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. 2018 Dec 10;12:479. doi: 10.3389/fncel.2018.00479

FIGURE 1.

FIGURE 1

Protocol for dual neurotoxin administration in rats to generate a pre-motor PD model. Behavioral testing (sucrose preference test, rotarod, novel object recognition, hidden food test, habituation/dishabituation test) was carried out before, after toxins and after the 7-day treatment with exendin-4 (EX-4). The study included five experimental groups: sham, sham + EX-4, 6-OHDA + DSP-4 (model), 6-OHDA + DSP-4 + EX-4 (model + EX-4) and 6-OHDA + DSP-4 + EX-4 + EX9-39 (model + EX-4 + EX9-39). Histological procedures occurred after animals were culled at days 23–24.