In vitro and in vivo digestion of octenyl succinic starch.
This study aimed to understand effects of octenyl succinic anhydride (OSA) modification of normal corn (NCS) and high-amylose corn (HA7) starch on their enzymatic hydrolysis rates. After modification with 3% and 10% OSA, resistant starch (RS) contents of the cooked OS-NCS increased from 0.8% of the control starch to 6.8% and 13.2% (Englyst Method), respectively, whereas that of the cooked OS-HA7 decreased from 24.1% to 23.7% and 20.9%, respectively. When the cooked NCS, HA7 and OS (10%)-HA7 were used to prepare diets for rats at 55% (w/w) starch, RS contents of the diets were 1.1%, 13.2% and 14.6%, respectively. After feeding to the rats, 20.2-31.1% of the starch in the OS (10%)-HA7-diet was not utilized in vivo and was found in rat feces, which was substantially larger than that of the HA7-diet (≤4.9%) and NCS-diet (≤0.2%). The body weights of the rats, however, remained similar between different groups.
Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011, USA. Electronic address: yfai@iastate.edu.
Yongfeng
Y
Ai
Bridget
B
Nelson
Diane F
DF
Birt
Jay-Lin
JL
Jane
D000688:Amylose / Q000737:chemistry; D000818:Animals; D001835:Body Weight; D004063:Digestion / Q000502:physiology*; D005243:Feces / Q000737:chemistry; D005526:Food, Formulated / Q000032:analysis*; D006868:Hydrolysis; D008297:Male; D051381:Rats; D011916:Rats, Inbred F344; D013213:Starch / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D013387:Succinic Anhydrides / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
D013387:Succinic Anhydrides; C551966:octenyl succinic anhydride-modified starch; D013213:Starch; D000688:Amylose
In vivo digestion of starch; Octenyl succinic starch; Rat body weight; Resistant starch