As previously described [17 (link), 21 (link)], total RNA from chondrocytes and cartilage tissues was extracted using TRIzol (CW Biotech, Beijing, China). RT-qPCR was performed after reverse transcription as per the protocol provided with the miRNA reverse transcription kit (TaKaRa, Japan). β-Actin levels were used as the internal reference. Relative miRNA expression was calculated using the 2−ΔΔCt method. Table 1 lists the sequences for the used.
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