Abstract Title:

Synergistic effect of combination of phenethyl isothiocyanate and sulforaphane or curcumin and sulforaphane in the inhibition of inflammation.

Abstract Source:

Pharm Res. 2009 Jan;26(1):224-31. Epub 2008 Oct 8. PMID: 18841446

Abstract Author(s):

Ka Lung Cheung, Tin Oo Khor, Ah-Ng Kong

Article Affiliation:

Graduate Program in Pharmaceutical Science, Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA.

Abstract:

PURPOSE: Accumulating evidence from epidemiologic and clinical studies indicates that chronic inflammatory disorders harbor an increased risk of cancer development. Curcumin (CUR) has been strongly linked to the anti-inflammatory effect. On the other hand, isothiocyanates such as sulforaphane (SFN) and phenethyl isothiocyanate (PEITC) are strong phase-II detoxifying/antioxidant enzymes inducer. Therefore it is interesting to see if combination of these drugs can inhibit inflammation with higher combined efficacies. METHODS: We used nitric oxide (NO) assay to assess the synergism of the different combinations of CUR, SFN and PEITC. The inflammatory markers, e.g. iNOS, COX-2, prostaglandin E2 (PGE2), tumor necrosis factor (TNF) and interleukin-1 (IL-1) levels were determined using RT-PCR, Western blot and ELISA assays. RESULTS: We report that combination of PEITC + SFN or CUR + SFN has a synergistic effect in down-regulating inflammation markers like TNF, IL-1, NO, PGE2. The synergism is probably due to the synergistic induction of phase II/antioxidant enzymes including heme-oxygenase1 (HO-1) and NAD(P)H:quinone oxidoreductase 1 (NQO-1). CONCLUSIONS: Our data suggest that CUR + SFN and PEITC + SFN combinations could be more effective than used alone in preventing inflammation and possibly its associated diseases including cancer.

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