Abstract Title:

In Vitro Study of a Liposomal Curcumin Formulation (Lipocurc™): Toxicity and Biological Activity in Synovial Fibroblasts and Macrophages.

Abstract Source:

In Vivo. 2016 07-08;30(4):413-419. PMID: 27381602

Abstract Author(s):

Burkhard Kloesch, Lukas Gober, Silvia Loebsch, Brigitta Vcelar, Lawrence Helson, Guenter Steiner

Article Affiliation:

Burkhard Kloesch

Abstract:

BACKGROUND/AIM: The polyphenol curcumin is produced in the rhizome of Curcuma longa and exhibits potent anti-inflammatory, antioxidant, and chemopreventive activities. Due to the fact that curcumin is poorly soluble in water, many delivery systems have been developed to improve its solubility and bioavailability achieving optimum therapeutic application. In this study, we evaluated the biological effects of a liposomal curcumin formulation (Lipocurc™) on human synovial fibroblasts (SW982) and mouse macrophages (RAW264).

MATERIAL AND METHODS: Cellular uptake of liposomes was studied using calcein-loaded liposomes. Effects of Lipocurc™ on cell viability and proliferation were determined with Celltox green cytotoxicity assay and 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide (XTT) assay, respectively. To induce cytokine/chemokine expression, the cells were stimulated with interleukin (IL)1β or lipopolysaccharide (LPS). The release of IL6, IL8, and tumor necrosis factor-alpha (TNFα) was quantified by enzyme-linked immunosorbent assay (ELISA).

RESULTS: Data showed that the liposomal curcumin formulation Lipocurc™ was significantly less toxic to synovial fibroblasts and macrophages compared to non-encapsulated, free curcumin. Furthermore, Lipocurc™ effectively reduced pro-inflammatory cytokine/chemokine expression in synovial fibroblasts as well as in macrophages without affecting cell viability, suggesting that this curcumin nanoformulation might be a promising tool for the treatment of inflammatory diseases.

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