A potent Sperm Motility-Inhibiting Activity of Bioflavonoids From an Ethnomedicine of Onge, Alstonia Macrophylla Wall ex A. DC, Leaf Extract
IR@IICB: CSIR-Indian Institute of Chemical Biology, Kolkata
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| Title |
A potent Sperm Motility-Inhibiting Activity of Bioflavonoids From an Ethnomedicine of Onge, Alstonia Macrophylla Wall ex A. DC, Leaf Extract
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| Creator |
Chattopadhyaya, Debprasad
Dungdung, Sandhya Rekha Mandal, Asit B Majumder, Gopal Chandra |
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| Subject |
Cell Biology & Physiology
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| Description |
The methanol extract (ME) and the n-butanol fractions of methanolic extract of Alstonia macrophylla Wall ex A. DC leaves were investigated on the forward motility (FM) of mammalian (goat and human) spermatozoa. The ME at 600 Ag mL�1 as well as fraction B at 100 Ag mL�1 concentrations showed marked inhibition of sperm FM in both goat and human species when tested by microscopic and spectrophotometric methods. Approximately 60–80% of the goat spermatozoa lost their FM when treated with 600 Ag mL�1 of ME and 100
Ag mL�1 of fraction B. At 100 Ag mL�1 concentration, fraction B showed 90% loss of FM in human spermatozoa, while fraction B at 400 Ag mL�1 concentration showed complete inhibition of sperm FM at 0 min. The inhibitory activity of fraction B increases with increasing
concentration in a dose-dependent manner. Phytochemical study of the extract revealed that the leaf contains tannins, flavonoids, sterols, triterpenes, alkaloids and reducing sugars. Further fractionation and purification of the bioactive n-butanol part of ME showed the presence of
ursolic acid (fraction B), h-sitosterol (fraction A), h-sitosterol glucoside and a mixture of minor compounds (fraction C, detected on thinlayer chromatography). The results reveal that fraction B (ursolic acid), a pentacyclic triterpene, has the potential of sperm motility inhibition and can serve as a topical vaginal contraceptive.
D 2005 Elsevier Inc. All rights reserved.
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| Date |
2005
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://www.eprints.iicb.res.in/1107/1/CONTRACEPTION%2C_71_%2C5___Pages_372%2D378_[65].pdf
Chattopadhyaya, Debprasad and Dungdung, Sandhya Rekha and Mandal, Asit B and Majumder, Gopal Chandra (2005) A potent Sperm Motility-Inhibiting Activity of Bioflavonoids From an Ethnomedicine of Onge, Alstonia Macrophylla Wall ex A. DC, Leaf Extract. Contraception, 71 (5). pp. 372-378. |
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| Relation |
http://dx.doi.org/10.1016/j.contraception.2004.11.006
http://www.eprints.iicb.res.in/1107/ |
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