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Indian J Clin Biochem. 2019 Jul;34(3):324-329. doi: 10.1007/s12291-018-0752-z. Epub 2018 Apr 11.

Psidium guajava Leaf Extracts and Their Quercetin Protect HepG2 Cell Lines Against CCL4 Induced Cytotoxicity.

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Department of Biochemistry, M.I.E.T. Arts and Science College, Tiruchirappalli, Tamil Nadu 620 007 India.
2Department of Animal Science, Centre for Pheromone Technology, Bharathidasan University, Tiruchirappalli, Tamil Nadu India.
3Department of Biotechnology, Yeungnam University, Gyeongsan, Republic of Korea.
4Centre of Excellence in Genomic Medicine Research, King Abdul Aziz University, P.O. Box 80216, Jeddah, 21589 Kingdom of Saudi Arabia.
5King Fahd Medical Research Centre, King Abdul Aziz University, P.O. Box 802160, Jeddah, 21589 Kingdom of Saudi Arabia.
6Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, Tamil Nadu 641 046 India.


The present study was carried out to evaluate the in vitro cytoprotective effects of Psidium guajava and their isolated quercetin fraction to reduce the CCl4 (carbon tetrachloride) induced toxicity in HepG2 cell lines (Hepatocellular carcinoma G2). Silymarin was used as a standard drug to compare the protective effects of plant extracts in infected cell lines. MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide) assay, cell viability assay, leakage parameters [Aspartate aminotransferase (AST), Alanine aminotransferase (ALT) and Lactate dehydrogenase (LDH)], lipid peroxidation and reduced glutathione (GSH) levels were used to find out the protection of human derived HepG2 cells against CCl4-induced damage. The levels of cytotoxicity, viability and GSH were reduced. While the activities of AST, ALT, LDH and lipid peroxidation was increased in CCl4-treated groups. The treatment of P. guajava and their isolated quercetin fractions (100, 200, 300 µg/mL) decreased the elevated levels of all these parameters. The results of the present study suggest that the ethanolic extract of P. guajava leaf and their isolated quercetin fractions can able to reduce the CCl4-induced cytotoxicity in HepG2 cell lines.


Alanine aminotransferase and Lactate dehydrogenase; Aspartate aminotransferase; Carbontetrachloride; Hepatocellular carcinoma G2; Psidium guajava; Silymarin

[Available on 2020-07-01]

Conflict of interest statement

Conflict of interestThe authors declare no conflict of interest.

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