Freshly frozen tissues (≤30 mm3) were homogenized using the MagNA Lyser Instrument (Roche, Basel, Switzerland; 03358968001) and MagNA Lyser Green Beads (Roche; 03358941001). Total RNA from freshly frozen tissues and endometrioid adenocarcinoma cells was isolated using the RNeasy Mini Kit (Qiagen, Hilden, Germany; 74104), and complementary DNA was synthesized from genomic DNA-purified RNAs using qPCR-RT Master Mix with gDNA Remover (TOYOBO, Osaka, Japan; FSQ-301). The mRNA expression was measured using KOD SYBR qPCR Mix (TaKaRa Bio, Shiga, Japan; QKD-201X5) and QuantStudio 1 Real-Time PCR System (Thermo Fisher Scientific; A40425). Relative gene expression was analyzed using the 2−ΔΔCt method. The primer sequences for RT-qPCR are listed in Table S2. The experiment was performed in triplicate [24 (link)].
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