Identification of polyphenols from antiviral Chamaecrista nictitans extract using high-resolution LC–ESI–MS/MS




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Mateos Martín, María Luisa
Fuguet, Elisabet
Jiménez Ardón, Allan Miguel
Herrero Uribe, Libia
Tamayo Castillo, Giselle
Torres, Josep Lluís

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Chamaecrista nictitans (L) extract possesses antiviral properties; it acts against the herpes simplex virus, and this may be attributed to its constituent phenolics. Here, high-resolution LC–ESI–MS/MS is used to identify the phenolic components of the most potent fraction of the extract. The fraction is a complex mixture rich in oligomeric proanthocyanidins with a high content of monohydroxyphenol moieties ((epi)fisetinidol, (epi)afzelechin and (epi)guibourtinidol) and A-type linkages, uncommon in other proanthocyanidin-rich phenolic extracts, such as those from grape seeds or pine bark. As monohydroxyphenolic structures and A-type linkages have been related to antiviral effects, particularly through the inhibition of late transcription, we suggest that the fraction of C. nictitans extract exerts its action through a particularly effective combination of proanthocyanidins that include these two structural features.


Palabras clave

LC–ESI–MS/MS, Chamaecrista nictitans, Polyphenol, Proanthocyanidin, Free radical scavenging activity, Antiviral activity, VIROLOGY