15 They found that CDCA and UDCA had no effects on the growth of malignant cells, but the synthetic derivatives showed a weak to completely inhibitory activity on tumoral cells. They believed that the proliferation-inhibitory effect arrested the cell cycle progression at the G1 phase and induced apoptosis.15 We found a similar result that the cytotoxic effect of crude bile was mediated by apoptosis. However, the effects of different natural or synthetic bile acids were not evaluated in our study. On the other hand, the bile acids were considered as carcinogen in the gastrointestinal system. In Barrett’s epithelial

cells, DCA induced reactive oxygen/nitrogen species (ROS/RNS) production, which caused genotoxic Inhibitors,research,lifescience,medical injury, induced the activation of the NF-κB Inhibitors,research,lifescience,medical pathway and ultimately enabled cells with DNA damage to resist apoptosis.7 How specific

bile acids promote neoplasia is yet unknown. The effects of different bile acids are not similar and the combination of bile subtype with appropriate pH and exposure time are critical.6,7 PH can alter bile acid activity. Glycine-conjugated bile acids are involved in neoplastic development at acidic pH (pH~4), and unconjugated bile acids are involved in neoplastic development at a more neutral pH (~6).7 DCA and LCA had tumorigenic effects, whereas UDCA has been efficiently used as a cytoprotective Inhibitors,research,lifescience,medical agent.10 Ursodeoxycholic acid Inhibitors,research,lifescience,medical inhibits mitogenic signaling and suppresses cell proliferation in colonic tumorigenesis. UDCA protects cells from p53-mediated apoptosis by promoting its buy IKK Inhibitor VII degradation via the Mdm-2-ubiquitin-proteasome pathway.16 Therefore, the bile and bile acids had broad spectrum activity from carcinogenesis to cytotoxic effect on cancer cells.

This finding was dependent on type of bile acid, exposure time and environmental Inhibitors,research,lifescience,medical pH. Conclusion Bile has dose-dependent cytotoxic effects on HepG2 and CCRF-CEM cell lines. DCA and CDCA are supposed to be responsible for this effect. Furthermore; the observed cytotoxicity appears to be mediated via apoptosis and bile might be applicable to the treatment of various human cancers. Acknowledgment We would like to thank the Transplant Research Center, Shiraz University of Medical Sciences, for providing the grant for this study. Conflict of Interest: None declared
Background: WZ4003 molecular weight In recent years use of family physicians has been determined as a start point of health system reform to achieve more productive health services. In this study we aimed to assess the cost-efficiency of the implementation of this plan in Fars province, southern Iran. Methods: This cross-sectional descriptive study was done in 2007 in 18 provincial health centers as well as 224 rural health centers in Fars province. Data were collected using forms, statistics, and available evidence and analyzed by expert opinion and ratio techniques, control of process statistics, and multi indicator decision model.