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Probing downstream olive biophenol secoiridoids

Sivakumar, Ganapathy ; Uccella, Nicola A. and Gentile, Luigi LU (2018) In International Journal of Molecular Sciences 19(10).
Abstract

Numerous bioactive biophenol secoiridoids (BPsecos) are found in the fruit, leaves, and oil of olives. These BPsecos play important roles in both the taste of food and human health. The main BPseco bioactive from green olive fruits, leaves, and table olives is oleuropein, while olive oil is rich in oleuropein downstream pathway molecules. The aim of this study was to probe olive BPseco downstream molecular pathways that are alike in biological and olive processing systems at different pHs and reaction times. The downstream molecular pathway were analyzed by high performance liquid chromatography coupled with electrospray ionization mass spectrometry (HPLC-ESI/MS) and typed neglected of different overlap (TNDO) computational methods. Our... (More)

Numerous bioactive biophenol secoiridoids (BPsecos) are found in the fruit, leaves, and oil of olives. These BPsecos play important roles in both the taste of food and human health. The main BPseco bioactive from green olive fruits, leaves, and table olives is oleuropein, while olive oil is rich in oleuropein downstream pathway molecules. The aim of this study was to probe olive BPseco downstream molecular pathways that are alike in biological and olive processing systems at different pHs and reaction times. The downstream molecular pathway were analyzed by high performance liquid chromatography coupled with electrospray ionization mass spectrometry (HPLC-ESI/MS) and typed neglected of different overlap (TNDO) computational methods. Our study showed oleuropein highest occupied molecular orbital (HOMO) and HOMO-1 triggered the free radical processes, while HOMO-2 and lowest unoccupied molecular orbital (LUMO) were polar reactions of glucoside and ester groups. Olive BPsecos were found to be stable under acid and base catalylic experiments. Oleuropein aglycone opened to diales and rearranged to hydroxytyrosil-elenolate under strong reaction conditions. The results suggest that competition among olive BPseco HOMOs could induce glucoside hydrolysis during olive milling due to native olive β-glucosidases. The underlined olive BPsecos downstream molecular mechanism herein could provide new insights into the olive milling process to improve BPseco bioactives in olive oil and table olives, which would enhance both the functional food and the nutraceuticals that are produced from olives.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Antioxidant, Biophenols, Hydroxytyrosol, Oleuropein, Olive oil, TNDO, Tyrosol
in
International Journal of Molecular Sciences
volume
19
issue
10
article number
2892
publisher
MDPI AG
external identifiers
  • pmid:30249049
  • scopus:85053842206
ISSN
1661-6596
DOI
10.3390/ijms19102892
language
English
LU publication?
yes
id
12e26937-67b8-45c9-96f7-505249810100
date added to LUP
2018-10-10 08:29:46
date last changed
2020-10-20 03:38:41
@article{12e26937-67b8-45c9-96f7-505249810100,
  abstract     = {<p>Numerous bioactive biophenol secoiridoids (BPsecos) are found in the fruit, leaves, and oil of olives. These BPsecos play important roles in both the taste of food and human health. The main BPseco bioactive from green olive fruits, leaves, and table olives is oleuropein, while olive oil is rich in oleuropein downstream pathway molecules. The aim of this study was to probe olive BPseco downstream molecular pathways that are alike in biological and olive processing systems at different pHs and reaction times. The downstream molecular pathway were analyzed by high performance liquid chromatography coupled with electrospray ionization mass spectrometry (HPLC-ESI/MS) and typed neglected of different overlap (TNDO) computational methods. Our study showed oleuropein highest occupied molecular orbital (HOMO) and HOMO-1 triggered the free radical processes, while HOMO-2 and lowest unoccupied molecular orbital (LUMO) were polar reactions of glucoside and ester groups. Olive BPsecos were found to be stable under acid and base catalylic experiments. Oleuropein aglycone opened to diales and rearranged to hydroxytyrosil-elenolate under strong reaction conditions. The results suggest that competition among olive BPseco HOMOs could induce glucoside hydrolysis during olive milling due to native olive β-glucosidases. The underlined olive BPsecos downstream molecular mechanism herein could provide new insights into the olive milling process to improve BPseco bioactives in olive oil and table olives, which would enhance both the functional food and the nutraceuticals that are produced from olives.</p>},
  author       = {Sivakumar, Ganapathy and Uccella, Nicola A. and Gentile, Luigi},
  issn         = {1661-6596},
  language     = {eng},
  number       = {10},
  publisher    = {MDPI AG},
  series       = {International Journal of Molecular Sciences},
  title        = {Probing downstream olive biophenol secoiridoids},
  url          = {http://dx.doi.org/10.3390/ijms19102892},
  doi          = {10.3390/ijms19102892},
  volume       = {19},
  year         = {2018},
}