Search results for "collage"

Ergebnisse einer S2k-Konsensuskonferenz der Deutschen Gesellschaft für Gastroenterologie, Verdauungs- und Stoffwechselerkrankungen (DGVS) gemeinsam m…

2014

Perlecan Maintains the Integrity of Cartilage and Some Basement Membranes

1999

Perlecan is a heparan sulfate proteoglycan that is expressed in all basement membranes (BMs), in cartilage, and several other mesenchymal tissues during development. Perlecan binds growth factors and interacts with various extracellular matrix proteins and cell adhesion molecules. Homozygous mice with a null mutation in the perlecan gene exhibit normal formation of BMs. However, BMs deteriorate in regions with increased mechanical stress such as the contracting myocardium and the expanding brain vesicles showing that perlecan is crucial for maintaining BM integrity. As a consequence, small clefts are formed in the cardiac muscle leading to blood leakage into the pericardial cavity and an ar…

Evaluation of a novel biomarker of type XXVIII collagen formation, PRO-C28, in samples from cancer and heart failure with preserved ejection fraction…

2020

Increased turnover of extracellular matrix proteins is seen in many different diseases and is an underlying and driving feature of pathogenesis. An increased ratio of formation over degradation of extracellular matrix proteins, such as collagens, leads to accumulation of proteins in the tissues, ultimately impairing organ function. Understanding how this balance is regulated is key to providing deeper insight into high extracellular matrix turnover diseases. Type XXVIII collagen is a novel collagen with limited information available in relation to expression, tissue prevalence and clinical implication. We generated a novel, technically robust ELISA to measure a C-terminal fragment of type X…

Unusual basement layer in the midgut of gammaridean Niphargus virei Chevreux (Crustacea, Amphipoda).

1988

The basement membrane of the midgut and posterior caeca epithelium in the gammaridean amphipod Niphargus virei Chevreux, 1896 is made of an unusual structure. This basal lamina, properly called “basal layer”, shows a dense sheet formed by a system of dense hexagonal plates connected by thin filaments. Histochemical studies and enzymatic reactions lead to the conclusion that these structures are proteinaceous, without collagenous protein, and embedded in a neutral polysaccharide matrix. The possible mechanical significance of these mesenteric structures is discussed.

Histochemical and electron microscopic analysis of spiculogenesis in the demosponge Suberites domuncula.

2006

The skeleton of demosponges is built of spicules consisting of biosilica. Using the primmorph system from Suberites domuncula, we demonstrate that silicatein, the biosilica-synthesizing enzyme, and silicase, the catabolic enzyme, are colocalized at the surface of growing spicules as well as in the axial filament located in the axial canal. It is assumed that these two enzymes are responsible for the deposition of biosilica. In search of additional potential structural molecules that might guide the mineralization process during spiculogenesis to species-specific spicules, electron microscopic studies with antibodies against galectin and silicatein were performed. These studies showed that …

Influence of Extracellular Matrix on the Lipogenesis of Cultured White Fat Cells.

1998

Collagenase digests from subcutaneous fat tissue of new born rats were cultured on different types of collagen gel containing 50% type I collagen, on fibronectin (Fn) or on laminin (Lm). On day 6, 17% of cells on a plastic substratum differentiated and had multilocular or unilocular cytoplasmic lipid droplets (CLDs). Cells on each type of collagen and on Lm had more CLDs than those on a plastic substratum. The extent of lipogenesis showed the following decreasing order: cells on Lm (80%), on type IV+I collagen (70%), on type I collagen (52%), on type III+I collagen (36%), on type II+I collagen (32%). On day 14, most cells on Lm became unilocular fat cells. Cells on Fn showed delipidation an…

Generalized countable iterated function systems

2011

One of the most common and most general way to generate fractals is by using iterated function systems which consists of a finite or infinitely many maps. Generalized countable iterated function systems (GCIFS) are a generalization of countable iterated function systems by considering contractions from X ? X into X instead of contractions on the metric space X to itself, where (X, d) is a compact metric space. If all contractions of a GCIFS are Lipschitz with respect to a parameter and the supremum of the Lipschitz constants is finite, then the associated attractor depends continuously on the respective parameter.

Galvanic Deposition of Hydroxyapatite/Chitosan/Collagen Coatings on 304 Stainless Steel

2021

The galvanic deposition method was used to deposit Hydroxyapatite/Chitosan/Collagen coatings on 304 stainless steel. Galvanic deposition is an alternative and valid way to fabricate bio-coatings with high biocompatibility and good anticorrosion properties. Physical-chemical characterizations were carried out to investigate chemical composition and morphology of the samples. Coatings consist of a mixture of calcium phosphate (Brushite and Hydroxyapatite) with chitosan and collagen. Corrosion tests were performed in the simulated body fluid (SBF) after different aging times. Results show that, in comparison with bare 304 stainless steel, coating shifts corrosion potential to anodic values and…

Allergen-specific immune deviation from a T H2 to a T H1 response induced by dendritic cells and collagen type I

1999

Background: Atopy and IgE production are associated with enhanced allergen-specific TH2 responses. Therefore a causative treatment may result from the deviation of this T H2dominated immune response toward a TH1 response. Objective: This study was carried out to analyze whether dendritic cells, the most potent antigen-presenting cells that are also known to induce antigen-specific T H1 responses, are suitable for therapy of atopic diseases by shifting the allergen-specific TH2 response toward a TH1 response. Methods: Monocyte-derived dendritic cells were used to present allergens in vitro to autologous CD4 + T cells of allergic persons. Because collagen type I activates dendritic cells and …

Creating images / Feigning objects. Dialogues between the artistic projects of Isidro Ferrer, Sean Mackaoui & Chema Mado

2013

[EN] As a tribute to the opening of a new exhibition space, the present text traces the common thread that links together three contemporary artists, active in the Spanish context —Chema Madoz, Sean Mackaoui and Isidro Ferrer— tightly linked all of them to visual poetry, from photography, collage and objects. Close existing connections between images and texts, according to the double direction which, on the one hand, creatively relate texts with images (hypotyposis) are also studied and, on the other hand, descriptively linked images with texts (ekphrasis). Both strategies are two fundamental ways for the explanation and interdisciplinary interpretation from the current aesthetics, referri…