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<p>Due to its notable nutritional value and physiological regulating function, dietary fiber from Auricularia auricula has elicited great interest in nutrition and health science. However, the relationship between its insoluble and soluble components lacks systematic comparison, and the specific mechanism by which it regulates intestinal function remains unclear. In this work, an enzyme-ultrasound method was used to extract dietary fiber from Auricularia auricula and tested structural and physicochemical properties of <i>Auricularia auricula insoluble dietary fiber</i> (AIDF) and <i>Auricularia auricula soluble dietary fiber</i> (ASDF). The AIDF yield stood at 57.49%, and the ASDF yield was 8.82%. Structural and physicochemical analyses indicate that AIDF possessed a looser, porous structure and superior in vitro adsorption capacities (2.0-fold higher oil-holding and 4.9-fold higher glucose adsorption), while ASDF contained unique monosaccharides and demonstrated more potent in vivo laxative effects in constipated mice. Compared with the model group, high-dose ASDF shortened the time of the first black stool excretion by approximately 91&#xa0;min, increased the number of fecal particles by more than 9 within 6&#xa0;h, and increased the ink propulsion rate by approximately 38%. The regulatory effect was comparable to that of the PEG group. Both high-dose group fibers alleviated constipation by modulating serum gastrointestinal peptides, elevating motilin (MTL) levels by average 66.59% and reducing somatostatin (SS) by average 29.39%. These findings suggest that both AIDF and ASDF have potential applications as functional foods for enhancing gastrointestinal well-being.</p>

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Extraction and structural properties of Auricularia auricula dietary fiber and its intestinal regulatory effects in mice

  • 期刊论文

  • 发表日期：

    2025年11月18日

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  • Ziyi Zhao,
  • Shaowa Lv,
  • Bin Wu,
  • Zejun Meng,
  • Shuang Sun,
  • Changrui Shan,
  • Huan Zhang,
  • Tao Gao,
  • Yuyan Guo

摘要

Due to its notable nutritional value and physiological regulating function, dietary fiber from Auricularia auricula has elicited great interest in nutrition and health science. However, the relationship between its insoluble and soluble components lacks systematic comparison, and the specific mechanism by which it regulates intestinal function remains unclear. In this work, an enzyme-ultrasound method was used to extract dietary fiber from Auricularia auricula and tested structural and physicochemical properties of Auricularia auricula insoluble dietary fiber (AIDF) and Auricularia auricula soluble dietary fiber (ASDF). The AIDF yield stood at 57.49%, and the ASDF yield was 8.82%. Structural and physicochemical analyses indicate that AIDF possessed a looser, porous structure and superior in vitro adsorption capacities (2.0-fold higher oil-holding and 4.9-fold higher glucose adsorption), while ASDF contained unique monosaccharides and demonstrated more potent in vivo laxative effects in constipated mice. Compared with the model group, high-dose ASDF shortened the time of the first black stool excretion by approximately 91 min, increased the number of fecal particles by more than 9 within 6 h, and increased the ink propulsion rate by approximately 38%. The regulatory effect was comparable to that of the PEG group. Both high-dose group fibers alleviated constipation by modulating serum gastrointestinal peptides, elevating motilin (MTL) levels by average 66.59% and reducing somatostatin (SS) by average 29.39%. These findings suggest that both AIDF and ASDF have potential applications as functional foods for enhancing gastrointestinal well-being.