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si-MTHFD1 regulates the expression of apoptosis-associated factors. (A–D) qRT-PCR was carried to examine the mRNA levels of p53 (A), survivin (B), Bax (C), and Bcl-2 (D). (E) Western blot was used to assess the protein levels of p53 (Ea), survivin (Eb), Bax (Ec), and Bcl-2 (Ed). * P<0.05, ** P<0.01, versus control. @ P<0.05, $ P<0.01, versus empty vector.
