Search results for " adhesion"

Anchorage of Candida albicans Ssr1 to the cell wall, and transcript profiling of the null mutant.

2005

Incorporation into the wall of Candida albicans Ssr1, a GPI-dependent protein, was investigated by construction of different truncated genes for which the three potential omega sites (S199, S215 and G216) and the corresponding omega+1 and omega+2 were eliminated or modified. Cells of the C. albicans ssr1Delta mutant were transformed with pADH-pl harboring the truncated versions of CaSSR1, pADH-DeltaCaSSR1t(217-234) (lacking a C-terminal hydrophobic stretch of 18 aa including the putative omega+2 and omega+1, omega+2 of S215 and G216) or pADH-DeltaCaSSR1t(199-201) (lacking three serine residues), and their walls were analyzed for the protein. Results suggested that the three serine residues …

Anti-oxidant and anti-inflammatory properties of betalains from Cactus Pear

2004

Anti-oxidant and anti-inflammatory properties of Betalains from Cactus Pear. C. Gentile1, A. Marconi1, M. A. Livrea2, G. Uzan1, P. D’Alessio1. 1 Inserm U602, Paris, France. 2 Dip. Farmacochimico, Tossicologico e Biologico, Università Palermo, Italy. Betalains of phytochemical origin, known as potent radical-scavengers in chemical and biological systems, have been tested in a model of inflammation. New phytochemicals are continuously inspected for potential pharmacological applications. The red betanin and the yellow indicaxanthin have recently been isolated and characterized from Cactus Pear. Reactive Oxygen Species may be toxic or display a regulatory character. During the inflammation rea…

Multiple Sialyl Lewisx N-Glycopeptides: Effective Ligands for E-Selectin

1996

Evolution of Cell Adhesion Systems: Evidence for Arg-Gly-Asp-Mediated Adhesion in the Protozoan Neoparamoeba aestuarina

1995

Developmental processes in multicellular organisms require structural elements, such as adhesion molecules, to stabilize cells at functional positions. In vertebrates, a series of extracellular matrix proteins, e.g. fibronectin and laminin, are involved in cell adhesion. These proteins contain Arg-Gly-Asp [RGD] at their binding sites. Here we show that at concentrations above 2 mM the peptide GRGDSPK, comprising the tripeptide RGD (Arg-Gly-Asp), prevents the adhesiveness of cells of the marine amoeba Neoparamoeba aestuarina. In addition, elevated levels of GRGDSPK cause cells to alter their shapes from those with digitiform subpseudopodia to rounded cells with small lobed pseudopodia. These…

Submicron Scale-Structured Hydrophilic Titanium Surfaces Promote Early Osteogenic Gene Response for Cell Adhesion and Cell Differentiation

2011

cid_339 166..175 ABSTRACT Background and Purpose: Titanium (Ti) surface roughness and surface hydrophilicity are key factors to regulate osteogenic cell responses during dental implant healing. In detail, specific integrin-mediated interactions with the extracellular environment trigger relevant osteogenic cell responses like differentiation and matrix synthesis via transcriptions factors. Aim of this study was to monitor surface-dependent osteogenic cell adhesion dynamics, proliferation, and specific osteo- genic cell differentiation over a period of 7 days. Materials and Methods: Ti disks were manufactured to present smooth pretreatment (PT) surfaces and rough sandblasted/ acid-etched (SL…

Mechanisms of endothelial cell activation by endocannabinoid 2-arachidonoylglycerol

2020

Abstract Background Endothelial dysfunction promotes atherogenesis, vascular inflammation, and thrombus formation. Reendothelialization after angioplasty is required in order to restore vascular function and to prevent stent thrombosis. The endocannabinoid (eCB) 2-arachidonoylglycerol (2-AG) is a known modulator of inflammation. Earlier studies have demonstrated the relevance of this endocannabinoid in human pathophysiology during coronary artery disease and in murine experimental atherogenesis. However, evidence on the impact of 2-AG on endothelial cell function remains scarce. Methods Endothelial repair was studied in two treatment groups of wildtype mice following electrical denudation o…

Synthetic Glycopeptides from the E-Selectin Ligand 1 with Varied Sialyl Lewisx Structure as Cell-Adhesion Inhibitors of E-Selectin.

2007

The Origin of Metazoan Complexity: Porifera as Integrated Animals

2011

SYNOPSIS. Sponges [Porifera] are the phylogenetically oldest metazoan phylum still extant today; they share the closest relationship with the hypothetical common metazoan ancestor, the Urmetazoa. During the past 8 years cDNAs coding for proteins involved in cell-cell- and cell-tissue interaction have been cloned from sponges, primarily from Suberites domuncula and Geodia cydonium and their functions have been studied in vivo as well as in vitro. Also, characteristic elements of the extracellular matrix have been identified and cloned. Those data confirmed that all metazoan phyla originate from one ancestor, the Urmetazoa. The existence of cell adhesion molecules allowed the emergence of a c…

Endothelial cells stimulate osteogenic differentiation of mesenchymal stem cells on calcium phosphate scaffolds

2012

The interaction of mesenchymal stem cells (MSCs) with endothelium in vivo is significant for regenerative processes in organisms. To design concepts for tissue engineering for bone regeneration based on this interaction, the osteogenic differentiation of human bone marrow-derived MSCs in a co-culture with human dermal microvascular endothelial cells (HDMECs) was studied. The experiments were focussed on the regulation of MSCs in a co-culture with HDMECs on different calcium phosphate scaffolds. Alkaline phosphatase (ALP) activity and mRNA expression of various osteogenic markers increased significantly when cells were co-cultured on materials with calcium phosphate scaffolds compared to tis…

Virulent and nonvirulent Flavobacterium columnare colony morphologies: characterization of chondroitin AC lyase activity and adhesion to polystyrene

2011

Aims:  Colony morphology variants of fish pathogenic Flavobacterium columnare were studied to clarify the role of colony morphology change in the virulence of the bacterium. Typical rhizoid colony (Rz) variants are virulent and moderately adherent, nonrhizoid rough (R) colony variants are nonvirulent and highly adherent, and soft colony (S) variants are nonvirulent and poorly adherent. Methods and Results:  Chondroitin AC lyase activity, adhesion to polystyrene at different temperatures and after modification of bacterial surface, and lipopolysaccharide (LPS) profiles of the variants were studied. The chondroitinase activity was significantly higher in the virulent, rhizoid variants than in…