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Mona Mohamed El-Naa, Mohamed Othman, Sheren Younes
Sildenafil is the first phosphodiesterase-5 inhibitor used for the treatment of erectile dysfunction. However, recent studies have been suggesting an antitumor effect of sildenafil. The current study assessed the aforementioned activity of sildenafil in vivo and in vitro in solid-tumor-bearing mice and in a human cell line MCF-7, respectively. Moreover, we investigated the impact of sildenafil on cisplatin antitumor activity. The solid tumor was induced by inoculation of Ehrlich ascites carcinoma cells in female mice...
2016: Drug Design, Development and Therapy
Theodoros Eleftheriadis, Georgios Pissas, Maria Sounidaki, Nikolaos Antoniadis, Georgia Antoniadi, Vassilios Liakopoulos, Ioannis Stefanidis
Under growth conditions, angiogenin is translocated into the nucleus, where it enhances ribosomal RNA transcription, facilitating increased protein synthesis and cellular proliferation. During stress conditions, angiogenin is sequestered in the cytoplasm, where it cleaves transfer RNA (tRNA) to produce tRNA-derived, stress-induced small RNAs (tiRNAs) that inhibit global protein synthesis, but increase the translation of anti-apoptotic factors. In the present study, the role of angiogenin in the human alloreactive immune response was evaluated using mixed lymphocyte reactions (MLRs) and neamine, an inhibitor of angiogenin nuclear translocation...
November 2016: Experimental and Therapeutic Medicine
Yoshihiko Usui, Kinya Tsubota, Tsuyoshi Agawa, Shunichiro Ueda, Kazuhiko Umazume, Yoko Okunuki, Takeshi Kezuka, Naoyuki Yamakawa, Hiroshi Goto
BACKGROUND: To examine the usefulness of measuring immune mediators in aqueous humor samples for differentiating malignant uveal melanoma from benign pigmented intraocular tumors. METHODS: Thirteen eyes of 13 patients with uveal melanoma were studied, and 13 eyes of 13 patients with benign pigmented intraocular tumors served as controls. Undiluted samples of aqueous humor were collected, and a cytometric bead array was used to determine the aqueous humor concentrations of 35 immune mediators comprising 14 interleukins (IL), interferon-γ, interferon-γ-inducible protein-10, monocyte chemoattractant protein (MCP)-1, macrophage inflammatory protein (MIP)-1α, MIP-1β, regulated on activation normal T cell expressed and secreted, monokine induced by interferon-γ, basic fibroblast growth factor, Fas ligand, granzyme A, granzyme B, eotaxin, interferon-inducible T-cell alpha chemoattractant, fractalkine, granulocyte macrophage colony-stimulating factor, granulocyte colony-stimulating factor, vascular endothelial growth factor, angiogenin, tumor necrosis factor-α, lymphotoxin-α, and CD40L...
November 22, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
Peng Yu, Ming Liu, Xue Yang, Ying Yu, Ji Zhao, Lei Zhang, Rui Tong, Hong Jiang, Yunzeng Zou, Junbo Ge
Angiogenin (ANG) has been shown to be elevated in several cardiovascular diseases. To detect its levels and diagnostic capacity in coronary heart disease (CHD) patients complicating chronic heart failure (CHF), we performed this cross-sectional study and enrolled 616 CHD patients and 53 healthy controls. According to complicating CHF or not, the patients were divided into CHF group (n = 203) and CHD disease controls (n = 413), in which the CHF group was subdivided as heart failure with reduced ejection fraction (HFrEF) group or heart failure with preserved ejection fraction (HFpEF) group on the basis of left ventricular ejection fraction (LVEF), or as different NYHA class group...
2016: Disease Markers
J L Dentis, N B Schreiber, A M Burress, L J Spicer
Angiogenin is a member of the ribonuclease A superfamily of proteins that has been implicated in stimulating angiogenesis but whether angiogenin can directly affect ovarian granulosa or theca cell function is unknown. Therefore, the objective of these studies was to determine the effect of angiogenin on proliferation and steroidogenesis of bovine granulosa and theca cells. In experiments 1 and 2, granulosa cells from small (1 to 5 mm diameter) follicles and theca cells from large (8 to 22 mm diameter) follicles were cultured to evaluate the dose-response effect of recombinant human angiogenin on steroidogenesis...
October 20, 2016: Animal: An International Journal of Animal Bioscience
Yuko Ishida, Takehiko Yasueda, Hiroki Murakami, Ken Kato
Bovine angiogenin is a major component of the bone resorption inhibitory activity of milk basic protein (MBP). The intestinal absorption of bovine angiogenin was investigated in a rat model, where it was detected in an intact form in the peripheral blood after the oral administration of MBP. This finding demonstrates that orally administered bovine angiogenin is absorbed without being degraded.
October 19, 2016: Bioscience, Biotechnology, and Biochemistry
Natàlia Vilà, Jacqueline Coblentz, Carlos Moreira-Neto, Vasco Bravo-Filho, Pablo Zoroquiain, Miguel N Burnier
PURPOSE: To determine whether pretreatment of retinal pigmented epithelial (RPE) cells with lutein can affect the response of cells to bevacizumab therapy. METHODS: One human RPE cell line (ARPE-19) was used for all experiments. The cells were treated with lutein in different concentrations (0.01, 0.1, 1, 10, or 100 μg/ml). After 24 h, all plates were treated with bevacizumab (0.25 mg/ml). Media were harvested 24 h later for sandwich ELISA-based angiogenesis arrays...
October 15, 2016: Ophthalmic Research
Zuzanna Drebert, Mark MacAskill, Dahlia Doughty-Shenton, Karolien De Bosscher, Marc Bracke, Patrick W F Hadoke, Ilse M Beck
Angiogenesis is important in cancer progression and can be influenced by tumor-associated myofibroblasts. We addressed the hypothesis that glucocorticoids indirectly affect angiogenesis by altering the release of pro-angiogenic factors from colon cancer-derived myofibroblasts. Our study shows that glucocorticoids reduced prostanoids, urokinase-type plasminogen activator (uPA) and angiopoietin-like protein-2 (ANGPTL2) levels, but increased angiogenin (ANG) in supernatant from human CT5.3hTERT colon cancer-derived myofibroblasts...
October 4, 2016: Vascular Pharmacology
Li Xu, Yan Yan, Xiang Xue, Chun-Guang Li, Zhi-Yun Xu, He-Zhong Chen
Squamous cell carcinoma of the lung is one of the most aggressive cancers, and its aggressiveness is in part due to its intrinsic high rate of metastasis. Moreover, the process of epithelial-mesenchymal transition (EMT) appears to be involved in these neoplastic processes. Furthermore, EMT-type cells share many biological characteristics with the function of angiogenin (ANG) in squamous cell lung carcinoma. We conducted immunohistochemical analysis to detect the expression of ANG, E-cadherin, vimentin, N-cadherin, β-catenin and TGF-β1 in 60 cases of squamous cell lung carcinoma tissues...
September 19, 2016: Oncology Reports
L I Shu-Ping, H U Guo-Fu
Angiogenin (ANG), a secreted ribonuclease, has been characterized recently as an anti-apoptosis factor involved in a variety of cellular anti-apoptosis process. ANG regulates intrinsic pathways-related major molecules such as anti-apoptotic protein Bcl-2, as well as extrinsic signaling pathways. Moreover, ANG regulates p53-regulated apoptosis, a process considered to be important in regulating both the extrinsic and the intrinsic pathways.
December 2015: Zhongguo Sheng Wu Hua Xue Yu Fen Zi Sheng Wu Xue Bao, Chinese Journal of Biochemistry and Molecular Biology
Aikaterini C Tsika, Demetra S M Chatzileontiadou, Demetres D Leonidas, Georgios A Spyroulias
Here, we report the high yield expression and preliminary structural analysis via solution hetero-nuclear NMR spectroscopy of the recombinant Met-1 human Angiogenin. The analysis reveals a well folded as well as, a monomeric polypeptide. Τhe sequence-specific assignment of its (1)H, (15)N and (13)C resonances at high percentage was obtained. Also, using TALOS+ its secondary structure elements were determined.
October 2016: Biomolecular NMR Assignments
Marianna Di Scala, Andrés Hidalgo
Successful hematopoietic regeneration demands preservation of stemness while enabling expansion and differentiation into blood lineages. Now, Silberstein et al. (2016) and Goncalves et al. (2016) identify a ribonuclease secreted by proximal niche cells that simultaneously drives quiescence of HSCs and proliferation of myeloid progenitors and dramatically enhances hematopoietic recovery after HSC transplantation.
September 1, 2016: Cell Stem Cell
Katarzyna Grzela, Malgorzata Litwiniuk, Alicja Krejner, Wioletta Zagorska, Tomasz Grzela
Asthma progression is associated with airway remodeling and neo-vascularization. However, role of angiogenesis in these changes remains unclear and available data still incomplete. In this pilot study we verify usefulness of proteome profiler assay in screening of angiogenesis-related factors in exhaled breath condensates (EBC) collected from children with asthma. EBC samples from patients with mild or severe asthma and healthy controls were tested using protein array. In EBC samples from patients with severe asthma we have found large quantities of several angiogenesis regulators, including thrombospondin (TSP)-1, angiogenin, dipeptidyl peptidase (DPP) IV, matrix metalloproteinase (MMP)-9 and its inhibitor TIMP-1...
September 2016: Respiratory Medicine
Lev Silberstein, Kevin A Goncalves, Peter V Kharchenko, Raphael Turcotte, Youmna Kfoury, Francois Mercier, Ninib Baryawno, Nicolas Severe, Jacqueline Bachand, Joel A Spencer, Ani Papazian, Dongjun Lee, Brahmananda Reddy Chitteti, Edward F Srour, Jonathan Hoggatt, Tiffany Tate, Cristina Lo Celso, Noriaki Ono, Stephen Nutt, Jyrki Heino, Kalle Sipilä, Toshihiro Shioda, Masatake Osawa, Charles P Lin, Guo-Fu Hu, David T Scadden
Physiological stem cell function is regulated by secreted factors produced by niche cells. In this study, we describe an unbiased approach based on the differential single-cell gene expression analysis of mesenchymal osteolineage cells close to, and further removed from, hematopoietic stem/progenitor cells (HSPCs) to identify candidate niche factors. Mesenchymal cells displayed distinct molecular profiles based on their relative location. We functionally examined, among the genes that were preferentially expressed in proximal cells, three secreted or cell-surface molecules not previously connected to HSPC biology-the secreted RNase angiogenin, the cytokine IL18, and the adhesion molecule Embigin-and discovered that all of these factors are HSPC quiescence regulators...
October 6, 2016: Cell Stem Cell
Meng Wang, Hao Liu, Jing Zheng, Bobei Chen, Mi Zhou, Wenlu Fan, Hen Wang, Xiaoyang Liang, Xiaolong Zhou, Gilbert Eriani, Pingping Jiang, Min-Xin Guan
Several mitochondrial tRNA mutations have been associated with maternally inherited diabetes and deafness. However, the pathophysiology of these tRNA mutations remains poorly understood. In this report, we identified the novel homoplasmic 14692A→G mutation in the mitochondrial tRNA(Glu) gene among three Han Chinese families with maternally inherited diabetes and deafness. The m.14692A→G mutation affected a highly conserved uridine at position 55 of the TΨC loop of tRNA(Glu) The uridine is modified to pseudouridine (Ψ55), which plays an important role in the structure and function of this tRNA...
September 30, 2016: Journal of Biological Chemistry
Kevin A Goncalves, Lev Silberstein, Shuping Li, Nicolas Severe, Miaofen G Hu, Hailing Yang, David T Scadden, Guo-Fu Hu
Regulation of stem and progenitor cell populations is critical in the development, maintenance, and regeneration of tissues. Here, we define a novel mechanism by which a niche-secreted RNase, angiogenin (ANG), distinctively alters the functional characteristics of primitive hematopoietic stem/progenitor cells (HSPCs) compared with lineage-committed myeloid-restricted progenitor (MyePro) cells. Specifically, ANG reduces the proliferative capacity of HSPC while simultaneously increasing proliferation of MyePro cells...
August 11, 2016: Cell
Abhay Kumar Singh, Mainak Dutta, Ratna Chattopadhyay, Baidyanath Chakravarty, Koel Chaudhury
PURPOSE: The study aimed to investigate key intrafollicular prognostic factors among various cytokines and angiogenic molecules for prediction of mature oocytes and good-quality embryos in women with endometriosis undergoing in vitro fertilization (IVF). METHODS: Paired follicular fluid and serum samples were collected from 200 women with advanced stage endometriosis and 140 normal ovulating women during oocyte retrieval. The concentrations of cytokines (pro-inflammatory: IL-1β, TNF-α, IL-2, IL-8, IL-12, IFN-γ; anti-inflammatory: IL-4, IL-6, IL-10) and angiogenic molecules (vascular endothelial growth factor (VEGF), adrenomedullin, angiogenin) were determined in follicular fluid and serum using ELISA...
October 2016: Journal of Assisted Reproduction and Genetics
Antonio Magrì, Alessia Munzone, Massimiliano Peana, Serenella Medici, Maria Antonietta Zoroddu, Orjan Hansson, Cristina Satriano, Enrico Rizzarelli, Diego La Mendola
Angiogenin (Ang) is a potent angiogenic factor, strongly overexpressed in patients affected by different types of cancers. The specific Ang cellular receptors have not been identified, but it is known that Ang-actin interaction induces changes both in the cell cytoskeleton and in the extracellular matrix. Most in vitro studies use the recombinant form (r-Ang) instead of the form that is normally present in vivo ("wild-type", wt-Ang). The first residue of r-Ang is a methionine, with a free amino group, whereas wt-Ang has a glutamic acid, whose amino group spontaneously cyclizes in the pyro-glutamate form...
2016: International Journal of Molecular Sciences
Quentin Tavernier, Iadh Mami, Marion Rabant, Alexandre Karras, Pierre Laurent-Puig, Eric Chevet, Eric Thervet, Dany Anglicheau, Nicolas Pallet
The ribonuclease angiogenin is a component of the mammalian stress response that is secreted by renal epithelial cells on activation of the inositol-requiring enzyme 1α (IRE1α)-active spliced X-box binding protein 1 (sXBP1) axis and instrumental to the adaptation to AKI associated with endoplasmic reticulum stress. To determine whether the amount of angiogenin in urine of individuals with a kidney injury reflects the magnitude of the lesions and provides information on the risk of organ failure, we examined individuals referred for a kidney injury and determined the biochemical characteristics of urinary angiogenin and its diagnostic and prognostic values...
July 19, 2016: Journal of the American Society of Nephrology: JASN
Anna Małkiewicz, Maria Skrzypkowska, Bartosz Słomiński, Janusz Siebert, Piotr Gutknecht, Jolanta Myśliwska
Our purpose was to determine whether the VEGF -152 G/A polymorphism could be associated with chronic kidney disease and endothelial dysfunction in hypertensive patients. There were 100 healthy volunteers enrolled into the control group. The group of patients was constituted by 99 consecutively admitted hypertensive patients referred to our Institution by their general practitioner. All patients were treated with anti-hypertensive polytherapy. Presented study revealed that the hypertensive patients bearing the GG genotype were characterized by the highest values of diastolic blood pressure and markers of endothelial damage such as Angiogenin, Endostatin, CRP as well as von Willebrandt factor...
September 2016: Molecular Biology Reports
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