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Chang SC, Wu XR, Kuan HY, Peng SY, Chang CY. Using deep learning to accurately detect sow vulva size in a group pen with a single camera. J Anim Sci 2024; 102:skad407. [PMID: 38071666 PMCID: PMC10876038 DOI: 10.1093/jas/skad407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 12/07/2023] [Indexed: 02/20/2024] Open
Abstract
This paper presents a non-contact method for the detection of changes in sow vulva size in a group pen. The traditional approach to estrus detection is manually pressing down on the back of the sow to elicit standing responses; however, this method causes undue distress for sows not in estrus. When a sow is in estrus, the vulva is red and swollen due to the presence of endocrine. Monitoring changes in vulva size to detect estrus with as little impact on the sow as possible is the focus of this study. This is achieved using a single camera combined with a deep learning framework. Our approach comprises two steps: vulva detection and vulva size conversion. Images of sows of Yorkshire, Landrace, and Duroc breeds were collected in group housing, and the vulva was detected through artificial markers and the network architecture of YOLO v4. Based on the internal and external parameters of the camera, the detected size was converted into millimeters and the results of manual measurement (MM) and automatic calculation combined to calculate the size of the vulva. Analysis of the calculated size compared with MM indicates that the object recognition rate of the system exceeds 97.06%, with a size error of only + 1.70 to -4.47 mm and high-calculation efficiency (>2.8 frames/s). Directions for future research include the automatic detection of pig width.
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Affiliation(s)
- Shen-Chang Chang
- Southern Region Branch, Taiwan Livestock Research Institute, Ministry of Agriculture, Pingtung 91247, Taiwan
| | - Xin-Ru Wu
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Hao-Yuan Kuan
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Shao-Yu Peng
- Department of Animal Science, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
| | - Chia-Ying Chang
- Bachelor of Program in Scientific Agriculture, National Pingtung University of Science and Technology, Pingtung 91201, Taiwan
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Lin HY, Lee CL, Tu YR, Chang YH, Niu DM, Chang CY, Chiu PC, Chou YY, Hsiao HP, Tsai MC, Chao MC, Tsai LP, Yang CF, Su PH, Pan YW, Lee CH, Chu TH, Chuang CK, Lin SP. Quantitative DNA Methylation Analysis and Epigenotype-Phenotype Correlations in Taiwanese Patients with Silver-Russell Syndrome. Int J Med Sci 2024; 21:8-18. [PMID: 38164354 PMCID: PMC10750329 DOI: 10.7150/ijms.84154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 10/18/2023] [Indexed: 01/03/2024] Open
Abstract
Background: Silver-Russell syndrome (SRS; OMIM #180860) is a clinically and genetically heterogeneous imprinting disorder characterized by prenatal and postnatal growth failure. The aim of this study was to identify the epigenotype-phenotype correlations in these patients using quantitative DNA methylation analysis. Methods: One hundred and eighty-three subjects clinically suspected of having SRS were referred for diagnostic testing by the methylation profiling of H19-associated imprinting center (IC) 1 and imprinted PEG1/MEST regions using methylation-specific high-resolution melting analysis and methylation quantification with the MassARRAY assay. Correlations between quantitative DNA methylation status and clinical manifestations of the subjects according to the Netchine-Harbison (N-H) clinical scoring system for SRS were analyzed. Results: Among the 183 subjects, 90 had a clinical diagnosis of SRS [N-H score ≥ 4 (maximum = 6)] and 93 had an SRS score < 4. Molecular lesions were detected in 41% (37/90) of the subjects with a clinical diagnosis of SRS, compared with 3% (3/93) of those with an N-H score < 4. The IC1 methylation level was negatively correlated with the N-H score. The molecular diagnosis rate was positively correlated with the N-H score. Thirty-one subjects had IC1 hypomethylation (IC1 methylation level <35% by the MassARRAY assay), seven had maternal uniparental disomy 7, and two had pathogenic copy number variants. Among the 90 subjects with an N-H score ≥ 4, the IC1 methylation level was significantly different between those with or without some clinical SRS features, including birth length ≤ 10th centile, relative macrocephaly at birth, normal cognitive development, body asymmetry, clinodactyly of the fifth finger, and genital abnormalities. Conclusions: This study confirmed the suitability of the N-H clinical scoring system as clinical diagnostic criteria for SRS. Quantitative DNA methylation analysis using the MassARRAY assay can improve the detection of epigenotype-phenotype correlations, further promoting better genetic counseling and multidisciplinary management for these patients.
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Affiliation(s)
- Hsiang-Yu Lin
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan
- Department of Pediatrics, MacKay Memorial Hospital, Taipei, Taiwan
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
- MacKay Junior College of Medicine, Nursing and Management, Taipei, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei, Taiwan
| | - Chung-Lin Lee
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan
- Department of Pediatrics, MacKay Memorial Hospital, Taipei, Taiwan
- MacKay Junior College of Medicine, Nursing and Management, Taipei, Taiwan
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei, Taiwan
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
- Institute of Clinical Medicine, National Yang-Ming Chiao Tung University, Taipei, Taiwan
| | - Yuan-Rong Tu
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
| | - Ya-Hui Chang
- Department of Pediatrics, MacKay Memorial Hospital, Taipei, Taiwan
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei, Taiwan
| | - Dau-Ming Niu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
- Institute of Clinical Medicine, National Yang-Ming Chiao Tung University, Taipei, Taiwan
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chia-Ying Chang
- Department of Pediatrics, MacKay Memorial Hospital, Hsinchu, Taiwan
| | - Pao Chin Chiu
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Yen-Yin Chou
- Department of Pediatrics, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Hui-Pin Hsiao
- Department of Pediatrics, Kaohsiung Medical University Chung Ho Memorial Hospital, Kaohsiung, Taiwan
| | - Meng-Che Tsai
- Department of Pediatrics, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Mei-Chyn Chao
- Department of Pediatrics, Changhua Christian Children's Hospital, Changhua, Taiwan
| | - Li-Ping Tsai
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City, Taiwan
| | - Chia-Feng Yang
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Pen-Hua Su
- Department of Pediatrics, Chung Shan Medical University, Taichung, Taiwan
| | - Yu-Wen Pan
- Department of Pediatrics, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Chen-Hao Lee
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Tzu-Hung Chu
- Department of Pediatrics, China Medical University Hsinchu Hospital, Taiwan
| | - Chih-Kuang Chuang
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
- College of Medicine, Fu-Jen Catholic University, Taipei, Taiwan
| | - Shuan-Pei Lin
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan
- Department of Pediatrics, MacKay Memorial Hospital, Taipei, Taiwan
- Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
- Department of Rare Disease Center, MacKay Memorial Hospital, Taipei, Taiwan
- Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
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3
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Tan KT, Benedict SLH, Chang CY, Chidambaram SK, Abd Jamil I, Bahrudin MS, Kandasamy SS, Khor CS. Clinical severity of COVID-19 with omicron variant predominance in relation to vaccination status, age, comorbidities- a single center in Selangor, Malaysia. Med J Malaysia 2022; 77:558-563. [PMID: 36169066] [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: 06/16/2023]
Abstract
INTRODUCTION Recently, the rapid surge of reported COVID-19 cases attributed to the Omicron variant of severe acute respiratory syndrome coronavirus (SARS-CoV-2) created an immediate concern across nations. Local information pertaining to the new variant of concern (VOC) is lacking. We aimed to determine the clinical characteristics of COVID-19 during a period of Omicron prevalence among patients hospitalised from February 1 to 21, 2022 at Sungai Buloh Hospital and to estimate the risks of disease progression presumably caused by this variant in association with gender, age, comorbidity, and vaccination status. MATERIALS AND METHODS In this retrospective, singlecentered, retrospective cohort study, all hospitalised adults with laboratory-confirmed COVID-19, aged 18 and above, were recruited from February 1 to 21, 2022. Clinical characteristics, investigations, and outcomes were assessed. RESULTS A total of 2279 patients aged 18 years and above with laboratory-proven COVID-19 were recruited and analysed, excluding 32 patients owing to incomplete data. Majority of the study population had a mean age of 41.8 ± 17.7, was female-predominant (1329/2279, 58.6%), had completed a primary series of vaccination with a booster (1103/2279, 48.4%), and had no underlying medical conditions (1529/2279, 67.4%). The risk of COVID-19-related disease progression was significantly lower in hospitalised patients under the age of 50 who were female, had no comorbidity, and had completed two doses of the primary series with or without a booster. [respectively, OR 7.94 (95% CI 6.16, 10.23); 1.68 (1.34, 2,12); 2.44 (1.85, 3.22); 2.56 (1.65, 3.97), p< 0.001]. CONCLUSION During the period of Omicron prevalence, a favourable outcome of COVID-19 was strongly associated with female gender, age below 50, a comorbidity-free condition, and having completed immunization. With this new observation, it could help improve public health planning and clinical management in response to the emergence of the latest VOC.
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Affiliation(s)
- K T Tan
- Sungai Buloh Hospital, Department of Internal Medicine, Selangor, Malaysia.
| | - S L H Benedict
- Sungai Buloh Hospital, Department of Internal Medicine, Selangor, Malaysia
| | - C Y Chang
- Sungai Buloh Hospital, Department of Internal Medicine, Selangor, Malaysia
| | - S K Chidambaram
- Sungai Buloh Hospital, Department of Internal Medicine, Selangor, Malaysia
| | - I Abd Jamil
- Sungai Buloh Hospital, Department of Crisis Preparedness and Response Centre, Selangor, Malaysia
| | - M S Bahrudin
- Sungai Buloh Hospital, Department of Crisis Preparedness and Response Centre, Selangor, Malaysia
| | - S S Kandasamy
- Sungai Buloh Hospital, Department of Internal Medicine, Selangor, Malaysia
| | - C S Khor
- Sungai Buloh Hospital, Department of Internal Medicine, Selangor, Malaysia
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Chuang YC, Peng FS, Tu FC, Chang CY, Lin TY. An intracardiac thrombus as a cause of cardiac arrest during a cesarean delivery. Am J Obstet Gynecol 2022; 227:324-326. [PMID: 35487328 DOI: 10.1016/j.ajog.2022.04.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 11/01/2022]
Affiliation(s)
| | | | - Fung-Chao Tu
- Far Eastern Memorial Hospital, New Taipei, Taiwan
| | | | - Tzu-Yu Lin
- Far Eastern Memorial Hospital, New Taipei, Taiwan.
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Chang CY, Chin HH, Chin PW, Zaid M. Cold agglutinin-mediated autoimmune haemolytic anaemia associated with COVID-19 infection: a case report. Hong Kong Med J 2022; 28:257-259. [PMID: 35485209 DOI: 10.12809/hkmj219828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- C Y Chang
- Department of Medicine, Hospital Sultanah Aminah, Johor Bahru, Johor, Malaysia
| | - H H Chin
- Department of Medicine, Hospital Enche' Besar Hajjah Kalsom, Kluang, Johor, Malaysia
| | - P W Chin
- Department of Medicine, Hospital Enche' Besar Hajjah Kalsom, Kluang, Johor, Malaysia
| | - M Zaid
- Department of Medicine, Hospital Sultanah Aminah, Johor Bahru, Johor, Malaysia
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6
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Chang CY, Gan YL, Lio JY, Radhakrishnan AP. Invasive salmonella enteritidis infection complicated by colonic perforations and pancytopenia: A case report. Med J Malaysia 2022; 77:264-266. [PMID: 35338642] [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: 06/14/2023]
Abstract
Salmonellosis caused by bacterial genus Salmonella is associated with a high morbidity and mortality rate. Salmonellae can be divided into typhoidal serotypes (S. enterica ser. Typhi and S. enterica ser. Paratyphi A) and nontyphoidal Salmonella (NTS) serotypes. The two most common NTS serotypes isolated from human sources were S. enterica ser. Typhimurium and S. enterica ser. Enteritidis. NTS infection can present with diverse clinical manifestations, including gastroenteritis, bacteraemia, septic arthritis, osteomyelitis, and endovascular infection. Intestinal perforation is an extremely rare and potentially fatal complication of severe salmonella infection. Herein, we report a case of invasive S. Enteritidis infection complicated by colonic perforation and pancytopenia. Following a colonic resection, the patient received a prolonged course of antimicrobial therapy and eventually recovered.
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Affiliation(s)
- C Y Chang
- Hospital Selayang, Medical Department, Batu Caves, Selangor, Malaysia.
| | - Y L Gan
- Hospital Selayang, Medical Department, Batu Caves, Selangor, Malaysia
| | - J Y Lio
- Hospital Selayang, Medical Department, Batu Caves, Selangor, Malaysia
| | - A P Radhakrishnan
- Hospital Selayang, Medical Department, Batu Caves, Selangor, Malaysia
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7
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Affiliation(s)
- C Y Chang
- Medical Department, Hospital Selayang, Selayang-Kepong Highway, 68100 Batu Caves, Selangor, Malaysia
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8
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Chang CY, Hsu WH, Ho CH, Lin TY. Incidental finding of severe hyperkalemia in a patient with end-stage renal disease during video-assisted lung lobectomy: A case report. Saudi J Anaesth 2022; 16:494-496. [DOI: 10.4103/sja.sja_274_22] [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] [Received: 04/01/2022] [Revised: 04/30/2022] [Indexed: 11/04/2022] Open
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Chen CH, Nair AV, Chuang SC, Lin YS, Cheng MH, Lin CY, Chang CY, Chen SJ, Lien CH. Dual-LC PSHG microscopy for imaging collagen type I and type II gels with pixel-resolution analysis. Biomed Opt Express 2021; 12:3050-3065. [PMID: 34168914 PMCID: PMC8194623 DOI: 10.1364/boe.416193] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/18/2021] [Accepted: 04/07/2021] [Indexed: 05/27/2023]
Abstract
Collagen of type I (Col I) and type II (Col II) are critical for cartilage and connective tissues in the human body, and several diseases may alter their properties. Assessing the identification and quantification of fibrillar collagen without biomarkers is a challenge. Advancements in non-invasive polarization-resolved second-harmonic generation (PSHG) microscopy have provided a method for the non-destructive investigation of collagen molecular level properties. Here we explored an alternative polarization modulated approach, dual-LC PSHG, that is based on two liquid crystal devices (Liquid crystal polarization rotators, LPRs) operating simultaneously with a laser scanning SHG microscope. We demonstrated that this more accessible technology allows the quick and accurate generation of any desired linear and circular polarization state without any mechanical parts. This study demonstrates that this method can aid in improving the ability to quantify the characteristics of both types of collagen, including pitch angle, anisotropy, and circular dichroism analysis. Using this approach, we estimated the effective pitch angle for Col I and Col II to be 49.7° and 51.6°, respectively. The effective peptide pitch angle for Col II gel was first estimated and is similar to the value obtained for Col I gel in the previous studies. Additionally, the difference of the anisotropy parameter of both collagen type gels was assessed to be 0.293, which reflects the different type molecular fibril assembly. Further, our work suggests a potential method for monitoring and differentiating different collagen types in biological tissues, especially cartilage or connective tissue.
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Affiliation(s)
- Chung-Hwan Chen
- Orthopaedic Research Centre, Kaohsiung Medical University, Kaohsiung, Taiwan
- Regeneration Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
- Departments of Orthopedics, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Division of Adult Reconstruction Surgery, Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | | | - Shu-Chun Chuang
- Orthopaedic Research Centre, Kaohsiung Medical University, Kaohsiung, Taiwan
- Regeneration Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Shan Lin
- Orthopaedic Research Centre, Kaohsiung Medical University, Kaohsiung, Taiwan
- Regeneration Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Mei-Hsin Cheng
- Orthopaedic Research Centre, Kaohsiung Medical University, Kaohsiung, Taiwan
- Regeneration Medicine and Cell Therapy Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Yu Lin
- College of Photonics, National Chiao Tung University, Tainan, Taiwan
| | - Chia-Ying Chang
- College of Photonics, National Chiao Tung University, Tainan, Taiwan
| | - Shean-Jen Chen
- College of Photonics, National Chiao Tung University, Tainan, Taiwan
| | - Chi-Hsiang Lien
- Department of Mechanical Engineering, National United University, Miaoli, Taiwan
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Chang CY. Peripheral T-cell lymphoma presenting with pleural effusion. QJM 2021; 114:55. [PMID: 32330273 DOI: 10.1093/qjmed/hcaa140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- C Y Chang
- Department of General Medicine, Kapit Hospital, Jalan Mamora, Kapit, Sarawak 96800, Malaysia
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Shiue A, Chen JH, Chang CY, Chang SM, Hwa KY, Chin KY, Leggett G. Synthesis and cytotoxic analysis of thiolated xylose derivatives decorated on gold nanoparticles. ACTA ACUST UNITED AC 2020; 28:e00549. [PMID: 33240795 PMCID: PMC7674290 DOI: 10.1016/j.btre.2020.e00549] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/20/2020] [Accepted: 10/29/2020] [Indexed: 11/29/2022]
Abstract
Nanoparticles covered with carbohydrates constitute a good bio-mimetic model. D-xylose gold nanoparticles with linkages of alkyl or polyethylene glycol synthesized via D-xylosethiols. Forming self-assembled monolayers on gold nanoparticles. The potential use of intact or thiolated xylose derivatives decorated on AuNPs.
The rapid development of metal nanoparticles capped by an organic monolayer offers the possibility to create a whole new variety of products with novel characteristic, functions and applications. Among these, nanoparticles covered with carbohydrates (glyconanoparticles) constitute a good bio-mimetic model of carbohydrate presentation at the cell surface and are currently centered on many glycobiological and biomedical applications. In this study, a series of novel D-xylose gold nanoparticles (AuNPs) with linkages of alkyl or polyethylene glycol have been synthesized via D-xylosethiols, forming self-assembled monolayers on gold nanoparticles. The nano-gold solution, two carbohydrate derivatives and modified nano-gold solution were tested for cytotoxicity to check the biocompatibility. The MTT assay on NIH 3T3 cell lines confirmed that all the test materials showed no toxicity with the more than 90 % of cell viability in both low concentration (1 μM) and high concentration (100 μM), compared with the control.
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Affiliation(s)
- Angus Shiue
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan
| | - Jenn-Han Chen
- Graduate Institute of Clinical Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chia-Ying Chang
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan
| | - Shu-Mei Chang
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan.,Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan.,Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei, Taiwan
| | - Kuo-Yuan Hwa
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan.,Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei, Taiwan.,Center for Biomedical Industry, National Taipei University of Technology, Taipei, Taiwan
| | - Kai-Yen Chin
- Graduate Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan
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Lin HY, Lee CL, Chang CY, Chiu PC, Chien YH, Niu DM, Tsai FJ, Hwu WL, Lin SJ, Lin JL, Chao MC, Chang TM, Tsai WH, Wang TJ, Chuang CK, Lin SP. Survival and diagnostic age of 175 Taiwanese patients with mucopolysaccharidoses (1985-2019). Orphanet J Rare Dis 2020; 15:314. [PMID: 33160388 PMCID: PMC7648385 DOI: 10.1186/s13023-020-01598-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 06/05/2020] [Accepted: 10/26/2020] [Indexed: 01/03/2023] Open
Abstract
Background Mucopolysaccharidoses (MPSs) are a group of inherited metabolic diseases, which are characterized by the accumulation of glycosaminoglycans, and eventually lead to the progressive damage of various tissues and organs. Methods An epidemiological study of MPS in Taiwan was performed using multiple sources. The survival and diagnostic age for different types of MPS between 1985 and 2019 were evaluated.
Results Between 1985 and 2019, there were 175 patients diagnosed with MPS disorders in the Taiwanese population, with a median diagnostic age of 3.9 years. There were 21 (12%), 78 (45%), 33 (19%), 32 (18%) and 11 (6%) patients diagnosed with MPS I, II, III, IV and VI, respectively, with median diagnostic ages of 1.5, 3.8, 4.7, 4.5 and 3.7 years, respectively. Diagnosis of MPS patients was significantly earlier in recent decades (p < 0.01). Pilot newborn screening programs for MPS I, II, VI, IVA, and IIIB were progressively introduced in Taiwan from 2016, and 48% (16/33) of MPS patients diagnosed between 2016 and 2019 were diagnosed by one of these screening programs, with a median diagnostic age at 0.2 years. For patients born between 2016 and 2019, up to 94% (16/17) were diagnosed with MPS via the newborn screening programs. At the time of this study, 81 patients had passed away with a median age at death of 15.6 years. Age at diagnosis was positively correlated with life expectancy (p < 0.01). Life expectancy also significantly increased between 1985 and 2019, however this increase was gradual (p < 0.01). Conclusions The life expectancy of Taiwanese patients with MPS has improved in recent decades and patients are being diagnosed earlier. Because of the progressive nature of the disease, early diagnosis by newborn screening programs and timely implementation of early therapeutic interventions may lead to better clinical outcomes.
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Affiliation(s)
- Hsiang-Yu Lin
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan.,Department of Pediatrics, MacKay Memorial Hospital, No.92, Sec. 2 Chung-Shan North Road, Taipei, 10449, Taiwan.,Department of Medical Research, MacKay Memorial Hospital, 92 Chung-Shan N. Rd., Sec. 2, Taipei, 10449, Taiwan.,Nursing and Management, MacKay Junior College of Medicine, Taipei, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.,Institute of Biomedical Sciences, MacKay Medical College, New Taipei City, Taiwan
| | - Chung-Lin Lee
- Nursing and Management, MacKay Junior College of Medicine, Taipei, Taiwan.,Department of Pediatrics, MacKay Memorial Hospital, Hsinchu, Taiwan.,Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chia-Ying Chang
- Department of Pediatrics, MacKay Memorial Hospital, Hsinchu, Taiwan
| | - Pao Chin Chiu
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Yin-Hsiu Chien
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Dau-Ming Niu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Fuu-Jen Tsai
- Department of Pediatrics, China Medical University Hospital, Taichung, Taiwan
| | - Wuh-Liang Hwu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Shio Jean Lin
- Department of Pediatrics, Chi Mei Medical Center, Tainan, Taiwan
| | - Ju-Li Lin
- Department of Pediatrics, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan
| | - Mei-Chyn Chao
- Department of Pediatrics, Changhua Christian Children's Hospital, Changhua, Taiwan
| | - Tung-Ming Chang
- Department of Pediatric Neurology, Changhua Christian Children's Hospital, Changhua, Taiwan.,School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Wen-Hui Tsai
- Department of Pediatrics, Chi Mei Medical Center, Tainan, Taiwan
| | - Tzu-Jou Wang
- Department of Pediatrics, Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Chih-Kuang Chuang
- Department of Medical Research, MacKay Memorial Hospital, 92 Chung-Shan N. Rd., Sec. 2, Taipei, 10449, Taiwan. .,College of Medicine, Fu-Jen Catholic University, Taipei, Taiwan.
| | - Shuan-Pei Lin
- Department of Medicine, MacKay Medical College, New Taipei City, Taiwan. .,Department of Pediatrics, MacKay Memorial Hospital, No.92, Sec. 2 Chung-Shan North Road, Taipei, 10449, Taiwan. .,Department of Medical Research, MacKay Memorial Hospital, 92 Chung-Shan N. Rd., Sec. 2, Taipei, 10449, Taiwan. .,Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan.
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Chang CY, Husseini JS, Moreira A, Simeone FJ, Yee AJ, Bredella MA, Hasserjian R. CT-guided bone marrow aspirations and biopsies: retrospective study and comparison with blind procedures. Skeletal Radiol 2020; 49:1285-1294. [PMID: 32232499 DOI: 10.1007/s00256-020-03423-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Revised: 03/14/2020] [Accepted: 03/16/2020] [Indexed: 02/02/2023]
Abstract
PURPOSE To compare the pathology results of CT-guided and blind bone marrow aspirations and biopsies. METHODS Ninety-eight consecutive CT-guided biopsies and 98 age- and gender-matched blind (non-CT-guided) posterior iliac crest bone marrow aspirations and biopsies performed in 2017 were reviewed for adequacy of core biopsies and aspirate smears. CT procedure images and CT abdomen/pelvis images were reviewed to evaluate anatomic features of the posterior ilium and soft tissues. Statistical analysis was performed using a T test, Fisher exact test, and Kruskal-Wallis test. RESULTS There was no significant difference in the age and gender of the two groups (p > 0.05). However, the CT-guided group had a higher BMI (p = 0.0049) and posterior soft tissue thickness (p = 0.0016). More CT-guided biopsy samples (CT 93 (95%); blind 77 (79%); p = 0.0006) and aspirate smears (CT 90 (92%); blind 78 (80%); p = 0.042) were categorized as adequate. The CT-guided group had longer core lengths (CT 1.4 ± 0.6 (range 0.3-3.5) cm; blind 1.0 ± 0.60 (range 0-2.6) cm; p = 0.0001). Overall, 131/164 (80%) of the cases had at least one of the described features (slanted posterior ilium (angle > 30°), 30%; rounded posterior ilium, 20%; thick posterior ilium cortex, 13%; focal lesion in posterior ilium, 12%; prior procedure in posterior ilium, 5%; posterior soft tissue thickness > 3 cm, 40%). CONCLUSION CT-guided bone marrow procedures were more likely to result in both adequate aspirate smears and biopsy samples and longer core lengths when compared with blind procedures.
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Affiliation(s)
- C Y Chang
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA. .,Harvard Medical School, Cambridge, MA, USA.
| | - J S Husseini
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA.,Harvard Medical School, Cambridge, MA, USA
| | - A Moreira
- Department of Radiology, Centro Hospitalar São João, Porto, Portugal
| | - F J Simeone
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA
| | - A J Yee
- Harvard Medical School, Cambridge, MA, USA.,Division of Hematology and Oncology, Massachusetts General Hospital, Boston, MA, USA
| | - M A Bredella
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, Boston, MA, USA.,Harvard Medical School, Cambridge, MA, USA
| | - R Hasserjian
- Harvard Medical School, Cambridge, MA, USA.,Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
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14
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Lin HY, Lee CL, Lo YT, Tu RY, Chang YH, Chang CY, Chiu PC, Chang TM, Tsai WH, Niu DM, Chuang CK, Lin SP. An At-Risk Population Screening Program for Mucopolysaccharidoses by Measuring Urinary Glycosaminoglycans in Taiwan. Diagnostics (Basel) 2019; 9:diagnostics9040140. [PMID: 31590383 PMCID: PMC6963841 DOI: 10.3390/diagnostics9040140] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 09/16/2019] [Revised: 10/02/2019] [Accepted: 10/02/2019] [Indexed: 01/13/2023] Open
Abstract
Background: The mucopolysaccharidoses (MPSs) are a group of rare lysosomal storage disorders characterized by the accumulation of glycosaminoglycans (GAGs) and which eventually cause progressive damage to various tissues and organs. We developed a feasible MPS screening algorithm and established a cross-specialty collaboration platform between medical geneticists and other medical specialists based on at-risk criteria to allow for an earlier confirmative diagnosis of MPS. Methods: Children (<19 years of age) with clinical signs and symptoms compatible with MPS were prospectively enrolled from pediatric clinics between July 2013 and June 2018. Urine samples were collected for a non-specific total GAG analysis using the dimethylmethylene blue (DMB) spectrophotometric method, and the quantitation of three urinary GAGs (dermatan sulfate (DS), heparan sulfate (HS), and keratan sulfate (KS)) was performed by liquid chromatography/tandem mass spectrometry (LC-MS/MS). The subjects with elevated urinary GAG levels were recalled for leukocyte enzyme activity assay and genetic testing for confirmation. Results: Among 153 subjects enrolled in this study, 13 had a confirmative diagnosis of MPS (age range, 0.6 to 10.9 years—three with MPS I, four with MPS II, five with MPS IIIB, and one with MPS IVA). The major signs and symptoms with regards to different systems recorded by pediatricians at the time of the decision to test for MPS were the musculoskeletal system (55%), followed by the neurological system (45%) and coarse facial features (39%). For these 13 patients, the median age at the diagnosis of MPS was 2.9 years. The false negative rate of urinary DMB ratio using the dye-based method for these 13 patients was 31%, including one MPS I, two MPS IIIB, and one MPS IVA. However, there were no false negative results with urinary DS, HS and KS using the MS/MS-based method. Conclusions: We established an at-risk population screening program for MPS by measuring urinary GAG fractionation biomarkers using the LC-MS/MS method. The program included medical geneticists and other medical specialists to increase awareness and enable an early diagnosis by detecting MPS at the initial onset of clinical symptoms.
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Affiliation(s)
- Hsiang-Yu Lin
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan.
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 100, Taiwan.
- Department of Medical Research, MacKay Memorial Hospital, Taipei 100, Taiwan.
- MacKay Junior College of Medicine, Nursing and Management, Taipei 100, Taiwan.
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung 400, Taiwan.
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City 252, Taiwan.
| | - Chung-Lin Lee
- Department of Pediatrics, MacKay Memorial Hospital, Hsinchu 300, Taiwan.
- Institute of Clinical Medicine, National Yang-Ming University, Taipei 100, Taiwan.
| | - Yun-Ting Lo
- Department of Laboratory Medicine, MacKay Memorial Hospital, Taipei 100, Taiwan.
| | - Ru-Yi Tu
- Department of Medical Research, MacKay Memorial Hospital, Taipei 100, Taiwan.
| | - Ya-Hui Chang
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 100, Taiwan.
| | - Chia-Ying Chang
- Department of Pediatrics, MacKay Memorial Hospital, Hsinchu 300, Taiwan.
| | - Pao Chin Chiu
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung 800, Taiwan.
| | - Tung-Ming Chang
- Department of Pediatric Neurology, Changhua Christian Children's Hospital, Changhua 500, Taiwan.
- Department of Biological Science and Technology, College of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan.
| | - Wen-Hui Tsai
- Department of Pediatrics, Chi Mei Medical Center, Tainan 700, Taiwan.
| | - Dau-Ming Niu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei 100, Taiwan.
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei 100, Taiwan.
| | - Chih-Kuang Chuang
- Department of Medical Research, MacKay Memorial Hospital, Taipei 100, Taiwan.
- College of Medicine, Fu-Jen Catholic University, Taipei 100, Taiwan.
| | - Shuan-Pei Lin
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan.
- Department of Pediatrics, MacKay Memorial Hospital, Taipei 100, Taiwan.
- Department of Medical Research, MacKay Memorial Hospital, Taipei 100, Taiwan.
- Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei 100, Taiwan.
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15
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Lee CL, Lin HY, Chuang CK, Chiu HC, Tu RY, Huang YH, Hwu WL, Tsai FJ, Chiu PC, Niu DM, Chen YJ, Chao MC, Chang TM, Lin JL, Chang CY, Kao YC, Lin SP. Functional independence of Taiwanese patients with mucopolysaccharidoses. Mol Genet Genomic Med 2019; 7:e790. [PMID: 31215158 PMCID: PMC6687640 DOI: 10.1002/mgg3.790] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 05/05/2019] [Accepted: 05/17/2019] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Information on functional strengths and weaknesses of mucopolysaccharidosis (MPS) patients is important for early intervention programs and enzyme replacement therapy (ERT). METHODS We used the Functional Independence Measure for Children (WeeFIM) questionnaire to assess the functional skills of 63 Taiwanese MPS patients (median age, 13 years 3 months; range, 3-20 years) from January 2012 to December 2018. RESULTS Mean total WeeFIM score was 75.4 of a potential score of 126. Mean total WeeFIM scores of each type (MPS I, MPS II, MPS IIIB, MPS IVA, and MPS VI) were 103.8, 76.2, 41.6, 92.2, and 113.6, respectively. Mean scores for self-care, mobility, and cognition domains were 30 (maximum 56), 23 (maximum 35), and 22 (maximum 35), respectively. MPS type IIIB patients had the lowest scores in self-care, mobility, cognition, and total domains compared to other types of MPS. All patients with ERT in MPS I, II, and IVA had higher scores in self-care and mobility domains than patients without ERT. Most patients required assistance for self-care skills, especially in grooming and bathing. CONCLUSION MPS patients require support and supervision in self-care tasks. For cognition tasks, MPS IIIB patients also require help. This questionnaire is useful to identify the strengths and limitations of MPS patients.
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Affiliation(s)
- Chung-Lin Lee
- Department of Pediatrics, Mackay Memorial Hospital, Hsinchu, Taiwan
| | - Hsiang-Yu Lin
- Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan.,Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.,Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan.,Mackay Junior College of Medicine, Nursing and Management, Taipei, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
| | - Chih-Kuang Chuang
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan.,College of Medicine, Fu-Jen Catholic University, Taipei, Taiwan
| | - Huei-Ching Chiu
- Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan
| | - Ru-Yi Tu
- Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan
| | - You-Hsin Huang
- Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan
| | - Wuh-Liang Hwu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Fuu-Jen Tsai
- Department of Medical Research, Genetics Center, China Medical University Hospital, Taichung, Taiwan
| | - Pao-Chin Chiu
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Dau-Ming Niu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Yann-Jang Chen
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan.,Department of Pediatrics, Renai Branch, Taipei City Hospital, Taipei, Taiwan
| | - Mei-Chyn Chao
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Department of Pediatric Neurology, Changhua Christian Children's Hospital, Changhua, Taiwan
| | - Tung-Ming Chang
- Department of Pediatric Neurology, Changhua Christian Children's Hospital, Changhua, Taiwan.,Department of Biological Science and Technology, College of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Ju-Li Lin
- Department of Pediatrics, Chang-Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chia-Ying Chang
- Department of Pediatrics, Mackay Memorial Hospital, Hsinchu, Taiwan
| | - Yu-Chia Kao
- Department of Pediatrics, E-DA Hospital, Kaohsiung, Taiwan
| | - Shuan-Pei Lin
- Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan.,Department of Medicine, Mackay Medical College, New Taipei City, Taiwan.,Division of Genetics and Metabolism, Department of Medical Research, MacKay Memorial Hospital, Taipei, Taiwan.,Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
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16
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Chang CY, Abujaber S, Pany MJ, Obermeyer Z. Are vital sign abnormalities associated with poor outcomes after emergency department discharge? Acute Med 2019; 18:88-95. [PMID: 31127797] [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: 06/09/2023]
Abstract
To examine association between vital sign abnormalities in the emergency department (ED) and early death after ED discharge, we performed a matched case-control study. Conditional logistic regression showed that presence of any vital sign abnormality at ED discharge was significantly associated with over three-fold increase in likelihood of death within 15 days of ED discharge (OR: 3.06, 95%CI: 2.81-4.48). Even small changes were associated with increased risk: every additional beat increase in heart rate conferred additional risk (OR: 1.04, 95%CI: 1.02-1.06), while every additional oxygen saturation percentage point was protective (0.89, 0.80-0.98). However, none of these vital sign abnormalities was a good predictor of early death; there was poor discrimination and substantial overlap in values between cases and controls.
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Affiliation(s)
- C Y Chang
- Department of Emergency Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - S Abujaber
- Department of Emergency Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - M J Pany
- Department of Emergency Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Z Obermeyer
- Department of Emergency Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
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17
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Chang CY, Yuan FG. Extraction of guided wave dispersion curve in isotropic and anisotropic materials by Matrix Pencil method. Ultrasonics 2018; 89:143-154. [PMID: 29803979 DOI: 10.1016/j.ultras.2018.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 05/07/2018] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
Guided wave dispersion curves in isotropic and anisotropic materials are extracted automatically from measured data by Matrix Pencil (MP) method investigating through k-t or x-ω domain with a broadband signal. A piezoelectric wafer emits a broadband excitation, linear chirp signal to generate guided waves in the plate. The propagating waves are measured at discrete locations along the lines for one-dimensional laser Doppler vibrometer (1-D LDV). Measurements are first Fourier transformed into either wavenumber-time k-t domain or space-frequency x-ω domain. MP method is then employed to extract the dispersion curves explicitly associated with different wave modes. In addition, the phase and group velocity are deduced by the relations between wavenumbers and frequencies. In this research, the inspections for dispersion relations on an aluminum plate by MP method from k-t or x-ω domain are demonstrated and compared with two-dimensional Fourier transform (2-D FFT). Other experiments on a thicker aluminum plate for higher modes and a composite plate are analyzed by MP method. Extracted relations of composite plate are confirmed by three-dimensional (3-D) theoretical curves computed numerically. The results explain that the MP method not only shows more accuracy for distinguishing the dispersion curves on isotropic material, but also obtains good agreements with theoretical curves on anisotropic and laminated materials.
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Affiliation(s)
- C Y Chang
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, United States; Integrated System Health Management Laboratory ISHM, National Institute of Aerospace, 100 Exploration Way, Hampton, VA 23666, United States
| | - F G Yuan
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC 27695, United States; Integrated System Health Management Laboratory ISHM, National Institute of Aerospace, 100 Exploration Way, Hampton, VA 23666, United States.
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18
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Fan CC, Chiu YC, Liu C, Lai WW, Cheng CH, Lin DL, Li GR, Lo YH, Chang CW, Tsai CC, Chang CY. The Impact of the Shallow-Trench Isolation Effect on Flicker Noise of Source Follower MOSFETs in a CMOS Image Sensor. J Nanosci Nanotechnol 2018; 18:4217-4221. [PMID: 29442765 DOI: 10.1166/jnn.2018.15239] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The flicker noise of source follower transistors is the dominant noise source in image sensors. This paper reports a systematic study of the shallow trench isolation effect in transistors with different sizes under high temperature conditions that correspond to the quantity of empty defect sites. The effects of shallow trench isolation sidewall defects on flicker noise characteristics are investigated. In addition, the low-frequency noise and subthreshold swing degrade simultaneously in accordance to the device gate width scaling. Both serious subthreshold leakage and considerable noise can be attributed to the high trap density near the STI edge. Consequently, we propose a coincidental relationship between the noise level and the subthreshold characteristic; its trend is identical to the experiments and simulation results.
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Affiliation(s)
- C C Fan
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - Y C Chiu
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - C Liu
- Department of Electro-Physics, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - W W Lai
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
| | - C H Cheng
- Department of Mechatronic Engineering, National Taiwan Normal University, Taipei, 106, Taiwan
| | - D L Lin
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - G R Li
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - Y H Lo
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - C W Chang
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - C C Tsai
- Himax Technologies, Inc., Tainan City 74148, Taiwan
| | - C Y Chang
- Department of Electronics Engineering, National Chiao Tung University, Hsinchu City 30010, Taiwan
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19
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Ohshio G, Yamaki K, Imamura T, Suwa H, Chang CY, Wada H, Sueno Y, Imamura M. Distribution of the Carbohydrate Antigens, Du-Pan-2 and Ca19-9, in Tumors of the Lung. Tumori 2018; 81:67-73. [PMID: 7754546 DOI: 10.1177/030089169508100116] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [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: 11/15/2022]
Abstract
Aims and background The carbohydrate chains of malignant cells appear to be related to oncofetal differentiation. The serum levels of CA19-9 have been reported to be evaluated in some patients with lung carcinomas, however, the distribution of carbohydrate antigens were not precisely described. We have investigated in this study the distribution of DU-PAN-2 and CA19-9 antigens in lung tumors. Methods Ninety five specimens of lung tumors were selected from surgical specimens. The expression of DU-PAN-2 and CA19-9 were studied by immunohystochemical techniques. The relationship between the expression of these antigens and the classification or the differentiation degree of the tumors were examined. Results DU-PAN-2 or CA19-9 antigens were detected in 41 (54%) and 45 (59%) cases of the 76 malignant epithelial tumors investigated. These antigens were detected in all types of malignant epithelial tumors, including squamous cell carcinomas, where they were mainly localized to the entire cell surface of malignant cells. In adenocarcinomas, large cell carcinomas and small cell carcinomas, however, these antigens were commonly detected both on the cell membrane and in the cytoplasm. There was positive correlation between the degree of differentiation and DU-PAN-2, but not CA19-9 expression. Among the non-epithelial tumors investigated, those antigens were detected in pulmonary blastomas but not in mesotheliomas. Conclusions Immunohistochemical studies for DU-PAN-2 and CA19-9 are useful for defining characteristics of the lung tumors. DU-PAN-2 could be a marker for differentiating between malignant epithelial tumors and mesotheliomas.
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Affiliation(s)
- G Ohshio
- Department of Surgery and Thoracic Surgery, Kyoto University, Japan
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20
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Choi D, Wishon MJ, Chang CY, Citrin DS, Locquet A. Multistate intermittency on the route to chaos of a semiconductor laser subjected to optical feedback from a long external cavity. Chaos 2018; 28:011102. [PMID: 29390638 DOI: 10.1063/1.5013332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We observe experimentally two regimes of intermittency on the route to chaos of a semiconductor laser subjected to optical feedback from a long external cavity as the feedback level is increased. The first regime encountered corresponds to multistate intermittency involving two or three states composed of several combinations of periodic, quasiperiodic, and subharmonic dynamics. The second regime is observed for larger feedback levels and involves intermittency between period-doubled and chaotic regimes. This latter type of intermittency displays statistical properties similar to those of on-off intermittency.
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Affiliation(s)
- Daeyoung Choi
- Georgia Tech-CNRS UMI 2958, Georgia Tech Lorraine, 2 Rue Marconi, F-57070 Metz, France
| | - Michael J Wishon
- Georgia Tech-CNRS UMI 2958, Georgia Tech Lorraine, 2 Rue Marconi, F-57070 Metz, France
| | - C Y Chang
- Georgia Tech-CNRS UMI 2958, Georgia Tech Lorraine, 2 Rue Marconi, F-57070 Metz, France
| | - D S Citrin
- Georgia Tech-CNRS UMI 2958, Georgia Tech Lorraine, 2 Rue Marconi, F-57070 Metz, France
| | - A Locquet
- Georgia Tech-CNRS UMI 2958, Georgia Tech Lorraine, 2 Rue Marconi, F-57070 Metz, France
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21
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Le AK, Zhao C, Hoang JK, Tran SA, Chang CY, Jin M, Nguyen NH, Yasukawa LA, Zhang JQ, Weber SC, Garcia G, Nguyen MH. Ethnic disparities in progression to advanced liver disease and overall survival in patients with chronic hepatitis C: impact of a sustained virological response. Aliment Pharmacol Ther 2017; 46:605-616. [PMID: 28766727 DOI: 10.1111/apt.14241] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 05/08/2017] [Revised: 06/04/2017] [Accepted: 07/08/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Chronic hepatitis C (CHC) can lead to cirrhosis and hepatocellular carcinoma (HCC). A sustained virological response (SVR) is associated with improved outcomes, however, its impact on different ethnic groups is unknown. AIM To evaluate ethnic differences in the natural history of CHC and the impact of SVR. METHODS We conducted a cohort study of 8039 consecutive adult CHC patients seen at two medical centres in California between January 1997 and June 2016. Individual chart review confirmed CHC diagnosis. RESULTS Asian and Hispanic but not African American patients had significantly higher cirrhosis and HCC incidence than Caucasians. On multivariate analysis, Hispanic ethnicity was independently associated with increased cirrhosis (adjusted HR 1.37, CI, confidence interval 1.10-1.71, P=.006) and HCC risk (adjusted HR 1.47, CI 1.13-1.92, P=.004) compared to Caucasian. Asian ethnicity had a significant association with cirrhosis (adjusted HR 1.28, CI 1.02-1.61, P=.034) and HCC risk (adjusted HR 1.29, CI 0.94-1.77, P=.025). In patients who achieved SVR, Hispanic ethnicity was no longer independently associated with cirrhosis (adjusted HR 1.76, CI 0.66-4.71, P=.26) or HCC (adjusted HR 1.05, CI 0.27-4.08, P=.94); nor was Asian ethnicity (adjusted HR 0.62, CI 0.21-1.82, P=.38 for cirrhosis; 2.01, CI 0.63-6.36, P=.24 for HCC). Similar findings were observed with overall survival among the ethnicities by SVR status. CONCLUSION Hispanic and Asian ethnicity was independently associated with increased cirrhosis and HCC risk. Achieving an SVR eliminates the ethnic disparity in liver disease progression and overall survival between Hispanic and Asian vs Caucasian CHC patients.
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Affiliation(s)
- A K Le
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA
| | - C Zhao
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA.,Department of Cirrhosis, Institute of Liver Disease, Shuguang Hospital, Shanghai, China
| | - J K Hoang
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA
| | - S A Tran
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA.,Stanford University, Palo Alto, CA, USA
| | - C Y Chang
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA.,David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, USA
| | - M Jin
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA.,Department of Epidemiology and Biostatistics, Zhejiang University, Hangzhou, China
| | - N H Nguyen
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA.,Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - L A Yasukawa
- Center for Clinical Informatics, Stanford University School of Medicine, Palo Alto, CA, USA
| | - J Q Zhang
- Chinese Hospital, San Francisco, CA, USA
| | - S C Weber
- Center for Clinical Informatics, Stanford University School of Medicine, Palo Alto, CA, USA
| | - G Garcia
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA
| | - M H Nguyen
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA
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22
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Lu CW, Lin TY, Chang CY, Huang SK, Wang SJ. Ciproxifan, a histamine H3 receptor antagonist and inverse agonist, presynaptically inhibits glutamate release in rat hippocampus. Toxicol Appl Pharmacol 2017; 319:12-21. [DOI: 10.1016/j.taap.2017.01.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 01/18/2017] [Accepted: 01/25/2017] [Indexed: 01/22/2023]
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Abstract
For dental orthodontic applications, NiTi wires are used under bending conditions in the oral environment for a long period. The purpose of this study was to investigate the effect of bending stress on the corrosion of NiTi wires using potentiodynamic and potentiostatic tests in artificial saliva. The results indicated that bending stress induces a higher corrosion rate of NiTi wires in passive regions. It is suggested that the passive oxide film of specimens would be damaged under bending conditions. Auger electron spectroscopic analysis showed a lower thickness of passive films on stressed NiTi wires compared with unstressed specimens in the passive region. By scanning electron microscopy, localized corrosion was observed on stressed Sentalloy specimens after a potentiodynamic test at pH 2. In conclusion, this study indicated that bending stress changed the corrosion properties and surface characteristics of NiTi wires in a simulated intra-oral environment.
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Affiliation(s)
- I H Liu
- Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan, ROC
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24
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Lutchman G, Nguyen NH, Chang CY, Ahmed A, Daugherty T, Garcia G, Kumari R, Gupta S, Doshi D, Nguyen MH. Effectiveness and tolerability of simeprevir and sofosbuvir in nontransplant and post-liver transplant patients with hepatitis C genotype 1. Aliment Pharmacol Ther 2016; 44:738-46. [PMID: 27506182 DOI: 10.1111/apt.13761] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 04/29/2016] [Revised: 06/16/2016] [Accepted: 07/21/2016] [Indexed: 12/23/2022]
Abstract
BACKGROUND Hepatitis C virus genotype 1a (HCV-1a), prior treatment, cirrhosis and post-transplant status are historically associated with poor treatment responses. The new oral direct-acting agents appear to be effective and safe in these patients. AIMS To evaluate the effectiveness and tolerability of simeprevir and sofosbuvir in a diverse real-life cohort of patients, including difficult-to-treat patients. METHODS We conducted a retrospective cohort study in 198 consecutive patients with hepatitis C genotype 1 (148 nontransplant, 50 post transplant), who were treated with simeprevir and sofosbuvir for 12 weeks between December 2013 and December 2014. Primary outcome was sustained virological response with undetectable HCV RNA 12 weeks after completion of therapy (SVR12). Risk factors evaluated for lack of SVR12 included HCV 1a (vs. 1b), prior treatment (vs. none), and cirrhosis (vs. no cirrhosis). RESULTS SVR12 rates were similar in non- and post-transplant settings, 82% and 88%, respectively. There were no significant differences in adverse events in patients regardless of cirrhosis or transplant status. On multivariate analysis also inclusive of gender and liver transplant status, negative predictors of SVR12 were having at least 2 or 3 risk factors (OR 0.30, 95% CI 0.10-0.87, P = 0.027 or 0.29, 95% CI 0.09-0.85, P = 0.025, respectively). CONCLUSION Simeprevir and sofosbuvir combination is a safe and effective regimen for the treatment of non- and post-transplant patients with traditional risk factors for poor treatment response, unless more than 2 difficult-to-treat risk factors are present.
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Affiliation(s)
- G Lutchman
- Gastroenterology and Hepatology, Liver Transplant Program, Stanford University Medical Center, Palo Alto, CA, USA
| | - N H Nguyen
- School of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - C Y Chang
- Gastroenterology and Hepatology, Liver Transplant Program, Stanford University Medical Center, Palo Alto, CA, USA
| | - A Ahmed
- Gastroenterology and Hepatology, Liver Transplant Program, Stanford University Medical Center, Palo Alto, CA, USA
| | - T Daugherty
- Gastroenterology and Hepatology, Liver Transplant Program, Stanford University Medical Center, Palo Alto, CA, USA
| | - G Garcia
- Gastroenterology and Hepatology, Liver Transplant Program, Stanford University Medical Center, Palo Alto, CA, USA
| | - R Kumari
- Gastroenterology and Hepatology, Liver Transplant Program, Stanford University Medical Center, Palo Alto, CA, USA
| | - S Gupta
- Medical Affairs, Janssen Scientific Affairs, Titusville, NJ, USA
| | - D Doshi
- Health Economics & Outcomes Research, Janssen Scientific Affairs, Titusville, NJ, USA
| | - M H Nguyen
- Gastroenterology and Hepatology, Liver Transplant Program, Stanford University Medical Center, Palo Alto, CA, USA
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Lin HY, Chuang CK, Tu RY, Fang YY, Su YN, Chen CP, Chang CY, Liu HC, Chu TH, Niu DM, Lin SP. Epigenotype, genotype, and phenotype analysis of patients in Taiwan with Beckwith-Wiedemann syndrome. Mol Genet Metab 2016; 119:8-13. [PMID: 27436784 DOI: 10.1016/j.ymgme.2016.07.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 07/10/2016] [Accepted: 07/10/2016] [Indexed: 01/02/2023]
Abstract
BACKGROUND Beckwith-Wiedemann syndrome (BWS) is a congenital overgrowth disorder predisposing to tumorigenesis that results from abnormal expression or function of imprinted genes of chromosome 11p15.5. METHODS Forty-seven patients in Taiwan with clinical suspicion of BWS were referred for diagnostic testing based on methylation profiling of H19-associated imprinting center (IC) 1 and KCNQ1OT1-associated IC2 using high-resolution melting analysis, multiplex ligation-dependent probe amplification, or high-resolution quantitative methylation profiling. RESULTS Twenty-eight patients received a clinical diagnosis of BWS (the presence of 3 major features or 2 major features and at least 1 minor feature), 18 had suspected BWS (the presence of at least 1 major feature), and 1 had isolated Wilms' tumor. Nineteen patients were identified with IC2 hypomethylation (including 1 with isolated Wilms' tumor), 1 with IC1 hypermethylation, 2 with paternal uniparental disomy, and 1 with CDKN1C mutation. Several clinical features were found to be statistically different (P<0.05) between the 2 groups-clinical diagnosis of BWS (n=28) or suspected BWS (n=18)-including macroglossia, pre- or postnatal gigantism, abdominal wall defect, ear creases, facial nevus flammeus, BWS score, and the molecular diagnosis rate. Molecular lesion was detected in 81% of patients with the presence of three major features, compared with 33% and 28% of those with two or one major feature, respectively. The mean BWS score was 5.6 for 19 subjects with "IC2 hypomethylation", compared with 3.8 for 2 subjects with pUPD. The BWS score of one subject with CDKN1C mutation and one with IC1 hypermethylation was 6 and 7, respectively. CONCLUSIONS The BWS score was positively correlated with the molecular diagnosis rate (P<0.01). The BWS database of epigenotype, genotype, and phenotype is expected to promote better genetic counseling and medical care of these patients.
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Affiliation(s)
- Hsiang-Yu Lin
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Mackay Junior College of Medicine, Nursing and Management, Taipei, Taiwan; Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chih-Kuang Chuang
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Medical College, Fu-Jen Catholic University, Taipei, Taiwan; Institute of Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | - Ru-Yi Tu
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Yi-Ya Fang
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan
| | - Yi-Ning Su
- Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chih-Ping Chen
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chia-Ying Chang
- Department of Pediatrics, Mackay Memorial Hospital, Hsinchu, Taiwan
| | - Hsi-Che Liu
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan
| | - Tzu-Hung Chu
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Dau-Ming Niu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Shuan-Pei Lin
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan.
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Chiou SY, Lee RC, Chi KH, Chia-Hsien Cheng J, Chiang JH, Chang CY. The triple-phase CT image appearance of post-irradiated livers. Acta Radiol 2016; 42:526-31. [PMID: 11552892 DOI: 10.1080/028418501127347115] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Objective To evaluate the sequential CT appearance of the liver after hepatic irradiation and to investigate the correlation between CT findings and radiation-induced hepatic injury. Material and Methods: The triple-phase CT images of 18 patients with hepatocellular carcinomas (HCC) after hepatic irradiation were retrospectively reviewed (in total 41 CT studies). The high-dose region within the liver was defined as the area receiving more than 90% of the prescribed irradiation dose. The mean radiation dose was 55.5 Gy. Density changes and patterns of enhancement in the high-dose region were classified as three types: type I, constant low-density change in all phases; type II, low-density change in both pre-contrast and arterial phases, and iso-density change in the portal phase; type III, low- or iso-density change in the pre-contrast phase, low- or high-density change in the arterial phase, and persistent high-density change in the portal phase. The interval between completion of radiotherapy and the CT examinations ranged from 9 to 469 days, with a mean of 147 days. Results: Nine of the 41 CT studies presented with type I, 9 with type II, and 16 with type III CT findings. The mean interval between completion of radiotherapy and the appearance of types I, II, and III CT findings were 74, 183, and 220 days, respectively. The interval was significantly shorter for type I findings than for type II and type III. The difference in interval was not significant between type II and type III. A type I finding with constant low-density change in the high-dose region of the liver was the most common pattern of CT findings within the first 3 months after hepatic irradiation. Either types II or III findings were frequently seen after 3 months. Conclusion: The sequential CT appearance and the density changes may indicate correlation with the pathogenesis of veno-occlusive disease.
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Affiliation(s)
- S Y Chiou
- Department of Radiology, Veterans General Hospital-Taipei, Taipei, Taiwan
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Choi D, Wishon MJ, Barnoud J, Chang CY, Bouazizi Y, Locquet A, Citrin DS. Low-frequency fluctuations in an external-cavity laser leading to extreme events. Phys Rev E 2016; 93:042216. [PMID: 27176302 DOI: 10.1103/physreve.93.042216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 06/05/2023]
Abstract
We experimentally investigate the dynamical regimes of a laser diode subject to external optical feedback in light of extreme-event (EE) analysis. We observe EEs in the low-frequency fluctuations (LFFs) regime. This number decreases to negligible values when the laser transitions towards fully developed coherence collapse as the injection current is increased. Moreover, we show that EEs observed in the LFF regime are linked to high-frequency pulsing events observed after a power dropout. Finally, we prove experimentally that the observation of EEs in the LFF regimes is robust to changes in operational parameters.
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Affiliation(s)
- Daeyoung Choi
- UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, 2 Rue Marconi F-57070, Metz, France
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA
| | - Michael J Wishon
- UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, 2 Rue Marconi F-57070, Metz, France
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA
| | - J Barnoud
- UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, 2 Rue Marconi F-57070, Metz, France
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA
| | - C Y Chang
- UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, 2 Rue Marconi F-57070, Metz, France
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA
| | - Y Bouazizi
- UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, 2 Rue Marconi F-57070, Metz, France
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA
| | - A Locquet
- UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, 2 Rue Marconi F-57070, Metz, France
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA
| | - D S Citrin
- UMI 2958 Georgia Tech-CNRS, Georgia Tech Lorraine, 2 Rue Marconi F-57070, Metz, France
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0250, USA
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Lin HY, Chuang CK, Chen MR, Lin SM, Hung CL, Chang CY, Chiu PC, Tsai WH, Niu DM, Tsai FJ, Lin SJ, Hwu WL, Lin JL, Lin SP. Cardiac structure and function and effects of enzyme replacement therapy in patients with mucopolysaccharidoses I, II, IVA and VI. Mol Genet Metab 2016; 117:431-7. [PMID: 26899310 DOI: 10.1016/j.ymgme.2016.02.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 02/15/2016] [Accepted: 02/15/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND While enzyme replacement therapy (ERT) has been shown to improve endurance and joint mobility for patients with mucopolysaccharidoses (MPS) I, II, IVA and VI, the impact of ERT on cardiac abnormalities remains uncertain. METHODS Medical records and echocardiograms of 28 Taiwanese MPS patients (9 with MPS I, 7 with MPS II, 7 with MPS IVA, and 5 with MPS VI) treated with ERT for 1-10.8years were retrospectively reviewed. RESULTS At start of ERT, z scores>2 were identified in 46% and 75% for left ventricular mass index (LVMI) and interventricular septum thickness in diastole (IVSd) in these patients, respectively. Twenty-four patients (86%) had valvular heart disease. After ERT, the mean IVSd z score of all patients decreased significantly from 3.87 to 2.57 (p=0.016). For 11 patients starting ERT before 12years of age, z scores for both LVMI and IVSd decreased significantly (p<0.01) after ERT. However, the condition of valve regurgitation or stenosis did not show improvement despite ERT. CONCLUSIONS ERT was shown to be an effective therapy for reducing cardiac hypertrophy, with best results seen when ERT was started at an early age. ERT, however, had little impact on valvular heart disease.
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Affiliation(s)
- Hsiang-Yu Lin
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Mackay Junior College of Medicine, Nursing and Management, Taipei, Taiwan; Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chih-Kuang Chuang
- Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Medical College, Fu-Jen Catholic University, Taipei, Taiwan; Institute of Biotechnology, National Taipei University of Technology, Taipei, Taiwan
| | - Ming-Ren Chen
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan; Mackay Junior College of Medicine, Nursing and Management, Taipei, Taiwan
| | - Shan-Miao Lin
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan; Mackay Junior College of Medicine, Nursing and Management, Taipei, Taiwan
| | - Chung-Lieh Hung
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan; Division of Cardiology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan
| | - Chia-Ying Chang
- Department of Pediatrics, Mackay Memorial Hospital, Hsinchu, Taiwan
| | - Pao Chin Chiu
- Department of Pediatrics, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Wen-Hui Tsai
- Department of Pediatrics, Chi Mei Medical Center, Tainan, Taiwan
| | - Dau-Ming Niu
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan; Department of Pediatrics, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Fuu-Jen Tsai
- Department of Pediatrics, China Medical University Hospital, Taichung, Taiwan
| | - Shio Jean Lin
- Department of Pediatrics, Chi Mei Medical Center, Tainan, Taiwan
| | - Wuh-Liang Hwu
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
| | - Ju-Li Lin
- Division of Genetics and Endocrinology, Department of Pediatrics, Chang Gung Memorial Hospital at Linkou and Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Shuan-Pei Lin
- Department of Medicine, Mackay Medical College, New Taipei City, Taiwan; Department of Pediatrics, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Department of Infant and Child Care, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan.
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Venmathi Maran BA, Soh HY, Hwang UW, Chang CY, Myoung JG. First records of parasitic copepods (Crustacea, Siphonostomatoida) from marine fishes in Korea. Trop Biomed 2015; 32:352-364. [PMID: 26691264] [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: 06/05/2023]
Abstract
The knowledge of the biodiversity of parasitic copepods in South Korea is increasing. Interestingly we report here, some parasitic copepods considered as the first record of findings from Korea. Nine species of parasitic copepods (Siphonostomatoida) including six genera of three different families [Caligidae (7), Lernaeopodidae (1), Lernanthropidae (1)] were recovered from eight species of wild fishes in Korea: 1) Caligus hoplognathi Yamaguti & Yamasu, 1959 (♀, ♂) from the body surface of barred knifejaw Oplegnathus fasciatus (Temminck & Schlegel); 2) Caligus lagocephali Pillai, 1961 (♀) from the gills of panther puffer Takifugu pardalis (Temminck & Schlegel); 3) Euryphorus brachypterus (Gerstaecker, 1853) (♀, ♂) from the opercular cavity of Atlantic bluefin tuna Thunnus thynnus (Linnaeus); 4) Euryphorus nordmanni Milne Edwards, 1840 (♀, ♂) from the opercular cavity of common dolphin fish Coryphaena hippurus Linnaeus; 5) Gloiopotes huttoni (Thomson) (♀, ♂) from the body surface of black marlin Istiompax indica (Cuvier); 6) Lepeophtheirus hapalogenyos Yamaguti & Yamasu, 1959 (♀) from the gill filaments of O. fasciatus; 7) Lepeophtheirus sekii Yamaguti, 1936 (♀, ♂) from the body surface of red seabream Pagrus major (Temminck & Schlegel); 8) Brachiella thynni Cuvier, 1830 (♀) from the body surface of longfin tuna or albacore Thunnus alalunga (Bonnaterre); 9) Lernanthropinus sphyraenae (Yamaguti & Yamasu, 1959) (♀) from the gill filaments of moon fish Mene maculata (Bloch & Schneider). Since the female was already reported in Korea, it is a new record for the male of C. hoplognathi. A checklist for the parasitic copepods of the family Caligidae, Lernaeopodidae and Lernanthropidae of Korea is provided.
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Affiliation(s)
- B A Venmathi Maran
- Biological Oceanography & Marine Biology Division, Korea Institute of Ocean Science & Technology, 787 Haean-ro, Ansan 426-744, Republic of Korea
| | - H Y Soh
- Faculty of Marine Technology, Chonnam National University, 50 Daehak-ro, Yeosu, Jeollanam-do 550-749, Republic of Korea
| | - U W Hwang
- Department of Biology, Teachers College and Institute for Phylogenomics and Evolution, Kyungpook National University, Buk-gu, Deagu 702-701, Republic of Korea
| | - C Y Chang
- Department of Biology, College of Natural Science, Daegu University, Gyeongsan, Gyeongsangbuk-do 712-714, Republic of Korea
| | - J G Myoung
- Biological Oceanography & Marine Biology Division, Korea Institute of Ocean Science & Technology, 787 Haean-ro, Ansan 426-744, Republic of Korea
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Abstract
The excessive release of glutamate is a critical element in the neuropathology of acute and chronic brain disorders. The purpose of the present study was to investigate the effect and possible mechanism of myricetin, a naturally occurring flavonoid with a neuroprotective profile, on endogenous glutamate release in the nerve terminals (synaptosomes) of the rat cerebral cortex. The release of glutamate was evoked by the K(+) channel blocker 4-aminopyridine (4-AP) and measured by one-line enzyme-coupled fluorometric assay. We also used a membrane potential-sensitive dye to assay the synaptosomal plasma membrane potential, and a Ca(2+) indicator Fura-2 to monitor cytosolic Ca(2+) concentrations ([Ca(2+)]C). Results show that myricetin inhibited 4-AP-evoked glutamate release, and this effect was prevented by chelating extracellular Ca(2+) ions and the vesicular transporter inhibitor bafilomycin A1. However, the glutamate transporter inhibitor dl-threo-beta-benzyl-oxyaspartate had no effect on myricetin action. Myricetin did not alter the synaptosomal membrane potential, but decreased 4-AP-induced increases in the cytosolic free Ca(2+) concentration. Furthermore, the myricetin effect on 4-AP-evoked glutamate release was prevented by blocking the Cav2.2 (N-type) and Cav2.1 (P/Q-type) channels, but not by blocking intracellular Ca(2+) release. These results suggest that myricetin inhibits glutamate release from cerebrocortical synaptosomes by attenuating voltage-dependent Ca(2+) entry. This implies that the inhibition of glutamate release is an important pharmacological activity of myricetin that may play a critical role in the apparent clinical efficacy of this compound.
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Affiliation(s)
- Yi Chang
- 1 School of Medicine, Fu Jen Catholic University , New Taipei City, Taiwan
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Fang GC, Lin YH, Chang CY, Zheng YC. Concentrations of particulates in ambient air, gaseous elementary mercury (GEM), and particulate-bound mercury (Hg(p)) at a traffic sampling site: a study of dry deposition in daytime and nighttime. Environ Geochem Health 2014; 36:605-612. [PMID: 24263618 DOI: 10.1007/s10653-013-9584-1] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 11/08/2013] [Indexed: 06/02/2023]
Abstract
In this investigation, the concentrations of particles in ambient air, gaseous elemental mercury (GEM), and particulate-bound mercury (Hg(p)) in total suspended particulates (TSP) as well as dry deposition at a (Traffic) sampling site at Hung-kuang were studied during the day and night in 2012. The results reveal that the mean concentrations of TSP in ambient air, GEM, and Hg(p) were 69.72 μg/m(3), 3.17, and 0.024 ng/m(3), respectively, at the Hung-kuang (Traffic) sampling site during daytime sampling periods. The results also reveal that the mean rates of dry deposition of particles from ambient air and Hg(p) were 145.20 μg/m(2) min and 0.022 ng/m(2) min, respectively, at the Hung-kuang (Traffic) sampling site during the daytime sampling period. The mean concentrations of TSP in ambient air, GEM, and Hg(p) were 60.56 μg/m(3), 2.74, and 0.018 ng/m(3), respectively, at the Hung-kuang (Traffic) sampling site during the nighttime sampling period. The mean rates of dry deposition of particles and Hg(p) from ambient air were 132.58 μg/m(2) min and 0.016 ng/m(2) min, respectively, at the Hung-kuang (Traffic) sampling site during the nighttime sampling period.
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Affiliation(s)
- Guor-Cheng Fang
- Department of Safety, Health and Environmental Engineering, HungKuang University, Sha-Lu, Taichung 433, Taiwan,
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Tseng TM, Chen PY, Tseng H, Lin HC, Chang CY, Hung SH. An unexpected route for otolaryngology bacterial contamination with a Venturi atomizer. Rhinology 2014; 52:156-161. [PMID: 24932628 DOI: 10.4193/rhino13.124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The Venturi-principle atomizer is a commonly used device in otolaryngology practices. The purpose of this study is to evaluate the possible route of bacterial contamination from the nasal vestibule to the atomizer tip through the jet airflow created during the use of the Venturi atomizer. METHODS Thirty nostrils from 15 enrolled volunteers were tested. The aerosols generated by spraying sterilized saline into the nostrils were collected using a specially made aerosol-collecting nozzle cap. The collected samples were sent for bacterial culture, and nasal vestibular swab cultures were performed for comparison. RESULTS In the aerosol-exposed group, 18 out of 30 samples (60%) were positive for bacterial growth, confirming the bacterial contamination from the nasal vestibule to the atomizer tip through the reverse jet airflow. The bacteria species in 8 of the 18 positive samples were identical to those from the nasal swab culture results from the same nostril. CONCLUSION In ordinary otolaryngology practices, there are significant risks for bacterial contamination from the nasal vestibule to the tip of the Venturi atomizer even without direct contact. Clinicians must be more aware of this pattern of contamination, which has not been reported in the existing literature.
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Yang HS, Chen IC, Lee YT, Lee KC, Chuang YC, Chang CY, Wei J. Cardiac transplantation and concomitant coronary artery bypass grafting: our experiences in 11 cases. Transplant Proc 2014; 46:900-2. [PMID: 24767376 DOI: 10.1016/j.transproceed.2013.11.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 09/30/2013] [Accepted: 11/07/2013] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The shortage of donor hearts for transplantation could be alleviated by including the hearts of older donors. Previous literature revealed similar early and medium-term survival outcomes compared with those of younger donors. This study presents our experience with patients who underwent orthotopic heart transplantation and concomitant coronary artery bypass grafting at our institution. METHODS We present our experience with 11 patients with end-stage cardiomyopathy (8 men and 3 women) undergoing orthotopic heart transplantation and concomitant coronary artery bypass grafting from September 2002 to November 2011 at our institute. RESULTS All 11 donor organs would otherwise have been rejected, depriving potential recipients of organ transplantation. Two patients received concurrent 2-coronary-artery bypass, and the other 9 patients received concurrent single-coronary-artery bypass during orthotopic heart transplantation. All patients had an uneventful postoperative course, with follow-up completed 3 to 128 months after cardiac transplantation and concomitant coronary artery bypass grafting surgery. CONCLUSIONS Our experiences suggest that donor hearts requiring coronary artery bypass grafting, which form a small but significant donor subgroup, can be used effectively and safely when matched to the recipients' age and medical condition.
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Affiliation(s)
- H S Yang
- Heart Center, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C
| | - I C Chen
- Heart Center, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C
| | - Y T Lee
- Heart Center, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C
| | - K C Lee
- Heart Center, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C
| | - Y C Chuang
- Heart Center, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C
| | - C Y Chang
- Heart Center, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C
| | - J Wei
- Heart Center, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C.
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Cho YT, Lin JW, Chen YC, Chang CY, Hsiao CH, Chung WH, Chu CY. Generalized bullous fixed drug eruption is distinct from Stevens-Johnson syndrome/toxic epidermal necrolysis by immunohistopathological features. J Am Acad Dermatol 2014; 70:539-48. [PMID: 24388722 DOI: 10.1016/j.jaad.2013.11.015] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 10/11/2013] [Accepted: 11/07/2013] [Indexed: 01/11/2023]
Abstract
BACKGROUND Generalized bullous fixed drug eruption (GBFDE), a particular form of fixed drug eruption (FDE), is characterized by widespread blisters and erosions and can be confused with Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN). OBJECTIVE We sought to analyze specific features of GBFDE and differentiate it from SJS/TEN. METHODS We retrospectively studied patients with GBFDE and SJS/TEN during a period of 10 years. GBFDE was defined as typical FDE lesions with blisters involving at least 10% body surface area on at least 3 of 6 different anatomic sites. Clinical presentations; histopathological features; immunohistochemical patterns of cluster-of-differentiation (CD)3, CD4, CD8, CD56, Fas, Fas ligand, granzyme B, perforin, granulysin, and forkhead box P3 (Foxp3); and serum granulysin levels were compared. RESULTS Twenty-three cases of GBFDE were collected. Patients with GBFDE had shorter latent periods, less mucosal involvement, more eosinophil infiltration, and dermal melanophages. Lesional infiltrates in GBFDE had more dermal CD4(+) cells including Foxp3(+) regulatory T cells, fewer intraepidermal CD56(+) cells, and fewer intraepidermal granulysin(+) cells. The serum level of granulysin in GBFDE was also significantly lower than in SJS/TEN. LIMITATIONS The number of cases in this study is small. CONCLUSION GBFDE is a distinct disease distinguishable from SJS/TEN by particular features such as granulysin, CD56, and Foxp3 expressions.
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Affiliation(s)
- Yung-Tsu Cho
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | - Jheng-Wei Lin
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Keelung and Linkou Branches, College of Medicine, Chang Gung University, Linkou, Taiwan
| | - Yi-Chun Chen
- Department of Dermatology, Cathay General Hospital, Taipei, Taiwan
| | - Chia-Ying Chang
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | | | - Wen-Hung Chung
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Keelung and Linkou Branches, College of Medicine, Chang Gung University, Linkou, Taiwan
| | - Chia-Yu Chu
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
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Chen CH, Chang CY. Unique glucose-6-phosphatase, catalytic subunit mutation in a child with type Ia glycogen storage disease in Taiwan. J Med Sci 2014. [DOI: 10.4103/1011-4564.143651] [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: 11/04/2022] Open
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Chang CY, Feng TS, Wang JR, Lin HT, Shih C. Assessing the SCRRI and RIP runback performances of TRACE/PARCS for Lungmen ABWR. ANN NUCL ENERGY 2014. [DOI: 10.1016/j.anucene.2013.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Chen YC, Chang CY, Cho YT, Chiu HC, Chu CY. Reply to: “Using a diagnostic score when reporting the long-term sequelae of the drug reaction with eosinophilia and systemic symptoms”. J Am Acad Dermatol 2013; 69:1060-2. [DOI: 10.1016/j.jaad.2013.08.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 08/09/2013] [Indexed: 12/17/2022]
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Lin SP, Lin HY, Wang TJ, Chang CY, Lin CH, Huang SF, Tsai CC, Liu HL, Keutzer J, Chuang CK. A pilot newborn screening program for Mucopolysaccharidosis type I in Taiwan. Orphanet J Rare Dis 2013; 8:147. [PMID: 24053568 PMCID: PMC3849552 DOI: 10.1186/1750-1172-8-147] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 09/13/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mucopolysaccharidosis type I (MPS I) is a genetic disease caused by the deficiency of α-L-iduronidase (IDUA) activity. MPS I is classified into three clinical phenotypes called Hurler, Scheie, and Hurler-Scheie syndromes according to their clinical severity. Treatments for MPS I are available. Better outcomes are associated with early treatment, which suggests a need for newborn screening for MPS I. The goal of this study was to determine whether measuring IDUA activity in dried blood on filter paper was effective in newborn screening for MPS I. METHODS We conducted a newborn screening pilot program for MPS I from October 01, 2008 to April 30, 2013. Screening involved measuring IDUA activity in dried blood spots from 35,285 newborns using a fluorometric assay. RESULTS Of the 35,285 newborns screened, 19 did not pass the tests and had been noticed for a recall examination. After completing further recheck process, 3 were recalled again for leukocyte IDUA enzyme activity testing. Two of the three had deficient leukocyte IDUA activity. Molecular DNA analyses confirmed the diagnosis of MPS I in these two newborns. CONCLUSIONS It is feasible to use the IDUA enzyme assay for newborn screening. The incidence of MPS I in Taiwan estimated from this study is about 1/17,643.
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Affiliation(s)
- Shuan-Pei Lin
- Division of Genetics and Metabolism, Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan.
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Lin CJ, Wu TH, Lin CH, Hung SC, Chiu CF, Liu MJ, Teng MMH, Chang FC, Guo WY, Chang CY. Can iterative reconstruction improve imaging quality for lower radiation CT perfusion? Initial experience. AJNR Am J Neuroradiol 2013; 34:1516-21. [PMID: 23578678 DOI: 10.3174/ajnr.a3436] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Initial results using IR for CT of the head showed satisfactory subjective and objective imaging quality with a 20-40% radiation dose reduction. The aim of our study was to compare the influence of IR and FBP algorithms on perfusion parameters at standard and lowered doses of CTP. MATERIALS AND METHODS Forty patients with unilateral carotid stenosis post-carotid stent placement referred for follow-up CTP were divided into 2 groups (tube currents were 100 mAs in group A and 80 mAs in group B). Datasets were reconstructed with IR and FBP algorithms; and SNRs of gray matter, white matter, and arterial and venous ROIs were compared. CBF, CBV, and MTT means and SNRs were evaluated by using linear regression, and qualitative imaging scores were compared across the 2 algorithms. RESULTS The mean effective radiation dose of group B (2.06 mSv) was approximately 20% lower than that of group A (2.56 mSv). SNRs for ROIs in the dynamic contrast-enhanced images were significantly higher than those for the FBP images. Correlations of the SNRs for CBF, CBV, and MTT across the 2 algorithms were moderate (R² = 0.46, 0.23, and 0.44, respectively). ROIs in gray matter rather than the IR algorithm predicted increasing SNRs in all CBF, CBV, and MTT maps. Two cases of significant restenosis were confirmed in both algorithms. CBV, CBF, and MTT imaging scores did not differ significantly across algorithms or groups. CONCLUSIONS Lower dose CTP (20% below normal dose) without IR can effectively identify oligemic tissue in poststenting follow-up. IR does not alter the absolute values or increase the SNRs of perfusion parameters. Other methods should be attempted to improve SNRs in settings with low tube currents.
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Affiliation(s)
- C J Lin
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
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Chiu HY, Chang CY, Hsiao CH, Wang LF. Concurrent cytomegalovirus and herpes simplex virus infection in pemphigus vulgaris treated with rituximab and prednisolone. Acta Derm Venereol 2013; 93:200-1. [PMID: 22948546 DOI: 10.2340/00015555-1429] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Wang KW, Chueh LL, Wang MH, Huang YT, Fang BH, Chang CY, Fang MC, Chou JY, Hsieh SC, Wan CH. Multiplex polymerase chain reaction assay for the detection of minute virus of mice and mouse parvovirus infections in laboratory mice. Lab Anim 2013; 47:116-21. [PMID: 23492514 DOI: 10.1177/0023677213478298] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Mouse parvoviruses are among the most prevalent infectious pathogens in contemporary mouse colonies. To improve the efficiency of routine screening for mouse parvovirus infections, a multiplex polymerase chain reaction (PCR) assay targeting the VP gene was developed. The assay detected minute virus of mice (MVM), mouse parvovirus (MPV) and a mouse housekeeping gene (α-actin) and was able to specifically detect MVM and MPV at levels as low as 50 copies. Co-infection with the two viruses with up to 200-fold differences in viral concentrations can easily be detected. The multiplex PCR assay developed here could be a useful tool for monitoring mouse health and the viral contamination of biological materials.
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Affiliation(s)
- K W Wang
- Graduate Institute of Veterinary Medicine, National Taiwan University, Taipei, Taiwan, ROC
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Chang CC, Chang HC, Wu CH, Chang CY, Liao CC, Chen TL. Adverse postoperative outcomes in surgical patients with immune thrombocytopenia. Br J Surg 2013; 100:684-92; discussion 693. [DOI: 10.1002/bjs.9065] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/10/2012] [Indexed: 01/09/2023]
Abstract
Abstract
Background
Patients with immune thrombocytopenia (ITP) are likely to have various medical co-morbidities, yet their global features regarding adverse postoperative outcomes and use of medical resources when undergoing major surgery are unknown. The objective of this study was to validate whether ITP is an independent risk factor for adverse postoperative outcomes, and to explore the potential clinical predictors of outcomes after major surgery among patients with ITP.
Methods
A retrospective population-based cohort study was conducted using Taiwan's National Health Insurance Research Database, controlling for preoperative co-morbidities by means of multiple logistic regression. Major postoperative complication and mortality rates, and in-hospital medical costs were analysed.
Results
The study included 11 085 surgical patients with ITP and 44 340 controls without ITP matched for sex, age, and type of surgery and anaesthesia. Surgical patients with ITP had a higher risk of postoperative death (odds ratio (OR) 1·89, 95 per cent confidence interval 1·57 to 2·27), and overall postoperative complications (OR 1·47, 1·39 to 1·56), and increased hospital stay (OR 1·90, 1·80 to 2·01), admission to the intensive care unit (OR 1·73, 1·63 to 1·83) and medical costs (OR 1·89, 1·79 to 1·99). Amount of preoperative platelet and/or red blood cell transfusion, emergency visits and admission to hospital for ITP care were identified as risk factors for adverse postoperative outcomes.
Conclusion
Patients with ITP undergoing surgery are at increased risk of adverse perioperative events, particularly if blood or blood product transfusion are required preoperatively, or the procedure is done as an emergency.
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Affiliation(s)
- C C Chang
- Department of Anaesthesiology, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Anaesthesiology, Taipei Medical University, Taipei, Taiwan
| | - H C Chang
- Department of Anaesthesiology, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Anaesthesiology, Taipei Medical University, Taipei, Taiwan
| | - C H Wu
- Department of Surgery, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - C Y Chang
- Department of Paediatrics, Division of Paediatric Haematology/Oncology, Taipei Medical University Hospital, and Graduate Institute of Clinical Medicine, College of Medicine, Taipei, Taiwan
| | - C C Liao
- Department of Anaesthesiology, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Anaesthesiology, Taipei Medical University, Taipei, Taiwan
| | - T L Chen
- Department of Anaesthesiology, Taipei Medical University Hospital, Taipei, Taiwan
- Department of Anaesthesiology, Taipei Medical University, Taipei, Taiwan
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Liao EC, Chen JT, Chao ML, Yu SC, Chang CY, Chu WS, Tsai JJ. Nonadverse effects on allergenicity of isopentenyltransferase-transformed broccoli. J Investig Allergol Clin Immunol 2013; 23:112-119. [PMID: 23654078] [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: 06/02/2023] Open
Abstract
BACKGROUND Genetically modified organisms (GMOs) provide modern agriculture with improvements in efficiency and the benefits of enhanced food production; however, the potential impact of GMOs on human health has not yet been clarified. OBJECTIVE To investigate the allergenicity of isopentenyltransferase (ipt)-transformed broccoli compared with non-GM broccoli. METHODS Sera from allergic individuals were used to identify the allergenicity of GM and non-GM broccoli. Immunoglobulin (Ig) binding of different lines of GM and non-GM broccoli was identified using immunoblotting, enzyme-linked immunosorbent assay, and the histamin release assay. RESULTS Positive reactions to broccoli (Brassica Oleracea) were observed in 7.02% of individuals. Specific IgE to broccoli and total IgE fro allergic individuals were well correlated. The different tests performed showed no significant differences in the allergenicity of conventionally raised and GM broccoli, indicating the absence of unexpected effects on allergenicity in ipt-transformed plants. Using Western blot analysis we detected heterogeneous IgE-reactive allergenic components in broccoli-allergic sera, but no significant differences between GM an non-GM broccoli were observed in serum from the same patients. CONCLUSIONS Our study demonstrates that there are no differences between GM (ipt-transformed) broccoli and non-GM broccoli, as determined by specific IgE in sera from broccoli-allergic patients. This indicates that there were no unexpected effects on allergenicity in this GM broccoli.
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Affiliation(s)
- E C Liao
- Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
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Fang GC, Chang CY. Monitoring ambient air pollutants and apply Woods’ model in the prediction seasonal dry deposition at Chang-Hua (urban) and Kao-Mei (wetland) county, Taiwan. Toxicol Ind Health 2012; 30:728-37. [DOI: 10.1177/0748233712462474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The main purpose for this study was to monitor ambient air particles and metallic elements (Mn, Fe, Zn, Cr, Cu and Pb) in total suspended particulate (TSP) concentration and dry deposition. In addition, the calculated/measured dry deposition flux ratios of ambient air particles and metallic elements (Mn, Fe, Zn, Cr, Cu and Pb) were evaluated using Woods’ model at urban and wetland areas for the 2009–2010 period. The results indicated that the mean highest concentrations of metallic elements Mn, Fe, Zn, Cr, Cu and Pb in TSP were found in Chang-Hua (urban) sampling site. And as for the two characteristic sampling sites, the Woods’ model exhibits better dry deposition of particulates of 18 µm particle size than the rest of the other particle sizes at any sampling site in this study. The average calculated/measured flux ratios for two seasons (summer and fall) by using Woods model at 2.5, 10 and 18 µm particles sizes were also studied. The results indicated that the average calculated/measured flux ratios orders for two seasons of various particles sizes were all displayed as Fe > Mn > Zn > Cu > Cr > Pb > particle. And these calculated/measured flux ratios orders were Fe > Mn > Cu > Zn > Cr > Pb > particle and were Fe > Mn > Zn > Cu > Cr > particle > Pb, during spring and winter seasons, respectively. Finally, in the spring and summer seasons of Gao-Mei (wetland) sampling site, the average calculated/measured flux ratios using Woods’ model was found to be 2.5, 10 and 18 µm, showing the order of the calculated/measured flux ratios to be Fe > Cu > Zn > Mn > Cr > Pb > particle. And the calculated/measured flux ratio orders were Fe > Zn > Mn > Cu > Cr > particle > Pb and were Fe > Cu > Zn > Mn > Cr > particle > Pb for fall and winter season, respectively.
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Affiliation(s)
- Guor-Cheng Fang
- Department of Safety, Health and Environmental Engineering, HungKuang University, Taichung, Taiwan
| | - Chia-Ying Chang
- Department of Safety, Health and Environmental Engineering, HungKuang University, Taichung, Taiwan
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Wei J, Sue SH, Lee YT, Chang CY. Combined heart transplantation and total replacement of thoracic aorta in Marfan's syndrome with recurrent aortic dissection: a case report. Transplant Proc 2012; 44:1174-5. [PMID: 22564657 DOI: 10.1016/j.transproceed.2012.02.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It is extremely rare for a patient to need simultaneous heart transplantation (HTx) and replacement of the thoracic aorta. A 23-year-old woman with Marfan's syndrome underwent Bentall's operation and replacement of the ascending aorta (AsA) due to a type A aortic dissection (AD) in August 2001. In March 2005, she began to experience dyspnea on exertion and was found to have a huge pseudoaneurysm at the aortic root, which had caused dehiscence of the aortic conduit. In July 2009, she suffered acute chest pain followed by hypotension and cold sweating. The computed tomography (CT) scan showed a recurrent dissection with a long intimal tear extending from the arch to the mid-portion of the descending thoracic aorta (DTA). Due to technical difficulties in the repair of the aortic root, she was placed on the HTx waiting list. The next day, she received a donor heart and underwent combined HTx and total replacement of the thoracic aorta. Explantation of the heart improved the exposure of the DTA. With the use of a vascular ring connector (Vasoring), the operation was successfully performed without need for a blood transfusion. The patient was still well at 2 years after the operation. Simultaneous replacement of the heart and the whole segment of the thoracic aorta is technically possible in Marfan patients who are complicated with aortic dissection.
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Affiliation(s)
- J Wei
- Heart Centre, Cheng-Hsin General Hospital, Taipei, Taiwan, R.O.C.
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Johir MAH, Vigneswaran S, Sathasivan A, Kandasamy J, Chang CY. Effect of organic loading rate on organic matter and foulant characteristics in membrane bio-reactor. Bioresour Technol 2012; 113:154-160. [PMID: 22206913 DOI: 10.1016/j.biortech.2011.12.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 11/30/2011] [Accepted: 12/01/2011] [Indexed: 05/31/2023]
Abstract
In this study, the influence of organic loading rate (OLR) on the performance of a membrane bio-reactor (MBR) was investigated. The MBR was operated with 6 different OLRs between 0.5 and 3.0 kg COD/m(3)d. The hydrodynamic parameters of the MBR were kept constant. The hydraulic retention time and sludge retention time were kept at 8h and 40 d respectively. From the experimental investigation, it was found that the removal efficiency of DOC, COD and NH(4)-N decreased when OLRs were increased from 0.5 to 3.0 kg COD/m(3)d. Higher OLRs of 2.75-3.0 kg COD/m(3)d resulted in a higher transmembrane pressure development. The fractionation of organic matters showed more hydrophilic substances with higher OLRs. A detailed organic matter characterization of membrane foulant, soluble microbial product and extracellular polymeric substances showed that bio-polymers type substances together with humic acid and lower molecular neutral and acids were responsible for membrane fouling.
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Affiliation(s)
- M A H Johir
- Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia
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Lin CJ, Hung SC, Guo WY, Chang FC, Luo CB, Beilner J, Kowarschik M, Chu WF, Chang CY. Monitoring peri-therapeutic cerebral circulation time: a feasibility study using color-coded quantitative DSA in patients with steno-occlusive arterial disease. AJNR Am J Neuroradiol 2012; 33:1685-90. [PMID: 22499839 DOI: 10.3174/ajnr.a3049] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Intracranial hemodynamics are important for management of SOAD. This study aimed to monitor peri-stent placement intracranial CirT of patients with SOAD. MATERIALS AND METHODS Twenty-five patients received stent placement for extracranial ICA stenosis, and 34 patients with normal CirT were recruited as controls. Their color-coded DSAs were used to define the Tmax of selected intravascular ROI. A total of 20 ROIs of the ICA, OphA, ACA, MCA, FV, PV, OV, SSS, SS, IJV, and MCV were selected. rTmax was defined as the Tmax at the selected region of interest minus Tmax at the cervical segment of the ICA (I1 on AP view and IA on lateral view). rTmax of the PV was defined as intracranial CirT. Intergroup and intragroup longitudinal comparisons of rTmax were performed. RESULTS rTmax values of the normal cohorts were as follows: ICA-AP, 0.12; ICA-LAT, 0.10; A1, 0.28; A2, 0.53; A3, 0.81; M1, 0.40; M2, 0.80; M3, 0.95; OphA, 0.35; FV, 4.83; PV, 5.11; OV, 5.17; SSS, 6.16; SS, 6.51; IJV, 6.81; and MCV, 3.86 seconds. Before stent placement, the rTmax values of arterial ROIs, except A3 and M3, were prolonged compared with values from control subjects (P < .05). None of the rTmax of any venous ROIs in the stenotic group was prolonged with significance. After stent placement, the rTmax of all arterial ROIs shortened significantly, except A1and M3. Poststenting rTmax was not different from the control group. CONCLUSIONS Without extra contrast medium and radiation dosages, color-coded quantitative DSA enables real-time monitoring of peri-therapeutic intracranial CirT in patients with SOAD .
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Affiliation(s)
- C J Lin
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
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Chang SM, Chang CY, Lin YL, Hwa K. The studies of self‐assembled xylose derivative on gold nanoparticles. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.773.6] [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: 11/11/2022]
Affiliation(s)
- Shu-Mei Chang
- Institute of Organic and Polymeric MaterialsNational Taipei University of TechnologyTaipeiTaiwan
| | - Chia-Ying Chang
- Institute of Organic and Polymeric MaterialsNational Taipei University of TechnologyTaipeiTaiwan
| | - Yung-Lun Lin
- Institute of Organic and Polymeric MaterialsNational Taipei University of TechnologyTaipeiTaiwan
| | - KuoYuan Hwa
- Institute of Organic and Polymeric MaterialsNational Taipei University of TechnologyTaipeiTaiwan
- Center for Biomedical IndustryTaipeiTaiwan
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Lee CH, Chen YC, Cho YT, Chang CY, Chu CY. Fixed-drug eruption: A retrospective study in a single referral center in northern Taiwan. DERMATOL SIN 2012. [DOI: 10.1016/j.dsi.2012.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Yen CH, Teng MMH, Yuan WH, Sun YC, Chang CY. Preventive vertebroplasty for adjacent vertebral bodies: a good solution to reduce adjacent vertebral fracture after percutaneous vertebroplasty. AJNR Am J Neuroradiol 2012; 33:826-32. [PMID: 22282447 DOI: 10.3174/ajnr.a2898] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Adjacent VCF frequently occurs after percutaneous vertebroplasty. Our aim was to evaluate PrVP in the prevention of PVNO-adjacent VCF. MATERIALS AND METHODS Radiographs of 68 patients who initially presented with a single-level unhealed fracture and underwent vertebroplasty were retrospectively reviewed for the occurrence of PVNO fracture. Patients in the nonpreventive group (n = 33) underwent TVP only for a vertebra with an unhealed fracture. The preventive group (n = 35) underwent PrVP combined with TVP. We injected bone cement into the caudal part of the superior adjacent vertebra and the cephalic part of the inferior adjacent vertebra to perform PrVP. RESULTS The incidences of PVNO fracture in adjacent vertebra next to a vertebra cemented at the patient's first vertebroplasty (within 6 months: 24% versus 3%, P = .012; within 1 year: 30% versus 3%, P = .006; >4 years: 39% versus 3%, P = .006) markedly decreased in the preventive group compared with the nonpreventive group. PVNO fracture was found in 26% of vertebrae adjacent to the first TVP level in the nonpreventive group and in 2% of vertebrae adjacent to a PrVP level in the preventive group after inclusion of all PrVP procedures. Approximately 33% of patients in the nonpreventive group underwent repeat vertebroplasty, mainly due to adjacent fractures. Only 3% of patients in the preventive group underwent repeated procedures. None of the vertebrae cemented for PrVP or TVP developed PVNO refracture. CONCLUSIONS Preventive vertebroplasty for the adjacent vertebra combined with TVP for the fractured vertebra is effective in the prevention of propagation of PVNO adjacent fractures, thus reducing the necessity of multiple repeat vertebroplasty procedures.
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Affiliation(s)
- C H Yen
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China
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