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Angiogenesis

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https://www.readbyqxmd.com/read/28421290/pulsatile-high-dose-treatment-with-antiangiogenic-tyrosine-kinase-inhibitors-improves-clinical-antitumor-activity
#1
LETTER
Maria Rovithi, Henk M W Verheul
No abstract text is available yet for this article.
April 18, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28401381/antiangiogenic-therapy-combined-with-immune-checkpoint-blockade-in-renal-cancer
#2
REVIEW
Teele Kuusk, Laurence Albiges, Bernard Escudier, Nikolaos Grivas, John Haanen, Thomas Powles, Axel Bex
Antiangiogenic therapy with vascular endothelial growth factor (VEGF) inhibitors is the current first-line treatment in metastatic renal cell carcinoma (mRCC). Immunotherapy with checkpoint inhibitor has been recently added to the armamentarium of mRCC treatment. These therapies are based on treatment with antibodies that block programmed cell death-1 (PD-1), programmed cell death ligand 1 (PD-L1) pathways, demonstrating impressive response rates and improved survival in several tumour types. So far, nivolumab is the only approved anti-PD-1 monoclonal antibody after VEGF therapy in mRCC...
April 11, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28397127/a-novel-strategy-to-enhance-angiogenesis-in-vivo-using-the-small-vegf-binding-peptide-pr1p
#3
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/28391377/pro-angiogenic-capacities-of-microvesicles-produced-by-skin-wound-myofibroblasts
#4
Mays Merjaneh, Amélie Langlois, Sébastien Larochelle, Chanel Beaudoin Cloutier, Sylvie Ricard-Blum, Véronique J Moulin
Wound healing is a very highly organized process where numerous cell types are tightly regulated to restore injured tissue. Myofibroblasts are cells that produce new extracellular matrix and contract wound edges. We previously reported that the human myofibroblasts isolated from normal wound (WMyos) produced microvesicles (MVs) in the presence of the serum. In this study, MVs were further characterized using a proteomic strategy and potential functions of the MVs were determined. MV proteins isolated from six WMyo populations were separated using two-dimensional differential gel electrophoresis...
April 8, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28389777/contribution-of-tumor-endothelial-cells-to-drug-resistance-anti-angiogenic-tyrosine-kinase-inhibitors-act-as-p-glycoprotein-antagonists
#5
MariaRosa Bani, Alessandra Decio, Raffaella Giavazzi, Carmen Ghilardi
Tumor endothelial cells (TEC) differ from the normal counterpart, in both gene expression and functionality. TEC may acquire drug resistance, a characteristic that is maintained in vitro. There is evidence that TEC are more resistant to chemotherapeutic drugs, substrates of ATP-binding cassette (ABC) transporters. TEC express p-glycoprotein (encoded by ABCB1), while no difference in other ABC transporters was revealed compared to normal endothelia. A class of tyrosine kinase inhibitors (TKI), used as angiostatic compounds, interferes with the ATPase activity of p-glycoprotein, thus impairing its functionality...
April 7, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28382510/angiogenesis-inhibitors-in-combinatorial-approaches
#6
EDITORIAL
Patrycja Nowak-Sliwinska, Arjan W Griffioen
No abstract text is available yet for this article.
April 5, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28378227/epigenetic-approach-for-angiostatic-therapy-promising-combinations-for-cancer-treatment
#7
REVIEW
Robert H Berndsen, U Kulsoom Abdul, Andrea Weiss, Marloes Zoetemelk, Marije T Te Winkel, Paul J Dyson, Arjan W Griffioen, Patrycja Nowak-Sliwinska
Cancer cells are often dependent on epigenetic pathways for their survival. Consequently, drugs that target the epigenome, rather than the underlying DNA sequence, are currently attracting considerable attention. In recent years, the first epigenetic drugs have been approved for cancer chemotherapy, mainly for hematological applications. Limitations in single-drug efficacies have thus far limited their application in the treatment of solid tumors. Nevertheless, promising activity for these compounds has been suggested when combined with other, distinctly targeted agents...
April 4, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28374123/blood-flow-can-signal-during-angiogenesis-not-only-through-mechanotransduction-but-also-by-affecting-growth-factor-distribution
#8
Siavash Ghaffari, Richard L Leask, Elizabeth A V Jones
Growth factors, such as VEGF, promote the sprouting of new blood vessels. Growth factors are generally produced far from the endothelium, and the transport of these proteins is often assumed to occur through diffusion. When sprouting occurs in a perfused vascular bed, however, interstitial flow is present that can modify protein transport. We recently developed a technique to analyze flow dynamics and vascular remodeling simultaneously in avian embryos. In this study, we extend our technique to model interstitial flow through the porous matrix of the mesenchymal tissue and use this to investigate how flow in the blood vessels affects the distribution of growth factors in the mesenchyme, using VEGF as a prototypical angiogenic molecule...
April 3, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28364160/the-clinical-application-of-angiostatic-therapy-in-combination-with-radiotherapy-past-present-future
#9
REVIEW
Lisanne C Hamming, Ben J Slotman, Henk M W Verheul, Victor L Thijssen
Although monotherapy with angiostatic drugs is still far from effective, there is abundant evidence that angiostatic therapy can improve the efficacy of conventional treatments like radiotherapy. This has instigated numerous efforts to optimize and clinically implement the combination of angiostatic drugs with radiation treatment. The results from past and present clinical trials that explored this combination therapy indeed show encouraging results. However, current findings also show that the combination has variable efficacy and is associated with increased toxicity...
March 31, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28361267/anti-angiogenesis-for-cancer-revisited-is-there-a-role-for-combinations-with-immunotherapy
#10
REVIEW
Rakesh R Ramjiawan, Arjan W Griffioen, Dan G Duda
Angiogenesis is defined as the formation of new blood vessels from preexisting vessels and has been characterized as an essential process for tumor cell proliferation and viability. This has led to the development of pharmacological agents for anti-angiogenesis to disrupt the vascular supply and starve tumor of nutrients and oxygen, primarily through blockade of VEGF/VEGFR signaling. This effort has resulted in 11 anti-VEGF drugs approved for certain advanced cancers, alone or in combination with chemotherapy or other targeted therapies...
March 30, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28283856/effects-of-nintedanib-on-the-microvascular-architecture-in-a-lung-fibrosis-model
#11
Maximilian Ackermann, Yong Ook Kim, Willi L Wagner, Detlef Schuppan, Cristian D Valenzuela, Steven J Mentzer, Sebastian Kreuz, Detlef Stiller, Lutz Wollin, Moritz A Konerding
Nintedanib, a tyrosine kinase inhibitor approved for the treatment of idiopathic pulmonary fibrosis, has anti-fibrotic, anti-inflammatory, and anti-angiogenic activity. We explored the impact of nintedanib on microvascular architecture in a pulmonary fibrosis model. Lung fibrosis was induced in C57Bl/6 mice by intratracheal bleomycin (0.5 mg/kg). Nintedanib was started after the onset of lung pathology (50 mg/kg twice daily, orally). Micro-computed tomography was performed via volumetric assessment. Static lung compliance and forced vital capacity were determined by invasive measurements...
March 10, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28271280/rcan1-4-regulates-vegfr-2-internalisation-cell-polarity-and-migration-in-human-microvascular-endothelial-cells
#12
Ahmad F Alghanem, Emma L Wilkinson, Maxine S Emmett, Mohammad A Aljasir, Katherine Holmes, Beverley A Rothermel, Victoria A Simms, Victoria L Heath, Michael J Cross
Regulator of calcineurin 1 (RCAN1) is an endogenous inhibitor of the calcineurin pathway in cells. It is expressed as two isoforms in vertebrates: RCAN1.1 is constitutively expressed in most tissues, whereas transcription of RCAN1.4 is induced by several stimuli that activate the calcineurin-NFAT pathway. RCAN1.4 is highly upregulated in response to VEGF in human endothelial cells in contrast to RCAN1.1 and is essential for efficient endothelial cell migration and tubular morphogenesis. Here, we show that RCAN1...
March 7, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28197812/mcpip1-contributes-to-clear-cell-renal-cell-carcinomas-development
#13
Janusz Ligeza, Paulina Marona, Natalia Gach, Barbara Lipert, Katarzyna Miekus, Waclaw Wilk, Janusz Jaszczynski, Andrzej Stelmach, Agnieszka Loboda, Jozef Dulak, Wojciech Branicki, Janusz Rys, Jolanta Jura
Monocyte Chemoattractant protein-induced protein 1 (MCPIP1), also known as Regnase-1, is encoded by the ZC3H12a gene, and it mediates inflammatory processes by regulating the stability of transcripts coding for proinflammatory cytokines and controlling activity of transcription factors, such as NF-κB and AP1. We found that MCPIP1 transcript and protein levels are strongly downregulated in clear cell renal cell carcinoma (ccRCC) samples, which were derived from patients surgically treated for renal cancer compared to surrounded normal tissues...
February 14, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28194536/the-role-of-vasculature-in-bone-development-regeneration-and-proper-systemic-functioning
#14
REVIEW
Joanna Filipowska, Krzysztof A Tomaszewski, Łukasz Niedźwiedzki, Jerzy A Walocha, Tadeusz Niedźwiedzki
Bone is a richly vascularized connective tissue. As the main source of oxygen, nutrients, hormones, neurotransmitters and growth factors delivered to the bone cells, vasculature is indispensable for appropriate bone development, regeneration and remodeling. Bone vasculature also orchestrates the process of hematopoiesis. Blood supply to the skeletal system is provided by the networks of arteries and arterioles, having distinct molecular characteristics and localizations within the bone structures. Blood vessels of the bone develop through the process of angiogenesis, taking place through different, bone-specific mechanisms...
February 13, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28120216/a-somatic-gna11-mutation-is-associated-with-extremity-capillary-malformation-and-overgrowth
#15
Javier A Couto, Ugur M Ayturk, Dennis J Konczyk, Jeremy A Goss, August Y Huang, Steve Hann, Jennifer L Reeve, Marilyn G Liang, Joyce Bischoff, Matthew L Warman, Arin K Greene
BACKGROUND: Capillary malformation is a cutaneous vascular anomaly that is present at birth, darkens over time, and can cause overgrowth of tissues beneath the stain. The lesion is caused by a somatic activating mutation in GNAQ. In a previous study, we were unable to identify a GNAQ mutation in patients with a capillary malformation involving an overgrown lower extremity. We hypothesized that mutations in GNA11 or GNA14, genes closely related to GNAQ, also may cause capillary malformations...
January 24, 2017: Angiogenesis
https://www.readbyqxmd.com/read/27990590/angiopoietins-as-serum-biomarkers-for-lymphatic-anomalies
#16
Timothy D Le Cras, Paula S Mobberley-Schuman, Mary Broering, Lin Fei, Cameron C Trenor, Denise M Adams
Vascular anomalies can cause significant morbidity and mortality. Advances in diagnosis will be improved if noninvasive biomarkers can be identified, as obtaining a tissue biopsy can worsen the disease and precipitate complications. The goal of this study was to identify biomarkers for vascular anomaly patients to aid diagnosis and potentially give insights into pathogenesis. Blood was collected at baseline and then 6 and 12 months after treatment with the mTOR inhibitor sirolimus. Patients groups included generalized lymphatic anomaly (GLA), kaposiform lymphangiomatosis (KLA) and kaposiform hemangioendothelioma (KHE) with or without the Kasabach-Merritt phenomenon (KMP) coagulopathy...
February 2017: Angiogenesis
https://www.readbyqxmd.com/read/27943030/the-role-of-endoglin-in-post-ischemic-revascularization
#17
REVIEW
Elena Núñez-Gómez, Miguel Pericacho, Claudia Ollauri-Ibáñez, Carmelo Bernabéu, José M López-Novoa
Following arterial occlusion, blood vessels respond by forming a new network of functional capillaries (angiogenesis), by reorganizing preexisting capillaries through the recruitment of smooth muscle cells to generate new arteries (arteriogenesis) and by growing and remodeling preexisting collateral arterioles into physiologically relevant arteries (collateral development). All these processes result in the recovery of organ perfusion. The importance of endoglin in post-occlusion reperfusion is sustained by several observations: (1) endoglin expression is increased in vessels showing active angiogenesis/remodeling; (2) genetic endoglin haploinsufficiency in humans causes deficient angiogenesis; and (3) the reduction of endoglin expression by gene disruption or the administration of endoglin-neutralizing antibodies reduces angiogenesis and revascularization...
February 2017: Angiogenesis
https://www.readbyqxmd.com/read/27942994/a-new-algorithm-for-a-better-characterization-and-timing-of-the-anti-vegf-vascular-effect-named-normalization
#18
Karima El Alaoui-Lasmaili, El-Hadi Djermoune, Jean-Baptiste Tylcz, Dominique Meng, François Plénat, Noémie Thomas, Béatrice Faivre
Antiangiogenics are widely used in cancer treatment in combination with chemotherapy and radiotherapy for their vascular effects. Antiangiogenics are supposed to induce morphological and functional changes in the chaotic tumor vasculature that would help enhance the therapeutic efficacy of chemotherapy and radiotherapy through the amelioration of the drug delivery or the oxygenation in the tumor, respectively. However, finding the best treatment sequence is not an easy task to achieve and no consensus has yet been established because of the lack of knowledge regarding when and for how long the vascular network is ameliorated...
February 2017: Angiogenesis
https://www.readbyqxmd.com/read/27807692/tissue-factor-is-an-angiogenic-specific-receptor-for-factor-vii-targeted-immunotherapy-and-photodynamic-therapy
#19
Zhiwei Hu, Jijun Cheng, Jie Xu, Wolfram Ruf, Charles J Lockwood
Identification of target molecules specific for angiogenic vascular endothelial cells (VEC), the inner layer of pathological neovasculature, is critical for discovery and development of neovascular-targeting therapy for angiogenesis-dependent human diseases, notably cancer, macular degeneration and endometriosis, in which vascular endothelial growth factor (VEGF) plays a central pathophysiological role. Using VEGF-stimulated vascular endothelial cells (VECs) isolated from microvessels, venous and arterial blood vessels as in vitro angiogenic models and unstimulated VECs as a quiescent VEC model, we examined the expression of tissue factor (TF), a membrane-bound receptor on the angiogenic VEC models compared with quiescent VEC controls...
February 2017: Angiogenesis
https://www.readbyqxmd.com/read/27787629/lymphangiogenesis-in-rat-asthma-model
#20
Aigul Moldobaeva, John Jenkins, Qiong Zhong, Elizabeth M Wagner
Although bronchial angiogenesis has been well documented in allergic asthma, lymphangiogenesis has not been widely studied. Therefore, we evaluated changes in lung lymphatics in a rat model of allergen-induced asthma using house dust mite (Der p 1; 100 μg/challenge). Additionally, properties of isolated lung lymphatic endothelial cells (CD45(-), CD141(+), LYVE-1(+), Prox-1(+)) were studied in vitro. Three weeks after the onset of intranasal allergen exposure (twice-weekly), an increase in the number of lung lymphatic vessels was measured (34% increase) by lung morphometry...
February 2017: Angiogenesis
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