“…T hy m o q u i n o n e ( 2 -i s o p ro py l -5 -m e t hy l -1 , 4 -benzoquinone) (Figure 1) is the main bioactive component of the volatile oil of the medical plant Nigella sativa (Black seed), and it has been shown to excrete anticancerous, antioxidant and anti-inflammatory activities both in vitro and in vivo (Worthen et al, 1998;Kaseb et al, 2007;Mansour et al, 2002;Chehl et al, 2009). Many previous reports have shown promising antitumor characteristics of thymoquinone (TQ) against different types of cancer cell lines in vitro, including human colorectal cancer cells (Gali-Muhtasib et al, 2004), myeloblastic leukemia cells (El-Mahdy et al, 2005), prostate cancer (Kaseb et al, 2007), pancreatic adenocarcinoma (Worthen et al, 1998) and ovarian and breast adenocarcinoma (Shoieb et al, 2003).…”