AU - Doustar, Yousef AU - Mohajeri, Dariush AU - Fathiazad, Fatheme AU - Namvaran, Ali TI - Study of apoptosis induced by Calendula officinalis extract on experimental colon carcinoma in rats PT - JOURNAL ARTICLE TA - iau-tmuj JN - iau-tmuj VO - 20 VI - 1 IP - 1 4099 - http://tmuj.iautmu.ac.ir/article-1-275-en.html 4100 - http://tmuj.iautmu.ac.ir/article-1-275-en.pdf SO - iau-tmuj 1 ABĀ  - Background: In vitro studies have demonstrated the anticancer effect of Calendula officinalis extract on tumor cell line derived from colorectal cancers. The inhibition ranged from 70-100%. The aim of this study was to evaluate the apoptosis in epiththelial displastic colon cells following treated with Calendula officinalis extract. Materials and methods: In this experimental study, 56 wistar male rats with age of 12 weeks and 200-300g weight were allocated into two equal groups of treatment and control. For induction of colorectal carcinoma, these two groups were given 1,2-dimethylhydrazine (40mg/kg), as subcutaneous injection, twice a week for two weeks. Treatment group also was treated with Calendula officinalis extract (200mg/kg/day) orally for 10 weeks. After 10 weeks, distal parts of colon tissue were biopsied in both groups and 3-4 micron tissue section was prepared through TUNEL staining method. Results: Immunohistopathological study reveals that apoptotic cells of displastic colon epithelial cells in treatment group were higher than control group. Mean difference between treatment and control groups were statistically significant (p CP - IRAN IN - Assistant Professor, Department of Pathobiology, Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran LG - eng PB - iau-tmuj PG - 1 PT - YR - 2010