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. 2015 Jan 23;7(2):190–210. doi: 10.15252/emmm.201404183

Figure 6.

Figure 6

i.c.v.-injected AβOs induce increased food intake, hypothalamic expression of orexigenic neuropeptides but no hypothalamic cell degeneration

  1. Accumulated chow intake (normalized by body weight) measured during 7 days following a single i.c.v. injection of vehicle or 10 pmol AβOs in mice (n = 13 Veh; 10 AβOs; data are representative of two independent experiments with similar results). ***P < 0.0001; Student's t-test.
  2. Daily body weight measured during 7 days after i.c.v. injection of vehicle or AβOs (n = 7 animals/group; data are representative of two independent experiments with similar results).
  3. Adult Swiss mice received a single i.c.v. injection of vehicle or 10 pmol AβOs, and hypothalamic levels of mRNA for AgRP (C; n = 6 Veh; 5 AβOs), NPY (D; n = 6 Veh; 5 AβOs) and POMC (E; n = 7 animals/group) were analyzed 7 days after injection. In (C), *P = 0.0191; in (D), *P = 0.0115; Student's t-test.
  4. Swiss mice received a single i.c.v. injection of vehicle (Veh) or 10 pmol AβOs, and their brains were analyzed by Fluorojade staining of degenerating cells 7 days after the injection. Representative images of Fluorojade staining in the hypothalamus of vehicle- or AβO-injected mice (n = 4/group). Scale bar = 100 μm in left panels (top and bottom) and 20 μm in right panels (top and bottom). Positive control (bottom left panel) was the hippocampus of a mouse that received one i.c.v. injection of quinolinic acid (36.8 nmol) and was analyzed 24 h after.

Data information: Data are expressed as means ± SEM. To assess statistical significance, AβO-injected mice were compared to vehicle-injected mice.