Huang Lian for ulcerative colitis A protocol of systematic review and meta-analysis of randomized clinical trials

Introduction: Ulcerative Colitis is a chronic nonspecific inflammatory disease of the colon and rectum, which is of global concern. It has the characteristics of a long course of disease and repeated attacks, which seriously affects the quality of life and economic and social development of the affected population. The treatment of UC by herb Huanglian and compound prescription contain Huanglian have been proved. However, due to the lack of evidence, there is no specific method or suggestion, it is necessary to systematically evaluate coptidis so as to provide effective evidence for further research. Methods and analysis: The following databases will be searched from their inception to June 2020: Electronic databases included PubMed, Embase, Cochrane Library, Web of Science, Nature, Science Online, WanFang China Biomedical Database, VIP Medical Information, CNKI (Knowledge Infrastructure of China). Main outcomes: Colonoscopy, improved condition (tenesmus), stool routine. Additional outcomes: Electrocardiogram (ECG), erythrocyte (RBC), leukocyte (WBC), platelet (PLT). Data will be extracted by 2 researchers independently, risk of bias of the meta-analysis will be evaluated based on the Cochrane Handbook for Systematic Reviews of Interventions. All data analysis will be conducted by data statistics software Review Manager V.5.3. and Stata V.12.0. Results: The results of this study will systematically evaluate the efficacy and safety of rhizoma coptidis intervention in patients with Ulcerative Colitis. Conclusion: Through the systematic review of this study, the published evidence of rhizoma coptidis on the treatment of UC is summarized so as to further guide its promotion and application. Ethics and communication: This study is a systematic review, the outcomes are based on the published evidence, so examination and agreement by the ethics committee are not required in this study. We intend to publish the study results in a journal or conference presentations. Open Science Fra Mework (OSF) Registration Number: August 27, 2020. osf.io/7nh3k osf.io/7nh3k(https://osf.io/7nh3k).