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Health benefits of chromones: common ingredients of our daily diet

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Abstract

Chromones are naturally occurring phenolic compounds that are universally present in a healthy human diet. To date, thousands of chromone derivatives, including chromone glycosides have been discovered, both from natural and synthetic origin. Many plant genera, including Aloe, Aquilaria, Cassia, Hypericum and Polygonum, are rich sources of chromones. Several genera of fungi, such as Aspergillus, Mycoleptodiscus, Orbiocrella, and Penicillium produce bioactive chromones. This class of compounds is mainly associated with anti-oxidant, antimicrobial, anticancer and anti-inflammatory activities. Various in vitro, in vivo and clinical studies have established the role of chromones in alleviating allergies, reducing oxidative damage, inhibiting cancer, infections and inflammation, and for treating neurological and psychiatric disorders. This review focuses mainly on natural chromones, and elaborates on their nutritional benefits, pharmacological activities, and mechanisms of action. Various scientific databases, including PubMed, Scopus and Google Scholar, were used to find relevant literature on chromones covering all available literature up to, and including the year 2019. This critical analysis of completed research regarding the nutraceutical properties of various chromone derivatives may provide new insight to scientists working in related fields.

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Abbreviations

ATP:

Adenosine triphosphate

CC50 :

50% cytotoxic concentration

DMSO:

Dimethyl sulfoxide

DPPH:

2,2-Diphenyl-1-picryl-hydrazyl free radicals

EC50 :

Half maximal effective concentration

fMLF:

Formyl-methionine-leucine-phenylalanine

FPR1:

Formyl peptide receptor-1

GST:

Glutathione S-transferase

HIV:

Human immunodeficiency virus

IC50 :

Half maximal inhibitory concentration to inhibit 50%

IgE:

Immunoglobulin E

i.v. :

Intraveneously

IZD:

Inhibition zone diameter

LPS:

Lipopolysaccharide

MAO:

Monoamine oxidase

MDR:

Multidrug-resistant

MIC:

Minimum inhibitory concentration

MTT:

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

NAD+ :

Nicotinamide adenine dinucleotide

NO:

Nitrogen oxide

ROS:

Radical oxygen species

SIRT2:

Sirtuin-2

TLC:

Thin layer chromatography

TNF:

Tumour necrosis factor

UV:

Ultraviolet

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This work was financially supported by the National Research Foundation of South Africa and the South African Medical Research Council (SAMRC).

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Semwal, R.B., Semwal, D.K., Combrinck, S. et al. Health benefits of chromones: common ingredients of our daily diet. Phytochem Rev 19, 761–785 (2020). https://doi.org/10.1007/s11101-020-09681-w

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