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Gulej R, Nyúl-Tóth Á, Csik B, Patai R, Petersen B, Negri S, Chandragiri SS, Shanmugarama S, Mukli P, Yabluchanskiy A, Conley S, Huffman D, Tarantini S, Csiszar A, Ungvari Z. Young blood-mediated cerebromicrovascular rejuvenation through heterochronic parabiosis: enhancing blood-brain barrier integrity and capillarization in the aged mouse brain. GeroScience 2024; 46:4415-4442. [PMID: 38727872 PMCID: PMC11336025 DOI: 10.1007/s11357-024-01154-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 04/05/2024] [Indexed: 06/15/2024] Open
Abstract
Age-related cerebromicrovascular changes, including blood-brain barrier (BBB) disruption and microvascular rarefaction, play a significant role in the development of vascular cognitive impairment (VCI) and neurodegenerative diseases. Utilizing the unique model of heterochronic parabiosis, which involves surgically joining young and old animals, we investigated the influence of systemic factors on these vascular changes. Our study employed heterochronic parabiosis to explore the effects of young and aged systemic environments on cerebromicrovascular aging in mice. We evaluated microvascular density and BBB integrity in parabiotic pairs equipped with chronic cranial windows, using intravital two-photon imaging techniques. Our results indicate that short-term exposure to young systemic factors leads to both functional and structural rejuvenation of cerebral microcirculation. Notably, we observed a marked decrease in capillary density and an increase in BBB permeability to fluorescent tracers in the cortices of aged mice undergoing isochronic parabiosis (20-month-old C57BL/6 mice [A-(A)]; 6 weeks of parabiosis), compared to young isochronic parabionts (6-month-old, [Y-(Y)]). However, aged heterochronic parabionts (A-(Y)) exposed to young blood exhibited a significant increase in cortical capillary density and restoration of BBB integrity. In contrast, young mice exposed to old blood from aged parabionts (Y-(A)) rapidly developed cerebromicrovascular aging traits, evidenced by reduced capillary density and increased BBB permeability. These findings underscore the profound impact of systemic factors in regulating cerebromicrovascular aging. The rejuvenation observed in the endothelium, following exposure to young blood, suggests the existence of anti-geronic elements that counteract microvascular aging. Conversely, pro-geronic factors in aged blood appear to accelerate cerebromicrovascular aging. Further research is needed to assess whether the rejuvenating effects of young blood factors could extend to other age-related cerebromicrovascular pathologies, such as microvascular amyloid deposition and increased microvascular fragility.
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Affiliation(s)
- Rafal Gulej
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Ádám Nyúl-Tóth
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Boglarka Csik
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Roland Patai
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Benjamin Petersen
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Sharon Negri
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Siva Sai Chandragiri
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Santny Shanmugarama
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Peter Mukli
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Andriy Yabluchanskiy
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK, USA
| | - Shannon Conley
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Derek Huffman
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Stefano Tarantini
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK, USA
| | - Anna Csiszar
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK, USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Zoltan Ungvari
- Vascular Cognitive Impairment, Neurodegeneration, and Healthy Brain Aging Program, Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- Oklahoma Center for Geroscience and Healthy Brain Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary.
- Stephenson Cancer Center, University of Oklahoma, Oklahoma City, OK, USA.
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2
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Chiu HW, Chou CL, Lee KT, Shih CC, Huang TH, Sung LC. Nattokinase attenuates endothelial inflammation through the activation of SRF and THBS1. Int J Biol Macromol 2024; 268:131779. [PMID: 38679250 DOI: 10.1016/j.ijbiomac.2024.131779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/18/2024] [Accepted: 04/21/2024] [Indexed: 05/01/2024]
Abstract
Natto contains a potent fibrinolytic enzyme called nattokinase (NK), which has thrombolytic, antihypertensive, antiatherosclerotic and lipid-lowering effects. Although NK has been recognized for its beneficial effect on humans with atherosclerotic cardiovascular disease (ASCVD), the underlying mechanisms involved in vascular inflammation-atherosclerosis development remain largely unknown. The current study aimed to explore the effects of NK on gene regulation, autophagy, necroptosis and inflammasome in vascular inflammation. The transcriptional profiles of NK in endothelial cells (ECs) by RNA sequencing (RNA-seq) revealed that NK affected THBS1, SRF and SREBF1 mRNA expression. In Q-PCR analysis, SRF and THBS1 were upregulated but SREBF1 was unaffected in ECs treated with NK. NK treatment induced autophagy and inhibited NLRP3 inflammasome and necroptosis in ECs. Furthermore, the inhibition of SRF or THBS1 by siRNA suppressed autophagy and enhanced the NLRP3 inflammasome and necroptosis. In a mouse model, NK reduced vascular inflammation by activating autophagy and inhibiting NLRP3 inflammasome and necroptosis. Our findings provide the first evidence that NK upregulates SRF and THBS1 genes, subsequently increasing autophagy and decreasing necroptosis and NLRP3 inflammasome formation to reduce vascular inflammation. Therefore, NK could serve as nutraceuticals or adjuvant therapies to reduce vascular inflammation and possible atherosclerosis progression.
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Affiliation(s)
- Hui-Wen Chiu
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Department of Medical Research, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan; Ph.D. Program in Drug Discovery and Development Industry, College of Pharmacy, Taipei Medical University, Taipei, Taiwan; TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan
| | - Chu-Lin Chou
- TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan; Division of Nephrology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Division of Nephrology, Department of Internal Medicine, Hsin Kuo Min Hospital, Taipei Medical University, Taoyuan City, Taiwan; Division of Nephrology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Kung-Ta Lee
- Department of Biochemical Science and Technology, National Taiwan University, Taipei, Taiwan
| | - Chun-Che Shih
- Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan; Division of Cardiovascular Surgery, Department of Surgery, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Tzu-Hsuan Huang
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Li-Chin Sung
- TMU Research Center of Urology and Kidney, Taipei Medical University, Taipei, Taiwan; Taipei Heart Institute, Taipei Medical University, Taipei, Taiwan; Division of Cardiology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; Division of Cardiology, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan; Department of General Medicine, Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan.
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3
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Payne S, Neal A, De Val S. Transcription factors regulating vasculogenesis and angiogenesis. Dev Dyn 2024; 253:28-58. [PMID: 36795082 PMCID: PMC10952167 DOI: 10.1002/dvdy.575] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 02/06/2023] [Accepted: 02/06/2023] [Indexed: 02/17/2023] Open
Abstract
Transcription factors (TFs) play a crucial role in regulating the dynamic and precise patterns of gene expression required for the initial specification of endothelial cells (ECs), and during endothelial growth and differentiation. While sharing many core features, ECs can be highly heterogeneous. Differential gene expression between ECs is essential to pattern the hierarchical vascular network into arteries, veins and capillaries, to drive angiogenic growth of new vessels, and to direct specialization in response to local signals. Unlike many other cell types, ECs have no single master regulator, instead relying on differing combinations of a necessarily limited repertoire of TFs to achieve tight spatial and temporal activation and repression of gene expression. Here, we will discuss the cohort of TFs known to be involved in directing gene expression during different stages of mammalian vasculogenesis and angiogenesis, with a primary focus on development.
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Affiliation(s)
- Sophie Payne
- Department of Physiology, Anatomy and GeneticsInstitute of Developmental and Regenerative Medicine, University of OxfordOxfordUK
| | - Alice Neal
- Department of Physiology, Anatomy and GeneticsInstitute of Developmental and Regenerative Medicine, University of OxfordOxfordUK
| | - Sarah De Val
- Department of Physiology, Anatomy and GeneticsInstitute of Developmental and Regenerative Medicine, University of OxfordOxfordUK
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Itoh K, Ossipova O, Matsuda M, Sokol SY. Myocardin-related transcription factors regulate morphogenetic events in vertebrate embryos by controlling F-actin organization and apical constriction. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.27.559818. [PMID: 37808688 PMCID: PMC10557707 DOI: 10.1101/2023.09.27.559818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Myocardin-related transcription factors (Mrtfa and Mrtfb), also known as megakaryoblastic leukemia proteins (Mkl1/MAL and Mkl2), associate with serum response factor (Srf) to regulate transcription in response to actin dynamics, however, the functions of Mrtfs in early vertebrate embryos remain largely unknown. Here we document the requirement of Mrtfs for blastopore closure at gastrulation and neural plate folding in Xenopus early embryos. Both stimulation and inhibition of Mrtf activity caused similar gross morphological phenotypes, yet the effects on F-actin distribution and cell behavior were different. Suppressing Mrtf-dependent transcription reduced overall F-actin levels and inhibited apical constriction during gastrulation and neurulation. By contrast, constitutively active Mrtf caused tricellular junction remodeling and induced apical constriction in superficial ectoderm. The underlying mechanism appeared distinct from the one utilized by known apical constriction inducers. We propose that the regulation of apical constriction is among the primary cellular responses to Mrtf. Our findings highlight a dedicated role of specific transcription factors, Mrtfs, in early morphogenetic processes.
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Lu Y, Li W, Li Y, Zhai W, Zhou X, Wu Z, Jiang S, Liu T, Wang H, Hu R, Zhou Y, Zou J, Hu P, Guan G, Xu Q, Canário AVM, Chen L. Population genomics of an icefish reveals mechanisms of glacier-driven adaptive radiation in Antarctic notothenioids. BMC Biol 2022; 20:231. [PMID: 36224580 PMCID: PMC9560024 DOI: 10.1186/s12915-022-01432-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 10/03/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Antarctica harbors the bulk of the species diversity of the dominant teleost fish suborder-Notothenioidei. However, the forces that shape their evolution are still under debate. RESULTS We sequenced the genome of an icefish, Chionodraco hamatus, and used population genomics and demographic modelling of sequenced genomes of 52 C. hamatus individuals collected mainly from two East Antarctic regions to investigate the factors driving speciation. Results revealed four icefish populations with clear reproduction separation were established 15 to 50 kya (kilo years ago) during the last glacial maxima (LGM). Selection sweeps in genes involving immune responses, cardiovascular development, and photoperception occurred differentially among the populations and were correlated with population-specific microbial communities and acquisition of distinct morphological features in the icefish taxa. Population and species-specific antifreeze glycoprotein gene expansion and glacial cycle-paced duplication/degeneration of the zona pellucida protein gene families indicated fluctuating thermal environments and periodic influence of glacial cycles on notothenioid divergence. CONCLUSIONS We revealed a series of genomic evidence indicating differential adaptation of C. hamatus populations and notothenioid species divergence in the extreme and unique marine environment. We conclude that geographic separation and adaptation to heterogeneous pathogen, oxygen, and light conditions of local habitats, periodically shaped by the glacial cycles, were the key drivers propelling species diversity in Antarctica.
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Affiliation(s)
- Ying Lu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Wenhao Li
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Yalin Li
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Wanying Zhai
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Xuming Zhou
- Institute of Zoology, Chinese Academy of Science, Beijing, China
| | - Zhichao Wu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Shouwen Jiang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Taigang Liu
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
- College of Information Technology, Shanghai Ocean University, Shanghai, China
| | - Huamin Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Ruiqin Hu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Yan Zhou
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Jun Zou
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Peng Hu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Guijun Guan
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China
| | - Qianghua Xu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China.
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China.
| | - Adelino V M Canário
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China.
- Centre of Marine Sciences (CCMAR-CIMAR LA), University of Algarve, Faro, Portugal.
| | - Liangbiao Chen
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education), Shanghai Ocean University, Shanghai, China.
- International Research Center for Marine Biosciences (Ministry of Science and Technology), Shanghai Ocean University, Shanghai, China.
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Zheng G, He Z, Lu Y, Zhu Q, Jiang Y, Chen D, Lin S, Zhu C, Schwartz R. SRF-derived miR210 and miR30c both repress beating cardiomyocyte formation in the differentiation system of embryoid body. Biochem Biophys Res Commun 2022; 626:58-65. [PMID: 35970045 DOI: 10.1016/j.bbrc.2022.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 07/16/2022] [Accepted: 08/04/2022] [Indexed: 11/02/2022]
Abstract
Serum response factor (SRF) cooperates with various co-factors to manage the specification of diverse cell lineages during heart development. Many microRNAs mediate the function of SRF in this process. However, how are miR210 and miR30c involved in the decision of cardiac cell fates remains to be explored. In this study, we found that SRF directly controlled the cardiac expression of miR210. Both miR210 and miR30c blocked the formation of beating cardiomyocyte during embryoid body (EB) differentiation, a cellular model widely used for studying cardiogenesis. Both of anticipated microRNA targets and differentially expressed genes in day8 EBs were systematically determined and enriched with gene ontology (GO), Kyoto encyclopedia of genes and genomes (KEGG) and Reactome. Functional enrichments of prediction microRNA targets and down-regulated genes in day8 EBs of miR210 suggested the importance of PI3K-Akt signal and ETS2 in miR210 inhibition of cardiomyocyte differentiation. Similar analyses revealed that miR30c repressed both developmental progress and the adrenergic signaling in cardiomyocytes during the differentiation of EBs. Taken together, SRF directs the expression of miR210 and miR30c, and they repress cardiac development via inhibiting the differentiation of cardiac muscle cell lineage as well as the cell proliferation. Through the regulation of specific microRNAs, the complication of SRF's function in heart development is emphasized.
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Affiliation(s)
- Guoxing Zheng
- The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, 518107, China; Department of Biology and Biochemistry, The University of Houston, Houston, TX, USA.
| | - Zhuzhen He
- Shenzhen Amcare Maternity Hospital, Shenzhen, Guangdong, 518052, China
| | - Yingsi Lu
- The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, 518107, China
| | - Qingqing Zhu
- The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, 518107, China
| | - Yizhou Jiang
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, 518060, China
| | - Demeng Chen
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
| | - Shuibin Lin
- Center for Translational Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China
| | - Chengming Zhu
- The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, 518107, China
| | - Robert Schwartz
- Department of Biology and Biochemistry, The University of Houston, Houston, TX, USA.
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7
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Kiss T, Nyúl-Tóth Á, Gulej R, Tarantini S, Csipo T, Mukli P, Ungvari A, Balasubramanian P, Yabluchanskiy A, Benyo Z, Conley SM, Wren JD, Garman L, Huffman DM, Csiszar A, Ungvari Z. Old blood from heterochronic parabionts accelerates vascular aging in young mice: transcriptomic signature of pathologic smooth muscle remodeling. GeroScience 2022; 44:953-981. [PMID: 35124764 PMCID: PMC9135944 DOI: 10.1007/s11357-022-00519-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 01/16/2022] [Indexed: 02/07/2023] Open
Abstract
Vascular aging has a central role in the pathogenesis of cardiovascular diseases contributing to increased mortality of older adults. There is increasing evidence that, in addition to the documented role of cell-autonomous mechanisms of aging, cell-nonautonomous mechanisms also play a critical role in the regulation of vascular aging processes. Our recent transcriptomic studies (Kiss T. et al. Geroscience. 2020;42(2):727-748) demonstrated that circulating anti-geronic factors from young blood promote vascular rejuvenation in aged mice. The present study was designed to expand upon the results of this study by testing the hypothesis that circulating pro-geronic factors also contribute to the genesis of vascular aging phenotypes. To test this hypothesis, through heterochronic parabiosis, we determined the extent to which shifts in the vascular transcriptome (RNA-seq) are modulated by the old systemic environment. We reanalyzed existing RNA-seq data, comparing the transcriptome in the aorta arch samples isolated from isochronic parabiont aged (20-month-old) C57BL/6 mice [A-(A); parabiosis for 8 weeks] and young isochronic parabiont (6-month-old) mice [Y-(Y)] and also assessing transcriptomic changes in the aortic arch in young (6-month-old) parabiont mice [Y-(A); heterochronic parabiosis for 8 weeks] induced by the presence of old blood derived from aged (20-month-old) parabionts. We identified 528 concordant genes whose expression levels differed in the aged phenotype and were shifted towards the aged phenotype by the presence of old blood in young Y-(A) animals. Among them, the expression of 221 concordant genes was unaffected by the presence of young blood in A-(Y) mice. GO enrichment analysis suggests that old blood-regulated genes may contribute to pathologic vascular remodeling. IPA Upstream Regulator analysis (performed to identify upstream transcriptional regulators that may contribute to the observed transcriptomic changes) suggests that the mechanism of action of pro-geronic factors present in old blood may include inhibition of pathways mediated by SRF (serum response factor), insulin-like growth factor-1 (IGF-1) and VEGF-A. In conclusion, relatively short-term exposure to old blood can accelerate vascular aging processes. Our findings provide additional evidence supporting the significant plasticity of vascular aging and the existence of circulating pro-geronic factors mediating pathological remodeling of the vascular smooth muscle cells and the extracellular matrix.
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Affiliation(s)
- Tamas Kiss
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- International Training Program in Geroscience, First Department of Pediatrics, Semmelweis University, Budapest, Hungary
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Ádám Nyúl-Tóth
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- International Training Program in Geroscience, Institute of Biophysics, Biological Research Centre, Eötvös Loránd Research Network (ELKH), Szeged, Hungary
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Rafal Gulej
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Stefano Tarantini
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 USA
| | - Tamas Csipo
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
| | - Peter Mukli
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Physiology, Semmelweis University, Budapest, Hungary
| | - Anna Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Priya Balasubramanian
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Andriy Yabluchanskiy
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Zoltan Benyo
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Translational Medicine, Semmelweis University, Budapest, Hungary
| | - Shannon M. Conley
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
| | - Jonathan D. Wren
- Oklahoma Medical Research Foundation, Genes & Human Disease Research Program, Oklahoma City, OK USA
| | - Lori Garman
- Oklahoma Medical Research Foundation, Genes & Human Disease Research Program, Oklahoma City, OK USA
| | - Derek M. Huffman
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461 USA
- Institute for Aging Research, Albert Einstein College of Medicine, Bronx, NY USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY USA
| | - Anna Csiszar
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Translational Medicine, Semmelweis University, Budapest, Hungary
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 USA
- International Training Program in Geroscience, Theoretical Medicine Doctoral School, University of Szeged, Szeged, Hungary
| | - Zoltan Ungvari
- Vascular Cognitive Impairment and Neurodegeneration Program, Oklahoma Center for Geroscience and Healthy Brain Aging, Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- International Training Program in Geroscience, Doctoral School of Basic and Translational Medicine/Department of Public Health, Semmelweis University, Budapest, Hungary
- Department of Health Promotion Sciences, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK USA
- The Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104 USA
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8
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Chen Y, Yang M, Meng F, Zhang Y, Wang M, Guo X, Yang J, Zhang H, Zhang H, Sun J, Wang W. SRSF3 Promotes Angiogenesis in Colorectal Cancer by Splicing SRF. Front Oncol 2022; 12:810610. [PMID: 35198444 PMCID: PMC8859257 DOI: 10.3389/fonc.2022.810610] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 01/17/2022] [Indexed: 12/14/2022] Open
Abstract
SRSF3, an important member of the serine/arginine-rich protein (SRp) family, is highly expressed in various tumors and plays an important role in tumor cell proliferation, migration and invasion. However, it is still unclear whether SRSF3 is involved in tumor angiogenesis. In this study, we first revealed that SRSF3 regulated the expression of numerous genes related to angiogenesis, including proangiogenic SRF. Then, we confirmed that SRSF3 was highly expressed in colorectal cancer (CRC) and was positively correlated with SRF. Mechanistic studies revealed that SRSF3 directly bound to the “CAUC” motif in exon 6 of SRF and induced the exclusion of introns. Knockdown of SRSF3 significantly reduced the secretion of VEGF from CRC cells. Conditioned medium from SRSF3-knockdown CRC cells significantly inhibited the migration, invasion and tube formation of human umbilical vein endothelial cells (HUVECs). In addition, SRF silencing inhibited angiogenesis, while SRF overexpression reversed the antiangiogenic effects of SRSF3 knockdown on tube formation. These findings indicate that SRSF3 is involved in the splicing of SRF and thereby regulates the angiogenesis of CRC, which offers novel insight into antiangiogenic therapy in CRC.
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Affiliation(s)
- Yinshuang Chen
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Man Yang
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Fanyi Meng
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Yawen Zhang
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Mengmeng Wang
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Xuqin Guo
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Jie Yang
- Institute of Medical Technology, Suzhou Vocational Health College, Suzhou, China
| | - Hongjian Zhang
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Haiyang Zhang
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
| | - Jing Sun
- Institute of Medical Technology, Suzhou Vocational Health College, Suzhou, China
| | - Weipeng Wang
- Center for Drug Metabolism and Pharmacokinetics, College of Pharmaceutical Sciences, Soochow University, Suzhou, China
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9
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Establishment of a developmental toxicity assay based on human iPSC reporter to detect FGF signal disruption. iScience 2022; 25:103770. [PMID: 35146387 PMCID: PMC8819105 DOI: 10.1016/j.isci.2022.103770] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 12/13/2021] [Accepted: 01/11/2022] [Indexed: 12/15/2022] Open
Abstract
The number of man-made chemicals has increased exponentially recently, and exposure to some of them can induce fetal malformations. Because complex and precisely programmed signaling pathways play important roles in developmental processes, their disruption by external chemicals often triggers developmental toxicity. However, highly accurate and high-throughput screening assays for potential developmental toxicants are currently lacking. In this study, we propose a reporter assay that utilizes human-induced pluripotent stem cells (iPSCs) to detect changes in fibroblast growth factor signaling, which is essential for limb morphogenesis. The dynamics of this signaling after exposure to a chemical were integrated to estimate the degree of signaling disruption, which afforded a good prediction of the capacity of chemicals listed in the ECVAM International Validation Study that induce limb malformations. This study presents an initial report of a human iPSC-based signaling disruption assay, which could be useful for the screening of potential developmental toxicants. Human iPSC-based FGF signal disruption reporter system was established FGF signal disruption was a good indicator of limb malformation-related toxicants Integration of dynamic FGF signal disruption results improved assay performance
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10
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Qiang W, Wei R, Chen Y, Chen D. Clinical Pathological Features and Current Animal Models of Type 3 Macular Neovascularization. Front Neurosci 2021; 15:734860. [PMID: 34512255 PMCID: PMC8427186 DOI: 10.3389/fnins.2021.734860] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 07/29/2021] [Indexed: 02/05/2023] Open
Abstract
Type 3 macular neovascularization (MNV3), or retinal angiomatous proliferation (RAP), is a distinct type of neovascular age-related macular degeneration (AMD), which is a leading cause of vision loss in older persons. During the past decade, systematic investigation into the clinical, multimodal imaging, and histopathological features and therapeutic outcomes has provided important new insight into this disease. These studies favor the retinal origin of MNV3 and suggest the involvement of retinal hypoxia, inflammation, von Hippel–Lindau (VHL)–hypoxia-inducible factor (HIF)–vascular endothelial growth factor (VEGF) pathway, and multiple cell types in the development and progression of MNV3. Several mouse models, including the recently built Rb/p107/Vhl triple knockout mouse model by our group, have induced many of the histological features of MNV3 and provided much insight into the underlying pathological mechanisms. These models have revealed the roles of retinal hypoxia, inflammation, lipid metabolism, VHL/HIF pathway, and retinoblastoma tumor suppressor (Rb)–E2F cell cycle pathway in the development of MNV3. This article will summarize the clinical, multimodal imaging, and pathological features of MNV3 and the diversity of animal models that exist for MNV3, as well as their strengths and limitations.
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Affiliation(s)
- Wei Qiang
- Research Laboratory of Ophthalmology and Vision Sciences, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - Ran Wei
- Research Laboratory of Ophthalmology and Vision Sciences, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - Yongjiang Chen
- The School of Optometry and Vision Science, University of Waterloo, Waterloo, ON, Canada
| | - Danian Chen
- Research Laboratory of Ophthalmology and Vision Sciences, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
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11
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Sun MA, Wolf G, Wang Y, Senft AD, Ralls S, Jin J, Dunn-Fletcher CE, Muglia LJ, Macfarlan TS. Endogenous retroviruses drive lineage-specific regulatory evolution across primate and rodent placentae. Mol Biol Evol 2021; 38:4992-5004. [PMID: 34320657 DOI: 10.1093/molbev/msab223] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In mammals, the placenta mediates maternal-fetal nutrient and waste exchange and acts in an immunomodulatory way to facilitate maternal-fetal tolerance. The placenta is highly diverse across mammalian species, yet the molecular mechanisms that distinguish the placenta of human from other mammals are not fully understood. Using an interspecies transcriptomic comparison of human, macaque, and mouse late-gestation placentae, we identified hundreds of genes with lineage-specific expression-including dozens that are placentally-enriched and potentially related to pregnancy. We further annotated the enhancers for different human tissues using epigenomic data and demonstrate that the placenta and chorion are unique in that their enhancers display the least conservation. We identified numerous lineage-specific human placental enhancers and found they highly overlap with specific families of endogenous retroviruses (ERVs), including MER21A, MER41A/B and MER39B that were previously linked to immune response and placental function. Among these ERV families, we further demonstrate that MER41A/B insertions create dozens of lineage-specific Serum Response Factor (SRF) binding loci in human, including one adjacent to FBN2, a placenta-specific gene with increased expression in humans that produces the peptide hormone placensin to stimulate glucose secretion and trophoblast invasion. Overall, our results demonstrate the prevalence of lineage-specific placental enhancers which are frequently associated with ERV insertions and likely facilitate the lineage-specific evolution of the mammalian placenta.
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Affiliation(s)
- Ming-An Sun
- The Eunice Kennedy Shriver National Institutes of Child Health and Human Development, NIH, Bethesda, MD, 20892, USA.,Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu, China
| | - Gernot Wolf
- The Eunice Kennedy Shriver National Institutes of Child Health and Human Development, NIH, Bethesda, MD, 20892, USA
| | - Yejun Wang
- School of Basic Medicine, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Anna D Senft
- The Eunice Kennedy Shriver National Institutes of Child Health and Human Development, NIH, Bethesda, MD, 20892, USA
| | - Sherry Ralls
- The Eunice Kennedy Shriver National Institutes of Child Health and Human Development, NIH, Bethesda, MD, 20892, USA
| | - Jinpu Jin
- The Eunice Kennedy Shriver National Institutes of Child Health and Human Development, NIH, Bethesda, MD, 20892, USA
| | - Caitlin E Dunn-Fletcher
- Division of Human Genetics, Center for Prevention of Preterm Birth, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Physician-Scientist Training Program in Pediatrics, Department of Pediatrics, University of Texas Southwestern, Dallas, Texas, USA
| | - Louis J Muglia
- Division of Human Genetics, Center for Prevention of Preterm Birth, Perinatal Institute, Cincinnati Children's Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Burroughs Wellcome Fund, Research Triangle Park, NC, 27709, USA
| | - Todd S Macfarlan
- The Eunice Kennedy Shriver National Institutes of Child Health and Human Development, NIH, Bethesda, MD, 20892, USA
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12
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Yang Y, Wang H, Zhao H, Miao X, Guo Y, Zhuo L, Xu Y. A GSK3-SRF Axis Mediates Angiotensin II Induced Endothelin Transcription in Vascular Endothelial Cells. Front Cell Dev Biol 2021; 9:698254. [PMID: 34381779 PMCID: PMC8350349 DOI: 10.3389/fcell.2021.698254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 07/09/2021] [Indexed: 12/14/2022] Open
Abstract
Endothelin, encoded by ET1, is a vasoactive substance primarily synthesized in vascular endothelial cells (VECs). Elevation of endothelin levels, due to transcriptional hyperactivation, has been observed in a host of cardiovascular diseases. We have previously shown that serum response factor (SRF) is a regulator of ET1 transcription in VECs. Here we report that angiotensin II (Ang II) induced ET1 transcription paralleled activation of glycogen synthase kinase 3 (GSK3) in cultured VECs. GSK3 knockdown or pharmaceutical inhibition attenuated Ang II induced endothelin expression. Of interest, the effect of GSK3 on endothelin transcription relied on the conserved SRF motif within the ET1 promoter. Further analysis revealed that GSK3 interacted with and phosphorylated SRF at serine 224. Phosphorylation of SRF by GSK3 did not influence its recruitment to the ET1 promoter. Instead, GSK3-mediated SRF phosphorylation potentiated its interaction with MRTF-A, a key co-factor for SRF, which helped recruit the chromatin remodeling protein BRG1 to the ET1 promoter resulting in augmented histone H3 acetylation/H3K4 trimethylation. Consistently, over-expression of a constitutively active GSK enhanced Ang II-induced ET1 transcription and knockdown of either MRTF-A or BRG1 abrogated the enhancement of ET1 transcription. In conclusion, our data highlight a previously unrecognized mechanism that contributes to the transcriptional regulation of endothelin. Targeting this GSK3-SRF axis may yield novel approaches in the intervention of cardiovascular diseases.
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Affiliation(s)
- Yuyu Yang
- Jiangsu Key Laboratory for Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
| | - Huidi Wang
- Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Hongwei Zhao
- Jiangsu Key Laboratory for Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - Xiulian Miao
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,College of Life Sciences, Liaocheng University, Liaocheng, China
| | - Yan Guo
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,College of Life Sciences, Liaocheng University, Liaocheng, China
| | - Lili Zhuo
- Department of Geriatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yong Xu
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,Key Laboratory of Targeted Intervention of Cardiovascular Disease and Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
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13
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Ricolo D, Castro-Ribera J, Araújo SJ. Cytoskeletal players in single-cell branching morphogenesis. Dev Biol 2021; 477:22-34. [PMID: 34004181 DOI: 10.1016/j.ydbio.2021.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/25/2021] [Accepted: 05/04/2021] [Indexed: 12/22/2022]
Abstract
Branching networks are a very common feature of multicellular animals and underlie the formation and function of numerous organs including the nervous system, the respiratory system, the vasculature and many internal glands. These networks range from subcellular structures such as dendritic trees to large multicellular tissues such as the lungs. The production of branched structures by single cells, so called subcellular branching, which has been better described in neurons and in cells of the respiratory and vascular systems, involves complex cytoskeletal remodelling events. In Drosophila, tracheal system terminal cells (TCs) and nervous system dendritic arborisation (da) neurons are good model systems for these subcellular branching processes. During development, the generation of subcellular branches by single-cells is characterized by extensive remodelling of the microtubule (MT) network and actin cytoskeleton, followed by vesicular transport and membrane dynamics. In this review, we describe the current knowledge on cytoskeletal regulation of subcellular branching, based on the terminal cells of the Drosophila tracheal system, but drawing parallels with dendritic branching and vertebrate vascular subcellular branching.
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Affiliation(s)
- Delia Ricolo
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, 08028, Barcelona, Spain; Institute of Biomedicine University of Barcelona (IBUB), Barcelona, Spain
| | - Judith Castro-Ribera
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, 08028, Barcelona, Spain; Institute of Biomedicine University of Barcelona (IBUB), Barcelona, Spain
| | - Sofia J Araújo
- Department of Genetics, Microbiology and Statistics, School of Biology, University of Barcelona, 08028, Barcelona, Spain; Institute of Biomedicine University of Barcelona (IBUB), Barcelona, Spain.
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14
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Wang C, Dai X, Wu S, Xu W, Song P, Huang K, Zou MH. FUNDC1-dependent mitochondria-associated endoplasmic reticulum membranes are involved in angiogenesis and neoangiogenesis. Nat Commun 2021; 12:2616. [PMID: 33972548 PMCID: PMC8110587 DOI: 10.1038/s41467-021-22771-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 03/23/2021] [Indexed: 01/22/2023] Open
Abstract
FUN14 domain-containing protein 1 (FUNDC1) is an integral mitochondrial outer-membrane protein, and mediates the formation of mitochondria-associated endoplasmic reticulum membranes (MAMs). This study aims to determine the contributions of FUNDC1-mediated MAMs to angiogenesis in vitro and in vivo. In cultured endothelial cells, VEGF significantly increases the formation of MAMs and MAM-related proteins, including FUNDC1. Endothelial cell-specific deletion of FUNDC1, which disrupts MAM formation in endothelial cells, lowers VEGFR2 expression and reduces tube formation, spheroid-sprouting, and functional blood vessel formation in vitro and in vivo. Conversely, increased MAM formation using MAM linkers mimics the effects of VEGF and promotes endothelial angiogenesis. Mechanistically, increased MAMs formation led to increased levels of Ca2+ in cytosol, promoted the phosphorylation of serum response factor (SRF) and enhanced the binding of SRF to VEGFR2 promoter, resulting in increased VEGFR2 production, with consequent angiogenesis. Moreover, blocking FUNDC1-related MAM formation with a cell-penetrating inhibitory peptide significantly suppresses the expressions of downstream angiogenic genes and inhibits tumor angiogenesis. We conclude that decreased MAMs formation by silencing FUNDC1 can inhibit angiogenesis by decreasing VEGFR2 expression, and targeting FUNDC1-dependent MAMs might be a promising approach for treating human disorders characterized by defective angiogenesis.
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Affiliation(s)
- Cheng Wang
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, Georgia, USA.
| | - Xiaoyan Dai
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, Georgia, USA
| | - Shengnan Wu
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, Georgia, USA
| | - Wenjing Xu
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ping Song
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, Georgia, USA
| | - Kai Huang
- Clinic Center of Human Gene Research, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Ming-Hui Zou
- Center for Molecular and Translational Medicine, Georgia State University, Atlanta, Georgia, USA.
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15
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Abstract
In this report, we describe how endothelial cells, the cells lining the interior of blood vessels, invade into tissues to form new vessels through sprouting angiogenesis. We found that endothelial cells use a specific lamellipodia-related membrane protrusion for invasion, which we termed dactylopodia. These protrusions have a special morphology, originate from filopodia, are linked to membrane-ruffling activity, and are specialized in invading into avascular extracellular matrix. Our work lays the foundations for drug discovery targeting sprouting angiogenesis. Sprouting angiogenesis is fundamental for development and contributes to cancer, diabetic retinopathy, and cardiovascular diseases. Sprouting angiogenesis depends on the invasive properties of endothelial tip cells. However, there is very limited knowledge on how tip cells invade into tissues. Here, we show that endothelial tip cells use dactylopodia as the main cellular protrusion for invasion into nonvascular extracellular matrix. We show that dactylopodia and filopodia protrusions are balanced by myosin IIA (NMIIA) and actin-related protein 2/3 (Arp2/3) activity. Endothelial cell-autonomous ablation of NMIIA promotes excessive dactylopodia formation in detriment of filopodia. Conversely, endothelial cell-autonomous ablation of Arp2/3 prevents dactylopodia development and leads to excessive filopodia formation. We further show that NMIIA inhibits Rac1-dependent activation of Arp2/3 by regulating the maturation state of focal adhesions. Our discoveries establish a comprehensive model of how endothelial tip cells regulate its protrusive activity and will pave the way toward strategies to block invasive tip cells during sprouting angiogenesis.
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16
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Fonseca CG, Barbacena P, Franco CA. Endothelial cells on the move: dynamics in vascular morphogenesis and disease. VASCULAR BIOLOGY 2020; 2:H29-H43. [PMID: 32935077 PMCID: PMC7487603 DOI: 10.1530/vb-20-0007] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 07/02/2020] [Indexed: 12/11/2022]
Abstract
The vascular system is a hierarchically organized network of blood vessels that play crucial roles in embryogenesis, homeostasis and disease. Blood vessels are built by endothelial cells – the cells lining the interior of blood vessels – through a process named vascular morphogenesis. Endothelial cells react to different biomechanical signals in their environment by adjusting their behavior to: (1) invade, proliferate and fuse to form new vessels (angiogenesis); (2) remodel, regress and establish a hierarchy in the network (patterning); and (3) maintain network stability (quiescence). Each step involves the coordination of endothelial cell differentiation, proliferation, polarity, migration, rearrangements and shape changes to ensure network integrity and an efficient barrier between blood and tissues. In this review, we highlighted the relevance and the mechanisms involving endothelial cell migration during different steps of vascular morphogenesis. We further present evidence on how impaired endothelial cell dynamics can contribute to pathology.
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Affiliation(s)
- Catarina G Fonseca
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.,Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Pedro Barbacena
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Claudio A Franco
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal.,Instituto de Histologia e Biologia do Desenvolvimento, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
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17
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Budi EH, Mamai O, Hoffman S, Akhurst RJ, Derynck R. Enhanced TGF-β Signaling Contributes to the Insulin-Induced Angiogenic Responses of Endothelial Cells. iScience 2019; 11:474-491. [PMID: 30684493 PMCID: PMC6348203 DOI: 10.1016/j.isci.2018.12.038] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 11/12/2018] [Accepted: 12/28/2018] [Indexed: 12/17/2022] Open
Abstract
Angiogenesis, the development of new blood vessels, is a key process in disease. We reported that insulin promotes translocation of transforming growth factor β (TGF-β) receptors to the plasma membrane of epithelial and fibroblast cells, thus enhancing TGF-β responsiveness. Since insulin promotes angiogenesis, we addressed whether increased autocrine TGF-β signaling participates in endothelial cell responses to insulin. We show that insulin enhances TGF-β responsiveness and autocrine TGF-β signaling in primary human endothelial cells, by inducing a rapid increase in cell surface TGF-β receptor levels. Autocrine TGF-β/Smad signaling contributed substantially to insulin-induced gene expression associated with angiogenesis, including TGF-β target genes encoding angiogenic mediators; was essential for endothelial cell migration; and participated in endothelial cell invasion and network formation. Blocking TGF-β signaling impaired insulin-induced microvessel outgrowth from neonatal aortic rings and modified insulin-stimulated blood vessel formation in zebrafish. We conclude that enhanced autocrine TGF-β signaling is integral to endothelial cell and angiogenic responses to insulin.
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Affiliation(s)
- Erine H Budi
- Department of Cell and Tissue Biology, University of California at San Francisco Broad Center, Room RMB-1027, 35 Medical Center Way, San Francisco, CA 94143-0669, USA; Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California at San Francisco, San Francisco, CA 94143, USA
| | - Ons Mamai
- Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA 94143, USA
| | - Steven Hoffman
- Department of Cell and Tissue Biology, University of California at San Francisco Broad Center, Room RMB-1027, 35 Medical Center Way, San Francisco, CA 94143-0669, USA; Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California at San Francisco, San Francisco, CA 94143, USA
| | - Rosemary J Akhurst
- Department of Anatomy, University of California at San Francisco, San Francisco, CA 94143, USA; Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California at San Francisco, San Francisco, CA 94143, USA; Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA 94143, USA
| | - Rik Derynck
- Department of Cell and Tissue Biology, University of California at San Francisco Broad Center, Room RMB-1027, 35 Medical Center Way, San Francisco, CA 94143-0669, USA; Department of Anatomy, University of California at San Francisco, San Francisco, CA 94143, USA; Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California at San Francisco, San Francisco, CA 94143, USA; Helen Diller Family Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA 94143, USA.
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18
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Gau D, Roy P. SRF'ing and SAP'ing - the role of MRTF proteins in cell migration. J Cell Sci 2018; 131:131/19/jcs218222. [PMID: 30309957 DOI: 10.1242/jcs.218222] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Actin-based cell migration is a fundamental cellular activity that plays a crucial role in a wide range of physiological and pathological processes. An essential feature of the remodeling of actin cytoskeleton during cell motility is the de novo synthesis of factors involved in the regulation of the actin cytoskeleton and cell adhesion in response to growth-factor signaling, and this aspect of cell migration is critically regulated by serum-response factor (SRF)-mediated gene transcription. Myocardin-related transcription factors (MRTFs) are key coactivators of SRF that link actin dynamics to SRF-mediated gene transcription. In this Review, we provide a comprehensive overview of the role of MRTF in both normal and cancer cell migration by discussing its canonical SRF-dependent as well as its recently emerged SRF-independent functions, exerted through its SAP domain, in the context of cell migration. We conclude by highlighting outstanding questions for future research in this field.
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Affiliation(s)
- David Gau
- Department of Bioengineering, University of Pittsburgh, PA 15213, USA
| | - Partha Roy
- Department of Bioengineering, University of Pittsburgh, PA 15213, USA .,Department of Pathology, University of Pittsburgh, PA, 15213, USA
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19
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Gegenfurtner FA, Jahn B, Wagner H, Ziegenhain C, Enard W, Geistlinger L, Rädler JO, Vollmar AM, Zahler S. Micropatterning as a tool to identify regulatory triggers and kinetics of actin-mediated endothelial mechanosensing. J Cell Sci 2018; 131:jcs.212886. [PMID: 29724912 DOI: 10.1242/jcs.212886] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 04/25/2018] [Indexed: 12/11/2022] Open
Abstract
Developmental processes, such as angiogenesis, are associated with a constant remodeling of the actin cytoskeleton in response to different mechanical stimuli. The mechanosensitive transcription factors MRTF-A (MKL1) and YAP (also known as YAP1) are important mediators of this challenging adaptation process. However, it is as yet unknown whether both pathways respond in an identical or in a divergent manner to a given microenvironmental guidance cue. Here, we use a micropatterning approach to dissect single aspects of cellular behavior in a spatiotemporally controllable setting. Using the exemplary process of angiogenesis, we show that cell-cell contacts and adhesive surface area are shared regulatory parameters of MRTF and YAP on rigid 2D surfaces. By analyzing MRTF and YAP under laminar flow conditions and during cell migration on dumbbell-shaped microstructures, we demonstrate that they exhibit different translocation kinetics. In conclusion, our work promotes the application of micropatterning techniques as a cell biological tool to study mechanosensitive signaling in the context of angiogenesis.
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Affiliation(s)
- Florian A Gegenfurtner
- Ludwig-Maximilians-University Munich, Department of Pharmacy, Center for Drug Research, 81377 Munich, Germany
| | - Berenice Jahn
- Ludwig-Maximilians-University Munich, Department of Pharmacy, Center for Drug Research, 81377 Munich, Germany
| | - Helga Wagner
- ibidi GmbH, Am Klopferspitz 19, 82152 Martinsried, Germany
| | - Christoph Ziegenhain
- Ludwig-Maximilians-University Munich, Department of Biology II, Anthropology and Human Genomics, 82152 Martinsried, Germany
| | - Wolfgang Enard
- Ludwig-Maximilians-University Munich, Department of Biology II, Anthropology and Human Genomics, 82152 Martinsried, Germany
| | - Ludwig Geistlinger
- Ludwig-Maximilians-University Munich, Institute for Informatics, Teaching and Research Unit Bioinformatics, 80333 Munich, Germany
| | - Joachim O Rädler
- Ludwig-Maximilians-University Munich, Faculty of Physics, Soft Condensed Matter Group, 80539 Munich, Germany
| | - Angelika M Vollmar
- Ludwig-Maximilians-University Munich, Department of Pharmacy, Center for Drug Research, 81377 Munich, Germany
| | - Stefan Zahler
- Ludwig-Maximilians-University Munich, Department of Pharmacy, Center for Drug Research, 81377 Munich, Germany
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20
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Visualization of Proliferative Vascular Endothelial Cells in Tumors in Vivo by Imaging Their Partner of Sld5-1 Promoter Activity. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 188:1300-1314. [DOI: 10.1016/j.ajpath.2018.01.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 12/18/2017] [Accepted: 01/23/2018] [Indexed: 02/06/2023]
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21
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Kim J, Kim YH, Kim J, Park DY, Bae H, Lee DH, Kim KH, Hong SP, Jang SP, Kubota Y, Kwon YG, Lim DS, Koh GY. YAP/TAZ regulates sprouting angiogenesis and vascular barrier maturation. J Clin Invest 2017; 127:3441-3461. [PMID: 28805663 DOI: 10.1172/jci93825] [Citation(s) in RCA: 264] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 06/29/2017] [Indexed: 12/28/2022] Open
Abstract
Angiogenesis is a multistep process that requires coordinated migration, proliferation, and junction formation of vascular endothelial cells (ECs) to form new vessel branches in response to growth stimuli. Major intracellular signaling pathways that regulate angiogenesis have been well elucidated, but key transcriptional regulators that mediate these signaling pathways and control EC behaviors are only beginning to be understood. Here, we show that YAP/TAZ, a transcriptional coactivator that acts as an end effector of Hippo signaling, is critical for sprouting angiogenesis and vascular barrier formation and maturation. In mice, endothelial-specific deletion of Yap/Taz led to blunted-end, aneurysm-like tip ECs with fewer and dysmorphic filopodia at the vascular front, a hyper-pruned vascular network, reduced and disarranged distributions of tight and adherens junction proteins, disrupted barrier integrity, subsequent hemorrhage in growing retina and brain vessels, and reduced pathological choroidal neovascularization. Mechanistically, YAP/TAZ activates actin cytoskeleton remodeling, an important component of filopodia formation and junction assembly. Moreover, YAP/TAZ coordinates EC proliferation and metabolic activity by upregulating MYC signaling. Overall, these results show that YAP/TAZ plays multifaceted roles for EC behaviors, proliferation, junction assembly, and metabolism in sprouting angiogenesis and barrier formation and maturation and could be a potential therapeutic target for treating neovascular diseases.
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Affiliation(s)
- Jongshin Kim
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea
| | - Yoo Hyung Kim
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
| | - Jaeryung Kim
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
| | - Do Young Park
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
| | - Hosung Bae
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
| | - Da-Hye Lee
- National Creative Research Initiatives Center for Cell Division and Differentiation, Department of Biological Science, KAIST, Daejeon, South Korea
| | - Kyun Hoo Kim
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
| | - Seon Pyo Hong
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
| | - Seung Pil Jang
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
| | - Yoshiaki Kubota
- Department of Vascular Biology, The Sakaguchi Laboratory, Keio University School of Medicine, Tokyo, Japan
| | - Young-Guen Kwon
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul, South Korea
| | - Dae-Sik Lim
- National Creative Research Initiatives Center for Cell Division and Differentiation, Department of Biological Science, KAIST, Daejeon, South Korea
| | - Gou Young Koh
- Center for Vascular Research, Institute for Basic Science, Daejeon, South Korea.,Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea
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22
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Menendez MT, Ong EC, Shepherd BT, Muthukumar V, Silasi-Mansat R, Lupu F, Griffin CT. BRG1 (Brahma-Related Gene 1) Promotes Endothelial Mrtf Transcription to Establish Embryonic Capillary Integrity. Arterioscler Thromb Vasc Biol 2017; 37:1674-1682. [PMID: 28729363 DOI: 10.1161/atvbaha.117.309785] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 07/10/2017] [Indexed: 01/23/2023]
Abstract
OBJECTIVE The chromatin remodeling enzyme BRG1 (brahma-related gene 1) transcriptionally regulates target genes important for early blood vessel development and primitive hematopoiesis. However, because Brg1 deletion in vascular progenitor cells results in lethal anemia by embryonic day 10.5 (E10.5), roles for BRG1 in embryonic vascular development after midgestation are unknown. In this study, we sought to determine whether endothelial cell BRG1 regulates genes important for vascular development or maintenance later in embryonic development. APPROACH AND RESULTS Using mice with temporally inducible deletion of endothelial BRG1 (Brg1fl/fl;Cdh5(PAC)-CreERT2 ), we found that Brg1 excision between E9.5 and 11.5 results in capillary dilation and lethal hemorrhage by E14.5. This phenotype strongly resembles that seen when the SRF (serum response factor) transcription factor is deleted from embryonic endothelial cells. Although expression of Srf and several of its known endothelial cell target genes are downregulated in BRG1-depleted endothelial cells, we did not detect binding of BRG1 at these gene promoters, indicating that they are not direct BRG1 target genes. Instead, we found that BRG1 binds to the promoters of the SRF cofactors Mrtfa and Mrtfb (myocardin-related transcription factors A and B) in endothelial cells, and these genes are downregulated in Brg1-deficient endothelial cells. CONCLUSIONS BRG1 promotes transcription of endothelial Mrtfa and Mrtfb, which elevates expression of SRF and SRF target genes that establish embryonic capillary integrity. These data highlight a new and temporally specific role for BRG1 in embryonic vasculature and provide novel information about epigenetic regulation of Mrtf expression and SRF signaling in developing blood vessels.
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Affiliation(s)
- Matthew T Menendez
- From the Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City (M.T.M., E.-C.O., B.T.S, V.M., R.S.-M., F.L., C.T.G.); and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City (F.L., C.T.G.)
| | - E-Ching Ong
- From the Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City (M.T.M., E.-C.O., B.T.S, V.M., R.S.-M., F.L., C.T.G.); and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City (F.L., C.T.G.)
| | - Brian T Shepherd
- From the Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City (M.T.M., E.-C.O., B.T.S, V.M., R.S.-M., F.L., C.T.G.); and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City (F.L., C.T.G.)
| | - Vijay Muthukumar
- From the Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City (M.T.M., E.-C.O., B.T.S, V.M., R.S.-M., F.L., C.T.G.); and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City (F.L., C.T.G.)
| | - Robert Silasi-Mansat
- From the Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City (M.T.M., E.-C.O., B.T.S, V.M., R.S.-M., F.L., C.T.G.); and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City (F.L., C.T.G.)
| | - Florea Lupu
- From the Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City (M.T.M., E.-C.O., B.T.S, V.M., R.S.-M., F.L., C.T.G.); and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City (F.L., C.T.G.)
| | - Courtney T Griffin
- From the Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City (M.T.M., E.-C.O., B.T.S, V.M., R.S.-M., F.L., C.T.G.); and Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City (F.L., C.T.G.).
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23
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Castaneda Vega S, Weinl C, Calaminus C, Wang L, Harant M, Ehrlichmann W, Thiele D, Kohlhofer U, Reischl G, Hempel JM, Ernemann U, Quintanilla Martinez L, Nordheim A, Pichler BJ. Characterization of a novel murine model for spontaneous hemorrhagic stroke using in vivo PET and MR multiparametric imaging. Neuroimage 2017; 155:245-256. [DOI: 10.1016/j.neuroimage.2017.04.071] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 03/29/2017] [Accepted: 04/29/2017] [Indexed: 01/07/2023] Open
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24
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Pharmacological intervention of MKL/SRF signaling by CCG-1423 impedes endothelial cell migration and angiogenesis. Angiogenesis 2017. [PMID: 28638990 DOI: 10.1007/s10456-017-9560-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
De novo synthesis of cytoskeleton-regulatory proteins triggered by the megakaryoblastic leukemia (MKL)/serum response factor (SRF) transcriptional system in response to pro-angiogenic growth factors lies at the heart of endothelial cell (EC) migration (a critical element of angiogenesis) and neovascularization. This study explores whether pharmacological intervention of MKL/SRF signaling axis by CCG-1423 is able to suppress angiogenesis. Our studies show that CCG-1423 inhibits migration and cord morphogenesis of EC in vitro and sprouting angiogenesis ex vivo and in vivo, suggesting CCG-1423 could be a novel anti-angiogenic agent. Kymography analyses of membrane dynamics of EC revealed that CCG-1423 treatment causes a major defect in membrane protrusion. CCG-1423 treatment led to attenuated expression of several actin-binding proteins that are important for driving membrane protrusion including ArpC2, VASP, and profilin1 (Pfn1) with the most drastic effect seen on the expression of Pfn1. Finally, depletion of Pfn1 alone is also sufficient for a dramatic decrease in sprouting angiogenesis of EC in vitro and ex vivo, further suggesting that Pfn1 depletion may be one of the mechanisms of the anti-angiogenic action of CCG-1423.
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25
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Tobin SW, Li SH, Li J, Wu J, Yeganeh A, Yu P, Weisel RD, Li RK. Dual roles for bone marrow-derived Sca-1 cells in cardiac function. FASEB J 2017; 31:2905-2915. [PMID: 28336524 DOI: 10.1096/fj.201601363rr] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/06/2017] [Indexed: 01/04/2023]
Abstract
Recruitment of stem cells from the bone marrow (BM) is an important aspect of cardiac healing that becomes inefficient with age. We investigated the role of young stem cell antigen 1 (Sca-1)-positive BM cells on the aged heart by microarray analysis after BM reconstitution. Sca-1+ and Sca-1- BM cells from young green fluorescent protein (GFP)-positive mice were used to reconstitute the BM of aged mice. Myocardial infarction (MI) was induced 3 mo later. GFP+ cells were more abundant in the BM, blood, and heart of Sca-1+ mice, which corresponded to preserved cardiac function after MI. At baseline, Sca-1+ BM reconstitution increased cardiac expression of serum response factor, vascular endothelial growth factor A, and myogenic genes, but reduced the expression of Il-1β. After MI, inflammation was identified as a key difference between Sca-1- and Sca-1+ groups, as cytokine expression and cell surface markers associated with inflammatory cells were up-regulated with Sca-1+ reconstitution. Mac-3 and F4/80 staining showed that the postinfarction heart was composed of a mixture of GFP+ (donor) macrophages, GFP- (host) macrophages, and GFP+ cells that did not contribute to the macrophage population. This study demonstrates that Sca-1+ BM cells regulate cardiac healing though an acute inflammatory response and also before injury by stimulating formation of a beneficial cardiac niche.-Tobin, S. W., Li, S.-H., Li, J., Wu, J., Yeganeh, A., Yu, P., Weisel, R. D., Li, R.-K. Dual roles for bone marrow-derived Sca-1 cells in cardiac function.
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Affiliation(s)
- Stephanie W Tobin
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Shu-Hong Li
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Jiao Li
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada.,Department of Cardiology, Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jun Wu
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Azadeh Yeganeh
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Pan Yu
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
| | - Richard D Weisel
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada.,Division of Cardiac Surgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Ren-Ke Li
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada; .,Division of Cardiac Surgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
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26
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Wu C, Guo S, Niu Y, Yang L, Liu B, Jiang N, Su M, Wang L. Heat-shock protein 60 of Porphyromonas gingivalis may induce dysfunction of human umbilical endothelial cells via regulation of endothelial-nitric oxide synthase and vascular endothelial-cadherin. Biomed Rep 2016; 5:243-247. [PMID: 27446550 PMCID: PMC4950585 DOI: 10.3892/br.2016.693] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 04/27/2016] [Indexed: 11/06/2022] Open
Abstract
Accumulating evidence has established that periodontitis was an independent risk factor for coronary heart disease (CAD). Porphyromonus gingivalis (P. gingivalis), a major periodontal pathogen, has already been shown to have a significant role in the inflammatory response of CAD in vivo. The aim of the present study was to identify whether P. gingivalis heat-shock protein 60 (HSP60) induced the dysfunction of human umbilical vein endothelial cells (HUVECs) in vitro. HUVECs were stimulated with a range of P. gingivalis HSP60 concentrations (1, 10 and 100 ng/l) at different time-points. The levels of vascular endothelial (VE)-cadherin, endothelial nitric oxide synthase (eNOS) and cysteinyl aspartate-specific protease-3 (caspase-3) were measured using western blot analysis. The apoptotic rate of HUVECs was detected using flow cytometry. P. gingivalis HSP60 at a concentration of 10 ng/l significantly decreased the expression levels of VE-cadherin and eNOS protein at 24 h stimulation, whereas no difference in these proteins was identified following a low dose of P. gingivalis HSP60 (1 ng/l). P. gingivalis HSP60 at 100 ng/l significantly downregulated the expression levels of VE-cadherin and eNOS protein at 12 h in HUVECs. However, the cleavage of caspase-3 showed an opposing change at different concentrations. Consistently, P. gingivalis HSP60 induced apoptosis of HUVECs in a concentration-dependent manner. These results indicated that P. gingivalis HSP60 may induce dysfunction and apoptosis in HUVECs via downregulating the expression levels of VE-cadherin and eNOS, and promoting the cleavage of caspase-3.
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Affiliation(s)
- Cunjin Wu
- Department of Geratology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Shijie Guo
- Department of Geratology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Yuanjie Niu
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Limin Yang
- Department of Geratology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Bainian Liu
- Department of Geratology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Ning Jiang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Ming Su
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, P.R. China
| | - Lin Wang
- Department of Geratology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
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27
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Coletti D, Daou N, Hassani M, Li Z, Parlakian A. Serum Response Factor in Muscle Tissues: From Development to Ageing. Eur J Transl Myol 2016; 26:6008. [PMID: 27478561 PMCID: PMC4942704 DOI: 10.4081/ejtm.2016.6008] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Skeletal, cardiac and smooth muscle cells share various common characteristic features. During development the embryonic mesodermal layer contribute at different proportions to the formation of these tissues. At the functional level, contractility as well as its decline during ageing, are also common features. Cytoskeletal components of these tissues are characterized by various actin isoforms that govern through their status (polymerised versus monomeric) and their interaction with the myosins the contractile properties of these muscles. Finally, at the molecular level, a set of different transcription factors with the notable exception of Serum Response Factor SRF- which is commonly enriched in the 3 types of muscle- drive and maintain the differentiation of these cells (Myf5, MyoD, Myogenin for skeletal muscle; Nkx2.5, GATA4 for cardiomyocytes). In this review, we will focus on the transcription factor SRF and its role in the homeostasis of cardiac, smooth and skeletal muscle tissues as well as its behaviour during the age related remodelling process of these tissues with a specific emphasis on animal models and human data when available.
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Affiliation(s)
- Dario Coletti
- Sorbonne University, UPMC, Department of Biological Adaptation and Ageing, IBPS, UMR 8256 CNRS, INSERM U1164, Paris, France; Dept of Anatomy, Histology, Forensic Medicine & Ortopedics, School of Medicine Sapienza University of Rome, Italy
| | - Nissrine Daou
- Sorbonne University, UPMC , Department of Biological Adaptation and Ageing, IBPS, UMR 8256 CNRS, INSERM U1164, Paris, France
| | - Medhi Hassani
- Sorbonne University, UPMC , Department of Biological Adaptation and Ageing, IBPS, UMR 8256 CNRS, INSERM U1164, Paris, France
| | - Zhenlin Li
- Sorbonne University, UPMC , Department of Biological Adaptation and Ageing, IBPS, UMR 8256 CNRS, INSERM U1164, Paris, France
| | - Ara Parlakian
- Sorbonne University, UPMC , Department of Biological Adaptation and Ageing, IBPS, UMR 8256 CNRS, INSERM U1164, Paris, France
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28
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Park-Windhol C, D'Amore PA. Disorders of Vascular Permeability. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2016; 11:251-81. [PMID: 26907525 DOI: 10.1146/annurev-pathol-012615-044506] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The endothelial barrier maintains vascular and tissue homeostasis and modulates many physiological processes, such as angiogenesis. Vascular barrier integrity can be disrupted by a variety of soluble permeability factors, and changes in barrier function can exacerbate tissue damage during disease progression. Understanding endothelial barrier function is critical for vascular homeostasis. Many of the signaling pathways promoting vascular permeability can also be triggered during disease, resulting in prolonged or uncontrolled vascular leak. It is believed that recovery of the normal vasculature requires diminishing this hyperpermeable state. Although the molecular mechanisms governing vascular leak have been studied over the last few decades, recent advances have identified new therapeutic targets that have begun to show preclinical and clinical promise. These approaches have been successfully applied to an increasing number of disease conditions. New perspectives regarding how vascular leak impacts the progression of various diseases are highlighted in this review.
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Affiliation(s)
- Cindy Park-Windhol
- Schepens Eye Research Institute, Massachusetts Eye and Ear, Boston, Massachusetts 02114; , .,Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts 02115
| | - Patricia A D'Amore
- Schepens Eye Research Institute, Massachusetts Eye and Ear, Boston, Massachusetts 02114; , .,Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts 02115.,Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115
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29
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Kong L, Hu N, Du X, Wang W, Chen H, Li W, Wei S, Zhuang H, Li X, Li C. Upregulation of miR-483-3p contributes to endothelial progenitor cells dysfunction in deep vein thrombosis patients via SRF. J Transl Med 2016; 14:23. [PMID: 26801758 PMCID: PMC4724160 DOI: 10.1186/s12967-016-0775-2] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 01/06/2016] [Indexed: 12/20/2022] Open
Abstract
Background Endothelial progenitor cells (EPCs) contribute to recanalization of deep vein thrombosis (DVT). This study aimed to detect miRNA expression profiles in EPCs from patients with DVT and characterize the role of miRNA in EPCs dysfunction. Methods EPCs was isolated from DVT patients and control subjects, and miRNA expression profiles were compared to screen differential miRNAs. The candidate miRNAs were confirmed by RT-PCR analysis. The targets of miRNA were identified by bioinformatics analyses, luciferase reporter assay and gene expression analyses. The apoptosis, migration and tube formation of EPCs were examined by flow cytometry, transwell assay and matrigel tube formation assay. A rat model of venous thrombosis was established as in vivo model. Results We identified miR-483-3p as a candidate miRNA upregulated in EPCs from DVT patients. By using miR-483-3p agomir and antagomir, we demonstrated that miR-483-3p decreased the migration and tube formation while increased the apoptosis of EPCs. Moreover, we identified serum response factor (SRF) as the target of miR-483-3p, and showed that SRF knockdown decreased the migration and tube formation while increased the apoptosis of EPCs. In addition, miR-483-3p inhibition led to enhanced ability of homing and thrombus resolution of EPCs in rat model of venous thrombosis. Conclusions miR-483-3p is upregulated in EPCs from DVT patients, and it targets SRF to decrease EPCs migration and tube formation and increase apoptosis in vitro, while decrease EPCs homing and thrombus resolution in vivo. MiR-483-3p is a potential therapeutic target in DVT treatment. Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-0775-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lingshang Kong
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Nan Hu
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Xiaolong Du
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Wenbin Wang
- Department of General Surgery, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.
| | - Hong Chen
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Wendong Li
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Sen Wei
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Hao Zhuang
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Xiaoqiang Li
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
| | - Chenglong Li
- Department of Vascular Surgery, The Second Affiliated Hospital of Soochow University, No.1055, Sanxiang Rd, Suzhou, 215000, Jiangsu, China.
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30
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Ye X, Qian Y, Wang Q, Yuan W, Mo X, Li Y, Jiang Z, Xu W, Deng Y, Wan Y, Fan X, Wu X, Wang Y. SMYD1, an SRF-Interacting Partner, Is Involved in Angiogenesis. PLoS One 2016; 11:e0146468. [PMID: 26799706 PMCID: PMC4723226 DOI: 10.1371/journal.pone.0146468] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 12/17/2015] [Indexed: 11/18/2022] Open
Abstract
Previous studies have demonstrated that Smyd1 plays a critical role in cardiomyocyte differentiation, cardiac morphogenesis and myofibril organization. In this study, we uncovered a novel function of Smyd1 in the regulation of endothelial cells (ECs). Our data showed that Smyd1 is expressed in vascular endothelial cells, and knockdown of SMYD1 in endothelial cells impairs EC migration and tube formation. Furthermore, Co-IP and GST pull-down assays demonstrated that SMYD1 is associated with the Serum Response Factor (SRF). EMSA assays further showed that SMYD1 forms a complex with SRF and enhances SRF DNA binding activity. Our studies indicate that SMYD1 serves as an SRF-interacting protein, enhances SRF DNA binding activity, and is required for EC migration and tube formation to regulate angiogenesis.
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Affiliation(s)
- Xiangli Ye
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
- College of Medicine, Hunan Normal University, Changsha, Hunan, 410013, China
| | - Yu Qian
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Qian Wang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Wuzhou Yuan
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Xiaoyang Mo
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Yongqing Li
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Zhigang Jiang
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Wei Xu
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Yun Deng
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Yongqi Wan
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
| | - Xiongwei Fan
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
- * E-mail: (XF); (XW); (Y. Wang)
| | - Xiushan Wu
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
- * E-mail: (XF); (XW); (Y. Wang)
| | - Yuequn Wang
- The Center for Heart Development, Key Lab of MOE for Development Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, 410081, Hunan, China
- * E-mail: (XF); (XW); (Y. Wang)
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Shao X, Liu K, Fan Y, Ding Z, Chen M, Zhu M, Weinstein LS, Li H, Li H. Gαs Relays Sphingosine-1-Phosphate Receptor 1 Signaling to Stabilize Vascular Endothelial-Cadherin at Endothelial Junctions to Control Mouse Embryonic Vascular Integrity. J Genet Genomics 2015; 42:613-624. [PMID: 26674379 DOI: 10.1016/j.jgg.2015.08.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 08/02/2015] [Accepted: 08/03/2015] [Indexed: 02/05/2023]
Abstract
Sphingosine-1-phosphate receptor 1 (S1PR1), a G protein-coupled receptor (GPCR), controls vascular stability by stabilizing vascular endothelial (VE)-cadherin junctional localization and inhibiting vascular endothelial growth factor receptor 2 (VEGFR2) signaling. However, the molecular mechanisms that link S1PR1 signaling to intracellular effectors remain unknown. In this study, we demonstrate that the heterotrimeric G protein subfamily member Gαs, encoded by GNAS, acts as a relay mediator of S1PR1 signaling to control vascular integrity by stabilizing VE-cadherin at endothelial junctions. The endothelial cell-specific deletion of Gαs in mice causes early embryonic lethality with massive hemorrhage and a disorganized vasculature. The immunostaining results revealed that Gαs deletion remarkably reduces the junctional localization of VE-cadherin, whereas the mural cell coverage of the vessels is not impaired. In addition, we found that Gαs depletion blocks the S1PR1-activation induced VE-cadherin stabilization at junctions, supporting that Gαs acts downstream of S1PR1 signaling. Thus, our results demonstrate that Gαs is an essential mediator to relay S1PR1 signaling and maintain vascular integrity.
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Affiliation(s)
- Ximing Shao
- West China Developmental and Stem Cell Institute, West China Second Hospital, Sichuan University, Chengdu 610041, China; State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; Shenzhen Key Laboratory for Molecular Biology of Neural Development, Laboratory of Developmental and Regenerative Biology, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Ke Liu
- West China Developmental and Stem Cell Institute, West China Second Hospital, Sichuan University, Chengdu 610041, China; State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; Shenzhen Key Laboratory for Molecular Biology of Neural Development, Laboratory of Developmental and Regenerative Biology, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Yi Fan
- West China Developmental and Stem Cell Institute, West China Second Hospital, Sichuan University, Chengdu 610041, China; State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China
| | - Zhihao Ding
- Shenzhen Key Laboratory for Molecular Biology of Neural Development, Laboratory of Developmental and Regenerative Biology, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Min Chen
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Minyan Zhu
- SARITEX Center for Stem Cell Engineering Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China
| | - Lee S Weinstein
- National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Hongchang Li
- Shenzhen Key Laboratory for Molecular Biology of Neural Development, Laboratory of Developmental and Regenerative Biology, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Huashun Li
- West China Developmental and Stem Cell Institute, West China Second Hospital, Sichuan University, Chengdu 610041, China; State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; SARITEX Center for Stem Cell Engineering Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200123, China; Nerdbio Inc., SIP Biobay, Suzhou 215213, China.
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32
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Bernabeu MO, Jones ML, Nielsen JH, Krüger T, Nash RW, Groen D, Schmieschek S, Hetherington J, Gerhardt H, Franco CA, Coveney PV. Computer simulations reveal complex distribution of haemodynamic forces in a mouse retina model of angiogenesis. J R Soc Interface 2015; 11:rsif.2014.0543. [PMID: 25079871 PMCID: PMC4233731 DOI: 10.1098/rsif.2014.0543] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
There is currently limited understanding of the role played by haemodynamic forces on the processes governing vascular development. One of many obstacles to be overcome is being able to measure those forces, at the required resolution level, on vessels only a few micrometres thick. In this paper, we present an in silico method for the computation of the haemodynamic forces experienced by murine retinal vasculature (a widely used vascular development animal model) beyond what is measurable experimentally. Our results show that it is possible to reconstruct high-resolution three-dimensional geometrical models directly from samples of retinal vasculature and that the lattice-Boltzmann algorithm can be used to obtain accurate estimates of the haemodynamics in these domains. We generate flow models from samples obtained at postnatal days (P) 5 and 6. Our simulations show important differences between the flow patterns recovered in both cases, including observations of regression occurring in areas where wall shear stress (WSS) gradients exist. We propose two possible mechanisms to account for the observed increase in velocity and WSS between P5 and P6: (i) the measured reduction in typical vessel diameter between both time points and (ii) the reduction in network density triggered by the pruning process. The methodology developed herein is applicable to other biomedical domains where microvasculature can be imaged but experimental flow measurements are unavailable or difficult to obtain.
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Affiliation(s)
- Miguel O Bernabeu
- CoMPLEX, University College London, Physics Building, Gower St., London WC1E 6BT, UK Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK
| | - Martin L Jones
- Vascular Biology Laboratory, London Research Institute, Cancer Research UK, Lincoln's Inn Laboratories, 44 Lincoln's Inn Fields, London WC2A 3LY, UK
| | - Jens H Nielsen
- Research Software Development Team, Research Computing and Facilitating Services, University College London, Podium Building-1st Floor, Gower St., London WC1E 6BT, UK
| | - Timm Krüger
- Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK Institute for Materials and Processes, School of Engineering, University of Edinburgh, King's Buildings, Mayfield Road, Edinburgh EH9 3JL, UK
| | - Rupert W Nash
- Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK
| | - Derek Groen
- Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK
| | - Sebastian Schmieschek
- Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK
| | - James Hetherington
- Research Software Development Team, Research Computing and Facilitating Services, University College London, Podium Building-1st Floor, Gower St., London WC1E 6BT, UK
| | - Holger Gerhardt
- Vascular Biology Laboratory, London Research Institute, Cancer Research UK, Lincoln's Inn Laboratories, 44 Lincoln's Inn Fields, London WC2A 3LY, UK
| | - Claudio A Franco
- Vascular Biology Laboratory, London Research Institute, Cancer Research UK, Lincoln's Inn Laboratories, 44 Lincoln's Inn Fields, London WC2A 3LY, UK Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisboa 1649-028, Portugal
| | - Peter V Coveney
- Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK
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Abstract
Intracerebral hemorrhagic stroke and vascular dementia are age- and hypertension-associated manifestations of human cerebral small vessel disease (SVD). Cerebral microvessels are formed by endothelial cells (ECs), which are connected through tight junctions, adherens junctions, and stabilizing basement membrane structures. These endothelial connections ensure both vessel stability and blood-brain barrier (BBB) functions, the latter enabling selective exchange of ions, bioactive molecules, and cells between the bloodstream and brain tissue. Srf(iECKO) mice, permitting conditional EC-specific depletion of the transcription factor Serum Response Factor (SRF), suffer from loss of BBB integrity and intracerebral hemorrhaging. Cerebral microbleeds and larger hemorrhages developed upon postnatal and adult depletion of either SRF or its cofactors Myocardin Related Transcription Factor (MRTF-A/-B), revealing essential requirements of ongoing SRF/MRTF activity for maintenance of cerebral small vessel integrity. In vivo magnetic resonance imaging allowed detection, localization, and time-resolved quantification of BBB permeability and hemorrhage formation in Srf(iECKO) brains. At the molecular level, direct and indirect SRF/MRTF target genes, encoding structural components of tight junctions (Claudins and ZO proteins), adherens junctions (VE-cadherin, α-Actinin), and the basement membrane (Collagen IV), were down-regulated upon SRF depletion. These results identify SRF and its MRTF cofactors as major transcriptional regulators of EC junctional stability, guaranteeing physiological functions of the cerebral microvasculature. We hypothesize that impairments in SRF/MRTF activity contribute to human SVD pathology.
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Liao XH, Wang N, Zhao DW, Zheng DL, Zheng L, Xing WJ, Ma WJ, Bao LY, Dong J, Zhang TC. STAT3 Protein Regulates Vascular Smooth Muscle Cell Phenotypic Switch by Interaction with Myocardin. J Biol Chem 2015; 290:19641-52. [PMID: 26100622 DOI: 10.1074/jbc.m114.630111] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Indexed: 11/06/2022] Open
Abstract
The JAK-STAT3 signaling pathway is one of the critical pathways regulating cell proliferation, differentiation, and apoptosis. Myocardin is regarded as a key mediator for the change of smooth muscle phenotypes. However, the relationship between STAT3 and myocardin in the vascular smooth muscle cell (VSMC) phenotypic switch has not been investigated. The goal of this study was to investigate the molecular mechanism by which STAT3 affects the myocardin-regulated VSMC phenotypic switch. Data presented in this study demonstrated that STAT3 was rapidly up-regulated after stimulation with VEGF. Inhibition of the STAT3 activation process impaired VSMC proliferation and enhanced the expression of VSMC contractile genes by increasing serum-response factor binding to the CArG-containing regions of VSMC-specific contractile genes. In contrast, the interaction between serum-response factor and its co-activator myocardin was reduced by overexpression of STAT3. In addition, treated VEGF inhibited the transcription activity of myocardin, and overexpression of STAT3 inhibited myocardin-induced up-regulation of VSMC contractile phenotype-specific genes. Although myocardin and STAT3 are negatively correlated, interestingly, both of them can enhance the expression of VEGF, suggesting a feedback loop to regulate the VSMC phenotypic switch. Taken together, these results indicate that the JAK-STAT3 signaling pathway plays a key role in controlling the phenotypic switch of VSMCs through the interactions between STAT3 and myocardin by various coordinated gene regulation pathways and feedback loops.
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Affiliation(s)
- Xing-Hua Liao
- From the Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan 430000 and the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Nan Wang
- the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Dong-Wei Zhao
- the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - De-Liang Zheng
- the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Li Zheng
- the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Wen-Jing Xing
- the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Wen-Jian Ma
- the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Le-Yuan Bao
- From the Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan 430000 and
| | - Jian Dong
- From the Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan 430000 and
| | - Tong-Cun Zhang
- From the Institute of Biology and Medicine, Wuhan University of Science and Technology, Wuhan 430000 and the Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
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Abstract
The endothelium forms a selective semi-permeable barrier controlling bidirectional transfer between blood vessel and irrigated tissues. This crucial function relies on the dynamic architecture of endothelial cell–cell junctions, and in particular, VE -cadherin-mediated contacts. VE -cadherin indeed chiefly organizes the opening and closing of the endothelial barrier, and is central in permeability changes. In this review, the way VE -cadherin-based contacts are formed and maintained is first presented, including molecular traits of its expression, partners, and signaling. In a second part, the mechanisms by which VE -cadherin adhesion can be disrupted, leading to cell–cell junction weakening and endothelial permeability increase, are described. Overall, the molecular basis for VE -cadherin control of the endothelial barrier function is of high interest for biomedical research, as vascular leakage is observed in many pathological conditions and human diseases.
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36
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Shu XZ, Zhang LN, Zhang R, Zhang CJ, He HP, Zhou H, Wang N, Zhang TC. Histone acetyltransferase p300 promotes MRTF-A-mediates transactivation of VE-cadherin gene in human umbilical vein endothelial cells. Gene 2015; 563:17-23. [PMID: 25746323 DOI: 10.1016/j.gene.2015.02.076] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/16/2015] [Accepted: 02/27/2015] [Indexed: 11/15/2022]
Abstract
Vascular endothelial cadherin (VE-cadherin) is the major determinant of endothelial cell contact integrity and is required in vascular development and angiogenesis. Serum response factor (SRF) plays essential roles in postnatal retinal angiogenesis and adult neovascularization. It is unclear whether transcription of VE-cadherin is mediated by a SRF co-activator, myocardin-related transcription factor-A (MRTF-A). Here we have demonstrated that MRTF-A is a key regulatory factor to activate the transcription of VE-cadherin in human umbilical vein endothelial cells (HUVECs). siRNA-mediated knockdown of MRTF-A decreased the level of VE-cadherin in HUVECs. Vascular endothelial growth factor (VEGF) induced MRTF-A binding to the SRF-binding site (CArG box) within VE-cadherin promoter. Histone acetyltransferase p300 and MRTF-A could synergistically augment the expression of VE-cadherin by enhancing acetylation of histone3K9 (H3K9Ac), histone3K14 (H3K14Ac) and histone4 at the SRF-binding site within VE-cadherin promoter. Taken together, these data identified a detailed regulatory mechanism of VE-cadherin gene expression.
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Affiliation(s)
- Xiang-Zhu Shu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China
| | - Li-Nan Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China
| | - Rui Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China
| | - Cai-Jiao Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China
| | - Hong-Peng He
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China
| | - Hao Zhou
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China
| | - Nan Wang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China.
| | - Tong-Cun Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, 300457, PR China; Institute of Biology and Medicine, Wuhan University of Science and Technology, 430000, PR China.
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37
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Vasudevan HN, Soriano P. SRF regulates craniofacial development through selective recruitment of MRTF cofactors by PDGF signaling. Dev Cell 2014; 31:332-344. [PMID: 25453829 DOI: 10.1016/j.devcel.2014.10.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 09/02/2014] [Accepted: 10/03/2014] [Indexed: 02/07/2023]
Abstract
Receptor tyrosine kinase signaling is critical for mammalian craniofacial development, but the key downstream transcriptional effectors remain unknown. We demonstrate that serum response factor (SRF) is induced by both platelet-derived growth factor (PDGF) and fibroblast growth factor (FGF) signaling in mouse embryonic palatal mesenchyme cells and that Srf neural crest conditional mutants exhibit facial clefting accompanied by proliferation and migration defects. Srf and Pdgfra mutants interact genetically in craniofacial development, but Srf and Fgfr1 mutants do not. This signal specificity is recapitulated at the level of cofactor activation: while both PDGF and FGF target gene promoters show enriched genome-wide overlap with SRF ChIP-seq peaks, PDGF selectively activates a network of MRTF-dependent cytoskeletal genes. Collectively, our results identify a role for SRF in proliferation and migration during craniofacial development and delineate a mechanism of receptor tyrosine kinase specificity mediated through differential cofactor usage, leading to a PDGF-responsive SRF-driven transcriptional program in the midface.
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Affiliation(s)
- Harish N Vasudevan
- Department of Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Philippe Soriano
- Department of Developmental and Regenerative Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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38
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Abstract
The endothelium forms a selective semi-permeable barrier controlling bidirectional transfer between blood vessel and irrigated tissues. This crucial function relies on the dynamic architecture of endothelial cell-cell junctions, and in particular, VE-cadherin-mediated contacts. VE-cadherin indeed chiefly organizes the opening and closing of the endothelial barrier, and is central in permeability changes. In this review, the way VE-cadherin-based contacts are formed and maintained is first presented, including molecular traits of its expression, partners, and signaling. In a second part, the mechanisms by which VE-cadherin adhesion can be disrupted, leading to cell-cell junction weakening and endothelial permeability increase, are described. Overall, the molecular basis for VE-cadherin control of the endothelial barrier function is of high interest for biomedical research, as vascular leakage is observed in many pathological conditions and human diseases.
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Affiliation(s)
- Julie Gavard
- Cnrs; UMR8104; Paris, France; Inserm; U1016; Paris, France; Universite Paris Descartes; Sorbonne Paris Cite; Paris, France
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39
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Azzi S, Hebda JK, Gavard J. Vascular permeability and drug delivery in cancers. Front Oncol 2013; 3:211. [PMID: 23967403 PMCID: PMC3744053 DOI: 10.3389/fonc.2013.00211] [Citation(s) in RCA: 229] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 08/01/2013] [Indexed: 01/22/2023] Open
Abstract
The endothelial barrier strictly maintains vascular and tissue homeostasis, and therefore modulates many physiological processes such as angiogenesis, immune responses, and dynamic exchanges throughout organs. Consequently, alteration of this finely tuned function may have devastating consequences for the organism. This is particularly obvious in cancers, where a disorganized and leaky blood vessel network irrigates solid tumors. In this context, vascular permeability drives tumor-induced angiogenesis, blood flow disturbances, inflammatory cell infiltration, and tumor cell extravasation. This can directly restrain the efficacy of conventional therapies by limiting intravenous drug delivery. Indeed, for more effective anti-angiogenic therapies, it is now accepted that not only should excessive angiogenesis be alleviated, but also that the tumor vasculature needs to be normalized. Recovery of normal state vasculature requires diminishing hyperpermeability, increasing pericyte coverage, and restoring the basement membrane, to subsequently reduce hypoxia, and interstitial fluid pressure. In this review, we will introduce how vascular permeability accompanies tumor progression and, as a collateral damage, impacts on efficient drug delivery. The molecular mechanisms involved in tumor-driven vascular permeability will next be detailed, with a particular focus on the main factors produced by tumor cells, especially the emblematic vascular endothelial growth factor. Finally, new perspectives in cancer therapy will be presented, centered on the use of anti-permeability factors and normalization agents.
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Affiliation(s)
- Sandy Azzi
- CNRS, UMR8104 , Paris , France ; INSERM, U1016 , Paris , France ; Sorbonne Paris Cite, Universite Paris Descartes , Paris , France
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40
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Franco CA, Blanc J, Parlakian A, Blanco R, Aspalter IM, Kazakova N, Diguet N, Mylonas E, Gao-Li J, Vaahtokari A, Penard-Lacronique V, Fruttiger M, Rosewell I, Mericskay M, Gerhardt H, Li Z. SRF selectively controls tip cell invasive behavior in angiogenesis. Development 2013; 140:2321-33. [PMID: 23674601 DOI: 10.1242/dev.091074] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Efficient angiogenic sprouting is essential for embryonic, postnatal and tumor development. Serum response factor (SRF) is known to be important for embryonic vascular development. Here, we studied the effect of inducible endothelial-specific deletion of Srf in postnatal and adult mice. We find that endothelial SRF activity is vital for postnatal growth and survival, and is equally required for developmental and pathological angiogenesis, including during tumor growth. Our results demonstrate that SRF is selectively required for endothelial filopodia formation and cell contractility during sprouting angiogenesis, but seems dispensable for vascular remodeling. At the molecular level, we observe that vascular endothelial growth factor A induces nuclear accumulation of myocardin-related transcription factors (MRTFs) and regulates MRTF/SRF-dependent target genes including Myl9, which is important for endothelial cell migration in vitro. We conclude that SRF has a unique function in regulating migratory tip cell behavior during sprouting angiogenesis. We hypothesize that targeting the SRF pathway could provide an opportunity to selectively target tip cell filopodia-driven angiogenesis to restrict tumor growth.
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Affiliation(s)
- Claudio A Franco
- UPMC Univ Paris 06, UR 4, Aging, Stress and Inflammation, 75005 Paris, France.
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41
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Weinl C, Riehle H, Park D, Stritt C, Beck S, Huber G, Wolburg H, Olson EN, Seeliger MW, Adams RH, Nordheim A. Endothelial SRF/MRTF ablation causes vascular disease phenotypes in murine retinae. J Clin Invest 2013; 123:2193-206. [PMID: 23563308 DOI: 10.1172/jci64201] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Accepted: 02/07/2013] [Indexed: 11/17/2022] Open
Abstract
Retinal vessel homeostasis ensures normal ocular functions. Consequently, retinal hypovascularization and neovascularization, causing a lack and an excess of vessels, respectively, are hallmarks of human retinal pathology. We provide evidence that EC-specific genetic ablation of either the transcription factor SRF or its cofactors MRTF-A and MRTF-B, but not the SRF cofactors ELK1 or ELK4, cause retinal hypovascularization in the postnatal mouse eye. Inducible, EC-specific deficiency of SRF or MRTF-A/MRTF-B during postnatal angiogenesis impaired endothelial tip cell filopodia protrusion, resulting in incomplete formation of the retinal primary vascular plexus, absence of the deep plexi, and persistence of hyaloid vessels. All of these features are typical of human hypovascularization-related vitreoretinopathies, such as familial exudative vitreoretinopathies including Norrie disease. In contrast, conditional EC deletion of Srf in adult murine vessels elicited intraretinal neovascularization that was reminiscent of the age-related human pathologies retinal angiomatous proliferation and macular telangiectasia. These results indicate that angiogenic homeostasis is ensured by differential stage-specific functions of SRF target gene products in the developing versus the mature retinal vasculature and suggest that the actin-directed MRTF-SRF signaling axis could serve as a therapeutic target in the treatment of human vascular retinal diseases.
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Affiliation(s)
- Christine Weinl
- Department for Molecular Biology, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
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Galmiche G, Labat C, Mericskay M, Aissa KA, Blanc J, Retailleau K, Bourhim M, Coletti D, Loufrani L, Gao-Li J, Feil R, Challande P, Henrion D, Decaux JF, Regnault V, Lacolley P, Li Z. Inactivation of Serum Response Factor Contributes To Decrease Vascular Muscular Tone and Arterial Stiffness in Mice. Circ Res 2013; 112:1035-45. [DOI: 10.1161/circresaha.113.301076] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Rationale:
Vascular smooth muscle (SM) cell phenotypic modulation plays an important role in arterial stiffening associated with aging. Serum response factor (SRF) is a major transcription factor regulating SM genes involved in maintenance of the contractile state of vascular SM cells.
Objective:
We investigated whether SRF and its target genes regulate intrinsic SM tone and thereby arterial stiffness.
Methods and Results:
The SRF gene was inactivated SM-specific knockout of SRF (SRF
SMKO
) specifically in vascular SM cells by injection of tamoxifen into adult transgenic mice. Fifteen days later, arterial pressure and carotid thickness were lower in SRF
SMKO
than in control mice. The carotid distensibility/pressure and elastic modulus/wall stress curves showed a greater arterial elasticity in SRF
SMKO
without modification in collagen/elastin ratio. In SRF
SMKO
, vasodilation was decreased in aorta and carotid arteries, whereas a decrease in contractile response was found in mesenteric arteries. By contrast, in mice with inducible SRF overexpression, the in vitro contractile response was significantly increased in all arteries. Without endothelium, the contraction was reduced in SRF
SMKO
compared with control aortic rings owing to impairment of the NO pathway. Contractile components (SM-actin and myosin light chain), regulators of the contractile response (myosin light chain kinase, myosin phosphatase target subunit 1, and protein kinase C–potentiated myosin phosphatase inhibitor) and integrins were reduced in SRF
SMKO
.
Conclusions:
SRF controls vasoconstriction in mesenteric arteries via vascular SM cell phenotypic modulation linked to changes in contractile protein gene expression. SRF-related decreases in vasomotor tone and cell-matrix attachment increase arterial elasticity in large arteries.
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Affiliation(s)
- Guillaume Galmiche
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Carlos Labat
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Mathias Mericskay
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Karima Ait Aissa
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Jocelyne Blanc
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Kevin Retailleau
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Mustapha Bourhim
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Dario Coletti
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Laurent Loufrani
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Jacqueline Gao-Li
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Robert Feil
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Pascal Challande
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Daniel Henrion
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Jean-François Decaux
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Véronique Regnault
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Patrick Lacolley
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
| | - Zhenlin Li
- From the UPMC Univ Paris 6, Paris, France (G.G., M.M., J.B., D.C., J.G.-L., Z.L.); INSERM-U872, Paris, France (G.G.); INSERM-U1116, Université de Lorraine, Vandoeuvre, France (C.L., K.A.A., M.B., V.R., P.L.); CNRS, UMR6214, INSERM, U771, Angers, France (K.R., L.L., D.H.); Interfakultäres Institut für Biochemie, Universität Tübingen, Tübingen, Germany (R.F.); UPMC Univ Paris 6, CNRS UMR 7190, Paris, France (P.C.); and Université Paris Descartes, CNRS UMR 8104, INSERM U1016, Paris, France (J.-F.D.)
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A critical cell-intrinsic role for serum response factor in glial specification in the CNS. J Neurosci 2012; 32:8012-23. [PMID: 22674276 DOI: 10.1523/jneurosci.5633-11.2012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Astrocytes and oligodendrocytes play crucial roles in nearly every facet of nervous system development and function, including neuronal migration, synaptogenesis, synaptic plasticity, and myelination. Previous studies have widely characterized the signaling pathways important for astrocyte differentiation and unveiled a number of transcription factors that guide oligodendrocyte differentiation in the CNS. However, the identities of the transcription factors critical for astrocyte specification in the brain remain unknown. Here we show that deletion of the stimulus-dependent transcription factor, serum response factor (SRF), in neural precursor cells (NPCs) (Srf-Nestin-cKO) results in nearly 60% loss in astrocytes and 50% loss in oligodendrocyte precursors at birth. Cultured SRF-deficient NPCs exhibited normal growth rate and capacity to self-renew. However, SRF-deficient NPCs generated fewer astrocytes and oligodendrocytes in response to several lineage-specific differentiation factors. These deficits in glial differentiation were rescued by ectopic expression of wild-type SRF in SRF-deficient NPCs. Interestingly, ectopic expression of a constitutively active SRF (SRF-VP16) in NPCs augmented astrocyte differentiation in the presence of pro-astrocytic factors. However, SRF-VP16 expression in NPCs had an inhibitory effect on oligodendrocyte differentiation. In contrast, mice carrying conditional deletion of SRF in developing forebrain neurons (Srf-NEX-cKO) did not exhibit any deficits in astrocytes in the brain. Together, our observations suggest that SRF plays a critical cell-autonomous role in NPCs to regulate astrocyte and oligodendrocyte specification in vivo and in vitro.
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Bhasin M, Huang Z, Pradhan-Nabzdyk L, Malek JY, LoGerfo PJ, Contreras M, Guthrie P, Csizmadia E, Andersen N, Kocher O, Ferran C, LoGerfo FW. Temporal network based analysis of cell specific vein graft transcriptome defines key pathways and hub genes in implantation injury. PLoS One 2012; 7:e39123. [PMID: 22720046 PMCID: PMC3376111 DOI: 10.1371/journal.pone.0039123] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 05/16/2012] [Indexed: 11/18/2022] Open
Abstract
Vein graft failure occurs between 1 and 6 months after implantation due to obstructive intimal hyperplasia, related in part to implantation injury. The cell-specific and temporal response of the transcriptome to vein graft implantation injury was determined by transcriptional profiling of laser capture microdissected endothelial cells (EC) and medial smooth muscle cells (SMC) from canine vein grafts, 2 hours (H) to 30 days (D) following surgery. Our results demonstrate a robust genomic response beginning at 2 H, peaking at 12-24 H, declining by 7 D, and resolving by 30 D. Gene ontology and pathway analyses of differentially expressed genes indicated that implantation injury affects inflammatory and immune responses, apoptosis, mitosis, and extracellular matrix reorganization in both cell types. Through backpropagation an integrated network was built, starting with genes differentially expressed at 30 D, followed by adding upstream interactive genes from each prior time-point. This identified significant enrichment of IL-6, IL-8, NF-κB, dendritic cell maturation, glucocorticoid receptor, and Triggering Receptor Expressed on Myeloid Cells (TREM-1) signaling, as well as PPARα activation pathways in graft EC and SMC. Interactive network-based analyses identified IL-6, IL-8, IL-1α, and Insulin Receptor (INSR) as focus hub genes within these pathways. Real-time PCR was used for the validation of two of these genes: IL-6 and IL-8, in addition to Collagen 11A1 (COL11A1), a cornerstone of the backpropagation. In conclusion, these results establish causality relationships clarifying the pathogenesis of vein graft implantation injury, and identifying novel targets for its prevention.
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Affiliation(s)
- Manoj Bhasin
- Genomics and Proteomics Center, Division of Interdisciplinary Medicine and Biotechnology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Zhen Huang
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Leena Pradhan-Nabzdyk
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Junaid Y. Malek
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Philip J. LoGerfo
- Genomics and Proteomics Center, Division of Interdisciplinary Medicine and Biotechnology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Mauricio Contreras
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Patrick Guthrie
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Eva Csizmadia
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Nicholas Andersen
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Olivier Kocher
- Deptartment of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Christiane Ferran
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
- Center for Vascular Biology Research and Division of Nephrology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Frank W. LoGerfo
- Division of Vascular and Endovascular Surgery, Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
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45
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Jumping the barrier: VE-cadherin, VEGF and other angiogenic modifiers in cancer. Biol Cell 2012; 103:593-605. [PMID: 22054419 DOI: 10.1042/bc20110069] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The endothelial barrier controls the passage of fluids, nutrients and cells through the vascular wall. This physiological function is closely related to developmental and adult angiogenesis, blood pressure control, as well as immune responses. Moreover, cancer progression is frequently characterized by disorganized and leaky blood vessels. In this context, vascular permeability drives tumour-induced angiogenesis, blood flow disturbances, inflammatory cell infiltration and tumour cell extravasation. Although various molecules have been implicated, the vascular endothelial adhesion molecule, VE-cadherin (vascular endothelial cadherin), has emerged as a critical player involved in maintaining endothelial barrier integrity and homoeostasis. Indeed, VE-cadherin coordinates the endothelial cell-cell junctions through its adhesive and signalling properties. Of note, many angiogenic and inflammatory mediators released into the tumour microenvironment influence VE-cadherin behaviour. Therefore restoring VE-cadherin function could be one very promising target for vascular normalization in cancer therapies. In this review, we will mainly focus on recent discoveries concerning the molecular mechanisms involved in modulating VE-cadherin plasticity in cancer.
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46
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Geudens I, Gerhardt H. Coordinating cell behaviour during blood vessel formation. Development 2011; 138:4569-83. [PMID: 21965610 DOI: 10.1242/dev.062323] [Citation(s) in RCA: 259] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The correct development of blood vessels is crucial for all aspects of tissue growth and physiology in vertebrates. The formation of an elaborate hierarchically branched network of endothelial tubes, through either angiogenesis or vasculogenesis, relies on a series of coordinated morphogenic events, but how individual endothelial cells adopt specific phenotypes and how they coordinate their behaviour during vascular patterning is unclear. Recent progress in our understanding of blood vessel formation has been driven by advanced imaging techniques and detailed analyses that have used a combination of powerful in vitro, in vivo and in silico model systems. Here, we summarise these models and discuss their advantages and disadvantages. We then review the different stages of blood vessel development, highlighting the cellular mechanisms and molecular players involved at each step and focusing on cell specification and coordination within the network.
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Affiliation(s)
- Ilse Geudens
- Vascular Patterning Laboratory, Vesalius Research Center, VIB, 3000 Leuven, Belgium
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47
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MiR-483-5p controls angiogenesis in vitro and targets serum response factor. FEBS Lett 2011; 585:3095-100. [DOI: 10.1016/j.febslet.2011.08.039] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Revised: 08/24/2011] [Accepted: 08/24/2011] [Indexed: 12/31/2022]
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48
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Gervais L, Casanova J. The Drosophila homologue of SRF acts as a boosting mechanism to sustain FGF-induced terminal branching in the tracheal system. Development 2011; 138:1269-74. [PMID: 21385762 DOI: 10.1242/dev.059188] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Recent data have demonstrated a crucial role for the transcription factor SRF (serum response factor) downstream of VEGF and FGF signalling during branching morphogenesis. This is the case for sprouting angiogenesis in vertebrates, axonal branching in mammals and terminal branching of the Drosophila tracheal system. However, the specific functions of SRF in these processes remain unclear. Here, we establish the relative contributions of the Drosophila homologues of FGF [Branchless (BNL)] and SRF [Blistered (BS)] in terminal tracheal branching. Conversely to an extended view, we show that BNL triggers terminal branching initiation in a DSRF-independent mechanism and that DSRF transcription induced by BNL signalling is required to maintain terminal branch elongation. Moreover, we report that increased and continuous FGF signalling can trigger tracheal cells to develop full-length terminal branches in the absence of DSRF transcription. Our results indicate that DSRF acts as an amplifying step to sustain the progression of terminal branch elongation even in the wild-type conditions of FGF signalling.
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Affiliation(s)
- Louis Gervais
- Institut de Biologia Molecular de Barcelona-CSIC, Parc Científic de Barcelona, c/ Baldiri Reixac, 10-12, 08028 Barcelona, Spain.
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Wallace MA, Hock MB, Hazen BC, Kralli A, Snow RJ, Russell AP. Striated muscle activator of Rho signalling (STARS) is a PGC-1α/oestrogen-related receptor-α target gene and is upregulated in human skeletal muscle after endurance exercise. J Physiol 2011; 589:2027-39. [PMID: 21486805 PMCID: PMC3090601 DOI: 10.1113/jphysiol.2011.205468] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 02/15/2011] [Indexed: 01/26/2023] Open
Abstract
The striated muscle activator of Rho signalling (STARS) is an actin-binding protein specifically expressed in cardiac, skeletal and smooth muscle. STARS has been suggested to provide an important link between the transduction of external stress signals to intracellular signalling pathways controlling genes involved in the maintenance of muscle function. The aims of this study were firstly, to establish if STARS, as well as members of its downstream signalling pathway, are upregulated following acute endurance cycling exercise; and secondly, to determine if STARS is a transcriptional target of peroxisome proliferator-activated receptor gamma co-activator 1-α (PGC-1α) and oestrogen-related receptor-α (ERRα). When measured 3 h post-exercise, STARS mRNA and protein levels as well as MRTF-A and serum response factor (SRF) nuclear protein content, were significantly increased by 140, 40, 40 and 40%, respectively. Known SRF target genes, carnitine palmitoyltransferase-1β (CPT-1β) and jun B proto-oncogene (JUNB), as well as the exercise-responsive genes PGC-1α mRNA and ERRα were increased by 2.3-, 1.8-, 4.5- and 2.7-fold, 3 h post-exercise. Infection of C2C12 myotubes with an adenovirus-expressing human PGC-1α resulted in a 3-fold increase in Stars mRNA, a response that was abolished following the suppression of endogenous ERRα. Over-expression of PGC-1α also increased Cpt-1β, Cox4 and Vegf mRNA by 6.2-, 2.0- and 2.0-fold, respectively. Suppression of endogenous STARS reduced basal Cpt-1β levels by 8.2-fold and inhibited the PGC-1α-induced increase in Cpt-1β mRNA. Our results show for the first time that the STARS signalling pathway is upregulated in response to acute endurance exercise. Additionally, we show in C2C12 myotubes that the STARS gene is a PGC-1α/ERRα transcriptional target. Furthermore, our results suggest a novel role of STARS in the co-ordination of PGC-1α-induced upregulation of the fat oxidative gene, CPT-1β.
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Affiliation(s)
- Marita A Wallace
- Centre for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Burwood 3125, Australia
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Holtz ML, Misra RP. Serum response factor is required for cell contact maintenance but dispensable for proliferation in visceral yolk sac endothelium. BMC DEVELOPMENTAL BIOLOGY 2011; 11:18. [PMID: 21401944 PMCID: PMC3065428 DOI: 10.1186/1471-213x-11-18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Accepted: 03/14/2011] [Indexed: 01/14/2023]
Abstract
Background Endothelial-specific knockout of the transcription factor serum response factor (SRF) results in embryonic lethality by mid-gestation. The associated phenotype exhibits vascular failure in embryos as well as visceral yolk sac (VYS) tissues. Previous data suggest that this vascular failure is caused by alterations in cell-cell and cell-matrix contacts. In the current study, we sought to more carefully address the role of SRF in endothelial function and cell contact interactions in VYS tissues. Results Tie2-Cre recombinase-mediated knockout of SRF expression resulted in loss of detectable SRF from VYS mesoderm by E12.5. This loss was accompanied by decreased expression of smooth muscle alpha-actin as well as vascular endothelial cadherin and claudin 5, endothelial-specific components of adherens and tight junctions, respectively. Focal adhesion (FA) integrins alpha5 and beta1 were largely unchanged in contrast to loss of the FA-associated molecule vinculin. The integrin binding partner fibronectin-1 was also profoundly decreased in the extracellular matrix, indicating another aspect of impaired adhesive function and integrin signaling. Additionally, cells in SRF-null VYS mesoderm failed to reduce proliferation, suggesting not only that integrin-mediated contact inhibition is impaired but also that SRF protein is not required for proliferation in these cells. Conclusions Our data support a model in which SRF is critical in maintaining functional cell-cell and cell-matrix adhesion in endothelial cells. Furthermore, we provide evidence that supports a model in which loss of SRF protein results in a sustained proliferation defect due in part to failed integrin signaling.
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Affiliation(s)
- Mary L Holtz
- Department of Biochemistry, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, Wisconsin 53226, USA.
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