Immobilising effect of Ruta graveolens L. on human spermatozoa: coumarin compounds are involved

Summary This study was designed to find out Ruta graveolens L. functional components, which have immobilisation effect on human spermatozoa for contraceptive use. A five‐step fractionation method was used to derive different components from rue aqueous extract by using hexane, chloroform, ethanol, a...

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Published in:Andrologia 2015-12, Vol.47 (10), p.1183-1189
Main Authors: Naghibi Harat, Z., Lakpour, N., Sadeghipoor, H. R., Kamalinejad, M., Eshraghian, M. R., Naghibi, B., Akhondi, M. M., Binaafar, S., Sadeghi, M. R.
Format: Article
Language:English
Subjects:
contraception
coumarins
Coumarins - analysis
Coumarins - pharmacology
Gas Chromatography-Mass Spectrometry
Humans
Male
Motility
Plant Extracts - chemistry
Plant Extracts - pharmacology
reproductive pharmacology
Ruta
Ruta graveolens L
Sperm
Sperm Motility - drug effects
spermatozoa
Spermatozoa - drug effects
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Summary:Summary This study was designed to find out Ruta graveolens L. functional components, which have immobilisation effect on human spermatozoa for contraceptive use. A five‐step fractionation method was used to derive different components from rue aqueous extract by using hexane, chloroform, ethanol, acetone and ultrapure water. Gas chromatography–mass spectrophotometery (GC–MS) of all fractions and the aqueous extract were performed to determine the chemical components. The immobilisation assay and membrane integrity test were also performed with four different coumarins, which were found in GC–MS in a concentration of 10 μm. Hexane, chloroform, acetone and ethanol fractions could significantly decrease motility of sperms within the first and the second hours. Hexane fraction had also significant immediate effect. The aqueous fraction had no effect on sperm motility. Meanwhile, GC–MS revealed that aqueous extract and effective fractions had similar coumarin compounds. We performed the immobilisation assay on four different coumarins, which were found in GC–MS in a concentration of 10 μm. Reduction of sperm motility was only significant for xanthotoxin. In the sperm viability and membrane integrity tests, hexane and ethanolic fractions could impair sperm vitality significantly, in contrast to coumarins. These results indicated that a part of immobilising effect of rue could be due to its coumarins. The possible mechanism could be blocking of spermatozoa potassium channels.
ISSN:0303-4569
1439-0272
DOI:10.1111/and.12401