Development and applications of enzymatic modified starch with high water solubility providing a continuous supply of glucose

Eun-A Kim; Ye-Rim Lee; Eun-Hyeong Lee; Hyun-Mo Jeong; Byung Sik Kang; Byung-Hak Kim; Sang Jae Park; Jae-Hoon Shim

doi:10.1016/j.ijbiomac.2023.126107

Development and applications of enzymatic modified starch with high water solubility providing a continuous supply of glucose

Int J Biol Macromol. 2023 Oct 1:250:126107. doi: 10.1016/j.ijbiomac.2023.126107. Epub 2023 Aug 1.

Authors

Eun-A Kim¹, Ye-Rim Lee², Eun-Hyeong Lee³, Hyun-Mo Jeong⁴, Byung Sik Kang⁵, Byung-Hak Kim⁶, Sang Jae Park⁷, Jae-Hoon Shim⁸

Affiliations

¹ Department of Food Science and Nutrition, The Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, Republic of Korea. Electronic address: pengsoo@hallym.ac.kr.
² Department of Food Science and Nutrition, The Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, Republic of Korea. Electronic address: yerim@hallym.ac.kr.
³ Department of Food Science and Nutrition, The Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, Republic of Korea. Electronic address: ehlee2919@hallym.ac.kr.
⁴ Department of Food Science and Nutrition, The Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, Republic of Korea. Electronic address: 41351@hallym.ac.kr.
⁵ Medience Co. Ltd., Chuncheon, Gangwon-do 24232, Republic of Korea. Electronic address: bskang@mdec.co.kr.
⁶ Medience Co. Ltd., Chuncheon, Gangwon-do 24232, Republic of Korea. Electronic address: bhkim@mdec.co.kr.
⁷ Medience Co. Ltd., Chuncheon, Gangwon-do 24232, Republic of Korea.
⁸ Department of Food Science and Nutrition, The Korean Institute of Nutrition, Hallym University, Hallymdaehak-gil 1, Chuncheon, Gangwon-do 24252, Republic of Korea. Electronic address: jhshim@hallym.ac.kr.

PMID: 37536417
DOI: 10.1016/j.ijbiomac.2023.126107

Abstract

Amylopectin clusters (APCs) are produced by cyclodextrin glucanotransferase (EC 2.4.1.19). Their solubility rate in aqueous solution was found to be 16.7 %. The weight-average molecular weight of APCs is ∼10⁵ Da, as determined by multiangle laser light scattering analysis. Side chain length analysis indicated that the relative proportions of side chains with a degree of polymerization in the ranges of 2-8 and 25-50 decreased and increased, respectively, during preparation of APCs. In the exercise experiment, the blood glucose level of rats was higher in the APC-treated group than in the groups treated with commercial carbohydrate supplement (CCD) and glucose. In the forced swimming test, the swimming time in the APC and CCD groups increased by 22.6 % and 31.1 %, respectively, compared with the glucose administration group. The insulin levels were also similar between the APC and CCD groups. However, the glycogen levels in the liver and muscles of mice were significantly higher in the APC group than control group. These results suggest that APCs could potentially enhance endurance when added to sports drinks.

Keywords: Amylopectin cluster; Cyclodextrin glucanotransferase; Starch; Water solubility.