MCL1 and neoplasm: In this study, we transfected OE-NC, OE-circMTO1, OE-circMTO1 + si-NC, and OE-circMTO1 + si-MCL1 into human granulosa-like tumor cells, we found that the downregulation of MCL1 reversed the effects of circMTO1 on human granulosa-like tumor cell proliferation and apoptosis.