Hhat depletion reduces anchorage independent proliferation of ER positive cells. A-F, indicated breast cancer cell lines stably expressing scrambled or Hhat shRNAs were seeded at 1-2 × 104 cells/well in 24-well ultra-low adherence plates, and cell numbers were quantified 14 days later. Bars represent mean ± SD (n = 3) for all panels. Three independent experiments were performed in duplicate using cells at three different passages. *P ≤ 0.05; **P ≤ 0.01; ***P ≤ 0.001; ****P ≤ 0.0001; Student’s t test.