HTR1A and type 1 diabetes mellitus: Remarkably, treatment with 8-OH-DPAT (0.5 mg/Kg, i.p.)normalized the levels of Htr1a mRNA in all the studied neuronal tissues of T1DM rats similar to those of control rats (Figure 4A, RVM: F: 13.3, p = 0.0062; LSSC: F: 6.96, p = 0.0273; DRG: F: 46.2, p = 0.0002).