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Pei L, Ouyang Z, Zhang H, Huang S, Jiang R, Liu B, Tang Y, Feng M, Yuan M, Wang H, Yao S, Shi S, Yu Z, Xu D, Gong G, Wei K. Thrombospondin 1 and Reelin act through Vldlr to regulate cardiac growth and repair. Basic Res Cardiol 2024; 119:169-192. [PMID: 38147128 DOI: 10.1007/s00395-023-01021-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 11/01/2023] [Accepted: 11/01/2023] [Indexed: 12/27/2023]
Abstract
Adult mammalian cardiomyocytes have minimal cell cycle capacity, which leads to poor regeneration after cardiac injury such as myocardial infarction. Many positive regulators of cardiomyocyte cell cycle and cardioprotective signals have been identified, but extracellular signals that suppress cardiomyocyte proliferation are poorly understood. We profiled receptors enriched in postnatal cardiomyocytes, and found that very-low-density-lipoprotein receptor (Vldlr) inhibits neonatal cardiomyocyte cell cycle. Paradoxically, Reelin, the well-known Vldlr ligand, expressed in cardiac Schwann cells and lymphatic endothelial cells, promotes neonatal cardiomyocyte proliferation. Thrombospondin1 (TSP-1), another ligand of Vldlr highly expressed in adult heart, was then found to inhibit cardiomyocyte proliferation through Vldlr, and may contribute to Vldlr's overall repression on proliferation. Mechanistically, Rac1 and subsequent Yap phosphorylation and nucleus translocation mediate the regulation of the cardiomyocyte cell cycle by TSP-1/Reelin-Vldlr signaling. Importantly, Reln mutant neonatal mice displayed impaired cardiomyocyte proliferation and cardiac regeneration after apical resection, while cardiac-specific Thbs1 deletion and cardiomyocyte-specific Vldlr deletion promote cardiomyocyte proliferation and are cardioprotective after myocardial infarction. Our results identified a novel role of Vldlr in consolidating extracellular signals to regulate cardiomyocyte cell cycle activity and survival, and the overall suppressive TSP-1-Vldlr signal may contribute to the poor cardiac repair capacity of adult mammals.
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Affiliation(s)
- Lijuan Pei
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Zhaohui Ouyang
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Hongjie Zhang
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Shiqi Huang
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Rui Jiang
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Bilin Liu
- Institute for Regenerative Medicine, School of Life Sciences and Technology, Shanghai East Hospital, Tongji University, Shanghai, 200092, China
| | - Yansong Tang
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
| | - Mengying Feng
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Min Yuan
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Haocun Wang
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Su Yao
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Shuyue Shi
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Zhao Yu
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Dachun Xu
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
| | - Guohua Gong
- Institute for Regenerative Medicine, School of Life Sciences and Technology, Shanghai East Hospital, Tongji University, Shanghai, 200092, China
| | - Ke Wei
- School of Life Sciences and Technology, Institute for Regenerative Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, School of Life Sciences and Technology, Shanghai East Hospital, Shanghai Institute of Stem Cell Research and Clinical Translation, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
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Sementino E, Kadariya Y, Cheung M, Menges CW, Tan Y, Kukuyan AM, Shrestha U, Karchugina S, Cai KQ, Peri S, Duncan JS, Chernoff J, Testa JR. Inactivation of p21-Activated Kinase 2 (Pak2) Inhibits the Development of Nf2-Deficient Tumors by Restricting Downstream Hedgehog and Wnt Signaling. Mol Cancer Res 2022; 20:699-711. [PMID: 35082167 PMCID: PMC9081258 DOI: 10.1158/1541-7786.mcr-21-0837] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/02/2021] [Accepted: 01/13/2022] [Indexed: 11/16/2022]
Abstract
Because loss of the NF2 tumor suppressor gene results in p21-activated kinase (Pak) activation, PAK inhibitors hold promise for the treatment of NF2-deficient tumors. To test this possibility, we asked if loss of Pak2, a highly expressed group I PAK member, affects the development of malignant mesothelioma in Nf2;Cdkn2a-deficient (NC) mice and the growth properties of NC mesothelioma cells in culture. In vivo, deletion of Pak2 resulted in a markedly decreased incidence and delayed onset of both pleural and peritoneal malignant mesotheliomas in NC mice. In vitro, Pak2 deletion decreased malignant mesothelioma cell viability, migration, clonogenicity, and spheroid formation. RNA-sequencing analysis demonstrated downregulated expression of Hedgehog and Wnt pathway genes in NC;Pak2-/- mesothelioma cells versus NC;Pak2+/+ mesothelioma cells. Targeting of the Hedgehog signaling component Gli1 or its target gene Myc inhibited cell viability and spheroid formation in NC;P+/+ mesothelioma cells. Kinome profiling uncovered kinase changes indicative of EMT in NC;Pak2-/- mesothelioma cells, suggesting that Pak2-deficient malignant mesotheliomas can adapt by reprogramming their kinome in the absence of Pak activity. The identification of such compensatory pathways offers opportunities for rational combination therapies to circumvent resistance to anti-PAK drugs. IMPLICATIONS We provide evidence supporting a role for PAK inhibitors in treating NF2-deficient tumors. NF2-deficient tumors lacking Pak2 eventually adapt by kinome reprogramming, presenting opportunities for combination therapies to bypass anti-PAK drug resistance.
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Affiliation(s)
- Eleonora Sementino
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Yuwaraj Kadariya
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Mitchell Cheung
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Craig W. Menges
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Yinfei Tan
- Genomics Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Anna-Mariya Kukuyan
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Ujjawal Shrestha
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Sofiia Karchugina
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Kathy Q. Cai
- Histopathology Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Suraj Peri
- Bioinformatics and Biostatistics Facility, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - James S. Duncan
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Jonathan Chernoff
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Joseph R. Testa
- Cancer Signaling and Epigenetics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania
- Joseph R. Testa, Ph.D., Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 1911; Phone: (215) 728-2610; Fax: (215) 214-1619;
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Structure and Function of Mitochondria-Associated Endoplasmic Reticulum Membranes (MAMs) and Their Role in Cardiovascular Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:4578809. [PMID: 34336092 PMCID: PMC8289621 DOI: 10.1155/2021/4578809] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 06/30/2021] [Indexed: 12/12/2022]
Abstract
Abnormal function of suborganelles such as mitochondria and endoplasmic reticulum often leads to abnormal function of cardiomyocytes or vascular endothelial cells and cardiovascular disease (CVD). Mitochondria-associated membrane (MAM) is involved in several important cellular functions. Increasing evidence shows that MAM is involved in the pathogenesis of CVD. MAM mediates multiple cellular processes, including calcium homeostasis regulation, lipid metabolism, unfolded protein response, ROS, mitochondrial dynamics, autophagy, apoptosis, and inflammation, which are key risk factors for CVD. In this review, we discuss the structure of MAM and MAM-associated proteins, their role in CVD progression, and the potential use of MAM as the therapeutic targets for CVD treatment.
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Rho GTPases Signaling in Zebrafish Development and Disease. Cells 2020; 9:cells9122634. [PMID: 33302361 PMCID: PMC7762611 DOI: 10.3390/cells9122634] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/30/2020] [Accepted: 12/07/2020] [Indexed: 02/08/2023] Open
Abstract
Cells encounter countless external cues and the specificity of their responses is translated through a myriad of tightly regulated intracellular signals. For this, Rho GTPases play a central role and transduce signals that contribute to fundamental cell dynamic and survival events. Here, we review our knowledge on how zebrafish helped us understand the role of some of these proteins in a multitude of in vivo cellular behaviors. Zebrafish studies offer a unique opportunity to explore the role and more specifically the spatial and temporal dynamic of Rho GTPases activities within a complex environment at a level of details unachievable in any other vertebrate organism.
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Peng X, Lai KS, She P, Kang J, Wang T, Li G, Zhou Y, Sun J, Jin D, Xu X, Liao L, Liu J, Lee E, Poss KD, Zhong TP. Induction of Wnt signaling antagonists and p21-activated kinase enhances cardiomyocyte proliferation during zebrafish heart regeneration. J Mol Cell Biol 2020; 13:41-58. [PMID: 33582796 PMCID: PMC8035995 DOI: 10.1093/jmcb/mjaa046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 08/14/2020] [Accepted: 08/16/2020] [Indexed: 12/13/2022] Open
Abstract
Heart regeneration occurs by dedifferentiation and proliferation of pre-existing cardiomyocytes (CMs). However, the signaling mechanisms by which injury induces CM renewal remain incompletely understood. Here, we find that cardiac injury in zebrafish induces expression of the secreted Wnt inhibitors, including Dickkopf 1 (Dkk1), Dkk3, secreted Frizzled-related protein 1 (sFrp1), and sFrp2, in cardiac tissue adjacent to injury sites. Experimental blocking of Wnt activity via Dkk1 overexpression enhances CM proliferation and heart regeneration, whereas ectopic activation of Wnt8 signaling blunts injury-induced CM dedifferentiation and proliferation. Although Wnt signaling is dampened upon injury, the cytoplasmic β-catenin is unexpectedly increased at disarrayed CM sarcomeres in myocardial wound edges. Our analyses indicated that p21-activated kinase 2 (Pak2) is induced at regenerating CMs, where it phosphorylates cytoplasmic β-catenin at Ser 675 and increases its stability at disassembled sarcomeres. Myocardial-specific induction of the phospho-mimetic β-catenin (S675E) enhances CM dedifferentiation and sarcomere disassembly in response to injury. Conversely, inactivation of Pak2 kinase activity reduces the Ser 675-phosphorylated β-catenin (pS675-β-catenin) and attenuates CM sarcomere disorganization and dedifferentiation. Taken together, these findings demonstrate that coordination of Wnt signaling inhibition and Pak2/pS675-β-catenin signaling enhances zebrafish heart regeneration by supporting CM dedifferentiation and proliferation.
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Affiliation(s)
- Xiangwen Peng
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Zhong Shan Hospital, Fudan University, Shanghai 200438, China.,Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Kaa Seng Lai
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Zhong Shan Hospital, Fudan University, Shanghai 200438, China.,Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Peilu She
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Junsu Kang
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA
| | - Tingting Wang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Guobao Li
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Zhong Shan Hospital, Fudan University, Shanghai 200438, China
| | - Yating Zhou
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Jianjian Sun
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Daqing Jin
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Xiaolei Xu
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA
| | - Lujian Liao
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
| | - Jiandong Liu
- Department of Pathology and Laboratory Medicine, McAllister Heart Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Ethan Lee
- Department of Developmental and Cell Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Kenneth D Poss
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA
| | - Tao P Zhong
- Shanghai Key Laboratory of Regulatory Biology, Institute of Molecular Medicine, East China Normal University School of Life Sciences, Shanghai 200241, China
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Juul Belling H, Hofmeister W, Andersen DC. A Systematic Exposition of Methods used for Quantification of Heart Regeneration after Apex Resection in Zebrafish. Cells 2020; 9:cells9030548. [PMID: 32111059 PMCID: PMC7140516 DOI: 10.3390/cells9030548] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/20/2020] [Accepted: 02/21/2020] [Indexed: 02/06/2023] Open
Abstract
Myocardial infarction (MI) is a worldwide condition that affects millions of people. This is mainly caused by the adult human heart lacking the ability to regenerate upon injury, whereas zebrafish have the capacity through cardiomyocyte proliferation to fully regenerate the heart following injury such as apex resection (AR). But a systematic overview of the methods used to evidence heart regrowth and regeneration in the zebrafish is lacking. Herein, we conducted a systematical search in Embase and Pubmed for studies on heart regeneration in the zebrafish following injury and identified 47 AR studies meeting the inclusion criteria. Overall, three different methods were used to assess heart regeneration in zebrafish AR hearts. 45 out of 47 studies performed qualitative (37) and quantitative (8) histology, whereas immunohistochemistry for various cell cycle markers combined with cardiomyocyte specific proteins was used in 34 out of 47 studies to determine cardiomyocyte proliferation qualitatively (6 studies) or quantitatively (28 studies). For both methods, analysis was based on selected heart sections and not the whole heart, which may bias interpretations. Likewise, interstudy comparison of reported cardiomyocyte proliferation indexes seems complicated by distinct study designs and reporting manners. Finally, six studies performed functional analysis to determine heart function, a hallmark of human heart injury after MI. In conclusion, our data implies that future studies should consider more quantitative methods eventually taking the 3D of the zebrafish heart into consideration when evidencing myocardial regrowth after AR. Furthermore, standardized guidelines for reporting cardiomyocyte proliferation and sham surgery details may be considered to enable inter study comparisons and robustly determine the effect of given genes on the process of heart regeneration.
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Affiliation(s)
- Helene Juul Belling
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, 5000 Odense C, Denmark; (H.J.B.); (W.H.)
- Clinical Institute, University of Southern Denmark, Winsloewparken 25, 1. floor, 5000 Odense C, Denmark
| | - Wolfgang Hofmeister
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, 5000 Odense C, Denmark; (H.J.B.); (W.H.)
- Clinical Institute, University of Southern Denmark, Winsloewparken 25, 1. floor, 5000 Odense C, Denmark
- Faculty of Health and Medical Sciences, DanStem, Novo Nordisk Foundation Center for Stem Cell Biology, 2200 København H, Denmark
| | - Ditte Caroline Andersen
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, 5000 Odense C, Denmark; (H.J.B.); (W.H.)
- Clinical Institute, University of Southern Denmark, Winsloewparken 25, 1. floor, 5000 Odense C, Denmark
- Correspondence:
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Dietrich J, Roth M, König S, Geerling G, Mertsch S, Schrader S. Analysis of lacrimal gland derived mesenchymal stem cell secretome and its impact on epithelial cell survival. Stem Cell Res 2019; 38:101477. [PMID: 31181482 DOI: 10.1016/j.scr.2019.101477] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 05/10/2019] [Accepted: 05/31/2019] [Indexed: 01/03/2023] Open
Abstract
In situ regeneration of lacrimal gland (LG) tissue would be a promising approach to curatively treat dry eye disease (DED). Mesenchymal stem cells (MSC) exhibit therapeutic effects in a variety of pathological conditions and our group recently reported that their number increases in regenerating mouse LG. Since the therapeutic effects are suggested to arise from secreted trophic factors, the application of MSC-secreted proteins seems to be a promising approach to induce/enhance LG regeneration. Therefore, this study aims to optimize the isolation of murine LG-MSC and analyze their secretome to investigate its potential for LG epithelial cell survival in vitro. For optimization, LG-MSC were isolated by an explant technique or cell sorting and their secretome was investigated under normal and inflammatory conditions. Results showed that the secretome of MSC had beneficial effects on the viability of ethanol-damaged LG epithelial cells. Additional, Lipocalin-2, prosaposin, ras GTPase-activating protein-binding protein 1 (Rac1) and signal transducer and activator of transcription 1 (STAT1), proteins that were up-regulated under inflammatory conditions, further improved the cell survival of ethanol-damaged LG epithelial cells. Interestingly, recovery of cell viability was highest, when the cells were incubated with STAT1. Summarizing, this study identified promising proteins for further studies on LG regeneration.
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Affiliation(s)
- Jana Dietrich
- Laboratory of Experimental Ophthalmology, Department of Ophthalmology, Pius Hospital, University of Oldenburg, 26121 Oldenburg, Germany.
| | - Mathias Roth
- Laboratory of Experimental Ophthalmology, Department of Ophthalmology, University of Duesseldorf, 40225 Duesseldorf, Germany
| | - Simone König
- Core Unit Proteomics, Interdisciplinary Center for Clinical Research, University of Muenster, 48149 Muenster, Germany
| | - Gerd Geerling
- Laboratory of Experimental Ophthalmology, Department of Ophthalmology, University of Duesseldorf, 40225 Duesseldorf, Germany
| | - Sonja Mertsch
- Laboratory of Experimental Ophthalmology, Department of Ophthalmology, Pius Hospital, University of Oldenburg, 26121 Oldenburg, Germany
| | - Stefan Schrader
- Laboratory of Experimental Ophthalmology, Department of Ophthalmology, Pius Hospital, University of Oldenburg, 26121 Oldenburg, Germany
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Abstract
PURPOSE OF REVIEW Congenital heart disease is the most common birth defect and acquired heart disease is the leading cause of death in adults. Understanding the mechanisms that drive cardiomyocyte proliferation and differentiation has the potential to advance the understanding and potentially the treatment of different cardiac pathologies, ranging from myopathies and heart failure to myocardial infarction. This review focuses on studies aimed at elucidating signal transduction pathways and molecular mechanisms that promote proliferation, differentiation, and regeneration of differentiated heart muscle cells, cardiomyocytes. RECENT FINDINGS There is now significant evidence that demonstrates cardiomyocytes continue to proliferate into adulthood. Potential regulators have been identified, including cell cycle regulators, extracellular ligands such as neuregulin, epigenetic targets, reactive oxygen species, and microRNA. The necessary steps should involve validating and applying the new knowledge about cardiomyocyte regeneration towards the development of therapeutic targets for patients. This will be facilitated by the application of standardized pre-clinical models to study cardiomyocyte regeneration.
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Wang Y, Wang S, Lei M, Boyett M, Tsui H, Liu W, Wang X. The p21-activated kinase 1 (Pak1) signalling pathway in cardiac disease: from mechanistic study to therapeutic exploration. Br J Pharmacol 2017; 175:1362-1374. [PMID: 28574147 DOI: 10.1111/bph.13872] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/12/2017] [Accepted: 05/17/2017] [Indexed: 01/01/2023] Open
Abstract
p21-activated kinase 1 (Pak1) is a member of the highly conserved family of serine/threonine protein kinases regulated by Ras-related small G-proteins, Cdc42/Rac1. It has been previously demonstrated to be involved in cardiac protection. Based on recent studies, this review provides an overview of the role of Pak1 in cardiac diseases including disrupted Ca2+ homoeostasis-related cardiac arrhythmias, adrenergic stress- and pressure overload-induced hypertrophy, and ischaemia/reperfusion injury. These findings demonstrate the important role of Pak1 mediated through the phosphorylation and transcriptional modification of hypertrophy and/or arrhythmia-related genes. This review also discusses the anti-arrhythmic and anti-hypertrophic, protective function of Pak1 and the beneficial effects of fingolimod (an FDA-approved sphingolipid drug), a Pak1 activator, and its ability to prevent arrhythmias and cardiac hypertrophy. These findings also highlight the therapeutic potential of Pak1 signalling in the treatment and prevention of cardiac diseases. LINKED ARTICLES This article is part of a themed section on Spotlight on Small Molecules in Cardiovascular Diseases. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v175.8/issuetoc.
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Affiliation(s)
- Yanwen Wang
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Shunyao Wang
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Ming Lei
- Department of Pharmacology, The University of Oxford, Oxford, UK
| | - Mark Boyett
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Hoyee Tsui
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Wei Liu
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
| | - Xin Wang
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
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Kumar R, Sanawar R, Li X, Li F. Structure, biochemistry, and biology of PAK kinases. Gene 2016; 605:20-31. [PMID: 28007610 DOI: 10.1016/j.gene.2016.12.014] [Citation(s) in RCA: 151] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 11/24/2016] [Accepted: 12/14/2016] [Indexed: 02/07/2023]
Abstract
PAKs, p21-activated kinases, play central roles and act as converging junctions for discrete signals elicited on the cell surface and for a number of intracellular signaling cascades. PAKs phosphorylate a vast number of substrates and act by remodeling cytoskeleton, employing scaffolding, and relocating to distinct subcellular compartments. PAKs affect wide range of processes that are crucial to the cell from regulation of cell motility, survival, redox, metabolism, cell cycle, proliferation, transformation, stress, inflammation, to gene expression. Understandably, their dysregulation disrupts cellular homeostasis and severely impacts key cell functions, and many of those are implicated in a number of human diseases including cancers, neurological disorders, and cardiac disorders. Here we provide an overview of the members of the PAK family and their current status. We give special emphasis to PAK1 and PAK4, the prototypes of groups I and II, for their profound roles in cancer, the nervous system, and the heart. We also highlight other family members. We provide our perspective on the current advancements, their growing importance as strategic therapeutic targets, and our vision on the future of PAKs.
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Affiliation(s)
- Rakesh Kumar
- Department of Biochemistry and Molecular Medicine, School of Medicine and Health Sciences, George Washington University, Washington, DC 20037, USA; Cancer Biology Program, Rajiv Gandhi Center of Biotechnology, Thiruvananthapuram 695014, India.
| | - Rahul Sanawar
- Cancer Biology Program, Rajiv Gandhi Center of Biotechnology, Thiruvananthapuram 695014, India
| | - Xiaodong Li
- Department of Cell Biology, Key Laboratory of Medical Cell Biology, Chinese Ministry of Education, China Medical University, Shenyang 110122, China
| | - Feng Li
- Department of Cell Biology, Key Laboratory of Medical Cell Biology, Chinese Ministry of Education, China Medical University, Shenyang 110122, China.
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Bloomekatz J, Galvez-Santisteban M, Chi NC. Myocardial plasticity: cardiac development, regeneration and disease. Curr Opin Genet Dev 2016; 40:120-130. [PMID: 27498024 DOI: 10.1016/j.gde.2016.05.029] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 05/29/2016] [Indexed: 01/14/2023]
Abstract
The adult mammalian heart is unable to recover from myocardial cell loss due to cardiac ischemia and infarction because terminally differentiated cardiomyocytes proliferate at a low rate. However, cardiomyocytes in other vertebrate animal models such as zebrafish, axolotls, newts and mammalian mouse neonates are capable of de-differentiating in order to promote cardiomyocyte proliferation and subsequent cardiac regeneration after injury. Although de-differentiation may occur in adult mammalian cardiomyocytes, it is typically associated with diseased hearts and pathologic remodeling rather than repair and regeneration. Here, we review recent studies of cardiac development, regeneration and disease that highlight how changes in myocardial identity (plasticity) is regulated and impacts adaptive and maladaptive cardiac responses.
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Affiliation(s)
- Joshua Bloomekatz
- Department of Medicine, Division of Cardiology, University of California, San Diego, La Jolla, CA 92093, USA
| | - Manuel Galvez-Santisteban
- Department of Medicine, Division of Cardiology, University of California, San Diego, La Jolla, CA 92093, USA
| | - Neil C Chi
- Department of Medicine, Division of Cardiology, University of California, San Diego, La Jolla, CA 92093, USA; Institute of Genomic Medicine, University of California, San Diego, La Jolla, CA 92093, USA.
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