Inhibition of miR-27a/b impairs angiogenesis in mice. (A-B) Effect of systemic infusion of 3 intravenous injections (each 12 mg/kg body weight) at day 0, day 2, and day 4 of antagomirs targeting miR-27a and miR-27b (AM-27a/b) or a control antagomir (AM-Co; n = 4-8 mice per group, 2 plugs/mouse) on miR expression in hearts, aorta, muscles, or Matrigel plugs harvested 7 days after the first injection. (C-D) Effect of antagomir infusion on the number of lectin-perfused vessels in Matrigel plugs in vivo after 7 days (n = 8 mice per group, 2 plugs/mouse: n = 15 plugs [AM-Co] and n = 16 plugs [AM-27a/b]). *P < .05 versus AM-Co. Representative images are shown in panel C.