Fingerprinting of strong spermatogenesis steroidal saponins in male flowers of Phoenix dactylifera (Date Palm) by LC-ESI-MS

HAMEDA, A.; BEN SAID, R.; AL-AYEDB, A.; MOLDOCHF, J.; PEREZ, A.; STOCHMALF, A.:
Natural Products Research, 4, 1-8 (2016).

DOI: 10.1080/14786419.2016.1274887

Abstract

A fingerprint of steroid saponins, the major constituent in 80% methanolic fraction from the male flowers of Phoenix dactylifera has been established. Under ESI-MS/MS conditions, the fragmentation patterns of [M − H] ions exclusively displayed signals corresponding to the cleavage of the glycosidic bonds, thus allowing a rapid identification of 21 steroidal saponins. Moreover, two unique among them conjugated with histidine were detected by LC-ESI (-)-MS and DFT and were given tentative names of 3-o-histidine-26-o-hexosyl-dioscin and 3-o-histidine-26-o-dihexosyl-hydroxydioscin. Their steroidal saponins exhibited a significant improvement of the sperm cells count, motility and viability in male rats. These effects could be attributed to enhancing the levels of sex hormones.

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