title: A soybean cultivar lacking lipoxygenase 2 and 3 has similar calcium bioavailability to a commercial variety despite higher calcium absorption inhibitors.
abstract: The aim of this study was to evaluate calcium bioavailability of a new soybean variety without 2 lipoxygenases with better taste and flavor than a commercial variety containing all 3 isozymes. Using the femur (45)Ca uptake method, calcium absorption from a new Brazilian variety, UFV-116, was compared to a common Brazilian variety, OCEPAR 19. Male Sprague-Dawley growing rats weighing 150 to 170 g (10/group) received test meals of whole fat soy flour prepared from UFV-116 or OCEPAR-19 seeds labeled with 10 microCi of (45)Ca. Femurs were removed after 48 h for determination of (45)Ca uptake. Calcium fractional absorption was equivalent between the 2 varieties. The higher oxalate:calcium molar ratio and the higher content of oxalate and phytate (P < 0.05) found in the UFV-116 variety did not affect calcium absorption. Therefore, the new variety is a comparable source of high bioavailable calcium.
authors.affiliation: Department of Foods and Nutrition, Purdue University, West Lafayette, IN 47906, USA.
authors.forename: H S D
authors.initials: HS
authors.lastname: Martino
authors.forename: B R
authors.initials: BR
authors.lastname: Martin
authors.forename: C M
authors.initials: CM
authors.lastname: Weaver
authors.forename: J
authors.initials: J
authors.lastname: Bressan
authors.forename: M A
authors.initials: MA
authors.lastname: Moreira
authors.forename: N M B
authors.initials: NM
authors.lastname: Costa
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001682:Biological Availability; D001842:Bone and Bones / Q000378:metabolism; D002121:Calcium Channel Blockers; D002132:Calcium Radioisotopes; D002136:Calcium, Dietary / Q000493:pharmacokinetics*; D005269:Femur / Q000378:metabolism*; D007408:Intestinal Absorption / Q000187:drug effects*; D008084:Lipoxygenase / Q000172:deficiency / Q000378:metabolism; D008297:Male; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D013025:Glycine max / Q000737:chemistry* / Q000201:enzymology*
chemical_list: D002121:Calcium Channel Blockers; D002132:Calcium Radioisotopes; D002136:Calcium, Dietary; C095864:lipoxygenase 3; D008084:Lipoxygenase