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Angiopoietins

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https://www.readbyqxmd.com/read/28090293/relevance-of-angiopoietin-2-and-soluble-p-selectin-levels-in-patients-with-pulmonary-arterial-hypertension-receiving-combination-therapy-with-oral-treprostinil-a-freedom-c2-biomarker-substudy
#1
Manuel J Richter, Ralph Schermuly, Werner Seeger, Youlan Rao, Hossein A Ghofrani, Henning Gall
: Studies have suggested roles for angiopoietin-2 (Ang-2) and soluble P-selectin (sP-selectin) as biomarkers of disease severity and treatment response in pulmonary arterial hypertension (PAH), but additional data are required for validation. We evaluated these biomarkers using data from FREEDOM-C2, in which patients with PAH receiving stable monotherapy or combination therapy were randomized to receive additional treatment with oral treprostinil (up-titrated from 0.25 mg twice daily) or placebo for 16 weeks...
December 2016: Pulmonary Circulation
https://www.readbyqxmd.com/read/28086749/evolution-of-the-angiopoietin-like-gene-family-in-teleosts-and-their-role-in-skin-regeneration
#2
Rita A Costa, João C R Cardoso, Deborah M Power
BACKGROUND: The skin in vertebrates is a protective barrier and damage is rapidly repaired to re-establish barrier function and maintain internal homeostasis. The angiopoietin-like (ANGPTL) proteins are a family of eight secreted glycoproteins with an important role in skin repair and angiogenesis in humans. In other vertebrates their existence and role in skin remains largely unstudied. The present study characterizes for the first time the homologues of human ANGPTLs in fish and identifies the candidates that share a conserved role in skin repair using a regenerating teleost skin model over a 4-day healing period...
January 13, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28077371/markers-of-endothelial-damage-in-patients-with-chronic-kidney-disease-on-hemodialysis
#3
Andrés Carmona, Maria Luisa Agüera, Carlos Luna Ruiz, Paula Buendia, Laura Calleros, Andrea Garcia-Jerez, Manuel Rodríguez-Puyol, Manuel Arias, Marta Arias-Guillen, Gabriel de Arriba, Jose Ballarin, Carmen Bernis, Elvira Fernandez, Sagrario Garcia-Rebollo, Javier Mancha, Gloria Del Peso, Estefania Perez, Esteban Poch, Jose M Portoles, Diego Rodriguez-Puyol, Rafael Sánchez-Villanueva, Felipe Sarro, Armando Torres, Alejandro Martin-Malo, Pedro Aljama, Rafael Ramirez, Julia Carracedo
Patients with stage 5 chronic kidney disease who are on hemodialysis (HD) remain in a chronic inflammatory state, characterized by the accumulation of uremic toxins that induce endothelial damage and cardiovascular disease (CVD). Our aim was to examine microvesicles (MVs), monocyte subpopulations, and angiopoietins to identify prognostic markers in HD patients with or without diabetes mellitus (DM). A total of 160 prevalent HD patients from 10 centers across Spain were obtained from the Biobank of the Nephrology Renal Network (REDinREN, Madrid): 80 patients with diabetes mellitus (DM) and 80 patients without DM who were matched for clinical and demographic criteria...
January 11, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28075016/modulation-of-long-term-endothelial-barrier-integrity-is-conditional-to-the-cross-talk-between-akt-and-src-signaling
#4
Fei Gao, Harika Sabbineni, Sandeep Artham, Payaningal R Somanath
Although numerous studies have implicated Akt and Src kinases in vascular endothelial growth factor (VEGF) and Angiopoietin-1 (Ang-1)-induced endothelial-barrier regulation, a link between these two pathways has never been demonstrated. We determined the long-term effects of Akt inhibition on Src activity and vice versa, and in turn, on the human microvascular endothelial cell (HMEC) barrier integrity at the basal level, and in response to growth factors. Our data showed that Akt1 gene knockdown increases gap formation in HMEC monolayer at the basal level...
January 11, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28069704/angiopoietin-1-promotes-atherosclerosis-by-increasing-the-proportion-of-circulating-gr1-monocytes
#5
Takeshi Fujisawa, Keqing Wang, Xi-Lin Niu, Stuart Egginton, Shakil Ahmad, Peter Hewett, Christopher D Kontos, Asif Ahmed
AIMS: Atherosclerosis is a chronic inflammatory disease occurring within the artery wall. A crucial step in atherogenesis is the infiltration and retention of monocytes into the subendothelial space of large arteries induced by chemokines and growth factors. Angiopoietin-1 (Ang-1) regulates angiogenesis and reduces vascular permeability and has also been reported to promote monocyte migration in vitro. We investigated the role of Ang-1 in atherosclerosis-prone apolipoprotein-E (Apo-E) knockout mouse...
January 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/28066578/angiopoietin-2-marker-or-mediator-of-angiogenesis-in-continuous-flow-left-ventricular-assist-device-patients
#6
EDITORIAL
Lauren K Truby, Veli K Topkara
No abstract text is available yet for this article.
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28062977/angiopoietin-pathway-gene-expression-associated-with-poor-breast-cancer-survival
#7
Rajesh Ramanathan, Amy L Olex, Mikhail Dozmorov, Harry D Bear, Leopoldo Jose Fernandez, Kazuaki Takabe
PURPOSE: Angiogenesis is one of the hallmarks of cancer and is essential for cancer progression and metastasis. However, clinical trials with vascular endothelial growth factor (VEGF) pathway inhibitors have failed to show overall survival benefit in breast cancer. Targeted therapy against the angiopoietin pathway, a downstream angiogenesis cascade, could be effective in breast cancer. This study investigates the association of angiopoietin pathway gene expression with breast cancer survival using a "big data" approach employing RNA sequencing data from The Cancer Genome Atlas (TCGA)...
January 6, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28061513/angiopoietin-2-blockade-promotes-survival-of-corneal-transplants
#8
Liwei Zhang, Guangyu Li, Roberto Sessa, Gyeong Jin Kang, Meng Shi, Shaokui Ge, Anna Jiang Gong, Ying Wen, Sudhakar Chintharlapalli, Lu Chen
Purpose: Corneal transplantation remains the last hope for vision restoration, and lymphangiogenesis (LG) is a primary mediator of transplant rejection. This study was to investigate the specific role of angiopoietin-2 (Ang-2) in transplantation-associated LG and graft rejection. Methods: Orthotopic corneal transplantation was performed between fully mismatched C57BL/6 (donor) and BALB/c (recipient) mice to assess the effects of Ang-2 blockade via neutralizing antibody...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28058016/angptl2-expression-in-gastric-cancer-tissues-and-cells-and-its-biological-behavior
#9
Wei-Zhong Sheng, Yu-Sheng Chen, Chuan-Tao Tu, Juan He, Bo Zhang, Wei-Dong Gao
AIM: To explore expression of angiopoietin-like protein 2 (ANGPTL2) and its effect on biological behavior such as proliferation and invasiveness in gastric cancer. METHODS: Western blotting was used to detect expression of ANGPTL2 in 60 human normal gastric tissues, 60 human gastric cancer tissues and gastric cell lines including GES-1, N87, SGC7901, BGC823 and PAMC82. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and Transwell assay were used to detect the proliferation and invasive ability of gastric cancer cells...
December 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28056052/the-glucocorticoid-receptor-regulates-the-angptl4-gene-in-a-ctcf-mediated-chromatin-context-in-human-hepatic-cells
#10
Masafumi Nakamoto, Ko Ishihara, Takehisa Watanabe, Akiyuki Hirosue, Shinjiro Hino, Masanori Shinohara, Hideki Nakayama, Mitsuyoshi Nakao
Glucocorticoid signaling through the glucocorticoid receptor (GR) plays essential roles in the response to stress and in energy metabolism. This hormonal action is integrated to the transcriptional control of GR-target genes in a cell type-specific and condition-dependent manner. In the present study, we found that the GR regulates the angiopoietin-like 4 gene (ANGPTL4) in a CCCTC-binding factor (CTCF)-mediated chromatin context in the human hepatic HepG2 cells. There are at least four CTCF-enriched sites and two GR-binding sites within the ANGPTL4 locus...
2017: PloS One
https://www.readbyqxmd.com/read/28053374/ang-1-and-ang-2-expression-in-angiomyolipoma-and-pecoma-family-tumors
#11
Swati Shrestha, Carolyn Meyers, Jia Shen, Paulina Giacomelli, Michelle A Scott, Chia Soo, Sarah M Dry, Kang Ting, Aaron W James
OBJECTIVE: Perivascular epithelioid cell tumors (PEComa) are an uncommon family of soft tissue tumors. Previously, we described that the presence of pericyte antigens among PEComa family tumors differs extensively by histologic appearance. METHODS: Here, we extend our findings using the pericyte antigens Angiopoietin-1 (Ang-1) and Angiopoietin-2 (Ang-2), using immunohistochemical detection in human tumor samples. RESULTS: While Ang-1 showed no expression across any PEComa family tumor, Ang-2 showed expression that like other pericyte markers was largely determined by cytologic appearance...
March 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28052321/canonical-hedgehog-signaling-regulates-hepatic-stellate-cell-mediated-angiogenesis-in-liver-fibrosis
#12
Feng Zhang, Meng Hao, Huanhuan Jin, Zhen Yao, Naqi Lian, Li Wu, Jiangjuan Shao, Anping Chen, Shizhong Zheng
BACKGROUND AND PURPOSE: Hepatic stellate cells (HSCs) are liver-specific pericytes regulating angiogenesis during liver fibrosis. We aimed to elucidate the mechanisms by which hedgehog signaling regulated HSC angiogenic properties and to validate the therapeutic implications. EXPERIMENTAL APPROACH: Rats and mice were intoxicated with carbon tetrachloride for in vivo evaluation of hepatic angiogenesis and fibrotic injury. Diversified molecular approaches including real-time PCR, Western blot, luciferase reporter assay, chromatin immunoprecipitation, electrophoretic mobility shift assay, and co-immunoprecipitation were used to investigate the underlying mechanisms in vitro...
January 4, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28045923/germline-genetic-variants-in-tek-angpt1-angpt2-mmp9-fgf2-and-vegfa-are-associated-with-pathologic-complete-response-to-bevacizumab-in-breast-cancer-patients
#13
Issam Makhoul, Valentina K Todorova, Eric R Siegel, Stephen W Erickson, Ishwori Dhakal, Vinay R Raj, Jeannette Y Lee, Mohammed S Orloff, Robert J Griffin, Ronda S Henry-Tillman, Suzanne Klimberg, Laura F Hutchins, Susan A Kadlubar
BACKGROUND: We previously reported improved pathologic complete response (pCR) in a prospective phase II study using neoadjuvant bevacizumab in combination with chemotherapy compared to chemotherapy alone in breast cancer patients (41% vs. 25%, p = 0.0291). In this study, we queried germline single-nucleotide polymorphisms (SNPs) in angiogenesis-related genes for their impact on pCR and overall survival (OS). METHODS: DNA for genotyping was available from 34 subjects who received bevacizumab in addition to chemotherapy and 29 subjects who did not...
2017: PloS One
https://www.readbyqxmd.com/read/28045406/angiopoietin-like-protein-1-suppresses-slug-to-inhibit-cancer-cell-motility
#14
Tsang-Chih Kuo, Ching-Ting Tan, Yi-Wen Chang, Chih-Chen Hong, Wei-Jiunn Lee, Min-Wei Chen, Yung-Ming Jeng, Jean Chiou, Pei Yu, Pai-Sheng Chen, Ming-Yang Wang, Michael Hsiao, Jen-Liang Su, Min-Liang Kuo
No abstract text is available yet for this article.
January 3, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28045067/microvasculature-remodeling-in-the-mouse-lower-gut-during-inflammaging
#15
Jae-Ho Jeong, KwangSoo Kim, Daejin Lim, Kun-Hee Kim, Hyung-Seok Kim, Sungsu Lee, Joo-Hye Song, Byoung-Gon Moon, Hyon E Choy, Sang Chul Park
Inflammaging is defined as low-grade, chronic, systemic inflammation in aging, in the absence of overt infection. Age-associated deterioration of gastrointestinal function could be ascribed to the inflammaging, although evidence is yet to emerge. Here we show that microvessels in aging mouse intestine were progressively deprived of supportive structures, microvessel-associated pericytes and adherens junction protein vascular endothelial (VE)-cadherin, and became leaky. This alteration was ascribed to up-regulation of angiopoetin-2 in microvascular endothelial cells...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28043948/angptl2-expression-in-the-intestinal-stem-cell-niche-controls-epithelial-regeneration-and-homeostasis
#16
Haruki Horiguchi, Motoyoshi Endo, Kohki Kawane, Tsuyoshi Kadomatsu, Kazutoyo Terada, Jun Morinaga, Kimi Araki, Keishi Miyata, Yuichi Oike
The intestinal epithelium continually self-renews and can rapidly regenerate after damage. Dysregulation of intestinal epithelial homeostasis leads to severe inflammatory bowel disease. Additionally, aberrant signaling by the secreted protein angiopoietin-like protein 2 (ANGPTL2) causes chronic inflammation in a variety of diseases. However, little is known about the physiologic role of ANGPTL2 in normal tissue homeostasis and during wound repair following injury. Here, we assessed ANGPTL2 function in intestinal physiology and disease in vivo Although intestinal development proceeded normally in Angptl2-deficient mice, expression levels of the intestinal stem cell (ISC) marker gene Lgr5 decreased, which was associated with decreased transcriptional activity of β-catenin in Angptl2-deficient mice...
January 2, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28043350/evaluation-of-changes-in-doppler-ultrasonography-indices-and-levels-of-maternal-serum-angiogenic-factors-throughout-pregnancy-in-ewes
#17
Özge Turna Yilmaz, Mehmet Can Gündüz, Gamze Evkuran Dal, Melih Uçmak, Zeynep Günay Uçmak, Esra Karaçam, Güven Kaşikçi, Mehmet Ragip Kiliçarslan
We evaluated the changes in the pulsatility index (PI) and resistance index (RI) of fetal and maternal vessels and maternal serum angiogenic factors throughout pregnancy in 20 Kivircik ewes. They were examined for pregnancy detection on Day 30 after mating. The PI and RI during the pregnancies were followed using Doppler ultrasonography (USG) of the uterine artery, umbilical artery, fetal aorta, and fetal vena cava. Doppler USG was performed every 15 days beginning from the 40th day after mating. Blood samples were collected every 15 days starting from the day of mating...
February 2017: Theriogenology
https://www.readbyqxmd.com/read/28043115/angiopoietin-1-and-angiopoietin-2-expression-imbalance-influence-in-early-period-after-subarachnoid-hemorrhage
#18
Hua Gu, Zhen-Hai Fei, Yi-Qi Wang, Jian-Guo Yang, Chao-Hui Zhao, Yong Cai, Xing-Ming Zhong
PURPOSE: Microvascular endothelial integrity is important for maintaining the blood-brain barrier (BBB). However, subarachnoid hemorrhage (SAH) disrupts this integrity, making the BBB dysfunctional-an important pathophysiological change after SAH. Angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2) regulate microvascular permeability by balancing each other's expression. METHODS: This study investigated the dynamics of Ang-1 and Ang-2 expression after SAH and the protective effect of Ang-1 on BBB functioning using an endovascular puncture model of rat SAH...
December 2016: International Neurourology Journal
https://www.readbyqxmd.com/read/28041961/expression-of-angiopoietins-in-central-nervous-system-hemangioblastomas-is-associated-with-cyst-formation
#19
Xiang Li, Wenke Liu, Jianping Liu, Weiya Wang, Si Zhang, Jian Chen, Xuhui Hui
PURPOSE: This study aimed to determine the expression of angiopoietin-1 (Ang-1), angiopoietin-2 (Ang-2), and endothelial tyrosine kinase receptor (Tie-2) in central nervous system (CNS) hemangioblastomas (HBs) and explore the correlation with peritumoral cyst formation. METHOD: A total of 22 paraffin-embedded specimens derived from 11 cyst-associated and 11 solid solitary CNS HBs were collected for streptavidin-peroxidase immunohistochemical staining. The expression levels of Ang-1, Ang-2 and Tie-2 in cystic and solid HBs were estimated and compared according to the integrated optical density (IOD) of staining in the sections...
December 29, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/28035391/safety-and-toxicology-of-the-intravenous-administration-of-ang2%C3%A2-sirna-plasmid-chitosan-magnetic-nanoparticles
#20
Xiuying Shan, Tingting Xu, Zhaoliang Liu, Xuefeng Hu, Yan-Ding Zhang, Biao Wang
This aim of the present study was to investigate the safety and toxicology of intravenous administration of angiopoietin‑2 (Ang2)‑small interfering (si)RNA plasmid‑chitosan magnetic nanoparticles (CMNPs). Ang2‑CMNPs were constructed and subsequently administered at different doses to mice and rats via the tail vein. The acute (in mice) and chronic toxicity (in rats) were observed. The results of the acute toxicity assay revealed that the LD50 mice was >707.0 mg·kg‑1·d‑1, and the general condition of mice revealed no obvious abnormalities...
December 29, 2016: Molecular Medicine Reports
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