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https://www.readbyqxmd.com/read/28926234/using-ultra-performance-liquid-chromatography-quadrupole-time-of-flight-mass-spectrometry-based-chemometrics-for-the-identification-of-anti-angiogenic-biflavonoids-from-edible-garcinia-species
#1
Ping Li, Grace Gar-Lee Yue, Hin-Fai Kwok, Chun-Lin Long, Clara Bik-San Lau, Edward J Kennelly
Garcinia xanthochymus fruits are edible and also used in traditional medicine. Our previous work showed that the isolated natural products from G. xanthochymus fruits have displayed antioxidant activity and cytotoxicity in the colon cancer cells. In this study, we developed a strategy to correlate a zebrafish angiogenesis assay with ultra-performance liquid chromatography quadrupole time of flight mass spectrometry-based chemometric analysis to identify potential anti-angiogenic activity compounds from G. xanthochymus fruits...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28920924/impaired-angiopoietin-tie2-signaling-compromises-schlemm-s-canal-integrity-and-induces-glaucoma
#2
Jaeryung Kim, Dae-Young Park, Hosung Bae, Do Young Park, Dongkyu Kim, Choong-Kun Lee, Sukhyun Song, Tae-Young Chung, Dong Hui Lim, Yoshiaki Kubota, Young-Kwon Hong, Yulong He, Hellmut G Augustin, Guillermo Oliver, Gou Young Koh
Primary open-angle glaucoma (POAG) is often caused by elevated intraocular pressure (IOP), which arises due to increased resistance to aqueous humor outflow (AHO). Aqueous humor flows through Schlemm's canal (SC), a lymphatic-like vessel encircling the cornea, and via intercellular spaces of ciliary muscle cells. However, the mechanisms underlying increased AHO resistance are poorly understood. Here, we demonstrate that signaling between angiopoietin (Angpt) and the Angpt receptor Tie2, which is critical for SC formation, is also indispensable for maintaining SC integrity during adulthood...
September 18, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28920923/all-tied-up-mechanisms-of-schlemm-s-canal-maintenance
#3
Jeremiah Bernier-Latmani, Tatiana V Petrova
Glaucoma is a leading cause of blindness, with an estimated world-wide prevalence of 3.5% in members of the population older than 40 years of age. Elevated intraocular pressure as the result of abnormal resistance to aqueous humor drainage is a major contributing, and the only preventable, factor in glaucoma development. Schlemm's canal (SC), a lymphatic-like vessel encircling the anterior portion of the eye, plays a key role in promoting aqueous humor outflow and maintenance of normal intraocular pressure...
September 18, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28915606/proteolytic-cleavages-in-the-extracellular-domain-of-receptor-tyrosine-kinases-by-membrane-associated-serine-proteases
#4
Li-Mei Chen, Karl X Chai
The epithelial extracellular membrane-associated serine proteases matriptase, hepsin, and prostasin are proteolytic modifying enzymes of the extracellular domain (ECD) of the epidermal growth factor receptor (EGFR). Matriptase also cleaves the ECD of the vascular endothelial growth factor receptor 2 (VEGFR2) and the angiopoietin receptor Tie2. In this study we tested the hypothesis that these serine proteases may cleave the ECD of additional receptor tyrosine kinases (RTKs). We co-expressed the proteases in an epithelial cell line with Her2, Her3, Her4, insulin receptor (INSR), insulin-like growth factor I receptor (IGF-1R), the platelet-derived growth factor receptors (PDGFRs) α and β, or nerve growth factor receptor A (TrkA)...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28915063/twist1-in-hypoxia-induced-pulmonary-hypertension-through-tgf%C3%AE-smad-signaling
#5
Tadanori Mammoto, Megan Muyleart, G Ganesh Konduri, Akiko Mammoto
Pulmonary hypertension (PH) is a devastating pulmonary vascular disease characterized by aberrant muscularization of the normally non-muscularized distal pulmonary arterioles. The expression of the transcription factor, Twist1, increases in the lungs of pulmonary arterial hypertension patients. However, the mechanisms by which Twist1 controls the pathogenesis of PH remain unclear. It is becoming clear that endothelial-to-mesenchymal transition (EndMT) contributes to various vascular pathologies including PH; Twist1 is known to mediate EndMT...
September 15, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28902891/tems-but-not-dkk1-could-serve-as-complementary-biomarkers-for-afp-in-diagnosing-afp-negative-hepatocellular-carcinoma
#6
Liping Mao, Yueguo Wang, Delin Wang, Gang Han, Shouzhong Fu, Jianxin Wang
BACKGROUND & AIMS: Hepatitis B virus (HBV)-related hepatocellular carcinoma (HCC) is prevalent worldwide. Despite its limitations, serum alpha-fetoprotein (AFP) remains the most widely-used biomarker for the diagnosis of HCC. This study aimed to assess whether measurement of peripheral plasma Dickkopf-1 (DKK1) and Tie2-expressing monocytes (TEMs) could overcome the limitations of AFP and improve the diagnostic accuracy of HCC. METHODS: Plasma DKK1 level and the percentage of TEMs in peripheral CD14+CD16+ monocytes from HCC patients (n = 82), HBV-related liver cirrhosis (LC) patients (n = 29), chronic hepatitis B (CHB) infected patients (n = 28) and healthy volunteers (n = 31) were analyzed by ELISA and flow cytometry...
2017: PloS One
https://www.readbyqxmd.com/read/28901393/lps%C3%A2-induced-downregulation-of-microrna%C3%A2-204-211-upregulates-and-stabilizes-angiopoietin%C3%A2-1-mrna-in-ea-hy926-endothelial-cells
#7
Yijun Zhang, Caixia Gan, Jiangbo Zhang, Dong Chen
Angiopoietin‑1 (ANG‑1), a ligand of the endothelial cell‑specific TIE2 surface receptor, acts in a complementary and coordinated manner with vascular endothelial growth factor during the process of angiogenesis. ANG‑1 can be used as a clinically informative biomarker of disease severity and outcome in severe sepsis. The epithelium‑specific Ets transcription factor 1 can activate ANG‑1 transcription in the setting of inflammation; however, relatively little is known about the regulation of ANG‑1 by microRNAs (miRs)...
August 30, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28898232/crosstalk-between-tems-and-endothelial-cells-modulates-angiogenesis-and-metastasis-via-igf1-igf1r-signalling-in-epithelial-ovarian-cancer
#8
Xinjing Wang, Qinyi Zhu, Yingying Lin, Li Wu, Xiaoli Wu, Kai Wang, Qizhi He, Congjian Xu, Xiaoping Wan, Xipeng Wang
BACKGROUND: Epithelial ovarian cancer (EOC) is the leading cause of death from gynaecologic malignancies and has a poor prognosis due to metastasis. Drugs targeting the angiogenesis pathway significantly improve patient outcome. However, the key factors linking angiogenesis and metastasis have not been elucidated. In this study, we found Tie2 expressing monocytes (CD14(+)Tie2(+), TEMs) as key contributors to angiogenesis and metastasis of EOC. METHODS: Tissue slides were evaluated by immunofluorescence for the presence of total tissue macrophages and TEMs...
September 12, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28894119/evidence-for-biochemical-barrier-restoration-topical-solenopsin-analogs-improve-inflammation-and-acanthosis-in-the-kc-tie2-mouse-model-of-psoriasis
#9
Jack L Arbiser, Ron Nowak, Kellie Michaels, Yuliya Skabytska, Tilo Biedermann, Monica J Lewis, Michael Y Bonner, Shikha Rao, Linda C Gilbert, Nabiha Yusuf, Isabella Karlsson, Yi Fritz, Nicole L Ward
Psoriasis is a chronic inflammatory skin disease affecting 2.5-6 million patients in the United States. The cause of psoriasis remains unknown. Previous human and animal studies suggest that patients with a susceptible genetic background and some stimulus, such as barrier disruption, leads to a coordinated signaling events involving cytokines between keratinocytes, endothelial cells, T cells, macrophages and dendritic cells. Ceramides are endogenous skin lipids essential for maintaining skin barrier function and loss of ceramides may underlie inflammatory and premalignant skin...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28861341/blockade-of-angiopoietin-2-tie2-signaling-pathway-specifically-promotes-inflammation-induced-angiogenesis-in-mouse-cornea
#10
Zhi-Xin Yan, Yi Luo, Ning-Fei Liu
AIM: To investigate angiopoietin-2 (Ang-2)/Tie2 signaling pathway involving in inflammatory angiogenesis. METHODS: Three interrupted 11-0 nylon sutures were placed into the corneal stroma of BALB/c mice (6wk old) to induce inflammatory neovascularization. Expression of Ang-2 and Tie2 protein on neovascularization were examined by immunofluorescence. The dynamic expression of Ang-2 mRNA on neovascularization was examined by quantitative real-time reverse transcriptase-polymerase chain reaction (RT-PCR)...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28852070/overexpression-of-c-type-natriuretic-peptide-in-endothelial-cells-protects-against-insulin-resistance-and-inflammation-during-diet-induced-obesity
#11
Cho-Rong Bae, Jun Hino, Hiroshi Hosoda, Yuji Arai, Cheol Son, Hisashi Makino, Takeshi Tokudome, Tsutomu Tomita, Toru Kimura, Takashi Nojiri, Kiminori Hosoda, Mikiya Miyazato, Kenji Kangawa
The endogenous peptide C-type natriuretic peptide (CNP) binds its receptor, guanylyl cyclase B (GCB), and is expressed by endothelial cells in diverse tissues. Because the endothelial cells of visceral adipose tissue have recently been reported to play a role in lipid metabolism and inflammation, we investigated the effects of CNP on features of obesity by using transgenic (Tg) mice in which CNP was placed under the control of the Tie2 promoter and was thus overexpressed in endothelial cells (E-CNP). Here we show that increased brown adipose tissue thermogenesis in E-CNP Tg mice increased energy expenditure, decreased mesenteric white adipose tissue (MesWAT) fat weight and adipocyte hypertrophy, and prevented the development of fatty liver...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28838996/the-selective-tie2-inhibitor-rebastinib-blocks-recruitment-and-function-of-tie2hi-macrophages-in-breast-cancer-and-pancreatic-neuroendocrine-tumors
#12
Allison S Harney, George S Karagiannis, Jeanine Pignatelli, Bryan D Smith, Ece Kadioglu, Scott C Wise, Molly M Hood, Michael D Kaufman, Cynthia B Leary, Wei-Ping Lu, Gada Al-Ani, Xiaoming Chen, David Entenberg, Maja H Oktay, Yarong Wang, Lawrence Chun, Michele De Palma, Joan G Jones, Daniel L Flynn, John S Condeelis
Tumor-infiltrating myeloid cells promote tumor progression by mediating angiogenesis, tumor cell intravasation and metastasis, which can offset the effects of chemotherapy, radiation, and anti-angiogenic therapy. Here, we show that the kinase switch control inhibitor rebastinib inhibits Tie2, a tyrosine kinase receptor expressed on endothelial cells and pro-tumoral Tie2-expressing macrophages in mouse models of metastatic cancer. Rebastinib reduces tumor growth and metastasis in an orthotopic mouse model of metastatic mammary carcinoma through reduction of Tie2+ myeloid cell infiltration, anti-angiogenic effects, and blockade of tumor cell intravasation mediated by perivascular Tie2Hi/Vegf-AHi macrophages in the tumor microenvironment of metastasis (TMEM)...
August 24, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28831080/dynamic-heterogeneous-endothelial-tie2-expression-and-capillary-blood-flow-during-microvascular-remodeling
#13
Molly R Kelly-Goss, Bo Ning, Anthony C Bruce, Daniel N Tavakol, David Yi, Song Hu, Paul A Yates, Shayn M Peirce
Microvascular endothelial cell heterogeneity and its relationship to hemodynamics remains poorly understood due to a lack of sufficient methods to examine these parameters in vivo at high resolution throughout an angiogenic network. The availability of surrogate markers for functional vascular proteins, such as green fluorescent protein, enables expression in individual cells to be followed over time using confocal microscopy, while photoacoustic microscopy enables dynamic measurement of blood flow across the network with capillary-level resolution...
August 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818232/review-of-the-endothelial-pathogenic-mechanism-of-tie2-related-venous-malformation
#14
REVIEW
Zhong Du, JiaWei Zheng, ZhiYuan Zhang, YanAn Wang
BACKGROUND: Venous malformation (VM) is a type of disease involving vascular morphogenesis in humans. Clinically, VM can be sporadic or inherited. TIE2, also known as TEK or HYK, is a member of the receptor tyrosine kinase subfamily and is highly conserved among species. In 1996, an arginine-to-tryptophan substitution at position 849 (R849W) in TIE2 was found to induce hereditary VM. Additional alterations in TIE2 involved in the pathogenesis of inherited or sporadic VM have since been reported...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28798084/a-small-population-of-liver-endothelial-cells-undergoes-endothelial-to-mesenchymal-transition-in-response-to-chronic-liver-injury
#15
Jordi Ribera, Montse Pauta, Pedro Melgar-Lesmes, Bernat Cordoba, Anna Bosch, Maria Calvo, Daniel Rodrigo-Torres, Pau Sancho-Bru, Aurea Mira, Wladimiro Jimenez, Manuel Morales-Ruiz
BACKGROUND AND AIMS: Rising evidence points to endothelial-to-mesenchymal transition (EndMT) as a significant source of the mesenchymal cell population in fibrotic diseases. In this context, we hypothesized that liver endothelial cells undergo EndMT during fibrosis progression. METHODS: Cirrhosis in mice was induced by CCl4 A transgenic mouse expressing a red fluorescent protein reporter under the control of Tie2 promoter (Tie2-tdTomato) was used to trace the acquisition of EndMT...
August 10, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28791669/strategies-for-preventing-peritoneal-fibrosis-in-peritoneal-dialysis-patients-new-insights-based-on-peritoneal-inflammation-and-angiogenesis
#16
REVIEW
Zhen Zhang, Na Jiang, Zhaohui Ni
Peritoneal dialysis (PD) is an established form of renal replacement therapy. Long-term PD leads to morphologic and functional changes to the peritoneal membrane (PM), which is defined as peritoneal fibrosis, a known cause of loss of peritoneal ultrafiltration capacity. Inflammation and angiogenesis are key events during the pathogenesis of peritoneal fibrosis. This review discusses the pathophysiology of peritoneal fibrosis and recent research progress on key fibrogenic molecular mechanisms in peritoneal inflammation and angiogenesis, including Toll-like receptor ligand-mediated, NOD-like receptor protein 3/interleukin-1β, vascular endothelial growth factor, and angiopoietin-2/Tie2 signaling pathways...
September 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28776404/angiogenic-and-inflammatory-biomarkers-in-the-differentiation-of-pulmonary-hypertension
#17
Joanna Säleby, Habib Bouzina, Jakob Lundgren, Göran Rådegran
OBJECTIVES: Pulmonary hypertension (PH) is a serious condition where diagnosis often is delayed due to unspecific symptoms. New methods to diagnose and differentiate PH earlier would therefore be of great value. The aim of this study was therefore to evaluate the relationship between circulating angiogenic and inflammatory biomarkers and various hemodynamic variables in relation to different causes of PH. DESIGN: Plasma samples from 63 patients at diagnosis were extracted from Lund Cardio Pulmonary Register, separated into pulmonary arterial hypertension (PAH, n = 22), chronic thromboembolic pulmonary hypertension (CTEPH, n = 15) and left heart disease (LHD) with (n = 21) and without (n = 5) PH...
October 2017: Scandinavian Cardiovascular Journal: SCJ
https://www.readbyqxmd.com/read/28765024/amd3100-accelerates-reendothelialization-of-neointima-in-rabbit-saccular-aneurysm-after-flow-diverter-treatment
#18
Zifu Li, Rui Zhao, Xinggen Fang, Jiahao Zhou, Guoquan Jiang, Qinghai Huang, Jianmin Liu
OBJECTIVE: To inspect the role of AMD3100 that acts as an antagonist of SDF-1/CXCR4 on the formation of neointima in rabbit saccular aneurysm after flow diverter (FD) treatment. METHODS: Twenty saccular aneurysm models were established by using porcine pancreatic elastase. Three weeks later, a FDs of Tubridge was implanted into the saccular aneurysm. All treated models were immediately divided into two groups: the AMD3100 group was subcutaneously injected with AMD3100 (5 mg/kg per day), while control group with saline...
July 29, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28760776/tie2-associates-with-caveolae-and-regulates-caveolin-1-to-promote-their-nuclear-translocation
#19
Mohammad B Hossain, Rehnuma Shifat, Jingyi Li, Xuemei Luo, Kenneth R Hess, Yisel Rivera-Molina, Francisco P Martinez, Hong Jiang, Frederick F Lang, Mien-Chie Hung, Juan Fueyo, Candelaria Gomez-Manzano
DNA repair pathways are aberrant in cancer, enabling tumor cells to survive standard therapies-chemotherapy and radiotherapy. Our group previously reported that, upon irradiation, the membrane-bound tyrosine kinase receptor TIE2 translocates into the nucleus and phosphorylates histone H4 at Tyr51, recruiting ABL1 to the DNA repair complexes that participate in the non-homologous end-joining pathway. However, no specific molecular mechanisms of TIE2 endocytosis have been reported. Here, we show that irradiation or ligand-induced TIE2 trafficking is dependent on caveolin-1, the main component of caveolae...
July 31, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28760743/hypoxia-inducible-protein-2-hig2-hilpda-mediates-neutral-lipid-accumulation-in-macrophages-and-contributes-to-atherosclerosis-in-apolipoprotein-e-deficient-mice
#20
Anja Maier, Hao Wu, Nada Cordasic, Peter Oefner, Barbara Dietel, Christoph Thiele, Alexander Weidemann, Kai-Uwe Eckardt, Christina Warnecke
Recently we identified hypoxia-inducible protein 2 (HIG2)/hypoxia-inducible lipid droplet associated (HILPDA) as lipid droplet (LD) protein. Because HILPDA is highly expressed in atherosclerotic plaques, we examined its regulation and function in murine macrophages, compared it to the LD adipose differentiation-related protein (Adrp)/perilipin 2 (Plin2), and investigated its effects on atherogenesis in apolipoprotein E-deficient (ApoE(-/-)) mice. Tie2-Cre-driven Hilpda knockout (cKO) did not affect viability, proliferation, and ATP levels in macrophages...
July 31, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
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