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MRNA levels of TGF-β1 and CTGF detected by RT-PCR. Levels of TGF-β1 and CTGF mRNA in the AS group were up-regulated compared with the control group, and the mRNA levels increased with the increasing severity of AS. M – marker; 1 – control group; 2 – mild stenosis group; 3 – moderate stenosis group; 4 – severe stenosis group
