Taiwan to join global oral cancer immunotherapy clinical trials

2011/10/12 (CNA) Taiwan will join the global clinical trials of biopharmaceutical drug developed to treat oral cancer, one of the participating hospitals said Wednesday. Eight countries including the United States (U.S.) and Canada, will be taking part in simultaneous phase III clinical trials starting this month, said Hao Sheng-po, chief of Otolaryngology at Shin Kuang Wu Ho-Su Memorial Hospital. Eight hundred patients worldwide, including 88 in Taiwan will be participating in the trials. Biopharamaceuticals are drugs manufactured though the use of live organisms or their active components and work by boosting the human immune system. Examples of these drugs include insulin and vaccines. The importance of the new clinical trials is that it will change the role of immunotherapy from an aid and last resort in cancer therapy to first-stage treatment, Hao said. In the trails, immunotherapy in the form of biopharmaceutical injections will be administered to 88 cancer patients with oral tumors, Hao said. The aim is to strengthen the immune system against cancer before turning to traditional forms of therapy such as surgery, chemotherapy, radiotherapy and targeted therapy, he explained. The survival rates of the patients in the trials will be tracked, he said. Only patients with late third or fourth stage of oral cancer or those have not received chemotherapy will be allowed to participate in the clinical trials, he said. This is because it has been found in previous research that immunotherapy tends to fail in patients who have already received traditional cancer treatments, he said. In such cases, immunotherapy drugs are less effective because the patients'immune systems have been battered by surgery, chemotherapy and radiotherapy, he added. In the phase II clinical trials of the biopharmaceuticals, it was found that on average the treatment helped reduce the size of tumors in oral cancer patients by 50 percent. In 12 percent of the cases, the tumors disappeared after one month of treatment. The overall survival rate among the patients in the trial increased by 33 percent over a period of 3.5 years compared with the control group. No poisoning or autoimmune disorders were observed in the first two phases of the clinical trials, and other studies have indicated that the biopharmaceutical drug were found to also be capable of suppressing cervical cancer.