Background: Leukemiais a malignant and progressive disease of the Hematopoietic tissues of the body. The pistacia atlantica tree base, the geographic in large areas of the Mediterranean and the Middle East is growing. K562Cell class is considered as laboratory model of chronic phase of human CML. We compared the growth inhibitory effects SUZIN as a chemical compared with pistacia atlantica as a combined Zn plant antioxidant capacity in reducing cancer has been studied.

Materials and Methods: Pistachio nut was collected from around Kerman, then they were dried in room temperature and extraction was performed for 48 hours by maceration method. K562 cell class was incubated in medium RPMI-1640 fortified with 10%(v/v) FBS and 50% Streptomycin-Penicillin. Cytotoxic effect of hydro-ethanolic extract of pistacia atlantica against cancer cells K562 was evaluated in three interval by MTT method. Light absorbance by Eliza device was measured in wave length 540 nm. Statistical analysis was performed using SPSS15 software and ANOVA test.

Results: Pistacia atlantica in 24h and in concentration 100&mug/ml andSuzin in48h and in 12.5 &mug/ml,72 h and in 50 &mug/ml induced growth inhibition half of the cells were K562. Results obtained from changes in cell morphology influenced by hydro-ethanolic extract of pistacia atlantica and SUZIN suggest abnormal transformation of cells that probably represents apoptosis and necrosis.

Conclusion: Time and concentration against cytotoxic effect of Pistacia atlantica have the combined effect. Whileiron supplementation, alone time is due. Special concentration of pistacia atlantica having high antioxidant capacity with the Suzincan be considered as a potential target for inhibiting K562 cells in treatment of blood cancer.