Abstract
Novel thiazolidinedione derivatives of the potent antioxidant, α-lipoic (thioctic, 1,2-dithiolane) acid, were prepared. The prototype N-(2-{4-[2,4-dioxo(1,3-thiazolidin-5-yl)methyl]phenoxy}ethyl)-5-(1,2-dithiolan-3-yl)-N-methylpentanamide (designated BP-1003), and dithioester derivatives thereof were shown to be potent activators of peroxisome proliferator-activated receptor gamma (PPARγ) (EC50 range 15–101 nM) and modest activators of PPARα (EC50 5 μM). Both the relatively hydrophobic dithiolane prototype, BP-1003, and its water-soluble dithioglycinate derivative, BP-1017, were shown to inhibit the proliferation of human keratinocytes and suppress the production of interleukin-2 by human peripheral lymphocytes to a greater extent than the antidiabetic thiazolidinedione, rosiglitazone. Both oral and topical administration of BP-1017 showed significant antiinflammatory effects in the oxazolone-sensitized mouse model of allergic contact dermatitis (ACD). These findings suggest that water-soluble lipoic acid-based thiazolidinediones may be efficacious as oral and topical agents for treating inflammatory skin conditions such as contact dermatitis, atopic dermatitis, and psoriasis.
Abbreviations
- ACD:
-
Allergic contact dermatitis
- ATCC:
-
American Type Culture Collection
- FRET:
-
Fluorescence resonance transactivation
- LBD:
-
Ligand binding domain
- LDH:
-
Lactate dehydrogenase
- PBMC:
-
Peripheral blood mononuclear cells
- PHA:
-
Phytohemagglutinin
- PPARγ:
-
Peroxisome proliferator-activated receptor-gamma
- TZD:
-
Thiazolidinedione
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Acknowledgements
This work was supported by NIH grant 2R42AR44767-02A2 (Bethesda Pharmaceuticals), grants from Bethesda Pharmaceuticals, Inc. (M.V., A.C.), and a Joint Venture grant between Bethesda Pharmaceuticals and the California State University Program for Education and Research in Biotechnology (S.B.).
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Venkatraman, M.S., Chittiboyina, A., Meingassner, J. et al. α-Lipoic acid-based PPARγ agonists for treating inflammatory skin diseases. Arch Dermatol Res 296, 97–104 (2004). https://doi.org/10.1007/s00403-004-0480-5
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DOI: https://doi.org/10.1007/s00403-004-0480-5