Characteristic Structures of Different Stilbenes Distinguish the Impact on Ochratoxin A Biosynthesis Intermediate Pathway and Metabolites of Aspergillus carbonarius .
Xinyu CaiBoqiang LiXue LiHui DangDi WangZhifei PeiXuan FengXueyan RenQingjun KongPublished in: Journal of agricultural and food chemistry (2023)
In this paper, we accurately pinpointed the inhibition sites of ochratoxin A (OTA) synthesis pathway in Aspergillus carbonarius acted by stilbenes from the perspective of oxidative stress and comprehensively explored the relationship between the physical and chemical properties of natural polyphenolic substances and their biochemical properties of antitoxin. To facilitate the application of ultra-high-performance liquid chromatography and triple quadrupole mass spectrometry for real-time tracking of pathway intermediate metabolite content, the synergistic effect of Cu 2+ -stilbenes self-assembled carriers was utilized. Cu 2+ increased the generation of reactive oxygen species to accumulate mycotoxin content, while stilbenes had the inhibitory effect. The impact of the m -methoxy structure of pterostilbene on A. carbonarius was found to be superior to that of resorcinol and catechol. The m -methoxy structure of pterostilbene acted on the key regulator Yap1 , downregulated the expression of antioxidant enzymes, and accurately inhibited the halogenation step of the OTA synthesis pathway, thus accumulating the content of OTA precursors. This provided a theoretical basis for the extensive and efficient application of a wide range of natural polyphenolic substances for postharvest disease control and quality assurance of grape products.
Keyphrases
- mass spectrometry
- oxidative stress
- tandem mass spectrometry
- ultra high performance liquid chromatography
- reactive oxygen species
- cell wall
- high performance liquid chromatography
- high resolution
- poor prognosis
- dna damage
- drinking water
- mental health
- transcription factor
- gas chromatography
- physical activity
- simultaneous determination
- long non coding rna
- diabetic rats
- ischemia reperfusion injury
- solid phase extraction
- cancer therapy
- metal organic framework