Hyaluronan is being used increasingly as a component of artificial matrices and in bioengineering for tissue scaffolding. The length of hyaluronan polymer chains is now recognized as informational, involving a wide variety of size-specific functions. Inadvertent scission of hyaluronan can occur during the process of preparation. On the other hand, certain size-specific hyaluronan fragments may ...

Hepatic stellate cells (HSC) and endothelial cells of the liver sinusoids synthesize and degrade hyaluronan, respectively. The roles of these cell types in the biosynthesis and degradation of hyaluronan were studied during regeneration following partial hepatectomy. Pure cultures of HSC and liver endothelial cells (LEC) were obtained from regenerating liver at different stages using a Nycodenz ...

We previously reported that the chlorella virus PBCV-1 genome encodes an authentic, membrane-associated glycosyltransferase, hyaluronan synthase (HAS). Hyaluronan, a linear polysaccharide chain composed of alternating beta1,4-glucuronic acid and beta1, 3-N-acetylglucosamine groups, is present in vertebrates as well as a few pathogenic bacteria. Studies of infected cells show that the transcript...

CD44 is a widely expressed cell adhesion molecule that binds the extracellular matrix component, hyaluronan, in a tightly regulated manner. Previous studies have shown that the CD44-hyaluronan interaction is affected by changes in the glycosylation state of CD44. In this study, we take advantage of several well-characterized murine L cell mutants defective in heparan sulfate synthesis (gro2C ce...

Background. Biological therapeutics such as adipose-derived mesenchymal stem cell (MSC) therapy are gaining acceptance for knee-osteoarthritis (OA) treatment. Reports of OA-patients show reductions in cartilage defects and regeneration of hyaline-like-cartilage with MSC-therapy. Suspending MSCs in hyaluronan commonly occurs in animals and humans, usually without supporting data. Objective. To e...

Pulmonary inflammation and fibrosis are characterized by increased turnover and production of the extracellular matrix as well as an impairment of lung fibrinolytic activity. Although fragments of the extracellular matrix component hyaluronan induce macrophage production of inflammatory mediators, the effect of hyaluronan on the fibrinolytic mediators plasminogen activator inhibitor (PAI)-1 and...

The concentration and histological distribution of hyaluronan, a tumor promoting extracellular matrix polysaccharide, and the activity of hyaluronidase, a potential source of angiogenic hyaluronan oligosaccharides, were analyzed in malignant epithelial (n 24), borderline (n 8), benign epithelial (n 20), functional cyst (n 21), and normal (n 5) tissue samples of human ovary. Hyaluronan concentra...

Background—Hyaluronan is thought to mediate neointimal hyperplasia but also vasoprotection as an integral component of the endothelial glycocalyx. The present study addressed for the first time the effects of long-term pharmacological inhibition of hyaluronan synthesis on vascular function and atherosclerosis. Methods and Results—Four-week-old apolipoprotein E– deficient mice on a Western diet ...

Brinck, J. 2000. The Expression and Regulation of Hyaluronan Synthases and Their Role in Glycosaminoglycan Synthesis. Acta Universitatis Upsaliensis. Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine 955. 63 pp. Uppsala. ISBN 91-554-4806-2. The glycosaminoglycan hyaluronan is an essential component of the extracellular matrix in all higher organisms, affecting cellul...

Ducale, Ashley E., Susan I. Ward, Tracey Dechert, and Dorne R. Yager. Regulation of hyaluronan synthase-2 expression in human intestinal mesenchymal cells: mechanisms of interleukin-1 -mediated induction. Am J Physiol Gastrointest Liver Physiol 289: G462–G470, 2005. First published January 27, 2005; doi:10.1152/ajpgi.00494.2004.—Elevated levels of hyaluronan are associated with numerous inflamm...