To understand the impact of different types of polyphenol-starch complexes on digestibility and gut microbiota, caffeic acid (CA) and corn starch (CS) complexes were prepared by coheating and high-pressure homogenization. The resistant starch content in CS coheated with CA (HCS-CA) and HCS-CA after high-pressure homogenization (HCS-CA-HPH) was 47.75 and 56.65%, respectively. Fourier transform infrared spectroscopy and X-ray diffraction analysis revealed hydrogen bonding in coheated samples and enhanced V-complex formation with high-pressure homogenization. The in vitro-digested complexes were of the B + V type, with higher relative crystallinity and short-range ordering of HCS-CA-HPH. Fermentation of the digested complex with human feces increased the yield of acetate, butyrate, and total short-chain fatty acids (SCFAs), which was more pronounced for HCS-CA-HPH. HCS-CA increased torques-Ruminococcaceae abundance, while HCS-CA-HPH boosted Prevotella, Roseburia, Lachnospiraceae, and Lachnospiraceae-NK4A136. Overall, CA and CS complexes enhanced beneficial bacteria and increased SCFA production.

中文翻译：

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咖啡酸和玉米淀粉复合物对肠道菌群的调节


为了解不同类型的多酚-淀粉复合物对消化率和肠道菌群的影响，通过共热和高压均质制备了咖啡酸 （CA） 和玉米淀粉 （CS） 复合物。CS 与 CA （HCS-CA） 和高压均质后 HCS-CA （HCS-CA-HPH） 加热的抗性淀粉含量分别为 47.75% 和 56.65%。傅里叶变换红外光谱和 X 射线衍射分析揭示了共加热样品中的氢键，并在高压均质化下增强了 V 复合物的形成。体外消化的复合物为 B + V 型，具有较高的相对结晶度和 HCS-CA-HPH 的短程有序性。消化复合物与人粪便发酵增加了乙酸盐、丁酸盐和总短链脂肪酸 （SCFA） 的产量，这在 HCS-CA-HPH 中更为明显。HCS-CA 增加了 torques-Ruminococcaceae 的丰度，而 HCS-CA-HPH 促进了 Prevotella、Roseburia、Lachnospiraceae 和 Lachnospiraceae-NK4A136。总体而言，CA 和 CS 复合物增强了有益菌并增加了 SCFA 的产生。