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Isochondodendrine and 2-norcocsuline: additional alkaloids from Triclisia subcordata induce cytotoxicity and apoptosis in ovarian cancer cell lines

Ijeoma Uche, Fidelia; Abed, Mohammed N.; Abdullah, Marwan I.; Drijfhout, Falko P.; McCullagh, James; Claridge, Timothy W.D.; Richardsona, Alan; Li, Wen-Wu

Isochondodendrine and 2-norcocsuline: additional alkaloids from Triclisia subcordata induce cytotoxicity and apoptosis in ovarian cancer cell lines Thumbnail


Authors

Fidelia Ijeoma Uche

Mohammed N. Abed

Marwan I. Abdullah

James McCullagh

Timothy W.D. Claridge

Alan Richardsona



Abstract

Triclisia subcordata Oliv (Menispermeaceae) is used in herbal medicine for the treatment of cancer and other diseases in Africa. This study aims to isolate minor alkaloids present in this plant and assay their cytotoxic activities. Isochondodendrine and 2[prime or minute]-norcocsuline as two minor alkaloids together with the abundant cycleanine were isolated and identified by mass spectrometry and NMR spectroscopy. Both isochondodendrine and 2[prime or minute]-norcocsuline exhibited in vitro cytotoxicity in four ovarian cancer cell lines (A2780, IGROV-1, OVCAR-8, and OVCAR-4) with IC50 ranges of 3.5-17 [small mu ]M and 0.8-6.2 [small mu ]M respectively. These alkaloids showed mostly slightly weaker potencies when tested using normal human ovarian epithelial cells, IC50 = 10.5 +/- 1.2 [small mu ]M and 8.0 +/- 0.2 [small mu ]M for isochondodendrine and 2[prime or minute]-norcocsuline, respectively. The alkaloids induced apoptosis in ovarian cancer cells because they activated caspases 3/7, induced cleavage of PARP, increased the subG1 population in cell cycle analysis and increased Annexin V/propidium iodide staining. These observations suggest that isochondodendrine and 2[prime or minute]-norcocsuline contributing to the cytotoxic activity of T. subcordata may be suitable starting points for the future development of novel therapeutics to treat ovarian cancer.

Acceptance Date Sep 5, 2017
Publication Date Sep 12, 2017
Publicly Available Date Mar 28, 2024
Journal RSC Advances
Print ISSN 2046-2069
Publisher Royal Society of Chemistry
Pages 44154 -44161
DOI https://doi.org/10.1039/C7RA08032H
Publisher URL http://dx.doi.org/10.1039/C7RA08032H

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