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Journal of Virology, May 2003, p. 5499-5502, Vol. 77, No. 9
0022-538X/03/$08.00+0     DOI: 10.1128/JVI.77.9.5499-5502.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Inhibition of Protease-Resistant Prion Protein Accumulation In Vitro by Curcumin

Byron Caughey,* Lynne D. Raymond, Gregory J. Raymond, Laura Maxson, Jay Silveira, and Gerald S. Baron

Laboratory of Persistent Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rocky Mountain Laboratories, Hamilton, Montana 59840

Received 15 November 2002/ Accepted 3 February 2003

Inhibition of the accumulation of protease-resistant prion protein (PrP-res) is a prime strategy in the development of potential transmissible spongiform encephalopathy (TSE) therapeutics. Here we show that curcumin (diferoylmethane), a major component of the spice turmeric, potently inhibits PrP-res accumulation in scrapie agent-infected neuroblastoma cells (50% inhibitory concentration, ~10 nM) and partially inhibits the cell-free conversion of PrP to PrP-res. In vivo studies showed that dietary administration of curcumin had no significant effect on the onset of scrapie in hamsters. Nonetheless, other studies have shown that curcumin is nontoxic and can penetrate the brain, properties that give curcumin advantages over inhibitors previously identified as potential prophylactic and/or therapeutic anti-TSE compounds.

* Corresponding author. Mailing address: NIH Rocky Mountain Laboratories, 903 S. 4th St., Hamilton, MT 59840. Phone: (406) 363-9264. Fax: (406) 363-9286. E-mail: bcaughey{at}nih.gov.

Journal of Virology, May 2003, p. 5499-5502, Vol. 77, No. 9
0022-538X/03/$08.00+0     DOI: 10.1128/JVI.77.9.5499-5502.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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