title: Dietary and demographic correlates of serum beta-glucuronidase activity.
abstract: beta-glucuronidase, an acid hydrolase that deconjugates glucuronides, may increase cancer risk; however, little is known about factors associated with human beta -glucuronidase. Our objective was to examine whether dietary and demographic factors were associated with serum beta -glucuronidase activity. We conducted a cross-sectional study among 279 healthy men and women aged 20 to 40 yr. Diet, categorized by botanical families and nutrient intakes, was assessed from 3-day food records and a validated semiquantitative food frequency questionnaire. Demographic factors were directly measured or self-reported. Adjusted mean beta -glucuronidase activity across categories of exposure variables were calculated by multiple linear regression. Higher beta -glucuronidase activity was significantly associated with being male, older age (> or = 30 yr), non-Caucasian, overweight (> or = 25 kg/m(2)), and higher intakes of gamma-tocopherol. Conversely, lower beta -glucuronidase activity was significantly associated with higher intakes of calcium, iron, and magnesium. A suggestive decrease in beta -glucuronidase activity was observed for the botanical families Cruciferae, Rutaceae, Compositae, Roseaceae, and Umbelliferae, but tests for trend were not statistically significant. In conclusion, several dietary and nondietary factors were associated with beta -glucuronidase activity; however, confirmation of these associations are needed.
authors.affiliation: Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1024, USA.
authors.forename: Sonia S
authors.initials: SS
authors.lastname: Maruti
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.forename: Jyh-Lurn
authors.initials: JL
authors.lastname: Chang
authors.forename: Joann
authors.initials: J
authors.lastname: Prunty
authors.forename: Yvonne
authors.initials: Y
authors.lastname: Schwarz
authors.forename: Shuying S
authors.initials: SS
authors.lastname: Li
authors.forename: Irena B
authors.initials: IB
authors.lastname: King
authors.forename: John D
authors.initials: JD
authors.lastname: Potter
authors.forename: Johanna W
authors.initials: JW
authors.lastname: Lampe
mesh_terms: D000328:Adult; D000367:Age Factors; D001835:Body Weight; D002136:Calcium, Dietary / Q000008:administration & dosage; D003430:Cross-Sectional Studies; D004032:Diet; D015930:Diet Records; D005260:Female; D005638:Fruit; D005966:Glucuronidase / Q000097:blood*; D006801:Humans; D019266:Iron, Dietary / Q000008:administration & dosage; D016014:Linear Models; D008274:Magnesium / Q000008:administration & dosage; D008297:Male; D050177:Overweight; D044469:Racial Groups; D012737:Sex Factors; D011795:Surveys and Questionnaires; D014675:Vegetables; D024504:gamma-Tocopherol / Q000008:administration & dosage
chemical_list: D002136:Calcium, Dietary; D019266:Iron, Dietary; D024504:gamma-Tocopherol; D005966:Glucuronidase; D008274:Magnesium