In vitro digestion and fermentation characteristics of soluble dietary fiber from adlay (Coix lacryma-jobi L. var. ma-yuen Staft) bran modified by steam explosion

• Published in: Food research international Vol. 192; p. 114747
• Main Authors: Zhou, Shuxin, Tang, Xinjing, Hegyi, Ferenc, Nagy, András, Takács, Krisztina, Zalán, Zsolt, Chen, Guangjing, Du, Muying
• Format: Journal Article
• Language: English
• Published: Canada Elsevier Ltd 01.09.2024
• Subjects: Adlay bran; Antioxidants - analysis; Antioxidants - metabolism; Coix - chemistry; Dietary Fiber - metabolism; Digestion; Fatty Acids, Volatile - analysis; Fatty Acids, Volatile - metabolism; Fermentation; Food Handling - methods; Gastrointestinal digestion; Gastrointestinal Microbiome - physiology; Humans; In vitro fermentation; Propionates - metabolism; SCFAs; Soluble dietary fiber; Steam; Steam explosion; Gastrointestinal digestion; SCFAs; Steam explosion; Adlay bran; In vitro fermentation; Soluble dietary fiber
• ISSN: 0963-9969; 1873-7145; 1873-7145
• DOI: 10.1016/j.foodres.2024.114747

[Display omitted] •Steam explosion (SE) increased adlay bran soluble dietary fiber (SDF) content.•SE modified adlay bran SDF (SE-SDF) showed benefits for human health.•Most of the phenolic compounds and antioxidant capacity were increased in SE-SDF.•SE-SDF showed positive effects on intestinal flora diversity.•SE-SDF affected the metabolism of the intestinal microecology. Adlay bran is known for its nutrient-rich profile and multifunctional properties, and steam explosion (SE) is an emerging physical modification technique. However, the specific effects of SE on the activity composition and antioxidant capacity of adlay bran soluble dietary fiber (SDF) during in vitro digestion, as well as its influence on gut microbiota during in vitro fermentation, remain inadequately understood. This paper reports the in vitro digestion and fermentation characteristics of soluble dietary fiber from adlay bran modified by SE (SE-SDF). Compared with the untreated samples (0-SDF), most of the phenolic compounds and antioxidant capacity were significantly increased in the SE-SDF digests. Additionally, SE was beneficial for adlay bran SDF to increase the content of acetic acid, propionic acid and total short-chain fatty acids (SCFAs) in fermentation broth during in vitro fermentation. SE-SDF could promote the growth of beneficial bacteria while inhibiting the proliferation of pathogenic microbes. Our research indicates that SE-SDF shows strong antioxidant properties after in vitro digestion and plays a pivotal role in regulating gut microbiota during in vitro fermentation, ultimately enhancing human intestinal health.