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https://www.readbyqxmd.com/read/28548569/thyroxine-increases-collagen-type-ii-expression-and-accumulation-in-scaffold-free-tissue-engineered-articular-cartilage
#1
G Adam Whitney, Thomas J Kean, Russell J Fernandes, Stephen D Waldman, M Yat Tse, Stephen C Pang, Joseph M Mansour, James E Dennis
Low collagen accumulation in the extra-cellular matrix is a pressing problem in cartilage tissue engineering, leading to a low collagen-to-glycosaminoglycan (GAG) ratio and poor mechanical properties in neo-cartilage. Soluble factors have been shown to increase collagen content, but may result in a more pronounced increase in GAG content. Thyroid hormones have been reported to stimulate collagen and GAG production, but reported outcomes, including which specific collagen types are affected, are variable throughout the literature...
May 26, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28527949/microproteome-of-dentoalveolar-tissues
#2
Cristiane R Salmon, Ana Paula O Giorgetti, Adriana F Paes Leme, Romênia R Domingues, Tamara N Kolli, Brian L Foster, Francisco H Nociti
Proteomic analysis of extracellular matrices (ECM) of dentoalveolar tissues can provide insights into developmental, pathological, and reparative processes. However, targeted dissection of mineralized tissues, dental cementum (DC), alveolar bone (AB), and dentin (DE), presents technical difficulties. We demonstrate an approach combining EDTA decalcification and laser capture microdissection (LCM), followed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS), to analyze proteome profiles of these tissues...
May 17, 2017: Bone
https://www.readbyqxmd.com/read/28525375/ros-enhance-angiogenic-properties-via-regulation-of-nrf2-in-tumor-endothelial-cells
#3
Takayuki Hojo, Nako Maishi, Alam Mohammad Towfik, Kosuke Akiyama, Noritaka Ohga, Masanobu Shindoh, Yasuhiro Hida, Kazuyuki Minowa, Toshiaki Fujisawa, Kyoko Hida
Reactive oxygen species (ROS) are unstable molecules that activate oxidative stress. Because of the insufficient blood flow in tumors, the tumor microenvironment is often exposed to hypoxic condition and nutrient deprivation, which induces ROS accumulation. We isolated tumor endothelial cells (TECs) and found that they have various abnormalities, although the underlying mechanisms are not fully understood. Here we showed that ROS were accumulated in tumor blood vessels and ROS enhanced TEC migration with upregulation of several angiogenesis related gene expressions...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28510506/signaling-at-the-crossroads-matrix-derived-proteoglycan-and-reactive-oxygen-species-signaling
#4
Madalina-Viviana Nastase, Andrea Janicova, Malgorzata Wygrecka, Liliana Schaefer
SIGNIFICANCE: Proteoglycans (PGs), besides their structural contribution, have emerged as dynamic components that mediate a multitude of cellular events. The various roles of PGs are attributed to their structure, spatial localization, and ability to act as ligands and receptors. Reactive oxygen species (ROS) are small mediators, which are generated in physiological and pathological conditions. Besides their reactivity and ability to induce oxidative stress, a growing body of data suggests that ROS signaling is more relevant than direct radical damage in development of human pathologies...
May 16, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28476030/biglycan-expression-in-the-melanoma-microenvironment-promotes-invasiveness-via-increased-tissue-stiffness-inducing-integrin-%C3%AE-1-expression
#5
Hana Andrlová, Justin Mastroianni, Josef Madl, Johannes S Kern, Wolfgang Melchinger, Heide Dierbach, Florian Wernet, Marie Follo, Kristin Technau-Hafsi, Cristina Has, Venugopal Rao Mittapalli, Marco Idzko, Ricarda Herr, Tilman Brummer, Hendrik Ungefroren, Hauke Busch, Melanie Boerries, Andreas Narr, Gabriele Ihorst, Claire Vennin, Annette Schmitt-Graeff, Susana Minguet, Paul Timpson, Justus Duyster, Frank Meiss, Winfried Römer, Robert Zeiser
Novel targeted and immunotherapeutic approaches have revolutionized the treatment of metastatic melanoma. A better understanding of the melanoma-microenvironment, in particular the interaction of cells with extracellular matrix molecules, may help to further improve these new therapeutic strategies.We observed that the extracellular matrix molecule biglycan (Bgn) was expressed in certain human melanoma cells and primary fibroblasts when evaluated by microarray-based gene expression analysis. Bgn expression in the melanoma tissues correlated with low overall-survival and low progression-free-survival in patients...
April 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28469930/early-extracellular-matrix-changes-are-associated-with-later-development-of-bronchiolitis-obliterans-syndrome-after-lung-transplantation
#6
Catharina Müller, Annika Andersson-Sjöland, Hans Henrik Schultz, Leif T Eriksson, Claus B Andersen, Martin Iversen, Gunilla Westergren-Thorsson
BACKGROUND: Chronic lung allograft dysfunction in the form of bronchiolitis obliterans syndrome (BOS) is the main cause of death beyond 1-year post-lung transplantation. The disease-initiating triggers as well as the molecular changes leading to fibrotic alterations in the transplanted lung are largely unknown. The aim of this study was to identify potential early changes in the extracellular matrix (ECM) in different compartments of the transplanted lung prior to the development of BOS...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28459201/altered-expression-of-small-leucine-rich-proteoglycans-decorin-biglycan-and-lumican-plausible-diagnostic-marker-in-urothelial-carcinoma-of-bladder
#7
Sandeep Appunni, Vivek Anand, Madhuram Khandelwal, Amlesh Seth, Sandeep Mathur, Alpana Sharma
Small leucine-rich proteoglycans are components of extracellular matrix that regulates neoplastic transformation. Among small leucine rich proteoglycans, Decorin, Biglycan and Lumican are most commonly implicated markers, and their expression is well studied in various malignancies. In this novel study, we have collectively evaluated expression of these three molecules in urothelial carcinoma of bladder. Thirty patients of confirmed untreated bladder cancer, 30 healthy controls for blood and 30 controls for adjacent non-tumour tissue were enrolled...
May 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28436002/characterization-of-the-chondrocyte-secretome-in-photoclickable-poly-ethylene-glycol-hydrogels
#8
Margaret C Schneider, Christopher A Barnes, Stephanie J Bryant
Poly(ethylene glycol) (PEG) hydrogels are highly tunable platforms that are promising cell delivery vehicles for chondrocytes and cartilage tissue engineering. In addition to characterizing the type of extracellular matrix (ECM) that forms, understanding the types of proteins that are secreted by encapsulated cells may be important. Thus, the objectives for this study were to characterize the secretome of chondrocytes encapsulated in PEG hydrogels and determine whether the secretome varies as a function of hydrogel stiffness and culture condition...
April 24, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28424419/integrated-analysis-of-genes-associated-with-poor-prognosis-of-patients-with-colorectal-cancer-liver-metastasis
#9
Zhenyuan Qian, Guobing Zhang, Guangyuan Song, Ji Shi, Lijie Gong, Yiping Mou, Yong Han
Colorectal cancer (CRC) is one of the most common malignances in the gut. Liver is the most common metastasis site of CRC. This study focuses on the primary CRC and its liver metastasis, aiming to discover several liver metastasis related genes and provide therapeutic candidates. We compared gene expression patterns among the groups of normal colorectal mucosa, primary tumor and the liver metastasis using a CRC gene expression dataset. 84 genes were found to be upregulated in both primary tumor and liver metastases...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28419987/extracellular-matrix-mediates-bmp-2-in-a-model-of-temporomandibular-joint-osteoarthritis
#10
Maya Shirakura, Vardit Kram, Jennifer Robinson, Sheena Sikka, Tina M Kilts, Sunil Wadhwa, Marian F Young
Temporomandibular joint (TMJ) osteoarthritis (OA) is a complex disease that affects both cartilage and subchondral bone. It is accompanied by loss of extracellular matrix (ECM) and may be controlled by bone morphogenetic protein-2 (BMP-2). We analyzed the effect of BMP-2 in both cartilage and subchondral bone in a TMJ-OA animal model that is deficient in biglycan (Bgn) and fibromodulin (Fmod) (Bgn-/-Fmod-/-). Whole mandibles were dissected from 3-week-old wild-type (WT) and Bgn-/-Fmod-/- mice and incubated with and without 250 µg/mL BMP-2 for 2 days using an explant culture system...
April 19, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28408374/expression-of-biglycan-in-first-trimester-chorionic-villous-sampling-placental-samples-and-altered-function-in-telomerase-immortalized-microvascular-endothelial-cells
#11
Amy Chui, Tilini Gunatillake, Shaun P Brennecke, Vera Ignjatovic, Paul T Monagle, John M Whitelock, Dagmar E van Zanten, Jasper Eijsink, Yao Wang, James Deane, Anthony J Borg, Janet Stevenson, Jan Jaap Erwich, Joanne M Said, Padma Murthi
OBJECTIVE: Biglycan (BGN) has reduced expression in placentae from pregnancies complicated by fetal growth restriction (FGR). We used first trimester placental samples from pregnancies with later small for gestational age (SGA) infants as a surrogate for FGR. The functional consequences of reduced BGN and the downstream targets of BGN were determined. Furthermore, the expression of targets was validated in primary placental endothelial cells isolated from FGR or control pregnancies. APPROACH AND RESULTS: BGN expression was determined using real-time polymerase chain reaction in placental tissues collected during chorionic villous sampling performed at 10 to 12 weeks' gestation from pregnancies that had known clinical outcomes, including SGA...
April 13, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28385241/synthesis-of-macromolecular-mimics-of-small-leucine-rich-proteoglycans-with-a-poly-ethylene-glycol-core-and-chondroitin-sulphate-bristles
#12
Sumona Sarkar, Carli Moorehead, Katsiaryna Prudnikova, Caroline L Schauer, Lynn S Penn, Michele Marcolongo
Small leucine-rich proteoglycans (SLRPs) are a class of molecules prevalent in almost all tissues types and are thought to be responsible for collagen organization and macro-scale biological properties. However, when they are dysfunctional or degraded, severe pathological phenotypes are observed. Here we investigate macromolecular mimics to SLRPs using poly(ethylene glycol) (PEG) as a core (replacing the protein core of natural SLRPs) and chondroitin sulphate (CS) bristle(s) in an end-on attachment (via epoxide-amine reactions), mimicking the physical structure of the natural SLRPs...
June 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28356486/caveat-emptor-for-researchers-a-rose-will-not-smell-sweet-unless-we-know-its-composition
#13
Josephine C Adams
In a recent publication in Bioscience Reports "Contaminants in commercial preparations of 'purified' small leucine-rich proteoglycans may distort mechanistic studies", Brown et al. identified by mass spectrometry and immunoblotting that certain commercial preparations of the small leucine-rich proteoglycans (SLRPs) decorin and biglycan, in fact, contained a mix of several proteoglycans that also included fibromodulin and aggrecan. The preparations were thus not suitable to study specific activities of decorin or biglycan...
June 30, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28346368/pathophysiological-significance-of-dermatan-sulfate-proteoglycans-revealed-by-human-genetic-disorders
#14
REVIEW
Shuji Mizumoto, Tomoki Kosho, Shuhei Yamada, Kazuyuki Sugahara
The indispensable roles of dermatan sulfate-proteoglycans (DS-PGs) have been demonstrated in various biological events including construction of the extracellular matrix and cell signaling through interactions with collagen and transforming growth factor-β, respectively. Defects in the core proteins of DS-PGs such as decorin and biglycan cause congenital stromal dystrophy of the cornea, spondyloepimetaphyseal dysplasia, and Meester-Loeys syndrome. Furthermore, mutations in human genes encoding the glycosyltransferases, epimerases, and sulfotransferases responsible for the biosynthesis of DS chains cause connective tissue disorders including Ehlers-Danlos syndrome and spondyloepimetaphyseal dysplasia with joint laxity characterized by skin hyperextensibility, joint hypermobility, and tissue fragility, and by severe skeletal disorders such as kyphoscoliosis, short trunk, dislocation, and joint laxity...
March 27, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28322869/scaffold-free-high-throughput-generation-of-quiescent-valvular-microtissues
#15
Annelies Roosens, Inès Puype, Ria Cornelissen
AIMS: The major challenge of working with valvular interstitial cells in vitro is the preservation or recovery of their native quiescent state. In this study, a biomimetic approach is used which aims to engineer small volume, high quality valve microtissues, having a potential in regenerative medicine and as a relevant 3D in vitro model to provide insights into valve (patho)biology. METHODS AND RESULTS: To form micro-aggregates, porcine valvular interstitial cells were seeded in agarose micro-wells and cultured in medium supplemented with 250μM Ascorbic Acid 2-phosphate for 22days...
March 18, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/28282921/biglycan-and-sphingosine-kinase-1-signaling-crosstalk-regulates-the-synthesis-of-macrophage-chemoattractants
#16
Louise Tzung-Harn Hsieh, Madalina-Viviana Nastase, Heiko Roedig, Jinyang Zeng-Brouwers, Chiara Poluzzi, Stephanie Schwalm, Christian Fork, Claudia Tredup, Ralf P Brandes, Malgorzata Wygrecka, Andrea Huwiler, Josef Pfeilschifter, Liliana Schaefer
In its soluble form, the extracellular matrix proteoglycan biglycan triggers the synthesis of the macrophage chemoattractants, chemokine (C-C motif) ligand CCL2 and CCL5 through selective utilization of Toll-like receptors (TLRs) and their adaptor molecules. However, the respective downstream signaling events resulting in biglycan-induced CCL2 and CCL5 production have not yet been defined. Here, we show that biglycan stimulates the production and activation of sphingosine kinase 1 (SphK1) in a TLR4- and Toll/interleukin (IL)-1R domain-containing adaptor inducing interferon (IFN)-β (TRIF)-dependent manner in murine primary macrophages...
March 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28214837/efficacy-of-glucosamine-sulphate-in-skin-ageing-results-from-an-ex-vivo-anti-ageing-model-and-a-clinical-trial
#17
Audrey Gueniche, Isabelle Castiel-Higounenc
BACKGROUND: Glucosamine sulphate (GS) is essential in the biosynthesis of glycolipids, glycoproteins, glycosaminoglycans (GAGs), hyaluronate, and proteoglycans. Connective tissues primarily contain collagen and proteoglycans and play an important role in skin ageing. OBJECTIVE: The objectives were to assess ex vivo the impact of GS on skin ageing parameters and in vivo the effect of GS on the skin physiology of mature healthy volunteers after oral intake. METHODS: The impact of GS on skin ageing was assessed ex vivo via different immunohistochemical assays and histology and via a clinical study using biopsies...
2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/28199387/dermatan-sulfate-is-a-player-in-the-transglutaminase-2-interaction-network
#18
Grzegorz Wisowski, Ewa M Koźma, Tomasz Bielecki, Adam Pudełko, Krystyna Olczyk
Transglutaminase 2 (TG2) is a multifunctional protein that is primarily engaged in cell adhesion/signaling or shows Ca2+-dependent transglutaminase activity in the extracellular space of tissues. This latter action leads to the cross-linking of the extracellular matrix (ECM) proteins. The enhanced extracellular expression of TG2 is associated with processes such as wound healing, fibrosis or vascular remodeling that are also characterized by a high deposition of dermatan sulfate (DS) proteoglycans in the ECM...
2017: PloS One
https://www.readbyqxmd.com/read/28131044/biglycan-expression-earlier-vascular-damage-and-pro-atherogenic-profile-improvement-after-smoke-cessation-in-young-people
#19
Giuseppe Mandraffino, Caterina Oriana Aragona, Michele Scuruchi, Federica Mamone, Angela D'Ascola, Angela Alibrandi, Maurizio Cinquegrani, Carmela Morace, Lilia Oreto, Carlo Saitta, Enricomaria Mormina, Scipione Carerj, Antonino Saitta, Egidio Imbalzano
BACKGROUND AND AIMS: Young cigarette smokers may already present with early signs of vascular inflammation and damage; biglycan (BGN) has been shown to play a critical role in the initiation and progression of vascular lesions, also in young smokers. We investigated whether after smoke cessation, monocyte BGN expression is reduced; moreover, we evaluated any improvement of pro-atherogenic profile and arterial stiffness (AS), and their relationship with BGN in abstinent smokers. METHODS: Two-hundred-fifty-one young people who had decided to quit smoking were enrolled; of these, 71 had completed the 12-month observation period maintaining smoking abstinence...
February 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28116125/use-of-fgf-2-and-fgf-18-to-direct-bone-marrow-stromal-stem-cells-to-chondrogenic-and-osteogenic-lineages
#20
Cindy Shu, Susan M Smith, Christopher B Little, James Melrose
AIM: Intervertebral disc degeneration/low back pain is the number one global musculoskeletal condition in terms of disability and socioeconomic impact. MATERIALS & METHODS: Multipotent mesenchymal stem cells (MSCs) were cultured in micromass pellets ± FGF-2 or -18 up to 41 days, matrix components were immunolocalized and gene expression monitored by quantitative-reverse transcription PCR. RESULTS: Chondrogenesis occurred earlier in FGF-18 than FGF-2 cultures...
December 2016: Future Science OA
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