The Leptospermum scoparium (Mānuka)-Specific Nectar and Honey Compound 3,6,7-Trimethyllumazine (LepteridineTM) That Inhibits Matrix Metalloproteinase 9 (MMP-9) Activity

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dc.citation.issue22
dc.citation.volume12
dc.contributor.authorLin B
dc.contributor.authorNair S
dc.contributor.authorFellner DMJ
dc.contributor.authorNasef NA
dc.contributor.authorSingh H
dc.contributor.authorNegron L
dc.contributor.authorGoldstone DC
dc.contributor.authorBrimble MA
dc.contributor.authorGerrard JA
dc.contributor.authorDomigan L
dc.contributor.authorEvans JC
dc.contributor.authorStephens JM
dc.contributor.authorMerry TL
dc.contributor.authorLoomes KM
dc.coverage.spatialSwitzerland
dc.date.accessioned2024-05-21T02:21:25Z
dc.date.available2024-05-21T02:21:25Z
dc.date.issued2023-11-09
dc.description.abstract3,6,7-trimethyllumazine (Lepteridine™) is a newly discovered natural pteridine derivative unique to Mānuka (Leptospermum scoparium) nectar and honey, with no previously reported biological activity. Pteridine derivative-based medicines, such as methotrexate, are used to treat auto-immune and inflammatory diseases, and Mānuka honey reportedly possesses anti-inflammatory properties and is used topically as a wound dressing. MMP-9 is a potential candidate protein target as it is upregulated in recalcitrant wounds and intestinal inflammation. Using gelatin zymography, 40 μg/mL LepteridineTM inhibited the gelatinase activities of both pro- (22%, p < 0.0001) and activated (59%, p < 0.01) MMP-9 forms. By comparison, LepteridineTM exerted modest (~10%) inhibition against a chromogenic peptide substrate and no effect against a fluorogenic peptide substrate. These findings suggest that LepteridineTM may not interact within the catalytic domain of MMP-9 and exerts a negligible effect on the active site hydrolysis of small soluble peptide substrates. Instead, the findings implicate fibronectin II domain interactions by LepteridineTM which impair gelatinase activity, possibly through perturbed tethering of MMP-9 to the gelatin matrix. Molecular modelling analyses were equivocal over interactions at the S1' pocket versus the fibronectin II domain, while molecular dynamic calculations indicated rapid exchange kinetics. No significant degradation of synthetic or natural LepteridineTM in Mānuka honey occurred during simulated gastrointestinal digestion. MMP-9 regulates skin and gastrointestinal inflammatory responses and extracellular matrix remodelling. These results potentially implicate LepteridineTM bioactivity in Mānuka honey's reported beneficial effects on wound healing via topical application and anti-inflammatory actions in gastrointestinal disorder models via oral consumption.
dc.description.confidentialfalse
dc.edition.editionNovember 2023
dc.format.pagination4072-
dc.identifier.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/38002130
dc.identifier.citationLin B, Nair S, Fellner DMJ, Nasef NA, Singh H, Negron L, Goldstone DC, Brimble MA, Gerrard JA, Domigan L, Evans JC, Stephens JM, Merry TL, Loomes KM. (2023). The Leptospermum scoparium (Mānuka)-Specific Nectar and Honey Compound 3,6,7-Trimethyllumazine (LepteridineTM) That Inhibits Matrix Metalloproteinase 9 (MMP-9) Activity.. Foods. 12. 22. (pp. 4072-).
dc.identifier.doi10.3390/foods12224072
dc.identifier.eissn2304-8158
dc.identifier.elements-typejournal-article
dc.identifier.issn2304-8158
dc.identifier.number4072
dc.identifier.piifoods12224072
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69625
dc.languageeng
dc.publisherMDPI (Basel, Switzerland)
dc.publisher.urihttps://www.mdpi.com/2304-8158/12/22/4072
dc.relation.isPartOfFoods
dc.rights(c) 2023 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectLepteridine
dc.subjectLeptospermum scoparium
dc.subjectMMP-9
dc.subjectMānuka honey
dc.subjectgastric ulcers
dc.subjectinflammation
dc.subjectmatrix metalloproteinase 9
dc.titleThe Leptospermum scoparium (Mānuka)-Specific Nectar and Honey Compound 3,6,7-Trimethyllumazine (LepteridineTM) That Inhibits Matrix Metalloproteinase 9 (MMP-9) Activity
dc.typeJournal article
pubs.elements-id484940
pubs.organisational-groupOther
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