Tranilast as a Radiosensitizer in Reradiation of Nasopharyngeal Carcinoma

Nasopharyngeal carcinoma is one of the high incidence head and neck cancer in Southeast Asia. Radiotherapy is the main treatment for nasopharyngeal carcinoma, and its response rate can reach 80~90%. However, for radiotherapy resistant patients with metastasis and recurrence, the survival prognosis decreased significantly, and the 5-year overall survival rate was only 20% - 40%. Tranilast is an anti-allergic drug, which is clinically used to treat bronchial asthma and can inhibit fibroblasts α- SMA and type I collagen expression. Through experiments in vivo and in vitro, the investigators' research group has proved that Tranilast can inhibit the activity of tumor related fibroblasts, reduce the radiotherapy resistance of nasopharyngeal carcinoma, and has the radiosensitizing effect of nasopharyngeal carcinoma. This result has been published in J exp Clin cancer res (if=11.16). The investigators plan to carry out the clinical transformation of basic research, carry out a prospective intervention phase II clinical trial, compare the objective remission rate of patients with recurrent nasopharyngeal carcinoma treated with previous radiotherapy, and explore the safety and effectiveness of using Tranilast as a radiotherapy sensitizer for radiotherapy to resist the treatment of nasopharyngeal carcinoma.

Inclusion Criteria:Sign informed consentAt least 18 years old on the date of signing the informed consentPreviously received standard radical radiotherapy and chemotherapyRecurrent nasopharyngeal carcinoma in situ or cervical lymph nodes confirmed by pathological biopsy and imaging examinationAfter multidisciplinary consultation, there was a clear indication for surgery, and the patient was informed and refused to accept surgical treatment 6）ECOG PS：0/17) Laboratory examination confirmed good organ function, which should be carried out within 10 days before the first treatment.Exclusion Criteria:After evaluation, it does not meet the indications of re-radiotherapyunable to take oral medicationPregnancy or lactationKnown allergy to TranilastPatients who are judged by the researcher as unsuitable to participate in this trial