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Ng WY, Thoe W, Yang R, Cheung WP, Chen CK, To KH, Pak KM, Leung HW, Lai WK, Wong TK, Lau TK, Au KW, Xu XQ, Zheng XW, Deng Y, Lau YK, To CK, Peiris M, Leung GM, Zhang T, Yang M, An W, Chen W, Wang C, Chui HK. The city-wide full-scale interactive application of sewage surveillance programme for assisting real-time COVID-19 pandemic control - A case study in Hong Kong. Sci Total Environ 2023; 875:162661. [PMID: 36898549 PMCID: PMC9991928 DOI: 10.1016/j.scitotenv.2023.162661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/22/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
The paper discusses the implementation of Hong Kong's tailor-made sewage surveillance programme led by the Government, which has demonstrated how an efficient and well-organized sewage surveillance system can complement conventional epidemiological surveillance to facilitate the planning of intervention strategies and actions for combating COVID-19 pandemic in real-time. This included the setting up of a comprehensive sewerage network-based SARS-CoV-2 virus surveillance programme with 154 stationary sites covering 6 million people (or 80 % of the total population), and employing an intensive monitoring programme to take samples from each stationary site every 2 days. From 1 January to 22 May 2022, the daily confirmed case count started with 17 cases per day on 1 January to a maximum of 76,991 cases on 3 March and dropped to 237 cases on 22 May. During this period, a total of 270 "Restriction-Testing Declaration" (RTD) operations at high-risk residential areas were conducted based on the sewage virus testing results, where over 26,500 confirmed cases were detected with a majority being asymptomatic. In addition, Compulsory Testing Notices (CTN) were issued to residents, and the distribution of Rapid Antigen Test kits was adopted as alternatives to RTD operations in areas of moderate risk. These measures formulated a tiered and cost-effective approach to combat the disease in the local setting. Some ongoing and future enhancement efforts to improve efficacy are discussed from the perspective of wastewater-based epidemiology. Forecast models on case counts based on sewage virus testing results were also developed with R2 of 0.9669-0.9775, which estimated that up to 22 May 2022, around 2,000,000 people (~67 % higher than the total number of 1,200,000 reported to the health authority, due to various constraints or limitations) had potentially contracted the disease, which is believed to be reflecting the real situation occurring in a highly urbanized metropolis like Hong Kong.
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Affiliation(s)
- Wai-Yin Ng
- Environmental Protection Department, Hong Kong SAR Government, China
| | - Wai Thoe
- Environmental Protection Department, Hong Kong SAR Government, China
| | - Rong Yang
- Environmental Protection Department, Hong Kong SAR Government, China
| | - Wai-Ping Cheung
- Environmental Protection Department, Hong Kong SAR Government, China
| | - Che-Kong Chen
- Environmental Protection Department, Hong Kong SAR Government, China
| | - King-Ho To
- Environmental Protection Department, Hong Kong SAR Government, China
| | - Kan-Ming Pak
- Drainage Service Department, Hong Kong SAR Government, China
| | - Hon-Wan Leung
- Drainage Service Department, Hong Kong SAR Government, China
| | - Wai-Kwan Lai
- Drainage Service Department, Hong Kong SAR Government, China
| | - Tsz-Kin Wong
- Drainage Service Department, Hong Kong SAR Government, China
| | - Tat-Kwong Lau
- Drainage Service Department, Hong Kong SAR Government, China
| | - Ka-Wing Au
- Centre for Health Protection, Department of Health, Hong Kong SAR Government, China
| | - Xiao-Qing Xu
- Department of Civil Engineering, The University of Hong Kong, China
| | - Xia-Wan Zheng
- Department of Civil Engineering, The University of Hong Kong, China
| | - Yu Deng
- Department of Civil Engineering, The University of Hong Kong, China
| | - Yan-Kin Lau
- CMA Industrial Development Foundation Limited, Hong Kong, China
| | - Chi-Kai To
- CMA Industrial Development Foundation Limited, Hong Kong, China
| | - Malik Peiris
- School of Public Health, The University of Hong Kong, China
| | | | - Tong Zhang
- Department of Civil Engineering, The University of Hong Kong, China
| | - Min Yang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Wei An
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Wenxiu Chen
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Chen Wang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Ho-Kwong Chui
- Environmental Protection Department, Hong Kong SAR Government, China; Hong Kong University of Science and Technology, China.
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Ng KM, Ding Q, Tse YL, Chou OHI, Lai WH, Au KW, Lau YM, Ji Y, Siu CW, Tang CSM, Colman A, Tsang SY, Tse HF. Isogenic Human-Induced Pluripotent Stem-Cell-Derived Cardiomyocytes Reveal Activation of Wnt Signaling Pathways Underlying Intrinsic Cardiac Abnormalities in Rett Syndrome. Int J Mol Sci 2022; 23:ijms232415609. [PMID: 36555252 PMCID: PMC9779632 DOI: 10.3390/ijms232415609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 11/28/2022] [Accepted: 12/06/2022] [Indexed: 12/13/2022] Open
Abstract
Rett syndrome (RTT) is a severe neurodevelopmental disorder caused by MeCP2 mutations. Nonetheless, the pathophysiological roles of MeCP2 mutations in the etiology of intrinsic cardiac abnormality and sudden death remain unclear. In this study, we performed a detailed functional studies (calcium and electrophysiological analysis) and RNA-sequencing-based transcriptome analysis of a pair of isogenic RTT female patient-specific induced pluripotent stem-cell-derived cardiomyocytes (iPSC-CMs) that expressed either MeCP2wildtype or MeCP2mutant allele and iPSC-CMs from a non-affected female control. The observations were further confirmed by additional experiments, including Wnt signaling inhibitor treatment, siRNA-based gene silencing, and ion channel blockade. Compared with MeCP2wildtype and control iPSC-CMs, MeCP2mutant iPSC-CMs exhibited prolonged action potential and increased frequency of spontaneous early after polarization. RNA sequencing analysis revealed up-regulation of various Wnt family genes in MeCP2mutant iPSC-CMs. Treatment of MeCP2mutant iPSC-CMs with a Wnt inhibitor XAV939 significantly decreased the β-catenin protein level and CACN1AC expression and ameliorated their abnormal electrophysiological properties. In summary, our data provide novel insight into the contribution of activation of the Wnt/β-catenin signaling cascade to the cardiac abnormalities associated with MeCP2 mutations in RTT.
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Affiliation(s)
- Kwong-Man Ng
- Cardiology Division, Department of Medicine, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
- Center for Translational Stem Cell Biology, Hong Kong SAR, China
| | - Qianqian Ding
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yiu-Lam Tse
- Cardiology Division, Department of Medicine, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Oscar Hou-In Chou
- Cardiology Division, Department of Medicine, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Wing-Hon Lai
- Cardiology Division, Department of Medicine, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ka-Wing Au
- Cardiology Division, Department of Medicine, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Yee-Man Lau
- Cardiology Division, Department of Medicine, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Yue Ji
- Department of Surgery, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Chung-Wah Siu
- Cardiology Division, Department of Medicine, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Clara Sze-Man Tang
- Department of Surgery, Li Ka-Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
- Dr. Li Dak-Sum Research Centre, The University of Hong Kong, Hong Kong SAR, China
| | - Alan Colman
- Harvard Department of Stem Cells and Regenerative Biology, Cambridge, MA 02138, USA
| | - Suk-Ying Tsang
- School of Life Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
- State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Institute for Tissue Engineering and Regenerative Medicine (iTERM), The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Hung-Fat Tse
- Center for Translational Stem Cell Biology, Hong Kong SAR, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong SAR, China
- Heart and Vascular Center, The University of Hong Kong-Shenzhen Hospital, Shenzhen 518053, China
- Correspondence:
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Wei R, Yang J, Cheng CW, Ho WI, Li N, Hu Y, Hong X, Fu J, Yang B, Liu Y, Jiang L, Lai WH, Au KW, Tsang WL, Tse YL, Ng KM, Esteban MA, Tse HF. CRISPR-targeted genome editing of human induced pluripotent stem cell-derived hepatocytes for the treatment of Wilson's disease. JHEP Rep 2021; 4:100389. [PMID: 34877514 PMCID: PMC8633686 DOI: 10.1016/j.jhepr.2021.100389] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 09/28/2021] [Accepted: 10/18/2021] [Indexed: 02/07/2023]
Abstract
Background & Aims Wilson’s disease (WD) is an autosomal recessive disorder of copper metabolism caused by loss-of-function mutations in ATP7B, which encodes a copper-transporting protein. It is characterized by excessive copper deposition in tissues, predominantly in the liver and brain. We sought to investigate whether gene-corrected patient-specific induced pluripotent stem cell (iPSC)-derived hepatocytes (iHeps) could serve as an autologous cell source for cellular transplantation therapy in WD. Methods We first compared the in vitro phenotype and cellular function of ATP7B before and after gene correction using CRISPR/Cas9 and single-stranded oligodeoxynucleotides (ssODNs) in iHeps (derived from patients with WD) which were homozygous for the ATP7B R778L mutation (ATP7BR778L/R778L). Next, we evaluated the in vivo therapeutic potential of cellular transplantation of WD gene-corrected iHeps in an immunodeficient WD mouse model (Atp7b-/-/ Rag2-/-/ Il2rg-/-; ARG). Results We successfully created iPSCs with heterozygous gene correction carrying 1 allele of the wild-type ATP7B gene (ATP7BWT/-) using CRISPR/Cas9 and ssODNs. Compared with ATP7BR778L/R778L iHeps, gene-corrected ATP7BWT/- iHeps restored in vitro ATP7B subcellular localization, its subcellular trafficking in response to copper overload and its copper exportation function. Moreover, in vivo cellular transplantation of ATP7BWT/- iHeps into ARG mice via intra-splenic injection significantly attenuated the hepatic manifestations of WD. Liver function improved and liver fibrosis decreased due to reductions in hepatic copper accumulation and consequently copper-induced hepatocyte toxicity. Conclusions Our findings demonstrate that gene-corrected patient-specific iPSC-derived iHeps can rescue the in vitro and in vivo disease phenotypes of WD. These proof-of-principle data suggest that iHeps derived from gene-corrected WD iPSCs have potential use as an autologous ex vivo cell source for in vivo therapy of WD as well as other inherited liver disorders. Lay summary Gene correction restored ATP7B function in hepatocytes derived from induced pluripotent stem cells that originated from a patient with Wilson’s disease. These gene-corrected hepatocytes are potential cell sources for autologous cell therapy in patients with Wilson’s disease. Correction of the ATP7B R778L mutation restored the subcellular localization of ATP7B in iHeps. The copper exportation capability of ATP7B was restored in gene-corrected iHeps. Gene-corrected iHeps reduced hepatic copper accumulation and copper-induced hepatic toxicity in mice with Wilson’s disease. Gene-corrected iHeps are potential ex vivo cell sources for therapy in Wilson’s disease.
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Key Words
- AFP, alpha-fetoprotein
- ALB, albumin
- ATP7B, ATPase copper transporting beta
- ATPase copper transporting beta polypeptide (ATP7B)
- Clustered regularly interspaced palindromic repeats (CRISPR)/Cas9
- EB, embryoid body
- RFLP, restriction fragment length polymorphism
- Single-stranded Oligodeoxynucleotide (ssODN)
- TGN, trans-Golgi network
- WD, Wilson’s disease
- Wilson’s disease
- cell therapy
- gene correction
- iHep(s), iPSC-derived hepatocyte(s)
- iPSC, induced pluripotent stem cell
- iPSC-derived hepatocytes (iHeps)
- induced pluripotent stem cell (iPSC)
- sgRNA, single guide RNA
- ssODN, single-stranded oligodeoxynucleotide
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Affiliation(s)
- Rui Wei
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
- Center for Translational Stem Cell Biology, Hong Kong, China
| | - Jiayin Yang
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Cell Inspire Therapeutics Co., Ltd and Cell Inspire Biotechnology Co., Ltd, Shenzhen 518102, China
| | - Chi-Wa Cheng
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
| | - Wai-In Ho
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
| | - Na Li
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
| | - Yang Hu
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
| | - Xueyu Hong
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Jian Fu
- Cell Inspire Therapeutics Co., Ltd and Cell Inspire Biotechnology Co., Ltd, Shenzhen 518102, China
| | - Bo Yang
- Cell Inspire Therapeutics Co., Ltd and Cell Inspire Biotechnology Co., Ltd, Shenzhen 518102, China
| | - Yuqing Liu
- Cell Inspire Therapeutics Co., Ltd and Cell Inspire Biotechnology Co., Ltd, Shenzhen 518102, China
| | - Lixiang Jiang
- Cell Inspire Therapeutics Co., Ltd and Cell Inspire Biotechnology Co., Ltd, Shenzhen 518102, China
| | - Wing-Hon Lai
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
| | - Ka-Wing Au
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
| | - Wai-Ling Tsang
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Yiu-Lam Tse
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
| | - Kwong-Man Ng
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
- Center for Translational Stem Cell Biology, Hong Kong, China
| | - Miguel A. Esteban
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
- Laboratory of Integrative Biology, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou 510005, China
- Joint School of Life Sciences, Guangzhou Medical University and Guangzhou Institutes of Biomedicine and Health, Guangzhou 511436, China
- Corresponding authors. Address: Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China; Tel.: (852) 2255-4694, fax: (852) 2818-6304.
| | - Hung-Fat Tse
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, Hong Kong, China
- Center for Translational Stem Cell Biology, Hong Kong, China
- Heart and Vascular Center, The University of Hong Kong-Shenzhen Hospital, Shenzhen 518053, China
- Corresponding authors. Address: Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China; Tel.: (852) 2255-4694, fax: (852) 2818-6304.
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Chan YH, Schooling CM, Zhao J, Au Yeung SL, Hai JJ, Thomas GN, Cheng KK, Jiang CQ, Wong YK, Au KW, Tang CS, Cheung CYY, Xu A, Sham PC, Lam TH, Lam KSL, Tse HF. Mendelian Randomization Focused Analysis of Vitamin D on the Secondary Prevention of Ischemic Stroke. Stroke 2021; 52:3926-3937. [PMID: 34565175 DOI: 10.1161/strokeaha.120.032634] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND PURPOSE Experimental studies showed vitamin D (Vit-D) could promote vascular regeneration and repair. Prior randomized studies had focused mainly on primary prevention. Whether Vit-D protects against ischemic stroke and myocardial infarction recurrence among subjects with prior ischemic insults was unknown. Here, we dissected through Mendelian randomization any effect of Vit-D on the secondary prevention of recurrent ischemic stroke and myocardial infarction. METHODS Based on a genetic risk score for Vit-D constructed from a derivation cohort sample (n=5331, 45% Vit-D deficient, 89% genotyped) via high-throughput exome-chip screening of 12 prior genome-wide association study-identified genetic variants of Vit-D mechanistic pathways (rs2060793, rs4588, and rs7041; F statistic, 73; P<0.001), we performed a focused analysis on prospective recurrence of myocardial infarction (MI) and ischemic stroke in an independent subsample with established ischemic disease (n=441, all with prior first ischemic event; follow-up duration, 41.6±14.3 years) under a 2-sample, individual-data, prospective Mendelian randomization approach. RESULTS In the ischemic disease subsample, 11.1% (n=49/441) had developed recurrent ischemic stroke or MI and 13.3% (n=58/441) had developed recurrent or de novo ischemic stroke/MI. Kaplan-Meier analyses showed that genetic risk score predicted improved event-free survival from recurrent ischemic stroke or MI (log-rank, 13.0; P=0.001). Cox regression revealed that genetic risk score independently predicted reduced risk of recurrent ischemic stroke or MI combined (hazards ratio, 0.62 [95% CI, 0.48-0.81]; P<0.001), after adjusted for potential confounders. Mendelian randomization supported that Vit-D is causally protective against the primary end points of recurrent ischemic stroke or MI (Wald estimate: odds ratio, 0.55 [95% CI, 0.35-0.81]) and any recurrent or de novo ischemic stroke/MI (odds ratio, 0.64 [95% CI, 0.42-0.91]) and recurrent MI alone (odds ratio, 0.52 [95% CI, 0.30-0.81]). CONCLUSIONS Genetically predicted lowering in Vit-D level is causal for the recurrence of ischemic vascular events in persons with prior ischemic stroke or MI.
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Affiliation(s)
- Yap-Hang Chan
- Division of Cardiology, Queen Mary Hospital (Y.-H.C., J.J.H., Y.-K.W., K.-W.A., H.-F.T.), The University of Hong Kong, Hong Kong SAR, China
| | - C Mary Schooling
- School of Public Health (C.M.S., J.Z., S.-L.A.Y., T.-H.L.), The University of Hong Kong, Hong Kong SAR, China
| | - Jie Zhao
- School of Public Health (C.M.S., J.Z., S.-L.A.Y., T.-H.L.), The University of Hong Kong, Hong Kong SAR, China
| | - Shiu-Lun Au Yeung
- School of Public Health (C.M.S., J.Z., S.-L.A.Y., T.-H.L.), The University of Hong Kong, Hong Kong SAR, China
| | - Jo Jo Hai
- Division of Cardiology, Queen Mary Hospital (Y.-H.C., J.J.H., Y.-K.W., K.-W.A., H.-F.T.), The University of Hong Kong, Hong Kong SAR, China.,Department of Medicine, Shenzhen Hong Kong University Hospital, China (J.J.H., H.-F.T.)
| | - G Neil Thomas
- Department of Public Health and Epidemiology, University of Birmingham, United Kingdom (G.N.T., K.-K.C.)
| | - Kar-Keung Cheng
- Department of Public Health and Epidemiology, University of Birmingham, United Kingdom (G.N.T., K.-K.C.)
| | | | - Yuen-Kwun Wong
- Division of Cardiology, Queen Mary Hospital (Y.-H.C., J.J.H., Y.-K.W., K.-W.A., H.-F.T.), The University of Hong Kong, Hong Kong SAR, China
| | - Ka-Wing Au
- Division of Cardiology, Queen Mary Hospital (Y.-H.C., J.J.H., Y.-K.W., K.-W.A., H.-F.T.), The University of Hong Kong, Hong Kong SAR, China
| | - Clara S Tang
- Department of Psychiatry and Centre for Genomic Sciences (C.S.T., P.-C.S.), The University of Hong Kong, Hong Kong SAR, China
| | - Chloe Y Y Cheung
- Division of Endocrinology, Queen Mary Hospital (C.Y.Y.C., A.X., K.S.-L.L.), The University of Hong Kong, Hong Kong SAR, China
| | - Aimin Xu
- Division of Endocrinology, Queen Mary Hospital (C.Y.Y.C., A.X., K.S.-L.L.), The University of Hong Kong, Hong Kong SAR, China
| | - Pak-Chung Sham
- Department of Psychiatry and Centre for Genomic Sciences (C.S.T., P.-C.S.), The University of Hong Kong, Hong Kong SAR, China
| | - Tai-Hing Lam
- School of Public Health (C.M.S., J.Z., S.-L.A.Y., T.-H.L.), The University of Hong Kong, Hong Kong SAR, China
| | - Karen Siu-Ling Lam
- Division of Endocrinology, Queen Mary Hospital (C.Y.Y.C., A.X., K.S.-L.L.), The University of Hong Kong, Hong Kong SAR, China
| | - Hung-Fat Tse
- Division of Cardiology, Queen Mary Hospital (Y.-H.C., J.J.H., Y.-K.W., K.-W.A., H.-F.T.), The University of Hong Kong, Hong Kong SAR, China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (H.-F.T.), The University of Hong Kong, Hong Kong SAR, China.,Shenzhen Institutes of Research and Innovation (H.-F.T.), The University of Hong Kong, Hong Kong SAR, China.,Department of Medicine, Shenzhen Hong Kong University Hospital, China (J.J.H., H.-F.T.)
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Wong YK, Cheung CYY, Tang CS, Hai JSH, Lee CH, Lau KK, Au KW, Cheung BMY, Sham PC, Xu A, Lam KSL, Tse HF. High-sensitivity troponin I and B-type natriuretic peptide biomarkers for prediction of cardiovascular events in patients with coronary artery disease with and without diabetes mellitus. Cardiovasc Diabetol 2019; 18:171. [PMID: 31847896 PMCID: PMC6918569 DOI: 10.1186/s12933-019-0974-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 12/03/2019] [Indexed: 12/16/2022] Open
Abstract
Background High-sensitivity troponin I (hs-Tnl) and B-type natriuretic peptide (BNP) are promising prognostic markers for coronary artery disease (CAD). This prospective cohort study investigated whether a combination of these cardiac biomarkers with conventional risk factors would add incremental value for the prediction of secondary major adverse cardiovascular events (MACEs) in patients with CAD, with and without type 2 diabetes mellitus (T2DM). Methods Baseline plasma level of hs-Tnl and BNP was measured in 2275 Chinese patients with stable CAD. Patients were monitored for new-onset of MACE over a median of 51 months. Cox proportional hazard model and area under the receiver operating characteristic curve (AUC) were used to assess the association of cardiac biomarkers with MACE and their predictive values in relationship with or without T2DM. Results During the follow up period 402 (18%) patients experienced a new-onset MACE with hs-Tnl and BNP level significantly higher than in those without MACE. In multivariable analyses, patients with elevated hs-Tnl (hazard ratio, 1.75 [95% CI 1.41–2.17]; P < 0.001) and BNP (hazard ratio, 1.42 [95% CI 1.15–1.75]; P = 0.001) were significantly associated with an increased risk of MACE after adjustment for variables of a risk factor model of age, sex, T2DM and hypertension. The risk factor model had an AUC of 0.64 for MACE prediction. The AUC significantly increased to 0.68 by the addition of hs-Tnl to the risk factor model. Subgroup analyses showed that hs-Tnl and BNP remained significant predictors of MACE in both patients with and without T2DM in multivariable models with higher risk of MACE evident in those without T2DM. Among patients without T2DM, addition of each biomarker yielded greater predictive accuracy than in T2DM patients, with AUC further increased to 0.75 when a combination of hs-Tnl and BNP was added to the risk factor model (age, sex and hypertension). Conclusions Elevated hs-Tnl and BNP level are independent predictors of new-onset MACE in CAD patients, irrespective of diabetes status. Among CAD patients without T2DM, a combination of cardiac biomarkers hs-Tnl and BNP yield the greatest predictive value beyond conventional risk factors.
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Affiliation(s)
- Yuen-Kwun Wong
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
| | - Chloe Y Y Cheung
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
| | - Clara S Tang
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - JoJo S H Hai
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
| | - Chi-Ho Lee
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
| | - Kui-Kai Lau
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
| | - Ka-Wing Au
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
| | - Bernard M Y Cheung
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
| | - Pak-Chung Sham
- Department of Psychiatry, The University of Hong Kong, Hong Kong, China.,Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,State Key Laboratory in Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, China
| | - Aimin Xu
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China.,Department of Pharmacology & Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Karen S L Lam
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China. .,State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China. .,Department of Medicine, Shenzhen Hong Kong University Hospital, Shenzhen, China.
| | - Hung-Fat Tse
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China. .,Department of Medicine, Shenzhen Hong Kong University Hospital, Shenzhen, China. .,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, The University of Hong Kong, Hong Kong, China. .,Shenzhen Institutes of Research and Innovation, The University of Hong Kong, Hong Kong, China.
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Wong YK, Cheung CYY, Tang CS, Au KW, Hai JSH, Lee CH, Lau KK, Cheung BMY, Sham PC, Xu A, Lam KSL, Tse HF. Age-Biomarkers-Clinical Risk Factors for Prediction of Cardiovascular Events in Patients With Coronary Artery Disease. Arterioscler Thromb Vasc Biol 2019; 38:2519-2527. [PMID: 30354221 DOI: 10.1161/atvbaha.118.311726] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Objective- In patients with stable coronary artery disease, conventional risk factors provide limited incremental predictive value for cardiovascular events. We sought to investigate whether a panel of cardiometabolic biomarkers alone or combined with conventional risk factors would exhibit incremental value in the prediction of cardiovascular events. Approach and Results- In the discovery cohort, we measured serum adiponectin, A-FABP (adipocyte fatty acid-binding protein), lipocalin-2, FGF (fibroblast growth factor)-19 and 21, plasminogen activator inhibitor-1, and retinol-binding protein-4 in 1166 Chinese coronary artery disease patients. After a median follow-up of 35 months, 170 patients developed new-onset major adverse cardiovascular events (MACE). In the model with age ≥65 years and conventional risk factors, area under the curve for predicting MACE was 0.68. Addition of lipocalin-2 to the age-clinical risk factor model improved predictive accuracy (area under the curve=0.73). Area under the curve further increased to 0.75 when a combination of lipocalin-2, A-FABP, and FGF-19 was added to yield age-biomarkers-clinical risk factor model. The adjusted hazard ratio on MACEs for lipocalin-2, A-FABP, and FGF-19 levels above optimal cutoffs were 2.23 (95% CI, 1.62-3.08), 1.99 (95% CI, 1.43-2.76), and 1.65 (95% CI, 1.15-2.35), respectively. In the validation cohort of 1262 coronary artery disease patients with type 2 diabetes mellitus, the age-biomarkers-clinical risk factor model was confirmed to provide good discrimination and calibration over the conventional risk factor alone for prediction of MACE. Conclusions- A combination of the 3 biomarkers, lipocalin-2, A-FABP, and FGF-19, with clinical risk factors to yield the age-biomarkers-clinical risk factor model provides an optimal and validated prediction of new-onset MACE in patients with stable coronary artery disease.
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Affiliation(s)
- Yuen-Kwun Wong
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China
| | - Chloe Y Y Cheung
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China
| | - Clara S Tang
- Department of Surgery (C.S.T.), the University of Hong Kong, China
| | - Ka-Wing Au
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China
| | - JoJo S H Hai
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China
| | - Chi-Ho Lee
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China
| | - Kui-Kai Lau
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China
| | - Bernard M Y Cheung
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China
| | - Pak-Chung Sham
- Department of Psychiatry (P.-C.S.), the University of Hong Kong, China.,Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.-C.S.), the University of Hong Kong, China.,State Key Laboratory in Brain and Cognitive Sciences (P.-C.S.), the University of Hong Kong, China
| | - Aimin Xu
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology (A.X., K.S.L.L.), the University of Hong Kong, China.,Department of Pharmacology & Pharmacy (A.X.), the University of Hong Kong, China
| | - Karen S L Lam
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology (A.X., K.S.L.L.), the University of Hong Kong, China
| | - Hung-Fat Tse
- From the Department of Medicine (Y.-K.W., C.Y.Y.C., K.-W.A., J.S.H.H., C.-H.L., K.-K.L., B.M.Y.C., A.X., K.S.L.L., H.-F.T.), the University of Hong Kong, China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (H.-F.T.), the University of Hong Kong, China.,Shenzhen Institutes of Research and Innovation (H.-F.T.), the University of Hong Kong, China.,Department of Medicine, Shenzhen Hong Kong University Hospital, China (H.-F.T.)
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Zhen Z, Liao SY, Zhu ZY, Sijia S, Au KW, Lai WH, Tsang A, Hai JS, Tse HF. Catheter-Based Splanchnic Denervation for Treatment of Hypertensive Cardiomyopathy. Hypertension 2019; 74:47-55. [DOI: 10.1161/hypertensionaha.118.12601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Zhe Zhen
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
| | - Song-Yan Liao
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
- Shenzhen Institutes of Research and Innovation, University of Hong Kong (H.-F.T., S.-Y.L.)
| | - Zi-Yi Zhu
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
| | - Sun Sijia
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
| | - Ka-Wing Au
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
| | - Wing-Hon Lai
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
| | - Anita Tsang
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
| | - JoJo S.H. Hai
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
| | - Hung-Fat Tse
- From the Cardiology Division, Department of Medicine, University of Hong Kong (Z.Z., S.-Y.L., Z.-Y.Z., S.S., K.-W.A., W.-H.L., A.T., J.S.H.H., H.-F.T.)
- Shenzhen Institutes of Research and Innovation, University of Hong Kong (H.-F.T., S.-Y.L.)
- Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, The University of Hong Kong, China (H.-F.T.)
- Department of Medicine, Shenzhen Hong Kong University Hospital, The University of Hong Kong, China (H.-F.T.)
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8
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Cheung CYY, Lee CH, Tang CS, Xu A, Au KW, Fong CHY, Ng KKK, Kwok KHM, Chow WS, Woo YC, Yuen MMA, Hai J, Tan KCB, Lam TH, Tse HF, Sham PC, Lam KSL. Genetic Regulation of Pigment Epithelium-Derived Factor (PEDF): An Exome-Chip Association Analysis in Chinese Subjects With Type 2 Diabetes. Diabetes 2019; 68:198-206. [PMID: 30305369 DOI: 10.2337/db18-0500] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 09/29/2018] [Indexed: 11/13/2022]
Abstract
Elevated circulating levels of pigment epithelium-derived factor (PEDF) have been reported in patients with type 2 diabetes (T2D) and its associated microvascular complications. This study aimed to 1) identify the genetic determinants influencing circulating PEDF levels in a clinical setting of T2D, 2) examine the relationship between circulating PEDF and diabetes complications, and 3) explore the causal relationship between PEDF and diabetes complications. An exome-chip association study on circulating PEDF levels was conducted in 5,385 Chinese subjects with T2D. A meta-analysis of the association results of the discovery stage (n = 2,936) and replication stage (n = 2,449) was performed. The strongest association was detected at SERPINF1 (p.Met72Thr; Pcombined = 2.06 × 10-57; β [SE] -0.33 [0.02]). Two missense variants of SMYD4 (p.Arg131Ile; Pcombined = 7.56 × 10-25; β [SE] 0.21 [0.02]) and SERPINF2 (p.Arg33Trp; Pcombined = 8.22 × 10-10; β [SE] -0.15 [0.02]) showed novel associations at genome-wide significance. Elevated circulating PEDF levels were associated with increased risks of diabetic nephropathy and sight-threatening diabetic retinopathy. Mendelian randomization analysis showed suggestive evidence of a protective role of PEDF on sight-threatening diabetic retinopathy (P = 0.085). Our study provided new insights into the genetic regulation of PEDF and further support for its potential application as a biomarker for diabetic nephropathy and sight-threatening diabetic retinopathy. Further studies to explore the causal relationship of PEDF with diabetes complications are warranted.
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Affiliation(s)
- Chloe Y Y Cheung
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
| | - Chi-Ho Lee
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Clara S Tang
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Aimin Xu
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
- Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Department of Pharmacology & Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Ka-Wing Au
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Carol H Y Fong
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kelvin K K Ng
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kelvin H M Kwok
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Wing-Sun Chow
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Yu-Cho Woo
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Michele M A Yuen
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - JoJo Hai
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kathryn C B Tan
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Tai-Hing Lam
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Hung-Fat Tse
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Pak-Chung Sham
- Department of Psychiatry, The University of Hong Kong, Hong Kong, China
- Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, China
| | - Karen S L Lam
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
- Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
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Abstract
The 2017/18 winter influenza season in Hong Kong started in early January 2018, predominated by influenza B/Yamagata. We collaborated with private medical practitioners of our sentinel surveillance system to collect respiratory specimens and clinical information from patients with influenza-like illness for estimation of the influenza vaccine effectiveness (VE) using the test-negative case-control design. We found that the overall VE was 59.1% (95%CI 41.1 to 71.8%) against all influenza and 53.5% (95%CI 35.4 to 74.6%) against influenza B. Seasonal influenza vaccine provided moderate to good protection against laboratory-confirmed influenza infection at primary care level in Hong Kong in the 2017/18 winter influenza season.
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Affiliation(s)
- Yung-Wai Desmond Chan
- a Communicable Disease Division, Surveillance and Epidemiology Branch , Centre for Health Protection, Department of Health , Kowloon , Hong Kong SAR Government
| | - Miu-Ling Wong
- a Communicable Disease Division, Surveillance and Epidemiology Branch , Centre for Health Protection, Department of Health , Kowloon , Hong Kong SAR Government
| | - Ka-Wing Au
- a Communicable Disease Division, Surveillance and Epidemiology Branch , Centre for Health Protection, Department of Health , Kowloon , Hong Kong SAR Government
| | - Shuk-Kwan Chuang
- a Communicable Disease Division, Surveillance and Epidemiology Branch , Centre for Health Protection, Department of Health , Kowloon , Hong Kong SAR Government
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10
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Yang J, Wong LY, Tian XY, Wei R, Lai WH, Au KW, Luo Z, Ward C, Ho WI, Ibañez DP, Liu H, Bao X, Qin B, Huang Y, Esteban MA, Tse HF. A Familial Hypercholesterolemia Human Liver Chimeric Mouse Model Using Induced Pluripotent Stem Cell-derived Hepatocytes. J Vis Exp 2018. [PMID: 30272645 DOI: 10.3791/57556] [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] [Indexed: 01/17/2023] Open
Abstract
Familial hypercholesterolemia (FH) is mostly caused by low-density lipoprotein receptor (LDLR) mutations and results in an increased risk of early-onset cardiovascular disease due to marked elevation of LDL cholesterol (LDL-C) in blood. Statins are the first line of lipid-lowering drugs for treating FH and other types of hypercholesterolemia, but new approaches are emerging, in particular PCSK9 antibodies, which are now being tested in clinical trials. To explore novel therapeutic approaches for FH, either new drugs or new formulations, we need appropriate in vivo models. However, differences in the lipid metabolic profiles compared to humans are a key problem of the available animal models of FH. To address this issue, we have generated a human liver chimeric mouse model using FH induced pluripotent stem cell (iPSC)-derived hepatocytes (iHeps). We used Ldlr-/-/Rag2-/-/Il2rg-/- (LRG) mice to avoid immune rejection of transplanted human cells and to assess the effect of LDLR-deficient iHeps in an LDLR null background. Transplanted FH iHeps could repopulate 5-10% of the LRG mouse liver based on human albumin staining. Moreover, the engrafted iHeps responded to lipid-lowering drugs and recapitulated clinical observations of increased efficacy of PCSK9 antibodies compared to statins. Our human liver chimeric model could thus be useful for preclinical testing of new therapies to FH. Using the same protocol, similar human liver chimeric mice for other FH genetic variants, or mutations corresponding to other inherited liver diseases, may also be generated.
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Affiliation(s)
- Jiayin Yang
- Department of Medicine, University of Hong Kong-Shenzhen Hospital; The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong; Research Centre of Heart, Brain, Hormone, and Healthy Ageing, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Lai-Yung Wong
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Xiao-Yu Tian
- School of Biomedical Sciences, Institute of Vascular Medicine, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong
| | - Rui Wei
- Department of Medicine, University of Hong Kong-Shenzhen Hospital; The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Wing-Hon Lai
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Ka-Wing Au
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Zhiwei Luo
- Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health and Guangzhou Medical University; Laboratory of RNA, Chromatin, and Human Disease, CAS Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences
| | - Carl Ward
- Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health and Guangzhou Medical University; Laboratory of RNA, Chromatin, and Human Disease, CAS Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences
| | - Wai-In Ho
- The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - David P Ibañez
- Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health and Guangzhou Medical University; Laboratory of RNA, Chromatin, and Human Disease, CAS Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences
| | - Hao Liu
- Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health and Guangzhou Medical University; Laboratory of RNA, Chromatin, and Human Disease, CAS Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences
| | - Xichen Bao
- Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health and Guangzhou Medical University; Laboratory of RNA, Chromatin, and Human Disease, CAS Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences
| | - Baoming Qin
- Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health and Guangzhou Medical University; Laboratory of RNA, Chromatin, and Human Disease, CAS Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences
| | - Yu Huang
- School of Biomedical Sciences, Institute of Vascular Medicine, Li Ka Shing Institute of Health Sciences, Chinese University of Hong Kong
| | - Miguel A Esteban
- Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health and Guangzhou Medical University; Laboratory of RNA, Chromatin, and Human Disease, CAS Key Laboratory of Regenerative Biology and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences; Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health;
| | - Hung-Fat Tse
- Department of Medicine, University of Hong Kong-Shenzhen Hospital; The Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong; Research Centre of Heart, Brain, Hormone, and Healthy Ageing, Li Ka Shing Faculty of Medicine, University of Hong Kong; Hong Kong-Guangdong Stem Cell and Regenerative Medicine Research Centre, University of Hong Kong and Guangzhou Institutes of Biomedicine and Health;
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Chiu HS, Chan KF, Chung CH, Ma K, Au KW. A Comparison of Emergency Department Admission Diagnoses and Discharge Diagnoses: Retrospective Study. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490790301000202] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective To study the accuracy of emergency department admission diagnosis and the effect of investigations on diagnostic accuracy. Design Retrospective study in a two-month period. Setting Accident & Emergency Department of a public general hospital, which had four in-patient specialties – Medicine, Surgery, Paediatrics and Orthopaedics. Subjects All cases admitted through the emergency department in the study period. Main outcome measures Degree of correlation between emergency department admission diagnosis and hospital discharge diagnosis. Results Of all admission diagnoses, 71.4% fully or partially matched the final discharge diagnoses. The accuracy of diagnosis was statistically better in traumatic cases, the male sex and young adults. Diagnostic accuracy varied with the specialty involved and investigations taken. Conclusion History and physical examination remained the most important diagnostic tools in the emergency department. In general, simple investigations available at the emergency department were not helpful in improving diagnostic accuracy.
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Affiliation(s)
- HS Chiu
- North District Hospital, Accident and Emergency Department, 9 Po Kin Road, Sheung Shui, N.T., Hong Kong
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12
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Cheung CYY, Tang CS, Xu A, Lee CH, Au KW, Xu L, Fong CHY, Kwok KHM, Chow WS, Woo YC, Yuen MMA, Cherny SS, Hai J, Cheung BMY, Tan KCB, Lam TH, Tse HF, Sham PC, Lam KSL. An Exome-Chip Association Analysis in Chinese Subjects Reveals a Functional Missense Variant of GCKR That Regulates FGF21 Levels. Diabetes 2017; 66:1723-1728. [PMID: 28385800 DOI: 10.2337/db16-1384] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/10/2017] [Indexed: 11/13/2022]
Abstract
Fibroblast growth factor 21 (FGF21) is increasingly recognized as an important metabolic regulator of glucose homeostasis. Here, we conducted an exome-chip association analysis by genotyping 5,169 Chinese individuals from a community-based cohort and two clinic-based cohorts. A custom Asian exome-chip was used to detect genetic determinants influencing circulating FGF21 levels. Single-variant association analysis interrogating 70,444 single nucleotide polymorphisms identified a novel locus, GCKR, significantly associated with circulating FGF21 levels at genome-wide significance. In the combined analysis, the common missense variant of GCKR, rs1260326 (p.Pro446Leu), showed an association with FGF21 levels after adjustment for age and sex (P = 1.61 × 10-12; β [SE] = 0.14 [0.02]), which remained significant on further adjustment for BMI (P = 3.01 × 10-14; β [SE] = 0.15 [0.02]). GCKR Leu446 may influence FGF21 expression via its ability to increase glucokinase (GCK) activity. This can lead to enhanced FGF21 expression via elevated fatty acid synthesis, consequent to the inhibition of carnitine/palmitoyl-transferase by malonyl-CoA, and via increased glucose-6-phosphate-mediated activation of the carbohydrate response element binding protein, known to regulate FGF21 gene expression. Our findings shed new light on the genetic regulation of FGF21 levels. Further investigations to dissect the relationship between GCKR and FGF21, with respect to the risk of metabolic diseases, are warranted.
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Affiliation(s)
- Chloe Y Y Cheung
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Clara S Tang
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Aimin Xu
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- The State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
- Research Centre of Heart, Brain, Hormone & Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Chi-Ho Lee
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Ka-Wing Au
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Lin Xu
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Carol H Y Fong
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kelvin H M Kwok
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Wing-Sun Chow
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Yu-Cho Woo
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Michele M A Yuen
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Stacey S Cherny
- Department of Psychiatry, The University of Hong Kong, Hong Kong, China
| | - JoJo Hai
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | | | - Kathryn C B Tan
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Tai-Hing Lam
- School of Public Health, The University of Hong Kong, Hong Kong, China
| | - Hung-Fat Tse
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Pak-Chung Sham
- Department of Psychiatry, The University of Hong Kong, Hong Kong, China
- Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
- The State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, China
| | - Karen S L Lam
- Department of Medicine, The University of Hong Kong, Hong Kong, China
- The State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
- Research Centre of Heart, Brain, Hormone & Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
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Cheung CYY, Tang CS, Xu A, Lee CH, Au KW, Xu L, Fong CHY, Kwok KHM, Chow WS, Woo YC, Yuen MMA, Hai JSH, Jin YL, Cheung BMY, Tan KCB, Cherny SS, Zhu F, Zhu T, Thomas GN, Cheng KK, Jiang CQ, Lam TH, Tse HF, Sham PC, Lam KSL. Exome-chip association analysis reveals an Asian-specific missense variant in PAX4 associated with type 2 diabetes in Chinese individuals. Diabetologia 2017; 60:107-115. [PMID: 27744525 DOI: 10.1007/s00125-016-4132-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 09/21/2016] [Indexed: 12/18/2022]
Abstract
AIMS/HYPOTHESIS Genome-wide association studies (GWASs) have identified many common type 2 diabetes-associated variants, mostly at the intronic or intergenic regions. Recent advancements of exome-array genotyping platforms have opened up a novel means for detecting the associations of low-frequency or rare coding variants with type 2 diabetes. We conducted an exomechip association analysis to identify additional type 2 diabetes susceptibility variants in the Chinese population. METHODS An exome-chip association study was conducted by genotyping 5640 Chinese individuals from Hong Kong, using a custom designed exome array, the Asian Exomechip. Single variant association analysis was conducted on 77,468 single nucleotide polymorphisms (SNPs). Fifteen SNPs were subsequently genotyped for replication analysis in an independent Chinese cohort comprising 12,362 individuals from Guangzhou. A combined analysis involving 7189 cases and 10,813 controls was performed. RESULTS In the discovery stage, an Asian-specific coding variant rs2233580 (p.Arg192His) in PAX4, and two variants at the known loci, CDKN2B-AS1 and KCNQ1, were significantly associated with type 2 diabetes with exome-wide significance (p discovery < 6.45 × 10-7). The risk allele (T) of PAX4 rs2233580 was associated with a younger age at diabetes diagnosis. This variant was replicated in an independent cohort and demonstrated a stronger association that reached genome-wide significance (p meta-analysis [p meta] = 3.74 × 10-15) in the combined analysis. CONCLUSIONS/INTERPRETATION We identified the association of a PAX4 Asian-specific missense variant rs2233580 with type 2 diabetes in an exome-chip association analysis, supporting the involvement of PAX4 in the pathogenesis of type 2 diabetes. Our findings suggest PAX4 is a possible effector gene of the 7q32 locus, previously identified from GWAS in Asians.
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Affiliation(s)
- Chloe Y Y Cheung
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Clara S Tang
- Department of Surgery, University of Hong Kong, Hong Kong, People's Republic of China
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology, University of Hong Kong, Hong Kong, People's Republic of China
- Research Centre of Heart, Brain, Hormone and Healthy Ageing, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, People's Republic of China
- Department of Pharmacology & Pharmacy, University of Hong Kong, Hong Kong, People's Republic of China
| | - Chi-Ho Lee
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Ka-Wing Au
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Lin Xu
- School of Public Health, Room 505, Faculty of Medicine Building, William M.W. Mong Block, University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong, People's Republic of China
| | - Carol H Y Fong
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Kelvin H M Kwok
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Wing-Sun Chow
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Yu-Cho Woo
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Michele M A Yuen
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - JoJo S H Hai
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Ya-Li Jin
- Molecular Epidemiological Research Centre, Guangzhou Number 12 Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Bernard M Y Cheung
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Kathryn C B Tan
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China
| | - Stacey S Cherny
- Department of Psychiatry, University of Hong Kong, Hong Kong, People's Republic of China
| | - Feng Zhu
- Molecular Epidemiological Research Centre, Guangzhou Number 12 Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Tong Zhu
- Molecular Epidemiological Research Centre, Guangzhou Number 12 Hospital, Guangzhou, Guangdong, People's Republic of China
| | - G Neil Thomas
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Kar-Keung Cheng
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Chao-Qiang Jiang
- Molecular Epidemiological Research Centre, Guangzhou Number 12 Hospital, Guangzhou, Guangdong, People's Republic of China
| | - Tai-Hing Lam
- School of Public Health, Room 505, Faculty of Medicine Building, William M.W. Mong Block, University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong, People's Republic of China.
- Molecular Epidemiological Research Centre, Guangzhou Number 12 Hospital, Guangzhou, Guangdong, People's Republic of China.
| | - Hung-Fat Tse
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China.
- Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, University of Hong Kong, Hong Kong, People's Republic of China.
| | - Pak-Chung Sham
- Department of Psychiatry, University of Hong Kong, Hong Kong, People's Republic of China.
- Centre for Genomic Sciences, Centre for Genomic Sciences, University of Hong Kong, 6/F, HKJC Building for Interdisciplinary Research, 5 Sassoon Road, Pokfulam, Hong Kong, People's Republic of China.
- State Key Laboratory in Brain and Cognitive Sciences, University of Hong Kong, Hong Kong, People's Republic of China.
| | - Karen S L Lam
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, People's Republic of China.
- State Key Laboratory of Pharmaceutical Biotechnology, University of Hong Kong, Hong Kong, People's Republic of China.
- Research Centre of Heart, Brain, Hormone and Healthy Ageing, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, People's Republic of China.
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Ng KM, Mok PY, Butler AW, Ho JCY, Choi SW, Lee YK, Lai WH, Au KW, Lau YM, Wong LY, Esteban MA, Siu CW, Sham PC, Colman A, Tse HF. Amelioration of X-Linked Related Autophagy Failure in Danon Disease With DNA Methylation Inhibitor. Circulation 2016; 134:1373-1389. [PMID: 27678261 DOI: 10.1161/circulationaha.115.019847] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [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: 12/08/2015] [Accepted: 08/23/2016] [Indexed: 01/25/2023]
Abstract
BACKGROUND Danon disease is an X-linked disorder that leads to fatal cardiomyopathy caused by a deficiency in lysosome-associated membrane protein-2 (LAMP2). In female patients, a later onset and less severe clinical phenotype have been attributed to the random inactivation of the X chromosome carrying the mutant diseased allele. We generated a patient-specific induced pluripotent stem cell (iPSCs)-based model of Danon disease to evaluate the therapeutic potential of Xi-chromosome reactivation using a DNA methylation inhibitor. METHODS Using whole-exome sequencing, we identified a nonsense mutation (c.520C>T, exon 4) of the LAMP2 gene in a family with Danon disease. We generated iPSC lines from somatic cells derived from the affected mother and her 2 sons, and we then differentiated them into cardiomyocytes (iPSC-CMs) for modeling the histological and functional signatures, including autophagy failure of Danon disease. RESULTS Our iPSC-CM platform provides evidence that random inactivation of the wild-type and mutant LAMP2 alleles on the X chromosome is responsible for the unusual phenotype in female patients with Danon disease. In vitro, iPSC-CMs from these patients reproduced the histological features and autophagy failure of Danon disease. Administration of the DNA demethylating agent 5-aza-2'-deoxycytidine reactivated the silent LAMP2 allele in iPSCs and iPSC-CMs in female patients with Danon disease and ameliorated their autophagy failure, supporting the application of a patient-specific iPSC platform for disease modeling and drug screening. CONCLUSIONS Our iPSC-CM platform provides novel mechanistic and therapeutic insights into the contribution of random X chromosome inactivation to disease phenotype in X-linked Danon disease.
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Affiliation(s)
- Kwong-Man Ng
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Pamela Y Mok
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Amy W Butler
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Jenny C Y Ho
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Shing-Wan Choi
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Yee-Ki Lee
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Wing-Hon Lai
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Ka-Wing Au
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Yee-Man Lau
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Lai-Yung Wong
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Miguel A Esteban
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Chung-Wah Siu
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Pak C Sham
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Alan Colman
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.)
| | - Hung-Fat Tse
- From Cardiology Division, Department of Medicine (K.-M.N., J.C.Y.H., Y.-K.L., W.-H.L., K.-W.A., Y.-M.L., L.-Y.W., C.-W.S., H.-F.T.) and Department of Psychiatry (A.W.B., S.-W.C., P.C.S., A.C.), Queen Mary Hospital, Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine (K.-M.N, C.W.-S., H.-F.T.), Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine (M.A.E., H.-F.T.), Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), State Key Laboratory for Cognitive and Brain Sciences, Li Ka Shing Faculty of Medicine (P.C.S.), and Shenzhen Institutes of Research and Innovation (H.-F.T.), University of Hong Kong, Hong Kong SAR, China; Stem Cell Disease Models, A*STAR Institute of Medical Biology, Singapore (P.Y.M.); MRC Social Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King's College London, London, UK (A.W.B.); and Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou, China (M.A.E.).
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Xu JY, Lee YK, Ran X, Liao SY, Yang J, Au KW, Lai WH, Esteban MA, Tse HF. Generation of Induced Cardiospheres via Reprogramming of Skin Fibroblasts for Myocardial Regeneration. Stem Cells 2016; 34:2693-2706. [PMID: 27333945 DOI: 10.1002/stem.2438] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 05/15/2016] [Accepted: 05/28/2016] [Indexed: 11/06/2022]
Abstract
Recent pre-clinical and clinical studies have suggested that endogenous cardiospheres (eCS) are potentially safe and effective for cardiac regeneration following myocardial infarction (MI). Nevertheless the preparation of autologous eCS requires invasive myocardial biopsy with limited yield. We describe a novel approach to generate induced cardiospheres (iCS) from adult skin fibroblasts via somatic reprogramming. After infection with Sox2, Klf4, and Oct4, iCS were generated from mouse adult skin fibroblasts treated with Gsk3β inhibitor-(2'Z,3'E)- 6-Bromoindirubin-3'-oxime and Oncostatin M. They resembled eCS, but contained a higher percentage of cells expressing Mesp1, Isl1, and Nkx2.5. They were differentiated into functional cardiomyocytes in vitro with similar electrophysiological properties, calcium transient and contractile function to eCS and mouse embryonic stem cell-derived cardiomyocytes. Transplantation of iCS (1 × 106 cells) into mouse myocardium following MI had similar effects to transplantation of eCS but significantly better than saline or fibroblast in improving left ventricular ejection fraction, increasing anterior/septal ventricular wall thickness and capillary density in the infarcted region 4 weeks after transplantation. No tumor formation was observed. iCS generated from adult skin fibroblasts by somatic reprogramming and a cocktail of Gsk3β inhibitor-6-Bromoindirubin-3'-oxime and Oncostatin M may represent a novel source for cell therapy in MI. Stem Cells 2016;34:2693-2706.
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Affiliation(s)
- Jian-Yong Xu
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China.,Shenzhen Institutes of Research and Innovation, the University of Hong Kong, Hong Kong, SAR, China
| | - Yee-Ki Lee
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China
| | - Xinru Ran
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China
| | - Song-Yan Liao
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China
| | - Jiayin Yang
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China.,Shenzhen Institutes of Research and Innovation, the University of Hong Kong, Hong Kong, SAR, China
| | - Ka-Wing Au
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China
| | - Wing-Hon Lai
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China
| | - Miguel A Esteban
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, China.,Laboratory of Chromatin and Human Disease, Key Laboratory of Regenerative Biology of the Chinese Academy of Sciences and Guangdong Provincial Key Laboratory of Stem Cells and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Hung-Fat Tse
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, SAR, China.,Shenzhen Institutes of Research and Innovation, the University of Hong Kong, Hong Kong, SAR, China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, The University of Hong Kong and Guangzhou Institutes of Biomedicine and Health, China.,Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, SAR, China
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16
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Tang CS, Zhang H, Cheung CYY, Xu M, Ho JCY, Zhou W, Cherny SS, Zhang Y, Holmen O, Au KW, Yu H, Xu L, Jia J, Porsch RM, Sun L, Xu W, Zheng H, Wong LY, Mu Y, Dou J, Fong CHY, Wang S, Hong X, Dong L, Liao Y, Wang J, Lam LSM, Su X, Yan H, Yang ML, Chen J, Siu CW, Xie G, Woo YC, Wu Y, Tan KCB, Hveem K, Cheung BMY, Zöllner S, Xu A, Eugene Chen Y, Jiang CQ, Zhang Y, Lam TH, Ganesh SK, Huo Y, Sham PC, Lam KSL, Willer CJ, Tse HF, Gao W. Exome-wide association analysis reveals novel coding sequence variants associated with lipid traits in Chinese. Nat Commun 2015; 6:10206. [PMID: 26690388 PMCID: PMC4703860 DOI: 10.1038/ncomms10206] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 11/13/2015] [Indexed: 12/19/2022] Open
Abstract
Blood lipids are important risk factors for coronary artery disease (CAD). Here we perform an exome-wide association study by genotyping 12,685 Chinese, using a custom Illumina HumanExome BeadChip, to identify additional loci influencing lipid levels. Single-variant association analysis on 65,671 single nucleotide polymorphisms reveals 19 loci associated with lipids at exome-wide significance (P<2.69 × 10−7), including three Asian-specific coding variants in known genes (CETP p.Asp459Gly, PCSK9 p.Arg93Cys and LDLR p.Arg257Trp). Furthermore, missense variants at two novel loci—PNPLA3 p.Ile148Met and PKD1L3 p.Thr429Ser—also influence levels of triglycerides and low-density lipoprotein cholesterol, respectively. Another novel gene, TEAD2, is found to be associated with high-density lipoprotein cholesterol through gene-based association analysis. Most of these newly identified coding variants show suggestive association (P<0.05) with CAD. These findings demonstrate that exome-wide genotyping on samples of non-European ancestry can identify additional population-specific possible causal variants, shedding light on novel lipid biology and CAD. An important risk factor for coronary artery disease is the level of blood lipids. Here the authors conduct an exome-wide association study in Chinese cohorts and identify three novel loci associated with lipid levels as well as three Asian-specific variants in known loci.
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Affiliation(s)
- Clara S Tang
- Department of Psychiatry, the University of Hong Kong, Hong Kong, China
| | - He Zhang
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Chloe Y Y Cheung
- Department of Medicine, the University of Hong Kong, Hong Kong, China
| | - Ming Xu
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing 100191, China
| | - Jenny C Y Ho
- Department of Medicine, the University of Hong Kong, Hong Kong, China
| | - Wei Zhou
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA.,Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Stacey S Cherny
- Department of Psychiatry, the University of Hong Kong, Hong Kong, China.,Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, China
| | - Yan Zhang
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - Oddgeir Holmen
- Department of Public Health and General Practice, HUNT Research Centre, Norwegian University of Science and Technology, 7600 Levanger, Norway.,St Olav Hospital, Trondheim University Hospital, 7030 Trondheim, Norway
| | - Ka-Wing Au
- Department of Medicine, the University of Hong Kong, Hong Kong, China
| | - Haiyi Yu
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing 100191, China
| | - Lin Xu
- School of Public Health, the University of Hong Kong, Hong Kong, China
| | - Jia Jia
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - Robert M Porsch
- Department of Psychiatry, the University of Hong Kong, Hong Kong, China
| | - Lijie Sun
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing 100191, China
| | - Weixian Xu
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing 100191, China
| | - Huiping Zheng
- Department of Cardiology, Institute of Vascular Medicine, Peking University Third Hospital, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing 100191, China
| | - Lai-Yung Wong
- Department of Medicine, the University of Hong Kong, Hong Kong, China
| | - Yiming Mu
- Department of Endocrinology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Jingtao Dou
- Department of Endocrinology, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Carol H Y Fong
- Department of Medicine, the University of Hong Kong, Hong Kong, China
| | - Shuyu Wang
- Beijing Hypertension League Institute, Beijing 100039, China
| | - Xueyu Hong
- Department of Medicine, the University of Hong Kong, Hong Kong, China
| | - Liguang Dong
- Peking University Shougang Hospital, Beijing, China
| | - Yanhua Liao
- Peking University Shougang Hospital, Beijing, China
| | | | - Levina S M Lam
- Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Xi Su
- Department of Cardiology, Wuhan Asia Heart Hospital, China
| | - Hua Yan
- Department of Cardiology, Wuhan Asia Heart Hospital, China
| | - Min-Lee Yang
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Jin Chen
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Chung-Wah Siu
- Department of Medicine, the University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Gaoqiang Xie
- Peking University Clinical Research Institute, Beijing, China
| | - Yu-Cho Woo
- Department of Medicine, the University of Hong Kong, Hong Kong, China
| | - Yangfeng Wu
- Peking University Clinical Research Institute, Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing, China
| | - Kathryn C B Tan
- Department of Medicine, the University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Kristian Hveem
- Department of Public Health and General Practice, HUNT Research Centre, Norwegian University of Science and Technology, 7600 Levanger, Norway
| | - Bernard M Y Cheung
- Department of Medicine, the University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
| | - Sebastian Zöllner
- Department of Biostatistics, Center for Statistical Genetics, University of Michigan School of Public Health, Ann Arbor, Michigan 48109, USA
| | - Aimin Xu
- Department of Medicine, the University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China.,Department of Pharmacology &Pharmacy, The University of Hong Kong, Hong Kong, China
| | - Y Eugene Chen
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA
| | | | - Youyi Zhang
- Institute of Vascular Medicine, Peking University Third Hospital, Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Tai-Hing Lam
- School of Public Health, the University of Hong Kong, Hong Kong, China
| | - Santhi K Ganesh
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Yong Huo
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - Pak C Sham
- Department of Psychiatry, the University of Hong Kong, Hong Kong, China.,Centre for Genomic Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong, China
| | - Karen S L Lam
- Department of Medicine, the University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong, China
| | - Cristen J Willer
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA.,Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - Hung-Fat Tse
- Department of Medicine, the University of Hong Kong, Hong Kong, China.,Research Centre of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China.,Hong Kong-Guangdong Joint Laboratory on Stem Cell and Regenerative Medicine, the University of Hong Kong, Hong Kong, China
| | - Wei Gao
- Department of Cardiology, Peking University Third Hospital, Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health, Beijing 100191, China
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17
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Liao SY, Liu Y, Zuo M, Zhang Y, Yue W, Au KW, Lai WH, Wu Y, Shuto C, Chen P, Siu CW, Schwartz PJ, Tse HF. Remodelling of cardiac sympathetic re-innervation with thoracic spinal cord stimulation improves left ventricular function in a porcine model of heart failure. Europace 2015; 17:1875-83. [PMID: 25767085 DOI: 10.1093/europace/euu409] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [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: 10/02/2014] [Accepted: 12/30/2014] [Indexed: 12/15/2022] Open
Abstract
AIMS Thoracic spinal cord stimulation (SCS) has been shown to improve left ventricular ejection fraction (LVEF) in heart failure (HF). Nevertheless, the optimal duration (intermittent vs. continuous) of stimulation and the mechanisms of action remain unclear. METHODS AND RESULTS We performed chronic thoracic SCS at the level of T1-T3 (50 Hz, pulse width 0.2 ms) in 30 adult pigs with HF induced by myocardial infarction and rapid ventricular pacing for 4 weeks. All the animals were treated with daily oral metoprolol succinate (25 mg) plus ramipril (2.5 mg), and randomized to a control group (n = 10), intermittent SCS (4 h ×3, n = 10) or continuous SCS (24 h, n = 10) for 10 weeks. Serial measurements of LVEF and +dP/dt and serum levels of norepinephrine and B-type natriuretic peptide (BNP) were measured. After sacrifice, immunohistological studies of myocardial sympathetic and parasympathetic nerve sprouting and innervation were performed. Echocardiogram revealed a significant increase in LVEF and +dP/dt at 10 weeks in both the intermittent and continuous SCS group compared with controls (P < 0.05). In both SCS groups, there was diffuse sympathetic nerve sprouting over the infarct, peri-infarct, and normal regions compared with only the peri-infarct and infarct regions in the control group. In addition, sympathetic innervation at the peri-infarct and infarct regions was increased following SCS, but decreased in the control group. Myocardium norepinephrine spillover and serum BNP at 10 weeks was significantly decreased only in the continuous SCS group (P < 0.05). CONCLUSIONS In a porcine model of HF, SCS induces significant remodelling of cardiac sympathetic innervation over the peri-infarct and infarct regions and is associated with improved LV function and reduced myocardial norepinephrine spillover.
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Affiliation(s)
- Song-Yan Liao
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Yuan Liu
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Mingliang Zuo
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Yuelin Zhang
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Wensheng Yue
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Ka-Wing Au
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Wing-Hon Lai
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Yangsong Wu
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China
| | - Chika Shuto
- Center for Innovation and Strategic Collaboration, St Jude Medical, Inc, St Paul, MN, USA
| | - Peter Chen
- Center for Innovation and Strategic Collaboration, St Jude Medical, Inc, St Paul, MN, USA
| | - Chung-Wah Siu
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Peter J Schwartz
- IRCCS Istituto Auxologico Italiano, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy
| | - Hung-Fat Tse
- Cardiology Division, Department of Medicine, Queen Mary Hospital, The University of Hong Kong, Hong Kong, China Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China Shenzhen Institutes of Research and Innovation, University of Hong Kong, Hong Kong, China
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18
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Siu CW, Lee YK, Ho JCY, Lai WH, Chan YC, Ng KM, Wong LY, Au KW, Lau YM, Zhang J, Lay KW, Colman A, Tse HF. Modeling of lamin A/C mutation premature cardiac aging using patient‐specific induced pluripotent stem cells. Aging (Albany NY) 2013; 4:803-822. [PMID: 23362510 PMCID: PMC3560431 DOI: 10.18632/aging.100503] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
AIMS We identified an autosomal dominant non-sense mutation (R225X) in exon 4 of the lamin A/C (LMNA) gene in a Chinese family spanning 3 generations with familial dilated cardiomyopathy (DCM). In present study, we aim to generate induced pluripotent stem cells derived cardiomyocytes (iPSC-CMs) from an affected patient with R225X and another patient bearing LMNA frame-shift mutation for drug screening. METHODS and RESULTS Higher prevalence of nuclear bleb formation and micronucleation was present in LMNAR225X/WT and LMNAFramshift/WT iPSC-CMs. Under field electrical stimulation, percentage of LMNA-mutated iPSC-CMs exhibiting nuclear senescence and cellular apoptosis markedly increased. shRNA knockdown of LMNA replicated those phenotypes of the mutated LMNA field electrical stress. Pharmacological blockade of ERK1/2 pathway with MEK1/2 inhibitors, U0126 and selumetinib (AZD6244) significantly attenuated the pro-apoptotic effects of field electric stimulation on the mutated LMNA iPSC-CMs. CONCLUSION LMNA-related DCM was modeled in-vitro using patient-specific iPSC-CMs. Our results demonstrated that haploinsufficiency due to R225X LMNA non-sense mutation was associated with accelerated nuclear senescence and apoptosis of iPSC- CMs under electrical stimulation, which can be significantly attenuated by therapeutic blockade of stress-related ERK1/2 pathway.
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Affiliation(s)
- Chung-Wah Siu
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong SAR, China
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19
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Lai WH, Ho JCY, Chan YC, Ng JHL, Au KW, Wong LY, Siu CW, Tse HF. Attenuation of hind-limb ischemia in mice with endothelial-like cells derived from different sources of human stem cells. PLoS One 2013; 8:e57876. [PMID: 23472116 PMCID: PMC3589485 DOI: 10.1371/journal.pone.0057876] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 01/29/2013] [Indexed: 01/23/2023] Open
Abstract
Functional endothelial-like cells (EC) have been successfully derived from different cell sources and potentially used for treatment of cardiovascular diseases; however, their relative therapeutic efficacy remains unclear. We differentiated functional EC from human bone marrow mononuclear cells (BM-EC), human embryonic stem cells (hESC-EC) and human induced pluripotent stem cells (hiPSC-EC), and compared their in-vitro tube formation, migration and cytokine expression profiles, and in-vivo capacity to attenuate hind-limb ischemia in mice. Successful differentiation of BM-EC was only achieved in 1/6 patient with severe coronary artery disease. Nevertheless, BM-EC, hESC-EC and hiPSC-EC exhibited typical cobblestone morphology, had the ability of uptaking DiI-labeled acetylated low-density-lipoprotein, and binding of Ulex europaeus lectin. In-vitro functional assay demonstrated that hiPSC-EC and hESC-EC had similar capacity for tube formation and migration as human umbilical cord endothelial cells (HUVEC) and BM-EC (P>0.05). While increased expression of major angiogenic factors including epidermal growth factor, hepatocyte growth factor, vascular endothelial growth factor, placental growth factor and stromal derived factor-1 were observed in all EC cultures during hypoxia compared with normoxia (P<0.05), the magnitudes of cytokine up-regulation upon hypoxic were more dramatic in hiPSC-EC and hESC-EC (P<0.05). Compared with medium, transplanting BM-EC (n = 6), HUVEC (n = 6), hESC-EC (n = 8) or hiPSC-EC (n = 8) significantly attenuated severe hind-limb ischemia in mice via enhancement of neovascularization. In conclusion, functional EC can be generated from hECS and hiPSC with similar therapeutic efficacy for attenuation of severe hind-limb ischemia. Differentiation of functional BM-EC was more difficult to achieve in patients with cardiovascular diseases, and hESC-EC or iPSC-EC are readily available as "off-the-shelf" format for the treatment of tissue ischemia.
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Affiliation(s)
- Wing-Hon Lai
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
| | - Jenny C. Y. Ho
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
- Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, HKSAR, China
| | - Yau-Chi Chan
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
| | - Joyce H. L. Ng
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
| | - Ka-Wing Au
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
| | - Lai-Yung Wong
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
| | - Chung-Wah Siu
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
- Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, HKSAR, China
| | - Hung-Fat Tse
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong, Hong Kong, HKSAR, China
- Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong, HKSAR, China
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20
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Tse HF, Ho JCY, Choi SW, Lee YK, Butler AW, Ng KM, Siu CW, Simpson MA, Lai WH, Chan YC, Au KW, Zhang J, Lay KWJ, Esteban MA, Nicholls JM, Colman A, Sham PC. Patient-specific induced-pluripotent stem cells-derived cardiomyocytes recapitulate the pathogenic phenotypes of dilated cardiomyopathy due to a novel DES mutation identified by whole exome sequencing. Hum Mol Genet 2013; 22:1395-403. [PMID: 23300193 DOI: 10.1093/hmg/dds556] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In this paper, we report a novel heterozygous mutation of A285V codon conversion on exon 4 of the desmin (DES), using whole exome sequencing (WES) in an isolated proband with documented dilated cardiomyopathy (DCM). This mutation is predicted to cause three-dimensional structure changes of DES. Immunohistological and electron microscopy studies demonstrated diffuse abnormal DES aggregations in DCM-induced-pluripotent stem cell (iPSC)-derived cardiomyocytes, and control-iPSC-derived cardiomyocytes transduced with A285V-DES. DCM-iPSC-derived cardiomyocytes also exhibited functional abnormalities in vitro. This is the first demonstration that patient-specific iPSC-derived cardiomyocytes can be used to provide histological and functional confirmation of a suspected genetic basis for DCM identified by WES.
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Affiliation(s)
- Hung-Fat Tse
- Cardiology Division, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China.
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21
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Ho JCY, Lai WH, Li MF, Au KW, Yip MC, Wong NLY, Ng ESK, Lam FFY, Siu CW, Tse HF. Reversal of endothelial progenitor cell dysfunction in patients with type 2 diabetes using a conditioned medium of human embryonic stem cell-derived endothelial cells. Diabetes Metab Res Rev 2012; 28:462-73. [PMID: 22492468 DOI: 10.1002/dmrr.2304] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND The potential clinical application of bone marrow or peripheral blood-derived progenitor cells for cardiovascular regeneration in patients with diabetes mellitus (DM) is limited by their functional impairment. We sought to determine the mechanisms of impaired therapeutic efficacy of peripheral blood-derived progenitor cells in type 2 DM patients and evaluated the use of cell-free conditioned medium obtained from human embryonic stem cell-derived endothelial-like cells (ESC-ECs) to reverse their functional impairment. METHODS The angiogenic potential of late outgrowth endothelial cells (OECs) and cytokine profile of the conditional medium of proangiogenic cells (PACs) derived from peripheral blood-mononuclear cells of healthy control and DM patients and ESC-ECs was compared by in vitro tube formation assay and a multiplex bead-based immunoassay kit, respectively. The in vivo angiogenic potential of ESC-ECs derived conditioned medium in rescuing the functional impairment of PB-PACs in DM patients was investigated using a hindlimb ischemia model. RESULTS Human ESC-ECs had similar functional and phenotypic characteristics as OECs in healthy controls. Cytokine profiling showed that vascular endothelial growth factor, stromal cell-derived factor 1 and placental growth factor were down-regulated in PACs from DM patients. Tube formation assay that revealed functional impairment of OECs from DM patients could be rescued by ESC-ECs conditioned medium. Administration of ESC-ECs conditioned medium restored the therapeutic efficacy of PB-PACs from DM patients in a mouse model of hindlimb ischemia. CONCLUSIONS Our results showed that peripheral blood-derived progenitor cells from DM patients have impaired function because of defective secretion of angiogenic cytokines, which could be restored by supplementation of ESC-ECs conditioned medium.
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Affiliation(s)
- Jenny C Y Ho
- Cardiology Division, Department of Medicine, The University of Hong Kong, Hong Kong, HKSAR, China
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22
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Lau SLY, Yuen ML, Kou CYC, Au KW, Zhou J, Tsui SKW. Interferons induce the expression of IFITM1 and IFITM3 and suppress the proliferation of rat neonatal cardiomyocytes. J Cell Biochem 2012; 113:841-7. [PMID: 22021094 PMCID: PMC7166870 DOI: 10.1002/jcb.23412] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Cardiovascular diseases have been one of the leading killers among the human population worldwide. During the heart development, cardiomyocytes undergo a transition from hyperplastic to hypertrophic growth with an unclear underlying mechanism. In this study, we aim to investigate how interferons differentially stimulate the interferon-inducible transmembrane (IFITM) family proteins and further be involved in the process of heart development. The expression levels of three IFITM family members, IFITM1, IFITM2, and IFITM3 were investigated during Sprague-Dawley rat myocardial development and differentiation of H9C2 cardiomyocytes. The effects of interferon-α, -β, and -γ on DNA synthesis in H9C2 cells were also characterized. Up-regulation of IFITM1 and IFITM3 were observed during the heart development of Sprague-Dawley rat and the differentiation of H9C2 cells. Moreover, interferon-α and -β induce the expression of IFITM3 while interferon-γ up-regulates IFITM1. Finally, interferon-α and -β were demonstrated to inhibit DNA synthesis during H9C2 cell differentiation. Our results indicated interferons are potentially involved in the differentiation and cell proliferation during heart development.
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Affiliation(s)
- Samantha Lai-Yee Lau
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
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Ng KM, Chan YC, Lee YK, Lai WH, Au KW, Fung ML, Siu CW, Li RA, Tse HF. Cobalt chloride pretreatment promotes cardiac differentiation of human embryonic stem cells under atmospheric oxygen level. Cell Reprogram 2011; 13:527-37. [PMID: 22029419 DOI: 10.1089/cell.2011.0038] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Our previous study demonstrated the direct involvement of the HIF-1α subunit in the promotion of cardiac differentiation of murine embryonic stem cells (ESCs). We report the use of cobalt chloride to induce HIF-1α stabilization in human ESCs to promote cardiac differentiation. Treatment of undifferentiated hES2 human ESCs with 50 μM cobalt chloride markedly increased protein levels of the HIF-1α subunit, and was associated with increased expression of early cardiac specific transcription factors and cardiotrophic factors including NK2.5, vascular endothelial growth factor, and cardiotrophin-1. When pretreated cells were subjected to cardiac differentiation, a notable increase in the occurrence of beating embryoid bodies and sarcomeric actinin-positive cells was observed, along with increased expression of the cardiac-specific markers, MHC-A, MHC-B, and MLC2V. Electrophysiological study revealed increased atrial- and nodal-like cells in the cobalt chloride-pretreated group. Confocal calcium imaging analysis indicated that the maximum upstroke and decay velocities were significantly increased in both noncaffeine and caffeine-induced calcium transient in cardiomyocytes derived from the cobalt chloride-pretreated cells, suggesting these cells were functionally more mature. In conclusion, our study demonstrated that cobalt chloride pretreatment of hES2 human ESCs promotes cardiac differentiation and the maturation of calcium homeostasis of cardiomyocytes derived from ESCs.
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Affiliation(s)
- Kwong-Man Ng
- Research Centre of Heart, Brain, Hormone and Healthy Ageing, Li Ka Shing Faculty of Medicine, Department of Physiology, University of Hong Kong, and Department of Medicine, Queen Mary Hospital, Hong Kong, Republic of China
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Ho JCY, Zhou T, Lai WH, Huang Y, Chan YC, Li X, Wong NLY, Li Y, Au KW, Guo D, Xu J, Siu CW, Pei D, Tse HF, Esteban MA. Generation of induced pluripotent stem cell lines from 3 distinct laminopathies bearing heterogeneous mutations in lamin A/C. Aging (Albany NY) 2011; 3:380-90. [PMID: 21483033 PMCID: PMC3117453 DOI: 10.18632/aging.100277] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The term laminopathies defines a group of genetic disorders caused by defects in the nuclear envelope, mostly the lamins. Lamins are the main constituents of the nuclear lamina, a filamentous meshwork associated with the inner nuclear membrane that provides mechanical stability and plays important roles in processes such as transcription, DNA replication and chromatin organization. More than 300 mutations in lamin A/C have been associated with diverse clinical phenotypes, understanding the molecular basis of these diseases may provide a rationale for treating them. Here we describe the generation of induced pluripotent stem cells (iPSCs) from a patient with inherited dilated cardiomiopathy and 2 patients with distinct accelerated forms of aging, atypical Werner syndrome and Hutchinson Gilford progeria, all of which are caused by mutations in lamin A/C. These cell lines were pluripotent and displayed normal nuclear membrane morphology compared to donor fibroblasts. Their differentiated progeny reproduced the disease phenotype, reinforcing the idea that they represent excellent tools for understanding the role of lamin A/C in normal physiology and the clinical diversity associated with these diseases.
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Affiliation(s)
- Jenny C Y Ho
- Cardiology Division, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Pokfulam, China
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Lai WH, Ho JCY, Lee YK, Ng KM, Au KW, Chan YC, Lau CP, Tse HF, Siu CW. ROCK inhibition facilitates the generation of human-induced pluripotent stem cells in a defined, feeder-, and serum-free system. Cell Reprogram 2010; 12:641-53. [PMID: 20858051 DOI: 10.1089/cell.2010.0051] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Human-induced pluripotent stem cells (iPSCs) generated from human adult somatic cells through reprogramming hold great promises for future regenerative medicine. However, exposure of human iPSCs to animal feeder and serum in the process of their generation and maintenance imposes risk of transmitting animal pathogens to human subjects, thus hindering the potential therapeutic applications. Here, we report the successful generation of human iPSCs in a feeder-independent culture system with defined factors. Two stable human iPSC lines were established from primary human dermal fibroblasts of two healthy volunteers. These human iPSCs expressed a panel of pluripotency markers including stage-specific embryonic antigen (SSEA)-4, tumor-rejection antigen (TRA)-1-60, TRA-1-81, and alkaline phosphatase, while maintaining normal karyotypes and the exogenous reprogramming factors being silenced. In addition, these human iPSCs can differentiate along lineages representative of the three embryonic germ layers upon formation of embryoid bodies, indicating their pluripotency. Furthermore, subcutaneous transplantation of these cells into immunodeficient mice resulted in teratoma formation in 6 to 8 weeks. Our findings are an important step toward generating patient-specific iPSCs in a more clinically compliant manner by eliminating the need of animal feeder cells and animal serum.
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Affiliation(s)
- Wing-Hon Lai
- Cardiology Division, Department of Medicine, Queen Mary Hospital, the University of Hong Kong and Research Center of Heart, Brain, Hormone and Healthy Aging, Li Ka Shing Faculty of Medicine, the University of Hong Kong, Hong Kong
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26
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Liao SY, Liu Y, Siu CW, Zhang Y, Lai WH, Au KW, Lee YK, Chan YC, Yip PMC, Wu EX, Wu Y, Lau CP, Li RA, Tse HF. Proarrhythmic risk of embryonic stem cell-derived cardiomyocyte transplantation in infarcted myocardium. Heart Rhythm 2010; 7:1852-9. [PMID: 20833268 DOI: 10.1016/j.hrthm.2010.09.006] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2010] [Accepted: 09/04/2010] [Indexed: 10/19/2022]
Abstract
BACKGROUND Cellular replacement strategies using embryonic stem cells (ESCs) and their cardiac derivatives are emerging as novel experimental therapeutic paradigms for the treatment of post-myocardial infarction (MI) left ventricular (LV) dysfunction; however, their potential proarrhythmic risk remains unclear. OBJECTIVE The purpose of this study was to investigate the functional effect and proarrhythmic risk of ESC transplantation in a mouse model of MI. METHODS We compared the functional effects and proarrhythmic risk of direct intramyocardial transplantation of 3 × 10(5) undifferentiated mouse ESCs (MI+ESC group, n = 33) and mouse ESC-derived cardiomyocytes (MI+ESC-CM group, n = 40) versus culture medium (MI group, n = 33) at the infarct border zone in a mouse model of acute MI. LV performance was assessed with serial cardiac magnetic resonance imaging (MRI) at 1 and 3 week(s) post-MI, and invasive LV pressure measurement was assessed (dP/dt) at 4 weeks before sacrifice for histological examination. Furthermore, electrophysiological study was also performed in another set of animals in each group (n = 24) to assess for proarrhythmias after transplantation. RESULTS In vitro cellular electrophysiological study demonstrated that ESC-CMs exhibit arrhythmogenesis including automaticity, lengthened action potential duration, and depolarized resting membrane potential. At 4 weeks, the MI+ESC-CM group (21/40, 53%) had a higher mortality rate compared with those in the MI group (10/33, 30%, P = .08) and in the MI+ESC group (7/33, 21%, P = .012). Electrophysiological study showed a significantly higher incidence of inducible ventricular tachyarrhythmias in the MI+ESC-CM group (13/24, 54%) compared with in the MI group (6/24, 21%, P = .039) and in the MI+ESC group (5/24, 21%, P = .017). Cardiac MRI showed similar improvement in LV ejection fraction in the MI+ESC and MI+ESC-CM groups compared with in the MI group at 1 week (27.5% ± 3.8%; 30.3% ± 5.2% vs. 12.4% ± 1.4%; P < .05) and 3 weeks (29.8% ± 3.9%; 27.0% ± 4.8% vs. 10.6% ± 2.8%; P < .05) post-MI, respectively. Furthermore, invasive hemodynamic assessment at 4 weeks showed significant similar improvement in LV +dP/dt in the MI+ESC (2,644 ± 391 mmHg/s, P < .05) and MI+ESC-CM groups (2,539 ± 389 mmHg/s; P < .05) compared with in the MI group (2,042 ± 406 mmHg/s). CONCLUSIONS Our results demonstrate that transplantation of undifferentiated ESCs and ESC-CMs provides similar improvement in cardiac function post-MI. However, transplantation of ESC-CMs is associated with a significantly higher prevalence of inducible ventricular tachyarrhythmias and early mortality than transplantations with ESCs.
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Affiliation(s)
- Song-Yan Liao
- Cardiology Division, Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong, Hong Kong Special Administrative Region, China
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Kou CYC, Lau SLY, Au KW, Leung PY, Chim SSC, Fung KP, Waye MMY, Tsui SKW. Epigenetic regulation of neonatal cardiomyocytes differentiation. Biochem Biophys Res Commun 2010; 400:278-83. [PMID: 20735989 DOI: 10.1016/j.bbrc.2010.08.064] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Accepted: 08/17/2010] [Indexed: 11/30/2022]
Abstract
The relationship between DNA methylation, histone modifications and terminal differentiation in cardiomyocytes was investigated in this study. The upregulation of methylation-related proteins, including DNA methyltransferase (DNMT) 1, methyl-CpG binding domain proteins 1, 2 and 3, and the increase in global methylation during rat neonatal heart development were observed. Moreover, an increase in DNA synthesis and a delay in differentiation were found in 5-azacytidine (5-azaC)-treated cardiomyocytes. Increase in acetylation of H3-K9, H4-K5, H4-K8 and methylation of H3-K4 suggested a more accessible chromatin structure in 5-azaC-treated cells. Furthermore, methyl-CpG-binding protein 2 was found to be upregulated in differentiated cardiomyocytes. Overexpression of this protein resulted in an increase of global methylation levels. Therefore, we suggest that a hypermethylated genome and a more compact chromatin structure are formed during terminal differentiation of cardiomyocytes.
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Affiliation(s)
- Cecy Ying-Chuck Kou
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
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28
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Lee YK, Ng KM, Chan YC, Lai WH, Au KW, Ho CYJ, Wong LY, Lau CP, Tse HF, Siu CW. Triiodothyronine promotes cardiac differentiation and maturation of embryonic stem cells via the classical genomic pathway. Mol Endocrinol 2010; 24:1728-36. [PMID: 20667986 DOI: 10.1210/me.2010-0032] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Embryonic stem cells (ESCs) can differentiate into functional cardiomyocytes and thus represent a promising cell source for cardiac regenerative therapy. Nevertheless, the therapeutic application of ESC-derived cardiomyocytes is limited by the low efficacy of the current protocol for cardiac differentiation and their immature phenotypes. Although thyroid hormone is essential for normal cardiac development and function, its role in the cardiac differentiation of ESCs, as well as the maturation of ESC-derived cardiomyocytes, remains unclear. In this study, we examined the cardiac differentiation of murine ESCs in the presence of T(3) for 7 d using flow cytometry, RT-PCR, cellular electrophysiology study, and confocal calcium imaging. Compared with control conditions, T(3) supplementation increased the number of ESC-derived cardiomyocytes and was accompanied by up-regulation of a panel of cardiac markers, including Nkx2.5, myosin light chain-2V, as well as alpha- and beta-myosin heavy chain. More importantly, electrophysiological study revealed that ESC-derived cardiomyocytes exhibited more adult-like phenotypes after T(3) supplementation based on action potential characteristics. They also exhibited more adult-like calcium homeostasis properties. These phenotypic changes were associated with up-regulation of sarco(endo)plasmic reticulum calcium ATPase-2a and ryanodine receptor-2 expression. In addition, the classical (genomic) pathway was shown to be involved in T(3)-induced cardiac differentiation of ESCs. Our results show that T(3) supplementation promotes cardiac differentiation of ESCs and enhances maturation of electrophysiological, as well as calcium homeostasis, properties of ESC-derived cardiomyocytes.
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Affiliation(s)
- Yee-Ki Lee
- Cardiology Division, Department of Medicine, The University of Hong Kong, Queen Mary Hospital, Hong Kong, China
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Mak GC, Au KW, Tai LS, Chuang KC, Cheng KC, Shiu TC, Lim W. Association of D222G substitution in haemagglutinin of 2009 pandemic influenza A (H1N1) with severe disease. Euro Surveill 2010; 15:19534; author reply pii/19535. [PMID: 20394715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
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30
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Mak GC, Au KW, Tai LS, Chuang KC, Cheng KC, Shiu TC, Lim W. Association of D222G substitution in haemagglutinin of 2009 pandemic influenza A (H1N1) with severe disease. Euro Surveill 2010. [DOI: 10.2807/ese.15.14.19534-en] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- G C Mak
- Centre for Health Protection, Department of Health, Hong Kong SAR
| | - K W Au
- Centre for Health Protection, Department of Health, Hong Kong SAR
| | - L S Tai
- Centre for Health Protection, Department of Health, Hong Kong SAR
| | - K C Chuang
- Centre for Health Protection, Department of Health, Hong Kong SAR
| | - K C Cheng
- Centre for Health Protection, Department of Health, Hong Kong SAR
| | - T C Shiu
- Centre for Health Protection, Department of Health, Hong Kong SAR
| | - W Lim
- Centre for Health Protection, Department of Health, Hong Kong SAR
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Lian Q, Zhang Y, Zhang J, Zhang HK, Wu X, Zhang Y, Lam FFY, Kang S, Xia JC, Lai WH, Au KW, Chow YY, Siu CW, Lee CN, Tse HF. Functional mesenchymal stem cells derived from human induced pluripotent stem cells attenuate limb ischemia in mice. Circulation 2010; 121:1113-23. [PMID: 20176987 DOI: 10.1161/circulationaha.109.898312] [Citation(s) in RCA: 423] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Aging and aging-related disorders impair the survival and differentiation potential of bone marrow mesenchymal stem cells (MSCs) and limit their therapeutic efficacy. Induced pluripotent stem cells (iPSCs) may provide an alternative source of functional MSCs for tissue repair. This study aimed to generate and characterize human iPSC-derived MSCs and to investigate their biological function for the treatment of limb ischemia. METHODS AND RESULTS Human iPSCs were induced to MSC differentiation with a clinically compliant protocol. Three monoclonal, karyotypically stable, and functional MSC-like cultures were successfully isolated using a combination of CD24(-) and CD105(+) sorting. They did not express pluripotent-associated markers but displayed MSC surface antigens and differentiated into adipocytes, osteocytes, and chondrocytes. Transplanting iPSC-MSCs into mice significantly attenuated severe hind-limb ischemia and promoted vascular and muscle regeneration. The benefits of iPSC-MSCs on limb ischemia were superior to those of adult bone marrow MSCs. The greater potential of iPSC-MSCs may be attributable to their superior survival and engraftment after transplantation to induce vascular and muscle regeneration via direct de novo differentiation and paracrine mechanisms. CONCLUSIONS Functional MSCs can be clonally generated, beginning at a single-cell level, from human iPSCs. Patient-specific iPSC-MSCs can be prepared as an "off-the-shelf" format for the treatment of tissue ischemia.
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Affiliation(s)
- Qizhou Lian
- Cardiology Division, Department of Medicine, University of Hong Kong, Hong Kong, China.
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Chan YC, Wang K, Au KW, Au KW, Lau CP, Tse HF, Li RA. Probing the bradycardic drug binding receptor of HCN-encoded pacemaker channels. Pflugers Arch 2010; 459:25-38. [PMID: 19756722 PMCID: PMC2765624 DOI: 10.1007/s00424-009-0719-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 07/23/2009] [Accepted: 08/21/2009] [Indexed: 11/26/2022]
Abstract
If (or Ih), encoded by the hyperpolarization-activated, cyclic nucleotide-gated (HCN1–4) channel gene family, contributes significantly to cardiac pacing. Bradycardic agents such as ZD7288 that target HCN channels have been developed, but the molecular configuration of their receptor is poorly defined. Here, we probed the drug receptor by systematically introducing alanine scanning substitutions into the selectivity filter (C347A, I348A, G349A, Y350A, G351A in the P-loop), outer (P355A, V356A, S357A, M358A in the P-S6 linker), and inner (M377A, F378A, V379A in S6) pore vestibules of HCN1 channels. When heterologously expressed in human embryonic kidney 293 cells for patch-clamp recordings, I348A, G349A, Y350A, G351A, P355A, and V356A did not produce measurable currents. The half-blocking concentration (IC50) of wild type (WT) for ZD7288 was 25.8 ± 9.7 μM. While the IC50 of M358A was identical to WT, those of C347A, S357A, F378A, and V379A markedly increased to 137.6 ± 56.4, 113.3 ± 34.1, 587.1 ± 167.5, and 1726.3 ± 673.4 μM, respectively (p < 0.05). Despite the proximity of the S6 residues studied, M377A was hypersensitive (IC50 = 5.1 ± 0.7 μM; p < 0.05) implicating site specificity. To explore the energetic interactions among the S6 residues, double and triple substitutions (M377A/F378A, M377A/V379A, F378A/V379A, and M377A/F378A/V379A) were generated for thermodynamic cycle analysis. Specific interactions with coupling energies (ΔΔG) >1 kT for M377–F378 and F378–V379 but not M377–V379 were identified. Based on these new data and others, we proposed a refined drug-blocking model that may lead to improved antiarrhythmics and bioartificial pacemaker designs.
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Affiliation(s)
- Yau-Chi Chan
- Division of Cardiology, Department of Medicine, Queen Mary Hospital, Li Ka Shing Faculty of Medicine, University of Hong Kong, Pokfulam, Hong Kong
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Au KW, Liao SY, Lee YK, Lai WH, Ng KM, Chan YC, Yip MC, Ho CY, Wu EX, Li RA, Siu CW, Tse HF. Effects of iron oxide nanoparticles on cardiac differentiation of embryonic stem cells. Biochem Biophys Res Commun 2009; 379:898-903. [PMID: 19135029 DOI: 10.1016/j.bbrc.2008.12.160] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Accepted: 12/24/2008] [Indexed: 10/21/2022]
Abstract
The therapeutic potential of transplantation of embryonic stem cells (ESCs) in animal model of myocardial infarction has been consistently demonstrated. The development of superparamagnetic iron oxide (SPIO) nanoparticles labeling and cardiac magnetic resonance imaging (MRI) have been increasingly used to track the migration of transplanted cells in vivo allowing cell fate determination. However, the impact of SPIO- labeling on cell phenotype and cardiac differentiation capacity of ESCs remains unclear. In this study, we demonstrated that ESCs labeled with SPIO compared to their unlabeled counterparts had similar cardiogenic capacity, and SPIO-labeling did not affect calcium-handling property of ESC-derived cardiomyocytes. Moreover, transplantation of SPIO-labeled ESCs via direct intra-myocardial injection to infarct myocardium resulted in significant improvement in heart function. These findings demonstrated the feasibility of in vivo ESC tracking using SPIO-labeling and cardiac MRI without affecting the cardiac differentiation potential and functional properties of ESCs.
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Affiliation(s)
- Ka-Wing Au
- Cardiology Division, Department of Medicine, The University of Hong Kong, Rm 1928, Block K, Queen Mary Hospital, Hong Kong
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Au KW, Siu CW, Lau CP, Tse HF, Li RA. Structural and functional determinants in the S5-P region of HCN-encoded pacemaker channels revealed by cysteine-scanning substitutions. Am J Physiol Cell Physiol 2007; 294:C136-44. [PMID: 17989208 DOI: 10.1152/ajpcell.00340.2007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hyperpolarization-activated cyclic nucleotide-modulated (HCN) channels are responsible for the membrane pacemaker current that underlies the spontaneous generation of bioelectrical rhythms. However, their structure-function relationship is poorly understood. Previously, we identified several pore residues that influence HCN gating properties and proposed a pore-to-gate mechanism. Here, we systematically introduced cysteine-scanning substitutions into the descending portion of the P loop (residues 339-345) of HCN1-R (where R is resistance to sulfhydryl-reactive agents) channels, in which all endogenous cysteines except C303 have been removed or replaced. F339C, K340C, A341C, M342C, S343C, and M345C did not produce functional currents. Interestingly, the loss of function phenotype of F339C could be rescued by the reducing agent dithiothreitol (DTT). H344C but not HCN1-R and DTT-treated F339C channels were sensitive to blockade by divalent Cd(2+) (current with 100 microM Cd(2+)/control current at -140 mV = 67.6 +/- 2.9%, 109.3 +/- 3.1%, and 103.8 +/- 1.7%, respectively). Externally applied methanethiosulfate ethylammonium, a covalent sulfhydryl-reactive compound, irreversibly modified H344C by reducing the current at -140 mV (to 43.7 +/- 6.5%), causing a hyperpolarizing steady-state activation shift (change in half-activation voltage: approximately 6 mV) and decelerated gating kinetics (by up to 3-fold). Based on these results, we conclude that pore residues 339-345 are important determinants of the structure-function properties of HCN channels and that the side chain of H344 is externally accessible.
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Affiliation(s)
- Ka-Wing Au
- Department of Medicine, Queen Mary Hospital, University of Hong Kong, Hong Kong
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Au KW, Kou CYC, Woo AYH, Chim SSC, Fung KP, Cheng CHK, Waye MMY, Tsui SKW. Calcyclin binding protein promotes DNA synthesis and differentiation in rat neonatal cardiomyocytes. J Cell Biochem 2006; 98:555-66. [PMID: 16440310 DOI: 10.1002/jcb.20710] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
During cardiac muscle development, most cardiomyocytes permanently withdraw from the cell cycle. Previously, by suppressive subtractive hybridization, we identified calcyclin-binding protein/Siah-interacting protein (CacyBP/SIP) as one of the candidates being upregulated in the hyperplastic to hypertrophic switch, suggesting an important role of CacyBP/SIP in cardiac development. To show the importance of CacyBP/SIP during myoblast differentiation, we report here that CacyBP/SIP is developmentally regulated in postnatal rat hearts. The overexpression of CacyBP/SIP promotes the differentiation and DNA synthesis of H9C2 cells and primary rat cardiomyocytes, as well as downregulates the expression of beta-catenin. Besides, CacyBP/SIP promotes the formation of myotubes and multinucleation upon differentiation. To investigate the cardioprotective role of CacyBP/SIP in cardiomyocytes, a hypoxia/reoxygenation model was employed. We found that CacyBP/SIP was upregulated during myocardial infarction (MI) and hypoxia/reoxygenation. As a conclusion, CacyBP/SIP may play a role in cardiomyogenic differentiation and possibly protection of cardiomyocytes during hypoxia/reoxygenation injury.
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MESH Headings
- Animals
- Animals, Newborn
- Calcium-Binding Proteins/genetics
- Calcium-Binding Proteins/metabolism
- Cardiotonic Agents
- Cell Cycle
- Cell Differentiation
- Cell Hypoxia
- Cells, Cultured
- Creatine Kinase/metabolism
- Culture Media
- DNA/biosynthesis
- DNA Replication
- Down-Regulation/genetics
- Gene Expression
- Gene Expression Regulation, Developmental
- Intracellular Signaling Peptides and Proteins
- Muscle Fibers, Skeletal/metabolism
- Myocytes, Cardiac/cytology
- Myocytes, Cardiac/enzymology
- Myocytes, Cardiac/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rats
- Rats, Sprague-Dawley
- Up-Regulation/genetics
- beta Catenin/genetics
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Affiliation(s)
- Ka-Wing Au
- Department of Biochemistry and Croucher Laboratory for Human Genomics, The Chinese University of Hong Kong, Shatin, NT, China
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