QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Finley, J. W. Search for Related Content PubMed PubMed Citation Articles by Finley, J. W.

---

Article

The Retention and Distribution by Healthy Young Men of Stable Isotopes of Selenium Consumed as Selenite, Selenate or Hydroponically-Grown Broccoli Are Dependent on the Isotopic Form^{1, ,2}

United States Department of Agriculture, Agricultural Research Service, Grand Forks Human Nutrition Research Center, Grand Forks, ND 58202-9034

³To whom correspondence should be addressed at John W. Finley, Ph.D., USDA, ARS, GFHNRC, P.O. Box 9034, UND Station, Grand Forks, ND 58202-9034. Telephone: (701) 795-8366, FAX: (701) 795-8395, E-mail: jfinley{at}GFHNRC.ARS.USDA.gov

Twenty-seven healthy young men were randomly assigned to diets that supplied low (32.6 µg/d) or high (226.5 µg/d) levels of selenium for a 105-d study. After consuming the diets for 85 d, subjects were fed a test meal that contained ⁷⁴Se in the form of selenite or selenate and ⁸²Se incorporated into hydroponically-raised broccoli. Urine, fecal and blood samples were collected daily. Isotope absorption was not different (P > 0.05) for selenate and Se in broccoli; Se absorption from selenite was highly variable and was not included in statistical analyses. Significantly more isotope was absorbed by subjects fed the high Se diet (P = 0.015). Urinary isotope excretion was greater when selenate was fed than when broccoli was fed (P = 0.0001), and consequently more Se from broccoli (as compared to selenate) was retained (59.2 ± 2.4 and 36.4 ± 4.6% for Se in broccoli and selenate, respectively; P = 0.0001). Despite the higher retention, less isotope from broccoli than from selenate was present in the plasma. Plasma proteins separated by gel permeation chromatography showed that most of the isotopes were distributed between two medium molecular weight peaks. Less isotope was found in plasma proteins of subjects fed the high Se diet, but the form of Se had no effect on isotope distribution. These results show that dietary Se intake alters the retention of stable isotopes of Se and that humans retain and distribute Se from broccoli in a different manner than Se from inorganic salts.

KEY WORDS: • selenium • stable isotope • absorption • broccoli • humans

This article has been cited by other articles:

				J. W. FINLEY Proposed Criteria for Assessing the Efficacy of Cancer Reduction by Plant Foods Enriched in Carotenoids, Glucosinolates, Polyphenols and Selenocompounds Ann. Bot., June 1, 2005; 95(7): 1075 - 1096. [Abstract] [Full Text] [PDF]

				W. C. Hawkes, F. Z. Alkan, and L. Oehler Absorption, Distribution and Excretion of Selenium from Beef and Rice in Healthy North American Men J. Nutr., November 1, 2003; 133(11): 3434 - 3442. [Abstract] [Full Text] [PDF]

				J. W. Finley, C. D. Davis, and Y. Feng Selenium from High Selenium Broccoli Protects Rats from Colon Cancer J. Nutr., September 1, 2000; 130(9): 2384 - 2389. [Abstract] [Full Text]