Research Article | Volume: 4; Issue: 11, November, 2014

In vitro hepatotoxcity of Catha edulis Forsk. (khat) phenolic-rich extract on human hepatocytes

Manal Mohamed Elhassan Taha Siddig Ibrahim Abdelwahab Rashad Al-sanousi   

Open Access   

Published:  Nov 27, 2014

DOI: 10.7324/JAPS.2014.4118

In our previous research, Khat has been shown to be associated with hepatic hypertrophy and hepatotoxicity in male and female SD-rats. However, no in vitro studies have been previously done to test on hepatotoxicity of khat on human experimental models. In vitro toxicological evaluation system plays an important role in the early phase of pharmaceutical development and drug safety. Therefore, the current study was designed to examine the in vitro hepatotoxic effect of phenolic-rich extract of khat (Catha edulis Forsk.). Khat was randomly collected from different places in Yemen [Dhamar (DMR), Ibb (IB), Taiz (TZ) cities] and Ethiopia (HAR). Phenolic-rich extraction was performed using 60% methanol. The effects of khat on HepG2 human hepatocyte cell line were measured using the MTT assay. HepG2 cells are a suitable in vitro model system for the study of human hepatocytes. The potency of cell growth inhibition for khat was expressed as an IC50 value. Cellular proliferation following 24h of exposure to khat samples showed considerable inhibition in khat-treated cells compared to non-treated cells (controls). The IC50 values of DMR, IB, TZ and HAR were 5.1±0.03, 15.3±0.12, 10.2±0.20 and 8.7±0.47 μg/mL, following 24 h of treatment, respectively. The proliferation of khat-treated cells decreased as the khat concentration increased. The method used appears to be a useful and reproducible technique for the in vitro assessment of the khat-induced cytotoxicity in a human liver cell line. Further studies are recommended to understand the molecular mechanism of Khat induced HepG2 cytotoxicity.

Keyword:     Khat (Catha edulis F.)phenolic compoundsAntioxidative activityHepG2 cells.


Manal Mohamed Elhassan Taha, Siddig Ibrahim Abdelwahab, Rashad Al-sanousi. In vitro hepatotoxcity of Catha edulis Forsk. (khat) phenolic-rich extract on human hepatocytes. J App Pharm Sci, 2014; 4 (11): 042-046.

Copyright:The Author(s). This is an open access article distributed under the Creative Commons Attribution Non-Commercial License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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