Abstract. Liver cancer is the fifth most common malignancy worldwide. Liver YIN deficiency is a common clinical syndrome of traditional Chinese medicine in liver cancer. Yi Guan Jian is an ancient classic liver YIN tonifying herbal formula used for the treatment of liver disease with liver YIN deficiency, which is also currently used for liver cancer treatment. However, as an ancient formula, Yi Guan Jian (YGJ) is not entirely suitable for liver cancer treatment. In the present study, we optimized the prescription of YGJ according to the current principles of Chinese herbal medication, and evaluated the anticancer effects of modified Yi Guan Jian (MYGJ) in Bel-7402 human hepatocarcinoma cells. The results show that MYGJ inhibited the growth of Bel-7402 cells in adherent or in suspension cultures, and was more effective in Bel-7402 cells in suspension. MYGJ also inhibited anchorageindependent growth of Bel-7402 cells in soft agar. MYGJ induced anoikis in Bel-7402 cells accompanied by caspase-3, -8 and -9 activation, which was blocked by the pan-caspase inhibitor, Z-VAD-FMK. Furthermore, MYGJ inhibited the expression and phosphorylation of p38 MAPK in Bel-7402 cells. These findings suggest that MYGJ is sufficient to induce caspase-mediated anoikis in Bel-7402 cells in vitro, and may be associated with down-regulation of p38 MAPK. The present study also provides insight into the application of ancient Chinese herbal formulas.
IntroductionLiver cancer is the fifth most common malignancy worldwide and the second most common cause of death from cancer (1). The incidence of liver cancer is increasing due to the dissemination of hepatitis B and C virus infections, and the highest incidence has been recorded in East and SouthEast Asia and in Middle and Western Africa (1,2). Currently, the treatment of hepatic carcinoma is mainly dependent on early surgical resection, liver transplantation, chemoembolization, and targeted therapy (2,3). However, most patients present with middle or advanced stages at diagnosis and not amenable to loco-regional therapy, due to the latent onset and rapid progression (3,4). Treatment of middle-advanced stage liver cancer is difficult because of relatively few therapeutic responses and survival benefit. In addition, the overall efficacy of recently approved targeted therapy (sorafenib) remains moderate (5). It is important to develop novel therapeutic methods to treat liver cancer.In China, traditional Chinese medicine has been widely used in all aspects of integrative therapy in liver cancer, including surgery, liver transplantation, chemoembolization, targeted therapy, and even treatment alone for middle-advanced stage liver cancer (6-9). It has been reported that traditional Chinese medicine may help to delay tumor progression, improve quality of life, and prolong survival in liver cancer patients (6-9). The deficiency of liver-YIN is a common clinical syndrome of traditional Chinese medicine in liver cancer, especially in middle-advanced stage liver cancer (10,11). Yi Guan Jian (YGJ), a c...