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- W2079553301 abstract "Hyaluronate is a ubiquitous component of mammalian extracellular matrix. It influences numerous cellular processes and accumulates in fibrotic connective tissue disorders. Recently, hyaluronate catabolism has assumed additional importance because of the introduction into clinical practice of therapeutic procedures which deposit high concentrations of hyaluronate directly into tissues. Relatively little is known about the local metabolism, fate, or long-term effects of either endogenous or exogenous hyaluronate at deposition sites. A capacity for degrading hyaluronate within connective tissues, presumably by fibroblasts, has been inferred but remains controversial because direct proof that human fibroblasts endocytose and degrade hyaluronate has been lacking. In the present study, fibroblasts from normal and fibrotic skin were incubated with [3H]-hyaluronate. Binding and internalization of radiolabeled substrate were then measured: Binding assays revealed a saturable, dose-dependent increase in cell surface-associated [3H]-hyaluronate which was enhanced by pretreatment with hyaluronidase. Similar binding curves were obtained for all cells tested. All the cell lines internalized hyaluronate; however, fibroblasts in confluent cultures internalized 3.5- to 4.2-fold more radioactivity per cell than did fibroblasts from corresponding subconfluent cultures (p ≤ 0.002). Normal scar fibroblasts showed greater capacity for generating hyaluronate-derived partial degradation products. This work provides clear evidence that human cutaneous fibroblasts are capable of both binding and internalizing hyaluronate, possibly as a prerequisite for degradation." @default.
- W2079553301 created "2016-06-24" @default.
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- W2079553301 date "1992-02-01" @default.
- W2079553301 modified "2023-09-27" @default.
- W2079553301 title "Binding and Internalization of Hyaluronate by Human Cutaneous Fibroblasts" @default.
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- W2079553301 doi "https://doi.org/10.1016/s0934-8832(11)80100-9" @default.
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