1
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Tang Z, Liu L, Borlak J. Combined inhibition of histone deacetylase and cytidine deaminase improves epigenetic potency of decitabine in colorectal adenocarcinomas. Clin Epigenetics 2023; 15:89. [PMID: 37208732 DOI: 10.1186/s13148-023-01500-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 05/03/2023] [Indexed: 05/21/2023] Open
Abstract
BACKGROUND Targeting the epigenome of cancerous diseases represents an innovative approach, and the DNA methylation inhibitor decitabine is recommended for the treatment of hematological malignancies. Although epigenetic alterations are also common to solid tumors, the therapeutic efficacy of decitabine in colorectal adenocarcinomas (COAD) is unfavorable. Current research focuses on an identification of combination therapies either with chemotherapeutics or checkpoint inhibitors in modulating the tumor microenvironment. Here we report a series of molecular investigations to evaluate potency of decitabine, the histone deacetylase inhibitor PBA and the cytidine deaminase (CDA) inhibitor tetrahydrouridine (THU) in patient derived functional and p53 null colon cancer cell lines (CCCL). We focused on the inhibition of cell proliferation, the recovery of tumor suppressors and programmed cell death, and established clinical relevance by evaluating drug responsive genes among 270 COAD patients. Furthermore, we evaluated treatment responses based on CpG island density. RESULTS Decitabine caused marked repression of the DNMT1 protein. Conversely, PBA treatment of CCCL recovered acetylation of histone 3 lysine residues, and this enabled an open chromatin state. Unlike single decitabine treatment, the combined decitabine/PBA treatment caused > 95% inhibition of cell proliferation, prevented cell cycle progression especially in the S and G2-phase and induced programmed cell death. Decitabine and PBA differed in their ability to facilitate re-expression of genes localized on different chromosomes, and the combined decitabine/PBA treatment was most effective in the re-expression of 40 tumor suppressors and 13 genes typically silenced in cancer-associated genomic regions of COAD patients. Furthermore, this treatment repressed expression of 11 survival (anti-apoptotic) genes and augmented expression of X-chromosome inactivated genes, especially the lncRNA Xist to facilitate p53-mediated apoptosis. Pharmacological inhibition of CDA by THU or its gene knockdown prevented decitabine inactivation. Strikingly, PBA treatment recovered the expression of the decitabine drug-uptake transporter SLC15A1, thus enabling high tumor drug-loads. Finally, for 26 drug responsive genes we demonstrated improved survival in COAD patients. CONCLUSION The combined decitabine/PBA/THU drug treatment improved drug potency considerably, and given their existing regulatory approval, our findings merit prospective clinical trials for the triple combination in COAD patients.
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Affiliation(s)
- Zijiao Tang
- Hannover Medical School, Centre for Pharmacology and Toxicology, Carl-Neuberg-Str.1, 30625, Hannover, Germany
| | - Lu Liu
- Hannover Medical School, Centre for Pharmacology and Toxicology, Carl-Neuberg-Str.1, 30625, Hannover, Germany
| | - Jürgen Borlak
- Hannover Medical School, Centre for Pharmacology and Toxicology, Carl-Neuberg-Str.1, 30625, Hannover, Germany.
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2
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Li R, Song X, Guo Y, Song P, Duan D, Chen ZS. Natural Products: A Promising Therapeutics for Targeting Tumor Angiogenesis. Front Oncol 2021; 11:772915. [PMID: 34746014 PMCID: PMC8570131 DOI: 10.3389/fonc.2021.772915] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/04/2021] [Indexed: 12/22/2022] Open
Abstract
Tumor-associated angiogenesis is a key target for anti-cancer therapy. The imbalance between pro-angiogenic and anti-angiogenic signals elicited by tumor cells or tumor microenvironment always results in activating "angiogenic switch". Tumor angiogenesis functions in multi-aspects of tumor biology, including endothelial cell apoptosis, tumor metastasis, and cancer stem cell proliferation. Numerous studies have indicated the important roles of inexpensive and less toxic natural products in targeting tumor angiogenesis-associated cytokines and apoptotic signaling pathways. Our current knowledge of tumor angiogenesis is based mainly on experiments performed on cells and animals, so we summarized the well-established models for angiogenesis both in vitro and in vivo. In this review, we classified and summarized the anti-angiogenic natural agents (Polyphenols, Polysaccharides, Alkaloids, Terpenoids, Saponins) in targeting various tumor types according to their chemical structures at present, and discussed the mechanistic principles of these natural products on regulating angiogenesis-associated cytokines and apoptotic signaling pathways. This review is to help understanding the recent progress of natural product research for drug development on anti-tumor angiogenesis.
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Affiliation(s)
- Ruyi Li
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xin Song
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, China
| | - Yanan Guo
- Research Center of Traditional Chinese Medicine in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, China.,Key Laboratory of Prevention and Treatment for Chronic Diseases by Traditional Chinese Medicine in Gansu Province, Affiliated Hospital of Gansu University of Chinese Medicine, Lanzhou, China
| | - Peng Song
- Research Center of Traditional Chinese Medicine in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, China.,Key Laboratory of Prevention and Treatment for Chronic Diseases by Traditional Chinese Medicine in Gansu Province, Affiliated Hospital of Gansu University of Chinese Medicine, Lanzhou, China
| | - Dongzhu Duan
- Shaanxi Key Laboratory of Phytochemistry and College of Chemistry & Chemical Engineering, Baoji University of Arts and Sciences, Baoji, China
| | - Zhe-Sheng Chen
- College of Pharmacy and Health Sciences, St. John's University, Queens, NY, United States
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3
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Solly EL, Psaltis PJ, Bursill CA, Tan JTM. The Role of miR-181c in Mechanisms of Diabetes-Impaired Angiogenesis: An Emerging Therapeutic Target for Diabetic Vascular Complications. Front Pharmacol 2021; 12:718679. [PMID: 34483928 PMCID: PMC8414254 DOI: 10.3389/fphar.2021.718679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/06/2021] [Indexed: 12/13/2022] Open
Abstract
Diabetes mellitus is estimated to affect up to 700 million people by the year 2045, contributing to an immense health and economic burden. People living with diabetes have a higher risk of developing numerous debilitating vascular complications, leading to an increased need for medical care, a reduced quality of life and increased risk of early death. Current treatments are not satisfactory for many patients who suffer from impaired angiogenesis in response to ischaemia, increasing their risk of ischaemic cardiovascular conditions. These vascular pathologies are characterised by endothelial dysfunction and abnormal angiogenesis, amongst a host of impaired signaling pathways. Therapeutic stimulation of angiogenesis holds promise for the treatment of diabetic vascular complications that stem from impaired ischaemic responses. However, despite significant effort and research, there are no established therapies that directly stimulate angiogenesis to improve ischaemic complications such as ischaemic heart disease and peripheral artery disease, highlighting the immense unmet need. However, despite significant effort and research, there are no established therapies that directly stimulate angiogenesis in a clinical setting, highlighting the immense unmet need. MicroRNAs (miRNAs) are emerging as powerful targets for multifaceted diseases including diabetes and cardiovascular disease. This review highlights the potential role of microRNAs as therapeutic targets for rescuing diabetes-impaired angiogenesis, with a specific focus on miR-181c, which we have previously identified as an important angiogenic regulator. Here we summarise the pathways currently known to be regulated by miR-181c, which include the classical angiogenesis pathways that are dysregulated in diabetes, mitochondrial function and axonal guidance, and describe how these relate both directly and indirectly to angiogenesis. The pleiotropic actions of miR-181c across multiple key angiogenic signaling pathways and critical cellular processes highlight its therapeutic potential as a novel target for treating diabetic vascular complications.
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Affiliation(s)
- Emma L Solly
- Vascular Research Centre, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
| | - Peter J Psaltis
- Vascular Research Centre, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
| | - Christina A Bursill
- Vascular Research Centre, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia.,ARC Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, SA, Australia
| | - Joanne T M Tan
- Vascular Research Centre, Lifelong Health Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia.,Adelaide Medical School, The University of Adelaide, Adelaide, SA, Australia
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4
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do Monte FA, Ahuja N, Awad KR, Pan Z, Young S, Kim HKW, Aswath P, Brotto M, Varanasi VG. Silicon Oxynitrophosphide Nanoscale Coating Enhances Antioxidant Marker-Induced Angiogenesis During in vivo Cranial Bone-Defect Healing. JBMR Plus 2021; 5:e10425. [PMID: 33869985 PMCID: PMC8046063 DOI: 10.1002/jbm4.10425] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 09/18/2020] [Accepted: 10/01/2020] [Indexed: 11/08/2022] Open
Abstract
Critical-sized bone defects are challenging to heal because of the sudden and large volume of lost bone. Fixative plates are often used to stabilize defects, yet oxidative stress and delayed angiogenesis are contributing factors to poor biocompatibility and delayed bone healing. This study tests the angiogenic and antioxidant properties of amorphous silicon oxynitrophosphide (SiONPx) nanoscale-coating material on endothelial cells to regenerate vascular tissue in vitro and in bone defects. in vitro studies evaluate the effect of silicon oxynitride (SiONx) and two different SiONPx compositions on human endothelial cells exposed to ROS (eg, hydrogen peroxide) that simulates oxidative stress conditions. in vivo studies using adult male Sprague Dawley rats (approximately 450 g) were performed to compare a bare plate, a SiONPx-coated implant plate, and a sham control group using a rat standard-sized calvarial defect. Results from this study showed that plates coated with SiONPx significantly reduced cell death, and enhanced vascular tubule formation and matrix deposition by upregulating angiogenic and antioxidant expression (eg, vascular endothelial growth factor A, angiopoetin-1, superoxide dismutase 1, nuclear factor erythroid 2-related factor 2, and catalase 1). Moreover, endothelial cell markers (CD31) showed a significant tubular structure in the SiONPx coating group compared with an empty and uncoated plate group. This reveals that atomic doping of phosphate into the nanoscale coating of SiONx produced markedly elevated levels of antioxidant and angiogenic markers that enhance vascular tissue regeneration. This study found that SiONPx or SiONx nanoscale-coated materials enhance antioxidant expression, angiogenic marker expression, and reduce ROS levels needed for accelerating vascular tissue regeneration. These results further suggest that SiONPx nanoscale coating could be a promising candidate for titanium plate for rapid and enhanced cranial bone-defect healing. © 2020 The Authors. JBMR Plus published by Wiley Periodicals LLC. on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Felipe A do Monte
- Department of BioengineeringUniversity of Texas at ArlingtonArlingtonTXUSA
- Center for Excellence in Hip DisordersTexas Scottish Rite HospitalDallasTXUSA
| | - Neelam Ahuja
- Bone‐Muscle Research CenterUniversity of Texas at ArlingtonArlingtonTXUSA
| | - Kamal R Awad
- Bone‐Muscle Research CenterUniversity of Texas at ArlingtonArlingtonTXUSA
- Department of Materials Science and EngineeringUniversity of Texas at ArlingtonArlingtonTXUSA
| | - Zui Pan
- Bone‐Muscle Research CenterUniversity of Texas at ArlingtonArlingtonTXUSA
| | - Simon Young
- Department of Oral and Maxillofacial SurgeryThe University of Texas Health Science Center at Houston, School of DentistryHoustonTXUSA
| | - Harry KW Kim
- Center for Excellence in Hip DisordersTexas Scottish Rite HospitalDallasTXUSA
- Department of Orthopedic SurgeryUniversity of Texas Southwestern Medical Center at DallasDallasTXUSA
| | - Pranesh Aswath
- Department of Materials Science and EngineeringUniversity of Texas at ArlingtonArlingtonTXUSA
| | - Marco Brotto
- Bone‐Muscle Research CenterUniversity of Texas at ArlingtonArlingtonTXUSA
| | - Venu G Varanasi
- Bone‐Muscle Research CenterUniversity of Texas at ArlingtonArlingtonTXUSA
- Department of Materials Science and EngineeringUniversity of Texas at ArlingtonArlingtonTXUSA
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5
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Park YG, Choi J, Seol JW. Angiopoietin-2 regulated by progesterone induces uterine vascular remodeling during pregnancy. Mol Med Rep 2020; 22:1235-1242. [PMID: 32468067 PMCID: PMC7339584 DOI: 10.3892/mmr.2020.11185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 05/04/2020] [Indexed: 01/02/2023] Open
Abstract
During pregnancy, the uterus undergoes intense neovascularization and vascular remodeling to supply oxygen and nutrients to the embryo. During this period, progesterone secreted from the ovary has effects on vascular remodeling in the endometrium and interacts with angiogenic factors. However, the exact mechanism of uterine vascular remodeling during pregnancy is poorly understood. Therefore, the aim of the present study was to investigate the association between angiopoietin-2 (Ang-2), one of the angiopoietins, and intrauterine vessel remodeling during pregnancy, and to determine the effect of progesterone on Ang-2 levels. Changes in Ang-2 expression were observed according to quantitative modification of progesterone using pregnant mice and human uterine microvascular endothelial cells. As a result, Ang-2 was observed mainly in the mesometrial region (MR) of the uterus during the period between implantation and placentation. Furthermore, a substantial amount of Ang-2 also appeared in endothelial cells, particularly of the venous sinus region (VSR). Interestingly, Ang-2 expression was increased by progesterone, whereas estrogen had limited effects. To confirm the association between Ang-2 and progesterone, the function of the progesterone receptor (PR) was inhibited using RU486, a blocker of PR. Ang-2 expression and vascular remodeling of the VSR in the uterus were decreased when the functions of progesterone were inhibited. Overall, the regulation of Ang-2 by progesterone/PR was associated with vascular remodeling in the VSR during pregnancy. The present study proposed a solution to prevent pregnancy failure due to a lack of vascularity in the uterus in advance.
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Affiliation(s)
- Yang-Gyu Park
- Biosafety Research Institute and Laboratory of Biochemistry, College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeonbuk 54596, Republic of Korea
| | - Jawun Choi
- Biosafety Research Institute and Laboratory of Biochemistry, College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeonbuk 54596, Republic of Korea
| | - Jae-Won Seol
- Biosafety Research Institute and Laboratory of Biochemistry, College of Veterinary Medicine, Jeonbuk National University, Iksan, Jeonbuk 54596, Republic of Korea
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6
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Pan L, Liu Z, Chen Y, Yang B, Cheng B. Angiopoietin-1: Can be produced by endothelial cells and act in an autocrine agonistic manner? Clin Hemorheol Microcirc 2020; 74:341-345. [PMID: 31884457 DOI: 10.3233/ch-190731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Liangli Pan
- Dermatology Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Zhenfeng Liu
- Dermatology Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Yongjun Chen
- Dermatology Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Bin Yang
- Dermatology Hospital of Southern Medical University, Guangzhou, P. R. China
| | - Biao Cheng
- General Hospital of Southern Theater Command, Guangzhou, P. R. China
- Southern Medical University, Guangzhou, P. R. China
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7
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Yu X, Ye F. Role of Angiopoietins in Development of Cancer and Neoplasia Associated with Viral Infection. Cells 2020; 9:cells9020457. [PMID: 32085414 PMCID: PMC7072744 DOI: 10.3390/cells9020457] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/09/2020] [Accepted: 02/13/2020] [Indexed: 02/06/2023] Open
Abstract
Angiopoietin/tyrosine protein kinase receptor Tie-2 signaling in endothelial cells plays an essential role in angiogenesis and wound healing. Angiopoietin-1 (Ang-1) is crucial for blood vessel maturation while angiopoietin-2 (Ang-2), in collaboration with vascular endothelial growth factor (VEGF), initiates angiogenesis by destabilizing existing blood vessels. In healthy people, the Ang-1 level is sustained while Ang-2 expression is restricted. In cancer patients, Ang-2 level is elevated, which correlates with poor prognosis. Ang-2 not only drives tumor angiogenesis but also attracts infiltration of myeloid cells. The latter rapidly differentiate into tumor stromal cells that foster tumor angiogenesis and progression, and weaken the host’s anti-tumor immunity. Moreover, through integrin signaling, Ang-2 induces expression of matrix metallopeptidases (MMPs) to promote tumor cell invasion and metastasis. Many oncogenic viruses induce expression of Ang-2 to promote development of neoplasia associated with viral infection. Multiple Ang-2 inhibitors exhibit remarkable anti-tumor activities, further highlighting the importance of Ang-2 in cancer development.
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Affiliation(s)
- Xiaolan Yu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan 430062, China
- Hubei Key Laboratory of Industrial Biotechnology, College of Life Sciences, Hubei University, Wuhan 430062, China
- Correspondence: (X.Y.); (F.Y.); Tel.: +086-27-88661237 (X.Y.); +216-368-8892 (F.Y.)
| | - Fengchun Ye
- Department of Molecular Biology & Microbiology, School of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA
- Correspondence: (X.Y.); (F.Y.); Tel.: +086-27-88661237 (X.Y.); +216-368-8892 (F.Y.)
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8
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do Monte FA, Awad KR, Ahuja N, Kim HK, Aswath P, Brotto M, Varanasi VG. Amorphous Silicon Oxynitrophosphide-Coated Implants Boost Angiogenic Activity of Endothelial Cells. Tissue Eng Part A 2020; 26:15-27. [PMID: 31044666 PMCID: PMC6983748 DOI: 10.1089/ten.tea.2019.0051] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 04/29/2019] [Indexed: 12/29/2022] Open
Abstract
Lack of osteointegration is a major cause of aseptic loosening and failure of implants used in bone replacement. Implants coated with angiogenic biomaterials can improve osteointegration and potentially reduce these complications. Silicon- and phosphorus-based materials have been shown to upregulate expression of angiogenic factors and improve endothelial cell functions. In the present study, we hypothesize that implants coated with amorphous silica-based coatings in the form of silicon oxynitrophosphide (SiONP) by using plasma-enhanced chemical vapor deposition (PECVD) technique could enhance human umbilical vein endothelial cell angiogenic properties in vitro. The tested groups were: glass coverslip (GCS), tissue culture plate, SiON, SiONP1 (O: 7.3 at %), and SiONP2 (O: 14.2 at %) implants. The SiONP2 composition demonstrated 3.5-fold more fibronectin deposition than the GCS (p < 0.001). The SiONP2 group also presented a significant improvement in the capillary tubule length and thickness compared with the other groups (p < 0.01). At 24 h, we observed at least a twofold upregulation of vascular endothelial growth factor A, hypoxia-inducible factor-1α, angiopoietin-1, and nesprin-2, more evident in the SiONP1 and SiONP2 groups. In conclusion, the studied amorphous silica-coated implants, especially the SiONP2 composition, could enhance the endothelial cell angiogenic properties in vitro and may induce faster osteointegration and healing. Impact Statement In this study, we report for the first time the significant enhancement of human umbilical vein endothelial cell angiogenic properties (in vitro) by the amorphous silica-based coatings in the form of silicon oxynitrophosphide (SiONP). The SiONP2 demonstrated 3.5-fold more fibronectin deposition than the glass coverslip and presented a significant improvement in the capillary tubule length and thickness. At 24 h, SiONP reported twofold upregulation of vascular endothelial growth factor A, hypoxia-inducible factor-1α, angiopoietin-1, and nesprin-2. The studied amorphous silica-coated implants enhance the endothelial cell angiogenic properties in vitro and may induce faster osteointegration and healing.
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Affiliation(s)
- Felipe A. do Monte
- Department of Bioengineering, University of Texas at Arlington, Arlington, Texas
- Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital, Dallas, Texas
| | - Kamal R. Awad
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas
- Bone-Muscle Research Center, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas
| | - Neelam Ahuja
- Bone-Muscle Research Center, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas
| | - Harry K.W. Kim
- Center for Excellence in Hip Disorders, Texas Scottish Rite Hospital, Dallas, Texas
- Department of Orthopedic Surgery, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas
| | - Pranesh Aswath
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas
| | - Marco Brotto
- Bone-Muscle Research Center, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas
| | - Venu G. Varanasi
- Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, Texas
- Bone-Muscle Research Center, College of Nursing and Health Innovation, University of Texas at Arlington, Arlington, Texas
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9
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Heyba M, Al-Abdullah L, Henkel AW, Sayed Z, Malatiali SA, Redzic ZB. Viability and Contractility of Rat Brain Pericytes in Conditions That Mimic Stroke; an in vitro Study. Front Neurosci 2019; 13:1306. [PMID: 31866815 PMCID: PMC6906154 DOI: 10.3389/fnins.2019.01306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 11/21/2019] [Indexed: 12/12/2022] Open
Abstract
Reopening of the cerebral artery after occlusion often results in “no-reflow” that has been attributed to the death and contraction (rigor mortis) of pericytes. Since this hypothesis still needs to be confirmed, we explored the effects of oxygen glucose deprivation (OGD) on viability and cell death of primary rat pericytes, in the presence or absence of neurovascular unit-derived cytokines. Two morphodynamic parameters, single cell membrane mobility (SCMM) and fractal dimension (Df), were used to analyze the cell contractions and membrane complexity before and after OGD. We found a marginal reduction in cell viability after 2–6 h OGD; 24 h OGD caused a large reduction in viability and a large increase in the number of apoptotic and dead cells. Application of erythropoietin (EPO), or a combination of EPO and endothelial growth factor (VEGFA1−165) during OGD significantly reduced cell viability; application of Angiopoietin 1 (Ang1) during OGD caused a marginal, insignificant increase in cell viability. Simultaneous application of EPO, VEGFA1−165, and Ang1 significantly increased cell viability during 24 h OGD. Twenty minutes and one hour OGD both significantly reduced SCMM compared to pre-OGD values, while no significant difference was seen in SCMM before and after 3 h OGD. There was a significant decrease in membrane complexity (Df) at 20 min during the OGD that disappeared thereafter. In conclusion, OGD transiently affected cell mobility and shape, which was followed by apoptosis in cultured pericytes. Ang1 may have a potentiality for preventing from the OGD-induced apoptosis. Further studies could clarify the relationship between cell contraction and apoptosis during OGD.
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Affiliation(s)
- Mohammed Heyba
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Lulwa Al-Abdullah
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Andreas W Henkel
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Zeinab Sayed
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Slava A Malatiali
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Zoran B Redzic
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
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10
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Bilimoria J, Singh H. The Angiopoietin ligands and Tie receptors: potential diagnostic biomarkers of vascular disease. J Recept Signal Transduct Res 2019; 39:187-193. [PMID: 31429357 DOI: 10.1080/10799893.2019.1652650] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The Angiopoietin-1 (Angpt1)/Tie2 signaling pathway is important in regulating vascular function. Angpt1-induced Tie2 activation promotes vascular endothelial cell survival and reduces vascular leakage. Angiopoietin-2 (Angpt2), a weak agonist/antagonist of Tie2, opposes and regulates Angpt1 action. The Tie family of receptor tyrosine kinases, Tie2 and Tie1, exist as either homo-or heterodimers. The molecular complex between the receptors is also crucial in controlling Angpt1 signaling; hence, the molecular balance between Angpt1:Angpt2 and Tie2:Tie1 is important in determining endothelial integrity and vascular stability. This review presents evidence of the change observed in the Angiopoietin/Tie molecules in various pathophysiological conditions and discusses the potential clinical applications of these molecules in vascular complications.
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Affiliation(s)
- Jay Bilimoria
- Faculty of Health and Life Sciences, Leicester School of Allied Health Sciences, De Montfort University , Leicester , UK
| | - Harprit Singh
- Faculty of Health and Life Sciences, Leicester School of Allied Health Sciences, De Montfort University , Leicester , UK
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11
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Yin J, Gong G, Liu X. Angiopoietin: A Novel Neuroprotective/Neurotrophic Agent. Neuroscience 2019; 411:177-184. [PMID: 31152935 DOI: 10.1016/j.neuroscience.2019.05.038] [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] [Received: 04/05/2019] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 11/29/2022]
Abstract
Angiopoietin (Ang) is an angiogenic factor, but its neuroprotective and neurotrophic effects have recently come to light. Ang exerts neuroprotective effects by inhibiting neuronal apoptosis, protecting the blood-brain/blood-spinal cord barrier, reducing inflammation and promoting neovascularization. In addition, Ang can also promote neural development and neurite outgrowth via activation of the PI3K/Akt signaling pathway and binding to the Tie2 receptor and/or integrin receptor. In addition, Ang and vascular endothelial growth factor (VEGF) are known to interact in blood vessels in the nervous system and the combination of Ang and VEGF can mitigate the negative effects of VEGF, such as inflammation and local edema. These data indicated that Ang is a novel neuroprotective/neurotrophic factor, which may become a new tool for the treatment of nerve injury.
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Affiliation(s)
- Jian Yin
- Department of Orthopedics, the Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing 211100, China
| | - Ge Gong
- Department of Geriatrics, Jinling Hospital, Medical School of Nanjing University, Nanjing, 211002, China
| | - Xinhui Liu
- Department of Orthopedics, the Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing 211100, China.
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12
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Issa E, Moss AJ, Fischer M, Kang M, Ahmed S, Farah H, Bate N, Giakomidi D, Brindle NP. Development of an Orthogonal Tie2 Ligand Resistant to Inhibition by Ang2. Mol Pharm 2018; 15:3962-3968. [PMID: 30036484 DOI: 10.1021/acs.molpharmaceut.8b00409] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Angiopoietin-1 (Ang1) is a vascular protective ligand that acts through the receptor tyrosine kinase Tie2 to enhance endothelial survival and quiescence. In sepsis, diabetic retinopathy, and a range of other diseases, Ang2, an antagonist of Tie2, increases markedly. This antagonist suppresses Ang1 protective effects leading to vascular destabilization, inflammation, and endothelial death. Administration of recombinant Ang1 can counter Ang2 antagonism and restore vascular function. However, recombinant Ang1 is needed at sufficiently high concentrations to block Ang2, and the protein is difficult to produce, requires mammalian expression systems, and is prone to aggregation. Here we present an engineered synthetic Tie2 ligand that is not antagonized by Ang2 but is easy to produce and more robust than Ang1. Using a peptide phage display, we isolated a heptameric sequence that binds Tie2-ectodomain and fused this to the coiled:coil domain of cartilage oligomeric matrix protein. This pentameric protein is 60 kDa in size, expressed in E. coli, and facile to purify. The protein, designated TSL1, binds to Tie2-ectodomain in vitro and on the cell surface. TSL1 inhibits endothelial apoptosis. Crucially, TSL1 binds at a site on Tie2 distinct from the angiopoietin-binding site and is resistant to antagonism by Ang2. This engineered ligand has several advantages over recombinant Ang1 for potential therapeutic applications. The study also highlights the value of orthogonal ligands for regulating cellular receptors without being subject to antagonism or modulation by endogenous ligands.
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Affiliation(s)
- Eyad Issa
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Andrew J Moss
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Marlies Fischer
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Mandeep Kang
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Sultan Ahmed
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Hussein Farah
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Neil Bate
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Despoina Giakomidi
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
| | - Nicholas Pj Brindle
- Department of Cardiovascular Sciences and Department of Molecular and Cell Biology , University of Leicester , Henry Wellcome Building, Lancaster Road , Leicester LE1 7RH , U.K
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13
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Sabirzhanov B, Faden AI, Aubrecht T, Henry R, Glaser E, Stoica BA. MicroRNA-711-Induced Downregulation of Angiopoietin-1 Mediates Neuronal Cell Death. J Neurotrauma 2018; 35:2462-2481. [PMID: 29774773 DOI: 10.1089/neu.2017.5572] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Angiopoietin-1 (Ang-1) is a well-known endothelial growth factor, but its effects on neurons have yet to be elucidated. We show that Ang-1 is rapidly downregulated in the injured brain after controlled cortical impact (CCI), a mouse experimental traumatic brain injury (TBI) model and in etoposide-induced neuronal apoptosis in vitro. Ang-1 treatment inhibits etoposide-induced upregulation of proapoptotic B-cell lymphoma 2 (Bcl-2) family members Noxa, p53 upregulated modulator of apoptosis (Puma), Bcl-2 interacting mediator of cell death (Bim), and Bcl-2-associated X protein (Bax); reduces markers of caspase-dependent (cytochrome c release/caspase activation) and caspase-independent (apoptosis-inducing factor release) pathways; and limits neuronal cell death. Ang-1 treatment phosphorylates receptors Tunica interna endothelial cell kinase 2 (Tie2), and β1-integrin and limits the etoposide-induced decrease in protein kinase B (Akt) activity. Blocking Tie2 and β1-integrin signaling reduces Ang-1 neuroprotective effects. After both TBI and etoposide treatment microRNA (miR)-711 are upregulated, consistent with its putative role as a negative regulator of Ang-1. We show that miR-711 directly targets the Ang-1 messenger RNA (mRNA), decreasing Ang-1 expression. Increased levels of miR-711 and Ang-1 mRNA are found in the RNA-induced silencing complex complex site of miR-mediated degradation of target mRNAs after etoposide treatment and the miR-711mimic downregulates Ang-1. Administration of miR-711 inhibitor elevates Ang-1 after TBI whereas Ang-1 administration increases Akt activation; reduces Puma, Noxa, Bim, and Bax levels; and attenuates caspase-dependent and -independent neuronal apoptosis 24 h after TBI. Ang-1 also attenuates neuronal degeneration, increases gene expression of molecules that maintain blood-brain barrier integrity, and reduces post-traumatic lesion volume/edema 24 h after TBI. Although we only observed short-term neuroprotective effects after Ang-1 administration, miR-711-dependent downregulation of Ang-1, followed by Akt pathway inhibition, may play a role in neuronal cell death after neuronal injury in vitro and after experimental TBI.
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Affiliation(s)
- Boris Sabirzhanov
- Department of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research (STAR), University of Maryland , School of Medicine, Baltimore, Maryland
| | - Alan I Faden
- Department of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research (STAR), University of Maryland , School of Medicine, Baltimore, Maryland
| | - Taryn Aubrecht
- Department of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research (STAR), University of Maryland , School of Medicine, Baltimore, Maryland
| | - Rebecca Henry
- Department of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research (STAR), University of Maryland , School of Medicine, Baltimore, Maryland
| | - Ethan Glaser
- Department of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research (STAR), University of Maryland , School of Medicine, Baltimore, Maryland
| | - Bogdan A Stoica
- Department of Anesthesiology and Center for Shock, Trauma, and Anesthesiology Research (STAR), University of Maryland , School of Medicine, Baltimore, Maryland
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Hu S, Park J, Liu A, Lee J, Zhang X, Hao Q, Lee JW. Mesenchymal Stem Cell Microvesicles Restore Protein Permeability Across Primary Cultures of Injured Human Lung Microvascular Endothelial Cells. Stem Cells Transl Med 2018; 7:615-624. [PMID: 29737632 PMCID: PMC6090509 DOI: 10.1002/sctm.17-0278] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 04/03/2018] [Indexed: 12/12/2022] Open
Abstract
Our previous study demonstrated that mesenchymal stem cell (MSC) microvesicles (MV) reduced lung inflammation, protein permeability, and pulmonary edema in endotoxin-induced acute lung injury in mice. However, the underlying mechanisms for restoring lung protein permeability were not fully understood. In this current study, we hypothesized that MSC MV would restore protein permeability across injured human lung microvascular endothelial cells (HLMVEC) in part through the transfer of angiopoietin-1 (Ang1) mRNA to the injured endothelium. A transwell coculture system was used to study the effect of MSC MV on protein permeability across HLMVECs injured by cytomix, a mixture of IL-1β, TNF-α, and IFN-γ (50 ng/ml). Our result showed that cytomix significantly increased permeability to FITC-dextran (70 kDa) across HLMVECs over 24 hours. Administration of MSC MVs restored this permeability in a dose dependent manner, which was associated with an increase in Ang1 mRNA and protein secretion in the injured endothelium. This beneficial effect was diminished when MSC MV was pretreated with an anti-CD44 antibody, suggesting that internalization of MV into the HLMVEC was required for the therapeutic effect. Fluorescent microscopy showed that MSC MV largely prevented the reorganization of cytoskeleton protein F-actin into "actin stress fiber" and restored the location of the tight junction protein ZO-1 and adherens junction protein VE-cadherin in injured HLMVECs. Ang1 siRNA pretreatment of MSC MV prior to administration to injured HLMVECs eliminated the therapeutic effect of MV. In summary, MSC MVs restored protein permeability across HLMVEC in part by increasing Ang1 secretion by injured HLMVEC. Stem Cells Translational Medicine 2018;7:615-624.
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Affiliation(s)
- Shuling Hu
- Department of Anesthesiology, University of California San Francisco, San Francisco, California, USA
| | - Jeonghyun Park
- Department of Anesthesiology, University of California San Francisco, San Francisco, California, USA
| | - Airan Liu
- Department of Anesthesiology, University of California San Francisco, San Francisco, California, USA
| | - JaeHoon Lee
- Department of Anesthesiology, University of California San Francisco, San Francisco, California, USA
| | - Xiwen Zhang
- Department of Anesthesiology, University of California San Francisco, San Francisco, California, USA
| | - Qi Hao
- Department of Anesthesiology, University of California San Francisco, San Francisco, California, USA
| | - Jae-Woo Lee
- Department of Anesthesiology, University of California San Francisco, San Francisco, California, USA
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15
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Al-Sarraf H, Malatiali S, Al-Awadi M, Redzic Z. Effects of erythropoietin on astrocytes and brain endothelial cells in primary culture during anoxia depend on simultaneous signaling by other cytokines and on duration of anoxia. Neurochem Int 2017; 113:34-45. [PMID: 29180303 DOI: 10.1016/j.neuint.2017.11.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 11/08/2017] [Accepted: 11/22/2017] [Indexed: 12/13/2022]
Abstract
Studies on animals revealed neuroprotective effects of exogenously applied erythropoietin (EPO) during cerebral ischemia/hypoxia. Yet, application of exogenous EPO in stroke patients often lead to haemorrhagic transformation. To clarify potential mechanism of this adverse effect we explored effects of EPO on viabilities of astrocytes and brain endothelial cells (BECs) in primary culture during anoxia of various durations, in the presence or absence of vascular endothelial growth factor (VEGF) and angiopoietin-1 (Ang1), which are cytokines that are also released from the neurovascular unit during hypoxia. Anoxia (2-48 h) exerted marginal effects on BECs' viability and significant reductions in viability of astrocytes. Astrocyte-conditioned medium did not exert effects and exerted detrimental effects on BECs during 2 h and 24 h anoxia, respectively. This was partially reversed by inhibition of Janus kinase (Jak)2/signal transducer and activator of transcription (STAT)5 activation. Addition of rat recombinant EPO (rrEPO) during 2 h-6h anoxia was protective for astrocytes, but had no effect on BECs. Addition of rrEPO significantly reduced viability of BECs and astrocytes after 48 h anoxia and after 24 h-48 h anoxia, respectively, which was attenuated by inhibition of Jak2/STAT5 activation. Simultaneous addition of rrEPO and VEGFA (1-165) caused marginal effects on BECs, but a highly significant protective effects on astrocytes during 24-48 h anoxia, which were attenuated by inhibition of Jak2/STAT5 activation. Simultaneous addition of EPO, VEGFA 1-165 and Ang1 exerted protective effects on BECs during 24 h-48 h anoxia, which were attenuated by addition of soluble Tie2 receptor. These data revealed that EPO could exert protective, but also injurious effects on BECs and astrocytes during anoxia, which depended on the duration of anoxia and on simultaneous signaling by VEGF and Ang1. If these injurious effects occur in stroke patients, they could enhance vascular damage and haemorrhagic transformation.
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Affiliation(s)
- Hameed Al-Sarraf
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait
| | - Slava Malatiali
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait
| | - Mariam Al-Awadi
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait
| | - Zoran Redzic
- Department of Physiology, Faculty of Medicine, Kuwait University, Kuwait.
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16
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Tumor angiogenesis and vascular normalization: alternative therapeutic targets. Angiogenesis 2017; 20:409-426. [PMID: 28660302 DOI: 10.1007/s10456-017-9562-9] [Citation(s) in RCA: 904] [Impact Index Per Article: 129.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 06/21/2017] [Indexed: 12/27/2022]
Abstract
Tumor blood vessels are a key target for cancer therapeutic management. Tumor cells secrete high levels of pro-angiogenic factors which contribute to the creation of an abnormal vascular network characterized by disorganized, immature and permeable blood vessels, resulting in poorly perfused tumors. The hypoxic microenvironment created by impaired tumor perfusion can promote the selection of more invasive and aggressive tumor cells and can also impede the tumor-killing action of immune cells. Furthermore, abnormal tumor perfusion also reduces the diffusion of chemotherapeutic drugs and radiotherapy efficiency. To fight against this defective phenotype, the normalization of the tumor vasculature has emerged as a new therapeutic strategy. Vascular normalization, by restoring proper tumor perfusion and oxygenation, could limit tumor cell invasiveness and improve the effectiveness of anticancer treatments. In this review, we investigate the mechanisms involved in tumor angiogenesis and describe strategies used to achieve vascular normalization.
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17
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Alawo DOA, Tahir TA, Fischer M, Bates DG, Amirova SR, Brindle NPJ. Regulation of Angiopoietin Signalling by Soluble Tie2 Ectodomain and Engineered Ligand Trap. Sci Rep 2017. [PMID: 28623351 PMCID: PMC5473842 DOI: 10.1038/s41598-017-03981-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Angiopoietin-1 (Angpt1) is a glycoprotein ligand important for maintaining the vascular system. It signals via a receptor tyrosine kinase expressed on the surface on endothelial cells, Tie2. This receptor can undergo regulated ectodomain cleavage that releases the ligand-binding domain (sTie2) into the circulation. The concentration of sTie2 is increased in a range of conditions, including peripheral arterial disease and myocardial infarction, where it has been suggested to bind and block Angpt1 resulting in vascular dysfunction. Here we use a joint mathematical modelling and experimental approach to assess the potential impact of sTie2 on the ability of Angpt1 to signal. We find that the concentrations of sTie2 relative to Angpt1 required to suppress signalling by the ligand are more than ten–fold higher than those ever seen in normal or disease conditions. In contrast to the endogenous sTie2, an engineered form of sTie2, which presents dimeric ligand binding sites, inhibits Angpt1 signalling at seventy-fold lower concentrations. While loss of Tie2 ectodomain can suppress Angpt1 signalling locally in the cells in which the receptor is lost, our study shows that the resulting increase in circulating sTie2 is unlikely to affect Angpt1 activity elsewhere in the body.
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Affiliation(s)
- Deborah O A Alawo
- University of Leicester Department of Cardiovascular Science and Department of Molecular and Cell Biology, Henry Wellcome Building, Lancaster Road, Leicester, LE1 7RH, UK
| | - Tariq A Tahir
- University of Leicester Department of Cardiovascular Science and Department of Molecular and Cell Biology, Henry Wellcome Building, Lancaster Road, Leicester, LE1 7RH, UK
| | - Marlies Fischer
- University of Leicester Department of Cardiovascular Science and Department of Molecular and Cell Biology, Henry Wellcome Building, Lancaster Road, Leicester, LE1 7RH, UK
| | - Declan G Bates
- University of Warwick, Department of Engineering, School of Engineering, Coventry, CV4 7AL, UK
| | - Svetlana R Amirova
- Advanced Data Mining International LLC, 3620 Pelham Road, PMB 351, Greenville, SC 29615, USA
| | - Nicholas P J Brindle
- University of Leicester Department of Cardiovascular Science and Department of Molecular and Cell Biology, Henry Wellcome Building, Lancaster Road, Leicester, LE1 7RH, UK.
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18
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NOX2, NOX4, and mitochondrial-derived reactive oxygen species contribute to angiopoietin-1 signaling and angiogenic responses in endothelial cells. Vascul Pharmacol 2017; 92:22-32. [DOI: 10.1016/j.vph.2017.03.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 03/13/2017] [Accepted: 03/18/2017] [Indexed: 11/17/2022]
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19
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Flores-Pérez A, Marchat LA, Rodríguez-Cuevas S, Bautista-Piña V, Hidalgo-Miranda A, Ocampo EA, Martínez MS, Palma-Flores C, Fonseca-Sánchez MA, Astudillo-de la Vega H, Ruíz-García E, González-Barrios JA, Pérez-Plasencia C, Streber ML, López-Camarillo C. Dual targeting of ANGPT1 and TGFBR2 genes by miR-204 controls angiogenesis in breast cancer. Sci Rep 2016; 6:34504. [PMID: 27703260 PMCID: PMC5050489 DOI: 10.1038/srep34504] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 09/15/2016] [Indexed: 12/22/2022] Open
Abstract
Deregulated expression of microRNAs has been associated with angiogenesis. Studying the miRNome of locally advanced breast tumors we unsuspectedly found a dramatically repression of miR-204, a small non-coding RNA with no previous involvement in tumor angiogenesis. Downregulation of miR-204 was confirmed in an independent cohort of patients and breast cancer cell lines. Gain-of-function analysis indicates that ectopic expression of miR-204 impairs cell proliferation, anchorage-independent growth, migration, invasion, and the formation of 3D capillary networks in vitro. Likewise, in vivo vascularization and angiogenesis were suppressed by miR-204 in a nu/nu mice model. Genome-wide profiling of MDA-MB-231 cells expressing miR-204 revealed changes in the expression of hundred cancer-related genes. Of these, we focused on the study of pro-angiogenic ANGPT1 and TGFβR2. Functional analysis using luciferase reporter and rescue assays confirmed that ANGPT1 and TGFβR2 are novel effectors downstream of miR-204. Accordingly, an inverse correlation between miR-204 and ANGPT1/TGFβR2 expression was found in breast tumors. Knockdown of TGFβR2, but not ANGPT1, impairs cell proliferation and migration whereas inhibition of both genes inhibits angiogenesis. Taken altogether, our findings reveal a novel role for miR-204/ANGPT1/TGFβR2 axis in tumor angiogenesis. We propose that therapeutic manipulation of miR-204 levels may represent a promising approach in breast cancer.
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Affiliation(s)
- Ali Flores-Pérez
- Posgrado en Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, Ciudad de México, México
| | - Laurence A Marchat
- Programa en Biomedicina Molecular y Red de Biotecnología, Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, Ciudad de México, México
| | | | | | | | - Elena Aréchaga Ocampo
- Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana, Ciudad de México, México
| | - Mónica Sierra Martínez
- Laboratorio de Genética y Diagnóstico Molecular, Hospital Juárez, Ciudad de México, México
| | - Carlos Palma-Flores
- Posgrado en Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, Ciudad de México, México
| | - Miguel A Fonseca-Sánchez
- Departamento de Genética Humana, Hospital General de Mexico "Dr Eduardo Liceaga", Ciudad de México, México
| | - Horacio Astudillo-de la Vega
- Laboratorio de Investigación en Cáncer Translacional y Terapia Celular, Centro Médico Siglo XXI, Ciudad de México, México
| | - Erika Ruíz-García
- Laboratorio de Medicina Translacional, Instituto Nacional de Cancerología, Ciudad de México, México
| | | | - Carlos Pérez-Plasencia
- Laboratorio de Genómica, Instituto Nacional de Cancerología, Ciudad de México, México; Universidad Nacional Autónoma de México UNAM, FES-Iztacala, UBIMED, Tlalnepantla, Estado de México, México
| | - María L Streber
- Laboratorio de Investigación Experimental y Animal. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Ciudad de México, México
| | - César López-Camarillo
- Posgrado en Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, Ciudad de México, México
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20
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Waseem M, Khan I, Iqbal H, Eijaz S, Usman S, Ahmed N, Alam G, Salim A. Hypoxic Preconditioning Improves the Therapeutic Potential of Aging Bone Marrow Mesenchymal Stem Cells in Streptozotocin-Induced Type-1 Diabetic Mice. Cell Reprogram 2016; 18:344-355. [PMID: 27500307 DOI: 10.1089/cell.2016.0002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Insulin replacement is the current therapeutic option for type-1 diabetes. However, exogenous insulin cannot precisely represent the normal pattern of insulin secretion. Another therapeutic strategy is transplantation of pancreatic islets, but this is limited by immune rejection, intrinsic complications, and lack of donor availability. Stem cell therapy that results in the regeneration of insulin-producing cells represents an attractive choice. However, with advancing age, stem cells also undergo senescence, which leads to changes in the function of various cellular processes that result in a decrease in the regeneration potential of these aging stem cells. In this study, the effect of young and aging mesenchymal stem cells (MSCs) on the regeneration of pancreatic beta cells in streptozotocin (STZ)-induced type-1 diabetic mice was observed after hypoxic preconditioning. Hypoxia was chemically induced by 2, 4-dinitrophenol (DNP). Plasma insulin and glucose levels were measured at various time intervals, and pancreatic sections were analyzed histochemically. The effect of DNP was also analyzed on apoptosis of MSCs by flow cytometry and on gene expression of certain growth factors by quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR). We observed that hypoxic preconditioning caused changes in the gene expression levels of growth factors in both young and aging MSCs. Young MSCs showed significant regeneration potential compared with the aging cells in vivo. However, hypoxic preconditioning was able to improve the regeneration potential of aging MSCs. It is concluded from the present study that the regeneration potential of aging MSCs into pancreatic β-cells can be enhanced by hypoxic preconditioning, which causes changes in the gene expression of certain growth factors.
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Affiliation(s)
- Muhammad Waseem
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
| | - Irfan Khan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
| | - Hana'a Iqbal
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
| | - Sana Eijaz
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
| | - Shumaila Usman
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
| | - Nazia Ahmed
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
| | - Gulzar Alam
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
| | - Asmat Salim
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences (ICCBS), University of Karachi , Karachi, Pakistan
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21
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Singh S, Manson SR, Lee H, Kim Y, Liu T, Guo Q, Geminiani JJ, Austin PF, Chen YM. Tubular Overexpression of Angiopoietin-1 Attenuates Renal Fibrosis. PLoS One 2016; 11:e0158908. [PMID: 27454431 PMCID: PMC4959721 DOI: 10.1371/journal.pone.0158908] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 06/23/2016] [Indexed: 01/22/2023] Open
Abstract
Emerging evidence has highlighted the pivotal role of microvasculature injury in the development and progression of renal fibrosis. Angiopoietin-1 (Ang-1) is a secreted vascular growth factor that binds to the endothelial-specific Tie2 receptor. Ang-1/Tie2 signaling is critical for regulating blood vessel development and modulating vascular response after injury, but is dispensable in mature, quiescent vessels. Although dysregulation of vascular endothelial growth factor (VEGF) signaling has been well studied in renal pathologies, much less is known about the role of the Ang-1/Tie2 pathway in renal interstitial fibrosis. Previous studies have shown contradicting effects of overexpressing Ang-1 systemically on renal tubulointerstitial fibrosis when different engineered forms of Ang-1 are used. Here, we investigated the impact of site-directed expression of native Ang-1 on the renal fibrogenic process and peritubular capillary network by exploiting a conditional transgenic mouse system [Pax8-rtTA/(TetO)7 Ang-1] that allows increased tubular Ang-1 production in adult mice. Using a murine unilateral ureteral obstruction (UUO) fibrosis model, we demonstrate that targeted Ang-1 overexpression attenuates myofibroblast activation and interstitial collagen I accumulation, inhibits the upregulation of transforming growth factor β1 and subsequent phosphorylation of Smad 2/3, dampens renal inflammation, and stimulates the growth of peritubular capillaries in the obstructed kidney. Our results suggest that Ang-1 is a potential therapeutic agent for targeting microvasculature injury in renal fibrosis without compromising the physiologically normal vasculature in humans.
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Affiliation(s)
- Sudhir Singh
- Division of Nephrology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Scott R. Manson
- Division of Urology, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Heedoo Lee
- Division of Nephrology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Yeawon Kim
- Division of Nephrology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Tuoen Liu
- Oncology Division, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Qiusha Guo
- Division of Urology, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Julio J. Geminiani
- Division of Urology, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Paul F. Austin
- Division of Urology, Department of Surgery, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Ying Maggie Chen
- Division of Nephrology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO, United States of America
- * E-mail:
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22
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Molecular Changes Associated with the Protective Effects of Angiopoietin-1 During Blood-Brain Barrier Breakdown Post-Injury. Mol Neurobiol 2016; 54:4232-4242. [DOI: 10.1007/s12035-016-9973-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 06/09/2016] [Indexed: 11/30/2022]
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23
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Bi X, Niu J, Ding W, Zhang M, Yang M, Gu Y. Angiopoietin-1 attenuates angiotensin II-induced ER stress in glomerular endothelial cells via a Tie2 receptor/ERK1/2-p38 MAPK-dependent mechanism. Mol Cell Endocrinol 2016; 428:118-32. [PMID: 27033326 DOI: 10.1016/j.mce.2016.03.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/13/2016] [Accepted: 03/21/2016] [Indexed: 12/11/2022]
Abstract
Research has indicated that endoplasmic reticulum (ER) stress in endothelial cells affects vascular pathologies and induces cellular dysfunction and apoptosis. Angiopoietin1 (Angpt1) has been shown to have therapeutic potential in some vascular diseases, including chronic kidney disease. This study showed that Angpt1 is a powerful factor that attenuated ER stress-induced cellular dysfunction and apoptosis in glomerular endothelial cells (GEnCs). Furthermore, Angpt1 significantly decreased the angiotensin II (Ang II)-induced expression of the ER stress response proteins GRP78, GRP94, p-PERK and CHOP. These results suggest that the Angpt1-mediated cellular protection may occur downstream of the ER stress response. In addition, both specific inhibitors and siRNAs for Tie2 reversed these changes, implying the importance of Tie2 receptor activation in the signalling pathways that prevent ER stress. The protective effects of Angpt1 are related to the activation of two downstream signalling pathways, ERK1/2 and p38 MAPK. The inhibition of these pathways with specific inhibitors, PD98059 and SB203580, respectively, partially increased the expression of chaperones that assist in folding proteins in the ER and reduce the protective effects of Angpt1. In conclusion, Angpt1 attenuated ER stress-induced cellular dysfunction and apoptosis via the Tie2 receptor/ERK1/2-p38 MAPK pathways in GEnCs. This study may provide insights into a novel underlying mechanism and a strategy for alleviating ER stress-induced injury.
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Affiliation(s)
- Xiao Bi
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Jianying Niu
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Wei Ding
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Minmin Zhang
- Division of Nephrology, Huashan Hospital, Fudan University, Shanghai, China
| | - Min Yang
- Division of Nephrology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China.
| | - Yong Gu
- Division of Nephrology, Huashan Hospital, Fudan University, Shanghai, China.
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Laube M, Stolzing A, Thome UH, Fabian C. Therapeutic potential of mesenchymal stem cells for pulmonary complications associated with preterm birth. Int J Biochem Cell Biol 2016; 74:18-32. [PMID: 26928452 DOI: 10.1016/j.biocel.2016.02.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 02/23/2016] [Accepted: 02/25/2016] [Indexed: 12/22/2022]
Abstract
Preterm infants frequently suffer from pulmonary complications resulting in significant morbidity and mortality. Physiological and structural lung immaturity impairs perinatal lung transition to air breathing resulting in respiratory distress. Mechanical ventilation and oxygen supplementation ensure sufficient oxygen supply but enhance inflammatory processes which might lead to the establishment of a chronic lung disease called bronchopulmonary dysplasia (BPD). Current therapeutic options to prevent or treat BPD are limited and have salient side effects, highlighting the need for new therapeutic approaches. Mesenchymal stem cells (MSCs) have demonstrated therapeutic potential in animal models of BPD. This review focuses on MSC-based therapeutic approaches to treat pulmonary complications and critically compares results obtained in BPD models. Thereby bottlenecks in the translational systems are identified that are preventing progress in combating BPD. Notably, current animal models closely resemble the so-called "old" BPD with profound inflammation and injury, whereas clinical improvements shifted disease pathology towards a "new" BPD in which arrest of lung maturation predominates. Future studies need to evaluate the utility of MSC-based therapies in animal models resembling the "new" BPD though promising in vitro evidence suggests that MSCs do possess the potential to stimulate lung maturation. Furthermore, we address the mode-of-action of MSC-based therapies with regard to lung development and inflammation/fibrosis. Their therapeutic efficacy is mainly attributed to an enhancement of regeneration and immunomodulation due to paracrine effects. In addition, we discuss current improvement strategies by genetic modifications or precondition of MSCs to enhance their therapeutic efficacy which could also prove beneficial for BPD therapies.
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Affiliation(s)
- Mandy Laube
- Center for Pediatric Research Leipzig, Hospital for Children & Adolescents, Division of Neonatology, University of Leipzig, Leipzig, Germany.
| | - Alexandra Stolzing
- Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany; Loughborough University, Wolfson School of Mechanical and Manufacturing Engineering, Centre for Biological Engineering, Loughborough, UK.
| | - Ulrich H Thome
- Center for Pediatric Research Leipzig, Hospital for Children & Adolescents, Division of Neonatology, University of Leipzig, Leipzig, Germany.
| | - Claire Fabian
- Fraunhofer Institute for Cell Therapy and Immunology, Leipzig, Germany; Interdisciplinary Centre for Bioinformatics, University of Leipzig, Leipzig, Germany.
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Zeng H, He X, Tuo QH, Liao DF, Zhang GQ, Chen JX. LPS causes pericyte loss and microvascular dysfunction via disruption of Sirt3/angiopoietins/Tie-2 and HIF-2α/Notch3 pathways. Sci Rep 2016; 6:20931. [PMID: 26868537 PMCID: PMC4751495 DOI: 10.1038/srep20931] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 01/13/2016] [Indexed: 12/17/2022] Open
Abstract
Recent studies reveal a crucial role of pericyte loss in sepsis-associated microvascular dysfunction. Sirtuin 3 (SIRT3) mediates histone protein post-translational modification related to aging and ischemic disease. This study investigated the involvement of SIRT3 in LPS-induced pericyte loss and microvascular dysfunction. Mice were exposed to LPS, expression of Sirt3, HIF-2α, Notch3 and angiopoietins/Tie-2, pericyte/endothelial (EC) coverage and vascular permeability were assessed. Mice treated with LPS significantly reduced the expression of SIRT3, HIF-2α and Notch3 in the lung. Furthermore, exposure to LPS increased Ang-2 while inhibited Ang-1/Tie-2 expression with a reduced pericyte/EC coverage. Intriguingly, knockout of Sirt3 upregulated Ang-2, but downregulated Tie-2 and HIF-2α/Notch3 expression which resulted in a dramatic reduction of pericyte/EC coverage and exacerbation of LPS-induced vascular leakage. Conversely, overexpression of Sirt3 reduced Ang-2 expression and increased Ang-1/Tie-2 and HIF-2α/Notch3 expression in the LPS treated mice. Overexpression of Sirt3 further prevented LPS-induced pericyte loss and vascular leakage. This was accompanied by a significant reduction of the mortality rate. Specific knockout of prolyl hydroxylase-2 (PHD2) increased HIF-2α/Notch3 expression, improved pericyte/EC coverage and reduced the mortality rate in the LPS-treated mice. Our study demonstrates the importance of SIRT3 in preserving vascular integrity by targeting pericytes in the setting of LPS-induced sepsis.
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Affiliation(s)
- Heng Zeng
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, School of Medicine, Jackson, MS, 39216, USA
| | - Xiaochen He
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, School of Medicine, Jackson, MS, 39216, USA
| | - Qin-Hui Tuo
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Duan-Fang Liao
- School of Integrated Chinese and Western Medicine, Hunan University of Chinese Medicine, Changsha, Hunan, 410208, China
| | - Guo-Qiang Zhang
- Emergency Department of China-Japan Friendship Hospital, Beijing, 100029, China
| | - Jian-Xiong Chen
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, School of Medicine, Jackson, MS, 39216, USA
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Nemska S, Daubeuf F, Frossard N. Revascularization of the graft in obliterative bronchiolitis after heterotopic tracheal transplantation. Physiol Rep 2016; 4:e12690. [PMID: 26908711 PMCID: PMC4816893 DOI: 10.14814/phy2.12690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 12/21/2015] [Accepted: 12/23/2015] [Indexed: 01/12/2023] Open
Abstract
Obliterative bronchiolitis is the principal long-term problem for lung transplant patients. One of the simplest and most reproducible animal models of obliterative bronchiolitis is heterotopic tracheal transplantation in subcutaneous tissue, where the graft is not primarily vascularized. We demonstrate here the rapid graft revascularization and the kinetics of expression of its angiogenic and lymphatic factors. We performed iso- and allotracheal transplantations harvested on day 0-21. The number of functional blood vessels, quantified after intravenous biotinylated dextran administration, increased from D0 (0 for both iso- and allografts) to D21 (44 ± 8 vessels/mm(2) in isografts and 22 ± 3 in allografts, P < 0.001 for both vs. D0). VEGF mRNA expression assessed by qPCR peaked on D1 (4.3-fold increase in isografts and 4.0-fold in allografts, P < 0.0001 for both vs. D0), but receded thereafter. Angiopoietin-1, involved in the maturation of the neoformed vessels, increased later on, by 6.2-fold (P < 0.05) in isografts and 11.5-fold in allografts (P < 0.001) by D21, and angiopoietin-2 by 7.8-fold in isografts (P < 0.05) and 13.8-fold in allografts (P < 0.01). Although always present in the iso- and allografts, there were significantly more and larger LYVE1(+) lymphatic vessels at D21 in allografts than in isografts. Thus, we demonstrate that tracheal grafts are rapidly revascularized by functional blood and lymphatic vessels, due to early VEGF and subsequent angiopoietins expression, which is a new advantage of this model, in addition to its ease of use, reproducibility, and viability in the absence of immunosuppressive treatment.
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Affiliation(s)
- Simona Nemska
- Laboratoire d'Innovation Thérapeutique, Unité Mixte de Recherche 7200 Centre National de la Recherche Scientifique-Université de Strasbourg and Laboratoire d'Excellence MEDALIS Faculté de Pharmacie, Illkirch, France
| | - François Daubeuf
- Laboratoire d'Innovation Thérapeutique, Unité Mixte de Recherche 7200 Centre National de la Recherche Scientifique-Université de Strasbourg and Laboratoire d'Excellence MEDALIS Faculté de Pharmacie, Illkirch, France
| | - Nelly Frossard
- Laboratoire d'Innovation Thérapeutique, Unité Mixte de Recherche 7200 Centre National de la Recherche Scientifique-Université de Strasbourg and Laboratoire d'Excellence MEDALIS Faculté de Pharmacie, Illkirch, France
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Human breast cancer cell death induced by BnSP-6, a Lys-49 PLA2 homologue from Bothrops pauloensis venom. Int J Biol Macromol 2016; 82:671-7. [DOI: 10.1016/j.ijbiomac.2015.10.080] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/23/2015] [Accepted: 10/26/2015] [Indexed: 01/08/2023]
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El-Nabarawy EA, El-Hanafy GM, Rashed LA, Yasin FS. Expression of angiopoietin-1, angiopoietin-2, and their receptor Tie2 in verruca vulgaris (common skin warts). Int J Dermatol 2015; 55:e327-31. [PMID: 26695562 DOI: 10.1111/ijd.13191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Revised: 08/15/2015] [Accepted: 08/22/2015] [Indexed: 01/20/2023]
Abstract
BACKGROUND Angiogenesis and vasodilatation are reported associated with the development of verruca vulgaris, yet vascular endothelial growth factor overexpression was not detected in the lesions of common warts. Angiopoietins, as angiogenesis factors, have not been studied before in warts. OBJECTIVES To assess tissue expression of angiopoietin 1 (Ang1), angiopoietin 2 (Ang2), and their receptor Tie2 in the lesions of common warts to try to identify their role as pro-angiogenic factors in the development of these lesions. PATIENTS AND METHODS Fifty patients with common skin warts and 50 age- and sex-matched controls were included in this study. Four millimeter punch skin biopsies were taken from warts and from normal skin of controls for the detection of gene expression of Ang1, Ang2, and Tie2 using real-time polymerase chain reaction. RESULTS The mean levels of Ang1, Ang2, and Tie2 were significantly higher in the lesions of common warts compared to the normal skin of controls (P < 0.001 for all). CONCLUSIONS Upregulation of Ang1, Ang2, and Tie2 seems to play a possible role in the angiogenesis associated with common skin warts.
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Affiliation(s)
- Eman A El-Nabarawy
- Department of Dermatology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Ghada M El-Hanafy
- Department of Dermatology, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Laila A Rashed
- Department ofMedical Biochemistry, Faculty of Medicine, Cairo University, Cairo, Egypt
| | - Fatma S Yasin
- Department of Dermatology, Bani Sweif Hospital, Cairo, Egypt
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Ho MSH, Mei SHJ, Stewart DJ. The Immunomodulatory and Therapeutic Effects of Mesenchymal Stromal Cells for Acute Lung Injury and Sepsis. J Cell Physiol 2015; 230:2606-17. [PMID: 25913273 DOI: 10.1002/jcp.25028] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 04/21/2015] [Indexed: 12/20/2022]
Abstract
It is increasingly recognized that immunomodulation represents an important mechanism underlying the benefits of many stem cell therapies, rather than the classical paradigm of transdifferentiation and cell replacement. In the former paradigm, the beneficial effects of cell therapy result from paracrine mechanism(s) and/or cell-cell interaction as opposed to direct engraftment and repair of diseased tissue and/or dysfunctional organs. Depending on the cell type used, components of the secretome, including microRNA (miRNA) and extracellular vesicles, may be able to either activate or suppress the immune system even without direct immune cell contact. Mesenchymal stromal cells (MSCs), also referred to as mesenchymal stem cells, are found not only in the bone marrow, but also in a wide variety of organs and tissues. In addition to any direct stem cell activities, MSCs were the first stem cells recognized to modulate immune response, and therefore they will be the focus of this review. Specifically, MSCs appear to be able to effectively attenuate acute and protracted inflammation via interactions with components of both innate and adaptive immune systems. To date, this capacity has been exploited in a large number of preclinical studies and MSC immunomodulatory therapy has been attempted with various degrees of success in a relatively large number of clinical trials. Here, we will explore the various mechanism employed by MSCs to effect immunosuppression as well as review the current status of its use to treat excessive inflammation in the context of acute lung injury (ALI) and sepsis in both preclinical and clinical settings.
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Affiliation(s)
- Mirabelle S H Ho
- Sinclair Centre for Regenerative Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario.,Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario
| | - Shirley H J Mei
- Sinclair Centre for Regenerative Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario
| | - Duncan J Stewart
- Sinclair Centre for Regenerative Medicine, Ottawa Hospital Research Institute, Ottawa, Ontario.,Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario
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Abstract
Apoptosis is a carefully choreographed process of cellular self-destruction in the absence of inflammation. During the death process, apoptotic cells actively communicate with their environment, signaling to both their immediate neighbors as well as distant sentinels. Some of these signals direct the anti-inflammatory immune response, instructing specific subsets of phagocytes to participate in the limited and careful clearance of dying cellular debris. These immunomodulatory signals can also regulate the activation state of the engulfing phagocytes. Other signals derived from apoptotic cells contribute to tissue growth control with the common goal of maintaining tissue integrity. Derangements in these growth control signals during prolonged apoptosis can lead to excessive cell loss or proliferation. Here, we highlight some of the most intriguing signals produced by apoptotic cells during the course of normal development as well as during physiological disturbances such as atherosclerosis and cancer.
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Nishimatsu H, Suzuki E, Saito Y, Niimi A, Nomiya A, Yamada D, Homma Y. Neuromedin B Restores Erectile Function by Protecting the Cavernous Body and the Nitrergic Nerves from Injury in a Diabetic Rat Model. PLoS One 2015. [PMID: 26207818 PMCID: PMC4514746 DOI: 10.1371/journal.pone.0133874] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Erectile dysfunction (ED) is a major health problem worldwide and affects approximately 75% of diabetic patients, likely due to severely damaged cavernous body. While screening for cytokines produced by adipose tissue-derived stem cells, we detected neuromedin B (NMB). To explore a potential treatment option for ED, we examined whether NMB was capable of restoring erectile function. We also examined the potential mechanism by which NMB could restore erectile function. Male Wistar rats were injected with streptozotocin (STZ) to induce diabetes. An adenovirus expressing NMB (AdNMB) was injected into the penis 6 weeks after STZ administration. Four weeks after the injection of AdNMB, erectile function, penile histology, and protein expression were analyzed. As assessed by the measurement of intracavernous pressure, AdNMB injection significantly restored erectile function compared with the injection of an adenovirus expressing green fluorescent protein. This restoration was associated with conservation of the cavernous body structure and neural nitric oxide synthase (nNOS)-expressing nerves, together with recovery of α-smooth muscle actin, vascular endothelial-cadherin, and nNOS expression. Furthermore, NMB significantly stimulated the survival of SH-SY5Y cells derived from human neuroblastoma tissue with characteristics similar to neurons. Collectively, these results suggested that NMB restored erectile function via protection of the cavernous body from injury and stimulation of the survival of the associated nerves. NMB may be useful to treat ED patients with a severely damaged cavernous body.
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Affiliation(s)
- Hiroaki Nishimatsu
- The Department of Urology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8655, Japan
| | - Etsu Suzuki
- Institute of Medical Science, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, 216–8512, Japan
- * E-mail:
| | - Yasuho Saito
- The Department of Urology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8655, Japan
| | - Aya Niimi
- The Department of Urology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8655, Japan
| | - Akira Nomiya
- The Department of Urology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8655, Japan
| | - Daisuke Yamada
- The Department of Urology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8655, Japan
| | - Yukio Homma
- The Department of Urology, Faculty of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113–8655, Japan
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Behaviour of endothelial cells in a tridimensional in vitro environment. BIOMED RESEARCH INTERNATIONAL 2015; 2015:630461. [PMID: 25789323 PMCID: PMC4350961 DOI: 10.1155/2015/630461] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 01/25/2015] [Accepted: 01/25/2015] [Indexed: 12/16/2022]
Abstract
Angiogenesis is a fundamental process in healing, tumor growth, and a variety of medical conditions. For this reason, in vitro angiogenesis is an area of interest for researchers. Additionally, in vitro angiogenesis is important for the survival of prevascularized tissue-engineering models. The aim of this study was to observe the self-tubular organization behaviour of endothelial cells in the self-assembly method. In this study, bilayered and dermal substitutes were prepared using the self-assembly method. Histological, immunostaining, and biochemical tests were performed. The behavioural dynamics of endothelial cells in this biological environment of supportive cells were observed, as were the steps of the in vitro angiogenic cascade with self-organizing capillary-like structures formation. The epidermal component of the substitutes was seen to promote network expansion and density. It also increased the quantity of angiogenic factors (VEGF and Ang-1) without increasing the proinflammatory factor (IL-8). In addition, the increased MMP activity contributed to matrix degradation, which facilitated capillary formation.
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Loukovaara S, Sahanne S, Jalkanen S, Yegutkin GG. Increased intravitreal adenosine 5'-triphosphate, adenosine 5'-diphosphate and adenosine 5'-monophosphate levels in patients with proliferative diabetic retinopathy. Acta Ophthalmol 2015; 93:67-73. [PMID: 25079888 DOI: 10.1111/aos.12507] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 06/04/2014] [Indexed: 12/28/2022]
Abstract
PURPOSE Extracellular purines play important role in ocular physiology, diabetes, vascular remodelling and adaptation to inflammation. This study was aimed to evaluate intravitreal purine levels in patients with diabetic retinopathy (DR) and other non-vascular vitreoretinal eye diseases. METHODS Vitreous samples were collected at the start of the three-port pars plana vitrectomy. Study group comprised 55 eyes operated due to sight-threatening forms of DR, including eyes of 24 patients with proliferative DR. Of the 143 non-diabetic controls, 112 had rhegmatogenous retinal detachment and 31 macular hole or pucker. Intravitreal purine concentrations were determined using a combination of bioluminescent [adenosine 5'-triphosphate (ATP), adenosine 5'-diphosphate (ADP)] and fluorometric [adenosine 5'-monophosphate (AMP), adenosine, inosine] enzyme-coupled sensing assays. RESULTS Compared with non-diabetic controls, DR eyes contained significantly higher (p < 0.01) concentrations of ATP (4.2 ± 0.6 versus 34.5 ± 13.7 nm; mean ± SEM), ADP (19.5 ± 2.7 versus 43.7 ± 14.5 nm) and AMP (1290 ± 115 versus 1876 ± 190 nm). Intravitreal adenosine and inosine levels varied within submicromolar to low micromolar range, and their concentrations did not differ between the groups studied. CONCLUSIONS High concentrations of intravitreal nucleotides ATP, ADP and AMP may be related to the pathogenesis of sight-threatening forms of DR.
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Affiliation(s)
- Sirpa Loukovaara
- Unit of Vitreoretinal Surgery; Department of Ophthalmology; Helsinki University Central Hospital; Helsinki Finland
| | - Sari Sahanne
- Unit of Anesthesiology and Intensive Care Medicine; Eye-ENT Hospital; Helsinki University Central Hospital; Helsinki Finland
| | - Sirpa Jalkanen
- MediCity Research Laboratory; University of Turku and Turku University Hospital; Turku Finland
- National Institute for Health and Welfare; Turku Finland
| | - Gennady G. Yegutkin
- MediCity Research Laboratory; University of Turku and Turku University Hospital; Turku Finland
- National Institute for Health and Welfare; Turku Finland
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Sato Y. Novel Link between Inhibition of Angiogenesis and Tolerance to Vascular Stress. J Atheroscler Thromb 2015; 22:327-34. [PMID: 25739825 DOI: 10.5551/jat.28902] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The functional integrity of the vascular endothelium is an essential component required for the maintenance of vascular health, thus counteracting the onset of vascular diseases, including atherosclerosis and vascular complications of diabetes. In light of this important role, the vascular endothelium is expected to have a self-defense system. One candidate factor of such a system is vasohibin-1 (VASH1), a protein that is preferentially expressed in vascular endothelial cells (ECs). The unique features of VASH1 are its anti-angiogenic activity and ability to promote the stress tolerance and survival of ECs. This review summarizes current knowledge regarding VASH1 in terms of its roles in maintaining vascular integrity and protecting the vasculature against various forms of stress.
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Affiliation(s)
- Yasufumi Sato
- Department of Vascular Biology, Institute of Development, Aging and Cancer, Tohoku University
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Temirak A, Shaker YM, Ragab FA, Ali MM, Ali HI, El Diwani HI. Part I. Synthesis, biological evaluation and docking studies of new 2-furylbenzimidazoles as antiangiogenic agents. Eur J Med Chem 2014; 87:868-80. [DOI: 10.1016/j.ejmech.2014.01.063] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 01/24/2014] [Accepted: 01/31/2014] [Indexed: 11/25/2022]
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Silpanisong J, Pearce WJ. Vasotrophic regulation of age-dependent hypoxic cerebrovascular remodeling. Curr Vasc Pharmacol 2014; 11:544-63. [PMID: 24063376 DOI: 10.2174/1570161111311050002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 06/08/2012] [Accepted: 07/12/2012] [Indexed: 02/07/2023]
Abstract
Hypoxia can induce functional and structural vascular remodeling by changing the expression of trophic factors to promote homeostasis. While most experimental approaches have been focused on functional remodeling, structural remodeling can reflect changes in the abundance and organization of vascular proteins that determine functional remodeling. Better understanding of age-dependent hypoxic macrovascular remodeling processes of the cerebral vasculature and its clinical implications require knowledge of the vasotrophic factors that influence arterial structure and function. Hypoxia can affect the expression of transcription factors, classical receptor tyrosine kinase factors, non-classical G-protein coupled factors, catecholamines, and purines. Hypoxia's remodeling effects can be mediated by Hypoxia Inducible Factor (HIF) upregulation in most vascular beds, but alterations in the expression of growth factors can also be independent of HIF. PPARγ is another transcription factor involved in hypoxic remodeling. Expression of classical receptor tyrosine kinase ligands, including vascular endothelial growth factor, platelet derived growth factor, fibroblast growth factor and angiopoietins, can be altered by hypoxia which can act simultaneously to affect remodeling. Tyrosine kinase-independent factors, such as transforming growth factor, nitric oxide, endothelin, angiotensin II, catecholamines, and purines also participate in the remodeling process. This adaptation to hypoxic stress can fundamentally change with age, resulting in different responses between fetuses and adults. Overall, these mechanisms integrate to assure that blood flow and metabolic demand are closely matched in all vascular beds and emphasize the view that the vascular wall is a highly dynamic and heterogeneous tissue with multiple cell types undergoing regular phenotypic transformation.
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Affiliation(s)
- Jinjutha Silpanisong
- Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA.
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Dying cells protect survivors from radiation-induced cell death in Drosophila. PLoS Genet 2014; 10:e1004220. [PMID: 24675716 PMCID: PMC3967929 DOI: 10.1371/journal.pgen.1004220] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 01/20/2014] [Indexed: 12/19/2022] Open
Abstract
We report a phenomenon wherein induction of cell death by a variety of means in wing imaginal discs of Drosophila larvae resulted in the activation of an anti-apoptotic microRNA, bantam. Cells in the vicinity of dying cells also become harder to kill by ionizing radiation (IR)-induced apoptosis. Both ban activation and increased protection from IR required receptor tyrosine kinase Tie, which we identified in a genetic screen for modifiers of ban. tie mutants were hypersensitive to radiation, and radiation sensitivity of tie mutants was rescued by increased ban gene dosage. We propose that dying cells activate ban in surviving cells through Tie to make the latter cells harder to kill, thereby preserving tissues and ensuring organism survival. The protective effect we report differs from classical radiation bystander effect in which neighbors of irradiated cells become more prone to death. The protective effect also differs from the previously described effect of dying cells that results in proliferation of nearby cells in Drosophila larval discs. If conserved in mammals, a phenomenon in which dying cells make the rest harder to kill by IR could have implications for treatments that involve the sequential use of cytotoxic agents and radiation therapy. In multicellular organisms where cells exist in the context of other cells, the behavior of one affects the others. The consequences of such interactions include not just cell fate choices but also life and death decisions. In the wing primordia of Drosophila melanogaster larvae, dying cells release mitogenic signals that stimulate the neighbors to proliferate. Such an effect is proposed to compensate for cell loss and help regenerate the tissue. We report here that, in the same experimental system, dying cells activate a pro-survival microRNA, bantam, in surviving cells. This results in increased protection from the killing effect of ionizing radiation (IR). Activation of ban requires tie, which encodes a receptor tyrosine kinase. tie and ban mutant larvae are hypersensitive to killing by IR, suggesting that the responses described here are important for organismal survival following radiation exposure.
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Temirak A, Shaker YM, Ragab FAF, Ali MM, Soliman SM, Mortier J, Wolber G, Ali HI, Diwani HIE. Synthesis, Biological Evaluation, and Docking Studies of New 2-Furylbenzimidazoles as Anti-Angiogenic Agents: Part II. Arch Pharm (Weinheim) 2014; 347:291-304. [DOI: 10.1002/ardp.201300356] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Revised: 11/12/2013] [Accepted: 11/15/2013] [Indexed: 01/28/2023]
Affiliation(s)
- Ahmed Temirak
- Division of Pharmaceutical and Drug Industries, Department of Chemistry of Natural and Microbial Products; National Research Center; Dokki Cairo Egypt
| | - Yasser M. Shaker
- Division of Pharmaceutical and Drug Industries, Department of Chemistry of Natural and Microbial Products; National Research Center; Dokki Cairo Egypt
| | - Fatma A. F. Ragab
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Cairo University; Giza Egypt
| | - Mamdouh M. Ali
- Division of Genetic Engineering and Biotechnology, Department of Biochemistry; National Research Center; Cairo Egypt
| | - Salwa M. Soliman
- Department of Pharmaceutical Chemistry; Institute of Pharmacy, Free University of Berlin; Berlin Germany
| | - Jeremie Mortier
- Department of Pharmaceutical Chemistry; Institute of Pharmacy, Free University of Berlin; Berlin Germany
- Department of Organic Chemistry; Free University of Berlin; Berlin Germany
| | - Gerhard Wolber
- Department of Pharmaceutical Chemistry; Institute of Pharmacy, Free University of Berlin; Berlin Germany
| | - Hamed I. Ali
- Department of Pharmaceutical Sciences; Irma Lerma Rangel College of Pharmacy, Texas A&M Health Science Center; Round Rock TX USA
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Helwan University; Cairo Egypt
| | - Hoda I. El Diwani
- Division of Pharmaceutical and Drug Industries, Department of Chemistry of Natural and Microbial Products; National Research Center; Dokki Cairo Egypt
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Gladstone M, Su TT. Radiation responses and resistance. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2013; 299:235-53. [PMID: 22959305 DOI: 10.1016/b978-0-12-394310-1.00006-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
The cytotoxic effect of ionizing radiation makes it a popular therapeutic tool against cancer. It is, however, a double-edged sword. Radiation exposure unleashes a plethora of protective and survival mechanisms that include increased proliferation, remodeling of the vasculature and altered cell motility. These mechanisms can play a pro-survival role in remaining cells, contributing to repopulation of tumors after radiation treatment. Understanding these mechanisms and finding ways to minimize their impact would improve the outcome of radiotherapy.
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Affiliation(s)
- Mara Gladstone
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO, USA
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40
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Loukovaara S, Lehti K, Robciuc A, Pessi T, Holopainen JM, Koli K, Immonen I, Keski-Oja J. Increased intravitreal angiopoietin-2 levels associated with rhegmatogenous retinal detachment. Graefes Arch Clin Exp Ophthalmol 2013; 252:881-8. [PMID: 24218041 DOI: 10.1007/s00417-013-2508-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 08/08/2013] [Accepted: 10/21/2013] [Indexed: 12/26/2022] Open
Abstract
PURPOSE To explore factors related to pathogenesis of rhegmatogenous retinal detachment (RRD) and development of proliferative vitreoretinopathy (PVR), vitreous levels of angiopoietin-1 and -2 (Ang-1 and -2), previously undefined in RRD, transforming growth factor-(TGF) β1, vascular endothelial growth factor (VEGF), erythropoietin (EPO) and proteolytic mediators of extracellular matrix remodelling (MMP-2 and -9) were compared in eyes with RRD and eyes with idiopathic macular hole or pucker. METHODS Vitreous samples were collected from 117 eyes with RRD (study group) and 40 eyes with macular hole or pucker (control group). Growth factors were measured by ELISA and matrix metalloproteinases (MMPs) by gelatin zymography. RESULTS The mean vitreous concentrations of Ang-2, MMP-2, and MMP-9 were higher (all p < 0.01), whereas concentration of VEGF was lower (p = 0.01) in eyes with RRD relative to controls. Logistic regression analysis identified Ang-2 concentration as a novel marker of RRD (p = 0.0001, OR 48.7). Ang-1, EPO, and total TGF-β1 levels were not significantly different between the groups. However, TGF-β1 and MMP-2 were increased in eyes with total RRD compared to those with local RRD (p ≤ 0.05). In eyes with PVR, no differences were observed in any studied marker as compared with non-PVR eyes. CONCLUSIONS Current results reveal Ang-2 as a key factor upregulated in RRD. It may co-operate with fibrosis-associated factors and contribute to vascular complications such as breakdown of blood-eye barrier and PVR development.
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Affiliation(s)
- Sirpa Loukovaara
- Unit of Vitreoretinal Surgery, Department of Ophthalmology, Helsinki University Central Hospital, Haartmaninkatu 4 C, 00290, Helsinki, Finland,
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Abstract
Cytokines and growth factors play an integral role in the maintenance of immune homeostasis, the generation of protective immunity, and lung reparative processes. However, the dysregulated expression of cytokines and growth factors in response to infectious or noxious insults can initiate and perpetuate deleterious lung inflammation and fibroproliferation. In this article, we will comprehensively review the contribution of individual cytokines and growth factors and cytokine networks to key pathophysiological events in human and experimental acute lung injury (ALI), including inflammatory cell recruitment and activation, alveolar epithelial injury and repair, angiogenesis, and matrix deposition and remodeling. The application of cytokines/growth factors as prognostic indicators and therapeutic targets in human ALI is explored.
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Affiliation(s)
- Jane C Deng
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, UCLA Medical Center, Los Angeles, CA, USA
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42
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Ong SP, Ng ML, Chu JJH. Differential regulation of angiopoietin 1 and angiopoietin 2 during dengue virus infection of human umbilical vein endothelial cells: implications for endothelial hyperpermeability. Med Microbiol Immunol 2013; 202:437-52. [DOI: 10.1007/s00430-013-0310-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 08/19/2013] [Indexed: 12/17/2022]
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Miklas JW, Dallabrida SM, Reis LA, Ismail N, Rupnick M, Radisic M. QHREDGS enhances tube formation, metabolism and survival of endothelial cells in collagen-chitosan hydrogels. PLoS One 2013; 8:e72956. [PMID: 24013716 PMCID: PMC3754933 DOI: 10.1371/journal.pone.0072956] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 07/22/2013] [Indexed: 12/29/2022] Open
Abstract
Cell survival in complex, vascularized tissues, has been implicated as a major bottleneck in advancement of therapies based on cardiac tissue engineering. This limitation motivates the search for small, inexpensive molecules that would simultaneously be cardio-protective and vasculogenic. Here, we present peptide sequence QHREDGS, based upon the fibrinogen-like domain of angiopoietin-1, as a prime candidate molecule. We demonstrated previously that QHREDGS improved cardiomyocyte metabolism and mitigated serum starved apoptosis. In this paper we further demonstrate the potency of QHREDGS in its ability to enhance endothelial cell survival, metabolism and tube formation. When endothelial cells were exposed to the soluble form of QHREDGS, improvements in endothelial cell barrier functionality, nitric oxide production and cell metabolism (ATP levels) in serum starved conditions were found. The functionality of the peptide was then examined when conjugated to collagen-chitosan hydrogel, a potential carrier for in vivo application. The presence of the peptide in the hydrogel mitigated paclitaxel induced apoptosis of endothelial cells in a dose dependent manner. Furthermore, the peptide modified hydrogels stimulated tube-like structure formation of encapsulated endothelial cells. When integrin αvβ3 or α5β1 were antibody blocked during cell encapsulation in peptide modified hydrogels, tube formation was abolished. Therefore, the dual protective nature of the novel peptide QHREDGS may position this peptide as an appealing augmentation for collagen-chitosan hydrogels that could be used for biomaterial delivered cell therapies in the settings of myocardial infarction.
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Affiliation(s)
- Jason W. Miklas
- The Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Susan M. Dallabrida
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Lewis A. Reis
- The Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Nesreen Ismail
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Maria Rupnick
- Brigham and Women’s Hospital, Cardiovascular Division, Boston, Massachusetts, United States of America (Affiliates of Harvard Medical School, Boston, Massachusetts, United States of America)
| | - Milica Radisic
- The Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
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Abl kinases are required for vascular function, Tie2 expression, and angiopoietin-1-mediated survival. Proc Natl Acad Sci U S A 2013; 110:12432-7. [PMID: 23840065 DOI: 10.1073/pnas.1304188110] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Endothelial dysfunction is associated with diverse cardiovascular pathologies. Here, we show a previously unappreciated role for the Abelson (Abl) family kinases (Abl and Arg) in endothelial function and the regulation of angiogenic factor pathways important for vascular homeostasis. Endothelial Abl deletion in Arg-null mice led to late-stage embryonic and perinatal lethality, with mutant mice displaying focal loss of vasculature and tissue necrosis. Loss of Abl kinases led to increased endothelial cell apoptosis both in vitro and in vivo, contributing to vascular dysfunction, infarction, and tissue damage. Mechanistically, we identify a unique dual role for Abl kinases in the regulation of angiopoietin/Tie2 protein kinase signaling. Endothelial Abl kinases modulate Tie2 expression and angiopoietin-1-mediated endothelial cell survival. These findings reveal a critical requirement for the Abl kinases in vascular development and function, which may have important implications for the clinical use of Abl kinase inhibitors.
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Paracrine activity of stem cells in therapy for acute lung injury and adult respiratory distress syndrome. J Trauma Acute Care Surg 2013; 74:1351-6. [PMID: 23609289 DOI: 10.1097/ta.0b013e318283d942] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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46
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Tsuzuki T, Okada H, Cho H, Shimoi K, Miyashiro H, Yasuda K, Kanzaki H. Divergent regulation of angiopoietin-1, angiopoietin-2, and vascular endothelial growth factor by hypoxia and female sex steroids in human endometrial stromal cells. Eur J Obstet Gynecol Reprod Biol 2013; 168:95-101. [DOI: 10.1016/j.ejogrb.2012.12.040] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 11/20/2012] [Accepted: 12/24/2012] [Indexed: 12/13/2022]
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Paracrine activity of stem cells in therapy for acute lung injury and adult respiratory distress syndrome. J Trauma Acute Care Surg 2013. [DOI: 10.1097/01586154-201305000-00024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Liu XB, Chen H, Chen HQ, Zhu MF, Hu XY, Wang YP, Jiang Z, Xu YC, Xiang MX, Wang JA. Angiopoietin-1 preconditioning enhances survival and functional recovery of mesenchymal stem cell transplantation. J Zhejiang Univ Sci B 2012; 13:616-23. [PMID: 22843181 DOI: 10.1631/jzus.b1201004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Mesenchymal stem cell (MSC) transplantation is a promising therapy for ischemic heart diseases. However, poor cell survival after transplantation greatly limits the therapeutic efficacy of MSCs. The purpose of this study was to investigate the protective effect of angiopoietin-1 (Ang1) preconditioning on MSC survival and subsequent heart function improvement after transplantation. METHODS MSCs were cultured with or without 50 ng/ml Ang1 in complete medium for 24 h prior to experiments on cell survival and transplantation. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and Hoechst staining were applied to evaluate MSC survival after serum deprivation in vitro, while cell survival in vivo was detected by terminal deoxynucleotidyl transferase biotin-dUPT nick end labeling (TUNEL) assay 24 and 72 h after transplantation. Heart function and infarct size were measured four weeks later by small animal echocardiography and Masson's trichrome staining, respectively. RESULTS Ang1 preconditioning induced Akt phosphorylation and increased expression of Bcl-2 and the ratio of Bcl-2/Bax. In comparison with non-preconditioned MSCs, Ang1-preconditioned cell survival was significantly increased while the apoptotic rate decreased in vitro. However, the PI3K/Akt pathway inhibitor, LY294002, abrogated the protective effect of Ang1 preconditioning. After transplantation, the Ang1-preconditioned-MSC group showed a lower death rate, smaller infarct size, and better heart functional recovery compared to the non-preconditioned-MSC group. CONCLUSIONS Ang1 preconditioning enhances MSC survival, contributing to further improvement of heart function.
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Affiliation(s)
- Xian-bao Liu
- Cardiovascular Key Lab of Zhejiang Province, the Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
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Palmer GM, Tiran Z, Zhou Z, Capozzi ME, Park W, Coletta C, Pyriochou A, Kliger Y, Levy O, Borukhov I, Dewhirst MW, Rotman G, Penn JS, Papapetropoulos A. A novel angiopoietin-derived peptide displays anti-angiogenic activity and inhibits tumour-induced and retinal neovascularization. Br J Pharmacol 2012; 165:1891-1903. [PMID: 21943108 DOI: 10.1111/j.1476-5381.2011.01677.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND AND PURPOSE Pathological angiogenesis is associated with various human diseases, such as cancer, autoimmune diseases and retinopathy. The angiopoietin (Ang)-Tie2 system plays critical roles in several steps of angiogenic remodelling. Here, we have investigated the anti-angiogenic effect of a novel angiopoietin-derived peptide. EXPERIMENTAL APPROACH Using computational methods, we identified peptides from helical segments within angiopoietins, which were predicted to inhibit their activity. These peptides were tested using biochemical methods and models of angiogenesis. The peptide with best efficacy, A11, was selected for further characterization as an anti-angiogenic compound. KEY RESULTS The potent anti-angiogenic activity of A11 was demonstrated in a multicellular assay of angiogenesis and in the chorioallantoic membrane model. A11 bound to angiopoietins and reduced the binding of Ang-2 to Tie2. A11 was also significantly reduced vascular density in a model of tumour-induced angiogenesis. Its ability to inhibit Ang-2 but not Ang-1-induced endothelial cell migration, and to down-regulate Tie2 levels in tumour microvessels, suggests that A11 targets the Ang-Tie2 pathway. In a rat model of oxygen-induced retinopathy, A11 strongly inhibited retinal angiogenesis. Moreover, combination of A11 with an anti-VEGF antibody showed a trend for further inhibition of angiogenesis, suggesting an additive effect. CONCLUSIONS AND IMPLICATIONS Our results indicate that A11 is a potent anti-angiogenic compound, through modulation of the Ang-Tie2 system, underlining its potential as a therapeutic agent for the treatment of ocular and tumour neovascularization, as well as other pathological conditions that are dependent on angiogenesis.
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Affiliation(s)
- G M Palmer
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Z Tiran
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Z Zhou
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - M E Capozzi
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - W Park
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - C Coletta
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - A Pyriochou
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Y Kliger
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - O Levy
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - I Borukhov
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - M W Dewhirst
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - G Rotman
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - J S Penn
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - A Papapetropoulos
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USACompugen Ltd, Tel-Aviv, IsraelLaboratory for Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras, GreeceDepartment of Ophthalmology and Visual Sciences, Vanderbilt University School of Medicine, Nashville, TN, USA
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Huang SW, Lien JC, Kuo SC, Huang TF. Antiangiogenic mechanisms of PJ-8, a novel inhibitor of vascular endothelial growth factor receptor signaling. Carcinogenesis 2012; 33:1022-30. [DOI: 10.1093/carcin/bgs127] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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