Saffron (Crocus sativus L.) has been an important subject of interest for research teams in the past two decades because of its various biological properties. Chemical analysis has shown the presence of more than 150 components in saffron stigmas. Here, we review the medicinal and industrial applications of saffron. Then, the new findings from different research groups about its medicinal properties and various cellular and molecular mechanisms of action will be discussed. The methods used for this study included searching Web of Science and Medline for saffron and its constituent’s applications. The results show that in recent years saffron’s application in a variety of disorders involving neuronal, cardiovascular and other systems, as well as cancer have been investigated. The cellular and molecular mechanisms of its action are also under study. The more powerful components of saffron are carotenoids and monoterpene aldehydes. Structure-function relationship studies show that some properties are related to deglycosylated derivatives, while others belong to more glycosylated ones. Our study concludes that saffron has a wide range of usefulness in medicine, cosmetics, and coloring industries, so it can be used for new drug designs. However, more research about its mechanism of action is needed.

We previously showed the anticancer property of crocin, a carotenoid isolated and purified from saffron against chemical-induced gastric and breast cancer in rats. In this study, the mechanism of crocin action was investigated in the gastric adenocarcinoma (AGS) cells in comparison with human normal fibroblast skin cells (HFSF-PI3). Crocin revealed a dose- and time-dependent cytotoxic effect against an AGS cell line, as determined by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Crocin-induced apoptosis was evidenced by flow cytometry and measuring caspase activity. The increased sub-G1 population and activated caspases in the treated AGS cells confirmed its anticancer effect. Expression of both Bax and Bcl-2 was determined using a semiquantitative reverse transcriptase–polymerase chain reaction and Western blot in these cells before and after treatment with crocin. Apoptosis was significantly stimulated as indicated by increasing the Bax/Bcl-2 ratio after crocin treatment. All of the above-mentioned parameters remained normal in HFSF-PI3 treated with crocin. These data are providing insight into the molecular mechanisms underlying the crocin-induced apoptosis in the AGS cells, rendering it as the potential anticancer agent.