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. 2017 Jul 31;13:1744806917720336. doi: 10.1177/1744806917720336

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 1. — Analgesic effects of cobra neurotoxin (CNT) on mice by hot plate test. A₁ receptor antagonist (DPCPX) and A_2A receptor antagonist (ZM241385) were injected at 4 h after administration. (a) Normal saline, (b) morphine (10 mg/kg), (c) CNT LD (25 µg/kg), (d) CNT MD (50 µg/kg), (e) CNT HD (100 µg/kg). Data were represented as $\bar{x} \pm s$ , n = 6. a, p < 0.05, compared with CNT group at corresponding dose; b, p < 0.05, compared with DPCPX group.