Preparation, characterization, and mechanism of DPP-IV inhibitory peptides derived from Bactrian camel milk
In this study, double enzyme hydrolysis significantly enhanced the DPP-IV inhibition rate compared to single enzyme. The α + K enzymes exhibited the highest inhibition rate. Ultrasonic pretreatment for 30 min improved the hydrolysis efficiency and DPP-IV inhibition rate, potentially due to the struc...
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Veröffentlicht in: | International journal of biological macromolecules 2024-10, Vol.277 (Pt 3), p.134232, Article 134232 |
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Sprache: | eng |
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Zusammenfassung: | In this study, double enzyme hydrolysis significantly enhanced the DPP-IV inhibition rate compared to single enzyme. The α + K enzymes exhibited the highest inhibition rate. Ultrasonic pretreatment for 30 min improved the hydrolysis efficiency and DPP-IV inhibition rate, potentially due to the structural changes in hydrolysates, such as the increased surface hydrophobicity, and reduced particle size, α-helix and β-turn. Six peptides were screened and verified in vitro. QPY, WPEYL, and YPPQVM displayed competitive inhibition, while LPAAP and IPAPSFPRL displayed mixed competitive/non-competitive inhibition. The interactions between these six peptides and DPP-IV primarily occurred through hydrogen bonds, electrostatic and hydrophobic interactions. Network pharmacological analysis indicated that LPAAP might inhibit DPP-IV activity trough interactions with diabetes-related targets such as CASP3, HSP90AA1, MMP9, and MMP9. These results uncover the potential mechanism of regulating blood glucose by camel milk hydrolysates, establishing camel milk peptide as a source of DPP-IV inhibitory peptide.
•Combination of double enzymatic and ultrasonication improved DPP-IV inhibition.•Six peptides were screened based on the predicted results and in vitro test.•LPAAP exhibited highest active against DPP-IV, with IC50 values 199.66 ± 6.77 μM.•Molecular docking and network pharmacology predicted DPP-IV inhibition mechanism. |
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ISSN: | 0141-8130 1879-0003 1879-0003 |
DOI: | 10.1016/j.ijbiomac.2024.134232 |