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Thrombospondin

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https://www.readbyqxmd.com/read/29342156/specialized-attachment-structure-of-the-fish-pathogenic-oomycete-saprolegnia-parasitica
#1
Svetlana Rezinciuc, Jose Vladimir Sandoval-Sierra, Yolanda Ruiz-León, Pieter van West, Javier Diéguez-Uribeondo
The secondary cysts of the fish pathogen oomycete Saprolegnia parasitica possess bundles of long hooked hairs that are characteristic to this economically important pathogenic species. Few studies have been carried out on elucidating their specific role in the S. parasitica life cycle and the role they may have in the infection process. We show here their function by employing several strategies that focus on descriptive, developmental and predictive approaches. The strength of attachment of the secondary cysts of this pathogen was compared to other closely related species where bundles of long hooked hairs are absent...
2018: PloS One
https://www.readbyqxmd.com/read/29340639/biomechanical-rigidity-and-quantitative-proteomics-analysis-of-segmental-regions-of-the-trabecular-meshwork-at-physiologic-and-elevated-pressures
#2
Janice A Vranka, Julia A Staverosky, Ashok P Reddy, Phillip A Wilmarth, Larry L David, Ted S Acott, Paul Russell, Vijay Krishna Raghunathan
Purpose: The extracellular matrix (ECM) of the trabecular meshwork (TM) modulates resistance to aqueous humor outflow, thereby regulating IOP. Glaucoma, a leading cause of irreversible blindness worldwide, is associated with changes in the ECM of the TM. The elastic modulus of glaucomatous TM is larger than age-matched normal TM; however, the biomechanical properties of segmental low (LF) and high flow (HF) TM regions and their response to elevated pressure, are unknown. Methods: We perfused human anterior segments at two pressures using an ex vivo organ culture system...
January 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29338087/thrombospondin-4-acts-on-pre-synaptic-calcium-channel-alpha-2-delta-1-subunit-to-induce-synaptogenesis-between-sensory-and-spinal-cord-neurons-through-a-t-type-calcium-channel-dependent-pathway-that-is-blocked-by-early-low-dose-gabapentin-treatments
#3
Yanhui Peter Yu, Nian Gong, Tae Dong Kweon, Benjamin Vo, Z David Luo
BACKGROUND AND PURPOSE: Nerve injury induces concurrent upregulation of calcium channel alpha-2-delta-1 subunit (Cav α2 δ1 ) and extracellular matrix protein thrombospondin-4 (TSP4) in dorsal root ganglia and dorsal spinal cord, leading to neuropathic pain state development. Interactions of these proteins promote aberrant excitatory synaptogenesis that contributes to neuropathic pain state development through unknown mechanisms. We investigated the contributory role of Cav α2 δ1 /TSP4 to synaptogenesis, and pathway involved in vitro, and whether gabapentin could block this process and pain development in vivo...
January 16, 2018: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29336258/association-of-thrombospondin-1-n700s-and-thrombospondin-4-a387p-gene-polymorphisms-with-the-incidence-of-acute-myocardial-infarction-in-egyptians
#4
Mohamed Z Gad, Noura Ayman Ahmed Abdelmonem, Nancy Osama Elsayed Turky
BACKGROUND: Thrombospondin (TSP) 1 and 4 are extracellular matrix glycoproteins that mediate cell proliferation, platelet aggregation and inflammatory response. Conflicting data addressed the possible contribution of TSP-1 and TSP-4 gene polymorphisms to acute myocardial infarction (AMI). OBJECTIVE: Our study aimed to examine the association of TSP-1 (N700S) and TSP-4 (A387P) genetic variants with the incidence of AMI in Egyptians. It also correlated TSP-1 variants to TSP-1 and TNF-α serum concentrations while TSP-4 variants to IL-8 concentration identifying TSPs' contribution to vascular inflammation...
January 15, 2018: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/29328368/identification-of-significant-biomarkers-and-pathways-associated-with-gastric-carcinogenesis-by-whole-genome-wide-expression-profiling-analysis
#5
Hong-Jun Fei, Song-Chang Chen, Jun-Yu Zhang, Shu-Yuan Li, Lan-Lan Zhang, Yi-Yao Chen, Chun-Xin Chang, Chen-Ming Xu
The incidence of gastric cancer (GC) is extremely high in East Asia. GC is also one of the most common and lethal forms of cancer from a global perspective. However, to date, we have not been able to determine one or several genes as biomarkers in the diagnosis of GC and have also been unable to identify the genes which are important in the therapy of GC. In this study, we analyzed all genome-wide expression profiling arrays uploaded onto the Gene Expression Omnibus (GEO) database to filtrate the differentially expressed genes (DEGs) between normal stomach tissues and GC tissues...
January 11, 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29325573/genetic-diversity-of-three-surface-protein-genes-in-plasmodium-malariae-from-three-asian-countries
#6
Suttipat Srisutham, Naowarat Saralamba, Kanlaya Sriprawat, Mayfong Mayxay, Frank Smithuis, Francois Nosten, Sasithon Pukrittayakamee, Nicholas P J Day, Arjen M Dondorp, Mallika Imwong
BACKGROUND: Genetic diversity of the three important antigenic proteins, namely thrombospondin-related anonymous protein (TRAP), apical membrane antigen 1 (AMA1), and 6-cysteine protein (P48/45), all of which are found in various developmental stages of Plasmodium parasites is crucial for targeted vaccine development. While studies related to the genetic diversity of these proteins are available for Plasmodium falciparum and Plasmodium vivax, barely enough information exists regarding Plasmodium malariae...
January 11, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29322934/computational-analysis-reveals-the-coupling-between-bistability-and-the-sign-of-a-feedback-loop-in-a-tgf-%C3%AE-1-activation-model
#7
Huipeng Li, Lakshmi Venkatraman, Balakrishnan Chakrapani Narmada, Jacob K White, Hanry Yu, Lisa Tucker-Kellogg
BACKGROUND: Bistable behaviors are prevalent in cell signaling and can be modeled by ordinary differential equations (ODEs) with kinetic parameters. A bistable switch has recently been found to regulate the activation of transforming growth factor-β1 (TGF-β1) in the context of liver fibrosis, and an ordinary differential equation (ODE) model was published showing that the net activation of TGF-β1 depends on the balance between two antagonistic sub-pathways. RESULTS: Through modeling the effects of perturbations that affect both sub-pathways, we revealed that bistability is coupled with the signs of feedback loops in the model...
December 21, 2017: BMC Systems Biology
https://www.readbyqxmd.com/read/29321508/thrombospondin-1-secreted-by-human-umbilical-cord-blood-derived-mesenchymal-stem-cells-rescues-neurons-from-synaptic-dysfunction-in-alzheimer-s-disease-model
#8
Dong Hyun Kim, Hoon Lim, Dahm Lee, Soo Jin Choi, Wonil Oh, Yoon Sun Yang, Jeong Su Oh, Hyun Ho Hwang, Hong Bae Jeon
Alzheimer's disease (AD) is an incurable neurodegenerative disease characterised clinically by learning and memory impairments. Amyloid beta (Aβ) peptide-induced synaptic dysfunction is a pathological process associated with early-stage AD. Here, we show that paracrine action of human umbilical cord blood-derived-mesenchymal stem cells (hUCB-MSCs) protects the hippocampus from synaptic-density loss in in vitro and in vivo AD models. To identify paracrine factors underlying this rescue effect, we analysed hUCB-MSCs' secretome co-cultured with Aβ42-treated mouse hippocampal neurons...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29315262/intraarticularly-injected-mesenchymal-stem-cells-stimulate-anti-inflammatory-molecules-and-inhibit-pain-related-protein-and-chondrolytic-enzymes-in-a-monoiodoacetate-induced-rat-arthritis-model
#9
Toru Ichiseki, Miyako Shimazaki, Yoshimichi Ueda, Shusuke Ueda, Masanobu Tsuchiya, Daisuke Souma, Ayumi Kaneuji, Norio Kawahara
Persistent inflammation is well known to promote the progression of arthropathy. mesenchymal stem cells (MSCs) have been shown to possess anti-inflammatory properties and tissue differentiation potency. Although the experience so far with the intraarticular administration of mesenchymal stem cell (MSC) to induce cartilage regeneration has been disappointing, MSC implantation is now being attempted using various surgical techniques. Meanwhile, prevention of osteoarthritis (OA) progression and pain control remain important components of the treatment of early-stage OA...
January 9, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29312814/on-revealing-the-gene-targets-of-ebola-virus-micrornas-involved-in-the-human-skin-microbiome
#10
Pei-Chun Hsu, Bin-Hao Chiou, Chun-Ming Huang
Ebola virus, a negative-sense single-stranded RNA virus, causes severe viral hemorrhagic fever and has a high mortality rate. Histopathological and immunopathological analyses of Ebola virus have revealed that histopathological changes in skin tissue are associated with various degrees of endothelial cell swelling and necrosis. The interactions of microbes within or on a host are a crucial for the skin immune shield. The discovery of microRNAs (miRNAs) in Ebola virus implies that immune escape, endothelial cell rupture, and tissue dissolution during Ebola virus infection are a result of the effects of Ebola virus miRNAs...
2018: PeerJ
https://www.readbyqxmd.com/read/29310787/thrombospondins-purification-of-human-platelet-thrombospondin-1
#11
John M Sipes, Joanne E Murphy-Ullrich, David D Roberts
Thrombospondins are a family of five secreted proteins that have diverse roles in modulating cellular function. Thrombospondins-1 and 2 were identified as matricellular proteins based on their functional roles combined with their transient appearance or accumulation in extracellular matrix at specific times during development and in response to injury or stress in mature tissues. Thrombospondin-1 is a major component of platelet α-granules, which provides a convenient source for purification of the protein...
2018: Methods in Cell Biology
https://www.readbyqxmd.com/read/29296853/role-of-calcium-in-regulating-the-intra-and-extracellular-cleavage-of-von-willebrand-factor-by-the-protease-adamts13
#12
Shobhit Gogia, Anju Kelkar, Changjie Zhang, Kannayakanahalli M Dayananda, Sriram Neelamegham
von Willebrand factor (VWF) and the metalloprotease a disintegrin and metalloprotease with thrombospondin type 1 motif 13 (ADAMTS13) are present both within endothelial cells (ECs) and in peripheral blood. Calcium concentrations are lower in intracellular compartments (80-400 μM) compared with the extracellular milieu (∼1.25 mM). Because low calcium favors VWF A2-domain proteolysis by ADAMTS13, the dependence of proteolysis rates on calcium was assayed both within ECs and in blood. Confocal microscopy studies demonstrate partial perinuclear colocalization of VWF with ADAMTS13 in human umbilical vein ECs (HUVECs)...
October 24, 2017: Blood Advances
https://www.readbyqxmd.com/read/29296173/extracellular-superoxide-dismutase-inhibits-hepatocyte-growth-factor-mediated-breast-cancer-fibroblast-interactions
#13
Briana Ormsbee Golden, Brandon Griess, Shakeel Mir, Matthew Fitzgerald, Charlotte Kuperwasser, Frederick Domann, Melissa Teoh-Fitzgerald
We have previously shown tumor suppressive effects of extracellular superoxide dismutase, EcSOD in breast cancer cells. In this study, an RTK signaling array revealed an inhibitory effect of EcSOD on c-Met phosphorylation and its downstream kinase c-Abl in MDA-MB231 cells. Moreover, an extracellular protein array showed that thrombospondin 1 (TSP-1), a scavenger of the c-Met ligand, hepatocyte growth factor (HGF) is significantly up-regulated in EcSOD overexpressing cells (Ec.20). We further determined the effects of EcSOD on HGF/c-Met-mediated cancer-fibroblast interactions by co-culturing normal fibroblasts (RMF) or RMF which overexpresses HGF (RMF-HGF) with MDA-MB231 cells...
December 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/29295862/perturbed-bone-composition-and-integrity-with-disorganized-osteoblast-function-in-zinc-receptor-gpr39-deficient-mice
#14
Milena Jovanovic, Felix N Schmidt, Gali Guterman-Ram, Hanifeh Khayyeri, Sahar Hiram-Bab, Ayelet Orenbuch, Svetlana Katchkovsky, Anastasia Aflalo, Hanna Isaksson, Björn Busse, Katharina Jähn, Noam Levaot
Changes in bone matrix composition are frequently found with bone diseases and may be associated with increased fracture risk. Bone is rich in the trace element zinc. Zinc was established to play a significant role in the growth, development, and maintenance of healthy bones; however, the mechanisms underlying zinc effects on the integrity of the skeleton are poorly understood. Here, we show that the zinc receptor (ZnR)/Gpr39 is required for normal bone matrix deposition by osteoblasts. Initial analysis showed that Gpr39-deficient (Gpr39-/- ) mice had weaker bones as a result of altered bone composition...
January 2, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29291551/ghrelin-prevents-articular-cartilage-matrix-destruction-in-human-chondrocytes
#15
REVIEW
Jie Liu, Lie Cao, Xueming Gao, Zhixin Chen, Shifang Guo, Zongru He, Yaowen Qian, Yongzhi Yu, Gang Wang
Osteoarthritis (OA) is the most common form of arthritis worldwide. Excessive production of pro-inflammatory cytokines such as interleukin-1β (IL-1β) plays a key role in the pathogenesis of OA. OA is generally characterized by degradation of extracellular matrixes such as type II collagen and aggrecans mediated by matrix metalloproteinases (MMPs) and a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS). Ghrelin is a secreted peptide hormone regulating appetite and the distribution and rate of use of energy...
December 29, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29288716/thrombospondin-1-regulation-of-latent-tgf-%C3%AE-activation-a-therapeutic-target-for-fibrotic-disease
#16
REVIEW
Joanne E Murphy-Ullrich, Mark J Suto
Transforming growth factor-β (TGF-β) is a central player in fibrotic disease. Clinical trials with global inhibitors of TGF-β have been disappointing, suggesting that a more targeted approach is warranted. Conversion of the latent precursor to the biologically active form of TGF-β represents a novel approach to selectively modulating TGF-β in disease, as mechanisms employed to activate latent TGF-β are typically cell, tissue, and/or disease specific. In this review, we will discuss the role of the matricellular protein, thrombospondin 1 (TSP-1), in regulation of latent TGF-β activation and the use an antagonist of TSP-1 mediated TGF-β activation in a number of diverse fibrotic diseases...
December 27, 2017: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29287726/ccn3-secretion-is-regulated-by-palmitoylation-via-zdhhc22
#17
Yujin Kim, Hayoung Yang, Jeongki Min, Young-Jun Park, Seung Hun Jeong, Sung-Wuk Jang, Sungbo Shim
Normal extracellular secretion of nephroblastoma overexpressed (NOV, also known as CCN3) is important for the adhesion, migration, and differentiation of cells. In previous studies, we have shown that the intracellular accumulation of CCN3 inhibits the growth of prominent neurons. Increased intracellular CCN3 can be induced through various processes, such as transcription, detoxification, and posttranslational modification. In general, posttranslational modifications are very important for protein secretion...
December 26, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29285095/kaempferol-targets-estrogen-related-receptor-%C3%AE-and-suppresses-the-angiogenesis-of-human-retinal-endothelial-cells-under-high-glucose-conditions
#18
Yan Wu, Qinmei Zhang, Rui Zhang
Diabetic retinopathy (DR) is the most common complication of diabetes and a major cause of new-onset blindness in the developed world. The present study aimed to examine the effect of kaempferol on high glucose-induced human retinal endothelial cells (HRECs) in vitro. The expression levels of various mRNAs and proteins were measured by reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blotting, respectively. The target of kaempferol was determined using a luciferase reporter assay...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29259202/identification-of-new-genes-associated-to-senescent-and-tumorigenic-phenotypes-in-mesenchymal-stem-cells
#19
Joana Cristina Medeiros Tavares Marques, Déborah Afonso Cornélio, Vivian Nogueira Silbiger, André Ducati Luchessi, Sandro de Souza, Silvia Regina Batistuzzo de Medeiros
Although human mesenchymal stem cells (hMSCs) are a powerful tool for cell therapy, prolonged culture times result in replicative senescence or acquisition of tumorigenic features. To identify a molecular signature for senescence, we compared the transcriptome of senescent and young hMSCs with normal karyotype (hMSCs/n) and with a constitutional inversion of chromosome 3 (hMSC/inv). Senescent and young cells from both lineages showed differentially expressed genes (DEGs), with higher levels in senescent hMSCs/inv...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29258803/antioxidant-functionalized-polymer-capsules-to-prevent-oxidative-stress
#20
Aitor Larrañaga, Isma Liza Mohd Isa, Vaibhav Patil, Sagana Thamboo, Mihai Lomora, Marc A Fernández-Yague, Jose-Ramon Sarasua, Cornelia G Palivan, Abhay Pandit
Polymeric capsules exhibit significant potential for therapeutic applications as microreactors, where the bio-chemical reactions of interest are efficiently performed in a spatial and time defined manner due to the encapsulation of an active biomolecule (e.g., enzyme) and control over the transfer of reagents and products through the capsular membrane. In this work, catalase loaded polymer capsules functionalized with an external layer of tannic acid (TA) are fabricated via a layer-by-layer approach using calcium carbonate as a sacrificial template...
December 16, 2017: Acta Biomaterialia
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