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Jun Zhang, Xiaolong Qian, Fangfang Liu, Xiaojing Guo, Feng Gu, Li Fu
Objective: Tamoxifen is used as a complementary treatment for estrogen receptor (ER)-positive breast cancer (BCa), but many patients developed resistance. The aim of this study was to examine the role of syndecan-binding protein (SDCBP) silencing in ER-positive BCa cells. Methods: In MCF-7/T47D cells, the effects of SDCBP silence/overexpression on cell proliferation and estrogenic response were examined. Cell proliferation was examined using the MTT assay and cell cycle regulators were examined by Western blot...
February 2018: Cancer Biology & Medicine
Nicolas Panel, Francesco Villa, Ernesto J Fuentes, Thomas Simonson
PDZ domains contain 80-100 amino acids and bind short C-terminal sequences of target proteins. Their specificity is essential for cellular signaling pathways. We studied the binding of the Tiam1 PDZ domain to peptides derived from the C-termini of its Syndecan-1 and Caspr4 targets. We used free energy perturbation (FEP) to characterize the binding energetics of one wild-type and 17 mutant complexes by simulating 21 alchemical transformations between pairs of complexes. Thirteen complexes had known experimental affinities...
March 13, 2018: Biophysical Journal
Jonathan V Martin, David M Liberati, Lawrence N Diebel
BACKGROUND: Hypernatremia is a common problem affecting critically ill patients, whether due to underlying pathology or the subsequent result of hypertonic fluid resuscitation. Numerous studies have been published suggesting that hypernatremia may adversely affect the vascular endothelial glycocalyx. Our study aimed to evaluate if high sodium concentration would impair the endothelial and glycocalyx barrier function and if stress conditions that simulate the shock microenvironment would exacerbate any observed adverse effects of hypernatremia...
March 12, 2018: Journal of Trauma and Acute Care Surgery
Tian-Tian Li, Xiang Gao, Li Gao, Bin-Liang Gan, Zu-Cheng Xie, Jing-Jing Zeng, Gang Chen
BACKGROUND: It is generally acknowledged that miRNAs play pivotal roles in the initiation and development of cancer. The aim of the current study is to investigate the clinicopathological role of miR-136-5p in lung adenocarcinoma and its underlying molecular mechanism. MATERIALS AND METHODS: Data of a cohort of 1242 samples were provided by the Gene Expression Omnibus and The Cancer Genome Atlas to evaluate miR-136-5p expression in lung adenocarcinoma. A comprehensive meta-analysis integrating the expression data from all sources was performed, followed by a summary receiver operating curve plotted to appraise the upregulated expression of miR-136-5p in lung adenocarcinoma...
February 22, 2018: Pathology, Research and Practice
Rafael S Aquino, Yvonne Hui-Fang Teng, Pyong Woo Park
Syndecan-1 (Sdc1) is a major cell surface heparan sulfate (HS) proteoglycan of epithelial cells, a cell type targeted by many bacterial pathogens early in their pathogenesis. Loss of Sdc1 in mice is a gain-of-function mutation that significantly decreases the susceptibility to several bacterial infections, suggesting that subversion of Sdc1 is an important virulence strategy. HS glycosaminoglycan (GAG) chains of cell surface Sdc1 promote bacterial pathogenesis by facilitating the attachment of bacteria to host cells...
March 9, 2018: Biochemical Society Transactions
Yu Meng Wang, Tsz Kin Ng, Kwong Wai Choy, Hoi Kin Wong, Wai Kit Chu, Chi Pui Pang, Vishal Jhanji
PURPOSE: To illustrate the histopathology of keratoconic corneal epithelia and its micro-ribonucleic acid (miRNA) regulation. METHODS: Corneal epithelia were collected from 27 patients with keratoconus and 26 normal patients after surgery or by impression cytology. The miRNA profile was determined using miRNA microarray. The biological roles of miRNA target genes were delineated by gene ontology and pathway analyses. The expressions of significant miRNAs were validated using TaqMan polymerase chain reaction (PCR), whereas protein localization and expression of the miRNA target genes were examined by immunofluorescence and immunoblotting analyses...
March 1, 2018: Journal of Refractive Surgery
Louise Mary Webster, Carolyn Gill, Paul T Seed, Kate Bramham, Cornelia Wiesender, Catherine Nelson-Piercy, Jenny E Myers, Lucy C Chappell
Black ethnicity is associated with worse pregnancy outcomes in women with chronic hypertension. Pre-existing endothelial and renal dysfunction, and poor placentation may contribute but pathophysiological mechanisms underpinning increased risk are poorly understood. This cohort study aimed to investigate the relationship between ethnicity, superimposed pre-eclampsia and longitudinal changes in markers of endothelial, renal and placental dysfunction in women with chronic hypertension. Plasma concentrations of placental growth factor (PlGF), syndecan-1, renin, aldosterone, and urinary angiotensinogen:creatinine ratio (AGTCR), protein:creatinine ratio (PCR) and albumin:creatinine ratio (ACR) were quantified during pregnancy and postpartum in women with chronic hypertension...
March 7, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
Katarzyna Herman, Malgorzata Lekka, Arkadiusz Ptak
Syndecans are transmembrane proteoglycans that, together with integrins, control cell interactions with extracellular matrix components. Despite structural similarities between all members of the syndecan family, their specific attachment to extracellular matrix proteins is defined by heparan and chondroitin chains. Here, we postulate various unbinding kinetics for each type of single syndecan complexes. Force spectroscopy data, recorded by atomic force microscope, were analysed using two theoretical approaches describing force-induced unbinding, authored by Bell-Evans and Dudko-Hummer-Szabo...
March 6, 2018: Journal of Physical Chemistry Letters
Maristela P Rangel, Vanessa K de Sá, Tabatha Prieto, João Roberto M Martins, Eloísa R Olivieri, Dirce Carraro, Teresa Takagaki, Vera Luiza Capelozzi
Matrix proteoglycans (PGs) have shown promise as biomarker in malignancies. We employed agarose gel eletrophoresis, quantitative real- time reverse transcription-polymerase chain reaction and immunohistochemistry to evaluate the content of sulfated glicosaminoglycans (chondroitin sulfate and heparan sulfate) and expression of PG (biglycan, glypican, perlecan, syndecan e versican) in patient-matched normal and tumor tissues obtained from resected specimens of lung cancer. A significant increase of heparan sulfate (HS) and chondroitin sulfate (CS) concentrations was found in tumor tissue samples when compared to normal lung tissue samples...
March 3, 2018: Glycoconjugate Journal
Steven Grant
No abstract text is available yet for this article.
March 1, 2018: Blood
Vitor H Pomin, Barbara Mulloy
In this editorial to MDPI Pharmaceuticals special issue " Glycosaminoglycans and Proteoglycans " we describe in outline the common structural features of glycosaminoglycans and the characteristics of proteoglycans, including the intracellular proteoglycan, serglycin, cell-surface proteoglycans, like syndecans and glypicans, and the extracellular matrix proteoglycans, like aggrecan, perlecan, and small leucine-rich proteoglycans. The context in which the pharmaceutical uses of glycosaminoglycans and proteoglycans are presented in this special issue is given at the very end...
February 27, 2018: Pharmaceuticals
Pedro Leme Silva, Fernanda Ferreira Cruz, Cynthia Dos Santos Samary, Lillian Moraes, Raquel Ferreira de Magalhães, Marcos Vinicius de S Fernandes, Rebeca Bose, Vitor B Pelegati, Hernandes F Carvalho, Vera Luiza Capelozzi, Joshua Satalin, Louis Gatto, Penny Andrews, Nader Habashi, Gary Nieman, Patricia R M Rocco
OBJECTIVES: To compare a time-controlled adaptive ventilation strategy, set in airway pressure release ventilation mode, versus a protective mechanical ventilation strategy in pulmonary and extrapulmonary acute respiratory distress syndrome with similar mechanical impairment. DESIGN: Animal study. SETTING: Laboratory investigation. SUBJECTS: Forty-two Wistar rats. INTERVENTIONS: Pulmonary acute respiratory distress syndrome and extrapulmonary acute respiratory distress syndrome were induced by instillation of Escherichia coli lipopolysaccharide intratracheally or intraperitoneally, respectively...
February 26, 2018: Critical Care Medicine
Xiaofeng Wang, Jinting He, Xiaoming Zhao, Tianyang Qi, Tianfu Zhang, Chenfei Kong
Epithelial-mesenchymal transition (EMT) is one of the major processes that contribute to the occurrence of cancer metastasis. EMT has been associated with the development of oral cancer. Syndecan‑1 (SDC1) is a key cell‑surface adhesion molecule and its expression level inversely correlates with tumor differentiation and prognosis. In the present study, we aimed to determine the role of SDC1 in oral cancer progression and investigate the molecular mechanisms through which SDC1 regulates the EMT and invasiveness of oral cancer cells...
February 14, 2018: Oncology Reports
R Bologna-Molina, T Mikami, V Pereira-Prado, G Tapia-Repetto, F R Pires, R Carlos, A Mosqueda-Taylor
Primordial odontogenic tumor (POT) is composed of variably cellular myxoid connective tissue, surrounded by cuboidal to columnar odontogenic epithelium resembling the inner epithelium of the enamel organ, which often invaginates into the underlying connective tissue. The tumor is delimited at least partially by a thin fibrous capsule. It derives from the early stages of tooth development. Syndecan-1 is a heparan sulfate proteoglycan that has a physiological role in several cellular functions, including maintenance of the epithelial architecture, cell-to-cell adhesion and interaction of cells with extracellular matrix, and with diverse growth factors, stimulating cell proliferation...
March 2018: Oral Diseases
Norihiko Masuda, Osamu Ogawa, Meyeon Park, Alvin Y Liu, Steve Goodison, Yunfeng Dai, Landon Kozai, Hideki Furuya, Yair Lotan, Charles J Rosser, Takashi Kobayashi
A 10-plex urine-based bladder cancer (BCa) diagnostic signature has the potential to non-invasively predict the presence of BCa in at-risk patients, as reported in various case-control studies. The present meta-analysis was performed to re-evaluate and demonstrate the robustness and consistency of the diagnostic utility of the 10-plex urine-based diagnostic assay. We re-analyzed primary data collected in five previously published case-control studies on the 10-plex diagnostic assay. Studies reported the sensitivity and specificity of ten urinary protein biomarkers for the detection of BCa, including interleukin 8, matrix metalloproteinases 9 and 10, angiogenin, apolipoprotein E, syndecan 1, alpha-1 antitrypsin, plasminogen activator inhibitor-1, carbonic anhydrase 9, and vascular endothelial growth factor A...
January 23, 2018: Oncotarget
Andrius Pranskunas, Tomas Tamosuitis, Neringa Balciuniene, Diana Damanskyte, Edvin Sneider, Astra Vitkauskiene, Edmundas Sirvinskas, Vidas Pilvinis, E Christiaan Boerma
As of now the relationship between glycocalyx degradation and microcirculatory perfusion abnormalities in non-septic critical ill patients is unclear. In addition, conjunctival sidestream dark field-imaging for the purpose of glycocalyx thickness estimation has never been performed. We aimed to investigate whether changes in glycocalyx thickness in non-septic patients are associated with microcirculatory alterations in conjunctival and sublingual mucosa. In this single-centre prospective observational study, using techniques for direct in-vivo observation of the microcirculation, we performed a single measurement of microcirculatory perfusion parameters and visualized glycocalyx thickness in both ocular conjunctiva and sublingual mucosa in mixed cardio surgical (n = 18) and neurocritical patients (n = 27) and compared these data with age-matched healthy controls (n = 20)...
February 17, 2018: Microvascular Research
Eszter Regős, Hadeer Hesham Abdelfattah, Andrea Reszegi, László Szilák, Klára Werling, Gábor Szabó, András Kiss, Zsuzsa Schaff, Ilona Kovalszky, Kornélia Baghy
Increased expression of syndecan-1 is a characteristic feature of human liver cirrhosis. However, no data are available on the significance of this alteration. To address this question we designed a transgenic mouse strain that driven by albumin promoter, expresses human syndecan-1 in the hepatocytes. Liver cirrhosis was induced by thioacetamide in wild type and hSDC1+/+ mice of the identical strain. The process of fibrogenesis, changes in signal transduction and proteoglycan expression were followed. In an in vitro experiment, the effect of syndecan-1 overexpression on the action of TGFβ1 was determined...
February 15, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
Ole Wilhelm Bøe, Kjell Sveen, Magne Børset, Kirk M Druey
BACKGROUND Systemic capillary leak syndrome (SCLS) (Clarkson's disease) is a rare disorder of unknown etiology, characterized by transient episodes of hypotension, and the microvascular leak of fluids into the peripheral tissues, resulting in edema. Between 80-90% of patients with SCLS have a concomitant monoclonal gammopathy. Although translational in vitro studies have implicated vascular endothelial barrier dysfunction in the etiology of SCLS, the etiology and disease associations in clinical cases remain unknown...
February 16, 2018: American Journal of Case Reports
Martin Frydland, Sisse Rye Ostrowski, Jacob Eifer Møller, Edina Hadziselimovic, Lene Holmvang, Hanne Berg Ravn, Lisette Okkels Jensen, Anna Sina Pettersson, Jesper Kjaergaard, Matias Greve Lindholm, Pär Ingemar Johansson, Christian Hassager
BACKGROUND: Mortality in ST-elevation myocardial infarction (STEMI)-patients developing cardiogenic shock (CS) during hospitalization is high. Catecholamines, ischemia, and inflammation (parameters present in CS) affect the endothelium. We hypothesized that plasma level of biomarkers reflecting endothelial damage would be associated with CS and mortality. METHODS: In 96% of 1467 consecutive patients with suspected STEMI, biomarkers reflecting endothelial cell- (soluble thrombomodulin, sTM) and glycocalyx- (syndecan-1) damage were measured on admission...
February 12, 2018: Shock
Charmaine J Simeonovic, Sarah K Popp, Lora M Starrs, Debra J Brown, Andrew F Ziolkowski, Barbara Ludwig, Stefan R Bornstein, J Dennis Wilson, Alberto Pugliese, Thomas W H Kay, Helen E Thomas, Thomas Loudovaris, Fui Jiun Choong, Craig Freeman, Christopher R Parish
Type 1 diabetes (T1D) is an autoimmune disease in which insulin-producing beta cells in pancreatic islets are progressively destroyed. Clinical trials of immunotherapies in recently diagnosed T1D patients have only transiently and partially impacted the disease course, suggesting that other approaches are required. Our previous studies have demonstrated that heparan sulfate (HS), a glycosaminoglycan conventionally expressed in extracellular matrix, is present at high levels inside normal mouse beta cells. Intracellular HS was shown to be critical for beta cell survival and protection from oxidative damage...
2018: PloS One
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