Mechanism of Curcumin Alone and in Combination with Other Drugs Against Laryngeal Carcinoma： A Review / 中国实验方剂学杂志

Curcumae Longae Rhizoma is a traditional Chinese medicine with the efficacy of activating blood and moving Qi. Curcumin， a polyphenolic substance extracted from the rhizome of plant Curcuma longa， possesses multiple pharmacological activities like anti-tumor， anti-oxidation， anti-bacteria， and anti-inflammation. Laryngeal carcinoma （LC） is a common malignant tumor， whose incidence in recent years has been on the rise， and the 5-year survival rate has continuously decreased. Considering the specific location of larynx， researchers are actively exploring diverse treatment modalities for laryngeal organ preservation. Many studies have shown that curcumin has an inhibitory effect on the development of LC. By virtue of multiple pharmacological effects， curcumin deserves to be thoroughly explored. However， most of the current research is limited to in vitro exploration， and the partial mechanism of curcumin remains unclear， indicating that there is still a long way to go before curcumin becomes a Chinese medicinal preparation for the clinical treatment of LC. This paper reviewed the physicochemical properties of curcumin and the methods for its extraction from plants， the efficacy of curcumin in inducing cell apoptosis and protective autophagy， reversing cell drug resistance， inhibiting cell proliferation， migration， and invasion and tumor angiogenesis， the action mechanism of curcumin in combination with resveratrol， platinum drugs， 3-methyladenine， taxols， and 5-fluorouracil against LC， as well as the bioinformatics analysis concerning curcumin and LC. This paper is expected to provide reference for relevant researchers to clarify the mechanism and important targets of curcumin against LC and promote its clinical application.

Apoptosis mechanism of taxol combined with resveratrol on human laryngeal carcinoma Hep-2 cells / 中国中药杂志

Laryngeal cancer is one of the most common malignant tumors in the respiratory tumors, and its incidence ranks second highest in the respiratory tumors. Resveratrol (Res) is a kind of polyphenols, which can inhibit nucleotides can inhibit the growth of liver cancer cells, gastric cancer cells, pancreatic cells and other tumor cells by inhibiting ribonucleotide reductase in the cells. Taxol (Tax) is a kind of secondary metabolites of Taxus chinensis, which has anti-tumor activity for breast cancer, cervical cancer, ovarian cancer and other tumors by inhibiting cellular microtubule depolymerization. But at present the effects of resveratrol combined with taxol on human laryngeal carcinoma cell strain Hep-2 and their underlying molecular mechanisms are rarely reported. After human laryngeal cancer cell Hep-2 cells were processed with resveratrol (Res) and taxol (Tax), CCK-8 assay was used to evaluate the effect of these two herbs on the proliferation of cancer cells; AO/PI staining and JC-1 were used to detect Hep-1 cells apoptosis; the expression of Bax, Bcl-2, PARP, TRIB3, and XIAP genes was detected by real time quantitative PCR; the activity of caspase-3 and caspase-8 was determined with quantitative fluorescence method. The experimental results showed that compared with Tax, Res medication alone, joint group significantly enhanced inhibition of Hep-2 cells activity, decreased the dosage of Tax, increased the expression of Bax and PARP, TRIB3, reduced the expression of the Bcl-2 and XIAP, and promoted the activity of caspase-3 and caspase-8. The test results showed that compared with the single medication, combined group could significantly increase the inhibitory effect on Hep-2 cells, significantly reduce Tax dosage, increase expressions of Bax, PARP, TRIB3, reduce expressions of Bcl-2, XIAP, and promote activity of caspase-3, caspase-8. This indicated apoptosis of human laryngeal carcinoma cell strain Hep-2 may be induced with Res, Tax, and the combination of these two herbs by mitochondria pathway. It provides valuable clue for further research on combination of Res and Tax for the treatment of laryngeal cancer, and expanding the combined application of Res and Tax.

Anti-metastasis of celastrol on esophageal cancer cells and its mechanism / 生理学报

Celastrol is a quinone methyl terpene extracted from the traditional Chinese medicine Tripterygium wilfordii, which has anti-inflammatory, immune suppression and pharmacological activities, as well as anti-tumor activity. The effects of celastrol on adhesion, migration and invasion of esophageal cancer cells were investigated in this experiment. Human esophageal cancer cell line ECA-109 was used. The inhibition of ECA-109 cells' adhesion induced by celastrol was measured by MTT test. The inhibition of ECA-109 cells' migration induced by celastrol was measured by scratch test. The invasion inhibition of ECA-109 cells induced by celastrol was measured by Transwell experiment. Quantitative real-time PCR and Western blot were used to determine the effects of different concentrations of celastrol on integrin family and Wnt signaling pathway in ECA-109 cells. The results showed that celastrol inhibited adhesion, migration and invasion of ECA-109 cells and expressions of integrins β1, β4, αv and β-Catenin, LRP6 in Wnt signal pathway in a dose-dependent manner. Therefore the study suggests that celastrol could inhibit the cell metastasis of esophageal cancer by inhibiting the Wnt signaling pathway and the expressions of integrins.

Effect of celastrol in inhibiting metastasis of lung cancer cells by influencing Akt signaling pathway and expressing integrins / 中国中药杂志

Celastrol is a type of quinone methyl triterpene isolated from traditional Chinese medicine Tripterygium wilfordii, with pharmacological activities, like anti-inflammatory, immunosuppression and anti-tumor. This study focused on the effects of celastrol on adhesion, migration and invasion of lung cancer cells. The migration inhibition of lung cancer cells induced by celastrol was detected by the scratch test. The invasion inhibition of lung cancer cells induced by celastrol was measured by the transwell experiment. RT-PCR and Western blot were used to determine the effect of different concentrations of celastrol in integrin family and Akt signaling pathway in lung cancer cells. The results showed that celastrol inhibited adhesion, migration and invasion of lung cancer cells and expressions of integrins β3, β4, αv and phosphorylated Akt, GSK-3β, c-Raf, PDK1 in Akt signal pathway in a dose-dependent manner. Therefore, the study implies that Celastrol could inhibit the metastasis of lung cancer cells by suppressing Akt signaling pathway and expression of integrins.