title: Plum and soy aglycon extracts superior at increasing bone calcium retention in ovariectomized Sprague Dawley rats.
abstract: Plant-derived polyphenols have been shown to influence bone turnover and bone properties in the estrogen-depleted state. We used a crossover design in ovariectomized rats (n = 16 rats for each diet) to investigate the effect of supplementation of two doses each of blueberry, plum, grape, grape seed extract, and resveratrol on bone. We tested the aglycon and glucoside forms of genistein to quantify differences in efficacy on bone calcium retention. Rats were given an intravenous dose of ⁴⁵Ca to prelabel bone, and bone calcium retention was assessed by urinary excretion of ⁴⁵Ca:Ca ratio during an intervention period compared with nonintervention. Genistein aglycon increased bone calcium retention significantly (p<0.05) more than the glucoside (22% vs 13%, respectively). Plum extract (0.45% w/w total dietary polyphenols) and resveratrol (0.2% w/w total dietary polyphenols) were also effective, increasing bone calcium retention by 20% (p=0.0153) and 14% (p=0.0012), respectively. Several polyphenolic-rich diets improved bone calcium retention.
authors.affiliation: Department of Nutrition Science, College of Health and Human Sciences, Purdue University , 700 West State Street, West Lafayette, Indiana 47907, United States.
authors.forename: Jessica W
authors.initials: JW
authors.lastname: Pawlowski
authors.forename: Berdine R
authors.initials: BR
authors.lastname: Martin
authors.forename: George P
authors.initials: GP
authors.lastname: McCabe
authors.forename: Mario G
authors.initials: MG
authors.lastname: Ferruzzi
authors.forename: Connie M
authors.initials: CM
authors.lastname: Weaver
mesh_terms: D000818:Animals; D050071:Bone Density Conservation Agents / Q000737:chemistry / Q000627:therapeutic use*; D019587:Dietary Supplements; D005260:Female; D005638:Fruit / Q000737:chemistry*; D019833:Genistein / Q000737:chemistry / Q000627:therapeutic use; D005960:Glucosides / Q000737:chemistry / Q000627:therapeutic use; D006801:Humans; D006868:Hydrolysis; D015663:Osteoporosis, Postmenopausal / Q000178:diet therapy*; D010936:Plant Extracts / Q000737:chemistry / Q000627:therapeutic use*; D027861:Prunus / Q000737:chemistry*; D011897:Random Allocation; D017207:Rats, Sprague-Dawley; D012639:Seeds / Q000737:chemistry; D013025:Glycine max / Q000737:chemistry*
chemical_list: D050071:Bone Density Conservation Agents; D005960:Glucosides; D010936:Plant Extracts; D019833:Genistein
keywords: bone calcium retention; bone resorption; genistein aglycon; genistein glucoside; plant-derived polyphenols