Collagen Matrices
Mostrando 1-12 de 71 artigos, teses e dissertações.
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1. Acellular human glans extracellular matrix as a scaffold for tissue engineering: in vitro cell support and biocompatibility
ABSTRACT Objectives: Diseases of the genitourinary tract can lead to significant damage. Current reconstructive techniques are limited by tissue availability and compatibility. This study aims to assess if the decellularized human glans can be used as a biomaterial for penile reconstruction. Materials and Methods: Samples of the glans matrices were descell
Int. braz j urol.. Publicado em: 2015-10
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2. Integration of collagen matrices into the urethra when implanted as onlay graft
Objective To assess the integration of decellularized heterologous collagen matrices into the urethra, when implanted with no cells or when seeded with autologous smooth muscle cells. Materials and Methods Eighteen New Zealand rabbits were randomly assigned to two groups: Group I (n = 9) - animals undergoing urethral segment resection with interposition o
Int. braz j urol.. Publicado em: 2013-06
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3. Mycobacterial laminin-binding histone-like protein mediates collagen-dependent cytoadherence
When grown in the presence of exogenous collagen I, Mycobacterium bovis BCG was shown to form clumps. Scanning electron microscopy examination of these clumps revealed the presence of collagen fibres cross-linking the bacilli. Since collagen is a major constituent of the eukaryotic extracellular matrices, we assayed BCG cytoadherence in the presence of exoge
Mem. Inst. Oswaldo Cruz. Publicado em: 2012-12
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4. Estudo comparativo da biocompatibilidade in vivo de matrizes acelulares de pericárdio bovino e porcino / In vivo biocompatibility study of acellular bovine and porcine pericardium matrices
Acellular matrices are used in tissue engineering for reconstruction or replacement of damaged tissues .In this study acellular matrices were developed using porcine pericardium and bovine pericardium, which contain a large quantity of type I collagen, using an alkaline hydrolysis treatment at the times of 12 hours and 24 hours. The matrices were developed t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/02/2011
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5. Porous biodegradable polyurethane nanocomposites: preparation, characterization, and biocompatibility tests
A porous biodegradable polyurethane nanocomposite based on poly(caprolactone) (PCL) and nanocomponents derived from montmorillonite (Cloisite®30B) was synthesized and tested to produce information regarding its potential use as a scaffold for tissue engineering. Structural and morphological characteristics of this nanocomposite were studied by infrared spec
Materials Research. Publicado em: 2010-06
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6. Porcine skin as a source of biodegradable matrices: alkaline treatment and glutaraldehyde crosslinking
In this work, the modifications promoted by alkaline hydrolysis and glutaraldehyde (GA) crosslinking on type I collagen found in porcine skin have been studied. Collagen matrices were obtained from the alkaline hydrolysis of porcine skin, with subsequent GA crosslinking in different concentrations and reaction times. The elastin content determination showed
Polímeros. Publicado em: 07/05/2010
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7. Modulation of extracellular matrix by nutritional hepatotrophic factors in thioacetamide-induced liver cirrhosis in the rat
Nutritional substances associated to some hormones enhance liver regeneration when injected intraperitoneally, being denominated hepatotrophic factors (HF). Here we verified if a solution of HF (glucose, vitamins, salts, amino acids, glucagon, insulin, and triiodothyronine) can revert liver cirrhosis and how some extracellular matrices are affected. Cirrhosi
Brazilian Journal of Medical and Biological Research. Publicado em: 25/09/2009
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8. Mineralização in vitro de matrizes colagênicas derivadas de tendões calcâneos bovinos e de avestruz / In vitro mineralization of anionic collagen scaffolds prepared from bovine and ostrich calcaneous tendons
One of greatest challenges of modern orthopedics is to restore bone tissue that has been lost due to sickness or accident. Searching for substitutes for grafts, biomaterials have been commonly used for recovery of bone tissue. Between different types of biomaterials, several are based on collagen. In addition to have important role in tissue structure, colla
Publicado em: 2009
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9. Mineralização in vitro de matrizes de colágeno aniônico derivadas de tecidos biológicos / In vitro mineralization of anionic collagen matrices
The reconstruction of osseous defects is still a problem that affects millions of people and medicine tries to solve it. One alternative to solve these problems has been the development of biomaterials that can be used as inductors in the osseous repair process. Collagen is a natural polymer able to promote healing and bone regeneration, and among hydroxyapa
Publicado em: 2008
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10. Avaliação de matrizes tridimensionais colagênicas como carreadores celulares para a bioengenharia óssea / Evaluation of three-dimensional collagenic matrices as cellular scaffolds to bone bioengineering
The therapy of bone defects constitutes one of the great challenges of the medicine and dentistry. Although autogenous is considered "gold standart", presents limitations as the necessity of second surgical site, limitation of bone availability and lack of previsibility. Tissue bioengineering appeared as a promising treatment for critical bone defects conjug
Publicado em: 2008
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11. Three-dimensional implants of polyanionic collagen in bone defects produced in the femur of ovariectomized rats / Implantes tridimensionais de colageno polianionico em falhas osseas produzidas no femur de ratas ovariectomizadas
There has been recent interest in the development of biomaterials that can be used as replacement of bone tissue or that act as inducer of the healing process in the case of bone fractures or defects. Biomaterials consisting of three-dimensional extracellular matrix elements (aECM) composed of collagen/elastin have the advantage that their properties can be
Publicado em: 2006
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12. Avaliação "in vitro" dos processos de proliferação e diferenciação de celulas osteoblasticas e a mineralização sobre matrizes anionicas de colageno para reparo osseo
Collagen has been extensively described as an important material in bone tissue engineering due to its biocompatibility, biodegradability, low antigenicity, and high tensile strength. However, collagen scaffolds in their pure form have some drawbacks and improvements in its physical, chemical and biological properties are necessary to overcome those inadequa
Publicado em: 2005