Saudi Journal of Biomedical Research (SJBR)
Volume-3 | Issue-02 | 50-55
Original Research Article
Comparative Study of Antioxidant Activity and Hepato-Protective Effect of Extracts of Tetracarpidium conophorum and Dacryodes edulis on Sodium Arsenate Exposed Rats
Uhunmwangho ES, Omoregie ES
Published : April 17, 2018
Abstract
This study comparatively evaluated the in vitro antioxidant activity and
the hepato-protective effect of extracts of two locally consumed fruits, Dacryodes
edulis (African pear) and Tetracarpidium conophorum (African walnut) in sodium
arsenate exposed rats. Antioxidant activity was determined by spectrophotometric
methods using 2, 2-diphenyl-2- picrylhydrazyl (DPPH) radical, hydrogen peroxide
(H2O2) and malondialdehyde (MDA) assays. Total phenol, flavonoids and
anthocyanins content of extracts were also determined. Results from the study
indicated that DPPH and H2O2 scavenging capacity as well as percentage inhibition
of MDA were significantly higher (P˂0.05) in extract of T. conophorum (48.34%,
46.9% and 53.5%, respectively) when compared with D. edulis extract (45.47%,
18.1% and 45.3%, respectively). The anthocyanins content was significantly higher
(P˂0.05) in D. edulis extract than in T. conophorum. Whereas, T. conophorum
extract recorded higher phenol content (52.3GAE/100g) compared with D. edulis
extract (22.5GEA/100g). The flavonoids content of T. conophorum extract was
comparable to that of D. edulis. The hepato-protective effects of the extracts were
examined in vivo in male Wister rats challenged with sodium arsenate. Results
showed that the rats fed with the two extracts had significant reduction (p<0.05) in
lipid peroxidation, increase in SOD and catalase activities relative to control values.
These results suggest that rat fed with Dacryodes edulis and Tetracarpidium
conophorum extracts possess varied degree of potent antioxidant activity and may
serve as important sources of antioxidants in food, cosmetics and pharmaceutical
industries.