Hyaluronan Promotes the Suppressive Cutting Edge: High Molecular Weight

Local injection of high-molecular hyaluronan promotes wound healing in old rats by increasing angiogenesis

Impaired angiogenesis contributes to delayed wound healing in aging. Hyaluronan (HA) has a close relationship with angiogenesis and wound healing. However, HA content decreases with age. In this study, we used high molecular weight HA (HMW-HA) (1650 kDa), and investigated its effects on wound healing in old rats by local injection. We found that HMW-HA significantly increases proliferation, mig...

Hyaluronan promotes tumor lymphangiogenesis and intralymphantic tumor growth in xenografts.

Hyaluronan (HA), a high molecular weight glycosaminoglycan in the extracellular matrix, has been implicated in the promotion of malignant phenotypes, including tumor angiogenesis. However, little is known about the effect of HA on tumor-associated lymphangiogenesis. In this study, mouse hepatocellular carcinoma Hca-F cells combined with or without HA were injected subcutaneously into C3H/Hej mi...

Preparation of Hyaluronan from Uterine Cervix and Estimation of Its Molecular Weight Uterine cervices

sists mainly of collagen, hyaluronan, and proteoglycan. During gestation, it must close firmly to retain the fetus in the uterus. It undergoes ripening and dilatation at term, forming a parturient canal so that delivery can occur. During ripening, there are increases of collagen degradation in connective tissues, and proteoheparan sulfate, while decorin decreases. Inflammatory mediators, such a...

TLR4 through IFN-b Promotes Low Molecular Mass Hyaluronan-Induced Neutrophil Apoptosis

Hyaluronan molecular weight is controlled by UDP-N-acetylglucosamine concentration in Streptococcus zooepidemicus.

The molecular weight of hyaluronan is important for its rheological and biological function. The molecular mechanisms underlying chain termination and hence molecular weight control remain poorly understood, not only for hyaluronan synthases but also for other beta-polysaccharide synthases, e.g. cellulose, chitin, and 1,3-betaglucan synthases. In this work, we manipulated metabolite concentrati...