研究聚糖-酸相互作用和生物模拟食纤维的消化行为
Wen Zhang1, Yue Zhang1, Qian-Yu Zhang1,2
1School of Food Science and Engineering, Shaanxi University of Science and Technology, Xi'an, China.
Journal of the science of food and agriculture
|February 11, 2025
概括
这项研究开发了一种生物模拟的食纤维模型,表明结合的酸 (GA) 增强了抗氧化能力,并由于与多糖的相互作用而提高了生物可访问性.
科学领域:
- 食品科学与技术 食品科学与技术
- 生物材料工程 生物材料工程
- 营养生物化学 营养生物化学
背景情况:
- 酸 (GA) 具有显著的抗氧化和抗炎性质.
- 食品加工和消费影响GA与细胞壁多糖的相互作用,影响其生物可用性和生物可访问性.
研究的目的:
- 开发一种生物模拟食纤维 (BDF) 模型,使用细菌纤维素,pectin和GA.
- 调查BDF中的多糖和GA之间的相互作用,消化行为和抗氧化剂协同作用.
主要方法:
- 一个由细菌纤维素,pectin和GA组成的BDF模型的合成.
- 描述BDF的微观结构,组成和结晶性.
- 模拟体外消化 (胃和小肠) 以评估GA释放和结合.
- 自由基清除试验用于评估抗氧化能力.
主要成果:
- 合成的BDF表现出与天然食纤维相提并论的特性.
- 在模拟消化过程中,释放了38.02%的GA,剩下的61.98%与多糖化合物结合.
- 与自由GA相比,在BDF内结合的GA表现出更高的抗氧化能力.
结论:
- 多糖-GA 相互作用是由非共价力 (键,疏水性,范德瓦尔斯) 介导的.
- GA的释放涉及BDF网络的扩散,BDF的解体和pectin的溶解.
- 多糖类保护GA的生物活性,增强其抗氧化剂协同作用,改善生物可访问性,为抗氧化损伤的饮食干预提供了潜力.
相关概念视频
Carbohydrate Digestion
113.6K
Carbohydrate digestion and metabolism break down simple and complex carbohydrates from food into saccharides (i.e., sugars) for the body to use as energy. Carbohydrate digestion starts in the mouth during mastication, or chewing. The masticated carbohydrates remain intact in the stomach. Digestion resumes in the duodenum of the small intestine, where pancreatic alpha-amylase and brush border enzymes of the microvilli convert complex carbohydrates to monosaccharides. Finally, the monosaccharides...
113.6K
Oligosaccharide Assembly
2.8K
Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
Multiple sugar molecules that may or may...
Multiple sugar molecules that may or may...
2.8K
What is Monogastric Digestion?
70.4K
The human body contains a monogastric digestive system. In a monogastric digestive system, the stomach only contains one chamber in which it digests food. Several other animal species also have monogastric digestive systems, including pigs, horses, dogs, and birds. This chapter, however, focuses on the human digestive system.
70.4K
Carbohydrate Absorption
445
Carbohydrates are essential macronutrients that serve as the body's primary energy source. Their digestion begins in the mouth, where salivary amylase partially breaks down complex carbohydrates such as starch into smaller oligosaccharides. This mechanical and enzymatic activity prepares carbohydrates for further processing in the gastrointestinal tract.
After being swallowed, the partially digested carbohydrates mix with gastric secretions in the stomach. However, the acidic environment...
After being swallowed, the partially digested carbohydrates mix with gastric secretions in the stomach. However, the acidic environment...
445
Hydrolysis
104.1K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
104.1K
Cellulose and Pectic Polysaccharides
3.5K
Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth. Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the...
As a cell matures, its cell wall specializes according to its type. For example, the...
3.5K


