Hyaluronan oligosaccharides promote excisional wound healing through enhanced angiogenesis

Matrix Biology : Journal of the International Society for Matrix Biology
Feng GaoGuo Wei

Abstract

The biological roles of hyaluronan (HA) fragments in angiogenesis acceleration have been investigated recently. Studies have confirmed that oligosaccharides of HA (o-HA) are capable of stimulating neovascularization in vitro and promoting blood flow or angiogenesis in animal models. However, few laboratories have studied the function of o-HA as an exogenous treatment in injured tissue repair in vivo. It is thought that o-HA may lose its activities when used topically in vivo due to its small size, which may be absorbed quickly by the surrounding tissues. In this study, we prepared a special slow-releasing gel that contains a mixture of defined size of o-HA and studied the healing effects of o-HA by topical application to an acute wound model. We report that o-HA complex promotes the repair of tissue injury of a murine excisional dermal wound. The therapy by o-HA was compared with high molecular weight HA (HMW-HA) and the known angiogenesis stimulator, VEGF. At days 6 to 8 after treatment, significant differences were seen in wound closure rates between o-HA and control or HMW-HA groups, in which o-HA showed an increased wound recovery. Histological analysis revealed that increased neo-blood and lymph vessels were formed in woun...Continue Reading

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