSC certification program significantly improved multiple performance indicators of participating institutes including patients' haemoglobin, albumin, and shunt re-creation probability among patients with end-stage renal disease.
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Affiliation(s)
- Chia-Ter Chao
- Nephrology Division, Department of Internal Medicine, National Taiwan University Hospital BeiHu Branch, Taipei, Taiwan.,Nephrology Division, Department of Internal Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.,Graduate Institute of Toxicology, National Taiwan University, Taipei, Taiwan
| | - Ching-I Chang
- Division of Quality Improvement, Joint Commission of Taiwan, Taipei, Taiwan
| | - Pa-Chun Wang
- Chief Executive Officer Office, Joint Commission of Taiwan, Taipei, Taiwan.,Quality Management Center, Cathay General Hospital, Taipei, Taiwan
| | - Ching-Feng Chiang
- Chief Executive Officer Office, Joint Commission of Taiwan, Taipei, Taiwan
| | - Chia-Pei Chen
- Division of Quality Improvement, Joint Commission of Taiwan, Taipei, Taiwan
| | - Hui-Shu Hsu
- Chief Executive Officer Office, Joint Commission of Taiwan, Taipei, Taiwan
| | - Kuan-Yu Hung
- Nephrology Division, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
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5
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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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6
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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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8
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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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9
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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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Wu DJ, Gu R, Sarin R, Zavodovskaya R, Chen CP, Christiansen BA, Zarbalis KS, Adamopoulos IE. Corrigendum to "Autophagy-linked FYVE containing protein WDFY3 interacts with TRAF6 and modulates RANKL-induced osteoclastogenesis" [J. Autoimmun. 73C (2016) 73-84]. J Autoimmun 2017; 84:132. [PMID: 28757133 DOI: 10.1016/j.jaut.2017.06.011] [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: 11/28/2022]
Affiliation(s)
- Dennis J Wu
- Graduate Group in Immunology, University of California at Davis, United States; Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States
| | - Ran Gu
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States
| | - Ritu Sarin
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States
| | - Regina Zavodovskaya
- Department of Anatomy, Physiology and Cell Biology, University of California at Davis, United States
| | - Chia-Pei Chen
- Department of Statistics, University of California at Davis, United States
| | | | - Konstantinos S Zarbalis
- Department of Pathology and Laboratory Medicine, University of California at Davis, United States; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Northern California, United States
| | - Iannis E Adamopoulos
- Graduate Group in Immunology, University of California at Davis, United States; Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States; Department of Pathology and Laboratory Medicine, University of California at Davis, United States.
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12
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Wu DJ, Gu R, Sarin R, Zavodovskaya R, Chen CP, Christiansen BA, Zarbalis KS, Adamopoulos IE. Autophagy-linked FYVE containing protein WDFY3 interacts with TRAF6 and modulates RANKL-induced osteoclastogenesis. J Autoimmun 2016; 73:73-84. [PMID: 27330028 DOI: 10.1016/j.jaut.2016.06.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 05/12/2016] [Revised: 06/07/2016] [Accepted: 06/13/2016] [Indexed: 12/20/2022]
Abstract
Recently, autophagy-related proteins were shown to regulate osteoclast mediated bone resorption, a critical process in autoimmune diseases such as rheumatoid arthritis. However, the role of autophagy-linked FYVE containing protein, WDFY3, in osteoclast biology remains elusive. WDFY3 is a master regulator in selective autophagy for clearing ubiquitinated protein aggregates and has been linked with rheumatoid arthritis. Herein, we used a series of WDFY3 transgenic mice (Wdfy3(lacZ) and Wdfy3(loxP)) to investigate the function of WDFY3 in osteoclast development and function. Our data demonstrate that WDFY3 is highly expressed at the growth plate of neonatal mice and is expressed in osteoclasts in vitro cultures. Osteoclasts derived from WDFY3 conditional knockout mice (Wdfy3(loxP/loxP)-LysM-Cre(+)) demonstrated increased osteoclast differentiation as evidenced by higher number and enlarged size of TRAP(+) multinucleated cells. Western blot analysis also revealed up-regulation of TRAF6 and an increase in RANKL-induced NF-κB signaling in WDFY3-deficient bone marrow-derived macrophages compared to wild type cultures. Consistent with these observations WDFY3-deficient cells also demonstrated an increase in osteoclast-related genes Ctsk, Acp5, Mmp9 and an increase of dentine resorption in in vitro assays. Importantly, in vivo RANKL gene transfer exacerbated bone loss in WDFY3 conditional knockout mice, as evidenced by elevated serum TRAP, CTX-I and micro-CT analysis of distal femurs compared to wild type littermates. Taken together, our data highlight a novel role for WDFY3 in osteoclast development and function, which can be exploited for the treatment of musculoskeletal diseases.
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Affiliation(s)
- Dennis J Wu
- Graduate Group in Immunology, University of California at Davis, United States; Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States
| | - Ran Gu
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States
| | - Ritu Sarin
- Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States
| | - Regina Zavodovskaya
- Department of Anatomy, Physiology and Cell Biology, University of California at Davis, United States
| | - Chia-Pei Chen
- Department of Statistics, University of California at Davis, United States
| | | | | | - Iannis E Adamopoulos
- Graduate Group in Immunology, University of California at Davis, United States; Division of Rheumatology, Allergy and Clinical Immunology, University of California at Davis, United States; Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children, Northern California, United States.
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13
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Abstract
During acute stroke care, rehabilitation usage may be influenced by patient- and hospital-related factors. We would like to identify patient- and hospital-level determinants of population-level inpatient rehabilitation usage associated with acute stroke care.From data obtained from the claim information from the National Health Insurance Administration (NHIA) in Taiwan (2009-2011), we enrolled 82,886 stroke patients with intracerebral hemorrhage and cerebral infarction from 207 hospitals. A generalized linear mixed model (GLMM) analyses with patient-level factors specified as random effects were conducted (for cross-level interactions).The rate of rehabilitation usage was 51% during acute stroke care. The hospital-related factors accounted for a significant amount of variability (intraclass correlation, 50%). Hospital type was the only significant hospital-level variable and can explain the large amount of variability (58%). Patients treated in smaller hospitals experienced few benefits of rehabilitation services, and those with surgery in a smaller hospital used fewer rehabilitation services. All patient-level variables were significant.With GLMM analyses, we identified the hospital type and its cross-level interaction, and explained a large portion of variability in rehabilitation for stroke patients in Taiwan.
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Affiliation(s)
- Tsung-Tai Chen
- From the Department of Public Health (TTC), School of Medicine (VW), College of Medicine, Fu-Jen Catholic University, and Neurological Center, Cardinal Tien Hospital, New Taipei City, Taiwan (VW), Medical Quality Management Center, Nursing Department, Cardinal Tien Hospital, and College of Nursing, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan (CPC), Medical Affairs Office, Cardinal Tien Hospital (SHK)
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14
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Lin YH, Chen CP, Chen PY, Huang JC, Ho C, Weng HH, Tsai YH, Peng YS. Screening for pulmonary tuberculosis in type 2 diabetes elderly: a cross-sectional study in a community hospital. BMC Public Health 2015; 15:3. [PMID: 25572102 PMCID: PMC4324855 DOI: 10.1186/1471-2458-15-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 12/09/2014] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Tuberculosis is one of the major infectious diseases in Taiwan. It has an especially high prevalence in diabetes patients, in whom it is usually asymptomatic and are more likely to result in drug-resistant tuberculosis. The aim of the study was to aggressively screen high risk diabetic elderly, identify the prevalence of tuberculosis and its determinants. METHODS Type 2 diabetes patients aged over 65 years were enrolled. They received chest X-rays, blood tests and the questionnaires to assess their medical history and symptoms. Suspicious cases were referred to the pulmonary or infectious disease outpatient clinics. Pulmonary tuberculosis was confirmed by sputum culture. Variables between groups were analyzed by Student t test, Chi-square test or Fisher's exact test. Risk factors were assessed using univariate logistic regression and multiple logistic regression. RESULTS A total of 3,087 patients participated this screening program and 7 patients screened positive for pulmonary tuberculosis. Another 5 patients were being under treatment when participating screening program. The prevalence rate was 3.89 per thousand people. The patients with male gender, smoking, liver cirrhosis or subjective body weight loss were associated with an increased risk of tuberculosis significantly. Subjective body weight loss (OR: 6.635 [95% CI: 2.096-21.007]), liver cirrhosis (OR: 10.307 [95% CI: 2.108-50.395]) and history of smoking (OR: 3.981 [95% CI: 1.246-12.718]) are independent risk factors. Among all 73 patients with active tuberculosis or tuberculosis history, they tended to be male, lower body mass index (BMI), more smoking history, more alcohol consumption, more family history of tuberculosis, higher low density lipoprotein (LDL), and less hypertension. However, there was no significant difference in the glycated hemoglobin (HbA1c) levels between the tuberculosis group and non-tuberculosis group. CONCLUSIONS Active screening program is helpful in detecting pulmonary tuberculosis in elderly diabetes patients. Subjective body weight loss, smoking and liver cirrhosis are independent risk factors.
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Affiliation(s)
- Yung-Hsiang Lin
- />Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, No.6, W. Sec., Jiapu Rd, Puzih City, Chiayi County 613 Taiwan
| | - Chia-Pei Chen
- />Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, No.6, W. Sec., Jiapu Rd, Puzih City, Chiayi County 613 Taiwan
| | - Pao-Ying Chen
- />Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, No.6, W. Sec., Jiapu Rd, Puzih City, Chiayi County 613 Taiwan
| | - Jui-Chu Huang
- />Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, No.6, W. Sec., Jiapu Rd, Puzih City, Chiayi County 613 Taiwan
| | - Cheng Ho
- />Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, No.6, W. Sec., Jiapu Rd, Puzih City, Chiayi County 613 Taiwan
| | - Hsu-Huei Weng
- />Department of Diagnostic Radiology, Chang Gung Memorial Hospital, Chiayi, Taiwan
- />Chang Gung University, College of Medicine, Tao-Yuan, Taiwan
| | - Ying-Huang Tsai
- />Division of Thoracic and Critical Care Medicine, Chang Gung Memorial Hospital, Chiayi, Taiwan
- />Chang Gung University, College of Medicine, Tao-Yuan, Taiwan
| | - Yun-Shing Peng
- />Division of Endocrinology and Metabolism, Department of Internal Medicine, Chang Gung Memorial Hospital, No.6, W. Sec., Jiapu Rd, Puzih City, Chiayi County 613 Taiwan
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15
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Chen CP, Fushing H, Atwill R, Koehl P. biDCG: a new method for discovering global features of DNA microarray data via an iterative re-clustering procedure. PLoS One 2014; 9:e102445. [PMID: 25047553 PMCID: PMC4105625 DOI: 10.1371/journal.pone.0102445] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 06/19/2014] [Indexed: 02/02/2023] Open
Abstract
Biclustering techniques have become very popular in cancer genetics studies, as they are tools that are expected to connect phenotypes to genotypes, i.e. to identify subgroups of cancer patients based on the fact that they share similar gene expression patterns as well as to identify subgroups of genes that are specific to these subtypes of cancer and therefore could serve as biomarkers. In this paper we propose a new approach for identifying such relationships or biclusters between patients and gene expression profiles. This method, named biDCG, rests on two key concepts. First, it uses a new clustering technique, DCG-tree [Fushing et al, PLos One, 8, e56259 (2013)] that generates ultrametric topological spaces that capture the geometries of both the patient data set and the gene data set. Second, it optimizes the definitions of bicluster membership through an iterative two-way reclustering procedure in which patients and genes are reclustered in turn, based respectively on subsets of genes and patients defined in the previous round. We have validated biDCG on simulated and real data. Based on the simulated data we have shown that biDCG compares favorably to other biclustering techniques applied to cancer genomics data. The results on the real data sets have shown that biDCG is able to retrieve relevant biological information.
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Affiliation(s)
- Chia-Pei Chen
- Department of Statistics, University of California Davis, Davis, California, United States of America
| | - Hsieh Fushing
- Department of Statistics, University of California Davis, Davis, California, United States of America
| | - Rob Atwill
- Department of Population, Health and Reproduction/Vet Med Extension, University of California Davis, Davis, California, United States of America
| | - Patrice Koehl
- Department of Computer Science and Genome Center, University of California Davis, Davis, California, United States of America
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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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Ding MF, Chen CP, Lin ST. Alumina as a Support and Catalyst for the Synthesis of Benzothiazoles in Solvent-free Condition. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201200413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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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, Peng YS, Weng HH, Fan JY, Guo SE, Yen HY, Tseng YF, Chen MY. Development and preliminary testing of a brief screening measure of healthy lifestyle for diabetes patients. Int J Nurs Stud 2012; 50:90-9. [PMID: 23010134 DOI: 10.1016/j.ijnurstu.2012.09.001] [Citation(s) in RCA: 8] [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: 03/17/2012] [Revised: 09/02/2012] [Accepted: 09/03/2012] [Indexed: 11/20/2022]
Abstract
OBJECTIVES Improving diabetes control is a critical issue world-wide, because mortality rates and costs are increasing dramatically. Maintaining a healthy lifestyle is positively associated with diabetes control. However, the availability of practical screening tools suitable for determining and modifying healthy or unhealthy lifestyle choices is limited. The main aim of this study was to determine the appropriateness of the type 2 diabetes and health promotion scale (T2DHPS) for use in patients with type 2 diabetes. METHODS This study examined the Cronbach's alpha, content validity, construct and concurrent validity of the Chinese language version of the T2DHPS for assessing lifestyle and disease control among patients with type 2 diabetes. The dimensions of the T2DHPS were generated from the Chinese version of adult health promotion and interviews with experts, and were corroborated by the literature. A total of 323 patients previously diagnosed with type 2 diabetes were recruited. A cross-sectional, descriptive design questionnaire was developed and tested at diabetes outpatient departments in three teaching hospitals between August 2010 and June 2011. Construct validity was established using factor analysis. The total and subscale scores of the T2DHPS were correlated with biomarkers of diabetes control for concurrent validity. RESULTS Kaiser-Meyer-Olkin (KMO) and Bartlett's sphericity tests showed that the sample met the criteria required for factor analysis. A 28-item Likert-type scale of the T2DHPS was established, and explained 56.7% of the total variance. The simplified version of the T2DHPS was made up of six dimensions of behavior: physical activity, risk reduction, stress-management, enjoy life, health responsibility and a healthy diet. The reliability coefficient for the total scale was 0.89, and alpha coefficients for the subscales ranged from 0.63 to 0.86. Concurrent validity indicated that the T2DHPS is significantly positively associated with diabetes control. CONCLUSIONS T2DHPS was shown to be a reliable and valid tool for assessing patients with type 2 diabetes, and can possibly predict diabetic control. This scale appears to be a useful screening tool for type 2 diabetic people in primary health care settings, to promote health status through modification of an unhealthy lifestyle.
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Lin YC, Chen HM, Chou IM, Chen AN, Chen CP, Young GH, Lin CT, Cheng CH, Chang SC, Juang RH. Plastidial starch phosphorylase in sweet potato roots is proteolytically modified by protein-protein interaction with the 20S proteasome. PLoS One 2012; 7:e35336. [PMID: 22506077 PMCID: PMC3323651 DOI: 10.1371/journal.pone.0035336] [Citation(s) in RCA: 12] [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: 08/02/2011] [Accepted: 03/15/2012] [Indexed: 01/27/2023] Open
Abstract
Post-translational regulation plays an important role in cellular metabolism. Earlier studies showed that the activity of plastidial starch phosphorylase (Pho1) may be regulated by proteolytic modification. During the purification of Pho1 from sweet potato roots, we observed an unknown high molecular weight complex (HX) showing Pho1 activity. The two-dimensional gel electrophoresis, mass spectrometry, and reverse immunoprecipitation analyses showed that HX is composed of Pho1 and the 20S proteasome. Incubating sweet potato roots at 45°C triggers a stepwise degradation of Pho1; however, the degradation process can be partially inhibited by specific proteasome inhibitor MG132. The proteolytically modified Pho1 displays a lower binding affinity toward glucose 1-phosphate and a reduced starch-synthesizing activity. This study suggests that the 20S proteasome interacts with Pho1 and is involved in the regulation of the catalytic activity of Pho1 in sweet potato roots under heat stress conditions.
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Affiliation(s)
- Yi-Chen Lin
- Department of Biochemical Science and Technology, and Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan
| | - Han-Min Chen
- Department of Life Science, and Institute of Applied Science and Engineering, Catholic Fu-Jen University, Taipei, Taiwan
| | - I-Min Chou
- Department of Biochemical Science and Technology, and Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan
| | - An-Na Chen
- Department of Biochemical Science and Technology, and Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan
| | - Chia-Pei Chen
- Department of Biochemical Science and Technology, and Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan
| | - Guang-Huar Young
- Division of Nephrology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chi-Tsai Lin
- Institute of Bioscience and Biotechnology, and Marine Center for Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - Chiung-Hsiang Cheng
- Animal Cancer Research Center, Department of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
| | - Shih-Chung Chang
- Department of Biochemical Science and Technology, and Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan
- * E-mail: (SCC); (RHJ)
| | - Rong-Huay Juang
- Department of Biochemical Science and Technology, and Institute of Microbiology and Biochemistry, National Taiwan University, Taipei, Taiwan
- * E-mail: (SCC); (RHJ)
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21
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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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22
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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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23
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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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24
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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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25
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Chen MY, Huang WC, Peng YS, Guo JS, Chen CP, Jong MC, Lin HC. Effectiveness of a health promotion programme for farmers and fishermen with type-2 diabetes in Taiwan. J Adv Nurs 2011; 67:2060-7. [DOI: 10.1111/j.1365-2648.2011.05678.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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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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27
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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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30
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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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31
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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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32
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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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33
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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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34
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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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35
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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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38
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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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40
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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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41
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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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42
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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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43
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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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44
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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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45
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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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