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Flavones

Structure, Properties, Sources and Food Applications

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Handbook of Food Bioactive Ingredients

Abstract

This chapter is dedicated to the natural antioxidants having 2-phenyl-4H-1-benzopyran-4-one skeleton and hydroxyl groups on the aromatic rings only. The main physical-chemical and biological properties, as well as the natural occurrence and food applications of the main flavones, are discussed. The chemistry and functionality of the main compounds from this class allow identifying their biological activities and their further applications. This part is focused on chrysin, apigenin, acacetin, baicalein, luteolin, diosmetin, scutellarein, hispidulin, tricetin, sinensetin, tangeretin, serpyllin, nobiletin, and scaposin. However, the number of flavone compounds with pharmaceutical and food applications is much higher than this list. Correlations between structural characteristics and properties of flavones have also been presented in this chapter. We have focused on the main groups responsible for many biological and antioxidant activities and properties related to flavone bioavailability. Thus, phenolic hydroxyl groups and solubility parameters were considered. On the other hand, molecular surface accessibility, oxidation susceptibility, and antioxidant mechanisms were discussed. The biosynthesis of the main flavone compounds and enhancing their enzymatic production for industrial purposes are also presented in this chapter. A significant part of this chapter is dedicated to the identification and quantification of flavone aglycones and glycosides in plants, vegetables, fruits, grains, and foods, as well as their interactions with food ingredients and matrices, production, and applications in food products. The separation and purification techniques and modern analytical methods used for flavone evaluation were surveyed, pointing out the most recent studies in the field. Finally, conclusions and future perspectives related to flavone research, especially their applications in food and pharmaceutical fields, have been presented.

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Abbreviations

1H/13C-NMR:

1H/13C-nuclear magnetic resonance

ABTS·+:

2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation

CD:

Circular dichroism

CFI:

Chalcone-flavanone isomerase

CHS:

Chalcone synthase

CoA:

Coenzyme A

COVID-19:

Coronavirus disease 2019

CUPRAC:

Cupric reducing antioxidant capacity

DPPH·:

2,2-diphenyl-1-pycrylhydrazyl radical

DW:

Dry weight

EC:

Enzyme Commission numbers

EC50:

Half maximal effective concentration

Ecugd:

Uridine diphosphate glucose dehydrogenase from Escherichia coli

EI/ESI-MS:

Electrospray ionization-mass spectrometry

F3′5′H:

Flavonoid 3′,5′-hydroxylase

FAB-MS:

Fast atom bombardment-mass spectrometry

FAME:

Fatty acid methyl ester

FRAP:

Ferric reducing antioxidant power

FS:

Flavone synthase

FT-IR:

Fourier transform infrared spectroscopy

FW:

Fresh weight

GAE:

Gallic acid equivalent

GC-FID/MS:

Gas chromatography coupled with flame ionization detector/mass spectrometry detector

GEArray:

Gene expression profiles of 96 genes indicative of mouse stress and toxicity

GmSUS:

Glycine max sucrose synthase

Gpx:

Glutathione peroxidase

HAT:

H-atom transfer

HHP:

High hydrostatic pressure

HOMO:

Highest occupied molecular orbital

HPLC-UV-Vis/DAD/MS:

High-pressure liquid chromatography coupled with ultraviolet-visible spectrophotometric detector/diode array detector/mass spectrometry detector

HPLC-MS/MS/MSn/MRM-MS:

Liquid chromatography coupled with tandem mass spectrometry (MS/MS or MSn)/ multiple reaction monitoring-mass spectrometry detector

HP-TLC:

High-performance thin layer chromatography

HSA:

Human serum albumin

iNOS:

Inducible nitric oxide synthase

IR:

Infrared spectroscopy

IUBMB:

Nomenclature Committee of the International Union of Biochemistry and Molecular Biology

LC-CE-MS:

Liquid chromatography-capillary electrophoresis-mass spectrometry

LC-ESI-MS:

Liquid chromatography coupled with electrospray ionization – mass spectrometry detector

LC-HRMS:

Liquid chromatography coupled with high-resolution mass spectrometry detector

LDL:

Low-density lipoprotein

LPO:

Lipid peroxidation

LUMO:

Lowest unoccupied molecular orbital

MAE:

Microwave-assisted extraction

MsCHI:

Chalcone isomerase from Medicago sativa

MTT:

3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide

NADP+/NADPH:

Nicotinamide adenine dinucleotide phosphate/reduced form

ObFOMT:

Ocimum basilicum L. flavonoid O-methyltransferase

OMT:

O-methyltransferase

ORAC:

Oxygen radical absorbance capacity

PcFNS I:

Flavone synthase I from Petroselinum crispum

pE-AmUGT10:

pET gene + uridine diphosphate-dependent glycosyltransferase specific for UDP-glucuronic acid from Antirrhinum majus

PhCHS:

Chalcone synthase from Petunia X hybrid

PLA:

Poly(lactide)

PLE:

Pressurized liquid extraction

QE:

Quercetin equivalent

rpm:

Revolutions per minute

RSC:

Radical scavenging capacity

SARS-CoV-2:

Severe acute respiratory syndrome coronavirus 2

SbFNS II:

Flavone synthase II from Scutellaria baicalensis

SbF6H:

Flavone 6-hydroxylase from S. baicalensis

SEM:

Scanning electron microscopy

SET-PT:

Single electron transfer-proton transfer

SPE:

Solid-phase extraction

SPLET:

Sequential proton loss electron transfer

SPME:

Solid-phase microextraction

SOD:

Superoxide dismutase

TaOMT2:

Triticum aestivum L. O-methyltransferase (recombinant)

TBARS:

Thiobarbituric acid reactive substances

TcCGT:

Trollius chinensis C-glycosyltransferase

TEM:

Transmission electron microscopy

TLC:

Thin layer chromatography

TPC:

Total phenolic content

TRP:

Total reducing power

UAE:

Ultrasound-assisted extraction

UAPLE:

Ultrasound-assisted pressurized liquid extraction

UDP-Glu:

Uridine diphosphate glucose

UDP-GT:

Uridine diphosphate glucuronotransferase

UHPLC-MS/MS:

Ultrahigh-pressure liquid chromatography coupled with tandem mass spectrometry detector

UPLC-PDA-ESI/QTOF-MS/MS2:

Ultrahigh-pressure liquid chromatography coupled with photodiode array detector and electrospray ionization/quadrupole time-of-flight-mass spectrometry/tandem mass spectrometry detector

UPLC-QE-HRMS:

Ultrahigh-performance liquid chromatography-high-resolution mass spectrometry detector

UV-Vis:

Ultraviolet-visible spectrophotometry

XRD:

X-ray diffractometry

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Correspondence to Nicoleta-Gabriela Hădărugă .

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Hădărugă, DI., Hădărugă, NG. (2023). Flavones. In: Jafari, S.M., Rashidinejad, A., Simal-Gandara, J. (eds) Handbook of Food Bioactive Ingredients. Springer, Cham. https://doi.org/10.1007/978-3-030-81404-5_4-1

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  • DOI: https://doi.org/10.1007/978-3-030-81404-5_4-1

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-81404-5

  • Online ISBN: 978-3-030-81404-5

  • eBook Packages: Springer Reference Biomedicine and Life SciencesReference Module Biomedical and Life Sciences

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