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Tenascin integrin

Yoshiyuki Kobayashi, Shigeo Yoshida, Yedi Zhou, Takahito Nakama, Keijiro Ishikawa, Yuki Kubo, Mitsuru Arima, Shintaro Nakao, Toshio Hisatomi, Yasuhiro Ikeda, Akira Matsuda, Koh-Hei Sonoda, Tatsuro Ishibashi
Tenascin-C is expressed in choroidal neovascular (CNV) membranes in eyes with age-related macular degeneration (AMD). However, its role in the pathogenesis of CNV remains to be elucidated. Here we investigated the role of tenascin-C in CNV formation. In immunofluorescence analyses, tenascin-C co-stained with α-SMA, pan-cytokeratin, CD31, CD34, and integrin αV in the CNV membranes of patients with AMD and a mouse model of laser-induced CNV. A marked increase in the expression of tenascin-C mRNA and protein was observed 3 days after laser photocoagulation in the mouse CNV model...
September 26, 2016: Laboratory Investigation; a Journal of Technical Methods and Pathology
Haiyan Fu, Yuan Tian, Lili Zhou, Dong Zhou, Roderick J Tan, Donna B Stolz, Youhua Liu
Kidney fibrosis initiates at certain focal sites in which the fibrogenic niche provides a specialized microenvironment that facilitates fibroblast activation and proliferation. However, the molecular identity of these fibrogenic niches is poorly characterized. Here, we determined whether tenascin-C (TNC), an extracellular matrix glycoprotein, is a component of the fibrogenic niche in kidney fibrosis. In vivo, TNC expression increased rapidly in kidneys subjected to unilateral ureteral obstruction or ischemia/reperfusion injury and predominantly localized at the foci rich in fibroblasts in renal interstitium...
September 9, 2016: Journal of the American Society of Nephrology: JASN
Ravi Thakur, Durga Prasad Mishra
Matricellular proteins (MCPs) are the non-structural extracellular matrix (ECM) proteins with various regulatory functions. MCPs are critical regulators of ECM homeostasis and are often found dysregulated in various malignancies. They interact with various ECM structural proteins like integrins, growth factor receptors and growth factors to modulate their availability and activity. Cancer supporting MCPs are known to induce proliferation, migration and invasion of cancer cells. MCPs also support cancer stem (like) cell growth and induce a drug resistant state...
September 2, 2016: Pharmacology & Therapeutics
Melissa R Andrews, Sara Soleman, Menghon Cheah, David A Tumbarello, Matthew R J Mason, Elizabeth Moloney, Joost Verhaagen, Jean-Charles Bensadoun, Bernard Schneider, Patrick Aebischer, James W Fawcett
The regenerative ability of CNS axons decreases with age, however, this ability remains largely intact in PNS axons throughout adulthood. These differences are likely to correspond with age-related silencing of proteins necessary for axon growth and elongation. In previous studies, it has been shown that reintroduction of the α9 integrin subunit (tenascin-C receptor, α9) that is downregulated in adult CNS can improve neurite outgrowth and sensory axon regeneration after a dorsal rhizotomy or a dorsal column crush spinal cord lesion...
July 2016: ENeuro
Nicola Chiarelli, Giulia Carini, Nicoletta Zoppi, Chiara Dordoni, Marco Ritelli, Marina Venturini, Marco Castori, Marina Colombi
Joint hypermobility syndrome/Ehlers-Danlos syndrome hypermobility type (JHS/EDS-HT), is likely the most common systemic heritable connective tissue disorder, and is mostly recognized by generalized joint hypermobility, joint instability complications, minor skin changes and a wide range of satellite features. JHS/EDS-HT is considered an autosomal dominant trait but is still without a defined molecular basis. The absence of (a) causative gene(s) for JHS/EDS-HT is likely attributable to marked genetic heterogeneity and/or interaction of multiple loci...
2016: PloS One
Edward Helal-Neto, Renata M Brandão-Costa, Roberta Saldanha-Gama, Cristiane Ribeiro-Pereira, Victor Midlej, Marlene Benchimol, Verônica Morandi, Christina Barja-Fidalgo
The unique composition of tumor-produced extracellular matrix (ECM) can be a determining factor in changing the profile of endothelial cells in the tumor microenvironment. As the main receptor for ECM proteins, integrins can activate a series of signaling pathways related to cell adhesion, migration, and differentiation of endothelial cells that interact with ECM proteins. We studied the direct impact of the decellularized ECM produced by a highly metastatic human melanoma cell line (MV3) on the activation of endothelial cells and identified the intracellular signaling pathways associated with cell differentiation...
November 2016: Journal of Cellular Physiology
Menghon Cheah, Melissa R Andrews, Daniel J Chew, Elizabeth B Moloney, Joost Verhaagen, Reinhard Fässler, James W Fawcett
UNLABELLED: After CNS injury, axon regeneration is blocked by an inhibitory environment consisting of the highly upregulated tenascin-C and chondroitin sulfate proteoglycans (CSPGs). Tenascin-C promotes growth of axons if they express a tenascin-binding integrin, particularly α9β1. Additionally, integrins can be inactivated by CSPGs, and this inhibition can be overcome by the presence of a β1-binding integrin activator, kindlin-1. We examined the synergistic effect of α9 integrin and kindlin-1 on sensory axon regeneration in adult rat spinal cord after dorsal root crush and adeno-associated virus transgene expression in dorsal root ganglia...
July 6, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Rainer Kluger, Joerg Burgstaller, Claus Vogl, Gottfried Brem, Michal Skultety, Simone Mueller
Evidence for a heritable predisposition to rotator cuff tears (RCTs) is growing. Unrelated Caucasian individuals with surgically diagnosed full thickness RCTs (cases) and elderly Caucasian controls with intact rotator cuffs were screened for differences at the candidate genes: TNC, Col5A1, TIMP-1, MMP-1, MMP-2, MMP-3, MMP-9, and MMP-13. A first cohort (59 cases; 32 controls) was genotyped with the Sequenom MassARRAY iPLEX system. Of 142 SNPs within about 67 kbp of the TNC gene, 30 were tested for differences in proportions between cases and controls...
June 1, 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
Yoshiyuki Kobayashi, Shigeo Yoshida, Yedi Zhou, Takahito Nakama, Keijiro Ishikawa, Mitsuru Arima, Shintaro Nakao, Yukio Sassa, Atsunobu Takeda, Toshio Hisatomi, Yasuhiro Ikeda, Akira Matsuda, Koh-Hei Sonoda, Tatsuro Ishibashi
PURPOSE: We previously demonstrated that tenascin-C was highly expressed in the fibrovascular membranes (FVMs) of patients with proliferative diabetic retinopathy (PDR). However, its role in the pathogenesis of FVMs has not been determined. The purpose of this study was to investigate what role tenascin-C plays in the formation and angiogenesis of FVMs. METHODS: The level of tenascin-C was determined by sandwich enzyme-linked immunosorbent assay in the vitreous samples collected from patients with PDR and with a macular hole as control...
2016: Molecular Vision
Eric J Berns, Zaida Álvarez, Joshua E Goldberger, Job Boekhoven, John A Kessler, H Georg Kuhn, Samuel I Stupp
UNLABELLED: Biomimetic materials that display natural bioactive signals derived from extracellular matrix molecules like laminin and fibronectin hold promise for promoting regeneration of the nervous system. In this work, we investigated a biomimetic peptide amphiphile (PA) presenting a peptide derived from the extracellular glycoprotein tenascin-C, known to promote neurite outgrowth through interaction with β1 integrin. The tenascin-C mimetic PA (TN-C PA) was found to self-assemble into supramolecular nanofibers and was incorporated through co-assembly into PA gels formed by highly aligned nanofibers...
June 2016: Acta Biomaterialia
Jian-Cang Ma, Xin Huang, Ya-Wei Shen, Chen Zheng, Qing-Hua Su, Jin-Kai Xu, Jun Zhao
Tenascin-C (TN-C) is an extracellular matrix glycoprotein markedly upregulated during liver fibrosis. The study is performed to explore the role of TN-C during the growth and activation of hepatic stellate cells (HSCs). We found that TN-C was accumulated accompanying with the HSC activation. Our data on cell migration assay revealed that the rTN-C treatment enhanced HSC migration in a dose- and time-dependent manner, but did not influence their proliferation. HSCs transfected with pTARGET-TN-C overexpression vector displayed increased the type I collagen (Col I) production...
August 2016: Bioscience, Biotechnology, and Biochemistry
Juxing Chen, Guillermo Tellez, Jeffery Escobar
Footpad dermatitis (FPD) is a type of skin inflammation that causes necrotic lesions on the plantar surface of the footpads in commercial poultry, with significant animal welfare, and economic implications. To identify biomarkers for FPD development and wound healing, a battery cage trial was conducted in which a paper sheet was put on the bottom of cages to hold feces to induce FPD of broilers. Day-of-hatch Ross 308 male broiler chicks were fed a corn-soybean meal diet and assigned to 3 treatments with 8 cages per treatment and 11 birds per cage...
2016: Frontiers in Cellular and Infection Microbiology
Anna Afasizheva, Alexus Devine, Heather Tillman, King Leung Fung, Wilfred D Vieira, Benjamin H Blehm, Yorihisa Kotobuki, Ben Busby, Emily I Chen, Kandice Tanner
BACKGROUND: Intrinsic and acquired resistance to drug therapies remains a challenge for malignant melanoma patients. Intratumoral heterogeneities within the tumor microenvironment contribute additional complexity to the determinants of drug efficacy and acquired resistance. METHODS: We use 3D biomimetic platforms to understand dynamics in extracellular matrix (ECM) biogenesis following pharmaceutical intervention against mitogen-activated protein kinases (MAPK) signaling...
2016: BMC Cancer
Hala Kufaishi, May Alarab, Harold Drutz, Stephen Lye, Oksana Shynlova
BACKGROUND: This study tested a hypothesis that primary human vaginal cells derived from tissue of premenopausal women with severe pelvic organ prolapse (POP-HVCs) would display differential functional characteristics as compared to vaginal cells derived from asymptomatic women with normal pelvic floor support (control-HVCs). METHODS: Vaginal tissue biopsies were collected from premenopausal patients with POP (n = 8) and asymptomatic controls (n = 7) during vaginal hysterectomy or repair...
July 2016: Reproductive Sciences
Louise F Porter, Roberto Gallego-Pinazo, Catherine L Keeling, Martyna Kamieniorz, Nicoletta Zoppi, Marina Colombi, Cecilia Giunta, Richard Bonshek, Forbes D Manson, Graeme C Black
BACKGROUND: Brittle cornea syndrome (BCS) is a rare, generalized connective tissue disorder associated with extreme corneal thinning and a high risk of corneal rupture. Recessive mutations in transcription factors ZNF469 and PRDM5 cause BCS. Both transcription factors are suggested to act on a common pathway regulating extracellular matrix genes, particularly fibrillar collagens. We identified bilateral myopic choroidal neovascularization as the presenting feature of BCS in a 26-year-old-woman carrying a novel PRDM5 mutation (p...
2015: Orphanet Journal of Rare Diseases
Zhanhu Zhang, Bin Yu, Yun Gu, Songlin Zhou, Tianmei Qian, Yongjun Wang, Guohui Ding, Fei Ding, Xiaosong Gu
Peripheral nerve regeneration requires precise coordination and dynamic interaction among various types of cells in the tissue. It remains unclear, however, whether the cellular crosstalk between fibroblasts and Schwann cells (SCs) is related to phenotype modulation of SCs, a critical cellular process after peripheral nerve injury. In this study, microarray analysis revealed that a total of 6,046 genes were differentially expressed in the proximal nerve segment after sciatic nerve transection in rats, and bioinformatics analysis further identified tenascin-C (TNC), an extracellular matrix (ECM) protein, as a key gene regulator...
March 2016: Glia
Naoshi Shimojo, Ryotaro Hashizume, Kazuki Kanayama, Mari Hara, Yuka Suzuki, Tomohiro Nishioka, Michiaki Hiroe, Toshimichi Yoshida, Kyoko Imanaka-Yoshida
Tenascin-C (TN-C) is an extracellular matrix protein not detected in normal adult heart, but expressed in several heart diseases closely associated with inflammation. Accumulating data suggest that TN-C may play a significant role in progression of ventricular remodeling. In this study, we aimed to elucidate the role of TN-C in hypertensive cardiac fibrosis and underlying molecular mechanisms. Angiotensin II was administered to wild-type and TN-C knockout mice for 4 weeks. In wild-type mice, the treatment induced increase of collagen fibers and accumulation of macrophages in perivascular areas associated with deposition of TN-C and upregulated the expression levels of interleukin-6 and monocyte chemoattractant protein-1 as compared with wild-type/control mice...
October 2015: Hypertension
Kasey M Johnson, Richard Milner, Stephen J Crocker
Astrocytes perform critical homeostatic physiological functions in the central nervous system (CNS) and are robustly responsive to injury, inflammation, or infection. We hypothesized that the components of the extracellular matrix (ECM), which are known to vary during development and in response to disease, determine astrocytic responses to injury and inflammation. We examined the response of primary astrocyte cultures grown on different ECM proteins to a mechanical wound (i.e., scratch). ECM substrates selected were laminin (Ln), vitronectin (Vn), fibronectin (Fn) or Tenascin C (TnC)...
July 23, 2015: Neuroscience Letters
Richard P Tucker, Ruth Chiquet-Ehrismann
This review summarizes the experimental evidence of tenascin-C/integrin interactions, emphasizing the identification of integrin binding sites and the effects of specific interactions on cell behavior. At least four integrins appear to bind to the third fibronectin-type 3 domain of tenascin-C: α9β1, αVβ3, α8β1 and αVβ6. The α9β1 integrin recognizes a highly conserved IDG motif in this domain, while the others recognize an RGD motif. There is also significant evidence that the collagen receptor α2β1 can bind to tenascin-C, but the interacting site is unknown...
August 2015: International Journal of Biochemistry & Cell Biology
Yunhong Nong, Lang Bai, Hong Tang
Tenascin-C (TNC) is an extracellular matrix glycoprotein, which is usually highly expressed in embryonic tissues and tumor tissues, but is not expressed or just lowly expressed in mature tissues. TNC is involved in various complex signaling pathways during tumor metastasis, especially through modulating FAK, RhoA, Wnt and Notch pathways by interacting with syndecan-4, integrin α5β1, matrix metalloproteinases (MMPs) and vascular endothelial growth factor (VEGF). As a result, TNC affects epithelial mesenchymal transition, tumor cell adhesion, proliferation and angiogenesis, which eventually enhances the invasion and metastasis ability of many tumors...
February 2015: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
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