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Angiogenesis

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https://www.readbyqxmd.com/read/29185141/tip-cell-behavior-is-regulated-by-transcription-factor-foxo1-under-hypoxic-conditions-in-developing-mouse-retinas
#1
Moe Fukumoto, Kanako Kondo, Kazumasa Uni, Tomoko Ishiguro, Mikiko Hayashi, Shinnosuke Ueda, Itsuki Mori, Kenta Niimi, Fumi Tashiro, Satsuki Miyazaki, Jun-Ichi Miyazaki, Shinobu Inagaki, Tatsuo Furuyama
Forkhead box protein O1 (FoxO1) is a transcription factor and a critical regulator of angiogenesis. Various environmental stimuli, including growth factors, nutrients, shear stress, oxidative stress and hypoxia, affect FoxO1 subcellular localization and strongly influence its transcriptional activity; however, FoxO1-localization patterns in endothelial cells (ECs) during development have not been clarified in vivo. Here, we reported that FoxO1 expression was observed in three layers of angiogenic vessels in developing mouse retinas and that among these layers, the front layer showed high levels of FoxO1 expression in the nuclei of most tip ECs...
November 28, 2017: Angiogenesis
https://www.readbyqxmd.com/read/29159709/12th-international-hht-scientific-conference-june-8-11-2017-dubrovnik-croatia
#2
(no author information available yet)
No abstract text is available yet for this article.
November 20, 2017: Angiogenesis
https://www.readbyqxmd.com/read/29150732/dimethylarginine-dimethylaminohydrolase-1-ddah1-is-frequently-upregulated-in-prostate-cancer-and-its-overexpression-conveys-tumor-growth-and-angiogenesis-by-metabolizing-asymmetric-dimethylarginine-adma
#3
Karthik Reddy Kami Reddy, Chandrashekhar Dasari, Divya Duscharla, Bhukya Supriya, N Sai Ram, M V Surekha, Jerald Mahesh Kumar, Ramesh Ummanni
Tissue microarray analysis confirmed higher dimethylarginine dimethylaminohydrolase-1 (DDAH1) expression in prostate cancer (PCa) compared to benign and normal prostate tissues. DDAH1 regulates nitric oxide (NO) production by degrading endogenous nitric oxide synthase (NOS) inhibitor, asymmetric dimethylarginine (ADMA). This study examined whether DDAH1 has any physiological role in PCa progression. Using overexpression of DDAH1 in PCa (PC3 and LNCaP) cell lines, we found that DDAH1 promotes cell proliferation, migration and invasion by lowering ADMA levels, as well as increasing NO production...
November 17, 2017: Angiogenesis
https://www.readbyqxmd.com/read/29147813/noninvasive-induction-of-angiogenesis-in-tissues-by-external-suction-sequential-optimization-for-use-in-reconstructive-surgery
#4
G Giatsidis, L Cheng, A Haddad, K Ji, J Succar, L Lancerotto, J Lujan-Hernandez, P Fiorina, H Matsumine, D P Orgill
In reconstructive surgery, tissues are routinely transferred to repair a defect caused by trauma, cancer, chronic diseases, or congenital malformations; surgical transfer intrinsically impairs metabolic supply to tissues placing a risk of ischemia-related complications such as necrosis, impaired healing, or infection. Pre-surgical induction of angiogenesis in tissues (preconditioning) can limit postsurgical ischemic complications and improve outcomes, but very few preconditioning strategies have successfully been translated to clinical practice due to the invasiveness of most proposed approaches, their suboptimal effects, and their challenging regulatory approval...
November 17, 2017: Angiogenesis
https://www.readbyqxmd.com/read/29147802/executive-summary-of-the-12th-hht-international-scientific-conference
#5
Jillian W Andrejecsk, Anna E Hosman, Luisa M Botella, Claire L Shovlin, Helen M Arthur, Sophie Dupuis-Girod, Elisabetta Buscarini, Christopher C W Hughes, Franck Lebrin, Christine L Mummery, Marco C Post, Johannes J Mager
Hereditary hemorrhagic telangiectasia is an autosomal dominant trait affecting approximately 1 in 5000 people. A pathogenic DNA sequence variant in the ENG, ACVRL1 or SMAD4 genes, can be found in the majority of patients. The 12th International Scientific HHT Conference was held on June 8-11, 2017 in Dubrovnik, Croatia to present and discuss the latest scientific achievements, and was attended by over 200 scientific and clinical researchers. In total 174 abstracts were accepted of which 58 were selected for oral presentations...
November 16, 2017: Angiogenesis
https://www.readbyqxmd.com/read/29110215/mechanisms-of-angiogenesis-in-microbe-regulated-inflammatory-and-neoplastic-conditions
#6
REVIEW
Sanaullah Sajib, Fatema Tuz Zahra, Michail S Lionakis, Nadezhda A German, Constantinos M Mikelis
Commensal microbiota inhabit all the mucosal surfaces of the human body. It plays significant roles during homeostatic conditions, and perturbations in numbers and/or products are associated with several pathological disorders. Angiogenesis, the process of new vessel formation, promotes embryonic development and critically modulates several biological processes during adulthood. Indeed, deregulated angiogenesis can induce or augment several pathological conditions. Accumulating evidence has implicated the angiogenic process in various microbiota-associated human diseases...
November 6, 2017: Angiogenesis
https://www.readbyqxmd.com/read/29030736/n-tert-butyloxycarbonyl-phe-leu-phe-leu-phe-boc2-inhibits-the-angiogenic-activity-of-heparin-binding-growth-factors
#7
Imtiaz M Nawaz, Paola Chiodelli, Sara Rezzola, Giuseppe Paganini, Michela Corsini, Alessio Lodola, Alessio Di Ianni, Marco Mor, Marco Presta
The peptides N-tert-butyloxycarbonyl-Phe-Leu-Phe-Leu-Phe (BOC2) and BOC-Met-Leu-Phe (BOC1) are widely used antagonists of formyl peptide receptors (FPRs), BOC2 acting as an FPR1/FPR2 antagonist whereas BOC1 inhibits FPR1 only. Extensive investigations have been performed by using these FPR antagonists as a tool to assess the role of FPRs in physiological and pathological conditions. Based on previous observations from our laboratory, we assessed the possibility that BOC2 may exert also a direct inhibitory effect on the angiogenic activity of vascular endothelial growth factor-A (VEGF-A)...
October 13, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28993956/notch-signaling-controls-sprouting-angiogenesis-of-endometriotic-lesions
#8
Christina Körbel, Miriam D Gerstner, Michael D Menger, Matthias W Laschke
Angiogenesis is essential for the engraftment and growth of endometriotic lesions. In this study, we analyzed whether this process is regulated by Notch signaling. Endometriotic lesions were induced by endometrial tissue transplantation into dorsal skinfold chambers of C57BL/6 mice, which were treated with the γ-secretase inhibitor DAPT or vehicle. Vascularization, morphology, and proliferation of the newly developing lesions were analyzed using intravital fluorescence microscopy, histology, and immunohistochemistry over 14 days...
October 9, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28993906/antiangiogenesis-and-medical-therapy-failure-in-intracranial-atherosclerosis
#9
Nestor R Gonzalez, Raymond Liou, Florian Kurth, Hao Jiang, Jeffrey Saver
Intracranial atherosclerotic disease (ICAD) is one of the most common causes of stroke worldwide and the one with the worst prognosis. In this study, we assessed the hypothesis that the balance of circulating pro- and antiangiogenic factors plays a role in the evolution of the disease and can be used as a potential marker for the disease course and a target for treatment. Seventy-four patients with severe ICAD were enrolled in this prospective observational study, medically optimized, and followed for 6 months...
October 9, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28988272/pre-culture-in-endothelial-growth-medium-enhances-the-angiogenic-properties-of-adipose-derived-stem-stromal-cells
#10
Lucas E B Souza, Liziane R Beckenkamp, Lays M Sobral, Daianne M C Fantacini, Fernanda U F Melo, Josiane S Borges, Andréia M Leopoldino, Simone Kashima, Dimas Tadeu Covas
Considerable progress has been made on the development of adipose-derived stem/stromal cells (ASCs) as pro-angiogenic therapeutic tools. However, variable clinical results highlight the need for devising strategies to enhance their therapeutic efficacy. Since ASCs proliferate and stabilize newly formed vessels during the angiogenic phase of adipose tissue formation, we hypothesized that mimicking an angiogenic milieu during culture of ASCs would enhance their capacity to support endothelial cell survival and angiogenesis...
October 7, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28956197/bone-marrow-sinusoidal-endothelium-damage-and-potential-regeneration-following-cancer-radiotherapy-or-chemotherapy
#11
REVIEW
Mohammadhossein Hassanshahi, Alireza Hassanshahi, Samira Khabbazi, Yu-Wen Su, Cory J Xian
It is very well known that bone marrow (BM) microvasculature may possess a crucial role in the maintenance of homeostasis of BM due to mutual interactions between BM microvascular system and other physiological functions including haematopoiesis and osteogenesis. Chemotherapy and radiotherapy are known as main approaches for cancer treatment and also are known as the main cause of damage to the BM microvascular system. However, despite the importance of BM microvasculature in orchestrating various biological functions, less attention has been drawn to address the underlying mechanisms for the damage and to explore cellular and molecular mechanisms by which the recovery/regeneration of chemotherapy- and/or radiotherapy-induced BM microvascular system damage can occur...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28951988/a-genomic-screen-for-angiosuppressor-genes-in-the-tumor-endothelium-identifies-a-multifaceted-angiostatic-role-for-bromodomain-containing-7-brd7
#12
Judy R van Beijnum, Patrycja Nowak-Sliwinska, Maaike van Berkel, Tse J Wong, Arjan W Griffioen
Tumor angiogenesis is characterized by deregulated gene expression in endothelial cells (EC). While studies until now have mainly focused on overexpressed genes in tumor endothelium, we here describe the identification of transcripts that are repressed in tumor endothelium and thus have potential suppressive effects on angiogenesis. We identified nineteen putative angiosuppressor genes, one of them being bromodomain containing 7 (BRD7), a gene that has been assigned tumor suppressor properties. BRD7 was studied in more detail, and we demonstrate that BRD7 expression is inversely related to EC activation...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28905243/3d-endothelial-cell-spheroid-human-vitreous-humor-assay-for-the-characterization-of-anti-angiogenic-inhibitors-for-the-treatment-of-proliferative-diabetic-retinopathy
#13
Sara Rezzola, Imtiaz M Nawaz, Anna Cancarini, Cosetta Ravelli, Stefano Calza, Francesco Semeraro, Marco Presta
Proliferative diabetic retinopathy (PDR) represents a main cause of acquired blindness. Despite the recognition of the key role exerted by vascular endothelial growth factor (VEGF) in the pathogenesis of PDR, limitations to anti-VEGF therapies do exist. Thus, rapid and cost-effective angiogenesis assays are crucial for the screening of anti-angiogenic drug candidates for PDR therapy. In this context, evaluation of the angiogenic potential of PDR vitreous fluid may represent a valuable tool for preclinical assessment of angiostatic molecules...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28875379/tumor-vessel-disintegration-by-maximum-tolerable-pfkfb3-blockade
#14
Lena-Christin Conradi, Aleksandra Brajic, Anna Rita Cantelmo, Ann Bouché, Joanna Kalucka, Andreas Pircher, Ulrike Brüning, Laure-Anne Teuwen, Stefan Vinckier, Bart Ghesquière, Mieke Dewerchin, Peter Carmeliet
Blockade of the glycolytic activator PFKFB3 in cancer cells (using a maximum tolerable dose of 70 mg/kg of the PFKFB3 blocker 3PO) inhibits tumor growth in preclinical models and is currently being tested as a novel anticancer treatment in phase I clinical trials. However, a detailed preclinical analysis of the effects of such maximum tolerable dose of a PFKFB3 blocker on the tumor vasculature is lacking, even though tumor endothelial cells are hyper-glycolytic. We report here that a high dose of 3PO (70 mg/kg), which inhibits cancer cell proliferation and reduces primary tumor growth, causes tumor vessel disintegration, suppresses endothelial cell growth for protracted periods, (model-dependently) aggravates tumor hypoxia, and compromises vascular barrier integrity, thereby rendering tumor vessels more leaky and facilitating cancer cell intravasation and dissemination...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28840415/endothelial-progenitor-cells-in-multiple-myeloma-neovascularization-a-brick-to-the-wall
#15
REVIEW
Maria Margarida Tenreiro, Maria Leonor Correia, Maria Alexandra Brito
Multiple myeloma (MM) is characterized by the clonal expansion of plasma cells in the bone marrow that leads to events such as bone destruction, anaemia and renal failure. Despite the several therapeutic options available, there is still no effective cure, and the standard survival is up to 4 years. The evolution from the asymptomatic stage of monoclonal gammopathy of undetermined significance to MM and the progression of the disease itself are related to cellular and molecular alterations in the bone marrow microenvironment, including the development of the vasculature...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28840375/frizzled-5-a-high-affinity-receptor-for-secreted-frizzled-related-protein-2-activation-of-nuclear-factor-of-activated-t-cells-c3-signaling-to-promote-angiogenesis
#16
Yuri K Peterson, Patrick Nasarre, Ingrid V Bonilla, Eleanor Hilliard, Jennifer Samples, Thomas A Morinelli, Elizabeth G Hill, Nancy Klauber-DeMore
Secreted frizzled-related protein 2 (SFRP2) is a pro-angiogenic factor expressed in the vasculature of a wide variety of human tumors, and modulates angiogenesis via the calcineurin-dependent nuclear factor of activated T-cells cytoplasmic 3 (NFATc3) pathway in endothelial cells. However, until now, SFRP2 receptor for this pathway was unknown. In the present study, we first used amino acid alignments and molecular modeling to demonstrate that SFRP2 interaction with frizzled-5 (FZD5) is typical of Wnt/FZD family members...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28795242/prox1-gfp-flt1-dsred-transgenic-mice-an-animal-model-for-simultaneous-live-imaging-of-angiogenesis-and-lymphangiogenesis
#17
Wei Zhong, Xinbo Gao, Shuangyong Wang, Kyuyeon Han, Masatsugu Ema, Susanne Adams, Ralf H Adams, Mark I Rosenblatt, Jin-Hong Chang, Dimitri T Azar
The roles of angiogenesis in development, health, and disease have been studied extensively; however, the studies related to lymphatic system are limited due to the difficulty in observing colorless lymphatic vessels. But recently, with the improved technique, the relative importance of the lymphatic system is just being revealed. We bred transgenic mice in which lymphatic endothelial cells express GFP (Prox1-GFP) with mice in which vascular endothelial cells express DsRed (Flt1-DsRed) to generate Prox1-GFP/Flt1-DsRed (PGFD) mice...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28752390/pdgfr%C3%AE-p2a-creer-t2-mice-a-genetic-tool-to-target-pericytes-in-angiogenesis
#18
Henar Cuervo, Brianna Pereira, Taliha Nadeem, Mika Lin, Frances Lee, Jan Kitajewski, Chyuan-Sheng Lin
Pericytes are essential mural cells distinguished by their association with small caliber blood vessels and the presence of a basement membrane shared with endothelial cells. Pericyte interaction with the endothelium plays an important role in angiogenesis; however, very few tools are currently available that allow for the targeting of pericytes in mouse models, limiting our ability to understand their biology. We have generated a novel mouse line expressing tamoxifen-inducible Cre-recombinase under the control of the platelet-derived growth factor receptor β promoter: PDGFRβ-P2A-CreER (T2) ...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28741167/microvascular-ultrastructural-changes-precede-cognitive-impairment-in-the-murine-appswe-ps1de9-model-of-alzheimer-s-disease
#19
Patricia Kelly, Paul Denver, Simon C Satchell, Maximilian Ackermann, Moritz A Konerding, Christopher A Mitchell
Cerebral and systemic organ microvascular pathologies coexist with human Alzheimer's disease (AD) neuropathology. In this study, we hypothesised that both cerebral and systemic microvascular pathologies exist in 4- to 5-month-old male APPswe/PS1dE9 (APP/PS1) transgenic mice prior to the onset of cognitive impairment. To assess this we examined recognition memory in both wild-type and APP/PS1 mice using the object recognition task (ORT; n = 11 per group) and counted thioflavin-S-positive plaques in brain (n = 6 per group)...
November 2017: Angiogenesis
https://www.readbyqxmd.com/read/28741166/a-new-key-player-in-vegf-dependent-angiogenesis-in-human-hepatocellular-carcinoma-dimethylarginine-dimethylaminohydrolase-1
#20
Nikki Buijs, J Efraim Oosterink, Morgan Jessup, Henk Schierbeek, Donna B Stolz, Alexander P Houdijk, David A Geller, Paul A van Leeuwen
BACKGROUND: Anti-angiogenic therapies, targeting VEGF, are a promising treatment for hepatocellular carcinoma (HCC). To enhance this potential therapy, identification of novel targets in this pathway is of major interest. Nitric oxide (NO) plays a crucial role in VEGF-dependent angiogenesis. NO production depends on arginine as substrate and asymmetric dimethylarginine (ADMA) as inhibitor. Dimethylarginine dimethylaminohydrolase 1 (DDAH-1) catabolizes ADMA and therefore regulates NO and VEGF expression...
November 2017: Angiogenesis
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