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Background This study will investigate the effect of shikonin on the proliferation and apoptosis of human ovarian cancer cell SKOV3 (HOCC-SKOV3). Methods We will retrieve potential studies from inception to the March 1, 2020 in Cochrane Library, MEDLINE, EMBASE, Scopus, Cumulative Index to Nursing and Allied Health Literature, WANGFANG, and China National Knowledge In-frastructure. There are not restrictions related to the language and publication status. This study will include case-controlled studies (CCSs) or randomized controlled studies (RCSs) that examine the effect of shikonin on the proliferation and apoptosis of HOCC-SKOV3. Two researchers will independently identify literatures, extract data, and appraise study quality. Any disagreements will be resolved by discussion with another researcher. RevMan 5.3 software will be placed to perform statistical analysis. Results This study will summarize the present evidence to test the effect of shikonin on the proliferation and apoptosis of HOCC-SKOV3. Conclusion It will provide evidence to investigate the effect of shikonin on the proliferation and apoptosis of HOCC-SKOV3, and will supply reference for further study.Systematic review registration: INPLASY202040146.

Background: Ovarian cancer (OC) is one of the most leading causes of deaths in the Chinese women. The objective of this protocol is to perform a full-scale systematic review on the efficacy of weekly cisplatin (WC) for the treatment of patients with OC. Methods: Data sources will comprise of PubMed, PsycINFO, Scopus, Opengrey, Cochrane Central Register of Controlled Trials, Embase, Cumulative Index to Nursing and Allied Health Literature, Web of Science, Allied and Complementary Medicine Database, and Chinese Biomedical Literature Database. All relevant randomized controlled trials from searched databases will be identified from their inception to the present. A defined search strategy will be implemented along with eligibility criteria. Relevant data will be extracted according to the predefined data collection form. Methodologic quality will be assessed by using Cochrane risk of bias tool; and data pooled and meta-analysis will be conducted by using fixed-effects, or random-effects model with RevMan 5.3 software. Results: This proposed systematic review will evaluate the efficacy of WC for patients with OC. Conclusion: The findings of this study may summarize the latest evidence for the WC on OC. Ethics and dissemination: Ethical approval is not required for this study, because it will be based on published studies, and existing sources of literature. The results of this study will be disseminated through peer-reviewed journal. PROSPERO registration number: PROSPERO CRD42018120938.