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Ischemia angiogenesis

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https://www.readbyqxmd.com/read/28424975/etv-2-activated-proliferation-of-endothelial-cells-and-attenuated-acute-hindlimb-ischemia-in-mice
#1
Phuc Van Pham, Ngoc Bich Vu, Hoa Trong Nguyen, Thuy Thi-Thanh Dao, Ha Thi-Ngan Le, Lan Thi Phi, Oanh Thi-Kieu Nguyen, Ngoc Kim Phan
Ischemia is the reduction of blood flow to tissues by injury of blood vessels. Depending on the sites of tissues and grade of ischemia, ischemia can cause many serious complications. This study aimed to evaluate the effects of the E-twenty six (ETS) factor Ets variant 2 (ETV2) gene expression in angiogenesis and the effect of ETV2 gene therapy in a mouse model of hindlimb ischemia. The role of ETV2 on endothelial cell proliferation was evaluated in vitro. Knockdown of ETV2 expression was done using short hairpin RNA (shRNA) lentiviral viral particles...
April 19, 2017: In Vitro Cellular & Developmental Biology. Animal
https://www.readbyqxmd.com/read/28424623/notch-signaling-in-ischemic-damage-and-fibrosis-evidence-and-clues-from-the-heart
#2
REVIEW
Silvia Nistri, Chiara Sassoli, Daniele Bani
Notch signaling is a major intercellular coordination mechanism highly conserved throughout evolution. In vertebrates, Notch signaling is physiologically involved in embryo development, including mesenchymal cell commitment, formation of heart tissues and angiogenesis. In post-natal life, Notch signaling is maintained as a key mechanism of cell-cell communication and its dysregulations have been found in pathological conditions such as ischemic and fibrotic diseases. In the heart, Notch takes part in the protective response to ischemia, being involved in pre- and post-conditioning, reduction of reperfusion-induced oxidative stress and myocardial damage, and cardiomyogenesis...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28417947/pro-angiogenic-effects-of-low-dose-ethoxidine-in-a-murine-model-of-ischemic-hindlimb-correlation-between-ethoxidine-levels-and-increased-activation-of-the-nitric-oxide-pathway
#3
Nicolas Clere, Kim Hung Thien To, Samuel Legeay, Samuel Bertrand, Jean Jacques Helesbeux, Olivier Duval, Sébastien Faure
Ethoxidine, a benzo[c]phenanthridine derivative, has been identified as a potent inhibitor of topoisomerase I in cancer cell lines. Our group has reported paradoxical properties of ethoxidine in cellular processes leading to angiogenesis on endothelial cells. Because low concentration ethoxidine is able to favor angiogenesis, the present study aimed to investigate the ability of 10(-9) M ethoxidine to modulate neovascularization in a model of mouse hindlimb ischemia. After inducing unilateral hindlimb ischemia, mice were treated for 21 days with glucose 5% or with ethoxidine, to reach plasma concentrations equivalent to 10(-9) M...
April 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28407626/exogenous-mirna-146a-enhances-the-therapeutic-efficacy-of-human-mesenchymal-stem-cells-by-increasing-vascular-endothelial-growth-factor-secretion-in-the-ischemia-reperfusion-injured-heart
#4
Hyang-Hee Seo, Se-Yeon Lee, Chang Youn Lee, Ran Kim, Pilseog Kim, Sekyung Oh, Hojin Lee, Min Young Lee, Jongmin Kim, Lark Kyun Kim, Ki-Chul Hwang, Woochul Chang
Adult stem cells have been studied as a promising therapeutic modality for the functional restoration of the damaged heart. In the present study, a strategy for enhancing the angiogenic efficacy of human mesenchymal stem cells (hMSCs) using micro-RNA was examined. We investigated whether micro-RNA-146a (miR-146a) influences the secretion of vascular endothelial growth factor (VEGF) and angiogenesis of MSCs. Our data indicated that miR-146a-transfected hMSCs (hMSCmiR-146a) decreased the expression of neurofibromin 2, an inhibitor of p21-activated kinase-1 (PAK1)...
April 14, 2017: Journal of Vascular Research
https://www.readbyqxmd.com/read/28402976/apelin-13-protects-against-ischemic-blood-brain-barrier-damage-through-the-effects-of-aquaporin-4
#5
Heling Chu, Xiaobo Yang, Chuyi Huang, Zidan Gao, Yuping Tang, Qiang Dong
BACKGROUND: Apelin-13 has been found to have protective effects on many neurological diseases, including cerebral ischemia. However, whether Apelin-13 acts on blood-brain barrier (BBB) disruption following cerebral ischemia is largely unknown. Aquaporin-4 (AQP4) has a close link with BBB due to the high concentration in astrocyte foot processes and regulation of astrocytes function. Here, we aimed to test Apelin-13's effects on ischemic BBB injury and examine whether the effects were dependent on AQP4...
April 13, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/28397127/a-novel-strategy-to-enhance-angiogenesis-in-vivo-using-the-small-vegf-binding-peptide-pr1p
#6
Avner Adini, Irit Adini, Zai-Long Chi, Ratmir Derda, Amy E Birsner, Benjamin D Matthews, Robert J D'Amato
Therapeutic angiogenesis is an experimental frontier in vascular biology that seeks to deliver angiogenic growth factors to ischemic or injured tissues to promote targeted formation of new blood vessels as an alternative approach to surgical revascularization procedures. Vascular endothelial growth factor (VEGF) is a potent angiogenic signal protein that is locally upregulated at sites of tissue injury. However, therapies aimed at increasing VEGF levels experimentally by injecting VEGF gene or protein failed to improve outcomes in human trials in part due to its short half-life and systemic toxicity...
April 10, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28396199/hypoxia-response-element-regulated-mmp-9-promotes-neurological-recovery-via-glial-scar-degradation-and-angiogenesis-in-delayed-stroke
#7
Hongxia Cai, Yuanyuan Ma, Lu Jiang, Zhihao Mu, Zhen Jiang, Xiaoyan Chen, Yongting Wang, Guo-Yuan Yang, Zhijun Zhang
Matrix metalloproteinase 9 (MMP-9) plays a beneficial role in the delayed phase of middle cerebral artery occlusion (MCAO). However, the mechanism is obscure. Here, we constructed hypoxia response element (HRE)-regulated MMP-9 to explore its effect on glial scars and neurogenesis in delayed ischemic stroke. Adult male Institute of Cancer Research (ICR) mice underwent MCAO and received a stereotactic injection of lentivirus carrying HRE-MMP-9 or normal saline (NS)/lentivirus-GFP 7 days after ischemia. We found that HRE-MMP-9 improved neurological outcomes, reduced ischemia-induced brain atrophy, and degraded glial scars (p < 0...
April 7, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28396188/effects-of-nigella-sativa-extract-on-markers-of-cerebral-angiogenesis-after-global-ischemia-of-brain-in-rats
#8
Koroush Soleimannejad, Asghar Rahmani, Masoud Hatefi, Masoud Khataminia, Mohammad Reza Hafezi Ahmadi, Khairollah Asadollahi
BACKGROUND: Reduction of permanent or transient cerebral blood flow may lead to some structural and functional changes of the brain, causing high mortality and morbidity. The aim of this experimental study was to investigate the effects of hydroalcoholic extract of Nigella sativa (NS) on markers of cerebral angiogenesis in rats induced by global brain ischemia. METHODS: Thirty-two male Wistar rats (250 ± 20 g) were randomly divided into 4 groups: group 1, control group receiving only normal saline; group 2, sham group undergoing surgery and stroke induction without treatment; and groups 3 and 4 treated with 10 and 20 mg/kg NS, respectively, after induction of stroke...
April 7, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28392885/the-transcription-factor-bach1-suppresses-the-developmental-angiogenesis-of-zebrafish
#9
Li Jiang, Meng Yin, Jie Xu, Mengping Jia, Shaoyang Sun, Xu Wang, Jianyi Zhang, Dan Meng
Bach1 disrupts Wnt/β-catenin signaling, reduces the proliferation, migration, and tube formation activity of endothelial cells (ECs), and suppresses angiogenesis in mice with surgically induced hind-limb ischemia (HLI). However, the function of Bach1 during developmental angiogenesis in zebrafish remains unclear. Here, we found that zebrafish Bach1 was expressed ubiquitously during early embryonic development in zebrafish. Bach1b mRNA injection of Tg(fli1:gfp) fish disrupted intersegmental vessels (ISV) and dorsal longitudinal anastomotic vessels (DLAV) and suppressed endogenous Wnt/β-catenin signaling and Wnt8a stimulated vascular endothelial growth factor (VEGF) and interleukin-8 (IL-8) gene expression at early embryonic stages of zebrafish...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28384353/generation-and-characterization-of-epoxide-hydrolase-3-ephx3-deficient-mice
#10
Samantha L Hoopes, Artiom Gruzdev, Matthew L Edin, Joan P Graves, J Alyce Bradbury, Gordon P Flake, Fred B Lih, Laura M DeGraff, Darryl C Zeldin
Cytochrome P450 (CYP) epoxygenases metabolize arachidonic acid into epoxyeicosatrienoic acids (EETs), which play an important role in blood pressure regulation, protection against ischemia-reperfusion injury, angiogenesis, and inflammation. Epoxide hydrolases metabolize EETs to their corresponding diols (dihydroxyeicosatrienoic acids; DHETs) which are biologically less active. Microsomal epoxide hydrolase (EPHX1, mEH) and soluble epoxide hydrolase (EPHX2, sEH) were identified >30 years ago and are capable of hydrolyzing EETs to DHETs...
2017: PloS One
https://www.readbyqxmd.com/read/28376567/hypoxia-inducible-factor-1-alpha-potentiates-jagged-1-mediated-angiogenesis-by-mesenchymal-stem-cell-derived-exosomes
#11
Hernán Gonzalez-King, Nahuel A García, Imelda Ontoria-Oviedo, María Ciria, José Anastasio Montero, Pilar Sepúlveda
Insufficient vessel growth associated with ischemia remains an unresolved issue in vascular medicine. Mesenchymal stem cells (MSCs) have been shown to promote angiogenesis via a mechanism that is potentiated by hypoxia. Overexpression of hypoxia inducible factor (HIF)-1α in MSCs improves their therapeutic potential by inducing angiogenesis in transplanted tissues. Here we studied the contribution of exosomes released by HIF-1α-overexpressing donor MSCs (HIF-MSC) to angiogenesis by endothelial cells. Exosome secretion was enhanced in HIF-MSC...
April 4, 2017: Stem Cells
https://www.readbyqxmd.com/read/28365482/distributed-vasculogenesis-from-modular-agarose-hydroxyapatite-fibrinogen-microbeads
#12
Ana Y Rioja, Ethan L H Daley, Julia C Habif, Andrew J Putnam, Jan P Stegemann
Critical limb ischemia impairs circulation to the extremities, causing pain, disrupted wound healing, and potential tissue necrosis. Therapeutic angiogenesis seeks to repair the damaged microvasculature directly to restore blood flow. In this study, we developed modular, micro-scale constructs designed to possess robust handling qualities, allow in vitro pre-culture, and promote microvasculature formation. The microbead matrix consisted of an agarose (AG) base to prevent aggregation, combined with cell-adhesive components of fibrinogen (FGN) and/or hydroxyapatite (HA)...
March 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28357515/clinical-features-and-predictors-of-patients-with-critical-limb-ischemia-who-responded-to-autologous-mononuclear-cell-transplantation-for-therapeutic-angiogenesis
#13
Naoyoshi Aoyama, Makoto Nishinari, Shinichi Ohtani, Akifumi Kanai, Chiharu Noda, Mitsuhiro Hirata, Akira Miyamoto, Masafumi Watanabe, Tohru Minamino, Tohru Izumi, Jyunya Ako
The clinical features of patients with critical limb ischemia (CLI) who responded to angiogenesis using autologous peripheral blood mononuclear cell transplantation (PB-MNC) have not yet been fully characterized, and there are no useful predictors to judge the curative effect in the early period after PB-MNC. This study sought to clarify the clinical features and predictors in patients with CLI who were successfully treated using PB-MNC. 30 consecutive patients [arteriosclerosis obliterans: 24 patients, thromboangiitis obliterans: 6 patients] who were diagnosed with major amputation despite maximal medical therapy were enrolled in this study...
March 29, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28350193/reconstitution-of-hur-inhibited-cugbp1-expression-protects-cardiomyocytes-from-acute-myocardial-infarction-induced-injury
#14
Lei Gu, Huiwen Wang, Jun Wang, Yuting Guo, Yinglong Tang, Yang Mao, Lijuan Chen, Hua Lou, Guangju Ji
AIM: Myocardial infarction (MI) is one of the leading causes of death in elderly people. Expanding the knowledge of the molecular mechanisms underlying MI is of profound importance to developing a cure for MI. The CUGBP- and ETR-3-like factor (CELF) proteins, a family of RNA-binding proteins, play key roles in RNA metabolism. To determine the functions and molecular mechanisms of CELF proteins in MI, an animal model of acute myocardial infarction (AMI) was used in our study. RESULTS: We found that the CUG triplet repeat RNA-binding protein 1 (CUGBP1)/CELF1 expression levels were decreased in AMI-injured hearts, and further studies showed that two highly conserved adenylate-uridylate-rich (AU-rich) elements in the 3'UTR of CUGBP1 were responsible for the decreased CUGBP1 expression...
March 28, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28333381/protective-actions-of-h2s-in-acute-myocardial-infarction-and-heart-failure
#15
Erminia Donnarumma, Rishi K Trivedi, David J Lefer
Hydrogen sulfide (H2S) was identified as the third gasotransmitter in 1996 following the discoveries of the biological importance of nitric oxide and carbon monoxide. Although H2S has long been considered a highly toxic gas, the discovery of its presence and enzymatic production in mammalian tissues supports a critical role for this physiological signaling molecule. H2S is synthesized endogenously by three enzymes: cystathionine β-synthase, cystathionine-γ-lyase, and 3-mercaptopyruvate sulfurtransferase. H2S plays a pivotal role in the regulation of cardiovascular function as H2S has been shown to modulate: vasodilation, angiogenesis, inflammation, oxidative stress, and apoptosis...
March 16, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28325782/aibp-limits-angiogenesis-through-%C3%AE-secretase-mediated-upregulation-of-notch-signaling
#16
Renfang Mao, Shu Meng, Qilin Gu, Raquel Araujo-Gutierrez, Sandeep Kumar, Qing Yan, Felicidad Almazan, Keith A Youker, Yingbin Fu, Henry J Pownall, John P Cooke, Yury I Miller, Longhou Fang
Rationale: Angiogenesis improves perfusion to the ischemic tissue following acute vascular obstruction. Angiogenesis in pathophysiological settings reactivates signaling pathways involved in developmental angiogenesis. We showed previously that apoA-I binding protein (AIBP)-regulated cholesterol efflux in endothelial cells (ECs) controls zebrafish embryonic angiogenesis. Objective: This study is to determine whether loss of AIBP affects angiogenesis in mice during development and under pathological conditions, and to explore the underlying molecular mechanism...
March 21, 2017: Circulation Research
https://www.readbyqxmd.com/read/28320183/ischemic-optic-neuropathy-as-a-model-of-neurodegenerative-disorder-a-review-of-pathogenic-mechanism-of-axonal-degeneration-and-the-role-of-neuroprotection
#17
REVIEW
Saba Khalilpour, Shahrzad Latifi, Ghazaleh Behnammanesh, Amin Malik Shah Abdul Majid, Aman Shah Abdul Majid, Ali Tamayol
Optic neuropathy is a neurodegenerative disease which involves optic nerve injury. It is caused by acute or intermittent insults leading to visual dysfunction. There are number of factors, responsible for optic neuropathy, and the optic nerve axon is affected in all type which causes the loss of retinal ganglion cells. In this review we will highlight various mechanisms involved in the cell loss cascades during axonal degeneration as well as ischemic optic neuropathy. These mechanisms include oxidative stress, excitotoxicity, angiogenesis, neuroinflammation and apoptosis following retinal ischemia...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28316070/the-involvement-of-thrombin-in-the-pathogenesis-of-glioblastoma
#18
REVIEW
Harald Krenzlin, Viola Lorenz, Beat Alessandri
Prothrombin and its active derivative thrombin are key members of the coagulation system. The only site of extra-hepatic thrombin expression is the central nervous system (CNS), where it is involved in brain development, protection, and regeneration. Thrombin affects various degenerative and ischemic CNS diseases like Alzheimer's, multiple sclerosis, cerebral ischemia, and hemorrhage in a dose dependent manner. Additionally, the association of thrombin with various malignancies has recently become evident. Thrombin facilitates the interaction between tumor cells with platelets, endothelial cells, and the adhesion to matrix proteins in various tumor types...
March 19, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28302707/neuropeptide-y3-36-incorporated-into-pvax-nanoparticle-improves-functional-blood-flow-in-a-murine-model-of-hind-limb-ischemia
#19
Derek Eshun, Rabya Saraf, Soochan Bae, Jelliffe Jeganathan, Feroze Mahmood, Serkan Dilmen, Qingen Ke, Dongwon Lee, Peter M Kang, Robina Matyal
We generated a novel nanoparticle called PVAX, which has intrinsic anti-apoptotic and anti-inflammatory properties. This nanoparticle was loaded with Neuropeptide Y3-36, an angiogenic neuro-hormone that plays a central role in angiogenesis. Subsequently, we investigated whether PVAX-NPY3-36 could act as a therapeutic agent and induce angiogenesis and vascular remodeling in a murine model of hind limb ischemia. Adult C57BL/J6 mice (n=40) were assigned to treatment groups: Control, Ischemia PBS, Ischemia PVAX, Ischemia NPY3-36, and Ischemia PVAX-NPY3-36 Ischemia was induced by ligation of the femoral artery in all groups except Control and given relevant treatments (PBS, PVAX, NPY3-36, and PVAX-NPY3-36)...
March 16, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28300551/role-of-caveolin-1-vascular-endothelial-growth-factor-pathway-in-basic-fibroblast-growth-factor-induced-angiogenesis-and-neurogenesis-after-treadmill-training-following-focal-cerebral-ischemia-in-rats
#20
Qiongyi Pang, Huimei Zhang, Zhenzhen Chen, Yudan Wu, Min Yidian Bai Liu, Yun Zhao, Fengxia Tu, Chan Liu, Xiang Chen
Exercise is known to aid functional recovery following ischemia, though the mechanisms responsible for the beneficial effects of exercise on recovery from ischemic stroke are not fully understood. Basic fibroblast growth factor (bFGF) contributes to angiogenesis and promotes neurologic functional recovery after stroke. The present study aimed to investigate the possible mechanisms whereby treadmill exercise ameliorated impaired angiogenesis and neurogenesis following transient cerebral ischemia in middle cerebral artery occlusion (MCAO) rats...
March 11, 2017: Brain Research
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