Cervical spinal (C4–C5) mRNA expression for inducible nitric oxide synthase (NOS, A), 5-HT2A (B), 5-HT7 (C), and tropomyosin receptor kinase B (TrkB, D) receptors, as well as brain-derived neurotrophic factor (BDNF, E) and VEGF (F), in Nx and rAIH rats with (+) or without (−) 2-DG treatment. Data are expressed as fold change from Nx rats that did not (−) receive 2-DG. Values are means ± SE; n = 6 rats in each group. *P < 0.05.