MKI67 and neoplasm: Consistently, stable transfection of circ‐CUX1 or sh‐circ‐CUX1 #1 into IMR32 cells resulted in a significant increase or decrease in growth, tumor weight, Ki‐67 proliferation index, CD31‐positive microvessels, glucose uptake, lactate production, and ATP levels of subcutaneous xenograft tumors in nude mice (Fig 3C–E).