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https://www.readbyqxmd.com/read/28934103/investigating-the-interaction-of-cyclic-rgd-peptidomimetics-with-%C3%AE-v%C3%AE-%C3%A2-integrin-by-biochemical-and-molecular-docking-studies
#1
Monica Civera, Daniela Arosio, Francesca Bonato, Leonardo Manzoni, Luca Pignataro, Simone Zanella, Cesare Gennari, Umberto Piarulli, Laura Belvisi
The interaction of a small library of cyclic RGD (Arg-Gly-Asp) peptidomimetics with αVβ₆ integrin has been investigated by means of competitive solid phase binding assays to the isolated receptor and docking calculations in the crystal structure of the αVβ₆ binding site. To this aim, a rigid receptor-flexible ligand docking protocol has been set up and then applied to predict the binding mode of the cyclic RGD peptidomimetics to αVβ₆ integrin. Although the RGD interaction with αVβ₆ recapitulates the RGD binding mode observed in αVβ₃, differences between the integrin binding pockets can strongly affect the ligand binding ability...
September 21, 2017: Cancers
https://www.readbyqxmd.com/read/28933201/glioma-and-microenvironment-dual-targeted-nanocarrier-for-improved-antiglioblastoma-efficacy
#2
Xiuzhen Wang, Qing Zhang, Lingyan Lv, Junjie Fu, Yan Jiang, Hongliang Xin, Qizheng Yao
Drug delivery systems based on nanoparticles (nano-DDS) have aroused attentions for the treatment of glioblastoma (GBM), the most malignant brain cancer with a dismal prognosis. However, there are still numerous unmet challenges for traditional nano-DDS, such as the poor nanoparticle penetration, short retention in the GBM parenchyma and low glioma targeting ability. Herein, we used Pep-1 and CREKA peptides to construct a novel multifunctional GBM targeting nano-DDS (PC-NP). Pep-1 was used to overcome the blood-brain tumor barrier (BBTB) and home to glioma cells via interleukin-13 receptor-α2-mediated endocytosis, and CREKA was used to bind to fibrin-fibronectin complexes abundantly expressed in tumor microenvironment for enhanced retention in the GBM...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28932220/chalcone-attenuates-staphylococcus-aureus-virulence-by-targeting-sortase-a-and-alpha-hemolysin
#3
Bing Zhang, Zihao Teng, Xianhe Li, Gejin Lu, Xuming Deng, Xiaodi Niu, Jianfeng Wang
Staphylococcus aureus (S.aureus) resistance, considered a dilemma for the clinical treatment of this bacterial infection, is becoming increasingly intractable. Novel anti-virulence strategies will undoubtedly provide a path forward in combating these resistant bacterial infections. Sortase A (SrtA), an enzyme responsible for anchoring virulence-related surface proteins, and alpha-hemolysin (Hla), a pore-forming cytotoxin, have aroused great scientific interest, as they have been regarded as targets for promising agents against S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28932144/peri-implantitis-and-extracellular-matrix-antibodies-a-case-control-study
#4
Piero Papi, Stefano Di Carlo, Daniele Rosella, Francesca De Angelis, Mario Capogreco, Giorgio Pompa
OBJECTIVE: The aim of this case-control study was to compare patients with a healthy peri-implant environment and patients affected by peri-implantitis, evaluating the occurrence of antibodies to extracellular matrix (ECM) molecules. The authors hypothesized the presence of ECM autoantibodies in serum of peri-implantitis patients. MATERIALS AND METHODS: Patients were divided into two groups: one with dental implants with a diagnosis of peri-implantitis and one control group with implants classified as being "healthy...
July 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28931787/heparin-induces-the-mobilization-of-heart-derived-multipotent-mesoangioblasts-during-cardiac-surgery-with-cardiopulmonary-bypass-or-cardiac-catheterization
#5
Yoshihiro Hata, Masayoshi Iwasaki, Keisuke Fujitaka, Haengnam Park, Daisuke Sato, Chiharu Enoki, Naoki Minato, Keita Horitani, Miyuki Nakano, Hiroshi Kishimoto, Kensaku Wada, Masamichi Koyanagi, Yasushi Adachi, Yoshihiro Yamamoto, Andreas M Zeiher, Stefanie Dimmeler, Ichiro Shiojima
BACKGROUND: We previously identified circulating mesoangioblasts (cMABs), a subset of mesenchymal stem cells that express cardiac mesodermal markers, in patients undergoing cardiac surgery with cardiopulmonary bypass (CPB). We also found that hepatocyte growth factor (HGF) is upregulated during cardiac surgery with CPB in humans, and induces MAB-like cell mobilization in rodents. These results strongly suggest that heparin induced MAB mobilization via HGF upregulation. Here, we tested this hypothesis in patients undergoing cardiac surgery or cardiac catheterization...
September 21, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28931761/periodontal-induced-chronic-inflammation-triggers-macrophage-secretion-of-ccl12-to-inhibit-fibroblast-mediated-cardiac-wound-healing
#6
Kristine Y DeLeon-Pennell, Rugmani Padmanabhan Iyer, Osasere K Ero, Courtney A Cates, Elizabeth R Flynn, Presley L Cannon, Mira Jung, De'Aries Shannon, Michael R Garrett, William Buchanan, Michael E Hall, Yonggang Ma, Merry L Lindsey
Chronic inflammatory diseases, such as periodontal disease, associate with adverse wound healing in response to myocardial infarction (MI). The goal of this study was to elucidate the molecular basis for impaired cardiac wound healing in the setting of periodontal-induced chronic inflammation. Causal network analysis of 168 inflammatory and extracellular matrix genes revealed that chronic inflammation induced by a subseptic dose of Porphyromonas gingivalis lipopolysaccharide (LPS) exacerbated infarct expression of the proinflammatory cytokine Ccl12...
September 21, 2017: JCI Insight
https://www.readbyqxmd.com/read/28931556/cancer-associated-fibroblasts-lead-tumor-invasion-through-integrin-%C3%AE-3-dependent-fibronectin-assembly
#7
Youmna Attieh, Andrew G Clark, Carina Grass, Sophie Richon, Marc Pocard, Pascale Mariani, Nadia Elkhatib, Timo Betz, Basile Gurchenkov, Danijela Matic Vignjevic
Cancer-associated fibroblasts (CAFs) are the most abundant cells of the tumor stroma. Their capacity to contract the matrix and induce invasion of cancer cells has been well documented. However, it is not clear whether CAFs remodel the matrix by other means, such as degradation, matrix deposition, or stiffening. We now show that CAFs assemble fibronectin (FN) and trigger invasion mainly via integrin-αvβ3. In the absence of FN, contractility of the matrix by CAFs is preserved, but their ability to induce invasion is abrogated...
September 20, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28931526/cellubrevin-vesicle-associated-membrane-protein-3-vamp-3-mediated-endocytosis-and-trafficking-regulate-platelet-functions
#8
Meenakshi Banerjee, Smita Joshi, Jinchao Zhang, Carole L Moncman, Shilpi Yadav, Beth A Bouchard, Brian Storrie, Sidney W Whiteheart
Endocytosis is key to fibrinogen (Fg) uptake, trafficking of integrins (αIIbβ3, αvβ3) and purinergic receptors (P2Y1, P2Y12), and thus for normal platelet function. However, the molecular machinery required and possible trafficking routes are still ill-defined. To further identify elements of the platelet endocytic machinery, we examined the role of a vesicle-residing, Soluble N-ethylmaleimide Factor Attachment Protein Receptor (v-SNARE) called Cellubrevin/Vesicle-Associated Membrane Protein-3 (VAMP-3) in platelet function...
September 20, 2017: Blood
https://www.readbyqxmd.com/read/28931523/contribution-of-myo-inositol-oxygenase-in-age-rage-mediated-renal-tubulo-interstitial-injury-in-the-context-of-diabetic-nephropathy
#9
Isha Sharma, Rashmi S Tupe, Aryana K Wallner, Yashpal S Kanwar
Advanced glycation end products (AGEs) play a role in pathogenesis of diabetic nephropathy (DN). Myo-inositol Oxygenase (MIOX) has been implicated in tubulo-interstitial injury in the context of DN. We investigated the effect of AGEs on MIOX expression and delineated mechanisms that lead to tubulo-interstitial injury. Status of MIOX, RAGE and relevant cellular signaling pathways activated following AGE:RAGE interaction were examined in tubular cells and kidneys of AGE-BSA treated mice. Solid phase assay revealed an enhanced binding of RAGE with AGE-BSA, -laminin and -collagen IV...
September 20, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28929861/ulipristal-acetate-and-extracellular-matrix-production-in-human-leiomyomas-in-vivo-a-laboratory-analysis-of-a-randomized-placebo-controlled-trial
#10
Jeris Cox, Minnie Malik, Joy Britten, Terrence Lewis, William H Catherino
In a prior randomized controlled study, patients treated with ulipristal acetate (UPA) or placebo for 3 months had a decrease in leiomyoma size. A total of 10 patients' tissue samples (5 placebo and 5 treated with 10 mg/d UPA) that underwent hysterectomy and tissue preservation were identified from this study. Quantitative real-time reverse transcriptase polymerase chain reaction and Western blotting were used to assess fold gene and protein expression of extracellular membrane (ECM) proteins: collagen 1A (COL1A), fibronectin (FN1), and versican (VCAN) of the samples...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28929492/potent-antitumor-effect-of-tumor-microenvironment-targeted-oncolytic-adenovirus-against-desmoplastic-pancreatic-cancer
#11
Yan Li, JinWoo Hong, Joung-Eun Oh, A-Rum Yoon, Chae-Ok Yun
Pancreatic cancer is a leading cause of cancer-related death. Desmoplastic pancreatic tumors exhibit excessive extracellular matrix (ECM) and are thus highly resistant to anticancer therapeutics, since the ECM restricts drug penetration and dispersion. Here, we designed and generated two hypoxia-responsive and cancer-specific hybrid promoters, H(mT)E and H(E)mT. Transgene expression driven by each hybrid promoter was markedly higher under hypoxic conditions than normoxic conditions. Moreover, H(E)mT-driven transgene expression was highly cancer-specific and was superior to that of H(mT)E-driven expression...
September 20, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28928212/population-and-whole-genome-sequence-based-characterization-of-invasive-group-a-streptococci-recovered-in-the-united-states-during-2015
#12
Sopio Chochua, Ben J Metcalf, Zhongya Li, Joy Rivers, Saundra Mathis, Delois Jackson, Robert E Gertz, Velusamy Srinivasan, Ruth Lynfield, Chris Van Beneden, Lesley McGee, Bernard Beall
Group A streptococci (GAS) are genetically diverse. Determination of strain features can reveal associations with disease and resistance and assist in vaccine formulation. We employed whole-genome sequence (WGS)-based characterization of 1,454 invasive GAS isolates recovered in 2015 by Active Bacterial Core Surveillance and performed conventional antimicrobial susceptibility testing. Predictions were made for genotype, GAS carbohydrate, antimicrobial resistance, surface proteins (M family, fibronectin binding, T, R28), secreted virulence proteins (Sda1, Sic, exotoxins), hyaluronate capsule, and an upregulated nga operon (encodes NADase and streptolysin O) promoter (Pnga3)...
September 19, 2017: MBio
https://www.readbyqxmd.com/read/28927140/itraq-coupled-2d-lc-ms-ms-analysis-of-cxcr7-transfected-papillary-thyroid-carcinoma-cells-a-new-insight-into-cxcr7-regulation-of-papillary-thyroid-carcinoma-progression-and-identification-of-potential-biomarkers
#13
Hengwei Zhang, Lei Yang, Zhangyi Liu, Chenxi Liu, Xuyong Teng, Lei Zhang, Bo Yin, Zhen Liu
Previous studies have demonstrated that C-X-C chemokine receptor type 7 (CXCR7) regulates papillary thyroid carcinoma (PTC) growth and metastasis; however, the molecular mechanisms underlying this regulation remain unclear. In the present study, the protein expression profiles of the PTC cell line GLAG-66 and GLAG-66 cells stably transfected with CXCR7 cDNA were analyzed and compared using isobaric tag for relative and absolute quantification-coupled two-dimensional liquid chromatography-tandem mass spectrometry...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28925879/human-fibronectin-extra-domain-b-edb-speci%C3%AF-c-aptide-aptedb-radiolabelling-with-technetium-99m-as-a-potent-targeted-tumour-imaging-agent
#14
Mohsen Mohammadgholi, Nourollah Sadeghzadeh, Mostafa Erfani, Saeid Abediankenari, Seyed Mohammad Abedi, Iman Emrarian, Narjes Jafari, Ramezan Behzadi
BACKGROUND: Human fibronectin extra-domain B (EDB) is particularly expressed during angiogenesis progression. It is, thus, a promising marker of tumour growth. Aptides are a novel class of peptides with high-affinity binding to specific protein targets. APTEDB is an antagonist-like ligand that especially interacts with human fibronectin EDB. OBJECTIVE: This study was the first attempt in which the hydrazinonicotinamide (HYNIC)-conjugated APTEDB was labelled with technetium-99m (99mTc) as an appropriate radiotracer and tricine/EDDA exchange labeling ...
September 18, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28923350/ascorbate-starvation-alters-endoplasmic-reticulum-resident-enzymes-in-cardiac-fibroblasts-priming-them-for-increased-procollagen-secretion
#15
Randy T Cowling, Joong Il Park, Ayodeji E Sotimehin, Barry H Greenberg
Since ascorbate is unnecessary for cell growth and survival, cardiac fibroblasts are routinely cultured without it. However, ascorbate is necessary for optimal collagen synthesis, so we hypothesized that its presence would influence cell phenotype. Cardiac fibroblasts cultured without ascorbate had increased intracellular levels of procollagens, with procollagen α1(III) showing the largest accumulation. Endoplasmic reticulum (ER)-resident proteins that are known to bind single-stranded procollagens were also elevated...
September 15, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28922731/shikonin-suppresses-pulmonary-fibroblasts-proliferation-and-activation-by-regulating-akt-and-p38-mapk-signaling-pathways
#16
Yunjuan Nie, Yaoyao Yang, Jian Zhang, Guowei Cai, Yanhua Chang, Gaoshang Chai, Chongyong Guo
Fibroblast is believed to be the primary effector in idiopathic pulmonary fibrosis (IPF), a progressive lung disorder characterized by aberrant tissue remodeling and the formation of fibroblastic foci. Due to the complicated etiology and mechanism, there are few effective drugs for this fatal disease. Shikonin (SHI), which is the major ingredient isolated from the plant Lithospermum Erythrorhizon, has long been used as traditional medicine for many diseases including inflammation and cancer. The roles of SHI in attenuating skin scar and renal fibrosis by reducing TGFβ1-stimulated fibroblast activation are also reported...
September 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28920957/klf4-dependent-perivascular-cell-plasticity-mediates-pre-metastatic-niche-formation-and-metastasis
#17
Meera Murgai, Wei Ju, Matthew Eason, Jessica Kline, Daniel W Beury, Sabina Kaczanowska, Markku M Miettinen, Michael Kruhlak, Haiyan Lei, Jack F Shern, Olga A Cherepanova, Gary K Owens, Rosandra N Kaplan
A deeper understanding of the metastatic process is required for the development of new therapies that improve patient survival. Metastatic tumor cell growth and survival in distant organs is facilitated by the formation of a pre-metastatic niche that is composed of hematopoietic cells, stromal cells and extracellular matrix (ECM). Perivascular cells, including vascular smooth muscle cells (vSMCs) and pericytes, are involved in new vessel formation and in promoting stem cell maintenance and proliferation. Given the well-described plasticity of perivascular cells, we hypothesized that perivascular cells similarly regulate tumor cell fate at metastatic sites...
September 18, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28920862/enhanced-endothelium-epithelial-sodium-channel-signaling-prompts-left-ventricular-diastolic-dysfunction-in-obese-female-mice
#18
Guanghong Jia, Javad Habibi, Annayya R Aroor, Michael A Hill, Vincent G DeMarco, Li E Lee, Lixin Ma, Brady J Barron, Adam Whaley-Connell, James R Sowers
OBJECTIVE: Enhanced activation of cell specific mineralocorticoid receptors (MRs) in obesity plays a key role in the development of cardiovascular disease including cardiac diastolic dysfunction as a critical prognosticator. Our previous investigations demonstrated that selective endothelium MR activation promotes a maladaptive inflammatory response and fibrosis in cardiovascular tissue in female mice fed a western diet (WD), and this was associated with expression and activation of the epithelial sodium channel on the surface of endothelial cells (EnNaC)...
September 8, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/28916555/first-person-seth-zimmerman
#19
(no author information available yet)
First Person is a series of interviews with the first authors of a selection of papers published in Journal of Cell Science, helping early-career researchers promote themselves alongside their papers. Seth Zimmerman is the first author on 'Cells lay their own tracks - optogenetic Cdc42 activation stimulates fibronectin deposition supporting directed migration', published in Journal of Cell Science. Seth completed the work in this article as a PhD student under the supervision of Jim Bear and Brian Kuhlman at University of North Carolina at Chapel Hill, USA...
September 15, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28916188/mast-cell-chymase-decreases-the-severity-of-group-b-streptococcus-infections
#20
Claire Gendrin, Nicholas J Shubin, Erica Boldenow, Sean Merillat, Morgan Clauson, Danny Power, Kelly S Doran, Magnus Abrink, Gunnar Pejler, Lakshmi Rajagopal, Adrian M Piliponsky
BACKGROUND: Group B Streptococcus (GBS) or Streptococcus agalactiae are ß-hemolytic, Gram-positive bacteria that colonize the lower genital tract of women and are frequently associated with infections during pregnancy. Innate immune defenses are critical for controlling GBS dissemination and systemic infection. Mast cells are resident sentinel cells that come into contact with pathogens early during colonization and infection. OBJECTIVE: We aimed to investigate the contribution of chymase to systemic GBS infection and rates of preterm birth...
September 12, 2017: Journal of Allergy and Clinical Immunology
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