Ovarian carcinoma(OC)is the most lethal malignant tumor among all gynecological tumors.Due to its low early diagnosis rate and high chemotherapy resistance,the mortality rate of OC has been high.Circular RNA(circRNA)is a kind of non-coding RNA that exists in various tissues and cells.Owing to the specific molecular structure,circRNAs are generally highly stable.In recent years,the roles of circRNAs in tumor diagnosis and treatment has become a research hotspot,including OC related circRNAs.circRNAs regulate gene expression at the transcriptional and post transcriptional level,indicating that circRNAs play an important role in the genesis and progression of tumors.Therefore,circRNAs are expected to be a potential diagnosis or prognosis marker for OC.This article will summarize the roles of circRNAs in the occurrence and development of OC and review the research progress of circRNAs in the diagnosis and treatment of OC.

Objectives: To explore the differences in signal pathway and gene expression related to the pathogenesis of congenital microtia by the in-depth analysis of DNA methylation profiling of auricular chondrocytes from congenital microtia patients. Methods: Genome wide methylation profile of congenital microtia was obtained by MeDIP chip technology, and analyzed by Gene ontology (GO) and Pathway analysis. The gene expression levels of Wnt1 and Wnt11 were evaluated by Real-time PCR in the auricular cartilage from the healthy side and affected side of the congenital microtia patients , and healthy controls. Results: The GO and Pathway assay showed that Wnt signal pathway was enriched in differential methylated levels. The Wnt1 and Wnt11 genes were with higher methylation in the promoter region and CpG islands in healthy control group than that in microtia group, in addition the methylation level in the affected side auricular cartilage was lower than that in the healthy side. There was no difference in Wnt1 and Wnt11 gene expression in microtia patients and healthy controls. The higher Wnt11 gene expression was detected in the affected side residual cartilage tissues than in the healthy side cartilage tissues of the same congenital microtia patient. Conclusions The over expression of Wnt11 during embryonic development might be associated with the pathogenesis of congenital microtia. The mechanism of the difference in methylation levles of Wnt11 affecting pathogenesis of congenital microtia needs further research.