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Lee CC, Lin YC, Pan TY, Yang CH, Li PH, Chen SY, Gao JJ, Yang C, Chu LJ, Huang PJ, Yeh YM, Tang P, Chang YS, Yu JS, Hsiao YC. HeapMS: An Automatic Peak-Picking Pipeline for Targeted Proteomic Data Powered by 2D Heatmap Transformation and Convolutional Neural Networks. Anal Chem 2023; 95:15486-15496. [PMID: 37820297 PMCID: PMC10603604 DOI: 10.1021/acs.analchem.3c01011] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 09/20/2023] [Indexed: 10/13/2023]
Abstract
The process of peak picking and quality assessment for multiple reaction monitoring (MRM) data demands significant human effort, especially for signals with low abundance and high interference. Although multiple peak-picking software packages are available, they often fail to detect peaks with low quality and do not report cases with low confidence. Furthermore, visual examination of all chromatograms is still necessary to identify uncertain or erroneous cases. This study introduces HeapMS, a web service that uses artificial intelligence to assist with peak picking and the quality assessment of MRM chromatograms. HeapMS applies a rule-based filter to remove chromatograms with low interference and high-confidence peak boundaries detected by Skyline. Additionally, it transforms two histograms (representing light and heavy peptides) into a single encoded heatmap and performs a two-step evaluation (quality detection and peak picking) using image convolutional neural networks. HeapMS offers three categories of peak picking: uncertain peak picking that requires manual inspection, deletion peak picking that requires removal or manual re-examination, and automatic peak picking. HeapMS acquires the chromatogram and peak-picking boundaries directly from Skyline output. The output results are imported back into Skyline for further manual inspection, facilitating integration with Skyline. HeapMS offers the benefit of detecting chromatograms that should be deleted or require human inspection. Based on defined categories, it can significantly reduce human workload and provide consistent results. Furthermore, by using heatmaps instead of histograms, HeapMS can adapt to future updates in image recognition models. The HeapMS is available at: https://github.com/ccllabe/HeapMS.
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Affiliation(s)
- Chi-Ching Lee
- Department
of Computer Science and Information Engineering, Chang Gung University, 33302 Taoyuan, Taiwan
- Genomic
Medicine Core Laboratory, Chang Gung Memorial
Hospital, 33305 Taoyuan, Taiwan
- Artificial
Intelligence Research Center, Chang Gung
University, 33302 Taoyuan, Taiwan
| | - Yu-Chieh Lin
- Graduate
Institute of Artificial Intelligence, Chang
Gung University, 33302 Taoyuan, Taiwan
| | - Teng Yu Pan
- Department
of Computer Science and Information Engineering, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Cheng Hann Yang
- Department
of Computer Science and Information Engineering, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Pei-Hsuan Li
- Department
of Computer Science and Information Engineering, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Sin You Chen
- Department
of Computer Science and Information Engineering, Chang Gung University, 33302 Taoyuan, Taiwan
- Artificial
Intelligence Research Center, Chang Gung
University, 33302 Taoyuan, Taiwan
| | - Jhih Jie Gao
- Department
of Computer Science and Information Engineering, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Chi Yang
- Molecular
Medicine Research Center, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Lichieh Julie Chu
- Molecular
Medicine Research Center, Chang Gung University, 33302 Taoyuan, Taiwan
- Graduate
Institute of Biomedical Sciences, College of Medicine, Chang Gung University, 33302 Taoyuan, Taiwan
- Department
of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, 33305 Taoyuan, Taiwan
| | - Po-Jung Huang
- Genomic
Medicine Core Laboratory, Chang Gung Memorial
Hospital, 33305 Taoyuan, Taiwan
- Department
of Biomedical Sciences, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Yuan-Ming Yeh
- Genomic
Medicine Core Laboratory, Chang Gung Memorial
Hospital, 33305 Taoyuan, Taiwan
| | - Petrus Tang
- Molecular
Infectious Disease Research Center, Chang
Gung Memorial Hospital, 33305 Taoyuan, Taiwan
- Department
of Parasitology, College of Medicine, Chang
Gung University, 33302 Taoyuan, Taiwan
| | - Yu-Sun Chang
- Molecular
Medicine Research Center, Chang Gung University, 33302 Taoyuan, Taiwan
| | - Jau-Song Yu
- Molecular
Medicine Research Center, Chang Gung University, 33302 Taoyuan, Taiwan
- Graduate
Institute of Biomedical Sciences, College of Medicine, Chang Gung University, 33302 Taoyuan, Taiwan
- Department
of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, 33305 Taoyuan, Taiwan
- Research
Center for Food and Cosmetic Safety, College of Human Ecology, Chang Gung University of Science and Technology, 33302 Taoyuan, Taiwan
| | - Yung-Chin Hsiao
- Molecular
Medicine Research Center, Chang Gung University, 33302 Taoyuan, Taiwan
- Graduate
Institute of Biomedical Sciences, College of Medicine, Chang Gung University, 33302 Taoyuan, Taiwan
- Department
of Otolaryngology-Head and Neck Surgery, Chang Gung Memorial Hospital, 33305 Taoyuan, Taiwan
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Tai ST, Li PH. Persistent Visual Loss in a 1-Eyed Patient After Intravenous Thrombolytic Therapy for Acute Ischemic Stroke. J Neuroophthalmol 2023; Publish Ahead of Print:00041327-990000000-00359. [PMID: 37223995 DOI: 10.1097/wno.0000000000001891] [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: 05/26/2023]
Affiliation(s)
- Shao-Ting Tai
- School of Medicine (S-TT), College of Medicine, National Taiwan University, Taipei, Taiwan; and Department of Ophthalmology (P-HL), Taipei City Hospital Renai Branch, Taipei, Taiwan
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Kan AKC, Yeung WWY, Lau CS, Li PH. Adult-onset Still's disease after mRNA COVID-19 vaccination presenting with severe myocarditis with acute heart failure and cardiogenic shock: a case report. Hong Kong Med J 2023; 29:162-164. [PMID: 36935111 DOI: 10.12809/hkmj2210110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023] Open
Affiliation(s)
- A K C Kan
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong SAR, China
| | - W W Y Yeung
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong SAR, China
| | - C S Lau
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong SAR, China
| | - P H Li
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong SAR, China
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Chiang V, Kan A, Yeung H, Au E, Lau CS, Li PH. Polyethylene Glycol Allergy: Risks of Skin Testing and Complement-Mediated Anaphylaxis. J Investig Allergol Clin Immunol 2023; 33:71-73. [PMID: 35416153 DOI: 10.18176/jiaci.0813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- V Chiang
- Division of Clinical Immunology, Department of Pathology, Queen Mary Hospital, Hong Kong, China
| | - Akc Kan
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Hhy Yeung
- Division of Clinical Immunology, Department of Pathology, Queen Mary Hospital, Hong Kong, China
| | - Eyl Au
- Division of Clinical Immunology, Department of Pathology, Queen Mary Hospital, Hong Kong, China
| | - C S Lau
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - P H Li
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
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Lee CC, Huang PJ, Yeh YM, Li PH, Chiu CH, Cheng WH, Tang P. Helminth egg analysis platform (HEAP): An opened platform for microscopic helminth egg identification and quantification based on the integration of deep learning architectures. J Microbiol Immunol Infect 2021; 55:395-404. [PMID: 34511389 DOI: 10.1016/j.jmii.2021.07.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 06/26/2021] [Accepted: 07/18/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Millions of people throughout the world suffer from parasite infections. Traditionally, technicians use manual eye inspection of microscopic specimens to perform a parasite examination. However, manual operations have limitations that hinder the ability to obtain precise egg counts and cause inefficient identification of infected parasites on co-infections. The technician requirements for handling a large number of microscopic examinations in countries that have limited medical resources are substantial. We developed the helminth egg analysis platform (HEAP) as a user-friendly microscopic helminth eggs identification and quantification platform to assist medical technicians during parasite infection examination. METHODS Multiple deep learning strategies including SSD (Single Shot MultiBox Detector), U-net, and Faster R-CNN (Faster Region-based Convolutional Neural Network) are integrated to identify the same specimen allowing users to choose the best predictions. An image binning and egg-in-edge algorithm based on pixel density detection was developed to increase the performance. Computers with different operation systems can be gathered to lower the computation time using our easy-to-deploy software architecture. RESULTS A user-friendly interface is provided to substantially increase the efficiency of manual validation. To adapt to low-cost computers, we architected a distributed computing structure with high flexibilities. CONCLUSIONS HEAP serves not only as a prediction service provider but also as a parasitic egg database of microscopic helminth egg image collection, labeling data and pretrained models. All images and labeling resources are free and accessible at http://heap.cgu.edu.tw. HEAP can also be an ideal education and training resource for helminth egg examination.
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Affiliation(s)
- Chi-Ching Lee
- Department of Computer Science and Information Engineering, Chang Gung University, Taoyuan, Taiwan; Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan; Artificial Intelligence Research Center, Chang Gung University, Taoyuan, Taiwan.
| | - Po-Jung Huang
- Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan; Department of Biomedical Sciences, Chang Gung University, Taoyuan, Taiwan.
| | - Yuan-Ming Yeh
- Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan.
| | - Pei-Hsuan Li
- Department of Computer Science and Information Engineering, Chang Gung University, Taoyuan, Taiwan.
| | - Cheng-Hsun Chiu
- Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan.
| | - Wei-Hung Cheng
- Department of Parasitology, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Medical Laboratory Science, College of Medicine, I-Shou University, Kaohsiung City, Taiwan.
| | - Petrus Tang
- Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Linkou, Taiwan; Department of Parasitology, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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Wang BB, Hou LM, Zhou WD, Liu H, Tao W, Wu WJ, Niu PP, Zhang ZP, Zhou J, Li Q, Huang RH, Li PH. Genome-wide association study reveals a quantitative trait locus and two candidate genes on Sus scrofa chromosome 5 affecting intramuscular fat content in Suhuai pigs. Animal 2021; 15:100341. [PMID: 34425484 DOI: 10.1016/j.animal.2021.100341] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/25/2020] [Revised: 07/22/2021] [Accepted: 07/23/2021] [Indexed: 12/14/2022] Open
Abstract
Intramuscular fat content (IFC) is an essential quantitative trait of meat, affecting multiple meat quality indicators. A certain amount of IFC could not only improve the sensory score of pork but also increase the flavour, tenderness, juiciness and shelf-life. To dissect the genetic determinants of IFC, two methods, including genome-wide efficient mixed-model analysis (GEMMA) and linkage disequilibrium adjusted kinships (LDAKs), were used to carry out genome-wide association studies for IFC in Suhuai pig population. A total of 14 and 18 significant single nucleotide polymorphisms (SNPs) were identified by GEMMA and LDAK, respectively. The results of these two methods were highly consistent and all 14 significant SNPs in GEMMA were detected by LDAK. Seven of the 18 SNPs reached the genome-wide significance level (P < 9.85E-07) while 11 cases reached the suggestive significance level (P < 1.77E-05). These significant SNPs were mainly distributed on Sus scrofa chromosome (SSC) 5, 3, and 7. Moreover, one locus resides in a 2.27 Mb (71.37-73.64 Mb) region on SSC5 harbouring 13 significant SNPs associated with IFC, and the lead SNP (rs81302978) also locates in this region. Linkage disequilibrium (LD) analysis showed that there were four pairs of complete LD (r2 = 1) among these 13 SNPs, and the remaining 9 SNPs with incomplete LD (r2 ≠ 1) were selected for subsequent analyses of IFC. Association analyses showed that 7 out of 9 SNPs were significantly associated with IFC (P < 0.05) in 330 Suhuai pigs, and the other 2 SNPs tended to reach a significant association level with IFC (P < 0.1). The phenotypic variance explained (PVE) range of these 9 SNPs was 0.92-3.55%. Meanwhile, the lead SNP was also significantly associated (rs81302978) with IFC (P < 0.05) in 378 commercial hybrid pigs (Pietrain × Duroc) × (Landrace × Yorkshire) (PDLY), and the PVE was 1.38%. Besides, two lipid metabolism-relevant candidate genes, the leucine rich repeat kinase 2 (LRRK2) and PDZ domain containing ring finger 4 (PDZRN4) were identified in the 2.27 Mb region on SSC5. In conclusion, our results may provide a set of markers useful for genetic improvement of IFC in pigs and will advance the genome selection process of IFC on pig breeding programmes.
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Affiliation(s)
- B B Wang
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China; Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - L M Hou
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China; Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - W D Zhou
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China
| | - H Liu
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China; Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - W Tao
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China; Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - W J Wu
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China
| | - P P Niu
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - Z P Zhang
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - J Zhou
- Huaiyin Pig Breeding Farm of Huaian City, Huaian 223322, China
| | - Q Li
- Huaiyin Pig Breeding Farm of Huaian City, Huaian 223322, China
| | - R H Huang
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China; Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - P H Li
- Institute of Swine Science, Nanjing Agricultural University, Nanjing 210095, China; Huaian Academy, Nanjing Agricultural University, Huaian 223005, China.
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7
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Jia Y, Huang Y, Zhang JW, Zhu MF, Li PH, Wang LL, Shao WJ, Tan LL, Qin YH, Chen C. [Clinical characteristics of anti-CV2 antibody-associated neurological diseases]. Zhonghua Yi Xue Za Zhi 2021; 101:2170-2172. [PMID: 34275254 DOI: 10.3760/cma.j.cn112137-20210219-00432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study reviewed the clinical data of patients who were hospitalized in the Department of Neurology of Henan Provincial People's Hospital from January 2017 to October 2020. A total of 46 patients with positive serum anti-CV2 antibody were included. The average age of the patients was (54±15) years old, with a male to female ratio of 1.88∶1. Twenty-six patients were diagnosed with paraneoplastic neurological syndrome (PNS). The most malignant tumors were thymoma, small cell lung cancer, and prostate cancer. The most common PNS included myasthenia gravis, subacute cerebellar degeneration, and subacute/chronic sensorimotor neuropathies. Twenty non-PNS patients exhibited subacute/old cerebral infarction, Parkinson's disease, Alzheimer's disease, and so on. Among them, brain magnetic resonance imaging (MRI) of 10 cases showed different degrees of white matter demyelination, some of which were accompanied by brain atrophy. The current study found that the positive predictive value of anti-CV2 antibody for the diagnosis of PNS was 56.5%, which was relatively weak. As an accompanying antibody, it may be a coincidence, and it may also be related to the involvement of family members in the pathological process of the diseases.
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Affiliation(s)
- Y Jia
- Department of Neurology, Henan University People's Hospital, Zhengzhou, 450000, China
| | - Y Huang
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - J W Zhang
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - M F Zhu
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - P H Li
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - L L Wang
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - W J Shao
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - L L Tan
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - Y H Qin
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - C Chen
- Department of Neurology, Henan Provincial People's Hospital, Zhengzhou, 450000, China
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Li PH, Chung HY, Lau CS. Epidemiology and outcomes of geriatric and non-geriatric patients with drug allergy labels in Hong Kong. Hong Kong Med J 2021; 27:192-197. [PMID: 34168086 DOI: 10.12809/hkmj208716] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Adverse drug reactions are more common in geriatric patients than in younger patients, but there have been insufficient studies concerning the epidemiology or burden of drug allergy labels in geriatric patients. We prospectively investigated the prevalence and outcomes of geriatric patients with drug allergy labels in a cohort of hospitalised patients. METHODS Patients admitted to a regional hospital over a 6-month period were recruited for this study. All patients with drug allergy labels were prospectively followed until discharge; clinical data were anonymously extracted for analyses. Patients were categorised into either geriatric (aged ≥65 years) or non-geriatric (aged <65 years) groups. Demographic characteristics, clinical outcomes, and prevalences of drug allergy labels were compared between groups. RESULTS There were 4361 admissions involving 3641 patients during the 6-month study period. Overall, 492 patients (13.5%) had drug allergy labels, consisting of 151 non-geriatric patients (30.7%) and 341 geriatric patients (69.3%). The prevalence of drug allergy labels did not significantly differ between geriatric and non-geriatric patients (13.5% vs 13.5%, P=0.976). Significantly more patients in the geriatric group had drug allergy labels to cardiovascular system drugs (15.5% vs 4.6%, P=0.001). Geriatric patients had a significantly lower rate of direct discharge from the hospital (73.0% vs 88.1%, P<0.001) and required transfers to convalescent or rehabilitation care for further management. CONCLUSIONS More than 13% of hospitalised geriatric patients had drug allergy labels. The leading causes of drug allergy labels were similar between geriatric and non-geriatric patients. Geriatric patients with drug allergy labels had significantly more labelled allergies to cardiovascular system drugs and adverse clinical outcomes.
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Affiliation(s)
- P H Li
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong
| | - H Y Chung
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong
| | - C S Lau
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong
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9
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Li PH, Wong JCY, Lau CS. Importance of allergological evaluation and skin testing for severe cutaneous adverse reactions: a case report. Hong Kong Med J 2020; 26:444-445. [PMID: 33089791 DOI: 10.12809/hkmj198263] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- P H Li
- Division of Rheumatology and Clinical Immunology, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong
| | - J C Y Wong
- Division of Rheumatology and Clinical Immunology, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong
| | - C S Lau
- Division of Rheumatology and Clinical Immunology, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong
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10
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Satyam VR, Li PH, Reich J, Qazi T, Noronha A, Wasan SK, Farraye FA. Safety of Recombinant Zoster Vaccine in Patients with Inflammatory Bowel Disease. Dig Dis Sci 2020; 65:2986-2991. [PMID: 31897892 DOI: 10.1007/s10620-019-06016-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [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: 10/09/2019] [Accepted: 12/14/2019] [Indexed: 12/30/2022]
Abstract
BACKGROUND Patients with inflammatory bowel disease (IBD) are at increased risk of developing herpes zoster. In October 2017, the FDA approved a two-dose adjuvanted, recombinant herpes zoster vaccine (RZV). There is a theoretical concern that vaccine adjuvants may cause flares in patients with immune-mediated diseases. We aimed to assess the rates of IBD flare and adverse reactions after administration of RZV in a cohort of patients with IBD. METHODS We conducted a prospective observational study of patients with IBD who received RZV between February 2018 and July 2019 at a tertiary IBD referral center. IBD activity scores were collected from patients during office visit or phone call after vaccination. The primary outcome was rate of IBD flare, defined as an increase in IBD activity, resulting in escalation of medical therapy, following vaccination. The secondary outcomes were rates of local and systemic adverse reactions after vaccination. RESULTS We identified 67 patients (28 with ulcerative colitis and 39 with Crohn's disease) who received at least one dose of RZV. The two-dose vaccine series was completed by 55 patients (82%). Median duration of follow-up after vaccination was 207 days. One case of IBD flare was identified. No cases of herpes zoster were identified. Local and systemic adverse reactions were reported in 74.6% and 56.7% of patients, respectively. CONCLUSIONS In this cohort of 67 patients, a low rate of IBD flare (1.5%) was observed after RZV administration. Rates of local and systemic adverse reactions were comparable to those seen in the RZV clinical trials.
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Affiliation(s)
- Venkata R Satyam
- Department of Medicine, Boston Medical Center, Boston University School of Medicine, 72 East Concord St, Evans 124, Boston, MA, 02118, USA.
| | - Pei-Hsuan Li
- Section of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, MA, USA
| | - Jason Reich
- Section of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, MA, USA
| | - Taha Qazi
- Section of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, MA, USA.,Department of Gastroenterology, Hepatology and Nutrition, Cleveland Clinic, Cleveland, OH, USA
| | - Ansu Noronha
- Section of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, MA, USA
| | - Sharmeel K Wasan
- Section of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, MA, USA
| | - Francis A Farraye
- Section of Gastroenterology, Boston Medical Center, Boston University School of Medicine, Boston, MA, USA.,Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, FL, USA
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11
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Li PH. Skin testing for hypersensitivity and cross-reactivity between proton pump inhibitors. Hong Kong Med J 2020; 26:450.e1-450.e2. [PMID: 33089794 DOI: 10.12809/hkmj198267] [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] [Subscribe] [Scholar Register] [Indexed: 06/11/2023] Open
Affiliation(s)
- P H Li
- Division of Rheumatology and Clinical Immunology, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong
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12
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Zhang WQ, Liu W, Li PH, Li W. [Endoscopic Peng' s multifunctional operation dissector for epistaxis]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:464-465. [PMID: 31163560 DOI: 10.13201/j.issn.1001-1781.2019.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Indexed: 11/12/2022]
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Chua GT, Li PH, Ho MH, Lai E, Ngai V, Yau FY, Kwan MY, Leung TF, Lee TH. Hong Kong Institute of Allergy and Hong Kong Society for Paediatric Immunology Allergy & Infectious Diseases joint consensus statement 2018 on vaccination in egg-allergic patients. Hong Kong Med J 2019; 24:527-531. [PMID: 30318478 DOI: 10.12809/hkmj177137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Vaccination of egg-allergic individuals has been a historical concern, particularly for influenza and measles-mumps-rubella-varicella vaccines that are developed in chicken egg embryos or chicken cell fibroblasts. The egg proteins in these vaccines were believed to trigger an immediate allergic reaction in egg-allergic individuals. However, recently published international guidelines have updated their recommendations and now state that these vaccines can be safely administered to egg-allergic individuals. This joint consensus statement by the Hong Kong Institute of Allergy and the Hong Kong Society for Paediatric Immunology Allergy & Infectious Diseases summarises the updates and provides recommendations for local general practitioners and paediatricians. Hong Kong Institute of Allergy and Hong Kong Society for Paediatric Immunology Allergy & Infectious Diseases joint consensus statement 2018 on vaccination in egg-allergic patients Background.
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Affiliation(s)
- G T Chua
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - P H Li
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - M Hk Ho
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - E Lai
- Department of Pharmacy, Queen Mary Hospital, Pokfulam, Hong Kong
| | - V Ngai
- Department of Pharmacy, Queen Mary Hospital, Pokfulam, Hong Kong
| | - F Ys Yau
- Department of Paediatrics and Adolescent Medicine, Queen Elizabeth Hospital, Jordan, Hong Kong
| | - M Yw Kwan
- Department of Paediatrics and Adolescent Medicine, Princess Margaret Hospital, Laichikok, Hong Kong
| | - T F Leung
- Department of Paediatrics, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - T H Lee
- Allergy Centre, Hong Kong Sanatorium and Hospital, Happy Valley, Hong Kong
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14
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Li PH, Wang SY, Tan JY, Lee LH, Yang CI. Infection preventionists' challenges in psychiatric clinical settings. Am J Infect Control 2019; 47:123-127. [PMID: 30314748 DOI: 10.1016/j.ajic.2018.08.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 08/04/2018] [Accepted: 08/05/2018] [Indexed: 10/28/2022]
Abstract
BACKGROUND Infection preventionists (IPs) play an important role in preventing health care-associated infections in a health care system. However, the limitations of the clinical setting and the unique characteristics of psychiatric patients could be barriers to effective infection prevention. The purpose of this study was to understand how IPs perceived their challenges and how these challenges negatively affect their infection prevention work in psychiatric clinical settings. METHODS A descriptive, qualitative research approach was used in this study. Thirteen Taiwanese psychiatric IPs were interviewed in semistructured interviews. Data were transcribed and then analyzed by thematic analysis. RESULTS This analysis identified 6 themes: (1) lack of preservice training in psychiatric infection control, (2) insufficient staffing in practice, (3) working within environmental limits, (4) patient noncompliance, (5) undervaluation of the importance of infection control by professionals, and (6) involvement of hospital administrators. CONCLUSIONS The implementation of effective infection prevention in psychiatric clinical settings may be strongly related to the factors of sufficient training and IP staffing while relying on collaboration among patients and clinical professionals and on the full support of administrators.
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15
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Lee TH, Wu YY, Chan JK, Ho HK, Li PH, Rosa Duque JS. Immunoglobulin G testing in the diagnosis of food allergy and intolerance. Hong Kong Med J 2018; 23:419-20. [PMID: 28775227 DOI: 10.12809/hkmj176310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- T H Lee
- Allergy Centre, Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - Y Y Wu
- Centre for Allergy and Asthma Care, Central, Hong Kong
| | - J Kc Chan
- Allergy Centre, Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - H K Ho
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong
| | - P H Li
- Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong
| | - J Sd Rosa Duque
- Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong.,Division of Rheumatology and Clinical Immunology, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong
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16
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Li PH, Lee PP, Fung SL, Lau CS, Lu YL. Chronic mucocutaneous candidiasis-more than just skin deep. Hong Kong Med J 2018; 24:423-425. [PMID: 30100585 DOI: 10.12809/hkmj166048] [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: 11/05/2022] Open
Affiliation(s)
- P H Li
- Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - P Pw Lee
- Department Paediatrics and Adolescent Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - S L Fung
- Tuberculosis and Chest Unit, Grantham Hospital, Wong Chuk Hang, Hong Kong
| | - C S Lau
- Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - Y L Lu
- Department Paediatrics and Adolescent Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
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17
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Wu WJ, Liu KQ, Li BJ, Dong C, Zhang ZK, Li PH, Huang RH, Wei W, Chen J, Liu HL. Identification of an (AC)n microsatellite in the Six1 gene promoter and its effect on production traits in Pietrain × Duroc × Landrace × Yorkshire pigs. J Anim Sci 2018; 96:17-26. [PMID: 29432614 DOI: 10.1093/jas/skx024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 02/05/2018] [Indexed: 12/22/2022] Open
Abstract
The Sine oculis homeobox 1 (Six1) gene is important for skeletal muscle growth and fiber specification; therefore, it is considered as a promising candidate gene that may influence porcine growth and meat quality traits. Nevertheless, the association of Six1 with these processes and the mechanisms regulating its expression remain unclear. The objectives of this study were to identify variant sites of Six1 in different pig breeds, conduct association analysis to evaluate the relationship between polymorphisms of these variants and porcine production traits in Pietrain × Duroc × Landrace × Yorkshire commercial pigs, and explore the potential regulatory mechanisms of Six1 affecting production traits. A total of 12 variants were identified, including 10 single- nucleotide variations (SNVs), 1 insertion- deletion (Indel), and 1 (AC)n microsatellite. Association analysis demonstrated that the SNV, g.1595A>G, was significantly associated with meat color (redness, a*); individuals with the G allele had greater a* values (P < 0.05). Moreover, our results demonstrated that the (AC)n polymorphism in the Six1 promoter was significantly associated with weaning weight (P < 0.05), carcass weight (P < 0.05), and thoracic and lumbar back fat (P < 0.01).In addition, we found that the (AC)n variant was closely related with Six1 expression levels and demonstrated this polymorphism on promoter activity by in vitro experiments. Overall, this study provides novel evidence for elucidating the effects of Six1 on porcine production traits as promising candidate and describes two variants with these traits, which are potential reference markers for pig molecular breeding. In addition, our data on the relationship between porcine Six1 expression and the polymorphic (AC)n microsatellite in its promoter may facilitate similar studies in other species.
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Affiliation(s)
- W J Wu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - K Q Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - B J Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - C Dong
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Z K Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - P H Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - R H Huang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - W Wei
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - J Chen
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - H L Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China
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18
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Maruyama S, Wu CL, Yoshida S, Zhang D, Li PH, Wu F, Parker Duffen J, Yao R, Jardin B, Adham IM, Law R, Berger J, Di Marchi R, Walsh K. Relaxin Family Member Insulin-Like Peptide 6 Ameliorates Cardiac Fibrosis and Prevents Cardiac Remodeling in Murine Heart Failure Models. J Am Heart Assoc 2018; 7:e008441. [PMID: 29887522 PMCID: PMC6220528 DOI: 10.1161/jaha.117.008441] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 04/25/2018] [Indexed: 11/21/2022]
Abstract
BACKGROUND The insulin/insulin-like growth factor/relaxin family represents a group of structurally related but functionally diverse proteins. The family member relaxin-2 has been evaluated in clinical trials for its efficacy in the treatment of acute heart failure. In this study, we assessed the role of insulin-like peptide 6 (INSL6), another member of this protein family, in murine heart failure models using genetic loss-of-function and protein delivery methods. METHODS AND RESULTS Insl6-deficient and wild-type (C57BL/6N) mice were administered angiotensin II or isoproterenol via continuous infusion with an osmotic pump or via intraperitoneal injection once a day, respectively, for 2 weeks. In both models, Insl6-knockout mice exhibited greater cardiac systolic dysfunction and left ventricular dilatation. Cardiac dysfunction in the Insl6-knockout mice was associated with more extensive cardiac fibrosis and greater expression of fibrosis-associated genes. The continuous infusion of chemically synthesized INSL6 significantly attenuated left ventricular systolic dysfunction and cardiac fibrosis induced by isoproterenol infusion. Gene expression profiling suggests liver X receptor/retinoid X receptor signaling is activated in the isoproterenol-challenged hearts treated with INSL6 protein. CONCLUSIONS Endogenous Insl6 protein inhibits cardiac systolic dysfunction and cardiac fibrosis in angiotensin II- and isoproterenol-induced cardiac stress models. The administration of recombinant INSL6 protein could have utility for the treatment of heart failure and cardiac fibrosis.
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MESH Headings
- Animals
- Disease Models, Animal
- Fibrosis
- Heart Failure/metabolism
- Heart Failure/pathology
- Heart Failure/physiopathology
- Hypertrophy, Left Ventricular/metabolism
- Hypertrophy, Left Ventricular/pathology
- Hypertrophy, Left Ventricular/physiopathology
- Hypertrophy, Left Ventricular/prevention & control
- Intercellular Signaling Peptides and Proteins
- Intracellular Signaling Peptides and Proteins/deficiency
- Intracellular Signaling Peptides and Proteins/genetics
- Intracellular Signaling Peptides and Proteins/metabolism
- Liver X Receptors/genetics
- Liver X Receptors/metabolism
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Myocardium/metabolism
- Myocardium/pathology
- Retinoid X Receptors/genetics
- Retinoid X Receptors/metabolism
- Signal Transduction
- Ventricular Dysfunction, Left/metabolism
- Ventricular Dysfunction, Left/pathology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Dysfunction, Left/prevention & control
- Ventricular Function, Left
- Ventricular Remodeling
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Affiliation(s)
- Sonomi Maruyama
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Chia-Ling Wu
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Sumiko Yoshida
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Dongying Zhang
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Pei-Hsuan Li
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Fangzhou Wu
- Department of Chemistry, Indiana University, Bloomington, IN
| | - Jennifer Parker Duffen
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Rouan Yao
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Blake Jardin
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
| | - Ibrahim M Adham
- Institute of Human Genetics, University Medical Center Göttingen, Göttingen, Germany
| | - Ronald Law
- New Frontier Science, Takeda Pharmaceuticals International Co, Cambridge, MA
| | - Joel Berger
- New Frontier Science, Takeda Pharmaceuticals International Co, Cambridge, MA
| | | | - Kenneth Walsh
- Molecular Cardiology, Whitaker Cardiovascular Institute Boston University School of Medicine, Boston, MA
- Center for Hematovascular Biology, Robert M. Berne Cardiovascular Research Center, University of Virginia School of Medicine, Charlottesville, VA
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19
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Li PH, Zheng PP, Zhang TF, Wen GY, Shao HB, Luo QP. Fowl adenovirus serotype 4: Epidemiology, pathogenesis, diagnostic detection, and vaccine strategies. Poult Sci 2018; 96:2630-2640. [PMID: 28498980 DOI: 10.3382/ps/pex087] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 03/20/2017] [Indexed: 12/13/2022] Open
Abstract
Fowl adenovirus (FAdV) serotype-4 is highly pathogenic for chickens, especially for broilers aged 3 to 5 wk, and it has emerged as one of the foremost causes of economic losses to the poultry industry in the last 30 years. The liver is a major target organ of FAdV-4 infections, and virus-infected chickens usually show symptoms of hydropericardium syndrome. The virus is very contagious, and it is spread both vertically and horizontally. It can be isolated from infected liver homogenates and detected by several laboratory diagnostic methods (including an agar gel immunodiffusion test, indirect immunofluorescence assays, counterimmunoelectrophoresis, enzyme-linked immunosorbent assays, restriction endonuclease analyses, polymerase chain reaction (PCR), real-time PCR, and high-resolution melting-curve analyses). Although inactivated vaccines have been deployed widely to control the disease, attenuated live vaccines and subunit vaccines also have been developed, and they are more attractive vaccine candidates. This article provides a comprehensive review of FAdV-4, including its epidemiology, pathogenesis, diagnostic detection, and vaccine strategies.
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Affiliation(s)
- P H Li
- Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture), Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China.,Key Laboratory of Special Pathogens and Biosafety, Wuhan Institute of Virology, Chinese Academy of Science, Wuhan, China
| | - P P Zheng
- Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture), Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China.,Hubei Key Laboratory of Animal Embryo and Molecular Breeding, Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China
| | - T F Zhang
- Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture), Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China.,Hubei Key Laboratory of Animal Embryo and Molecular Breeding, Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China
| | - G Y Wen
- Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture), Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China.,Hubei Key Laboratory of Animal Embryo and Molecular Breeding, Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China
| | - H B Shao
- Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture), Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China.,Hubei Key Laboratory of Animal Embryo and Molecular Breeding, Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China
| | - Q P Luo
- Key Laboratory of Prevention and Control Agents for Animal Bacteriosis (Ministry of Agriculture), Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China.,Hubei Key Laboratory of Animal Embryo and Molecular Breeding, Institute of Animal Husbandry and Veterinary Sciences, Hubei Academy of Agricultural Sciences, Special 1, Nanhuyaoyuan, Hongshan District, Wuhan, 430064, China
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20
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Lu FC, Tong Y, Shen P, Liu W, Li PH, Li HQ, Zhou P. [Clear cell carcinoma of the head and face: a study of four cases]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:855-856. [PMID: 29141299 DOI: 10.3760/cma.j.issn.1673-0860.2017.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- F C Lu
- Graduate College of Xuzhou Medical University, Xuzhou 221002, China
| | - Y Tong
- Graduate College of Xuzhou Medical University, Xuzhou 221002, China
| | - P Shen
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - W Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - P H Li
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - H Q Li
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - P Zhou
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
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21
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Li PH, Ko KL, Ho CT, Lau LL, Tsang RK, Cheung TT, Leung WK, Lau CS. Immunoglobulin G4-related disease in Hong Kong: clinical features, treatment practices, and its association with multisystem disease. Hong Kong Med J 2017; 23:446-53. [PMID: 28862143 DOI: 10.12809/hkmj176229] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Immunoglobulin G4-related disease remains an under-recognised and evolving disease. Local data are sparse and previous publications have been limited to individual case reports or case series only. We conducted this study to review the clinical features, treatment practices, and factors associated with multisystem involvement in Hong Kong. We described the clinical features and treatment modalities of the largest cohort of immunoglobulin G4-related disease in our locality thus far. METHODS We retrospectively evaluated all patients with immunoglobulin G4-related disease between January 2003 and December 2015 in Queen Mary Hospital and combined this with patient data extracted from previous local publications. We analysed the clinical features, treatment practices, and factors associated with the number of organ systems involved. RESULTS A total of 104 patients (55 from Queen Mary Hospital and 49 from literature review) were identified. Patients were predominantly older men (mean [standard deviation] age, 61.9 [12.7] years; male-to-female ratio=3:1) and 94.4% had elevated pre-treatment serum immunoglobulin G4 levels. Hepatobiliary and pancreatic system (40.4%), salivary gland (33.7%), lymph node (29.8%), and eye (19.2%) were the most common organ systems involved. Lymphadenopathy was associated with glucocorticoid use (odds ratio=2.65; 95% confidence interval, 1.08-6.54; P=0.034). Pre-treatment serum immunoglobulin G4 levels correlated with the number of organ systems involved (β=0.347; P=0.004) and, specifically, more associated with patients having salivary gland involvement than those without (mean, 1109 mg/dL vs 599 mg/dL; P=0.012). CONCLUSION We identified pre-treatment serum immunoglobulin G4 to be associated with multisystem disease, especially with salivary gland involvement, highlighting its potential for disease prognostication and monitoring. Increased physician awareness and multidisciplinary efforts are required for early diagnosis and optimal management of this masquerading disease.
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Affiliation(s)
- P H Li
- Division of Rheumatology & Clinical Immunology, Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - K L Ko
- Division of Gastroenterology & Hepatology, Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - C Tk Ho
- Division of Rheumatology & Clinical Immunology, Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - L L Lau
- Department of Ear, Nose & Throat, Queen Mary Hospital, Pokfulam, Hong Kong
| | - R Ky Tsang
- Division of Otorhinolaryngology - Head and Neck Surgery, Department of Surgery, Queen Mary Hospital, Pokfulam, Hong Kong
| | - T T Cheung
- Division of Hepatobiliary & Pancreatic Surgery and Liver Transplantation, Department of Surgery, Queen Mary Hospital, Pokfulam, Hong Kong
| | - W K Leung
- Division of Gastroenterology & Hepatology, Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
| | - C S Lau
- Division of Rheumatology & Clinical Immunology, Department of Medicine, Queen Mary Hospital, Pokfulam, Hong Kong
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22
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Lu FC, Cai C, Zhou P, Li PH, Liu W. [One case of conductive deafness caused by pulsatile tinnitus]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 52:388-389. [PMID: 28558461 DOI: 10.3760/cma.j.issn.1673-0860.2017.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- F C Lu
- Graduate College of Xuzhou Medical University, Xuzhou 221002, China
| | - C Cai
- Graduate College of Xuzhou Medical University, Xuzhou 221002, China
| | - P Zhou
- Clinical Medical College of Xuzhou Medical University, Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - P H Li
- Clinical Medical College of Xuzhou Medical University, Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - W Liu
- Clinical Medical College of Xuzhou Medical University, Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
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23
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He LC, Li PH, Ma X, Sui SP, Gao S, Kim SW, Gu YQ, Huang Y, Ding NS, Huang RH. Identification of new single nucleotide polymorphisms affecting total number born and candidate genes related to ovulation rate in Chinese Erhualian pigs. Anim Genet 2016; 48:48-54. [PMID: 27615062 DOI: 10.1111/age.12492] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2016] [Indexed: 01/08/2023]
Abstract
The Chinese Erhualian pig has the highest record for litter size in the world. However, the genetic mechanism of its high prolificacy remains poorly understood. In our study, large phenotypic variations in litter size were found among Erhualian sows. Significant differences in total number born (TNB) and corpora lutea numbers were observed between sows with high and low estimated breeding values (EBVs) for TNB. To identify single nucleotide polymorphisms (SNPs) associated with TNB, a selective genomic scan was conducted on 18 sows representing the top 10% and 18 sows representing the bottom 10% of EBVs of 177 sows using Illumina Porcine SNP60 genotype data. Genome-wide fixation coefficient (FST ) values were calculated for each SNP between the high- and low-EBV groups. A total of 154 SNPs were significantly differentiated loci between the two groups. Of the top 10 highest FST SNPs, rs81399474, rs81400131 and rs81405013 on SSC8 and rs81434499 and rs81434489 on SSC 12 corresponded to previously reported QTL for litter size. The other five SNPs, rs81367039 on SSC2, rs80891106 on SSC7, rs81477883 on SSC12 and rs80938898 and rs80971725 on SSC14, appeared to be novel QTL for TNB. Significant associations between rs81399474 on SSC8 and TNB were confirmed in 313 Erhualian sows. Forty genes were identified around the top 10 highest FST SNPs, of which UCHL1, adjacent to rs81399474, and RPS6KB1 and CLTC, adjacent to rs81434499, have been reported to affect the ovulation rate in pig. The findings can advance understanding of the genetic variations in litter size of pigs.
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Affiliation(s)
- L C He
- Institute of Swine Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - P H Li
- Institute of Swine Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - X Ma
- Institute of Swine Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - S P Sui
- Institute of Swine Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - S Gao
- Institute of Swine Science, Nanjing Agricultural University, Nanjing, 210095, China
| | - S W Kim
- Department of Animal Science, North Carolina State University, Raleigh, NC, 27695, USA
| | - Y Q Gu
- Changzhou Jiaoxi Cooperatives of Erhualian pigs, Changzhou, 213116, China
| | - Y Huang
- Changzhou Jiaoxi Cooperatives of Erhualian pigs, Changzhou, 213116, China
| | - N S Ding
- College of Animal Science and Veterinary Medicine, Jiangxi Agricultural University, Nanchang, 330045, China
| | - R H Huang
- Institute of Swine Science, Nanjing Agricultural University, Nanjing, 210095, China
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24
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Li PH, Chen CC, Liou SW. Candida parapsilosis keratitis treated successfully with topical and oral fluconazole. Taiwan J Ophthalmol 2016; 6:155-157. [PMID: 29018733 PMCID: PMC5525611 DOI: 10.1016/j.tjo.2016.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 04/08/2016] [Accepted: 04/14/2016] [Indexed: 11/25/2022] Open
Abstract
A 73-year-old male patient presented with ocular pain, redness, and blurred vision in the left eye, which had been ongoing for more than 2 months. An oval-shaped paracentral corneal ulcer with stromal infiltration and a mild anterior chamber reaction were found. Despite treatment with empiric antibiotics, the lesion progressed and corneal thinning in the middle area was noted. The culture yielded Candida parapsilosis. We therefore prescribed topical 0.2% fluconazole (FCZ) in combination with oral FCZ as an antifungal treatment, following which the stromal infiltration gradually subsided. Complete epithelial-ization was noted on the 8th day after initiating FCZ therapy. There was no recurrent disease in the subsequent 2 years. Our case demonstrates that topical FCZ 0.2% in combination with oral FCZ can successfully treat C. parapsilosis keratitis and result in a good visual outcome.
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Affiliation(s)
- Pei-Hsuan Li
- Department of Ophthalmology, Taipei City Hospital Renai Branch, Taipei, Taiwan
| | - Chun-Chen Chen
- Department of Ophthalmology, Taipei City Hospital Renai Branch, Taipei, Taiwan.,Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shiow-Wen Liou
- Department of Ophthalmology, Taipei City Hospital Renai Branch, Taipei, Taiwan.,Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan.,Taipei Medical University, Taipei, Taiwan
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25
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Yip MS, Leung HL, Li PH, Cheung CY, Dutry I, Li D, Daëron M, Bruzzone R, Peiris JS, Jaume M. Antibody-dependent enhancement of SARS coronavirus infection and its role in the pathogenesis of SARS. Hong Kong Med J 2016; 22:25-31. [PMID: 27390007] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Affiliation(s)
- M S Yip
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong
| | - H L Leung
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong
| | - P H Li
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong
| | - C Y Cheung
- School of Public Health, The University of Hong Kong
| | - I Dutry
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong
| | - D Li
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong
| | - M Daëron
- Institut Pasteur, Département d'Immunologie, Unité d'Allergologie Moléculaire et Cellulaire, Paris, France; Inserm, Unité 760, Paris, France
| | - R Bruzzone
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong; Institut Pasteur, Department of Cell Biology and Infection, Paris, France
| | - J Sm Peiris
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong
| | - M Jaume
- HKU-Pasteur Research Pole; School of Public Health, The University of Hong Kong
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Jaume M, Yip MS, Kam YW, Cheung CY, Kien F, Roberts A, Li PH, Dutry I, Escriou N, Daeron M, Bruzzone R, Subbarao K, Peiris JSM, Nal B, Altmeyer R. SARS CoV subunit vaccine: antibody-mediated neutralisation and enhancement. Hong Kong Med J 2012; 18 Suppl 2:31-36. [PMID: 22311359] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
1. A SARS vaccine was produced based on recombinant native full-length Spike-protein trimers (triSpike) and efficient establishment of a vaccination procedure in rodents. 2. Antibody-mediated enhancement of SARS-CoV infection with anti-SARS-CoV Spike immune-serum was observed in vitro. 3. Antibody-mediated infection of SARS-CoV triggers entry into human haematopoietic cells via an FcγR-dependent and ACE2-, pH-, cysteine-protease-independent pathways. 4. The antibody-mediated enhancement phenomenon is not a mandatory component of the humoral immune response elicited by SARS vaccines, as pure neutralising antibody only could be obtained. 5. Occurrence of immune-mediated enhancement of SARS-CoV infection raises safety concerns regarding the use of SARS-CoV vaccine in humans and enables new ways to investigate SARS pathogenesis (tropism and immune response deregulation).
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Affiliation(s)
- M Jaume
- HKU-Pasteur Research Centre, 8 Sassoon Road, Hong Kong SAR, China.
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27
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Li R, Yang W, Zhang J, Hirankarn N, Pan HF, Mok CC, Chan TM, Wong RWS, Mok MY, Lee KW, Wong SN, Leung AMH, Li XP, Avihingsanon Y, Lee TL, Ho MHK, Lee PPW, Wong WHS, Wong CM, Ng IOL, Yang J, Li PH, Zhang Y, Zhang L, Li W, Baum L, Kwan P, Rianthavorn P, Deekajorndej T, Suphapeetiporn K, Shotelersuk V, Garcia-Barceló MM, Cherny SS, Tam PKH, Sham PC, Lau CS, Shen N, Lau YL, Ye DQ. Association of CD247 with systemic lupus erythematosus in Asian populations. Lupus 2011; 21:75-83. [PMID: 22004975 DOI: 10.1177/0961203311422724] [Citation(s) in RCA: 26] [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: 01/08/2023]
Abstract
OBJECTIVE Systemic lupus erythematosus (SLE) is a prototypic autoimmune disease with complex genetic inheritance. CD247 (CD3Z, TCRZ) plays a vital role in antigen recognition and signal transduction in antigen-specific immune responses, and is known to be involved in SLE pathogenesis. Weak disease association was reported for genetic variants in this gene in Caucasian studies for SLE, Crohn's disease and systemic sclerosis, but its role as a genetic risk factor was never firmly established. METHODS In this study, using a collection of 612 SLE patients and 2193 controls of Chinese ethnicity living in Hong Kong in a genome-wide study, single nucleotide polymorphisms (SNPs) in and around CD247 were identified as being associated with SLE. The two most significant SNPs in this locus were selected for further replication using TaqMan genotyping assay in 3339 Asian patients from Hong Kong, Mainland China, and Thailand, as well as 4737 ethnically and geographically matched controls. RESULTS The association of CD247 with SLE in Asian populations was confirmed (rs704853: odds ratio [OR] = 0. 81, p = 2.47 × 10(-7); rs858543: OR = 1.10, p = 0.0048). Patient-only analysis suggested that rs704853 is also linked to oral ulcers, hematologic disorders and anti-double-stranded DNA (dsDNA) antibody production. CONCLUSION A significant association between variants in CD247 and SLE was demonstrated in Asian populations. Understanding the involvement of CD247 in SLE may shed new light on disease mechanisms and development of new treatment paradigms.
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Affiliation(s)
- R Li
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, China
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Abstract
PURPOSE To identify factors related to knee flexion after total knee arthroplasty in a Chinese population. METHODS Records of 242 total knee arthroplasties were retrospectively reviewed. The parameters evaluated were age, gender, diagnosis, preoperative knee flexion and extension, preoperative flexion arc, tibiofemoral angle, Knee Society knee score and functional score, and implant design. RESULTS Advanced age, female gender, and good preoperative flexion and flexion arc were related to better postoperative flexion. Postoperative flexion tended to migrate to the middle range despite different ranges of preoperative flexion. Preoperative tibiofemoral malalignment had no significant effect on postoperative flexion. CONCLUSION Contemporary designs of posterior stabilised prostheses with right and left femoral components were superior to older designs.
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Affiliation(s)
- P H Li
- Department of Orthopaedics and Traumatology, Yan Chai Hospital, Hong Kong.
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29
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Li PH, Qu YL, Xu XJ, Zhu YW, Yu T, Chin KC, Mi J, Gao XY, Lim CT, Shen ZX, Wee ATS, Ji W, Sow CH. Synthesis of "cactus" top-decorated aligned carbon nanotubes and their third-order nonlinear optical properties. J Nanosci Nanotechnol 2006; 6:990-5. [PMID: 16736755 DOI: 10.1166/jnn.2006.167] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
We report a new morphology of "cactus" top-decorated aligned carbon nanotubes grown by the PECVD method using pure C2H2 gas. Unlike most previous reports, no additional carrier gas is used for pretreatment. Carbon nanotubes can still grow and maintain the tubular structure underneath the "cactus" tops. It is proposed that the H atoms produced by the dissociation of C2H2 activate the catalyst nanoparticles. Scanning electron microscopy (SEM) shows that the top "cactus" morphology is composed of a large quantity of small nanosheets. Transmission electron microscopy (TEM) reveals the amorphous carbon nature of these "cactus" structures. The formation of these "cactus" structures is possibly due to covalent absorption and reconstruction of carbon atoms on the broken graphite layers of nanotubes produced by the strong ion bombardment under plasma. The third-order optical nonlinearities and nonlinear dynamics are also investigated. The third-order nonlinear susceptibility magnitude /chi(3)/ is found to be 2.2 x 10(-11) esu, and the relaxation process takes place in about 1.8 ps.
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Affiliation(s)
- P H Li
- Department of Physics, BLK S12, Faculty of Science, National University of Singapore
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30
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Zhong NS, Zheng BJ, Li YM, Poon LLM, Xie ZH, Chan KH, Li PH, Tan SY, Chang Q, Xie JP, Liu XQ, Xu J, Li DX, Yuen KY, Peiris JSM, Guan Y. Epidemiology and cause of severe acute respiratory syndrome (SARS) in Guangdong, People's Republic of China, in February, 2003. Lancet 2003; 362:1353-8. [PMID: 14585636 PMCID: PMC7112415 DOI: 10.1016/s0140-6736(03)14630-2] [Citation(s) in RCA: 942] [Impact Index Per Article: 44.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND An epidemic of severe acute respiratory syndrome (SARS) has been associated with an outbreak of atypical pneumonia originating in Guangdong Province, People's Republic of China. We aimed to identify the causative agent in the Guangdong outbreak and describe the emergence and spread of the disease within the province. METHODS We analysed epidemiological information and collected serum and nasopharyngeal aspirates from patients with SARS in Guangdong in mid-February, 2003. We did virus isolation, serological tests, and molecular assays to identify the causative agent. FINDINGS SARS had been circulating in other cities of Guangdong Province for about 2 months before causing a major outbreak in Guangzhou, the province's capital. A novel coronavirus, SARS coronavirus (CoV), was isolated from specimens from three patients with SARS. Viral antigens were also directly detected in nasopharyngeal aspirates from these patients. 48 of 55 (87%) patients had antibodies to SARS CoV in their convalescent sera. Genetic analysis showed that the SARS CoV isolates from Guangzhou shared the same origin with those in other countries, and had a phylogenetic pathway that matched the spread of SARS to the other parts of the world. INTERPRETATION SARS CoV is the infectious agent responsible for the epidemic outbreak of SARS in Guangdong. The virus isolated from patients in Guangdong is the prototype of the SARS CoV in other regions and countries.
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Affiliation(s)
- NS Zhong
- Guangzhou Institute of Respiratory Diseases, Guangzhou Medical College, Guangzhou, Guangdong Province, Peoples Republic of China
| | - BJ Zheng
- Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam, Hong Kong SAR
| | - YM Li
- Guangzhou Institute of Respiratory Diseases, Guangzhou Medical College, Guangzhou, Guangdong Province, Peoples Republic of China
| | - LLM Poon
- Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam, Hong Kong SAR
| | - ZH Xie
- Guangzhou Institute of Respiratory Diseases, Guangzhou Medical College, Guangzhou, Guangdong Province, Peoples Republic of China
| | - KH Chan
- Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam, Hong Kong SAR
| | - PH Li
- Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam, Hong Kong SAR
| | - SY Tan
- Guangzhou Chest Hospital, Guangzhou, Guangdong Province
| | - Q Chang
- Guangzhou Institute of Respiratory Diseases, Guangzhou Medical College, Guangzhou, Guangdong Province, Peoples Republic of China
| | - JP Xie
- Guangzhou Institute of Respiratory Diseases, Guangzhou Medical College, Guangzhou, Guangdong Province, Peoples Republic of China
- Guangzhou Children's Hospital, Guangzhou, Guangdong Province
| | - XQ Liu
- Guangzhou Institute of Respiratory Diseases, Guangzhou Medical College, Guangzhou, Guangdong Province, Peoples Republic of China
| | - J Xu
- Guangzhou Institute of Respiratory Diseases, Guangzhou Medical College, Guangzhou, Guangdong Province, Peoples Republic of China
| | - DX Li
- Guangzhou Chest Hospital, Guangzhou, Guangdong Province
| | - KY Yuen
- Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam, Hong Kong SAR
| | - JSM Peiris
- Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam, Hong Kong SAR
| | - Y Guan
- Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam, Hong Kong SAR
- Correspondence to: Dr Y Guan, Department of Microbiology, University of Hong Kong, University Pathology Building, Queen Mary Hospital, Pokfulam Road, Hong Kong SAR, People's Republic of China
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31
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Guan Y, Zheng BJ, He YQ, Liu XL, Zhuang ZX, Cheung CL, Luo SW, Li PH, Zhang LJ, Guan YJ, Butt KM, Wong KL, Chan KW, Lim W, Shortridge KF, Yuen KY, Peiris JSM, Poon LLM. Isolation and characterization of viruses related to the SARS coronavirus from animals in southern China. Science 2003; 302:276-8. [PMID: 12958366 DOI: 10.1126/science.1087139] [Citation(s) in RCA: 1549] [Impact Index Per Article: 73.8] [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: 11/02/2022]
Abstract
A novel coronavirus (SCoV) is the etiological agent of severe acute respiratory syndrome (SARS). SCoV-like viruses were isolated from Himalayan palm civets found in a live-animal market in Guangdong, China. Evidence of virus infection was also detected in other animals (including a raccoon dog, Nyctereutes procyonoides) and in humans working at the same market. All the animal isolates retain a 29-nucleotide sequence that is not found in most human isolates. The detection of SCoV-like viruses in small, live wild mammals in a retail market indicates a route of interspecies transmission, although the natural reservoir is not known.
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Affiliation(s)
- Y Guan
- Department of Microbiology, The University of Hong Kong, University Pathology Building, Queen Mary Hospital, Hong Kong Special Administrative Region, People's Republic of China.
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32
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Huang HS, Wu MC, Li PH. Expression of steroidogenic enzyme messenger ribonucleic acid and cortisol production in adrenocortical cells isolated from halothane-sensitive and halothane-resistant pigs. J Cell Biochem 2000; 79:58-70. [PMID: 10906755 DOI: 10.1002/1097-4644(2000)79:1<58::aid-jcb60>3.0.co;2-n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Stress susceptibility in pigs is inherited by a single recessive gene (Hal(n)), and homozygous individuals can be identified by exposure to halothane anesthesia. Previous studies have shown that in stress-susceptible pigs, exposure to a high ambient temperature resulted in a twofold increase in corticotropin (ACTH) and lower plasma cortisol. To determine whether there is a fundamental difference in adrenocortical function between halothane-sensitive (HAL-S) and halothane-resistant (HAL-R) pigs, independent of other factors influencing the hypothalamic-pituitary-adrenal (HPA) axis, we compared cortisol responses to ACTH and 8-bromo-cyclic AMP (8-Br-cAMP) in HAL-S and HAL-R pig adrenocortical cells in vitro. We also determined directly the accumulation of four different mRNAs encoding cholesterol side-chain cleavage cytochrome P450 (P450(scc)), 17alpha-hydroxylase cytochrome P450 (P450(17alpha)), 21-hydroxylase cytochrome P450 (P450(c21)) and 11beta-hydroxylase cytochrome P450 (P450(11beta)) in HAL-S pig adrenal cells and compared them to HAL-R pigs. A time- and dose-dependent increase in medium content of cortisol and cAMP was observed after ACTH treatment. 8-Br-cAMP also caused a time- and dose-dependent increase in cortisol production in the medium. Addition of ACTH or 8-Br-cAMP to HAL-S and HAL-R male Lanyu small-ear miniature pig adrenocortical cells increased cortisol production in a dose- and time-related manner. However, cells isolated from HAL-S pigs had a lower cortisol production in response to ACTH or 8-Br-cAMP compared to those from HAL-R pigs. Treatment of cultured cells with 8-Br-cAMP (0.5 mM) for 18 h resulted in a significant increase in P450(scc), P450(17alpha), P450(c21), and P450(11beta) mRNA levels. In the absence of 8-Br-cAMP, the four genes were expressed constitutively in both HAL-S and HAL-R pig adrenal cells. Densitometric scanning of the autoradiograph indicated that the relative amounts of P450(scc) and P450(17(alpha)) mRNAs in HAL-S pig adrenal cells were between 48% and 53% of those detected in HAL-R pig adrenal cells (P < 0.05). No difference in the amounts of P450(c21) and P450(11beta) was seen in HAL-S and HAL-R pig adrenal cells. Addition of 8-Br-cAMP (0.5 mM) resulted in a uniform increase in the levels of all four P450 mRNAs in both HAL-S and HAL-R pig adrenal cells. However, the amounts of P450(scc) mRNA in HAL-S pig adrenal cells were 67% (P < 0.05) of those measured in HAL-R pig adrenal cells, whereas the amounts of P450(17alpha ), P450(c21), and P450(11beta) mRNAs were similar in these cells. Our data suggest an HPA axis defect in HAL-S pigs at the adrenal level. This defect appears to be at the level of P450scc gene expression, which could be partially related to reduced cortisol production by ACTH stimulation.
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Affiliation(s)
- H S Huang
- Department of Physiology, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan, Republic of China
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33
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Jian LC, Li JH, Li PH, Chen TH. An electron microscopic-cytochemical localization of plasma membrane Ca(2+)-ATPase activity in poplar apical bud cells during the induction of dormancy by short-day photoperiods. Cell Res 2000; 10:103-14. [PMID: 10896172 DOI: 10.1038/sj.cr.7290040] [Citation(s) in RCA: 3] [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] [Indexed: 11/08/2022] Open
Abstract
Plasma membrane (PM) Ca2+-ATPase activity in poplar apical bud meristematic cells during short-day (SD)-induced dormancy development was examined by a cerium precipitation EM-cytochemical method. Ca2+-ATPase activity, indicated by the status of cerium phosphate precipitated grains, was localized mainly on the interior face (cytoplasmic side) of the PM when plants were grown under long days and reached a deep dormancy. A few reaction products were also observed on the nuclear envelope. When plant buds were developing dormancy after 28 to 42 d of SD exposure, almost no reaction products were present on the interior face of the PM. In contrast, a large number of cerium phosphate precipitated grains were distributed on the exterior face of the PM. After 70 d of SD exposure, when buds had developed a deep dormancy, the reaction products of Ca2+-ATPase activity again appeared on the interior face of the PM. The results seemed suggesting that two kinds of Ca2+-ATPases may be present on the PM during the SD-induced dormancy in poplar. One is the Ca2+-pumping ATPase, which is located on the interior face of the PM, for maintaining and restoring the Ca2+ homeostasis. The other might be an ecto-Ca2+-ATPase, which is located on the exterior face of the PM, for the exocytosis of cell wall materials as suggested by the fact of the cell wall thickening during the dormancy development in poplar.
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Affiliation(s)
- L C Jian
- Department of Horticultural Science, University of Minnesota, St. Paul 55108, USA
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34
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Li PH, Chang HS, Huang HY, Lin JS. Guillain-Barré syndrome presenting with severe pain: report of one case. Acta Paediatr Taiwan 2000; 41:33-5. [PMID: 10910557] [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: 02/17/2023]
Abstract
Most neurologists are familiar with pain in Guillain-Barré syndrome but some pediatricians may still miss or underestimate it. We report a 10-year-old girl who presented with headache and numbness in lower extremities. On examination, she could walk and showed hyporeflexia, mild muscle weakness, prominent neck rigidity and right facial nerve palsy. Headache and pain in neck, low back and calves were so severe that she could not fall asleep and the response to analgesic was very poor. On 8th day of illness, she needed mechanical ventilation and suffered tetraplegia. Symptoms of autonomic dysfunction including hypertension and sinus tachycardia appeared thereafter and lasted for a week. After receiving a high dose of intravenous immunoglobulin (2 g/kg in 2 days), her condition improved gradually although joint pain persisted for about three weeks. She could walk unaided by day 40 and run by day 70, and recovered completely 6 months later. We emphasize that pain in GBS needs proper evaluation and management in children as well as in adults.
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Affiliation(s)
- P H Li
- Department of Pediatrics, Mennonite Christian Hospital, Hualien, Taiwan
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35
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Li PH, Ma JS, Chi CS, Mak SC. Intermittent form of maple syrup urine disease: report of one case. Zhonghua Min Guo Xiao Er Ke Yi Xue Hui Za Zhi 1997; 38:468-71. [PMID: 9473820] [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: 02/06/2023]
Abstract
We present a Chinese female infant with an intermittent form of MSUD whose early development was relatively well. A total of three episodes of stupor and metabolic acidosis developed with a concurrent illness after the age of 13 months. The initial analyses of plasma amino acid and urinary organic acid were normal. Initially, an abnormal oral glucose lactate stimulation test and high signal in the bilateral globus pallidus over T2-weighted brain MRI led us to suspect a mitochondrial disorder. The final diagnosis was made after the patient died at 31 months of age.
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Affiliation(s)
- P H Li
- Department of Pediatrics, Taichung Veterans General Hospital, Taiwan, R.O.C
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36
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Huang BM, Stocco DM, Li PH, Yang HY, Wu CM, Norman RL. Corticotropin-releasing hormone stimulates the expression of the steroidogenic acute regulatory protein in MA-10 mouse cells. Biol Reprod 1997; 57:547-51. [PMID: 9282989 DOI: 10.1095/biolreprod57.3.547] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We have previously demonstrated that corticotropin-releasing hormone (CRH) treatment of MA-10 mouse Leydig tumor cells results in a dose-dependent stimulation of progesterone production. In view of this observation we wished to determine the effects of CRH on the synthesis of the steroidogenic acute regulatory (StAR) protein in these cells. StAR is a steroidogenic tissue-specific, hormone-induced, rapidly synthesized protein previously shown to be involved in the acute regulation of steroidogenesis, probably by promoting the transfer of cholesterol to the inner mitochondrial membrane and the cytochrome P450 side-chain cleavage enzyme. Treatment of MA-10 cells with the cAMP analogue dibutyryl cAMP (dbcAMP) resulted in a dose- and time-dependent increase in the levels of StAR protein that reached a maximum at 800 microM dbcAMP and within a time period of 6 h. Further, treatment of MA-10 cells with CRH also resulted in a dose-dependent increase in the synthesis of the StAR protein with a maximal response observed at 1 microM. Slightly different from that observed with dbcAMP, the maximal response to 1 microM CRH was seen at 4 h following stimulation. These results indicate that the observed increase in steroid production in response to CRH in MA-10 Leydig tumor cells is similar to that previously seen with trophic hormone stimulation acting through the cAMP second messenger pathway, and that it occurs as a result of an increase in the synthesis of the StAR protein.
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Affiliation(s)
- B M Huang
- Department of Anatomy, Medical College, National Cheng Kung University, Tainan, Taiwan, Republic of China
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37
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Li PH, Chi CS, Mak SC, Chen CH, Yang MT. Clinical analysis of 22 infants with afebrile cluster seizures. Zhonghua Min Guo Xiao Er Ke Yi Xue Hui Za Zhi 1997; 38:203-7. [PMID: 9230537] [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: 02/04/2023]
Abstract
The inclusion criteria for afebrile cluster seizures in infancy are defined as follows: (1) frequency of afebrile seizures at least 2 episodes within 72 hours; (2) seizure onset between 2 months and 3 years of age; (3) excluding febrile convulsion, central nervous system infections, status epilepticus, well-known epileptic syndromes in infancy (e.g. early myoclonic encephalopathy, early infantile epileptic encephalopathy, benign myoclonic epilepsy, infantile spasms. Lennox-Gastaut syndrome), electrolyte imbalance, watery diarrhea, head injury and intoxication. From 1986 to 1996, retrospectively and prospectively 22 patients were collected who fulfilled the above criteria. Based on whether or not a strong family history was present and a history of mild diarrhea was associated with seizure onset, they were divided into three groups: Group I, benign infantile familial convulsions (4 patients); Group II, cluster seizures with mild diarrhea in infancy (5 patients); Group III, cluster seizures without diarrhea in infancy (13 patients). Before seizure onset and during follow-up, all of the patients had normal development. The seizure pattern in all was generalized, most tonic type with duration of seizure less than five minutes in the majority. Recurrence rate was 100% in Group I and no recurrence in Group II. In 16 patients who were seizure-free over 12 months, the duration of persistence varied from 1 day to 8 months, and was shortest in Group II (range, 1 to 3 days). It was concluded that the vast majority of afebrile cluster seizures in infancy are benign in nature. Whether anticonvulsant therapy is justified must be individualized.
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Affiliation(s)
- P H Li
- Department of Pediatrics, Taichung Veterans General Hospital, Taiwan, R.O.C
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Abstract
Avian influenza A viruses from Asia are recognized as the source of genes that reassorted with human viral genes to generate the Asian/57 (H2N2) and Hong Kong/68 (H3N2) pandemic strains earlier in this century. Here we report the genetic analysis of avian influenza A H1N1 viruses recently isolated from pigs in southern China, a host suspected to generate new pandemic strains through gene reassortment events. Each of the eight gene segments was of avian origin. Phylogenetic analysis indicates that these genes form an Asian sublineage of the Eurasian avian lineage, suggesting that these viruses are an independent introduction into pigs in Asia. The presence of avian influenza viruses in pigs in China places them in an optimal position for transmission to humans and may serve as an early warning of the emergence of the next human influenza virus pandemic.
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Affiliation(s)
- Y Guan
- Department of Virology/Molecular Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
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39
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Abstract
We present a 6-year-old Chinese boy with Alagille syndrome and an interstitial 20p deletion, with a karyotype of 46,XY,der(20)dir ins(7;20)(q11.23;p11.23p12.2 or p12.2p13)mat. He had a peculiar face and suffered from congenital heart disease, growth retardation, severe cholestasis, hepatosplenomegaly, and impaired renal function. The karyotype of his mother showed a balanced translocation, 46,XX,dir ins(7;20)(q11.23; p11.23p12.2 or p12.2p13), and her phenotype was normal. His dead elder brother was highly suspected as another victim of Alagille syndrome. The findings in the present family suggested that if Alagille syndrome is a single gene defect, the putative gene responsible for the syndrome would not be located at the insertion breakpoints but located within the deletion extent.
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Affiliation(s)
- P H Li
- Department of Pediatrics, Taichung Veterans General Hospital, Taiwan, Republic of China
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40
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Zhu B, Chen TH, Li PH. Analysis of late-blight disease resistance and freezing tolerance in transgenic potato plants expressing sense and antisense genes for an osmotin-like protein. Planta 1996; 198:70-77. [PMID: 8580772 DOI: 10.1007/bf00197588] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The expression patterns of plant defense genes encoding osmotin and osmotin-like proteins imply a dual function in osmotic stress and plant pathogen defense. We have produced transgenic potato (Solanum commersonii Dun.) plants constitutively expressing sense or antisense RNAs from chimeric gene constructs consisting of the cauliflower mosaic virus 35S promoter and a cDNA (pA13) for an osmotin-like protein. Transgenic potato plants expressing high levels of the pA13 osmotin-like protein showed an increased tolerance to the late-blight fungus Phytophthora infestans at various phases of infection, with a greater resistance at an early phase of fungal infection. There was a decrease in the accumulation of osmotin-like mRNAs and proteins when antisense transformants were challenged by fungal infection, although the antisense transformants did not exhibit any alterations in disease susceptibility. Expression of pA13 sense and antisense RNAs had no effect on the development of freezing tolerance in transgenic plants when assayed under a variety of conditions including treatments with abscisic acid or low temperature. These results provide evidence of antifungal activity for a potato osmotin-like protein against the fungus P. infestans, but do not indicate that pA13 osmotin-like protein is a major determinant of freezing tolerance.
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Affiliation(s)
- B Zhu
- Department of Horticultural Sciences, University of Minnesota, St. Paul 55108, USA. zhub@uacrac 1.ucr.edu
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Zhu B, Chen TH, Li PH. Activation of two osmotin-like protein genes by abiotic stimuli and fungal pathogen in transgenic potato plants. Plant Physiol 1995; 108:929-37. [PMID: 7630973 PMCID: PMC157442 DOI: 10.1104/pp.108.3.929] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Osmotin-like proteins are encoded by at least six members of a multigene family in Solanum commersonii. A genomic clone (lambda pGEM2a-7) that contains two osmotin-like protein genes (OSML13 and OSML81) arranged in the same transcriptional orientation has been isolated. Restriction mapping and sequence analysis indicated that the two intronless genes correspond to the previously characterized pA13 and pA81 cDNAs. To study the transcriptional activation of OSML13 and OSML81 promoters, the 5' flanking DNA sequence (-1078 to +35 of OSML13 and -1054 to +41 of OSML81) was fused to the beta-glucoronidase (GUS) coding region, and the chimeric gene fusions were introduced into wild potato (S. commersonii) plants via Agrobacterium-mediated transformation. Analysis of the chimeric gene expression in transgenic potato plants showed that both 5' flanking DNA sequences are sufficient to impart GUS inducibility by abscisic acid, NaCl, salicylic acid, wounding, and fungal infection. Low temperature activated both chimeric genes only slightly. Infection with Phytophthora infestans resulted in strong GUS expression from both chimeric genes primarily in the sites of pathogen invasion, suggesting a limited diffusion of fungal infection-mediated signals. The expression patterns of both osmotin-like protein genes implicate their dual functions in osmotic stress and plant pathogen defense.
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Affiliation(s)
- B Zhu
- Department of Horticultural Sciences, University of Minnesota, St Paul 55108, USA
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Abstract
Equine-2 influenza virus A (H3N8) infection occurred among vaccinated thoroughbred horses in Hong Kong during November and December 1992. The outbreak was unique in that it occurred among a large population stabled under intensive conditions. It resulted in the postponement of seven race meetings over a period of 32 days. The outbreak originated after the importation of horses 25 to 32 days before any clinical signs were reported. Vaccination did not prevent 75 per cent of the population from becoming infected, and half the infected horses developed clinical signs. Vaccination did, however, contribute to reducing the morbidity and the severity and duration of the clinical signs.
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Affiliation(s)
- D G Powell
- Gluck Equine Research Center, Department of Veterinary Science, University of Kentucky, Lexington 40546-0099, USA
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Zhu B, Chen TH, Li PH. Expression of three osmotin-like protein genes in response to osmotic stress and fungal infection in potato. Plant Mol Biol 1995; 28:17-26. [PMID: 7787181 DOI: 10.1007/bf00042034] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We have characterized three cDNAs encoding osmotin-like proteins from potato (Solanum commersonii) cell cultures. These cDNAs (pA13, pA35, and pA81) have extensive nucleotide identity in the coding regions but low homology in the 3' non-coding sequences, and may encode three isoforms of potato pathogenesis-related (PR) type 5 proteins. Using gene-specific probes, RNA gel blot analyses showed constitutive accumulation of osmotin-like protein mRNAs in cell cultures, leaves, stems, roots and flowers, with high abundance in the roots and mature flowers. Treatments with abscisic acid (ABA), low temperature, and NaCl increased the accumulation of all three mRNAs in S. commersonii cell cultures and plants grown in vitro. Salicylic acid (SA), and wounding resulted in a moderate increase in the levels of pA13 and pA81 but not pA35 mRNAs. Infection with the fungus Phytophthora infestans activated strong and non-systemic expression of all three osmotin-like protein genes. The accumulation of osmotin-like proteins, however, was detected only in P. infestans-infected tissues but not in plants treated with ABA, SA, NaCl, low temperature, or wounding.
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Affiliation(s)
- B Zhu
- Department of Horticultural Sciences, University of Minnesota, St. Paul 55108, USA
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Abstract
The Directigen FLU-A enzyme immunoassay was tested for its ability to detect equine-2 influenza viruses in nasopharyngeal fluids from horses and ponies. A total of 125 swabs from experimental infections and from different sources of natural infection in the USA and Hong Kong were examined. The assay results were compared with the results of standard virus culture in embryonated chicken eggs or Madin-Darby canine kidney cells, and with the serology of the horses sampled. In comparison with virus culture the enzyme immunoassay exhibited 83 per cent sensitivity, 78 per cent specificity, 70 per cent positive predictive value and 88 per cent negative predictive value. The test appeared to be more sensitive than haemagglutination for the detection of low levels of virus in embryonated egg cultures. It also detected equine-1 influenza virus in culture. The test is rapid (15 minutes), simple, and should be a convenient method for the rapid diagnosis and screening of horses for equine influenza infection.
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Affiliation(s)
- T M Chambers
- Department of Veterinary Science, University of Kentucky, Lexington 40546
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Hsu C, Lee JN, Ho ML, Cheng BH, Li PH, Yu JY. The facilitatory effect of N-methyl-D-aspartate on sexual receptivity in female rats through GnRH release. Acta Endocrinol (Copenh) 1993; 128:385-8. [PMID: 8498158 DOI: 10.1530/acta.0.1280385] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The purpose of this study was to examine whether N-methyl-D-aspartate affects the sexual receptivity of female rats. Monosodium L-glutamate was used as a neurotoxin to induce hypogonadal status. Matured normal and monosodium L-glutamate-treated rats were ovariectomized and implanted subcutaneously with estradiol capsules. One week later, lordosis responsiveness was observed before and 10 min after N-methyl-D-aspartate (40 mg/kg of BW, ip) administration. The results showed that N-methyl-D-aspartate caused a remarkable increase of lordosis quotient in control rats but not in monosodium L-glutamate-treated rats. Moreover, the possible action site of N-methyl-D-aspartate in the enhancement of receptivity was evaluated by the post-castrational LH rise, pituitary LH release in response to GnRH, and N-methyl-D-aspartate-evoked GnRH releasability. The results revealed that: (a) serum levels of LH in monosodium L-glutamate-treated rats were lower (p < 0.01) than those of control rats after ovariectomy; (b) there was no significant difference of pituitary LH release responsiveness to GnRH test between two groups; and (c) N-methyl-D-aspartate-evoked LH release in monosodium L-glutamate-treated rats was similar to that in the control rats. In conclusion, N-methyl-D-aspartate may facilitate the sexual receptivity through stimulating GnRH release. The failure of N-methyl-D-aspartate in enhancing receptivity in monosodium L-glutamate-treated rats is probably due to the cellular damage by monosodium L-glutamate on specific areas responsible for lordosis.
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Affiliation(s)
- C Hsu
- Department of Physiology, Kaohsiung Medical College, Taiwan, ROC
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Zhu B, Chen TH, Li PH. Expression of an ABA-responsive osmotin-like gene during the induction of freezing tolerance in Solanum commersonii. Plant Mol Biol 1993; 21:729-735. [PMID: 8448373 DOI: 10.1007/bf00014558] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We have isolated a cDNA (pA13) of an ABA-responsive gene from suspension cultures of Solanum cultures of Solanum commersonii. The deduced amino acid sequence of pA13 cDNA revealed 89 and 91% identity with tobacco osmotin and tomato NP24 protein, respectively. The accumulation of the transcript corresponding to pA13 cDNA was regulated by ABA, cold temperature, and low water potential treatments. Cold-induced accumulation of the pA13 transcript was partially suppressed by fluridone, an ABA synthesis inhibitor, and the suppression was restored by exogenous ABA application. The transcript corresponding to pA13 also accumulated in an organ-specific manner in response to ABA or cold treatment.
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Affiliation(s)
- B Zhu
- Department of Horticultural Sciences, University of Minnesota, St. Paul 55108
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Abstract
This study investigated the direct effects of hydrocortisone (HS), corticotropin-releasing factor (CRF), and adrenocorticotropin (ACTH) on basal and gonadotropin-releasing hormone (GnRH)-stimulated secretion of follicle-stimulating hormone (FSH) from dispersed pig pituitary cells in vitro. Pig pituitaries were dispersed into cells with collagenase, DNAase, and hyaluronidase and then cultured in McCoy's 5a medium containing horse serum (10%) and fetal calf serum (2.5%) pretreated with dextran-coated charcoal for 3 days. Cells were preincubated with steroids, CRF, or ACTH before GnRH was added. HS did not affect basal FSH secretion after 72 h of incubation. Treatment of pituitary cells with increasing concentrations (0.001-800 micrograms/ml) of HS for 72 h resulted in a dose-dependent decrease in GnRH-stimulated FSH release. HS pretreatment did not cause a change in cellular FSH content. Increasing duration (6-72 h) of treatment with HS (200 micrograms/ml) led to a time-dependent decrease in GnRH-stimulated FSH release, achieving statistical significance by 12 h. Porcine ACTH had no influence on basal and GnRH-stimulated FSH secretion. CRF decreased GnRH-stimulated FSH secretion in a dose-dependent manner, and the inhibitory effect required preincubation (6-18 h) with CRF. HS inhibited the FSH secretory responses to phospholipase C, melittin, and 8-bromo-cAMP but did not affect the response to 1,2-dioctanoyl-sn-glycerol and ionophore A23187. These results indicate that both cortisol and CRF can act directly on pig pituitary to inhibit FSH responsiveness to GnRH.
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Affiliation(s)
- P H Li
- Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
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Ryu SB, Li PH, Brenner ML. An enzyme-immunoassay of abscisic acid in potato (Solanum commersonii) cultured cells. Plant Cell Rep 1992; 12:34-36. [PMID: 24201727 DOI: 10.1007/bf00232419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/1992] [Revised: 06/01/1992] [Indexed: 06/02/2023]
Abstract
Estimation of abscisic acid (ABA) content in potato (Solanum commersonii) suspension-cultured cells with an enzyme-immunoassay (EIA) was investigated. In crude extracts of potato cultured cells or even after simple clean-up using C18 cartridge, EIA based on commercial monoclonal antibodies (Idetek, Inc) failed to detect any ABA content. An interference could be removed by partitioning against ethyl acetate after the C18 cartridge so that the EIA yielded an estimate of ABA similar to that determined by high pressure liquid chromatography and gas chromatography-mass spectrometry analysis. These results demonstrate the presence of metabolites in potato cultured cell extract that prevent the binding of ABA to its binding site but not the binding of tracer.
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Affiliation(s)
- S B Ryu
- Laboratory of Plant Hardiness, Department of Horticultural Science and Plant Biological Sciences Program, University of Minnesota, 55108, St. Paul, Minnesota, USA
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49
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Abstract
The induction of chilling tolerance by abscisic acid (ABA) in maize (Zea mays L. cv Black Mexican Sweet) suspension cultured cells was examined. Cell viability during exposure to chilling was estimated by triphenyl tetrazolium chloride reduction immediately after chilling and a filter paper growth assay. Both methods yielded comparable results. Chilling tolerance was induced by transferring 5-day-old cultures (late log phase) to a fresh medium containing ABA (10 to 100 micromolar). The greatest chilling tolerance was achieved with ABA at 100 micromolar. Growth of cells was inhibited at this concentration. After a 7-day exposure to 4 degrees C in the dark, the survival of ABA-treated cells (100 micromolar ABA, 28 degrees C for 24 h in the dark) was sevenfold greater than untreated cells. Effective induction of chilling tolerance was first observed when cells were held at 28 degrees C for 6 hours after adding ABA. No tolerance was induced if the culture was chilled at the inception of ABA treatment. Induction of chilling tolerance was inhibited by cycloheximide. These results indicate that ABA is capable of inducing chilling tolerance when ABA-treated cells are incubated at a warm temperature before exposure to chilling, and this induction requires de novo synthesis of proteins.
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Affiliation(s)
- Z Xin
- Laboratory of Plant Hardiness, Department of Horticultural Science, University of Minnesota, St. Paul, Minnesota 55108
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50
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Abstract
This study investigated the direct effect of catecholamines, epinephrine (EPI), and norepinephrine (NE) on basal and gonadotropin-releasing hormone (GnRH)-stimulated secretion of luteinizing hormone (LH) from dispersed pig pituitary cells in vitro. Pig pituitaries were dispersed into cells with collagenase and DNAase and then cultured in McCoy's 5a medium containing horse serum (10%) and fetal calf serum (2.5%) pretreated with dextran-coated charcoal for 3 days. EPI and NE did not affect basal LH secretion after 4 h of incubation. When pituitary cells were incubated with EPI or NE (1 microgram/ml) for longer than 30 min, GnRH-stimulated LH secretion was reduced. The degree of this reduction was dependent on EPI and NE, and a concentration of EPI and NE higher than 1 ng/ml and 100 ng/ml, respectively, was needed. L-isoproterenol, a nonselective beta-agonist, also inhibited the LH response to GnRH. Propranolol, a beta-antagonist, blocked the inhibitory effect of EPI, whereas phentolamine, an alpha-antagonist, had no effect. These results suggest that catecholamines, acting by a beta 2-adrenergic receptor, may play a role in the control of the porcine pituitary gonadotrope's response to GnRH.
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Affiliation(s)
- P H Li
- Department of Physiology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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