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Cell viability of MSCs after P7C3 or Isx9 treatment. Cell viability was assessed by MTT assay at 0, 1, 2.5, 5, 10, and 20 µM for (A) P7C3 treatment for 48 h, and at 0, 0.25, 0.50, 1, 2.5, and 5 µM for (B) Isx9 treatment for 48 h. Data were shown as mean ± S.D. with different lower-case letters, and are significantly different at p < 0.05.
