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Xiao F, Zhang X, Morton SU, Kim SW, Fan Y, Gorham JM, Zhang H, Berkson PJ, Mazumdar N, Cao Y, Chen J, Hagen J, Liu X, Zhou P, Richter F, Shen Y, Ward T, Gelb BD, Seidman JG, Seidman CE, Pu WT. Functional dissection of human cardiac enhancers and noncoding de novo variants in congenital heart disease. Nat Genet 2024; 56:420-430. [PMID: 38378865 DOI: 10.1038/s41588-024-01669-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 01/23/2024] [Indexed: 02/22/2024]
Abstract
Rare coding mutations cause ∼45% of congenital heart disease (CHD). Noncoding mutations that perturb cis-regulatory elements (CREs) likely contribute to the remaining cases, but their identification has been problematic. Using a lentiviral massively parallel reporter assay (lentiMPRA) in human induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs), we functionally evaluated 6,590 noncoding de novo variants (ncDNVs) prioritized from the whole-genome sequencing of 750 CHD trios. A total of 403 ncDNVs substantially affected cardiac CRE activity. A majority increased enhancer activity, often at regions with undetectable reference sequence activity. Of ten DNVs tested by introduction into their native genomic context, four altered the expression of neighboring genes and iPSC-CM transcriptional state. To prioritize future DNVs for functional testing, we used the MPRA data to develop a regression model, EpiCard. Analysis of an independent CHD cohort by EpiCard found enrichment of DNVs. Together, we developed a scalable system to measure the effect of ncDNVs on CRE activity and deployed it to systematically assess the contribution of ncDNVs to CHD.
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Affiliation(s)
- Feng Xiao
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Xiaoran Zhang
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Sarah U Morton
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA
- Division of Newborn Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Seong Won Kim
- Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Youfei Fan
- Department of Pediatrics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Joshua M Gorham
- Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Huan Zhang
- Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Paul J Berkson
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Neil Mazumdar
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Yangpo Cao
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
- Department of Pharmacology, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Jian Chen
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Jacob Hagen
- Mindich Child Health and Development Institute and Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - Xujie Liu
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Pingzhu Zhou
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Felix Richter
- Mindich Child Health and Development Institute and Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - Yufeng Shen
- Departments of Systems Biology and Biomedical Informatics, Columbia University Medical Center, New York City, NY, USA
| | - Tarsha Ward
- Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - Bruce D Gelb
- Mindich Child Health and Development Institute and Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | | | - Christine E Seidman
- Department of Genetics, Harvard Medical School, Boston, MA, USA.
- Division of Cardiology, Brigham and Women's Hospital, Boston, MA, USA.
- Howard Hughes Medical Institute, Chevy Chase, MD, USA.
| | - William T Pu
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA.
- Harvard Stem Cell Institute, Cambridge, MA, USA.
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2
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Guo C, Jardin BD, Lin J, Ambroise RL, Wang Z, Yang L, Mazumdar N, Lu F, Ma Q, Cao Y, Liu C, Liu X, Lan F, Zhao M, Xiao H, Dong E, Pu WT, Guo Y. In vivo proximity proteomics uncovers palmdelphin (PALMD) as a Z-line-associated mitigator of isoproterenol-induced cardiac injury. bioRxiv 2023:2023.12.06.570334. [PMID: 38106146 PMCID: PMC10723331 DOI: 10.1101/2023.12.06.570334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Z-lines are core ultrastructural organizers of cardiomyocytes that modulate many facets of cardiac pathogenesis. Yet a comprehensive proteomic atlas of Z-line-associated components remain incomplete. Here, we established an adeno-associated virus (AAV)-delivered, cardiomyocyte-specific, proximity-labeling approach to characterize the Z-line proteome in vivo. We found palmdelphin (PALMD) as a novel Z-line-associated protein in both adult murine cardiomyocytes and human pluripotent stem cell-derived cardiomyocytes. Germline and cardiomyocyte-specific palmd knockout mice were grossly normal at baseline but exhibited compromised cardiac hypertrophy and aggravated cardiac injury upon long-term isoproterenol treatment. By contrast, cardiomyocyte-specific PALMD overexpression was sufficient to mitigate isoproterenol-induced cardiac injury. PALMD ablation perturbed transverse tubules (T-tubules) and their association with sarcoplasmic reticulum, which formed the Z-line-associated junctional membrane complex (JMC) essential for calcium handling and cardiac function. These phenotypes were associated with disrupted localization of T-tubule markers caveolin-3 (CAV3) and junctophilin-2 (JPH2) and the reduction of nexilin (NEXN) protein, a crucial Z-line-associated protein that is essential for both Z-line and JMC structures and functions. PALMD was found to interact with NEXN and enhance its protein stability while the Nexn mRNA level was not affected. Together, this study discovered PALMD as a potential target for myocardial protection and highlighted in vivo proximity proteomics as a powerful approach to nominate novel players regulating cardiac pathogenesis. Highlights In vivo proximity proteomics uncover novel Z-line components that are undetected in in vitro proximity proteomics in cardiomyocytes.PALMD is a novel Z-line-associated protein that is dispensable for baseline cardiomyocyte function in vivo.PALMD mitigates cardiac dysfunction and myocardial injury after repeated isoproterenol insults.PALMD stabilizes NEXN, an essential Z-line-associated regulator of the junctional membrane complex and cardiac systolic function.
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3
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Guo Y, Cao Y, Jardin BD, Mazumdar N, Guo C, Yang L, Lin J, Chen Z, Ma Q, Zhao M, Dong E, Pu WT. A shared role of the myocardin-family transcriptional coactivators in cardiomyocyte maturation. Sci China Life Sci 2023; 66:2939-2942. [PMID: 37574527 PMCID: PMC10914308 DOI: 10.1007/s11427-023-2385-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/05/2023] [Indexed: 08/15/2023]
Affiliation(s)
- Yuxuan Guo
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing, 100191, China.
- Peking University Institute of Cardiovascular Sciences, Beijing, 100191, China.
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China.
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China.
| | - Yangpo Cao
- Boston Children's Hospital, Department of Cardiology, Boston, MA, 02115, USA
| | - Blake D Jardin
- Boston Children's Hospital, Department of Cardiology, Boston, MA, 02115, USA
| | - Neil Mazumdar
- Boston Children's Hospital, Department of Cardiology, Boston, MA, 02115, USA
| | - Congting Guo
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing, 100191, China
- Peking University Institute of Cardiovascular Sciences, Beijing, 100191, China
| | - Luzi Yang
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing, 100191, China
- Peking University Institute of Cardiovascular Sciences, Beijing, 100191, China
| | - Junsen Lin
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing, 100191, China
- Peking University Institute of Cardiovascular Sciences, Beijing, 100191, China
| | - Zhan Chen
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing, 100191, China
- Peking University Institute of Cardiovascular Sciences, Beijing, 100191, China
| | - Qing Ma
- Boston Children's Hospital, Department of Cardiology, Boston, MA, 02115, USA
| | - Mingming Zhao
- Peking University Third Hospital, Department of Cardiology and Institute of Vascular Medicine, Beijing, 100191, China
- Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China
| | - Erdan Dong
- Peking University Institute of Cardiovascular Sciences, Beijing, 100191, China
- State Key Laboratory of Vascular Homeostasis and Remodeling, Peking University, Beijing, 100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing, 100191, China
- Peking University Third Hospital, Department of Cardiology and Institute of Vascular Medicine, Beijing, 100191, China
- Research Unit of Medical Science Research Management/Basic and Clinical Research of Metabolic Cardiovascular Diseases, Chinese Academy of Medical Sciences, Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China
- National Health Commission Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing, 100191, China
| | - William T Pu
- Boston Children's Hospital, Department of Cardiology, Boston, MA, 02115, USA.
- Harvard Stem Cell Institute, Cambridge, MA, 02138, USA.
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4
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Wang S, Yazawa E, Keating EM, Mazumdar N, Hauschild A, Ma Q, Wu H, Xu Y, Shi X, Strathdee D, Gerszten RE, Schlame M, Pu WT. Genetic modifiers modulate phenotypic expression of tafazzin deficiency in a mouse model of Barth syndrome. Hum Mol Genet 2023; 32:2055-2067. [PMID: 36917259 PMCID: PMC10244222 DOI: 10.1093/hmg/ddad041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/27/2023] [Accepted: 03/09/2023] [Indexed: 03/16/2023] Open
Abstract
Barth syndrome is an X-linked disorder caused by loss-of-function mutations in Tafazzin (TAZ), an acyltransferase that catalyzes remodeling of cardiolipin, a signature phospholipid of the inner mitochondrial membrane. Patients develop cardiac and skeletal muscle weakness, growth delay and neutropenia, although phenotypic expression varies considerably between patients. Taz knockout mice recapitulate many of the hallmark features of the disease. We used mouse genetics to test the hypothesis that genetic modifiers alter the phenotypic manifestations of Taz inactivation. We crossed TazKO/X females in the C57BL6/J inbred strain to males from eight inbred strains and evaluated the phenotypes of first-generation (F1) TazKO/Y progeny, compared to TazWT/Y littermates. We observed that genetic background strongly impacted phenotypic expression. C57BL6/J and CAST/EiJ[F1] TazKO/Y mice developed severe cardiomyopathy, whereas A/J[F1] TazKO/Y mice had normal heart function. C57BL6/J and WSB/EiJ[F1] TazKO/Y mice had severely reduced treadmill endurance, whereas endurance was normal in A/J[F1] and CAST/EiJ[F1] TazKO/Y mice. In all genetic backgrounds, cardiolipin showed similar abnormalities in knockout mice, and transcriptomic and metabolomic investigations identified signatures of mitochondrial uncoupling and activation of the integrated stress response. TazKO/Y cardiac mitochondria were small, clustered and had reduced cristae density in knockouts in severely affected genetic backgrounds but were relatively preserved in the permissive A/J[F1] strain. Gene expression and mitophagy measurements were consistent with reduced mitophagy in knockout mice in genetic backgrounds intolerant of Taz mutation. Our data demonstrate that genetic modifiers powerfully modulate phenotypic expression of Taz loss-of-function and act downstream of cardiolipin, possibly by altering mitochondrial quality control.
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Affiliation(s)
- Suya Wang
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02215NYU 10016, USA
| | - Erika Yazawa
- Division of Newborn Medicine, Boston Children’s Hospital, Boston, MA 02215NYU 10016, USA
| | - Erin M Keating
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02215NYU 10016, USA
| | - Neil Mazumdar
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02215NYU 10016, USA
| | - Alexander Hauschild
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02215NYU 10016, USA
| | - Qing Ma
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02215NYU 10016, USA
| | - Haiyan Wu
- Department of Pharmacology, Sichuan University West China School of Basic Sciences and Forensic Medicine, Chengdu, Sichuan, China
| | - Yang Xu
- Department of Anesthesiology, New York University School of Medicine, New York, NY, USA
| | - Xu Shi
- Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Douglas Strathdee
- Transgenic Technology Laboratory, Cancer Research UK Beatson Institute, Glasgow, UK
| | - Robert E Gerszten
- Division of Cardiovascular Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Michael Schlame
- Department of Anesthesiology, New York University School of Medicine, New York, NY, USA
| | - William T Pu
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02215NYU 10016, USA
- Transgenic Technology Laboratory, Cancer Research UK Beatson Institute, Glasgow, UK
- Harvard Stem Cell Institute, Harvard University, 02138 Beatson, Cambridge, MA G61 1BD, USA
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5
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Zhou P, VanDusen NJ, Zhang Y, Cao Y, Sethi I, Hu R, Zhang S, Wang G, Ye L, Mazumdar N, Chen J, Zhang X, Guo Y, Li B, Ma Q, Lee JY, Gu W, Yuan GC, Ren B, Chen K, Pu WT. Dynamic changes in P300 enhancers and enhancer-promoter contacts control mouse cardiomyocyte maturation. Dev Cell 2023; 58:898-914.e7. [PMID: 37071996 PMCID: PMC10231645 DOI: 10.1016/j.devcel.2023.03.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 02/16/2023] [Accepted: 03/05/2023] [Indexed: 04/20/2023]
Abstract
Cardiomyocyte differentiation continues throughout murine gestation and into the postnatal period, driven by temporally regulated expression changes in the transcriptome. The mechanisms that regulate these developmental changes remain incompletely defined. Here, we used cardiomyocyte-specific ChIP-seq of the activate enhancer marker P300 to identify 54,920 cardiomyocyte enhancers at seven stages of murine heart development. These data were matched to cardiomyocyte gene expression profiles at the same stages and to Hi-C and H3K27ac HiChIP chromatin conformation data at fetal, neonatal, and adult stages. Regions with dynamic P300 occupancy exhibited developmentally regulated enhancer activity, as measured by massively parallel reporter assays in cardiomyocytes in vivo, and identified key transcription factor-binding motifs. These dynamic enhancers interacted with temporal changes of the 3D genome architecture to specify developmentally regulated cardiomyocyte gene expressions. Our work provides a 3D genome-mediated enhancer activity landscape of murine cardiomyocyte development.
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Affiliation(s)
- Pingzhu Zhou
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Nathan J VanDusen
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Yanchun Zhang
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Yangpo Cao
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Isha Sethi
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Rong Hu
- Ludwig Institute for Cancer Research, Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Shuo Zhang
- Houston Methodist Hospital Research Institute, Houston, TX 77030, USA
| | - Guangyu Wang
- Cardiovascular Department, Houston Methodist, Weill Cornell Medical College, Houston, TX, USA
| | - Lincai Ye
- Department of Thoracic and Cardiovascular Surgery, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Neil Mazumdar
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Jian Chen
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Xiaoran Zhang
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Yuxuan Guo
- Peking University Health Science Center, Beijing, China
| | - Bin Li
- Ludwig Institute for Cancer Research, Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Qing Ma
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Julianna Y Lee
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA
| | - Weiliang Gu
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA; Department of Pharmacology, School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Guo-Cheng Yuan
- Department of Genetics and Genomic Sciences, Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Bing Ren
- Ludwig Institute for Cancer Research, Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Kaifu Chen
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA.
| | - William T Pu
- Department of Cardiology, Boston Children's Hospital, Boston, MA, USA; Harvard Stem Cell Institute, Cambridge, MA, USA.
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6
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Guo Y, Cao Y, Jardin BD, Zhang X, Zhou P, Guatimosim S, Lin J, Chen Z, Zhang Y, Mazumdar N, Lu F, Ma Q, Lu YW, Zhao M, Wang DZ, Dong E, Pu WT. Ryanodine receptor 2 (RYR2) dysfunction activates the unfolded protein response and perturbs cardiomyocyte maturation. Cardiovasc Res 2023; 119:221-235. [PMID: 35576474 DOI: 10.1093/cvr/cvac077] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 08/21/2021] [Revised: 04/03/2022] [Accepted: 05/05/2022] [Indexed: 11/15/2022] Open
Abstract
AIMS Calcium-handling capacity is a major gauge of cardiomyocyte maturity. Ryanodine receptor 2 (RYR2) is the pre-dominant calcium channel that releases calcium from the sarcoplasmic reticulum/endoplasmic reticulum (SR/ER) to activate cardiomyocyte contraction. Although RYR2 was previously implied as a key regulator of cardiomyocyte maturation, the mechanisms remain unclear. The aim of this study is to solve this problem. METHODS AND RESULTS We performed Cas9/AAV9-mediated somatic mutagenesis to knockout RYR2 specifically in cardiomyocytes in mice. We conducted a genetic mosaic analysis to dissect the cell-autonomous function of RYR2 during cardiomyocyte maturation. We found that RYR2 depletion triggered ultrastructural and transcriptomic defects relevant to cardiomyocyte maturation. These phenotypes were associated with the drastic activation of ER stress pathways. The ER stress alleviator tauroursodeoxycholic acid partially rescued the defects in RYR2-depleted cardiomyocytes. Overexpression of ATF4, a key ER stress transcription factor, recapitulated defects in RYR2-depleted cells. Integrative analysis of RNA-Seq and bioChIP-Seq data revealed that protein biosynthesis-related genes are the major direct downstream targets of ATF4. CONCLUSION RYR2-regulated ER homeostasis is essential for cardiomyocyte maturation. Severe ER stress perturbs cardiomyocyte maturation primarily through ATF4 activation. The major downstream effector genes of ATF4 are related to protein biosynthesis.
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Affiliation(s)
- Yuxuan Guo
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing 100191, China
- Institute of Cardiovascular Sciences, Peking University, Beijing 100191, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Yangpo Cao
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Blake D Jardin
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Xiaoran Zhang
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Pingzhu Zhou
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Silvia Guatimosim
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, Belo Horizonte MG - CEP 31270-901, Brazil
| | - Junsen Lin
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing 100191, China
- Institute of Cardiovascular Sciences, Peking University, Beijing 100191, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Zhan Chen
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing 100191, China
- Institute of Cardiovascular Sciences, Peking University, Beijing 100191, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Yueyang Zhang
- Peking University Health Science Center, School of Basic Medical Sciences, Beijing 100191, China
- Institute of Cardiovascular Sciences, Peking University, Beijing 100191, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Neil Mazumdar
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Fujian Lu
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Qing Ma
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Yao-Wei Lu
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Mingming Zhao
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, Beijing 100191, China
- NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing 100191, China
| | - Da-Zhi Wang
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
| | - Erdan Dong
- Institute of Cardiovascular Sciences, Peking University, Beijing 100191, China
- Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing 100191, China
- Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital, Beijing 100191, China
- NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Beijing 100191, China
| | - William T Pu
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA 02115, USA
- Harvard Stem Cell Institute, 7 Divinity Avenue, Cambridge, MA 02138, USA
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7
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Zhou P, Zhang Y, Sethi I, Ye L, Trembley MA, Cao Y, Akerberg BN, Xiao F, Zhang X, Li K, Jardin BD, Mazumdar N, Ma Q, He A, Zhou B, Pu WT. GATA4 Regulates Developing Endocardium Through Interaction With ETS1. Circ Res 2022; 131:e152-e168. [PMID: 36263775 PMCID: PMC9669226 DOI: 10.1161/circresaha.120.318102] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 10/07/2022] [Indexed: 01/26/2023]
Abstract
BACKGROUND The pioneer transcription factor (TF) GATA4 (GATA Binding Protein 4) is expressed in multiple cardiovascular lineages and is essential for heart development. GATA4 lineage-specific occupancy in the developing heart underlies its lineage specific activities. Here, we characterized GATA4 chromatin occupancy in cardiomyocyte and endocardial lineages, dissected mechanisms that control lineage specific occupancy, and analyzed GATA4 regulation of endocardial gene expression. METHODS We mapped GATA4 chromatin occupancy in cardiomyocyte and endocardial cells of embryonic day 12.5 (E12.5) mouse heart using lineage specific, Cre-activated biotinylation of GATA4. Regulation of GATA4 pioneering activity was studied in cell lines stably overexpressing GATA4. GATA4 regulation of endocardial gene expression was analyzed using single cell RNA sequencing and luciferase reporter assays. RESULTS Cardiomyocyte-selective and endothelial-selective GATA4 occupied genomic regions had features of lineage specific enhancers. Footprints within cardiomyocyte- and endothelial-selective GATA4 regions were enriched for NKX2-5 (NK2 homeobox 5) and ETS1 (ETS Proto-Oncogene 1) motifs, respectively, and both of these TFs interacted with GATA4 in co-immunoprecipitation assays. In stable NIH3T3 cell lines expressing GATA4 with or without NKX2-5 or ETS1, the partner TFs re-directed GATA4 pioneer binding and augmented its ability to open previously inaccessible regions, with ETS1 displaying greater potency as a pioneer partner than NKX2-5. Single-cell RNA sequencing of embryonic hearts with endothelial cell-specific Gata4 inactivation identified Gata4-regulated endocardial genes, which were adjacent to GATA4-bound, endothelial regions enriched for both GATA4 and ETS1 motifs. In reporter assays, GATA4 and ETS1 cooperatively stimulated endothelial cell enhancer activity. CONCLUSIONS Lineage selective non-pioneer TFs NKX2-5 and ETS1 guide the activity of pioneer TF GATA4 to bind and open chromatin and create active enhancers and mechanistically link ETS1 interaction to GATA4 regulation of endocardial development.
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Affiliation(s)
- Pingzhu Zhou
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Yan Zhang
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Isha Sethi
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Lincai Ye
- Department of Thoracic and Cardiovascular Surgery, Shanghai Children’s Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Michael A. Trembley
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Yangpo Cao
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Brynn N. Akerberg
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Feng Xiao
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Xiaoran Zhang
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Kai Li
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Blake D. Jardin
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Neil Mazumdar
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Qing Ma
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
| | - Aibin He
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Bin Zhou
- State Key Laboratory of Cell Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai, China
| | - William T. Pu
- Department of Cardiology, Boston Children’s Hospital, 300 Longwood Ave., Boston, MA 02115
- Harvard Stem Cell Institute, 7 Divinity Avenue, Cambridge, MA 02138
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Dutta P, Kumari A, Mahanta M, Biswas KK, Dudkiewicz A, Thakuria D, Abdelrhim AS, Singh SB, Muthukrishnan G, Sabarinathan KG, Mandal MK, Mazumdar N. Advances in Nanotechnology as a Potential Alternative for Plant Viral Disease Management. Front Microbiol 2022; 13:935193. [PMID: 35847105 PMCID: PMC9279558 DOI: 10.3389/fmicb.2022.935193] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 05/16/2022] [Indexed: 12/02/2022] Open
Abstract
Plant viruses cause enormous losses in agricultural production accounting for about 47% of the total overall crop losses caused by plant pathogens. More than 50% of the emerging plant diseases are reported to be caused by viruses, which are inevitable or unmanageable. Therefore, it is essential to devise novel and effective management strategies to combat the losses caused by the plant virus in economically important crops. Nanotechnology presents a new tendency against the increasing challenges in the diagnosis and management of plant viruses as well as plant health. The application of nanotechnology in plant virology, known as nanophytovirology, includes disease diagnostics, drug delivery, genetic transformation, therapeutants, plant defense induction, and bio-stimulation; however, it is still in the nascent stage. The unique physicochemical properties of particles in the nanoscale allow greater interaction and it may knock out the virus particles. Thus, it opens up a novel arena for the management of plant viral diseases. The main objective of this review is to focus on the mounting collection of tools and techniques involved in the viral disease diagnosis and management and to elucidate their mode of action along with toxicological concerns.
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Mironova GY, Mazumdar N, Hashad AM, El-Lakany MA, Welsh DG. Defining a Role of NADPH Oxidase in Myogenic Tone Development. Microcirculation 2022; 29:e12756. [PMID: 35289024 DOI: 10.1111/micc.12756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 03/07/2022] [Accepted: 03/09/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The myogenic response sets the foundation for blood flow control. Recent findings suggest a role for G-protein coupled receptors (GPCR) and signaling pathways tied to the generation of reactive oxygen species (ROS). In this regard, this study ascertained the impact of NADPH oxidase (Nox) on myogenic tone in rat cerebral resistance arteries. METHODS The study employed real-time qPCR (RT-qPCR), pressure myography, and immunohistochemistry. RESULTS Gq blockade abolished myogenic tone in rat cerebral arteries, linking GPCR to mechanosensation. Subsequent work revealed that general (TEMPOL) and mitochondrial specific (MitoTEMPO) ROS scavengers had little impact on myogenic tone, whereas apocynin, a broad spectrum Nox inhibitor, initiated transient dilation. RT-qPCR revealed Nox1 and Nox2 mRNA expression in smooth muscle cells. Pressure myography defined Nox1 rather than Nox2 is facilitating myogenic tone. We rationalized that Nox1-generated ROS was initiating this response by impairing the ability of the CaV 3.2 channel to elicit negative feedback via BKCa . This hypothesis was confirmed in functional experiments. The proximity ligation assay further revealed that Nox1 and CaV 3.2 colocalize within 40 nm of one another. CONCLUSIONS Our data highlight that vascular pressurization augments Nox1 activity and ensuing ROS production facilitates myogenic tone by limiting Ca2+ influx via CaV 3.2.
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Affiliation(s)
- Galina Yu Mironova
- Robarts Research Institute and Dept. of Physiology & Pharmacology, The University of Western Ontario, London, Ontario, Canada
| | - Neil Mazumdar
- Robarts Research Institute and Dept. of Physiology & Pharmacology, The University of Western Ontario, London, Ontario, Canada
| | - Ahmed M Hashad
- Robarts Research Institute and Dept. of Physiology & Pharmacology, The University of Western Ontario, London, Ontario, Canada.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Mohammed A El-Lakany
- Robarts Research Institute and Dept. of Physiology & Pharmacology, The University of Western Ontario, London, Ontario, Canada.,Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | - Donald G Welsh
- Robarts Research Institute and Dept. of Physiology & Pharmacology, The University of Western Ontario, London, Ontario, Canada
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Hashad AM, Mazumdar N, Romero M, Nygren A, Bigdely-Shamloo K, Harraz OF, Puglisi JL, Vigmond EJ, Wilson SM, Welsh DG. Interplay among distinct Ca 2+ conductances drives Ca 2+ sparks/spontaneous transient outward currents in rat cerebral arteries. J Physiol 2016; 595:1111-1126. [PMID: 27805790 DOI: 10.1113/jp273329] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 10/30/2016] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS Distinct Ca2+ channels work in a coordinated manner to grade Ca2+ spark/spontaneous transient outward currents (STOCs) in rat cerebral arteries. The relative contribution of each Ca2+ channel to Ca2+ spark/STOC production depends upon their biophysical properties and the resting membrane potential of smooth muscle. Na+ /Ca2+ exchanger, but not TRP channels, can also facilitate STOC production. ABSTRACT Ca2+ sparks are generated in a voltage-dependent manner to initiate spontaneous transient outward currents (STOCs), events that moderate arterial constriction. In this study, we defined the mechanisms by which membrane depolarization increases Ca2+ sparks and subsequent STOC production. Using perforated patch clamp electrophysiology and rat cerebral arterial myocytes, we monitored STOCs in the presence and absence of agents that modulate Ca2+ entry. Beginning with CaV 3.2 channel inhibition, Ni2+ was shown to decrease STOC frequency in cells held at hyperpolarized (-40 mV) but not depolarized (-20 mV) voltages. In contrast, nifedipine, a CaV 1.2 inhibitor, markedly suppressed STOC frequency at -20 mV but not -40 mV. These findings aligned with the voltage-dependent profiles of L- and T-type Ca2+ channels. Furthermore, computational and experimental observations illustrated that Ca2+ spark production is intimately tied to the activity of both conductances. Intriguingly, this study observed residual STOC production at depolarized voltages that was independent of CaV 1.2 and CaV 3.2. This residual component was insensitive to TRPV4 channel modulation and was abolished by Na+ /Ca2+ exchanger blockade. In summary, our work highlights that the voltage-dependent triggering of Ca2+ sparks/STOCs is not tied to a single conductance but rather reflects an interplay among multiple Ca2+ permeable pores with distinct electrophysiological properties. This integrated orchestration enables smooth muscle to grade Ca2+ spark/STOC production and thus precisely tune negative electrical feedback.
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Affiliation(s)
- Ahmed M Hashad
- Department of Physiology and Pharmacology, Hotchkiss Brain and Libin Cardiovascular Institute, University of Calgary, Alberta, Canada
| | - Neil Mazumdar
- Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada
| | - Monica Romero
- Department of Basic Sciences, Division of Pharmacology, Loma Linda University, CA, USA
| | - Anders Nygren
- Department of Electrical and Computer Engineering, University of Calgary, Calgary, Alberta, Canada
| | - Kamran Bigdely-Shamloo
- Department of Physiology and Pharmacology, Hotchkiss Brain and Libin Cardiovascular Institute, University of Calgary, Alberta, Canada.,Department of Electrical and Computer Engineering, University of Calgary, Calgary, Alberta, Canada
| | - Osama F Harraz
- Department of Pharmacology, University of Vermont, Burlington, VT, USA
| | - Jose L Puglisi
- California Northstate University College of Medicine, CA, USA
| | - Edward J Vigmond
- Department of Electrical and Computer Engineering, University of Calgary, Calgary, Alberta, Canada.,LIRYC Institute and Lab IMB, University of Bordeaux, Bordeaux, France
| | - Sean M Wilson
- Department of Basic Sciences, Division of Pharmacology, Loma Linda University, CA, USA
| | - Donald G Welsh
- Department of Physiology and Pharmacology, Hotchkiss Brain and Libin Cardiovascular Institute, University of Calgary, Alberta, Canada.,Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada
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Mufti RE, Zechariah A, Sancho M, Mazumdar N, Brett SE, Welsh DG. Implications of αvβ3 Integrin Signaling in the Regulation of Ca2+ Waves and Myogenic Tone in Cerebral Arteries. Arterioscler Thromb Vasc Biol 2015; 35:2571-8. [PMID: 26494230 DOI: 10.1161/atvbaha.115.305619] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 10/09/2015] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The myogenic response is central to blood flow regulation in the brain. Its induction is tied to elevated cytosolic [Ca(2+)], a response primarily driven by voltage-gated Ca(2+) channels and secondarily by Ca(2+) wave production. Although the signaling events leading to the former are well studied, those driving Ca(2+) waves remain uncertain. APPROACH AND RESULTS We postulated that αvβ3 integrin signaling is integral to the generation of pressure-induced Ca(2+) waves and cerebral arterial tone. This hypothesis was tested in rat cerebral arteries using the synergistic strengths of pressure myography, rapid Ca(2+) imaging, and Western blot analysis. GRGDSP, a peptide that preferentially blocks αvβ3 integrin, attenuated myogenic tone, indicating the modest role for sarcoplasmic reticulum Ca(2+) release in myogenic tone generation. The RGD peptide was subsequently shown to impair Ca(2+) wave generation and myosin light chain 20 (MLC20) phosphorylation, the latter of which was attributed to the modulation of MLC kinase and MLC phosphatase via MYPT1-T855 phosphorylation. Subsequent experiments revealed that elevated pressure enhanced phospholipase Cγ1 phosphorylation in an RGD-dependent manner and that phospholipase C inhibition attenuated Ca(2+) wave generation. Direct inhibition of inositol 1, 4, 5-triphosphate receptors also impaired Ca(2+) wave generation, myogenic tone, and MLC20 phosphorylation, partly through the T-855 phosphorylation site of MYPT1. CONCLUSIONS Our investigation reveals a hitherto unknown role for αvβ3 integrin as a cerebral arterial pressure sensor. The membrane receptor facilitates Ca(2+) wave generation through a signaling cascade, involving phospholipase Cγ1, inositol 1,3,4 triphosphate production, and inositol 1, 4, 5-triphosphate receptor activation. These discrete asynchronous Ca(2+) events facilitate MLC20 phosphorylation and, in part, myogenic tone by influencing both MLC kinase and MLC phosphatase activity.
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Affiliation(s)
- Rania E Mufti
- From the Hotchkiss Brain Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), Libin Cardiovascular Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), and Department of Physiology and Pharmacology (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), University of Calgary, Alberta, Canada; and Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada (A.Z., M.S., N.M., S.E.B., D.G.W.)
| | - Anil Zechariah
- From the Hotchkiss Brain Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), Libin Cardiovascular Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), and Department of Physiology and Pharmacology (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), University of Calgary, Alberta, Canada; and Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada (A.Z., M.S., N.M., S.E.B., D.G.W.)
| | - Maria Sancho
- From the Hotchkiss Brain Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), Libin Cardiovascular Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), and Department of Physiology and Pharmacology (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), University of Calgary, Alberta, Canada; and Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada (A.Z., M.S., N.M., S.E.B., D.G.W.)
| | - Neil Mazumdar
- From the Hotchkiss Brain Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), Libin Cardiovascular Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), and Department of Physiology and Pharmacology (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), University of Calgary, Alberta, Canada; and Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada (A.Z., M.S., N.M., S.E.B., D.G.W.)
| | - Suzanne E Brett
- From the Hotchkiss Brain Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), Libin Cardiovascular Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), and Department of Physiology and Pharmacology (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), University of Calgary, Alberta, Canada; and Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada (A.Z., M.S., N.M., S.E.B., D.G.W.)
| | - Donald G Welsh
- From the Hotchkiss Brain Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), Libin Cardiovascular Institute (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), and Department of Physiology and Pharmacology (R.E.M., A.Z., M.S., N.M., S.E.B., D.G.W.), University of Calgary, Alberta, Canada; and Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada (A.Z., M.S., N.M., S.E.B., D.G.W.).
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