Protective effects of black Iranian tea on cadmium- induced hepatotoxicity in rats

Subject Areas : Journal of Comparative Pathobiology

M.R Mohammadi Malayeri, ¹ , سعید Hesaraki, ² , پیام Jamal livani, ³

1 - ندارد
2 - ندارد
3 - ندارد

Received: 2014-05-16 Accepted : 2014-09-10 Published : 2015-01-21

Keywords: Hepatotoxicity, Cadmium, Black tea, Rat,

Abstract :

Useful effects of black tea in treatment of many diseases have been shown . the protectiveeffects of tea are possibly related to its antioxidant properties or its inhibition of lipidoxidation. The aim of the present study was to investigate hepatoprotective effects of blackIranian tea on cadmium(cd)-induced hepatotoxicity .For this purpose 30 male wistar rats wererandomly divided to six study groups including 1-negative control, 2-treatment control (received10% black tea brewed drink (BTBD)),3-positive control which received cd(5 mg/kg bodyweight (bw.)/day) and 4 to 6-treatment groups in which BTBD was administered orally (2,5 and10%) with oral cd(5mg/kg bw./day). The rats were sacrificed after 4 weeks and blood sampleswere collected to assess liver biomarkers. liver samples were fixed in buffered formalin solution. They were then conventionally embedded in paraffin and stained with Hematoxilin - Eosin forpathology studies as well. In positive control group, activities of alanine transaminase(ALT),aspartate transaminase(AST) and alkaline phosphatase (ALP) significantly increased in comparewith negative control group. Granular degeneration, chromatin and nucleus concentration andnecrosis were evidenced in pathological study of the liver sections of this group. On the otherhand, 5 and 10% BTBD administration significantly prevented ALT,AST and ALP increasingactivity. Pathological study confirmed the latter serological results. Whereas, 2% BTBDadministration didn't have any significant protection. in conclusion, our results suggest that dailyblack tea drinking may prevent cd-induced hepatic lesions.