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https://www.readbyqxmd.com/read/29132435/vasculotide-reduces-pulmonary-hyperpermeability-in-experimental-pneumococcal-pneumonia
#1
Birgitt Gutbier, Xiaohui Jiang, Kristina Dietert, Carolin Ehrler, Jasmin Lienau, Paul Van Slyke, Harold Kim, Van C Hoang, Jason T Maynes, Daniel J Dumont, Achim D Gruber, Norbert Weissmann, Timothy J Mitchell, Norbert Suttorp, Martin Witzenrath
BACKGROUND: Community-acquired pneumonia (CAP) is a significant cause of morbidity and mortality worldwide. Despite effective antimicrobial therapy, CAP can induce pulmonary endothelial hyperpermeability resulting in life-threatening lung failure due to an exaggerated host-pathogen interaction. Treatment of acute lung injury is mainly supportive because key elements of inflammation-induced barrier disruption remain undetermined. Angiopoietin-1 (Ang-1)-mediated Tie2 activation reduces, and the Ang-1 antagonist Ang-2 increases, inflammation and endothelial permeability in sepsis...
November 13, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29128541/a-pegylated-platelet-free-plasma-hydrogel-based-composite-scaffold-enables-stable-vascularization-and-targeted-cell-delivery-for-volumetric-muscle-loss
#2
Amit Aurora, Nicole Wrice, Thomas J Walters, Robert J Christy, Shanmugasundaram Natesan
Extracellular matrix (ECM) scaffolds are being used for the clinical repair of soft tissue injuries. Although improved functional outcomes have been reported, ECM scaffolds show limited tissue specific remodeling response with concomitant deposition of fibrotic tissue. One plausible explanation is the regression of blood vessels which may be limiting the diffusion of oxygen and nutrients across the scaffold. Herein we develop a composite scaffold as a vasculo-inductive platform by integrating PEGylated platelet free plasma (PFP) hydrogel with a muscle derived ECM scaffold (m-ECM)...
November 8, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29104145/the-dual-effects-of-a-novel-peptibody-on-angiogenesis-inhibition-and-m2-macrophage-polarization-on-sarcoma
#3
Xiaoqing Zhu, Jiali Yang, Yanfeng Gao, Chunjing Wu, Lili Yi, Guodong Li, Yuanming Qi
Inhibition of the VEGF/VEGF receptor (VEGFR) and angiopoietin-2 (Ang-2)/TEK receptor tyrosine kinase (Tie-2) pathway is a potential target for tumor angiogenesis. We previously showed that a peptide AS16 which dually inhibits VEGFR/Ang-2 could reduce the tumor growth and decrease the number of microvessels in tumor. However, its short circulating half-life in the serum limits its clinical applications. In this study, as an effort to prolong the short in vivo half-life of AS16, we designed a fusion protein containing peptide AS16 and an IgG Fc fragment...
November 2, 2017: Cancer Letters
https://www.readbyqxmd.com/read/29102175/discovery-of-novel-anti-angiogenesis-agents-part-7-multitarget-inhibitors-of-vegfr-2-tie-2-and-ephb4
#4
Chuansheng Li, Yuanyuan Shan, Ying Sun, Ru Si, Liyuan Liang, Xiaoyan Pan, Binghe Wang, Jie Zhang
Herein, we embarked on a structural optimization campaign aiming at the discovery of second generation anti-angiogenesis agents with our previously reported BPS-7 as lead compound. A library of 27 compounds has been afforded based on the highly conserved ATP-binding pocket of VEGFR-2, Tie-2, and EphB4. Several title compounds exhibited simultaneous inhibitory effects against three angiogenic RTKs. These compounds with a 'triplet' inhibition profile have been identified as novel anti-angiogenic and anticancer agents...
December 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29073721/microrna-381-induced-down-regulation-of-cxcr4-promotes-the-proliferation-of-renal-tubular-epithelial-cells-in-rat-models-of-renal-ischemia-reperfusion-injury
#5
Gui-Hong Zheng, Xin Wen, Yong-Jian Wang, Xin-Rui Han, Qun Shan, Wang Li, Tian Zhao, Dong-Mei Wu, Jun Lu, Yuan-Lin Zheng
This study aims to explore whether microRNA-381 (miR-381) mediating CXCR4 affects the renal tubular epithelial cells (RTEC) of renal ischemia reperfusion (I/R) injury. Forty-eight rats were assigned into the I/R (n = 24, successfully established as I/R model) and sham (n = 24) groups. After collecting kidney tissues, immunohistochemistry and microvascular density (MVD) counting were conducted for CXCR4 positive expression and MVD numbers. RTECs were assigned into the sham, blank, negative control (NC), miR-381 mimics, miR-381 inhibitor, si-CXCR4, and miR-381 inhibitor + si-CXCR4 groups...
October 26, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29066268/do-skin-lacerations-imply-tissue-transfer-from-surgeon-to-patient-during-arthroscopic-knot-tying
#6
Matthew B Burn, Heidi L Holtorf, Kevin M Smith, Derek T Bernstein, Domenica A Delgado, Nickarr Prudhomme, Michael T Deavers, Patrick C McCulloch, Joshua D Harris
PURPOSE: To use simulated arthroscopic knot tying to assess (1) whether epithelial cells from the surgeon's hands were transmitted to the suture and (2) whether the number of knots tied or the presence of glove tears would correlate with the number of cells transmitted. METHODS: Knots were tied in a simulated arthroscopic environment using a nonabsorbable No. 2 suture over a metal hook. The surgeon was double gloved for each knot tied. For each "anchor," a surgeon's knot was tied, followed by 3 reversed half-hitches on alternating posts...
October 21, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29050231/a-phase-i-study-of-foretinib-plus-erlotinib-in-patients-with-previously-treated-advanced-non-small-cell-lung-cancer-canadian-cancer-trials-group-ind-196
#7
Natasha B Leighl, Ming-Sound Tsao, Geoffrey Liu, Dongsheng Tu, Cheryl Ho, Frances A Shepherd, Nevin Murray, John R Goffin, Garth Nicholas, Shingo Sakashita, Zhuo Chen, Lucia Kim, Jean Powers, Lesley Seymour, Glenwood Goss, Penelope A Bradbury
PURPOSE: MET and AXL mediate resistance to EGFR TKI in NSCLC. Foretinib, a MET/RON/AXL/TIE-2/VEGFR kinase inhibitor may overcome EGFR kinase resistance. This dose escalation study combined foretinib and erlotinib in advanced pretreated NSCLC patients. EXPERIMENTAL DESIGN: The primary endpoint was to define the RP2D of foretinib plus erlotinib as continuous oral daily dosing. Secondary objectives included safety, pharmacokinetics, response and potential biomarkers of response including EGFR, KRAS genotype, MET, AXL expression, and circulating HGF levels...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29032031/discovery-of-novel-anti-angiogenesis-agents-part-8-diaryl-thiourea-bearing-1h-indazole-3-amine-as-multi-target-rtks-inhibitors
#8
Ying Sun, Yuanyuan Shan, Chuansheng Li, Ru Si, Xiaoyan Pan, Binghe Wang, Jie Zhang
VEGFR-2, TIE-2, and EphB4 are essential for both angiogenesis and tumorigenesis. Herein, we designed and prepared three classes of multi-target inhibitors based on the extensive sequence homology along the kinase domain of angiogenic RTKs. Biological evaluation indicated that these multi-target inhibitors exhibited considerable potential as novel anti-angiogeneic and anticancer agents. Among them, a diaryl thiourea bearing 1H-indazole-3-amine (16a) displayed the most potent RTK inhibition and excellent selectivity...
December 1, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28987818/the-anti-apoptotic-effect-of-fluid-mechanics-preconditioning-by-cells-membrane-and-mitochondria-in-rats-brain-microvascular-endothelial-cells
#9
Shan Tian, Fengping Zhu, Ruiping Hu, Song Tian, Xingxing Chen, Dan Lou, Bing Cao, Qiulei Chen, Bai Li, Fang Li, Yulong Bai, Yi Wu, Yulian Zhu
Exercise preconditioning is a simple and effective way to prevent ischemia. This paper further provided the mechanism in hemodynamic aspects at the cellular level. To study the anti-apoptotic effects of fluid mechanics preconditioning, Cultured rats brain microvascular endothelial cells were given fluid intervention in a parallel plate flow chamber before oxygen glucose deprivation. It showed that fluid mechanics preconditioning could inhibit the apoptosis of endothelial cells, and this process might be mediated by the shear stress activation of Tie-2 on cells membrane surface and Bcl-2 on the mitochondria surface...
October 5, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28979738/role-of-angiopoietins-and-tie-2-in-diabetic-retinopathy
#10
Nervana Khalaf, Hazem Helmy, Hany Labib, Iman Fahmy, Mona Abd El Hamid, Leqaa Moemen
OBJECTIVE: The aim of this study was to determine the serum levels of angiopoietin-1 (Ang-1), angiopoietin-2 (Ang-2), soluble vascular endothelial tyrosine kinase receptor (Tie-2) and vascular endothelial growth factor (VEGF), in the serum of type 2 diabetic patients having non-proliferative (NPDR) or proliferative diabetic retinopathy (PDR). METHODS: One hundred patients with type 2 diabetes mellitus were involved in this cross-sectional study. They were classified into 25 diabetic patients without retinopathy, 35 patients with NPDR and 40 PDR patients...
August 2017: Electronic Physician
https://www.readbyqxmd.com/read/28967470/involvement-of-synovial-matrix-degradation-and-angiogenesis-in-oxidative-stress-exposed-degenerative-rotator-cuff-tears-with-osteoarthritis
#11
Kyu-Cheol Noh, Sin-Hye Park, Cheol Jung Yang, Geun Woo Lee, Min Ki Kim, Young-Hee Kang
BACKGROUND: Shoulder osteoarthritis is a gradual wearing of the articular cartilage concomitant with degenerative rotator cuff tears (RCTs). This pathologic disorder is related to inflammation, oxidative stress, and angiogenesis. Degenerative alterations may prompt production of cytokines and angiogenesis-related proteins, evoking rotator cuff diseases. This study tested the hypothesis that oxidative stress-responsive mediators can influence joint inflammation of patients with RCT. METHODS: Twelve healthy RCT patients not suffering shoulder osteoarthritis were categorized as the control group, and 24 patients were allocated to 2 RCT groups (RCTP1 and RCTP2), according to severity of RCT and glenohumeral arthritis...
September 26, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28956197/bone-marrow-sinusoidal-endothelium-damage-and-potential-regeneration-following-cancer-radiotherapy-or-chemotherapy
#12
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/28925558/endothelial-precursor-cell-cross-match-using-tie-2-enriched-spleen-cells
#13
Volker Daniel, Caner Süsal, Sabine Scherer, Hien Tran, Petra Gombos, Karina Trojan, Mahmoud Sadeghi, Christian Morath, Gerhard Opelz
BACKGROUND: Non-HLA antibodies against human endothelial progenitor cells (EPC) in pre-transplant recipient serum can have a deleterious influence on the graft. EPC enriched from peripheral blood have been commonly used for EPC cross-matching. In the present study, we describe cross-matches using EPC enriched from fresh or frozen-thawed spleen cell preparations, thereby widening the sample source for deceased-donor cross-matching and retrospective studies. METHODS: EPC cross-matches were performed retrospectively using spleen cells and the flow cytometric XM-ONE cross-match test kit...
September 19, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28918499/the-levels-of-circulating-proangiogenic-factors-in-migraineurs
#14
Slawomir Michalak, Alicja Kalinowska-Lyszczarz, Danuta Wegrzyn, Anna Thielemann, Krystyna Osztynowicz, Wojciech Kozubski
Migraine has been reported as a risk factor for ischemic stroke or cardiovascular events, and dysfunction of endothelial cells has been evidenced in migraine patients. Proangiogenic factors are potential endothelial stimulators, and their disturbances can link abnormalities of endothelium with increased risk of vascular disorders. The aim of this study was to evaluate the levels of circulating proangiogenic factors in sera of migraineurs during interictal period. Fifty-two patients aged 37.9 ± 9.6 years, fulfilling International Headache Society criteria for migraine, were included in this observational case-control study...
December 2017: Neuromolecular Medicine
https://www.readbyqxmd.com/read/28901392/negative-pressure-wound-therapy-regulating-blood-flow-perfusion-and-microvessel-maturation-through-microvascular-pericytes
#15
Zhanjun Ma, Zonghuan Li, Kangquan Shou, Chao Jian, Pengcheng Li, Yahui Niu, Baiwen Qi, Aixi Yu
Negative pressure wound therapy (NPWT) has been demonstrated to accelerate wound healing by promoting angiogenesis. However, whether blood flow perfusion is regulated by microvessel maturation and pericytes following NPWT remains unclear, as well as the exact association between pericytes and collagen type IV. The aim of this study was to investigate the relevant association between blood flow perfusion and microvessel maturation and pericytes following NPWT, and to further explore the underlying molecular mechanisms...
November 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28865902/immediate-auditory-feedback-is-superior-to-other-types-of-feedback-for-basic-surgical-skills-acquisition
#16
Mohammed J Al Fayyadh, Ramy A Hassan, Zachary K Tran, Jason W Kempenich, Leonid Bunegin, Daniel L Dent, Ross E Willis
OBJECTIVE: We examined the effect of timing and type of feedback on medical students' knot-tying performance using visual versus auditory and immediate versus delayed feedback. We hypothesized that participants who received immediate auditory feedback would outperform those who received delayed and visual feedback. METHODS: Sixty-nine first- and second-year medical students were taught to tie 2-handed knots. All participants completed 3 pretest knot-tying trials without feedback...
August 30, 2017: Journal of Surgical Education
https://www.readbyqxmd.com/read/28782793/alginate-gelatin-encapsulation-of-human-endothelial-cells-promoted-angiogenesis-in-in-vivo-and-in-vitro-milieu
#17
Sorour Nemati, Aysa Rezabakhsh, Ali Baradar Khoshfetrat, Alireza Nourazarian, Çığır Biray Avci, Bakiye Goker Bagca, Hamed Alizadeh Sardroud, Majid Khaksar, Mahdi Ahmadi, Aref Delkhosh, Emel Sokullu, Reza Rahbarghazi
Up to present, many advantages have been achieved in the field of cell-based therapies by applying sophisticated methodologies and delivery approaches. Microcapsules are capable to provide safe microenvironment for cells during transplantation in a simulated physiological 3D milieu. Here, we aimed to investigate the effect of alginate-gelatin encapsulation on angiogenic behavior of human endothelial cells over a period of 5 days. Human umbilical vein endothelial cells were encapsulated by alginate-gelatin substrate and incubated for 5 days...
December 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28756707/emerging-vascular-endothelial-growth-factor-antagonists-to-treat-neovascular-age-related-macular-degeneration
#18
REVIEW
Rehan M Hussain, Thomas A Ciulla
Evolving anti-vascular endothelial growth factor (VEGF) treatments for neovascular age-related macular degeneration (nAMD) include long acting agents, combination strategies involving new pathways, topical agents, sustained-release, and genetic therapy strategies. Areas covered: Brolucizumab and abicipar pegol have smaller molecular size, facilitating higher concentrations and potentially longer duration than current anti-VEGF agents. Agents being combined with anti-VEGFs include OPT-302 (to inhibit VEGF-C and VEGF-D); pegpleranib and rinucumab (to inhibit platelet derived growth factor, PDGF - but both failed to show consistently improved visual outcomes compared to anti-VEGF monotherapy); and RG7716, ARP-1536 and nesvacumab (to activate the Tie-2 tyrosine kinase receptor, which reduces permeability)...
September 2017: Expert Opinion on Emerging Drugs
https://www.readbyqxmd.com/read/28732797/functional-convergence-of-akt-protein-with-vegfr-1-in-human-endothelial-progenitor-cells-exposed-to-sera-from-patient-with-type-2-diabetes-mellitus
#19
Mehdi Hassanpour, Aysa Rezabakhsh, Reza Rahbarghazi, Alireza Nourazarian, Mohammad Nouri, Çığır Biray Avci, Shahrooz Ghaderi, Neda Alidadyani, Bakiye Goker Bagca, Hesam Saghaei Bagheri
Diabetes mellitus type 2 predisposes patients to various microvascular complications. In the current experiment, the potent role of diabetes mellitus was investigated on the content of VEGFR-1, -2, Tie-1 and -2, and Akt in human endothelial progenitor cells. The gene expression profile of mTOR and Hedgehog signaling pathways were measured by PCR array. The possible crosstalk between RTKs, mTOR and Hedgehog signaling was also studied by bioinformatic analysis. Endothelial progenitor cells were incubated with serum from normal and diabetic for 7days...
July 18, 2017: Microvascular Research
https://www.readbyqxmd.com/read/28720059/cervical-cancer-cell-derived-angiopoietins-promote-tumor-progression
#20
Ping Yang, Na Chen, Dongyun Yang, Janet Crane, Bangxing Huang, Ruiqing Dong, Xiaoqing Yi, Jing Guo, Jing Cai, Zehua Wang
Metastatic or recurrent cervical cancer has limited treatment options and a high rate of mortality. Although anti-vascular endothelial growth factor drugs have shown great promise as a therapeutic target for treatment of advanced cervical cancer, drug resistance and class-specific side effects negate long-term benefits. The identification of alternative anti-angiogenic factors will be critical for future drug development for advanced or recurrent cervical cancer. In this study, we found that angiopoietins and Tie receptors were highly expressed in cervical cancer cells...
July 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
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