Characterization of Phyllobilins in Hops: Antioxidant and Potentially Bitter Senescence-Related Metabolites
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View abstract on PubMed
Summary
This summary is machine-generated.New bioactive compounds called phyllobilins were discovered in hops leaves. These compounds, including phylloxanthobilins (DPxBs), show high antioxidant activity and may contribute to the visual changes during hops senescence.
Area Of Science
- Phytochemistry
- Plant biochemistry
- Medicinal plant research
Background
- Hops (Humulus lupulus) is significant in food and medicine.
- Its phytochemistry includes phenolics and bitter compounds.
- Phyllobilins, from chlorophyll breakdown, are underexplored in hops.
Purpose Of The Study
- Identify and characterize novel phyllobilins in hops leaves.
- Investigate the role of these compounds in hops senescence.
- Evaluate the bioactivity and potential applications of identified phyllobilins.
Main Methods
- Isolation and purification of phyllobilins from yellow hops leaves.
- Structural elucidation using UV/vis, HR-MS², and NMR spectroscopy.
- Assessment of antioxidative activity and bitterness prediction.
Main Results
- Several new dioxobilin-type phylloleucobilins (DPleBs) and phylloxanthobilins (DPxBs) were identified.
- Hl-DPxB constituted a significant portion of yellow leaf pigments, indicating a role in senescence.
- Hl-DPxB-31 demonstrated high antioxidant activity and a predicted bitterness probability over 60%.
Conclusions
- This study expands the known phytochemical profile of hops.
- Identified phyllobilins represent new bioactive compounds with potential applications.
- Hops leaf waste could be upcycled for these valuable compounds.
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