Abstract
The viscoelastic properties of four novel, low molecular weight hyaluronic acid derivatives were investigated and compared to the parent hyaluronic acid compound. Briefly, all derivatives were synthesized by first deacetylating the parent hyaluronic acid. One sample was left as such, while two others were reacytelated. The final compound, of particular interest for its anti-inflammatory properties, was butyrylated. The compounds were dissolved in phosphate buffer solution (PBS) and studied at a concentration of 5 mg/mL. Shear thinning behaviour was observed for all compounds, however, derivative samples had a lower viscosity than the parent compound at high shear rates. Viscoelastic properties were also observed to decrease as a result of the derivative preparation method. It is believed that these changes are primarily caused by a decrease in hyaluronic acid molecular weight. By increasing the concentration of the anti-inflammatory compound, it may be possible to modulate the viscoelastic properties to more closely resemble those of commercial viscosupplements. As a result, an anti-inflammatory derivative of hyaluronic acid may potentially improve upon existing viscosupplements used to treat patients who are susceptible to flare up.
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Support from the Canada Foundation for Innovation grant for rheometer purchase is acknowledged. Financial support from the Natural Sciences and Engineering Research Council of Canada, Discovery Grant, is gratefully acknowledged.
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Chernos, M., Grecov, D., Kwok, E. et al. Rheological study of hyaluronic acid derivatives. Biomed. Eng. Lett. 7, 17–24 (2017). https://doi.org/10.1007/s13534-017-0010-y
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DOI: https://doi.org/10.1007/s13534-017-0010-y