Hajer S Alorfi1 
,
Mohamed A Ghandourah2,
Adnan J Turki2
For correspondence:- Hajer Alorfi Email: halorfi@kau.edu.sa
Accepted: 26 February 2020 Published: 31 March 2020
Citation: Alorfi HS, Ghandourah MA, Turki AJ. Cytotoxic effect of acetogenins and sesquiterpenes obtained from the Red alga Laurencia majuscula. Trop J Pharm Res 2020; 19(3):583-586 doi: 10.4314/tjpr.v19i3.18
© 2020 The authors.
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Purpose: To evaluate the cytotoxicity of n-hexane extract and its metabolites obtained from the red alga, Laurencia majuscula, against three cancer cell lines HCT-116 (colon cancer), PC-3 (prostate cancer) and HepG2 (liver cancer) cells; and to identify the phytochemical compound(s) involved.
Methods: Solvent extraction, thin layer chromatography, aluminum oxide column chromatography, and preparative thin layer chromatography (PTLC) were employed for isolating pure compounds from n-hexane extract of Laurencia majuscula. Nuclear magnetic resonance (NMR) and mass spectrometry (MS) measurements were used for structural elucidation of the compounds. The cytotoxicity of the non-polar extract and isolated compounds were evaluated against HCT, PC-3, and HepG2 cells using MTT assay, relative to the standard cytotoxic drug (cisplatin).
Results: Three sesquiterpenes (1, 2 and 8), and five acetogenins (3-7) were isolated from the n-hexane extract. The n-hexane extract showed higher potent cytotoxic effect than sesquiterpenes and the acetogenins (3-7).
Conclusion: These results indicate that the n-hexane extract of Laurencia majuscula exerts significant cytotoxicity against HCT-116, PC-3 and HepG2 cell lines, thus suggesting that the plant extract may be effective chemotherapeutic agents for the management of colon, postrate and liver cancer.
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