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Abdelilah-Seyfried S, Ola R. Shear stress and pathophysiological PI3K involvement in vascular malformations. J Clin Invest 2024; 134:e172843. [PMID: 38747293 PMCID: PMC11093608 DOI: 10.1172/jci172843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2024] Open
Abstract
Molecular characterization of vascular anomalies has revealed that affected endothelial cells (ECs) harbor gain-of-function (GOF) mutations in the gene encoding the catalytic α subunit of PI3Kα (PIK3CA). These PIK3CA mutations are known to cause solid cancers when occurring in other tissues. PIK3CA-related vascular anomalies, or "PIKopathies," range from simple, i.e., restricted to a particular form of malformation, to complex, i.e., presenting with a range of hyperplasia phenotypes, including the PIK3CA-related overgrowth spectrum. Interestingly, development of PIKopathies is affected by fluid shear stress (FSS), a physiological stimulus caused by blood or lymph flow. These findings implicate PI3K in mediating physiological EC responses to FSS conditions characteristic of lymphatic and capillary vessel beds. Consistent with this hypothesis, increased PI3K signaling also contributes to cerebral cavernous malformations, a vascular disorder that affects low-perfused brain venous capillaries. Because the GOF activity of PI3K and its signaling partners are excellent drug targets, understanding PIK3CA's role in the development of vascular anomalies may inform therapeutic strategies to normalize EC responses in the diseased state. This Review focuses on PIK3CA's role in mediating EC responses to FSS and discusses current understanding of PIK3CA dysregulation in a range of vascular anomalies that particularly affect low-perfused regions of the vasculature. We also discuss recent surprising findings linking increased PI3K signaling to fast-flow arteriovenous malformations in hereditary hemorrhagic telangiectasias.
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Affiliation(s)
| | - Roxana Ola
- Experimental Pharmacology Mannheim, European Center for Angioscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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2
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Kuonqui K, Campbell AC, Sarker A, Roberts A, Pollack BL, Park HJ, Shin J, Brown S, Mehrara BJ, Kataru RP. Dysregulation of Lymphatic Endothelial VEGFR3 Signaling in Disease. Cells 2023; 13:68. [PMID: 38201272 PMCID: PMC10778007 DOI: 10.3390/cells13010068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/20/2023] [Accepted: 12/26/2023] [Indexed: 01/12/2024] Open
Abstract
Vascular endothelial growth factor (VEGF) receptor 3 (VEGFR3), a receptor tyrosine kinase encoded by the FLT4 gene, plays a significant role in the morphogenesis and maintenance of lymphatic vessels. Under both normal and pathologic conditions, VEGF-C and VEGF-D bind VEGFR3 on the surface of lymphatic endothelial cells (LECs) and induce lymphatic proliferation, migration, and survival by activating intracellular PI3K-Akt and MAPK-ERK signaling pathways. Impaired lymphatic function and VEGFR3 signaling has been linked with a myriad of commonly encountered clinical conditions. This review provides a brief overview of intracellular VEGFR3 signaling in LECs and explores examples of dysregulated VEGFR3 signaling in various disease states, including (1) lymphedema, (2) tumor growth and metastasis, (3) obesity and metabolic syndrome, (4) organ transplant rejection, and (5) autoimmune disorders. A more complete understanding of the molecular mechanisms underlying the lymphatic pathology of each disease will allow for the development of novel strategies to treat these chronic and often debilitating illnesses.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Babak J. Mehrara
- Plastic and Reconstructive Surgery Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Raghu P. Kataru
- Plastic and Reconstructive Surgery Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
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3
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Meng Y, Lv T, Zhang J, Shen W, Li L, Li Y, Liu X, Lei X, Lin X, Xu H, Meng A, Jia S. Temporospatial inhibition of Erk signaling is required for lymphatic valve formation. Signal Transduct Target Ther 2023; 8:342. [PMID: 37691058 PMCID: PMC10493226 DOI: 10.1038/s41392-023-01571-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 06/27/2023] [Accepted: 07/17/2023] [Indexed: 09/12/2023] Open
Abstract
Intraluminal lymphatic valves (LVs) and lymphovenous valves (LVVs) are critical to ensure the unidirectional flow of lymphatic fluid. Morphological abnormalities in these valves always cause lymph or blood reflux, and result in lymphedema. However, the underlying molecular mechanism of valve development remains poorly understood. We here report the implication of Efnb2-Ephb4-Rasa1 regulated Erk signaling axis in lymphatic valve development with identification of two new valve structures. Dynamic monitoring of phospho-Erk activity indicated that Erk signaling is spatiotemporally inhibited in some lymphatic endothelial cells (LECs) during the valve cell specification. Inhibition of Erk signaling via simultaneous depletion of zygotic erk1 and erk2 or treatment with MEK inhibitor selumetinib causes lymphatic vessel hypoplasia and lymphatic valve hyperplasia, suggesting opposite roles of Erk signaling during these two processes. ephb4b mutants, efnb2a;efnb2b or rasa1a;rasa1b double mutants all have defective LVs and LVVs and exhibit blood reflux into lymphatic vessels with an edema phenotype. Importantly, the valve defects in ephb4b or rasa1a;rasa1b mutants are mitigated with high-level gata2 expression in the presence of MEK inhibitors. Therefore, Efnb2-Ephb4 signaling acts to suppress Erk activation in valve-forming cells to promote valve specification upstream of Rasa1. Not only do our findings reveal a molecular mechanism of lymphatic valve formation, but also provide a basis for the treatment of lymphatic disorders.
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Affiliation(s)
- Yaping Meng
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Tong Lv
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Junfeng Zhang
- Guangzhou Laboratory, Guangzhou, 510320, Guangdong Province, China
| | - Weimin Shen
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Lifang Li
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yaqi Li
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Xin Liu
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Xing Lei
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xuguang Lin
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Hanfang Xu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Anming Meng
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
- Guangzhou Laboratory, Guangzhou, 510320, Guangdong Province, China.
| | - Shunji Jia
- State Key Laboratory of Membrane Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
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4
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Sabe SA, Harris DD, Broadwin M, Sabra M, Xu CM, Banerjee D, Abid MR, Sellke FW. Sitagliptin therapy improves myocardial perfusion and arteriolar collateralization in chronically ischemic myocardium: A pilot study. Physiol Rep 2023; 11:e15744. [PMID: 37300400 PMCID: PMC10257079 DOI: 10.14814/phy2.15744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 05/15/2023] [Accepted: 05/15/2023] [Indexed: 06/12/2023] Open
Abstract
Dipeptidyl peptidase 4 inhibitors (DPP4i) may be cardioprotective based on several small animal and clinical studies, though randomized control trials have demonstrated limited benefit. Given these discrepant findings, the role of these agents in chronic myocardial disease, particularly in the absence of diabetes, is still poorly understood. The purpose of this study was to determine the effects of sitagliptin, a DPP4i, on myocardial perfusion and microvessel density in a clinically relevant large animal model of chronic myocardial ischemia. Normoglycemic Yorkshire swine underwent ameroid constrictor placement to the left circumflex artery to induce chronic myocardial ischemia. Two weeks later, pigs received either no drug (CON, n = 8) or 100 mg oral sitagliptin (SIT) daily (n = 5). Treatment continued for 5 weeks, followed by hemodynamic measurements, euthanasia, and tissue harvest of ischemic myocardium. There were no significant differences in myocardial function between CON and SIT as measured by stroke work (p > 0.5), cardiac output (p = 0.22), and end-systolic elastance (p = 0.17). SIT was associated with increased absolute blood flow at rest (17% increase, IQR 12-62, p = 0.045) and during pacing (89% increase, IQR 83-105, p = 0.002). SIT was also associated with improved arteriolar density (p = 0.045) compared with CON, without changes in capillary density (p = 0.72). SIT was associated with increased expression of pro-arteriogenic markers MCP-1 (p = 0.003), TGFß (p = 0.03), FGFR1 (p = 0.002), and ICAM-1 (p = 0.03), with a trend toward an increase in the ratio of phosphorylated/active PLCγ1 to total PLCγ1 (p = 0.11) compared with CON. In conclusion, in chronically ischemic myocardium, sitagliptin improves myocardial perfusion and arteriolar collateralization via the activation of pro-arteriogenic signaling pathways.
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Affiliation(s)
- Sharif A. Sabe
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
| | - Dwight Douglas Harris
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
| | - Mark Broadwin
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
| | - Mohamed Sabra
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
| | - Cynthia M. Xu
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
| | - Debolina Banerjee
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
| | - M. Ruhul Abid
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
| | - Frank W. Sellke
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island HospitalAlpert Medical School of Brown University, Rhode Island HospitalProvidenceRhode IslandUSA
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Ribieras AJ, Ortiz YY, Li Y, Le NT, Huerta CT, Voza FA, Shao H, Vazquez-Padron RI, Liu ZJ, Velazquez OC. E-Selectin/AAV Gene Therapy Promotes Myogenesis and Skeletal Muscle Recovery in a Mouse Hindlimb Ischemia Model. Cardiovasc Ther 2023; 2023:6679390. [PMID: 37251271 PMCID: PMC10219778 DOI: 10.1155/2023/6679390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 04/25/2023] [Accepted: 05/10/2023] [Indexed: 05/31/2023] Open
Abstract
The response to ischemia in peripheral artery disease (PAD) depends on compensatory neovascularization and coordination of tissue regeneration. Identifying novel mechanisms regulating these processes is critical to the development of nonsurgical treatments for PAD. E-selectin is an adhesion molecule that mediates cell recruitment during neovascularization. Therapeutic priming of ischemic limb tissues with intramuscular E-selectin gene therapy promotes angiogenesis and reduces tissue loss in a murine hindlimb gangrene model. In this study, we evaluated the effects of E-selectin gene therapy on skeletal muscle recovery, specifically focusing on exercise performance and myofiber regeneration. C57BL/6J mice were treated with intramuscular E-selectin/adeno-associated virus serotype 2/2 gene therapy (E-sel/AAV) or LacZ/AAV2/2 (LacZ/AAV) as control and then subjected to femoral artery coagulation. Recovery of hindlimb perfusion was assessed by laser Doppler perfusion imaging and muscle function by treadmill exhaustion and grip strength testing. After three postoperative weeks, hindlimb muscle was harvested for immunofluorescence analysis. At all postoperative time points, mice treated with E-sel/AAV had improved hindlimb perfusion and exercise capacity. E-sel/AAV gene therapy also increased the coexpression of MyoD and Ki-67 in skeletal muscle progenitors and the proportion of Myh7+ myofibers. Altogether, our findings demonstrate that in addition to improving reperfusion, intramuscular E-sel/AAV gene therapy enhances the regeneration of ischemic skeletal muscle with a corresponding benefit on exercise performance. These results suggest a potential role for E-sel/AAV gene therapy as a nonsurgical adjunct in patients with life-limiting PAD.
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Affiliation(s)
- Antoine J. Ribieras
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Yulexi Y. Ortiz
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Yan Li
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Nga T. Le
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Carlos T. Huerta
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Francesca A. Voza
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Hongwei Shao
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Roberto I. Vazquez-Padron
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Vascular Biology Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Zhao-Jun Liu
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Vascular Biology Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Omaida C. Velazquez
- Division of Vascular Surgery, DeWitt Daughtry Family Department of Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Vascular Biology Institute, University of Miami Miller School of Medicine, Miami, FL 33136, USA
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6
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MacRae CA, Peterson RT. Zebrafish as a Mainstream Model for In Vivo Systems Pharmacology and Toxicology. Annu Rev Pharmacol Toxicol 2023; 63:43-64. [PMID: 36151053 DOI: 10.1146/annurev-pharmtox-051421-105617] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Pharmacology and toxicology are part of a much broader effort to understand the relationship between chemistry and biology. While biomedicine has necessarily focused on specific cases, typically of direct human relevance, there are real advantages in pursuing more systematic approaches to characterizing how health and disease are influenced by small molecules and other interventions. In this context, the zebrafish is now established as the representative screenable vertebrate and, through ongoing advances in the available scale of genome editing and automated phenotyping, is beginning to address systems-level solutions to some biomedical problems. The addition of broader efforts to integrate information content across preclinical model organisms and the incorporation of rigorous analytics, including closed-loop deep learning, will facilitate efforts to create systems pharmacology and toxicology with the ability to continuously optimize chemical biological interactions around societal needs. In this review, we outline progress toward this goal.
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Affiliation(s)
- Calum A MacRae
- Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts, USA;
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7
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Mrinalini R, Tamilanban T, Naveen Kumar V, Manasa K. Zebrafish - The Neurobehavioural Model in Trend. Neuroscience 2022; 520:95-118. [PMID: 36549602 DOI: 10.1016/j.neuroscience.2022.12.016] [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: 03/24/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
Zebrafish (Danio rerio) is currently in vogue as a prevalently used experimental model for studies concerning neurobehavioural disorders and associated fields. Since the 1960s, this model has succeeded in breaking most barriers faced in the hunt for an experimental model. From its appearance to its high parity with human beings genetically, this model renders itself as an advantageous experimental lab animal. Neurobehavioural disorders have always posed an arduous task in terms of their detection as well as in determining their exact etiology. They are still, in most cases, diseases of interest for inventing or discovering novel pharmacological interventions. Thus, the need for a harbinger experimental model for studying neurobehaviours is escalating. Ensuring the same model is used for studying several neuro-studies conserves the results from inter-species variations. For this, we need a model that satisfies all the pre-requisite conditions to be made the final choice of model for neurobehavioural studies. This review recapitulates the progress of zebrafish as an experimental model with its most up-to-the-minute advances in the area. Various tests, assays, and responses employed using zebrafish in screening neuroactive drugs have been tabulated effectively. The tools, techniques, protocols, and apparatuses that bolster zebrafish studies are discussed. The probable research that can be done using zebrafish has also been briefly outlined. The various breeding and maintenance methods employed, along with the information on various strains available and most commonly used, are also elaborated upon, supplementing Zebrafish's use in neuroscience.
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Affiliation(s)
- R Mrinalini
- Department of Pharmacology, SRM College of Pharmacy, SRMIST, Kattankulathur, India - 603203
| | - T Tamilanban
- Department of Pharmacology, SRM College of Pharmacy, SRMIST, Kattankulathur, India - 603203
| | - V Naveen Kumar
- Department of Pharmacology, SRM College of Pharmacy, SRMIST, Kattankulathur, India - 603203.
| | - K Manasa
- Department of Pharmacology, SRM College of Pharmacy, SRMIST, Kattankulathur, India - 603203
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Guo Y, Jiang Y, Rose JB, Nagaraju GP, Jaskula-Sztul R, Hjelmeland AB, Beck AW, Chen H, Ren B. Protein Kinase D1 Signaling in Cancer Stem Cells with Epithelial-Mesenchymal Plasticity. Cells 2022; 11:3885. [PMID: 36497140 PMCID: PMC9739736 DOI: 10.3390/cells11233885] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/10/2022] [Accepted: 11/20/2022] [Indexed: 12/05/2022] Open
Abstract
Pancreatic neuroendocrine tumors (pNETs) are extremely diverse and highly vascularized neoplasms that arise from endocrine cells in the pancreas. The pNETs harbor a subpopulation of stem cell-like malignant cells, known as cancer stem cells (CSCs), which contribute to intratumoral heterogeneity and promote tumor maintenance and recurrence. In this study, we demonstrate that CSCs in human pNETs co-express protein kinase PKD1 and CD44. We further identify PKD1 signaling as a critical pathway in the control of CSC maintenance in pNET cells. PKD1 signaling regulates the expression of a CSC- and EMT-related gene signature and promotes CSC self-renewal, likely leading to the preservation of a subpopulation of CSCs at an intermediate EMT state. This suggests that the PKD1 signaling pathway may be required for the development of a unique CSC phenotype with plasticity and partial EMT. Given that the signaling networks connected with CSC maintenance and EMT are complex, and extend through multiple levels of regulation, this study provides insight into signaling regulation of CSC plasticity and partial EMT in determining the fate of CSCs. Inhibition of the PKD1 pathway may facilitate the elimination of specific CSC subsets, thereby curbing tumor progression and metastasis.
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Affiliation(s)
- Yichen Guo
- Department of Surgery, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Yinan Jiang
- Department of Surgery, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - J. Bart Rose
- Department of Surgery, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- O’Neal Comprehensive Cancer Center, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Ganji Purnachandra Nagaraju
- Department of Medicine, Division of Hematology and Oncology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Renata Jaskula-Sztul
- Department of Surgery, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- O’Neal Comprehensive Cancer Center, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Anita B. Hjelmeland
- O’Neal Comprehensive Cancer Center, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Cell Developmental and Integrative Biology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Adam W. Beck
- Department of Surgery, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Herbert Chen
- Department of Surgery, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- O’Neal Comprehensive Cancer Center, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Bin Ren
- Department of Surgery, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- O’Neal Comprehensive Cancer Center, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- GBS Biomedical Engineering Program, Graduate School, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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9
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Irons L, Estrada AC, Humphrey JD. Intracellular signaling control of mechanical homeostasis in the aorta. Biomech Model Mechanobiol 2022; 21:1339-1355. [PMID: 35867282 PMCID: PMC10547132 DOI: 10.1007/s10237-022-01593-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/10/2022] [Indexed: 11/27/2022]
Abstract
Mature arteries exhibit a preferred biomechanical state in health evidenced by a narrow range of intramural and wall shear stresses. When stresses are perturbed by changes in blood pressure or flow, homeostatic mechanisms tend to restore target values via altered contractility and/or cell and matrix turnover. In contrast, vascular disease associates with compromised homeostasis, hence we must understand mechanisms underlying mechanical homeostasis and its robustness. Here, we use a multiscale computational model wherein mechanosensitive intracellular signaling pathways drive arterial growth and remodeling. First, we identify an ensemble of cell-level parameterizations where tissue-level responses are well-regulated and adaptive to hemodynamic perturbations. The responsible mechanism is persistent multiscale negative feedback whereby mechanosensitive signaling drives mass turnover until homeostatic target stresses are reached. This demonstrates how robustness emerges despite inevitable cell and individual heterogeneity. Second, we investigate tissue-level effects of signaling node knockdowns (ATIR, ROCK, TGF[Formula: see text]RII, PDGFR, ERK1/2) and find general agreement with experimental reports of fault tolerance. Robustness against structural changes manifests via low engagement of the node under baseline stresses or compensatory multiscale feedback via upregulation of additional pathways. Third, we show how knockdowns affect collagen and smooth muscle turnover at baseline and with perturbed stresses. In several cases, basal production is not remarkably affected, but sensitivities to stress deviations, which influence feedback strength, are reduced. Such reductions can impair adaptive responses, consistent with previously reported aortic vulnerability despite grossly normal appearances. Reduced stress sensitivities thus form a candidate mechanism for how robustness is lost, enabling transitions from health towards disease.
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Affiliation(s)
- Linda Irons
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - Ana C Estrada
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - Jay D Humphrey
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA.
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10
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Sugiyama A, Hirashima M. Fetal nuchal edema and developmental anomalies caused by gene mutations in mice. Front Cell Dev Biol 2022; 10:949013. [PMID: 36111337 PMCID: PMC9468611 DOI: 10.3389/fcell.2022.949013] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/02/2022] [Indexed: 12/02/2022] Open
Abstract
Fetal nuchal edema, a subcutaneous accumulation of extracellular fluid in the fetal neck, is detected as increased nuchal translucency (NT) by ultrasonography in the first trimester of pregnancy. It has been demonstrated that increased NT is associated with chromosomal anomalies and genetic syndromes accompanied with fetal malformations such as defective lymphatic vascular development, cardiac anomalies, anemia, and a wide range of other fetal anomalies. However, in many clinical cases of increased NT, causative genes, pathogenesis and prognosis have not been elucidated in humans. On the other hand, a large number of gene mutations have been reported to induce fetal nuchal edema in mouse models. Here, we review the relationship between the gene mutants causing fetal nuchal edema with defective lymphatic vascular development, cardiac anomalies, anemia and blood vascular endothelial barrier anomalies in mice. Moreover, we discuss how studies using gene mutant mouse models will be useful in developing diagnostic method and predicting prognosis.
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11
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Zhang C, He H, Dai J, Li Y, He J, Yang W, Dai J, Han F, Kong W, Wang X, Zheng X, Zhou J, Pan W, Chen Z, Singhal M, Zhang Y, Guo F, Hu J. KANK4 Promotes Arteriogenesis by Potentiating VEGFR2 Signaling in a TALIN-1-Dependent Manner. Arterioscler Thromb Vasc Biol 2022; 42:772-788. [PMID: 35477278 DOI: 10.1161/atvbaha.122.317711] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Arteriogenesis plays a critical role in maintaining adequate tissue blood supply and is related to a favorable prognosis in arterial occlusive diseases. Strategies aimed at promoting arteriogenesis have thus far not been successful because the factors involved in arteriogenesis remain incompletely understood. Previous studies suggest that evolutionarily conserved KANK4 (KN motif and ankyrin repeat domain-containing proteins 4) might involve in vertebrate vessel development. However, how the KANK4 regulates vessel function remains unknown. We aim to determine the role of endothelial cell-specifically expressed KANK4 in arteriogenesis. METHODS The role of KANK4 in regulating arteriogenesis was evaluated using Kank4-/- and KANK4iECOE mice. Molecular mechanisms underlying KANK4-potentiated arteriogenesis were investigated by employing RNA transcriptomic profiling and mass spectrometry analysis. RESULTS By analyzing Kank4-EGFP reporter mice, we showed that KANK4 was specifically expressed in endothelial cells. In particular, KANK4 displayed a dynamic expression pattern from being ubiquitously expressed in all endothelial cells of the developing vasculature to being explicitly expressed in the endothelial cells of arterioles and arteries in matured vessels. In vitro microfluidic chip-based vascular morphology analysis and in vivo hindlimb ischemia assays using Kank4-/- and KANK4iECOE mice demonstrated that deletion of KANK4 impaired collateral artery growth and the recovery of blood perfusion, whereas KANK4 overexpression leads to increased vessel caliber and blood perfusion. Bulk RNA sequencing and Co-immunoprecipitation/mass spectrometry (Co-IP/MS) analysis identified that KANK4 promoted EC proliferation and collateral artery remodeling through coupling VEGFR2 (vascular endothelial growth factor receptor 2) to TALIN-1, which augmented the activation of the VEGFR2 signaling cascade. CONCLUSIONS This study reveals a novel role for KANK4 in arteriogenesis in response to ischemia. KANK4 links VEGFR2 to TALIN-1, resulting in enhanced VEGFR2 activation and increased EC proliferation, highlighting that KANK4 is a potential therapeutic target for promoting arteriogenesis for arterial occlusive diseases.
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Affiliation(s)
- Chonghe Zhang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
| | - Hao He
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
| | - Jianing Dai
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu)
| | | | - Jing He
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
| | - Wu Yang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
| | - Jialin Dai
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
| | - Feng Han
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu)
| | - Wenyan Kong
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu)
| | - Xiaohong Wang
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, China (X.W., X.Z.)
| | - Xiangjian Zheng
- Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, China (X.W., X.Z.)
| | - Jing Zhou
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Sciences, Ministry of Education, Beijing (J.Z.)
| | - Weijun Pan
- Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai, China (W.P.)
| | - Zhongwen Chen
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
| | - Mahak Singhal
- Division of Vascular Oncology and Metastasis, German Cancer Research Center (DKFZ-ZMBH Alliance), Heidelberg, Germany (M.S.).,Department of Vascular Biology and Tumor Angiogenesis, European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Germany (M.S.)
| | - Yaoyang Zhang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
| | - Feng Guo
- Department of Plastic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, China (F.G.)
| | - Junhao Hu
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China (C.Z., H.H., J.D., J. He, W.Y., J.D., F.H., W.K., Z.C., Y.Z., J. Hu).,University of Chinese Academy of Sciences, Beijing, China (C.Z., H.H., J.H., W.Y., J.D., Z.C., Y.Z., J. Hu)
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12
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MEKK3-TGFβ crosstalk regulates inward arterial remodeling. Proc Natl Acad Sci U S A 2021; 118:2112625118. [PMID: 34911761 DOI: 10.1073/pnas.2112625118] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2021] [Indexed: 01/08/2023] Open
Abstract
Arterial remodeling is an important adaptive mechanism that maintains normal fluid shear stress in a variety of physiologic and pathologic conditions. Inward remodeling, a process that leads to reduction in arterial diameter, plays a critical role in progression of such common diseases as hypertension and atherosclerosis. Yet, despite its pathogenic importance, molecular mechanisms controlling inward remodeling remain undefined. Mitogen-activated protein kinases (MAPKs) perform a number of functions ranging from control of proliferation to migration and cell-fate transitions. While the MAPK ERK1/2 signaling pathway has been extensively examined in the endothelium, less is known about the role of the MEKK3/ERK5 pathway in vascular remodeling. To better define the role played by this signaling cascade, we studied the effect of endothelial-specific deletion of its key upstream MAP3K, MEKK3, in adult mice. The gene's deletion resulted in a gradual inward remodeling of both pulmonary and systematic arteries, leading to spontaneous hypertension in both vascular circuits and accelerated progression of atherosclerosis in hyperlipidemic mice. Molecular analysis revealed activation of TGFβ-signaling both in vitro and in vivo. Endothelial-specific TGFβR1 knockout prevented inward arterial remodeling in MEKK3 endothelial knockout mice. These data point to the unexpected participation of endothelial MEKK3 in regulation of TGFβR1-Smad2/3 signaling and inward arterial remodeling in artery diseases.
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13
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Ren B, Ramchandran R, Yang X. Editorial: Molecular Mechanisms and Signaling in Endothelial Cell Biology and Vascular Heterogeneity. Front Cell Dev Biol 2021; 9:821100. [PMID: 34977049 PMCID: PMC8718799 DOI: 10.3389/fcell.2021.821100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 11/25/2021] [Indexed: 12/14/2022] Open
Affiliation(s)
- Bin Ren
- Department of Surgery, O’Neal Comprehensive Cancer Center, and Comprehensive Cardiovascular Center, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- *Correspondence: Bin Ren,
| | - Ramani Ramchandran
- Department of Pediatrics and Children’s Research Institute, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Xiaofeng Yang
- Department of Cardiovascular Sciences, Centers for Cardiovascular Research and Metabolic Disease Research, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
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14
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Warmke N, Platt F, Bruns AF, Ozber CH, Haywood NJ, Abudushalamu Y, Slater C, Palin V, Sukumar P, Wheatcroft SB, Yuldasheva NY, Kearney MT, Griffin KJ, Cubbon RM. Pericyte Insulin Receptors Modulate Retinal Vascular Remodeling and Endothelial Angiopoietin Signaling. Endocrinology 2021; 162:bqab182. [PMID: 34460911 PMCID: PMC8462386 DOI: 10.1210/endocr/bqab182] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Indexed: 12/15/2022]
Abstract
Pericytes regulate vascular development, stability, and quiescence; their dysfunction contributes to diabetic retinopathy. To explore the role of insulin receptors in pericyte biology, we created pericyte insulin receptor knockout mice (PIRKO) by crossing PDGFRβ-Cre mice with insulin receptor (Insr) floxed mice. Their neonatal retinal vasculature exhibited perivenous hypervascularity with venular dilatation, plus increased angiogenic sprouting in superficial and deep layers. Pericyte coverage of capillaries was unaltered in perivenous and periarterial plexi, and no differences in vascular regression or endothelial proliferation were apparent. Isolated brain pericytes from PIRKO had decreased angiopoietin-1 mRNA, whereas retinal and lung angiopoietin-2 mRNA was increased. Endothelial phospho-Tie2 staining was diminished and FoxO1 was more frequently nuclear localized in the perivenous plexus of PIRKO, in keeping with reduced angiopoietin-Tie2 signaling. Silencing of Insr in human brain pericytes led to reduced insulin-stimulated angiopoietin-1 secretion, and conditioned media from these cells was less able to induce Tie2 phosphorylation in human endothelial cells. Hence, insulin signaling in pericytes promotes angiopoietin-1 secretion and endothelial Tie2 signaling and perturbation of this leads to excessive vascular sprouting and venous plexus abnormalities. This phenotype mimics elements of diabetic retinopathy, and future work should evaluate pericyte insulin signaling in this disease.
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Affiliation(s)
- Nele Warmke
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
- Max-Delbrück-Centrum für Molekulare Medizin (MDC), Berlin, Germany
| | - Fiona Platt
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Alexander F Bruns
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Claire H Ozber
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Natalie J Haywood
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Yilizila Abudushalamu
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Charles Slater
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Victoria Palin
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Piruthivi Sukumar
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Stephen B Wheatcroft
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Nadira Y Yuldasheva
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Mark T Kearney
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Kathryn J Griffin
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
| | - Richard M Cubbon
- Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds, UK
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15
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Khan SA, Goliwas KF, Deshane JS. Sphingolipids in Lung Pathology in the Coronavirus Disease Era: A Review of Sphingolipid Involvement in the Pathogenesis of Lung Damage. Front Physiol 2021; 12:760638. [PMID: 34690821 PMCID: PMC8531546 DOI: 10.3389/fphys.2021.760638] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/21/2021] [Indexed: 12/17/2022] Open
Abstract
Sphingolipids are bioactive lipids involved in the regulation of cell survival, proliferation, and the inflammatory response. The SphK/S1P/S1PR pathway (S1P pathway) is a driver of many anti-apoptotic and proliferative processes. Pro-survival sphingolipid sphingosine-1-phosphate (S1P) initiates its signaling cascade by interacting with various sphingosine-1-phosphate receptors (S1PR) through which it is able to exert its pro-survival or inflammatory effects. Whereas sphingolipids, including ceramides and sphingosines are pro-apoptotic. The pro-apoptotic lipid, ceramide, can be produced de novo by ceramide synthases and converted to sphingosine by way of ceramidases. The balance of these antagonistic lipids and how this balance manifests is the essence of the sphingolipid rheostat. Recent studies on SARS-CoV-2 have implicated the S1P pathway in the pathogenesis of novel coronavirus disease COVID-19-related lung damage. Accumulating evidence indicates that an aberrant inflammatory process, known as "cytokine storm" causes lung injury in COVID-19, and studies have shown that the S1P pathway is involved in signaling this hyperinflammatory response. Beyond the influence of this pathway on cytokine storm, over the last decade the S1P pathway has been investigated for its role in a wide array of lung pathologies, including pulmonary fibrosis, pulmonary arterial hypertension (PAH), and lung cancer. Various studies have used S1P pathway modulators in models of lung disease; many of these efforts have yielded results that point to the potential efficacy of targeting this pathway for future treatment options. Additionally, they have emphasized S1P pathway's significant role in inflammation, fibrosis, and a number of other endothelial and epithelial changes that contribute to lung damage. This review summarizes the S1P pathway's involvement in COVID-19 and chronic lung diseases and discusses the potential for targeting S1P pathway as a therapeutic option for these diseases.
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Affiliation(s)
| | | | - Jessy S. Deshane
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
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16
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From remodeling to quiescence: The transformation of the vascular network. Cells Dev 2021; 168:203735. [PMID: 34425253 DOI: 10.1016/j.cdev.2021.203735] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/14/2021] [Accepted: 08/16/2021] [Indexed: 12/15/2022]
Abstract
The vascular system is essential for embryogenesis, healing, and homeostasis. Dysfunction or deregulated blood vessel function contributes to multiple diseases, including diabetic retinopathy, cancer, hypertension, or vascular malformations. A balance between the formation of new blood vessels, vascular remodeling, and vessel quiescence is fundamental for tissue growth and function. Whilst the major mechanisms contributing to the formation of new blood vessels have been well explored in recent years, vascular remodeling and quiescence remain poorly understood. In this review, we highlight the cellular and molecular mechanisms responsible for vessel remodeling and quiescence during angiogenesis. We further underline how impaired remodeling and/or destabilization of vessel networks can contribute to vascular pathologies. Finally, we speculate how addressing the molecular mechanisms of vascular remodeling and stabilization could help to treat vascular-related disorders.
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17
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Cao X, Xu B, Li X, Li T, He Y. A Genetically Engineered Mouse Model of Venous Anomaly and Retinal Angioma-like Vascular Malformation. Bio Protoc 2021; 11:e4117. [PMID: 34458411 DOI: 10.21769/bioprotoc.4117] [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: 02/17/2021] [Revised: 04/21/2021] [Accepted: 04/23/2021] [Indexed: 11/02/2022] Open
Abstract
Characterization of key regulators in vein development will advance our understanding of mechanisms underlying venous anomalies and provide therapeutic targets for the treatment of vascular malformations. Here, we provide a detailed protocol for the generation of genetically engineered mouse models targeting the Tek gene for the analysis of vein formation and vein-associated vascular diseases at the embryonic and postnatal stages. It includes steps involved in the whole-mount processing of mouse skin, mesentery, and retina for the examination of vascular malformation during embryonic and postnatal development.
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Affiliation(s)
- Xudong Cao
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, National Clinical Research Center for Hematologic Diseases, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou 215123, China
| | - Beibei Xu
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, National Clinical Research Center for Hematologic Diseases, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou 215123, China
| | - Xiao Li
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, National Clinical Research Center for Hematologic Diseases, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou 215123, China
| | - Taotao Li
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, National Clinical Research Center for Hematologic Diseases, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou 215123, China
| | - Yulong He
- Cyrus Tang Hematology Center, Collaborative Innovation Center of Hematology, National Clinical Research Center for Hematologic Diseases, State Key Laboratory of Radiation Medicine and Protection, Cam-Su Genomic Resources Center, Soochow University, Suzhou 215123, China
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18
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Chen D, Schwartz MA, Simons M. Developmental Perspectives on Arterial Fate Specification. Front Cell Dev Biol 2021; 9:691335. [PMID: 34249941 PMCID: PMC8269928 DOI: 10.3389/fcell.2021.691335] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 05/18/2021] [Indexed: 12/18/2022] Open
Abstract
Blood vessel acquisition of arterial or venous fate is an adaptive phenomenon in response to increasing blood circulation during vascular morphogenesis. The past two decades of effort in this field led to development of a widely accepted paradigm of molecular regulators centering on VEGF and Notch signaling. More recent findings focused on shear stress-induced cell cycle arrest as a prerequisite for arterial specification substantially modify this traditional understanding. This review aims to summarize key molecular mechanisms that work in concert to drive the acquisition of arterial fate in two distinct developmental settings of vascular morphogenesis: de novo vasculogenesis of the dorsal aorta and postnatal retinal angiogenesis. We will also discuss the questions and conceptual controversies that potentially point to novel directions of investigation and possible clinical relevance.
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Affiliation(s)
- Dongying Chen
- Yale Cardiovascular Research Center, Departments of Internal Medicine, Yale University School of Medicine, New Haven, CT, United States
| | - Martin A. Schwartz
- Yale Cardiovascular Research Center, Departments of Internal Medicine, Yale University School of Medicine, New Haven, CT, United States
- Department of Cell Biology, Yale University School of Medicine, New Haven, CT, United States
- Department of Biomedical Engineering, Yale University, New Haven, CT, United States
| | - Michael Simons
- Yale Cardiovascular Research Center, Departments of Internal Medicine, Yale University School of Medicine, New Haven, CT, United States
- Department of Cell Biology, Yale University School of Medicine, New Haven, CT, United States
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19
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Jiang Y, Guo Y, Hao J, Guenter R, Lathia J, Beck AW, Hattaway R, Hurst D, Wang QJ, Liu Y, Cao Q, Krontiras H, Chen H, Silverstein R, Ren B. Development of an arteriolar niche and self-renewal of breast cancer stem cells by lysophosphatidic acid/protein kinase D signaling. Commun Biol 2021; 4:780. [PMID: 34168243 PMCID: PMC8225840 DOI: 10.1038/s42003-021-02308-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 06/04/2021] [Indexed: 02/05/2023] Open
Abstract
Breast cancer stem cells (BCSCs) are essential for cancer growth, metastasis and recurrence. The regulatory mechanisms of BCSC interactions with the vascular niche within the tumor microenvironment (TME) and their self-renewal are currently under extensive investigation. We have demonstrated the existence of an arteriolar niche in the TME of human BC tissues. Intriguingly, BCSCs tend to be enriched within the arteriolar niche in human estrogen receptor positive (ER+) BC and bi-directionally interact with arteriolar endothelial cells (ECs). Mechanistically, this interaction is driven by the lysophosphatidic acid (LPA)/protein kinase D (PKD-1) signaling pathway, which promotes both arteriolar differentiation of ECs and self-renewal of CSCs likely via differential regulation of CD36 transcription. This study indicates that CSCs may enjoy blood perfusion to maintain their stemness features. Targeting the LPA/PKD-1 -CD36 signaling pathway may have therapeutic potential to curb tumor progression by disrupting the arteriolar niche and effectively eliminating CSCs.
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Affiliation(s)
- Yinan Jiang
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Yichen Guo
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
- Biomedical Engineering, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Jinjin Hao
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Rachael Guenter
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Justin Lathia
- Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic, Cleveland, OH, USA
| | - Adam W Beck
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Reagan Hattaway
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Douglas Hurst
- Department of Pathology, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Qiming Jane Wang
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Yehe Liu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, USA
| | - Qi Cao
- Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Helen Krontiras
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
| | - Herbert Chen
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
- Biomedical Engineering, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Roy Silverstein
- Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, WI, USA
| | - Bin Ren
- Department of Surgery, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA.
- Biomedical Engineering, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA.
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA.
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20
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Mooli RGR, Rodriguez J, Takahashi S, Solanki S, Gonzalez FJ, Ramakrishnan SK, Shah YM. Hypoxia via ERK Signaling Inhibits Hepatic PPARα to Promote Fatty Liver. Cell Mol Gastroenterol Hepatol 2021; 12:585-597. [PMID: 33798787 PMCID: PMC8258975 DOI: 10.1016/j.jcmgh.2021.03.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 03/17/2021] [Accepted: 03/17/2021] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Fatty liver or nonalcoholic fatty liver disease (NAFLD) is the most common liver disease associated with comorbidities such as insulin resistance and cardiovascular and metabolic diseases. Chronic activation of hypoxic signaling, in particular, hypoxia-inducible factor (HIF)2α, promotes NAFLD progression by repressing genes involved in fatty acid β-oxidation through unclear mechanisms. Therefore, we assessed the precise mechanism by which HIF2α promotes fatty liver and its physiological relevance in metabolic homeostasis. METHODS Primary hepatocytes from VHL (VhlΔHep) and PPARα (Ppara-null) knockout mice that were loaded with fatty acids, murine dietary protocols to induce hepatic steatosis, and fasting-refeeding dietary regimen approaches were used to test our hypothesis. RESULTS Inhibiting autophagy using chloroquine did not decrease lipid contents in VhlΔHep primary hepatocytes. Inhibition of ERK using MEK inhibitor decreased lipid contents in primary hepatocytes from a genetic model of constitutive HIF activation and primary hepatocytes loaded with free fatty acids. Moreover, MEK-ERK inhibition potentiated ligand-dependent activation of PPARα. We also show that MEK-ERK inhibition improved diet-induced hepatic steatosis, which is associated with the induction of PPARα target genes. During fasting, fatty acid β-oxidation is induced by PPARα, and refeeding inhibits β-oxidation. Our data show that ERK is involved in the post-prandial repression of hepatic PPARα signaling. CONCLUSIONS Overall, our results demonstrate that ERK activated by hypoxia signaling plays a crucial role in fatty acid β-oxidation genes by repressing hepatocyte PPARα signaling.
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Affiliation(s)
- Raja Gopal Reddy Mooli
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jessica Rodriguez
- Department of Molecular and Integrative Physiology, Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Shogo Takahashi
- Departments of Biochemistry and Molecular and Cellular Biology, Georgetown University, Washington, District of Columbia; National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Sumeet Solanki
- Department of Molecular and Integrative Physiology, Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Frank J Gonzalez
- National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Sadeesh K Ramakrishnan
- Division of Endocrinology and Metabolism, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania; Department of Molecular and Integrative Physiology, Internal Medicine, University of Michigan, Ann Arbor, Michigan.
| | - Yatrik M Shah
- Department of Molecular and Integrative Physiology, Internal Medicine, University of Michigan, Ann Arbor, Michigan.
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McKenna M, Balasuriya N, Zhong S, Li SSC, O'Donoghue P. Phospho-Form Specific Substrates of Protein Kinase B (AKT1). Front Bioeng Biotechnol 2021; 8:619252. [PMID: 33614606 PMCID: PMC7886700 DOI: 10.3389/fbioe.2020.619252] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 12/29/2020] [Indexed: 11/17/2022] Open
Abstract
Protein kinase B (AKT1) is hyper-activated in diverse human tumors. AKT1 is activated by phosphorylation at two key regulatory sites, Thr308 and Ser473. Active AKT1 phosphorylates many, perhaps hundreds, of downstream cellular targets in the cytosol and nucleus. AKT1 is well-known for phosphorylating proteins that regulate cell survival and apoptosis, however, the full catalog of AKT1 substrates remains unknown. Using peptide arrays, we recently discovered that each phosphorylated form of AKT1 (pAKT1S473, pAKT1T308, and ppAKT1S473,T308) has a distinct substrate specificity, and these data were used to predict potential new AKT1 substrates. To test the high-confidence predictions, we synthesized target peptides representing putative AKT1 substrates. Peptides substrates were synthesized by solid phase synthesis and their purity was confirmed by mass spectrometry. Most of the predicted peptides showed phosphate accepting activity similar to or greater than that observed with a peptide derived from a well-established AKT1 substrate, glycogen synthase kinase 3β (GSK-3β). Among the novel substrates, AKT1 was most active with peptides representing PIP3-binding protein Rab11 family-interacting protein 2 and cysteinyl leukotriene receptor 1, indicating their potential role in AKT1-dependent cellular signaling. The ppAKT1S473,T308 enzyme was highly selective for peptides containing a patch of basic residues at −5, −4, −3 and aromatic residues (Phe/Tyr) at +1 positions from the phosphorylation site. The pAKT1S473 variant preferred more acidic peptides, Ser or Pro at +4, and was agnostic to the residue at −5. The data further support our hypothesis that Ser473 phosphorylation plays a key role in modulating AKT1 substrate selectivity.
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Affiliation(s)
- McShane McKenna
- Department of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - Nileeka Balasuriya
- Department of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - Shanshan Zhong
- Department of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - Shawn Shun-Cheng Li
- Department of Biochemistry, The University of Western Ontario, London, ON, Canada
| | - Patrick O'Donoghue
- Department of Biochemistry, The University of Western Ontario, London, ON, Canada.,Department of Chemistry, The University of Western Ontario, London, ON, Canada
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22
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Akil A, Gutiérrez-García AK, Guenter R, Rose JB, Beck AW, Chen H, Ren B. Notch Signaling in Vascular Endothelial Cells, Angiogenesis, and Tumor Progression: An Update and Prospective. Front Cell Dev Biol 2021; 9:642352. [PMID: 33681228 PMCID: PMC7928398 DOI: 10.3389/fcell.2021.642352] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 01/19/2021] [Indexed: 12/12/2022] Open
Abstract
The Notch signaling pathway plays an essential role in a wide variety of biological processes including cell fate determination of vascular endothelial cells and the regulation of arterial differentiation and angiogenesis. The Notch pathway is also an essential regulator of tumor growth and survival by functioning as either an oncogene or a tumor suppressor in a context-dependent manner. Crosstalk between the Notch and other signaling pathways is also pivotal in tumor progression by promoting cancer cell growth, migration, invasion, metastasis, tumor angiogenesis, and the expansion of cancer stem cells (CSCs). In this review, we provide an overview and update of Notch signaling in endothelial cell fate determination and functioning, angiogenesis, and tumor progression, particularly in the development of CSCs and therapeutic resistance. We further summarize recent studies on how endothelial signaling crosstalk with the Notch pathway contributes to tumor angiogenesis and the development of CSCs, thereby providing insights into vascular biology within the tumor microenvironment and tumor progression.
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Affiliation(s)
- Abdellah Akil
- Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Ana K. Gutiérrez-García
- Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Rachael Guenter
- Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - J. Bart Rose
- Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- O’Neal Comprehensive Cancer Center, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Adam W. Beck
- Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Herbert Chen
- Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- O’Neal Comprehensive Cancer Center, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Bin Ren
- Department of Surgery, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- O’Neal Comprehensive Cancer Center, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
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23
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Balaji Ragunathrao VA, Anwar M, Akhter MZ, Chavez A, Mao DY, Natarajan V, Lakshmikanthan S, Chrzanowska-Wodnicka M, Dudek AZ, Claesson-Welsh L, Kitajewski JK, Wary KK, Malik AB, Mehta D. Sphingosine-1-Phosphate Receptor 1 Activity Promotes Tumor Growth by Amplifying VEGF-VEGFR2 Angiogenic Signaling. Cell Rep 2020; 29:3472-3487.e4. [PMID: 31825830 PMCID: PMC6927555 DOI: 10.1016/j.celrep.2019.11.036] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 09/06/2019] [Accepted: 11/07/2019] [Indexed: 12/24/2022] Open
Abstract
The vascular endothelial growth factor-A (VEGF-A)-VEGFR2 pathway drives tumor vascularization by activating proangiogenic signaling in endothelial cells (ECs). Here, we show that EC-sphingosine-1-phosphate receptor 1 (S1PR1) amplifies VEGFR2-mediated angiogenic signaling to enhance tumor growth. We show that cancer cells induce S1PR1 activity in ECs, and thereby, conditional deletion of S1PR1 in ECs (EC-S1pr1−/− mice) impairs tumor vascularization and growth. Mechanistically, we show that S1PR1 engages the heterotrimeric G-protein Gi, which amplifies VEGF-VEGFR2 signaling due to an increase in the activity of the tyrosine kinase c-Abl1. c-Abl1, by phosphorylating VEGFR2 at tyrosine-951, prolongs VEGFR2 retention on the plasmalemma to sustain Rac1 activity and EC migration. Thus, S1PR1 or VEGFR2 antagonists, alone or in combination, reverse the tumor growth in control mice to the level seen in EC-S1pr1−/− mice. Our findings suggest that blocking S1PR1 activity in ECs has the potential to suppress tumor growth by preventing amplification of VEGF-VEGFR2 signaling. Vijay Avin et al. demonstrate an essential role of endothelial cell (EC)-S1PR1 signaling in amplifying VEGFR2-mediated tumor growth. S1PR1 by Gi and c-Abl1 phosphorylates VEGFR2 at Y951, which retains VEGFR2 at EC plasmalemma, thus enabling EC migration, tumor angiogenesis, and growth.
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Affiliation(s)
- Vijay Avin Balaji Ragunathrao
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Mumtaz Anwar
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Md Zahid Akhter
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Alejandra Chavez
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - De Yu Mao
- Department of Physiology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Viswanathan Natarajan
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA; Department of Medicine, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | | | - Arkadiusz Z Dudek
- Department of Medicine, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Lena Claesson-Welsh
- Department of Immunology, Genetics and Pathology, Rudbeck Laboratory, Science for Life Laboratory, Uppsala University, 751 85 Uppsala, Sweden
| | - Jan K Kitajewski
- Department of Physiology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Kishore K Wary
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Asrar B Malik
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Dolly Mehta
- Department of Pharmacology and The Center for Lung and Vascular Biology, The University of Illinois College of Medicine, Chicago, IL 60612, USA.
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Liu F, Yao Z, Lü P, Jiao QB, Liu Q, Wu HX, You Y, Minamisawa S. Pathophysiologic Role of Molecules Determining Arteriovenous Differentiation in Adult Life. J Vasc Res 2020; 57:245-253. [PMID: 32535603 DOI: 10.1159/000507627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 03/26/2020] [Indexed: 11/19/2022] Open
Abstract
The structural differences between arteries and veins are genetically predetermined. Vascular identity markers, the molecular markers specific to veins and arteries, determine the differential development of vessels during embryogenesis and their expression persists in adult vessels. It is revealed that they can be reactivated under various pathophysiologic conditions even after vessel differentiation. Thus, once considered as quiescent in adults, vascular identity markers may actually play significant roles in vascular remodeling. Manipulation of vascular identity and the underlying molecular mechanisms might be a novel strategy to improve vascular remodeling for clinical application.
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Affiliation(s)
- Fang Liu
- Nuclear Medicine Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhong Yao
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Ping Lü
- Vascular Surgery Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China,
| | - Qi-Bin Jiao
- Department of Cardiology, The Affiliated Hospital of Hangzhou Normal University, Institute of Ageing Research, School of Medicine, Hangzhou Normal University, Hangzhou, China
| | - Qin Liu
- Vascular Surgery Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hong-Xiao Wu
- Vascular Surgery Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yun You
- Vascular Surgery Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Susumu Minamisawa
- Department of Cell Physiology, The Jikei University School of Medicine, Tokyo, Japan
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Jennings W, Epand RM. CDP-diacylglycerol, a critical intermediate in lipid metabolism. Chem Phys Lipids 2020; 230:104914. [PMID: 32360136 DOI: 10.1016/j.chemphyslip.2020.104914] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 04/01/2020] [Accepted: 04/13/2020] [Indexed: 12/13/2022]
Abstract
The roles of lipids expand beyond the basic building blocks of biological membranes. In addition to forming complex and dynamic barriers, the thousands of different lipid species in the cell contribute to essentially all the processes of life. Specific lipids are increasingly identified in cellular processes, including signal transduction, membrane trafficking, metabolic control and protein regulation. Tight control of their synthesis and degradation is essential for homeostasis. Most of the lipid molecules in the cell originate from a small number of critical intermediates. Thus, regulating the synthesis of intermediates is essential for lipid homeostasis and optimal biological functions. Cytidine diphosphate diacylglycerol (CDP-DAG) is an intermediate which occupies a branch point in lipid metabolism. CDP-DAG is incorporated into different synthetic pathways to form distinct phospholipid end-products depending on its location of synthesis. Identification and characterization of CDP-DAG synthases which catalyze the synthesis of CDP-DAG has been hampered by difficulties extracting these membrane-bound enzymes for purification. Recent developments have clarified the cellular localization of the CDP-DAG synthases and identified a new unrelated CDP-DAG synthase enzyme. These findings have contributed to a deeper understanding of the extensive synthetic and signaling networks stemming from this key lipid intermediate.
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Affiliation(s)
- William Jennings
- Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada
| | - Richard M Epand
- Department of Biochemistry and Biomedical Sciences, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada.
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26
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Nuclear Inositides and Inositide-Dependent Signaling Pathways in Myelodysplastic Syndromes. Cells 2020; 9:cells9030697. [PMID: 32178280 PMCID: PMC7140618 DOI: 10.3390/cells9030697] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/04/2020] [Accepted: 03/11/2020] [Indexed: 12/21/2022] Open
Abstract
Myelodysplastic syndromes (MDS) are a heterogeneous group of hematological malignancies characterized by peripheral blood cytopenia and abnormal myeloproliferation, as well as a variable risk of evolution into acute myeloid leukemia (AML). The nucleus is a highly organized organelle with several distinct domains where nuclear inositides localize to mediate essential cellular events. Nuclear inositides play a critical role in the modulation of erythropoiesis or myelopoiesis. Here, we briefly review the nuclear structure, the localization of inositides and their metabolic enzymes in subnuclear compartments, and the molecular aspects of nuclear inositides in MDS.
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27
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Anti-angiogenic effects of VEGF stimulation on endothelium deficient in phosphoinositide recycling. Nat Commun 2020; 11:1204. [PMID: 32139674 PMCID: PMC7058007 DOI: 10.1038/s41467-020-14956-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 02/08/2020] [Indexed: 01/09/2023] Open
Abstract
Anti-angiogenic therapies have generated significant interest for their potential to combat tumor growth. However, tumor overproduction of pro-angiogenic ligands can overcome these therapies, hampering success of this approach. To circumvent this problem, we target the resynthesis of phosphoinositides consumed during intracellular transduction of pro-angiogenic signals in endothelial cells (EC), thus harnessing the tumor’s own production of excess stimulatory ligands to deplete adjacent ECs of the capacity to respond to these signals. Using zebrafish and human endothelial cells in vitro, we show ECs deficient in CDP-diacylglycerol synthase 2 are uniquely sensitive to increased vascular endothelial growth factor (VEGF) stimulation due to a reduced capacity to re-synthesize phosphoinositides, including phosphatidylinositol-(4,5)-bisphosphate (PIP2), resulting in VEGF-exacerbated defects in angiogenesis and angiogenic signaling. Using murine tumor allograft models, we show that systemic or EC specific suppression of phosphoinositide recycling results in reduced tumor growth and tumor angiogenesis. Our results suggest inhibition of phosphoinositide recycling provides a useful anti-angiogenic approach. Tumors can overproduce pro-angiogenic ligands overcoming currently approved anti-angiogenic therapies and hindering their success. Here, the authors show that targeting phosphoinositide recycling during tumor angiogenesis harnesses the tumor’s own production of angiogenic ligands to deplete adjacent endothelial cells of the capacity to respond to these signals.
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28
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Bubb KJ, Aubdool AA, Moyes AJ, Lewis S, Drayton JP, Tang O, Mehta V, Zachary IC, Abraham DJ, Tsui J, Hobbs AJ. Endothelial C-Type Natriuretic Peptide Is a Critical Regulator of Angiogenesis and Vascular Remodeling. Circulation 2019; 139:1612-1628. [PMID: 30586761 DOI: 10.1161/circulationaha.118.036344] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Angiogenesis and vascular remodeling are complementary, innate responses to ischemic cardiovascular events, including peripheral artery disease and myocardial infarction, which restore tissue blood supply and oxygenation; the endothelium plays a critical function in these intrinsic protective processes. C-type natriuretic peptide (CNP) is a fundamental endothelial signaling species that coordinates vascular homeostasis. Herein, we sought to delineate a central role for CNP in angiogenesis and vascular remodeling in response to ischemia. METHODS The in vitro angiogenic capacity of CNP was examined in pulmonary microvascular endothelial cells and aortic rings isolated from wild-type, endothelium-specific CNP-/-, global natriuretic peptide receptor (NPR)-B-/- and NPR-C-/- animals, and human umbilical vein endothelial cells. These studies were complemented by in vivo investigation of neovascularization and vascular remodeling after ischemia or vessel injury, and CNP/NPR-C expression and localization in tissue from patients with peripheral artery disease. RESULTS Clinical vascular ischemia is associated with reduced levels of CNP and its cognate NPR-C. Moreover, genetic or pharmacological inhibition of CNP and NPR-C, but not NPR-B, reduces the angiogenic potential of pulmonary microvascular endothelial cells, human umbilical vein endothelial cells, and isolated vessels ex vivo. Angiogenesis and remodeling are impaired in vivo in endothelium-specific CNP-/- and NPR-C-/-, but not NPR-B-/-, mice; the detrimental phenotype caused by genetic deletion of endothelial CNP, but not NPR-C, can be rescued by pharmacological administration of CNP. The proangiogenic effect of CNP/NPR-C is dependent on activation of Gi, ERK1/2, and phosphoinositide 3-kinase γ/Akt at a molecular level. CONCLUSIONS These data define a central (patho)physiological role for CNP in angiogenesis and vascular remodeling in response to ischemia and provide the rationale for pharmacological activation of NPR-C as an innovative approach to treating peripheral artery disease and ischemic cardiovascular disorders.
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Affiliation(s)
- Kristen J Bubb
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, UK (K.J.B., A.A.A., A.J.M., J.P.D., A.J.H.).,University of Sydney, Kolling Institute of Medical Research, St Leonards, Australia (K.J.B., O.T.)
| | - Aisah A Aubdool
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, UK (K.J.B., A.A.A., A.J.M., J.P.D., A.J.H.)
| | - Amie J Moyes
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, UK (K.J.B., A.A.A., A.J.M., J.P.D., A.J.H.)
| | - Sarah Lewis
- Centre for Rheumatology and Connective Tissue Diseases, University College London Medical School, Royal Free Campus, UK (S.L., D.J.A., J.T.)
| | - Jonathan P Drayton
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, UK (K.J.B., A.A.A., A.J.M., J.P.D., A.J.H.)
| | - Owen Tang
- University of Sydney, Kolling Institute of Medical Research, St Leonards, Australia (K.J.B., O.T.)
| | - Vedanta Mehta
- Centre for Cardiovascular Biology and Medicine, Division of Medicine, University College London, UK (V.M., I.C.Z.)
| | - Ian C Zachary
- Centre for Cardiovascular Biology and Medicine, Division of Medicine, University College London, UK (V.M., I.C.Z.)
| | - David J Abraham
- Centre for Rheumatology and Connective Tissue Diseases, University College London Medical School, Royal Free Campus, UK (S.L., D.J.A., J.T.)
| | - Janice Tsui
- Centre for Rheumatology and Connective Tissue Diseases, University College London Medical School, Royal Free Campus, UK (S.L., D.J.A., J.T.)
| | - Adrian J Hobbs
- William Harvey Research Institute, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, UK (K.J.B., A.A.A., A.J.M., J.P.D., A.J.H.)
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Isoform-Specific Roles of ERK1 and ERK2 in Arteriogenesis. Cells 2019; 9:cells9010038. [PMID: 31877781 PMCID: PMC7017123 DOI: 10.3390/cells9010038] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/10/2019] [Accepted: 12/18/2019] [Indexed: 12/14/2022] Open
Abstract
Despite the clinical importance of arteriogenesis, this biological process is poorly understood. ERK1 and ERK2 are key components of a major intracellular signaling pathway activated by vascular endothelial growth (VEGF) and FGF2, growth factors critical to arteriogenesis. To investigate the specific role of each ERK isoform in arteriogenesis, we used mice with a global Erk1 knockout as well as Erk1 and Erk2 floxed mice to delete Erk1 or Erk2 in endothelial cells, macrophages, and smooth muscle cells. We found that ERK1 controls macrophage infiltration following an ischemic event. Loss of ERK1 in endothelial cells and macrophages induced an excessive macrophage infiltration leading to an increased but poorly functional arteriogenesis. Loss of ERK2 in endothelial cells leads to a decreased arteriogenesis due to decreased endothelial cell proliferation and a reduced eNOS expression. These findings show for the first time that isoform-specific roles of ERK1 and ERK2 in the control of arteriogenesis.
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30
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Kobialka P, Graupera M. Revisiting PI3-kinase signalling in angiogenesis. VASCULAR BIOLOGY (BRISTOL, ENGLAND) 2019; 1:H125-H134. [PMID: 32923964 PMCID: PMC7439845 DOI: 10.1530/vb-19-0025] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Accepted: 11/29/2019] [Indexed: 12/12/2022]
Abstract
PI3Ks belong to a family of lipid kinases that comprises eight isoforms. They phosphorylate the third position of the inositol ring present in phosphatidylinositol lipids and, in turn, activate a broad range of proteins. The PI3K pathway regulates primal cellular responses, including proliferation, migration, metabolism and vesicular traffic. These processes are fundamental for endothelial cell function during sprouting angiogenesis, the most common type of blood vessel formation. Research in animal models has revealed key functions of PI3K family members and downstream effectors in angiogenesis. In addition, perturbations in PI3K signalling have been associated with aberrant vascular growth including tumour angiogenesis and vascular malformations. Together, this highlights that endothelial cells are uniquely sensitive to fluctuations in PI3K signalling. Here, we aim to update the current view on this important signalling cue in physiological and pathological blood vessel growth.
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Affiliation(s)
- Piotr Kobialka
- Vascular Biology and Signalling Group, Program Against Cancer Therapeutic Resistance (ProCURE), Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat-Barcelona, Spain
- ProCure Research Program, Instituto de Salud Carlos III, Madrid, Spain
- OncoBell Program, Instituto de Salud Carlos III, Madrid, Spain
| | - Mariona Graupera
- Vascular Biology and Signalling Group, Program Against Cancer Therapeutic Resistance (ProCURE), Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), L’Hospitalet de Llobregat-Barcelona, Spain
- ProCure Research Program, Instituto de Salud Carlos III, Madrid, Spain
- OncoBell Program, Instituto de Salud Carlos III, Madrid, Spain
- CIBERONC, Instituto de Salud Carlos III, Madrid, Spain
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Ren B, Rose JB, Liu Y, Jaskular-Sztul R, Contreras C, Beck A, Chen H. Heterogeneity of Vascular Endothelial Cells, De Novo Arteriogenesis and Therapeutic Implications in Pancreatic Neuroendocrine Tumors. J Clin Med 2019; 8:jcm8111980. [PMID: 31739580 PMCID: PMC6912347 DOI: 10.3390/jcm8111980] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 11/08/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023] Open
Abstract
Arteriogenesis supplies oxygen and nutrients in the tumor microenvironment (TME), which may play an important role in tumor growth and metastasis. Pancreatic neuroendocrine tumors (pNETs) are the second most common pancreatic malignancy and are frequently metastatic on presentation. Nearly a third of pNETs secrete bioactive substances causing debilitating symptoms. Current treatment options for metastatic pNETs are limited. Importantly, these tumors are highly vascularized and heterogeneous neoplasms, in which the heterogeneity of vascular endothelial cells (ECs) and de novo arteriogenesis may be critical for their progression. Current anti-angiogenetic targeted treatments have not shown substantial clinical benefits, and they are poorly tolerated. This review article describes EC heterogeneity and heterogeneous tumor-associated ECs (TAECs) in the TME and emphasizes the concept of de novo arteriogenesis in the TME. The authors also emphasize the challenges of current antiangiogenic therapy in pNETs and discuss the potential of tumor arteriogenesis as a novel therapeutic target. Finally, the authors prospect the clinical potential of targeting the FoxO1-CD36-Notch pathway that is associated with both pNET progression and arteriogenesis and provide insights into the clinical implications of targeting plasticity of cancer stem cells (CSCs) and vascular niche, particularly the arteriolar niche within the TME in pNETs, which will also provide insights into other types of cancer, including breast cancer, lung cancer, and malignant melanoma.
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Affiliation(s)
- Bin Ren
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (J.B.R.); (R.J.-S.); (C.C.); (A.B.); (H.C.)
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Nutrition & Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Diabetes Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Graduate Biomedical Science Program of the Graduate School, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Correspondence:
| | - J. Bart Rose
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (J.B.R.); (R.J.-S.); (C.C.); (A.B.); (H.C.)
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Yehe Liu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA;
| | - Renata Jaskular-Sztul
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (J.B.R.); (R.J.-S.); (C.C.); (A.B.); (H.C.)
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Carlo Contreras
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (J.B.R.); (R.J.-S.); (C.C.); (A.B.); (H.C.)
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Adam Beck
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (J.B.R.); (R.J.-S.); (C.C.); (A.B.); (H.C.)
| | - Herbert Chen
- Department of Surgery, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (J.B.R.); (R.J.-S.); (C.C.); (A.B.); (H.C.)
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Graduate Biomedical Science Program of the Graduate School, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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32
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The protein tyrosine phosphatase PTPRJ/DEP-1 contributes to the regulation of the Notch-signaling pathway and sprouting angiogenesis. Angiogenesis 2019; 23:145-157. [DOI: 10.1007/s10456-019-09683-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 09/23/2019] [Indexed: 12/15/2022]
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Regulation of VEGFR2 trafficking and signaling by Rab GTPase-activating proteins. Sci Rep 2019; 9:13342. [PMID: 31527750 PMCID: PMC6746989 DOI: 10.1038/s41598-019-49646-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 08/29/2019] [Indexed: 12/19/2022] Open
Abstract
Vascular endothelial growth factor receptor-2 (VEGFR2) and its ligands (VEGFs) are crucial players in vasculogenesis and angiogenesis. General blocking of this signaling system with antibodies or small molecule inhibitors is an established strategy to treat cancer and age-related macular degeneration. Nevertheless, the activated receptor can signal to discrete downstream signaling pathways and the equilibrium between these pathways is modulated by coreceptors and distinct isoforms of VEGF. Here we investigated the influence of Rab GTPase activating proteins (RabGAPs) on VEGFR2 signaling, tube formation, and migration of endothelial cells. We demonstrate that members of the TBC1D10 subfamily of RabGAPs have opposite effects. Whereas TBC1D10A leads to increased Erk1/2 signaling, TBC1D10B lowered Erk1/2 and p38 signaling and reduced tube formation in vitro. TBC1D10A is a RabGAP acting on RAB13 that was shown before to play a role in angiogenesis and we could indeed show colocalization of these two proteins with VEGFR2 in activated cells. In addition, we observed that cells expressing TBC1D10B show lower expression of VEGFR2 and NRP1 on filopodia of activated cells. Taken together, our systematic analysis of influence of RabGAPs on VEGFR2 signaling identifies the TBC1D10 subfamily members as modulators of angiogenesis.
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Zhang Z, Hebert AS, Westphall MS, Coon JJ, Dovichi NJ. Single-Shot Capillary Zone Electrophoresis-Tandem Mass Spectrometry Produces over 4400 Phosphopeptide Identifications from a 220 ng Sample. J Proteome Res 2019; 18:3166-3173. [PMID: 31180221 DOI: 10.1021/acs.jproteome.9b00244] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The dependence of capillary zone electrophoresis (CZE) separations on the charge state of the analyte is useful for the analysis of many post-translational modifications in proteins. In this work, we coupled CZE to an Orbitrap Fusion Lumos Tribrid platform with an advanced peak determination algorithm for phosphoproteomics analysis. A linear-polyacrylamide-coated capillary with very low electroosmotic flow was used for the separation. The optimal injection volume was between 100 and 150 nL of a solution of phosphopeptides in 30 mM ammonium bicarbonate (pH 8.2) buffer, which produces a dynamic pH junction sample injection. Larger injection volumes resulted in serious peak broadening and decreased numbers of phosphopeptide identifications. The optimized system identified 4405 phosphopeptides from 220 ng of enriched phosphopeptides from mouse brain, which represents the state-of-the-art result for single-shot CZE-ESI-MS/MS-based phosphoproteome analysis. We found that the migration time for phosphopeptides is much longer than that for non-phosphopeptides and increased along with the number of phosphorylation sites on the peptides, as expected for the additional negative charges associated with the phosphate groups. We also investigated the phosphorylation site motifs; a number of motifs appeared in the CZE-ESI-MS/MS data but not in LC-ESI-MS/MS data, which suggested the complementary performance of the techniques. The data are available via ProteomeXchange with identifier PXD012888.
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Affiliation(s)
- Zhenbin Zhang
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Alexander S Hebert
- Genome Center of Wisconsin and Departments of Chemistry and Biomolecular Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Michael S Westphall
- Genome Center of Wisconsin and Departments of Chemistry and Biomolecular Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Joshua J Coon
- Genome Center of Wisconsin and Departments of Chemistry and Biomolecular Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Norman J Dovichi
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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Carretero-Ortega J, Chhangawala Z, Hunt S, Narvaez C, Menéndez-González J, Gay CM, Zygmunt T, Li X, Torres-Vázquez J. GIPC proteins negatively modulate Plexind1 signaling during vascular development. eLife 2019; 8:e30454. [PMID: 31050647 PMCID: PMC6499541 DOI: 10.7554/elife.30454] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 04/15/2019] [Indexed: 12/18/2022] Open
Abstract
Semaphorins (SEMAs) and their Plexin (PLXN) receptors are central regulators of metazoan cellular communication. SEMA-PLXND1 signaling plays important roles in cardiovascular, nervous, and immune system development, and cancer biology. However, little is known about the molecular mechanisms that modulate SEMA-PLXND1 signaling. As PLXND1 associates with GIPC family endocytic adaptors, we evaluated the requirement for the molecular determinants of their association and PLXND1's vascular role. Zebrafish that endogenously express a Plxnd1 receptor with a predicted impairment in GIPC binding exhibit low penetrance angiogenesis deficits and antiangiogenic drug hypersensitivity. Moreover, gipc mutant fish show angiogenic impairments that are ameliorated by reducing Plxnd1 signaling. Finally, GIPC depletion potentiates SEMA-PLXND1 signaling in cultured endothelial cells. These findings expand the vascular roles of GIPCs beyond those of the Vascular Endothelial Growth Factor (VEGF)-dependent, proangiogenic GIPC1-Neuropilin 1 complex, recasting GIPCs as negative modulators of antiangiogenic PLXND1 signaling and suggest that PLXND1 trafficking shapes vascular development.
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Affiliation(s)
- Jorge Carretero-Ortega
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
| | - Zinal Chhangawala
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
| | - Shane Hunt
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
| | - Carlos Narvaez
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
| | - Javier Menéndez-González
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
| | - Carl M Gay
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
| | - Tomasz Zygmunt
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
| | - Xiaochun Li
- Department of Population HealthNew York University School of MedicineNew YorkUnited States
| | - Jesús Torres-Vázquez
- Department of Cell Biology, Skirball Institute of Biomolecular MedicineNew York University Langone Medical CenterNew YorkUnited States
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Wang L, Feng Y, Xie X, Wu H, Su XN, Qi J, Xin W, Gao L, Zhang Y, Shah VH, Zhu Q. Neuropilin-1 aggravates liver cirrhosis by promoting angiogenesis via VEGFR2-dependent PI3K/Akt pathway in hepatic sinusoidal endothelial cells. EBioMedicine 2019; 43:525-536. [PMID: 31060904 PMCID: PMC6558257 DOI: 10.1016/j.ebiom.2019.04.050] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/26/2019] [Accepted: 04/26/2019] [Indexed: 02/07/2023] Open
Abstract
Background We have revealed that neuropilin-1 (NRP-1) promoted hepatic stellate cell activation and liver fibrosis through its profibrogenic signalling pathways. However, the role of NRP-1 in angiogenesis in hepatic sinusoidal endothelial cells (HSECs) during liver cirrhosis remains unclear. Methods The correlation between NRP-1 expression and angiogenesis was evaluated in both human and murine cirrhotic liver tissues by immunohistochemical staining, quantitative real-time PCR, and western blotting. In addition, the role and mechanism of NRP-1 in regulating VEGFR2-dependent angiogenesis was identified in endothelial cells (ECs) in vitro. Moreover, liver histocultures were used to test the therapeutic effect of NRP-1 blocking in liver fibrosis. Findings Higher expression of NRP-1 in HSECs was detected, which was positively correlated with angiogenesis in liver cirrhosis. In vitro, NRP-1 knockdown suppressed the expression and activation of VEGFR2, accompanied by reduced ability of the vascular tube formation and the migration of ECs. Conversely, NRP-1 overexpression upregulated VEGFR2, promoted tube formation, and the migration of ECs. Mechanistically, NRP-1 modulated the expression of VEGFR2 by regulating FAK and its kinase activity. Furthermore, NRP-1 promoted VEGFR2-dependent angiogenesis via the PI3K/Akt pathway in HSECs. Blocking NRP-1 function reduced intrahepatic angiogenesis and fibrosis-associated factors in the in vitro liver histocultures. Interpretation NRP-1 promotes angiogenesis by upregulating the expression and activation of VEGFR2 through the PI3K/Akt signalling pathway in liver cirrhosis. This study highlights the possibility of therapeutically targeting NRP-1 for the treatment of cirrhosis. Fund National Natural Science Foundation of China (No. 81570551; 81770607; 81600469; 81401868), Key Research project of Shandong Province (No. 2016GSF201008; 2017GSF218053), Natural Science Foundation of Shandong Province (No. ZR2017MH102), National Science and Technology Major Project of China (No. 2018ZX10302206-001-006).
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Affiliation(s)
- Le Wang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, Shandong Province, China
| | - Yuemin Feng
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, Shandong Province, China
| | - Xiaoyu Xie
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, Shandong Province, China
| | - Hao Wu
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, Shandong Province, China
| | - Xiao Nan Su
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, Shandong Province, China
| | - Jianni Qi
- Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, Shandong Province, China; Department of Central Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, China
| | - Wei Xin
- Department of Central Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong Province, China
| | - Lifen Gao
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory for Infection and Immunity of Shandong Province, Department of Immunology School of Basic Medicine, Shandong University, Jinan, Shandong Province, China
| | - Ying Zhang
- Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Vijay H Shah
- Gastroenterology Research Unit, Mayo Clinic and Foundation, Rochester, MN, USA
| | - Qiang Zhu
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, Shandong Province, China.
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Developing zebrafish disease models for in vivo small molecule screens. Curr Opin Chem Biol 2019; 50:37-44. [PMID: 30928773 DOI: 10.1016/j.cbpa.2019.02.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 01/31/2019] [Accepted: 02/06/2019] [Indexed: 12/28/2022]
Abstract
The zebrafish is a model organism that allows in vivo studies to be performed at a scale usually restricted to in vitro studies. As such, the zebrafish is well suited to in vivo screens, in which thousands of small molecules are tested for their ability to modify disease phenotypes in zebrafish disease models. Numerous approaches have been developed for modeling human diseases in zebrafish, including mutagenesis, transgenesis, pharmacological approaches, wounding, and exposure to infectious or cancerous agents. We review the various strategies for modeling human diseases in zebrafish and discuss important considerations when developing zebrafish models for use in in vivo small molecule screens.
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Hong Q, Zhang L, Fu J, Verghese DA, Chauhan K, Nadkarni GN, Li Z, Ju W, Kretzler M, Cai GY, Chen XM, D'Agati VD, Coca SG, Schlondorff D, He JC, Lee K. LRG1 Promotes Diabetic Kidney Disease Progression by Enhancing TGF- β-Induced Angiogenesis. J Am Soc Nephrol 2019; 30:546-562. [PMID: 30858225 DOI: 10.1681/asn.2018060599] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 01/28/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Glomerular endothelial dysfunction and neoangiogenesis have long been implicated in the pathogenesis of diabetic kidney disease (DKD). However, the specific molecular pathways contributing to these processes in the early stages of DKD are not well understood. Our recent transcriptomic profiling of glomerular endothelial cells identified a number of proangiogenic genes that were upregulated in diabetic mice, including leucine-rich α-2-glycoprotein 1 (LRG1). LRG1 was previously shown to promote neovascularization in mouse models of ocular disease by potentiating endothelial TGF-β/activin receptor-like kinase 1 (ALK1) signaling. However, LRG1's role in the kidney, particularly in the setting of DKD, has been unclear. METHODS We analyzed expression of LRG1 mRNA in glomeruli of diabetic kidneys and assessed its localization by RNA in situ hybridization. We examined the effects of genetic ablation of Lrg1 on DKD progression in unilaterally nephrectomized, streptozotocin-induced diabetic mice at 12 and 20 weeks after diabetes induction. We also assessed whether plasma LRG1 was associated with renal outcome in patients with type 2 diabetes. RESULTS LRG1 localized predominantly to glomerular endothelial cells, and its expression was elevated in the diabetic kidneys. LRG1 ablation markedly attenuated diabetes-induced glomerular angiogenesis, podocyte loss, and the development of diabetic glomerulopathy. These improvements were associated with reduced ALK1-Smad1/5/8 activation in glomeruli of diabetic mice. Moreover, increased plasma LRG1 was associated with worse renal outcome in patients with type 2 diabetes. CONCLUSIONS These findings identify LRG1 as a potential novel pathogenic mediator of diabetic glomerular neoangiogenesis and a risk factor in DKD progression.
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Affiliation(s)
- Quan Hong
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York.,Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center of Kidney Diseases, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, Beijing, China
| | - Lu Zhang
- Department of Nephrology, The First Affiliated Hospital of Xiamen University, Xiamen, China.,Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Jia Fu
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Divya A Verghese
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Kinsuk Chauhan
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Girish N Nadkarni
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Zhengzhe Li
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Wenjun Ju
- Division of Nephrology, University of Michigan, Ann Arbor, Michigan
| | | | - Guang-Yan Cai
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center of Kidney Diseases, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, Beijing, China
| | - Xiang-Mei Chen
- Department of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center of Kidney Diseases, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, Beijing, China
| | - Vivette D D'Agati
- Department of Pathology, Columbia University Medical Center, New York, New York; and
| | - Steven G Coca
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Detlef Schlondorff
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York
| | - John C He
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York; .,Renal Section, James J. Peters Veterans Affair Medical Center, Bronx, New York
| | - Kyung Lee
- Division of Nephrology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, New York;
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Zhao Y, Zhang K, Sips P, MacRae CA. Screening drugs for myocardial disease in vivo with zebrafish: an expert update. Expert Opin Drug Discov 2019; 14:343-353. [PMID: 30836799 DOI: 10.1080/17460441.2019.1577815] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Our understanding of the complexity of cardiovascular disease pathophysiology remains very incomplete and has hampered cardiovascular drug development over recent decades. The prevalence of cardiovascular diseases and their increasing global burden call for novel strategies to address disease biology and drug discovery. Areas covered: This review describes the recent history of cardiovascular drug discovery using in vivo phenotype-based screening in zebrafish. The rationale for the use of this model is highlighted and the initial efforts in the fields of disease modeling and high-throughput screening are illustrated. Finally, the advantages and limitations of in vivo zebrafish screening are discussed, highlighting newer approaches, such as genome editing technologies, to accelerate our understanding of disease biology and the development of precise disease models. Expert opinion: Full understanding and faithful modeling of specific cardiovascular disease is a rate-limiting step for cardiovascular drug discovery. The resurgence of in vivo phenotype screening together with the advancement of systems biology approaches allows for the identification of lead compounds which show efficacy on integrative disease biology in the absence of validated targets. This strategy bypasses current gaps in knowledge of disease biology and paves the way for successful drug discovery and downstream molecular target identification.
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Affiliation(s)
- Yanbin Zhao
- a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , China.,b Shanghai Institute of Pollution Control and Ecological Security, Tongji University , Shanghai , China.,c Cardiovascular Medicine , Brigham and Women's Hospital, Harvard Medical School , Boston , MA , USA
| | - Kun Zhang
- a School of Environmental Science and Engineering , Shanghai Jiao Tong University , Shanghai , China.,b Shanghai Institute of Pollution Control and Ecological Security, Tongji University , Shanghai , China.,c Cardiovascular Medicine , Brigham and Women's Hospital, Harvard Medical School , Boston , MA , USA
| | - Patrick Sips
- d Center for Medical Genetics, Department of Biomolecular Medicine , Ghent University , Ghent , Belgium
| | - Calum A MacRae
- c Cardiovascular Medicine , Brigham and Women's Hospital, Harvard Medical School , Boston , MA , USA
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Ferri-Lagneau KF, Haider J, Sang S, Leung T. Rescue of hematopoietic stem/progenitor cells formation in plcg1 zebrafish mutant. Sci Rep 2019; 9:244. [PMID: 30664660 PMCID: PMC6341084 DOI: 10.1038/s41598-018-36338-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 11/19/2018] [Indexed: 12/23/2022] Open
Abstract
Hematopoietic stem/progenitor cells (HSPC) in zebrafish emerge from the aortic hemogenic endothelium (HE) and migrate towards the caudal hematopoietic tissue (CHT), where they expand and differentiate during definitive hematopoiesis. Phospholipase C gamma 1 (Plcγ1) has been implicated for hematopoiesis in vivo and in vitro and is also required to drive arterial and HSPC formation. Genetic mutation in plcg1-/- (y10 allele) completely disrupts the aortic blood flow, specification of arterial fate, and HSPC formation in zebrafish embryos. We previously demonstrated that ginger treatment promoted definitive hematopoiesis via Bmp signaling. In this paper, we focus on HSPC development in plcg1-/- mutants and show that ginger/10-gingerol (10-G) can rescue the expression of arterial and HSPC markers in the HE and CHT in plcg1-/- mutant embryos. We demonstrate that ginger can induce scl/runx1 expression, and that rescued HE fate is dependent on Bmp and Notch. Bmp and Notch are known to regulate nitric oxide (NO) production and NO can induce hematopoietic stem cell fate. We show that ginger produces a robust up-regulation of NO. Taken together, we suggest in this paper that Bmp, Notch and NO are potential players that mediate the effect of ginger/10-G for rescuing the genetic defects in blood vessel specification and HSPC formation in plcg1-/- mutants. Understanding the molecular mechanisms of HSPC development in vivo is critical for understanding HSPC expansion, which will have a positive impact in regenerative medicine.
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Affiliation(s)
- Karine F Ferri-Lagneau
- The Biomedical/Biotechnology Research Institute, North Carolina Central University, North Carolina Research Campus, Nutrition Research Building, Kannapolis, NC, 28081, USA
| | - Jamil Haider
- The Biomedical/Biotechnology Research Institute, North Carolina Central University, North Carolina Research Campus, Nutrition Research Building, Kannapolis, NC, 28081, USA
| | - Shengmin Sang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina A&T State University, North Carolina Research Campus, Nutrition Research Building, Kannapolis, NC, 28081, USA
| | - TinChung Leung
- The Biomedical/Biotechnology Research Institute, North Carolina Central University, North Carolina Research Campus, Nutrition Research Building, Kannapolis, NC, 28081, USA.
- Department of Biological & Biomedical Sciences, North Carolina Central University, Durham, NC, 27707, USA.
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Salybekov AA, Kawaguchi AT, Masuda H, Vorateera K, Okada C, Asahara T. Regeneration-associated cells improve recovery from myocardial infarction through enhanced vasculogenesis, anti-inflammation, and cardiomyogenesis. PLoS One 2018; 13:e0203244. [PMID: 30485279 PMCID: PMC6261405 DOI: 10.1371/journal.pone.0203244] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 10/23/2018] [Indexed: 11/18/2022] Open
Abstract
Background Considering the impaired function of regenerative cells in myocardial infarction (MI) patients with comorbidities and associated risk factors, cell therapy to enhance the regenerative microenvironment was designed using regeneration-associated cells (RACs), including endothelial progenitor cells (EPCs) and anti-inflammatory cells. Methods RACs were prepared by quality and quantity control culture of blood mononuclear cells (QQMNCs). Peripheral blood mononuclear cells (PBMNCs) were isolated from Lewis rats and conditioned for 5 days using a medium containing stem cell factors, thrombopoietin, Flt-3 ligand, vascular endothelial growth factor, and interleukin-6 to generate QQMNCs. Results A 5.3-fold increase in the definitive colony-forming EPCs and vasculogenic EPCs was observed, in comparison to naïve PBMNCs. QQMNCs were enriched with EPCs (28.9-fold, P<0.0019) and M2 macrophages (160.3-fold, P<0.0002). Genes involved in angiogenesis (angpt1, angpt2, and vegfb), stem/progenitors (c-kit and sca-1), and anti-inflammation (arg-1, erg-2, tgfb, and foxp3) were upregulated in QQMNCs. For in vivo experiments, cells were administered into syngeneic rat models of MI. QQMNC-transplanted group (QQ-Tx) preserved cardiac function and fraction shortening 28 days post-MI in comparison with PBMNCs-transplanted (PB-Tx) (P<0.0001) and Control (P<0.0008) groups. QQ-Tx showed enhanced angiogenesis and reduced interstitial left ventricular fibrosis, along with a decrease in neutrophils and an increase in M2 macrophages in the acute phase of MI. Cell tracing studies revealed that intravenously administered QQMNCs preferentially homed to ischemic tissues via blood circulation. QQ-Tx showed markedly upregulated early cardiac transcriptional cofactors (Nkx2-5, 29.8-fold, and Gata-4, 5.2-fold) as well as c-kit (4.5-fold) while these markers were downregulated in PB-Tx. In QQ-Tx animals, de novo blood vessels formed a “Biological Bypass”, observed macroscopically and microscopically, while PB-Tx and Control-Tx groups showed severe fibrotic adhesion to the surrounding tissues, but no epicardial blood vessels. Conclusion QQMNCs conferred potent angiogenic and anti-inflammatory properties to the regenerative microenvironment, enhancing myocardiogenesis and functional recovery of rat MI hearts.
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Affiliation(s)
- Amankeldi A. Salybekov
- Department of Regenerative Medicine Science, Tokai University School of Medicine, Isehara, Japan
| | - Akira T. Kawaguchi
- Department of Regenerative Medicine Science, Tokai University School of Medicine, Isehara, Japan
| | - Haruchika Masuda
- Department of Physiology, Tokai University School of Medicine, Isehara, Japan
| | - Kosit Vorateera
- Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok Noi, Thailand
| | - Chisa Okada
- Teaching and Research Support Core Center, Tokai University School of Medicine, Isehara, Japan
| | - Takayuki Asahara
- Department of Regenerative Medicine Science, Tokai University School of Medicine, Isehara, Japan
- * E-mail:
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Auriau J, Roujeau C, Belaid Choucair Z, Oishi A, Derviaux C, Roux T, Trinquet E, Hermine O, Jockers R, Dam J. Gain of affinity for VEGF165 binding within the VEGFR2/NRP1 cellular complex detected by an HTRF-based binding assay. Biochem Pharmacol 2018; 158:45-59. [PMID: 30236477 DOI: 10.1016/j.bcp.2018.09.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 09/10/2018] [Indexed: 12/11/2022]
Abstract
Neuroplin 1 (NRP1), a transmembrane protein interacting with Vascular Endothelial Growth Factor VEGF-A165 (called here VEGF165) and the tyrosine kinase Receptor 2 (VEGFR2) promote angiogenesis and vascular homeostasis. In a pathophysiological context, several studies suggested that VEGFR2 and NRP1 mediate tumor development and progression. Given the involvement of the VEGF165 network in promoting tumor angiogenesis, NRP1, VEGFR2 and VEGF165 have been identified as targets for anti-angiogenic therapy. No binding assay exists to monitor specifically the binding of VEGF165 to the VEGFR2/NRP1 complex in intact cells. We established a binding assay based on the homogenous time-resolved fluorescence (HTRF®) technology. This unique binding assay enables to assess the interaction of VEGF165 with VEGFR2 or NRP1 within the VEGFR2/NRP1 complex. Ligand binding saturation experiments revealed that VEGF165 binds the VEGFR2/NRP1 complex at the cell surface with a ten to twenty-fold higher affinity compared to SNAP-VEGFR2 or SNAP-NRP1 receptors alone not engaged in the heteromeric complex. The assay allows characterizing the impact of NRP1 ligands on VEGF165 to the complex. It shows high specificity, reproducibility and robustness, making it compatible with high throughput screening (HTS) applications for identifying new VEGF165 antagonists selective for NRP1 or the VEGFR2/NRP1 complex.
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Affiliation(s)
- Johanna Auriau
- Institut Cochin, Inserm U1016, CNRS UMR 8104, University Paris Descartes, University Sorbonne Paris Cité, Paris, France
| | - Clara Roujeau
- Institut Cochin, Inserm U1016, CNRS UMR 8104, University Paris Descartes, University Sorbonne Paris Cité, Paris, France
| | - Zakia Belaid Choucair
- Hôpital Necker, CNRS UMR 8147, Université Paris Descartes, Université Sorbonne Paris Cité, Paris, France And THERANOVIR, Pépinière Genopole Entreprise, Evry, France
| | - Atsuro Oishi
- Institut Cochin, Inserm U1016, CNRS UMR 8104, University Paris Descartes, University Sorbonne Paris Cité, Paris, France
| | - Carine Derviaux
- Institut Cochin, Inserm U1016, CNRS UMR 8104, University Paris Descartes, University Sorbonne Paris Cité, Paris, France
| | - Thomas Roux
- Cisbio Bioassays, Parc Technologique Marcel Boiteux, BP84175, 30200 Codolet, France
| | - Eric Trinquet
- Cisbio Bioassays, Parc Technologique Marcel Boiteux, BP84175, 30200 Codolet, France
| | | | - Ralf Jockers
- Institut Cochin, Inserm U1016, CNRS UMR 8104, University Paris Descartes, University Sorbonne Paris Cité, Paris, France
| | - Julie Dam
- Institut Cochin, Inserm U1016, CNRS UMR 8104, University Paris Descartes, University Sorbonne Paris Cité, Paris, France.
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43
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Ren B. FoxO1 transcriptional activities in VEGF expression and beyond: a key regulator in functional angiogenesis? J Pathol 2018; 245:255-257. [PMID: 29691864 DOI: 10.1002/path.5088] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 04/18/2018] [Indexed: 01/23/2023]
Abstract
FoxO1 has emerged as an important regulator of angiogenesis. Recent work published in this Journal shows that FoxO1 regulates VEGF expression in keratinocytes and is required for angiogenesis in wound healing. Since FoxO1 also regulates CD36 transcription, and endothelial cell differentiation and vascular maturation, this transcription factor may be essential for the formation of functional vascular networks via coupling the regulation of CD36 in vascular endothelial cells under physiological and pathological conditions. Although many outstanding questions remain to be answered, the mechanisms by which FoxO1 regulates VEGF in keratinocytes provide insight into the development of functional angiogenesis and further our understanding of vascular biology. Copyright © 2018 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Bin Ren
- Division of Hematology and Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.,Laboratory of Vascular Pathobiology, Blood Research Institute, Blood Center of Wisconsin, Milwaukee, Wisconsin, USA
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44
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Abstract
The development processes of arteries and veins are fundamentally different, leading to distinct differences in anatomy, structure, and function as well as molecular profiles. Understanding the complex interaction between genetic and epigenetic pathways, as well as extracellular and biomechanical signals that orchestrate arterial venous differentiation, is not only critical for the understanding of vascular diseases of arteries and veins but also valuable for vascular tissue engineering strategies. Recent research has suggested that certain transcriptional factors not only control arterial venous differentiation during development but also play a critical role in adult vessel function and disease processes. This review summarizes the signaling pathways and critical transcription factors that are important for arterial versus venous specification. We focus on those signals that have a direct relation to the structure and function of arteries and veins, and have implications for vascular disease processes and tissue engineering applications.
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Affiliation(s)
- Laura Niklason
- Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, Connecticut 06520, USA.,Departments of Anesthesiology and Biomedical Engineering, Yale University, New Haven, Connecticut 06519, USA
| | - Guohao Dai
- Department of Bioengineering, Northeastern University, Boston, Massachusetts 02115, USA;
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45
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Ribatti D. A new role of mast cells in arteriogenesis. Microvasc Res 2018; 118:57-60. [PMID: 29501537 DOI: 10.1016/j.mvr.2018.02.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/27/2018] [Accepted: 02/27/2018] [Indexed: 02/03/2023]
Abstract
Arteriogenesis is defined as the growth of functional collateral arteries from pre-existing arterio-arteriolar anastomoses. The role of mast cells in arteriogenesis is largely unexplored. Recent evidences suggest that mast cells together with other inflammatory cells, including monocytes-macrophages, lymphocytes, NK cells and endothelial precursor cells (EPCs) may be involved in this process. This review article analyzes the literature concerning this new aspect of biological activity of mast cells.
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Affiliation(s)
- Domenico Ribatti
- Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari Medical School, Bari, Italy; National Cancer Institute "Giovanni Paolo II", Bari, Italy.
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46
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Tsai TC, Shih CC, Chien HP, Yang AH, Lu JK, Lu JH. Anti-apoptotic effects of IGF-I on mortality and dysmorphogenesis in tbx5-deficient zebrafish embryos. BMC DEVELOPMENTAL BIOLOGY 2018; 18:5. [PMID: 29506474 PMCID: PMC5836385 DOI: 10.1186/s12861-017-0161-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 12/05/2017] [Indexed: 01/21/2023]
Abstract
BACKGROUND Tbx5 deficiency in zebrafish causes several abnormal phenotypes of the heart and pectoral fins. It has been reported that exogenous human growth hormone can enhance expression of downstream mediators in the growth hormone and insulin-like growth factor I (IGF-I) pathway and partially restore dysmorphogenesis in tbx5 morphants. This study aimed to further evaluate the effects of IGF-I on cell apoptosis and dysmorphogenesis in zebrafish embryos deficient for tbx5. RESULTS Among the five studied groups of zebrafish embryos (wild-type embryos [WT], tbx5 morphants [MO], mismatched tbx5 morpholino-treated wild-type embryos [MIS], IGF-I-treated wild-type embryos [WTIGF1], and IGF-I-treated tbx5 morphants [MOIGF1]), the expression levels of the ifg1, igf1-ra, ifg-rb, erk1, and akt2 genes as well as the ERK and AKT proteins were significantly reduced in the MO group, but were partially restored in the MOIGF1 group. These expression levels remained normal in the WT, MIS, and WTIGF1 groups. Exogenous human IGF-I also reduced the incidence of phenotypic anomalies, decreased the expression levels of apoptotic genes and proteins, suppressed cell apoptosis, and improved survival of the MOIGF1 group. CONCLUSIONS These results suggest that IGF-I has an anti-apoptotic protective effect in zebrafish embryos with tbx5 deficiency.
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Affiliation(s)
- Tzu-Chun Tsai
- Institutes of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China
| | - Chun-Che Shih
- Institutes of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China.,Departments of Surgery, Pediatrics and Pathology, Veterans General Hospital-Taipei, Taipei, Taiwan, Republic of China
| | - Hsin-Ping Chien
- Laboratory of Molecular Biology, Institute of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, Republic of China
| | - An-Hang Yang
- Institutes of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China.,Departments of Surgery, Pediatrics and Pathology, Veterans General Hospital-Taipei, Taipei, Taiwan, Republic of China
| | - Jenn-Kan Lu
- Laboratory of Molecular Biology, Institute of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan, Republic of China. .,Department of Pediatrics, Veterans General Hospital-Taipei, No. 201, Shih-Pei Rd., Section 2, Beitou, Taipei, 112, Taiwan, Republic of China.
| | - Jen-Her Lu
- Institutes of Clinical Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan, Republic of China. .,Departments of Surgery, Pediatrics and Pathology, Veterans General Hospital-Taipei, Taipei, Taiwan, Republic of China. .,Department of Pediatrics, Veterans General Hospital-Taipei, No. 201, Shih-Pei Rd., Section 2, Beitou, Taipei, 112, Taiwan, Republic of China.
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47
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Lee MY, Gamez-Mendez A, Zhang J, Zhuang Z, Vinyard DJ, Kraehling J, Velazquez H, Brudvig GW, Kyriakides TR, Simons M, Sessa WC. Endothelial Cell Autonomous Role of Akt1: Regulation of Vascular Tone and Ischemia-Induced Arteriogenesis. Arterioscler Thromb Vasc Biol 2018; 38:870-879. [PMID: 29449333 DOI: 10.1161/atvbaha.118.310748] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 01/25/2018] [Indexed: 12/30/2022]
Abstract
OBJECTIVE The importance of PI3K/Akt signaling in the vasculature has been demonstrated in several models, as global loss of Akt1 results in impaired postnatal ischemia- and VEGF-induced angiogenesis. The ubiquitous expression of Akt1, however, raises the possibility of cell-type-dependent Akt1-driven actions, thereby necessitating tissue-specific characterization. APPROACH AND RESULTS Herein, we used an inducible, endothelial-specific Akt1-deleted adult mouse model (Akt1iECKO) to characterize the endothelial cell autonomous functions of Akt1 in the vascular system. Endothelial-targeted ablation of Akt1 reduces eNOS (endothelial nitric oxide synthase) phosphorylation and promotes both increased vascular contractility in isolated vessels and elevated diastolic blood pressures throughout the diurnal cycle in vivo. Furthermore, Akt1iECKO mice subject to the hindlimb ischemia model display impaired blood flow and decreased arteriogenesis. CONCLUSIONS Endothelial Akt1 signaling is necessary for ischemic resolution post-injury and likely reflects the consequence of NO insufficiency critical for vascular repair.
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Affiliation(s)
- Monica Y Lee
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Ana Gamez-Mendez
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Jiasheng Zhang
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Zhenwu Zhuang
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - David J Vinyard
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Jan Kraehling
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Heino Velazquez
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Gary W Brudvig
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Themis R Kyriakides
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - Michael Simons
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.)
| | - William C Sessa
- From the Vascular Biology and Therapeutics Program, Department of Pharmacology (M.Y.L., A.G.-M., J.K., W.C.S.), Vascular Biology and Therapeutics Program, Department of Pathology (T.R.K.), and Department of Cell Biology (M.S.), Yale University School of Medicine, New Haven, CT; Department of Internal Medicine, Section of Cardiovascular Medicine, Yale Cardiovascular Research Center, New Haven, CT (J.Z., Z.Z., M.S.); Department of Chemistry, Yale University, New Haven, CT (D.J.V., G.W.B.); and Department of Internal Medicine, VA Connecticut Healthcare System, West Haven, CT (H.V.).
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Kofler N, Corti F, Rivera-Molina F, Deng Y, Toomre D, Simons M. The Rab-effector protein RABEP2 regulates endosomal trafficking to mediate vascular endothelial growth factor receptor-2 (VEGFR2)-dependent signaling. J Biol Chem 2018; 293:4805-4817. [PMID: 29425100 DOI: 10.1074/jbc.m117.812172] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 01/24/2018] [Indexed: 02/02/2023] Open
Abstract
As a master regulator of endothelial cell function, vascular endothelial growth factor receptor-2 (VEGFR2) activates multiple downstream signaling pathways that are critical for vascular development and normal vessel function. VEGFR2 trafficking through various endosomal compartments modulates its signaling output. Accordingly, proteins that regulate the speed and direction by which VEGFR2 traffics through endosomes have been demonstrated to be particularly important for arteriogenesis. However, little is known about how these proteins control VEGFR2 trafficking and about the implications of this control for endothelial cell function. Here, we show that Rab GTPase-binding effector protein 2 (RABEP2), a Rab-effector protein implicated in arteriogenesis, modulates VEGFR2 trafficking. By employing high-resolution microscopy and biochemical assays, we demonstrate that RABEP2 interacts with the small GTPase Rab4 and regulates VEGFR2 endosomal trafficking to maintain cell-surface expression of VEGFR2 and VEGF signaling. Lack of RABEP2 also led to prolonged retention of VEGFR2 in Rab5-positive sorting endosomes, which increased VEGFR2's exposure to phosphotyrosine phosphatase 1b (PTP1b), causing diminished VEGFR2 signaling. Finally, the loss of RABEP2 increased VEGFR2 degradation by diverting VEGFR2 to Rab7-positive endosomes destined for the lysosome. These results implicate RABEP2 as a key modulator of VEGFR2 endosomal trafficking, and demonstrate the importance of RABEP2 and Rab4 for VEGFR2 signaling in endothelial cells.
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Affiliation(s)
- Natalie Kofler
- Department of Internal Medicine, Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, New Haven, Connecticut 06520
| | - Federico Corti
- Department of Internal Medicine, Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, New Haven, Connecticut 06520
| | - Felix Rivera-Molina
- Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06520
| | - Yong Deng
- Department of Internal Medicine, Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, New Haven, Connecticut 06520
| | - Derek Toomre
- Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06520
| | - Michael Simons
- Department of Internal Medicine, Yale Cardiovascular Research Center, Section of Cardiovascular Medicine, New Haven, Connecticut 06520; Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06520.
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49
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VEGF/PKD-1 signaling mediates arteriogenic gene expression and angiogenic responses in reversible human microvascular endothelial cells with extended lifespan. Mol Cell Biochem 2018; 446:199-207. [PMID: 29380239 DOI: 10.1007/s11010-018-3286-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 01/18/2018] [Indexed: 12/30/2022]
Abstract
Microvascular ECs (MVECs) are an ideal model in angiogenesis research. The aim of this study was to determine vascular endothelial growth factor (VEGF)/protein kinase D1 (PKD-1) signaling in expression of arteriogenic genes in human MVECs. To achieve this aim, we transduced specific SV40 large T antigen and telomerase into primary human dermal MVECs (HMVEC-D) to establish reversible HMVECs with extended lifespan (HMVECi-D). HMVECi-D was then exposed to VEGF/VEGF-inducer GS4012 or transduced with constitutively active protein kinase PKD-1 (PKD-CA). Quantitative RT-PCR was performed to detect arteriogenic gene expression. Furthermore, the angiogenic capacity in response to VEGF pathway was evaluated by Matrigel tube-formation and proliferation assays. We observed that VEGF/PKD-1 signaling axis significantly stimulated the expression of arteriogenic genes and promoted EC proliferation, along with downregulation of CD36 expression. Intriguingly, overexpression of PKD-CA also resulted in formation of tip cell morphology, accompanied by increased mRNA of delta-like ligand 4 (DLL4). In conclusion, we have successfully established and characterized HMVECi-D, and showed that VEGF/PKD-1 signaling axis increases angiogenic and arteriogenic gene expression. These studies suggest that the axis may regulate arteriolar differentiation through changing MVEC gene expression.
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50
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Control of Blood Vessel Formation by Notch Signaling. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1066:319-338. [PMID: 30030834 DOI: 10.1007/978-3-319-89512-3_16] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Blood vessels span throughout the body to nourish tissue cells and to provide gateways for immune surveillance. Endothelial cells that line capillaries have the remarkable capacity to be quiescent for years but to switch rapidly into the activated state once new blood vessels need to be formed. In addition, endothelial cells generate niches for progenitor and tumor cells and provide organ-specific paracrine (angiocrine) factors that control organ development and regeneration, maintenance of homeostasis and tumor progression. Recent data indicate a pivotal role for blood vessels in responding to metabolic changes and that endothelial cell metabolism is a novel regulator of angiogenesis. The Notch pathway is the central signaling mode that cooperates with VEGF, WNT, BMP, TGF-β, angiopoietin signaling and cell metabolism to orchestrate angiogenesis, tip/stalk cell selection and arteriovenous specification. Here, we summarize the current knowledge and implications regarding the complex roles of Notch signaling during physiological and tumor angiogenesis, the dynamic nature of tip/stalk cell selection in the nascent vessel sprout and arteriovenous differentiation. Furthermore, we shed light on recent work on endothelial cell metabolism, perfusion-independent angiocrine functions of endothelial cells in organ-specific vascular beds and how manipulation of Notch signaling may be used to target the tumor vasculature.
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