Sulforaphane
Sulforaphane is an organosulfur compound that exhibits anticancer, antidiabetic, and antimicrobial properties in experimental models. It is obtained from cruciferous vegetables such as broccoli, Brussels sprouts or cabbages. The enzyme myrosinase transforms glucoraphanin, a glucosinolate, into sulforaphane upon damage to the plant (such as from chewing). Young sprouts of broccoli and cauliflower are particularly rich in glucoraphanin.
Occurrence and isolation
Sulforaphane was identified in broccoli sprouts, which, of the cruciferous vegetables, have the highest concentration of sulforaphane.[1] It is also found in Brussels sprouts, cabbage, cauliflower, bok choy, kale, collards, Chinese broccoli, broccoli raab, kohlrabi, mustard, turnip, radish, arugula, and watercress.
Possible medicinal properties
Consumption of broccoli sprouts has shown to be potentially effective at inhibiting Helicobacter pylori growth,[2][3] with sulforaphane being at least one of the active agents.[4][5]
Sulforaphane and dietary consumption of cruciferous vegetables are known to affect the action of drug-metabolizing enzymes in vitro and in preliminary human studies.[6] Although no side effects or direct drug interactions have been reported as of 2008, people taking prescription drugs are advised to consult a doctor before taking sulforaphane or broccoli-sprout extracts.
The possible anticancer activity of sulforaphane may be related to the induction of phase-II enzymes of xenobiotic transformation (such as quinone reductase and glutathione S-transferase), and enhancing the transcription of tumor suppressor proteins, possibly via inhibitory effects on histone deacetylase.
Sulforaphane and diindolylmethane (another compound from Brassica vegetables) inhibit cancer growth in vitro and in experimental animals.[7] Sulforaphane downregulated the Wnt/beta-catenin self-renewal pathway in breast cancer stem cells.[8]
When applied topically, sulforaphane may protect skin against UV radiation damage, and thus potentially against cancer.[9] Sulforaphane may inhibit histone deacetylase (HDAC) activity.[10][11]
Preliminary experiments indicate sulforaphane may protect the heart from vascular inflammation and atherosclerosis.[12]
Clinical trials
Sulforaphane is in numerous clinical trials[13] including a phase II trial for prostate cancer.[14]
See also
References
- ^ Zhang Y, Talalay P, Cho CG, Posner GH (March 1992). "A major inducer of anticarcinogenic protective enzymes from broccoli: isolation and elucidation of structure". Proc. Natl. Acad. Sci. U.S.A. 89 (6): 2399–2403. doi:10.1073/pnas.89.6.2399. PMC 48665. PMID 1549603. http://www.pnas.org/cgi/pmidlookup?view=long&pmid=1549603.
- ^ "Baby broccoli 'controls gut bug'". BBC News Online. 6 April 2009. http://news.bbc.co.uk/1/hi/health/7981095.stm. Retrieved 6 April 2009.
- ^ Galan MV, Kishan AA, Silverman AL (August 2004). "Oral broccoli sprouts for the treatment of Helicobacter pylori infection: a preliminary report". Dig Dis Sci. 49 (7–8): 1088–1090. doi:10.1023/B:DDAS.0000037792.04787.8a. PMID 15387326.
- ^ Fahey JW, Haristoy X, Dolan PM et al. (May 2002). "Sulforaphane inhibits extracellular, intracellular, and antibiotic-resistant strains of Helicobacter pylori and prevents benzo[apyrene-induced stomach tumors"]. Proc. Natl. Acad. Sci. U.S.A. 99 (11): 7610–7615. doi:10.1073/pnas.112203099. PMC 124299. PMID 12032331. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=124299.
- ^ A. Yanaka, J. W. Fahey, A. Fukumoto, M. Nakayama, S. Inoue, S. Zhang, M. Tauchi, H. Suzuki, I. Hyodo, M. Yamamoto (April 2009). "Dietary Sulforaphane-Rich Broccoli Sprouts Reduce Colonization and Attenuate Gastritis in Helicobacter pylori–Infected Mice and Humans". Cancer Prev. Res. 2 (4): 353–360. doi:10.1158/1940-6207.CAPR-08-0192. PMID 19349290.
- ^ Kall MA, Vang O, Clausen J (March 1997). "Effects of dietary broccoli on human drug metabolising activity". Cancer Lett. 114 (1–2): 169–170. doi:10.1016/S0304-3835(97)04652-1. PMID 9103281.
- ^ Li et al. (May 2010). "Sulforaphane, a dietary component of broccoli/broccoli sprouts, inhibits breast cancer stem cells". Clinical Cancer Research 16 (9): 2580–2590. doi:10.1158/1078-0432.CCR-09-2937. PMC 2862133. PMID 20388854. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2862133.
- ^ Li et al. (2010). "Sulforaphane, a dietary component of broccoli/broccoli sprouts, inhibits breast cancer stem cells". Clinical Cancer Research 16 (9): 2580–2590. doi:10.1158/1078-0432.CCR-09-2937. PMC 2862133. PMID 20388854. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2862133.
- ^ Talalay P, Fahey JW, Healy ZR et al. (October 2007). "Sulforaphane mobilizes cellular defenses that protect skin against damage by UV radiation". Proc. Natl. Acad. Sci. U.S.A. 104 (44): 17500–17505. doi:10.1073/pnas.0708710104. PMC 2077285. PMID 17956979. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2077285.
- ^ Dashwood RH, Ho E (October 2007). "Dietary histone deacetylase inhibitors: from cells to mice to man". Semin. Cancer Biol. 17 (5): 363–369. doi:10.1016/j.semcancer.2007.04.001. PMC 2737738. PMID 17555985. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2737738.
- ^ "Synergistic activity of Sulforaphane (Broccozym) and Parthenolide (Butterzym) abolishes cancer stem cell characteristics.". 8 Nov 2010. http://www.herbalzym.com/2010/11/synergistic-activity-of-sulforaphane-broccozym-and-parthenolide-butterzym-abolishes-cancer-stem-cell-characteristics/.
- ^ "Research reveals a broccoli boost for arteries". 4 Sep 2009. http://www3.imperial.ac.uk/newsandeventspggrp/imperialcollege/newssummary/news_4-9-2009-15-8-42.
- ^ http://clinicaltrials.gov/ct2/results?term=Sulforaphane
- ^ "The Effects of Sulforaphane in Patients With Biochemical Recurrence of Prostate Cancer". http://clinicaltrials.gov/ct2/show/NCT01228084.