Characterization and In Vitro Prebiotic Activity of Pterostilbene/β-Cyclodextrin Inclusion Complexes
Pterostilbene (PTS) has multiple benefits, but poor water solubility and bioavailability limit its application. PTS/β-CD inclusion complexes were synthesized through the phase solubility method to enhance their water solubility. The inclusion complexes were characterized through Fourier transform in...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-03-01
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| Series: | Molecules |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1420-3049/30/6/1363 |
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| Summary: | Pterostilbene (PTS) has multiple benefits, but poor water solubility and bioavailability limit its application. PTS/β-CD inclusion complexes were synthesized through the phase solubility method to enhance their water solubility. The inclusion complexes were characterized through Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, nuclear magnetic resonance, and molecular docking techniques. The results demonstrated that PTS and β-CD successfully created inclusion complexes with a host–guest ratio of 1:1 and a stability constant of 166.7 M<sup>−1</sup>. To further investigate its prebiotic function, simulated digestion experiments revealed that β-CD exhibited resistance to digestion, allowing it to reach the colon intact. During gastrointestinal digestion, PTS in the PTS/β-CD inclusion complexes was gradually released. Following digestion, the in vitro fermentation of healthy human feces further confirmed the probiotic properties. Compared to the β-CD and fructooligosaccharide (FOS) groups, the PTS/β-CD group significantly increased the production of acetic acid, butyric acid, and lactic acid, respectively. Additionally, beneficial bacteria, such as <i>Bifidobacterium</i> and <i>Lactobacillus</i>, proliferated in the PTS/β-CD group, while the relative abundance of potential pathogenic bacteria, such as <i>Lactococcus</i>, <i>Streptococcus</i>, and <i>Klebsiella</i>, was significantly reduced. Compared to the blank group, propionic acid and butyric acid concentrations in the β-CD group were significantly higher. The abundance of <i>Lactobacillus</i> and other key bacterial species in the β-CD group increased, while the relative abundance of <i>Klebsiella</i> and other pathogens decreased significantly. In conclusion, PTS/β-CD inclusion complexes altered the composition of intestinal flora, promoting the proliferation of beneficial bacteria and inhibiting the growth of harmful bacteria, thereby demonstrating dual probiotic functionality. |
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| ISSN: | 1420-3049 |