Dietary Fibers from Mushroom Sclerotia. 4. In Vivo Mineral Absorption Using Ovariectomized Rat Model
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- 作者：Ka-Hing Wong ; Shin-Ichi Katsumata ; Ritsuko Masuyama ; Mariko Uehara ; Kazuharu Suzuki ; and Peter C. K. Cheung
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2006
- 出版时间：March 8, 2006
- 年：2006
- 卷：54
- 期：5
- 页码：1921 - 1927
- 全文大小：58K
- 年卷期：v.54,no.5(March 8, 2006)
- ISSN：1520-5118
文摘
The effect of three novel dietary fibers (DFs) prepared from mushroom sclerotia, namely, Pleurotustuber-regium, Polyporus rhinocerus, and Wolfiporia cocos, on calcium and magnesium absorptionwas evaluated in ovariectomized (OVX) rats fed with sclerotial DF based and low Ca (0.3%) diets for14 days. The animals in the W. cocos DF diet group possessed significantly (p < 0.05) higher levelsof cecal total short-chain fatty acids (204 
mol/g of cecal content) and had an acidic pH (5.88) intheir cecum when compared with those of the cellulose control group. Such an acidic environmentwas found to promote the ionization of the unabsorbed Ca and Mg in their cecum, which in turnsignificantly (p < 0.05) increased the concentrations of cecal soluble Ca (2.56-fold) and Mg (1.22-fold). Besides, the apparent Ca and Mg absorptions of the W. cocos DF group were also significantly(p < 0.05) enhanced (Ca, 16.5%; Mg, 15.3%) together with significantly (p < 0.05) higher serum Ca(3.61 mmol/L) and Mg (1.07 mmol/L) levels when compared with those of the cellulose control group.These data suggest that ingestion of W. cocos DF could improve the overall Ca and Mg absorptionsof the OVX rats fed a low Ca diet. The potential use of sclerotial DFs as a functional food ingredientfor enhancing mineral absorption is also discussed.Keywords: Calcium; magnesium; dietary fiber; mushroom sclerotia; ovariectomized rats
mol/g of cecal content) and had an acidic pH (5.88) intheir cecum when compared with those of the cellulose control group. Such an acidic environmentwas found to promote the ionization of the unabsorbed Ca and Mg in their cecum, which in turnsignificantly (p < 0.05) increased the concentrations of cecal soluble Ca (2.56-fold) and Mg (1.22-fold). Besides, the apparent Ca and Mg absorptions of the W. cocos DF group were also significantly(p < 0.05) enhanced (Ca, 16.5%; Mg, 15.3%) together with significantly (p < 0.05) higher serum Ca(3.61 mmol/L) and Mg (1.07 mmol/L) levels when compared with those of the cellulose control group.These data suggest that ingestion of W. cocos DF could improve the overall Ca and Mg absorptionsof the OVX rats fed a low Ca diet. The potential use of sclerotial DFs as a functional food ingredientfor enhancing mineral absorption is also discussed.Keywords: Calcium; magnesium; dietary fiber; mushroom sclerotia; ovariectomized rats