Viability (%) Cell Number (RFU)
  Normal Media Cytotox. Media Normal Media Cytotox. Media
  24 hr. 48 hr. 24 hr. 48 hr. 24 hr. 48 hr. 24 hr. 48 hr.
MCF-12A 71.96 ± 2.11 77.49 ± 0.95 75.83 ± 1.73 67.08c ± 0.68 5040.0 ± 196.1 6514.6a ± 320.5 5326.1 ± 403.3 4993.8c ± 66.1
MDA-MB-453 78.56 ± 0.35 87.03a ± 0.62 83.52b ± 0.46 84.53c ± 0.34 15248.1 ± 73.1 8081.3a ± 311.0 14881.8 ± 76.4 9851.3c,d ± 206.3
MCF-7 78.65 ± 1.10 73.63a ± 0.87 78.66 ± 0.33 74.77 ± 1.21 7146.0 ± 259.6 5341.1a ± 49.1 5779.3b ± 37.1 4113.4c,d ± 79.6
Normal growth media for each cell type is defined in methods, the cytotoxicity media is DMEM without phenol red, plus 1% (low) fetal bovine serum and 4mM Glutamine.Data was analyzed by 2-way ANOVA (Media v. Time) comparison for each cell line.Post-hoc comparisons were completed using the Sidak’s test with corrections for multiple comparisons.Data are expressed as mean ± S.E. for N=4 assayed in duplicate.A significance level was established at P<0.05. a: 24 hour normal media v. 48 hour normal media b: 24 hour normal media v. 24 hour cytotoxicity media c: 48 hour normal media v. 48 hour cytotoxicity media d: 24 hour cytotoxicity media v. 48 hour cytotoxicity media
Table 2: Comparison of normal growth media and cytotoxicity assay media on cellular viability and cell number following 24-48 hour growth.