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Abstract Title:

Randomized Crossover Trial Evaluating Detoxification of Tobacco Carcinogens by Broccoli Seed and Sprout Extract in Current Smokers.

Abstract Source:

Cancers (Basel). 2022 Apr 24 ;14(9). Epub 2022 Apr 24. PMID: 35565256

Abstract Author(s):

Julie E Bauman, Chiu-Hsieh Hsu, Sara Centuori, Jose Guillen-Rodriguez, Linda L Garland, Emily Ho, Megha Padi, Vignesh Bageerathan, Lisa Bengtson, Malgorzata Wojtowicz, Eva Szabo, H-H Sherry Chow

Article Affiliation:

Julie E Bauman


Consumption of cruciferous vegetables, rich in the isothiocyanate glucoraphanin, is associated with reduced risk of tobacco-related cancers. Sulforaphane, released by hydrolysis of glucoraphanin, potently induces cytoprotective phase II enzymes. Sulforaphane decreased the incidence of oral cancer in the 4NQO carcinogenesis model. In residents of Qidong, China, broccoli seed and sprout extracts (BSSE) increased detoxification of air pollutants benzene and acrolein, also found in tobacco smoke. This randomized, crossover trial evaluated detoxification of tobacco carcinogens by the BSSE Avmacolin otherwise healthy smokers. Participants were treated for 2 weeks with both low and higher-dose BSSE (148µmol vs. 296 µmol of glucoraphanin daily), separated by a 2-week washout, with randomization to low-high vs. high-low sequence. The primary endpoint was detoxification of benzene, measured by urinary excretion of its mercapturic acid, SPMA. Secondary endpoints included bioavailability, detoxification of acrolein and crotonaldehyde, modulation bygenotype, and toxicity. Forty-nine participants enrolled, including 26 (53%) females with median use of 20 cigarettes/day. Low and higher-dose BSSE showed a mean bioavailability of 11% and 10%, respectively. Higher-dose BSSE significantly upregulated urinary excretion of the mercapturic acids of benzene (= 0.04), acrolein (< 0.01), and crotonaldehyde (= 0.02), independent ofgenotype. Retention and compliance were high resulting in early study completion. In conclusion, BSSE significantly upregulated detoxification of the tobacco carcinogens benzene, acrolein, and crotonaldehyde in current tobacco smokers.

Study Type : Human Study

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