OBJECTIVE: To measure the association between dietary fiber intake and eleven hormones and peptides in postmenopausal breast cancer survivors. METHODS: Intake of fiber from food and supplements was measured two to three years after breast cancer diagnosis in 493 postmenopausal women from three western states. Concurrently, a fasting blood sample was obtained for assay of estrone, estradiol, free estradiol, testosterone, free testosterone, dehydroepiandrosterone sulfate, sex hormone-binding globulin (SHBG), leptin, C-peptide, insulin-like growth factor-1 (IGF1), and IGF-binding protein-3. Adjusted means of these hormones and peptides were calculated for categories of fiber intake. RESULTS: High intake of dietary fiber was significantly (P<or=0.05) associated with low serum levels of estradiol and free estradiol and with high serum levels of IGF1. The combination of high dietary fiber intake and use of fiber supplements was additionally associated with low serum levels of C-peptide. The magnitude of the difference in hormone/peptide values, comparing high fiber intake to low fiber intake, varied from 16 to 28%, and the associations were independent of multiple confounding variables. CONCLUSION: High fiber diets may be beneficial to postmenopausal breast cancer survivors due to fiber's favorable influence on sex hormones and peptides known to affect breast cancer prognosis.
OBJECTIVE: To measure the association between dietary fiber intake and eleven hormones and peptides in postmenopausal breast cancer survivors. METHODS: Intake of fiber from food and supplements was measured two to three years after breast cancer diagnosis in 493 postmenopausal women from three western states. Concurrently, a fasting blood sample was obtained for assay of estrone, estradiol, free estradiol, testosterone, free testosterone, dehydroepiandrosterone sulfate, sex hormone-binding globulin (SHBG), leptin, C-peptide, insulin-like growth factor-1 (IGF1), and IGF-binding protein-3. Adjusted means of these hormones and peptides were calculated for categories of fiber intake. RESULTS: High intake of dietary fiber was significantly (P<or=0.05) associated with low serum levels of estradiol and free estradiol and with high serum levels of IGF1. The combination of high dietary fiber intake and use of fiber supplements was additionally associated with low serum levels of C-peptide. The magnitude of the difference in hormone/peptide values, comparing high fiber intake to low fiber intake, varied from 16 to 28%, and the associations were independent of multiple confounding variables. CONCLUSION: High fiber diets may be beneficial to postmenopausal breast cancer survivors due to fiber's favorable influence on sex hormones and peptides known to affect breast cancer prognosis.
Authors: Sharon Wayne; Marian L Neuhouser; Cornelia M Ulrich; Carol Koprowski; Charles Wiggins; Kathy B Baumgartner; Leslie Bernstein; Richard N Baumgartner; Frank Gilliland; Anne McTiernan; Rachel Ballard-Barbash Journal: Cancer Epidemiol Biomarkers Prev Date: 2008-10-28 Impact factor: 4.254
Authors: Sharon J Wayne; Marian L Neuhouser; Carol Koprowski; Cornelia M Ulrich; Charles Wiggins; Frank Gilliland; Kathy B Baumgartner; Richard N Baumgartner; Anne McTiernan; Leslie Bernstein; Rachel Ballard-Barbash Journal: Breast Cancer Res Treat Date: 2008-10-18 Impact factor: 4.872
Authors: Willemijn A M van Gemert; Jolein I Iestra; Albertine J Schuit; Anne M May; Tim Takken; Wouter B Veldhuis; Job van der Palen; Harriët Wittink; Petra H M Peeters; Evelyn M Monninkhof Journal: BMC Cancer Date: 2013-08-23 Impact factor: 4.430